Mitsubishi UFJ Financial (MUFG) 20-F 10 Jul 19 2018 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Mar. 31, 2019shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Document Annual Report	true
Document Transition Report	false
Document Shell Company Report	false
Entity Registrant Name	MITSUBISHI UFJ FINANCIAL GROUP INC
Entity Central Index Key	0000067088
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	13,667,770,520
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Ex Transition Period	false
Common Stock [Member]
Document Information [Line Items]
No Trading Symbol Flag	true
Security 12(b) Title	Common stock, without par value
Security Exchange Name	NYSE
American Depositary Shares [Member]
Document Information [Line Items]
Trading Symbol	MUFG
Security 12(b) Title	American depositary shares, each of which represents one share of common stock
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
ASSETS
Cash and due from banks (Note 8)		¥ 33,924,340	¥ 32,648,387
Interest-earning deposits in other banks (Note 8)		40,646,920	43,209,662
Cash, due from banks and interest-earning deposits in other banks		74,571,260	75,858,049	[1]
Call loans and funds sold		1,109,995	896,360
Receivables under resale agreements (Note 15)		10,974,740	5,725,921
Receivables under securities borrowing transactions (Note 15)		2,758,573	9,268,756
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥6,558,587 and ¥7,512,025 in 2018 and 2019) (including ¥15,007,706 and ¥18,597,303 measured at fair value under the fair value option in 2018 and 2019) (Notes 8, 15, 24 and 32)		40,576,618	35,186,689
Investment securities (Notes 3, 8 and 32):
Available-for-sale debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥11,358,439 and ¥6,981,664 in 2018 and 2019)		33,518,503	32,833,114
Held-to-maturity debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥414,857 and ¥160,828 in 2018 and 2019) (fair value of ¥3,620,672 and ¥4,452,947 in 2018 and 2019)		4,441,901	3,582,941
Equity securities (including assets pledged that secured parties are permitted to sell or repledge of ¥1,650 and ¥1,364 in 2018 and 2019) (including ¥6,699,943 and ¥6,413,867 in 2018 and 2019 measured at fair value)		6,977,600	7,238,194
Total investment securities		44,938,004	43,654,249
Loans, net of unearned income, unamortized premiums and deferred loan fees (including assets pledged that secured parties are permitted to sell or repledge of ¥898,186 and ¥802,185 in 2018 and 2019) (Notes 4 and 8)	[2]	116,883,941	117,035,895
Allowance for credit losses (Note 4)		(658,184)	(764,124)
Net loans		116,225,757	116,271,771
Premises and equipment-net (Note 5)		973,600	1,013,588
Accrued interest		359,648	324,624
Customers' acceptance liability		247,996	183,084
Intangible assets-net (Notes 2 and 6)		927,196	1,011,119
Goodwill (Notes 2 and 6)		433,891	441,334
Deferred tax assets (Note 7)		89,719	68,704
Other assets (Notes 8, 13, 14 and 32)		11,041,902	10,666,064
Total assets		305,228,899	300,570,312
LIABILITIES AND EQUITY
Deposits (Notes 8 and 9): Domestic offices, Non-interest-bearing		25,222,218	24,406,759
Deposits (Notes 8 and 9): Domestic offices, Interest-bearing		124,859,036	125,195,310
Deposits (Notes 8 and 9): Overseas offices, Non-interest-bearing		5,220,557	5,455,677
Deposits (Notes 8 and 9): Overseas offices, Interest-bearing		43,978,978	40,616,847
Total deposits		199,280,789	195,674,593
Call money and funds purchased (Notes 8 and 10)		2,450,320	2,452,543
Payables under repurchase agreements (Notes 8, 15 and 16)		25,224,632	18,134,594
Payables under securities lending transactions (Notes 8, 15 and 16)		913,087	8,170,218
Due to trust account (Note 11)		2,735,952	3,386,158
Other short-term borrowings (including ¥264,783 and ¥289,755 measured at fair value under the fair value option in 2018 and 2019) (Notes 8, 12 and 32)		6,731,073	6,881,124
Trading account liabilities (Notes 15, 24 and 32)		13,009,492	12,222,331
Obligations to return securities received as collateral (Notes 15, 16 and 32)		3,087,026	3,176,962
Bank acceptances outstanding		247,996	183,084
Accrued interest		214,735	165,921
Long-term debt (including ¥333,985 and ¥325,808 measured at fair value under the fair value option in 2018 and 2019) (Notes 8, 12 and 32)		27,990,543	27,069,556
Other liabilities (Notes 1, 7, 8, 13, 14 and 27)		7,358,506	7,407,413
Total liabilities		289,244,151	284,924,497
Commitments and contingent liabilities (Notes 25 and 27)
Mitsubishi UFJ Financial Group shareholders' equity:
Capital stock (Notes 17 and 18)-common stock authorized, 33,000,000,000 shares; common stock issued, 13,900,028,020 shares and 13,667,770,520 shares at March 31, 2018 and 2019, with no stated value		2,090,270	2,090,270
Capital surplus (Note 18)		5,577,186	5,740,165
Retained earnings (Notes 19 and 35):
Appropriated for legal reserve		239,571	239,571
Unappropriated retained earnings		8,094,026	4,945,733
Accumulated other comprehensive income, net of taxes (Note 20)		(284,269)	2,477,315
Treasury stock, at cost-737,772,882 common shares and 745,921,774 common shares at March 31, 2018 and 2019		(517,236)	(522,872)
Total Mitsubishi UFJ Financial Group shareholders' equity		15,199,548	14,970,182
Noncontrolling interests (Note 21)		785,200	675,633
Total equity		15,984,748	15,645,815
Total liabilities and equity		305,228,899	300,570,312
Consolidated VIEs [Member]
ASSETS
Cash and due from banks (Note 8)		7	130
Interest-earning deposits in other banks (Note 8)		23,655	23,161
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥6,558,587 and ¥7,512,025 in 2018 and 2019) (including ¥15,007,706 and ¥18,597,303 measured at fair value under the fair value option in 2018 and 2019) (Notes 8, 15, 24 and 32)		528,690	477,583
Investment securities (Notes 3, 8 and 32):
Total investment securities		1,828,194	1,952,683
Net loans		15,545,328	16,550,107
All other assets		294,212	187,329
Total assets		18,220,086	19,190,993
LIABILITIES AND EQUITY
Total deposits
Other short-term borrowings (including ¥264,783 and ¥289,755 measured at fair value under the fair value option in 2018 and 2019) (Notes 8, 12 and 32)		20,535	28,451
Long-term debt (including ¥333,985 and ¥325,808 measured at fair value under the fair value option in 2018 and 2019) (Notes 8, 12 and 32)		490,033	510,948
All other liabilities		62,146	84,040
Total liabilities		¥ 572,714	¥ 623,439
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.
[2]	The above table includes loans held for sale of ¥226,923 million and ¥291,794 million at March 31, 2018 and 2019, respectively.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Statement of Financial Position [Abstract]
Trading account assets pledged that secured parties are permitted to sell or repledge	¥ 7,512,025	¥ 6,558,587
Trading account assets measured at fair value under fair value option	18,597,303	15,007,706
Available-for-sale debt securities pledged that secured parties are permitted to sell or repledge	6,981,664	11,358,439
Held-to-maturity debt securities pledged that secured parties are permitted to sell or repledge	160,828	414,857
Held-to-maturity debt securities, Fair value	4,452,947	3,620,672
Equity securities pledged that secured parties are permitted to sell or repledge	1,364	1,650
Equity securities measured at fair value	6,413,867	6,699,943
Loans, net of unearned income, unamortized premiums and deferred loan fees, pledged that secured parties are permitted to sell or repledge	802,185	898,186
Other short-term borrowings measured at fair value under fair value option	289,755	264,783
Long-term debt measured at fair value under fair value option	¥ 325,808	¥ 333,985
Common stock, authorized	33,000,000,000	33,000,000,000
Common stock, issued	13,667,770,520	13,900,028,020
Common stock, stated value
Treasury stock, shares	745,921,774	737,772,882

Consolidated Statements of Inco

Consolidated Statements of Income - JPY (¥) shares in Thousands, ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Interest income:
Loans, including fees (Note 4)		¥ 2,576,417	¥ 2,271,219		¥ 2,023,649
Deposits in other banks		183,327	126,608		78,735
Investment securities:
Interest		237,378	198,715		235,638
Dividends		160,825	145,186		135,506
Trading account assets		499,724	432,595		455,860
Call loans and funds sold		10,354	10,808		11,023
Receivables under resale agreements and securities borrowing transactions		145,354	73,885		50,356
Total		3,813,379	3,259,016		2,990,767
Interest expense:
Deposits		717,366	514,868		347,430
Call money and funds purchased		3,913	5,248		1,791
Payables under repurchase agreements and securities lending transactions		333,632	165,512		100,796
Due to trust account		124	109		207
Other short-term borrowings and trading account liabilities		155,149	93,535		61,137
Long-term debt		307,797	249,483		258,278
Total		1,517,981	1,028,755		769,639
Net interest income		2,295,398	2,230,261		2,221,128
Provision for (reversal of) credit losses (Note 4)		34,330	(240,847)	[1]	253,688	[1]
Net interest income after provision for (reversal of) credit losses		2,261,068	2,471,108		1,967,440
Non-interest income:
Fees and commissions income (Note 28)		1,438,578	1,462,792		1,414,893
Foreign exchange losses-net (Note 29)		(95,987)	(49,561)		(134,885)
Trading account profits (losses)-net (Notes 29 and 32)		168,900	(73,114)		(639,184)
Investment securities gains (losses)-net (Note 3)	[2],[3]	(252,307)	286,903	[1]	281,158	[1]
Equity in earnings of equity method investees-net (Note 14)		209,732	227,984	[1]	197,821	[1]
Gains on sales of loans (Note 4)		22,663	16,109		13,286
Other non-interest income (Note 21)		103,665	63,978		63,617
Total		1,595,244	1,935,091		1,196,706
Non-interest expense:
Salaries and employee benefits (Note 13)		1,175,405	1,165,357		1,139,677
Occupancy expenses-net (Notes 5 and 27)		179,780	179,100		176,819
Fees and commissions expenses		313,745	297,847		273,675
Outsourcing expenses, including data processing		275,052	276,236		258,345
Depreciation of premises and equipment (Note 5)		98,867	96,180		99,774
Amortization of intangible assets (Note 6)		235,083	234,376		227,942
Impairment of intangible assets (Note 6)		118,108	21,900	[1]	5,803	[1]
Insurance premiums, including deposit insurance		93,756	91,847		91,881
Communications		59,166	58,067		55,274
Taxes and public charges		95,358	90,210		94,047
Impairment of goodwill (Note 6)	[1]				6,638
Provision for (reversal of) off-balance sheet credit instruments		38,463	(96,054)		106,556
Other non-interest expenses (Notes 5, 21 and 27)		302,687	329,314		355,172
Total		2,985,470	2,744,380		2,891,603
Income before income tax expense		870,842	1,661,819		272,543
Income tax expense (Note 7)		133,237	407,823		94,453
Net income before attribution of noncontrolling interests		737,605	1,253,996	[1]	178,090	[1]
Net income (loss) attributable to noncontrolling interests (Note 21)		18,960	25,836		(24,590)
Net income attributable to Mitsubishi UFJ Financial Group		718,645	1,228,160		202,680
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group		¥ 718,645	¥ 1,228,160		¥ 202,680
Earnings per common share applicable to common shareholders of Mitsubishi UFJ Financial Group (Notes 19 and 23):
Basic earnings per common share-Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group		¥ 55.03	¥ 92.40		¥ 14.93
Diluted earnings per common share-Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group	[4]	54.74	92.10		14.68
Cash dividend per common share		¥ 21	¥ 18		¥ 18
Weighted average common shares outstanding		13,058,698	13,291,842		13,574,314
Weighted average diluted common shares outstanding		13,059,182	13,293,492		13,584,885
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.
[2]	New guidance on recognition and measurement of financial assets and financial liabilities requires equity investments to be measured at fair value with changes in fair value recognized in net income for the fiscal year ended March 31, 2019. For additional information, refer to Note 1.
[3]	The following credit losses are included in Investment securities gains (losses)-net: Decline in fair value by ¥706 million, ¥99 million and ¥596 million; Other comprehensive income-net by ¥35 million, ¥15 million and ¥10 million; Total credit losses by ¥741 million, ¥114 million and ¥606 million, for the twelve months ended March 31, 2017, 2018 and 2019, respectively.
[4]	For the fiscal year ended March 31, 2019, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Decline in fair value	¥ 596	¥ 99	¥ 706
Other comprehensive income-net	10	15	35
Total credit losses	¥ 606	¥ 114	¥ 741

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income before attribution of noncontrolling interests		¥ 737,605	¥ 1,253,996	[1]	¥ 178,090	[1]
Other comprehensive income (loss), net of tax (Note 20):
Net unrealized gains on investment securities	[2]	88,180	230,308		12,961
Net debt valuation adjustments		9,729	(2,178)		(8,552)
Net unrealized losses on derivatives qualifying for cash flow hedges		(4,890)	(7,025)		(13,245)
Defined benefit plans (Note 13)		(88,940)	109,838		103,572
Foreign currency translation adjustments		(42,212)	(104,778)		(143,210)
Total		(38,133)	226,165		(48,474)
Comprehensive income		699,472	1,480,161		129,616
Net income (loss) attributable to noncontrolling interests		18,960	25,836		(24,590)
Other comprehensive income (loss) attributable to noncontrolling interests		21,209	1,320		(24,765)
Comprehensive income attributable to Mitsubishi UFJ Financial Group		¥ 659,303	¥ 1,453,005		¥ 178,971
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.
[2]	Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019.

Consolidated Statements of Equi

Consolidated Statements of Equity - JPY (¥) ¥ in Millions		Total	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Capital Stock [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Capital Surplus [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Retained Earnings Appropriated for Legal Reserve [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Unappropriated Retained Earnings [Member]		Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Accumulated Other Comprehensive Income (Loss), Net of Taxes [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Treasury Stock, at Cost [Member]	Noncontrolling Interests [Member]
Balance at beginning of fiscal year at Mar. 31, 2016				¥ 2,090,270	¥ 5,958,929	¥ 239,571	¥ 3,980,257		¥ 2,301,259	¥ (299,661)	¥ 577,642
Stock-based compensation (Note 33)					(1,856)
Net income attributable to Mitsubishi UFJ Financial Group		¥ 202,680					202,680
Cash dividends: Common stock-¥18.00 per share in 2017 and 2018, and ¥21.00 per share in 2019							(246,338)
Losses on sales of shares of treasury stock							(1,114)
Purchases of shares of treasury stock (Note 18)										(217,803)
Sales of shares of treasury stock										3,491
Net decrease (increase) resulting from changes in interests in consolidated subsidiaries, consolidated variable interest entities, and affiliated companies										(15)
Initial subscriptions of noncontrolling interests											112,644
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											113,878
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(563,918)
Decrease in noncontrolling interests related to disposition of subsidiaries											(1,026)
Net income (loss) attributable to noncontrolling interests		(24,590)									(24,590)
Dividends paid to noncontrolling interests											(6,842)
Net change during the fiscal year, Other comprehensive income (loss), net of taxes		(48,474)							(23,709)		(24,765)
Other-net					(429)						171
Balance at end of fiscal year at Mar. 31, 2017		14,764,708	¥ 13,985,532	2,090,270	5,956,644	239,571	3,931,612		2,281,423	(513,988)	779,176
Effect of adopting new guidance | Consolidation of Certain Variable Interest Entities [Member]							(3,873)		3,873		595,982
Stock-based compensation (Note 33)					315
Net income attributable to Mitsubishi UFJ Financial Group		1,228,160					1,228,160
Cash dividends: Common stock-¥18.00 per share in 2017 and 2018, and ¥21.00 per share in 2019							(240,497)
Losses on sales of shares of treasury stock							(8)
Purchases of shares of treasury stock (Note 18)										(201,102)
Sales of shares of treasury stock										2,098
Retirement of common stock					(190,054)					190,054
Net decrease (increase) resulting from changes in interests in consolidated subsidiaries, consolidated variable interest entities, and affiliated companies										66
Initial subscriptions of noncontrolling interests											48,828
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											(120,216)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(22,556)
Purchase of shares of Mitsubishi UFJ NICOS from noncontrolling interest shareholder (Note 2)					(34,751)						(15,390)
Net income (loss) attributable to noncontrolling interests		25,836									25,836
Dividends paid to noncontrolling interests											(21,675)
Net change during the fiscal year, Other comprehensive income (loss), net of taxes		226,165							224,845		1,320
Other-net					8,011						310
Balance at end of fiscal year at Mar. 31, 2018		15,645,815	14,970,182	2,090,270	5,740,165	239,571	4,945,733		2,477,315	(522,872)	675,633
Effect of adopting new guidance | Foreign Affiliated Company [Member]							(2,605)	[1]	118
Effect of adopting new guidance | Reclassification of Certain Tax Effects [Member]							29,071		(29,071)
Stock-based compensation (Note 33)					(180)
Net income attributable to Mitsubishi UFJ Financial Group		718,645					718,645
Cash dividends: Common stock-¥18.00 per share in 2017 and 2018, and ¥21.00 per share in 2019							(275,551)
Purchases of shares of treasury stock (Note 18)										(161,043)
Sales of shares of treasury stock										3,775
Retirement of common stock					(162,720)					162,720
Net decrease (increase) resulting from changes in interests in consolidated subsidiaries, consolidated variable interest entities, and affiliated companies										184
Initial subscriptions of noncontrolling interests											108,235
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											(2,830)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(20,497)
Net income (loss) attributable to noncontrolling interests		18,960									18,960
Dividends paid to noncontrolling interests											(15,853)
Net change during the fiscal year, Other comprehensive income (loss), net of taxes		(38,133)							(59,342)		21,209
Other-net					(79)						343
Balance at end of fiscal year at Mar. 31, 2019		¥ 15,984,748	¥ 15,199,548	¥ 2,090,270	¥ 5,577,186	¥ 239,571	8,094,026		(284,269)	¥ (517,236)	¥ 785,200
Effect of adopting new guidance | Foreign Affiliated Company [Member]	[2]						1,173
Effect of adopting new guidance | Recognition and Measurement of Financial Assets and Financial Liabilities [Member]							2,702,242		¥ (2,702,242)
Effect of adopting new guidance | Recognition of Breakage for Certain Prepaid Stored-Value Products [Member]							¥ 1,784
[1]	The effect mainly resulted from the adoption of new accounting guidance on "Targeted Improvements to Accounting for Hedging Activities". See Note 14 for more information.
[2]	The effect resulted from the adoption of new accounting guidance on "Leases".

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parenthetical) - ¥ / shares	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Cash dividends: Common stock, per share	¥ 21	¥ 18	¥ 18
Mitsubishi UFJ Financial Group Shareholders' Equity [Member] | Unappropriated Retained Earnings [Member]
Cash dividends: Common stock, per share	¥ 21	¥ 18	¥ 18

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Cash flows from operating activities:
Net income before attribution of noncontrolling interests		¥ 737,605	¥ 1,253,996	[1]	¥ 178,090	[1]
Adjustments to reconcile net income before attribution of noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization (Notes 5 and 6)		333,950	330,556	[1]	327,716	[1]
Impairment of goodwill (Note 6)	[1]				6,638
Impairment of intangible assets (Note 6)		118,108	21,900	[1]	5,803	[1]
Provision for (reversal of) credit losses (Note 4)		34,330	(240,847)	[1]	253,688	[1]
Employee benefit cost (income) for severance indemnities and pension plans (Note 13)		(19,839)	(7,955)	[1]	20,274	[1]
Investment securities (gains) losses-net	[2],[3]	252,307	(286,903)	[1]	(281,158)	[1]
Amortization of premiums on investment securities		78,509	118,863	[1]	95,091	[1]
Changes in financial instruments measured at fair value under fair value option, excluding trading account securities-net (Note 32)		13,880	(13,456)	[1]	103,845	[1]
Foreign exchange (gains) losses-net		565,304	(208,398)	[1]	(136,976)	[1]
Equity in earnings of equity method investees-net		(209,732)	(227,984)	[1]	(197,821)	[1]
Provision (benefit) for deferred income tax expense		(47,796)	120,595	[1]	(212,368)	[1]
Decrease (increase) in trading account assets, excluding foreign exchange contracts		(2,695,035)	5,653,904	[1]	42,609	[1]
Increase (decrease) in trading account liabilities, excluding foreign exchange contracts		1,370,846	(6,433,948)	[1]	521,093	[1]
Decrease in unearned income, unamortized premiums and deferred loan fees		(7,054)	(35,857)	[1]	(20,476)	[1]
Decrease (increase) in accrued interest receivable and other receivables		(135,656)	(172,599)	[1]	49,783	[1]
Increase in accrued interest payable and other payables		92,334	153,365	[1]	66,419	[1]
Net increase (decrease) in accrued income taxes and decrease (increase) in income tax receivables		(136,047)	1,212	[1]	(81,083)	[1]
Increase (decrease) in allowance for repayment of excess interest		1,258	(15,658)	[1]	(7,790)	[1]
Net decrease (increase) in collateral for derivative transactions		(79,338)	259,287	[1]	(276,476)	[1]
Increase in cash collateral for the use of Bank of Japan's settlement infrastructure		(60,462)	(643,568)	[1]	(207,498)	[1]
Other-net		20,862	(190,341)	[1]	441,026	[1]
Net cash provided by (used in) operating activities		228,334	(563,836)	[1]	690,429	[1]
Cash flows from investing activities:
Proceeds from sales of Available-for-sale debt securities (including proceeds from debt securities under the fair value option) (Note 3)		31,283,601	30,995,426	[1]	37,348,721	[1]
Proceeds from maturities of Available-for-sale debt securities (including proceeds from debt securities under the fair value option) (Note 3)		26,448,801	40,011,298	[1]	26,684,497	[1]
Purchases of Available-for-sale debt securities (including purchases of debt securities under the fair value option) (Note 3)		(62,309,072)	(71,593,326)	[1]	(54,588,932)	[1]
Proceeds from maturities of Held-to-maturity debt securities		560,646	1,085,603	[1]	810,838	[1]
Purchases of Held-to-maturity debt securities		(1,192,989)	(1,156,122)	[1]	(632,116)	[1]
Proceeds from sales and redemption of Equity securities (including proceeds from equity securities under the fair value option)		2,722,948	2,377,333	[1]	1,768,580	[1]
Purchases of Equity securities (including purchases of equity securities under the fair value option)		(2,770,356)	(2,197,171)	[1]	(1,727,841)	[1]
Acquisition of MUFG Capital Analytics LLC (formerly Capital Analytics II LLC), a subsidiary of TB, net of cash acquired (Note 2)	[1]				(4,154)
Purchase of common stock and preferred stock investment in Security Bank Corporation, an equity method investee of BK (Note 2)	[1]				(91,993)
Acquisition of MUFG Investor Services (US) (formerly Rydex Fund Services, LLC), a subsidiary of TB, net of cash acquired (Note 2)	[1]				(17,175)
Purchase of common stock in Hitachi Capital Corporation, an equity method investee of MUFG (Note 2)	[1]				(91,877)
Acquisition of Hattha Kaksekar Limited, a subsidiary of Krungsri, net of cash acquired (Note 2)	[1]				(556)
Purchase of common stock in Bank Danamon, an equity method investee of BK (Note 2)		(132,335)
Net decrease (increase) in loans		330,198	(169,478)	[1]	2,514,824	[1]
Net decrease (increase) in call loans, funds sold, and receivables under resale agreements and securities borrowing transactions		627,327	4,187,093	[1]	(6,971,016)	[1]
Proceeds from sales of premises and equipment		26,191	12,211	[1]	32,512	[1]
Capital expenditures for premises and equipment		(126,479)	(159,003)	[1]	(116,786)	[1]
Purchases of intangible assets		(276,880)	(239,755)	[1]	(237,253)	[1]
Proceeds from sales and dispositions of investments in equity method investees		161,566	39,710	[1]	66,729	[1]
Proceeds from sales of consolidated VIEs and subsidiaries-net		64,395	122,962	[1]	244,476	[1]
Other-net		(49,590)	(72,765)	[1]	(151,078)	[1]
Net cash provided by (used in) investing activities		(4,632,028)	3,244,016	[1]	4,840,400	[1]
Cash flows from financing activities:
Net increase in deposits		3,602,674	5,720,011	[1]	10,902,923	[1]
Net increase (decrease) in call money, funds purchased, and payables under repurchase agreements and securities lending transactions		(303,042)	3,963,120	[1]	(2,790,342)	[1]
Net increase (decrease) in due to trust account		(650,206)	51,003	[1]	(3,002,999)	[1]
Net decrease in other short-term borrowings		(118,443)	(957,705)	[1]	(1,221,838)	[1]
Proceeds from issuance of long-term debt		5,020,636	6,671,031	[1]	12,265,629	[1]
Repayments of long-term debt		(4,236,887)	(5,485,894)	[1]	(6,641,722)	[1]
Proceeds from sales of treasury stock		2,322	1,316	[1]	256	[1]
Payments for acquisition of treasury stock (Note 18)		(159,962)	(201,102)	[1]	(217,803)	[1]
Payments for acquisition of shares of certain subsidiaries from noncontrolling interest shareholders	[1]		(318)		(1,612)
Payments for acquisition of shares of Mitsubishi UFJ NICOS from noncontrolling interest shareholders (Note 2)	[1]		(50,000)
Dividends paid		(275,581)	(240,514)	[1]	(246,345)	[1]
Dividends paid by subsidiaries to noncontrolling interests		(15,853)	(21,675)	[1]	(6,842)	[1]
Other-net		197,673	(87,067)	[1]	105,995	[1]
Net cash provided by financing activities		3,063,331	9,362,206	[1]	9,145,300	[1]
Effect of exchange rate changes on cash and cash equivalents		43,975	(188,149)	[1]	(334,793)	[1]
Net increase (decrease) in cash and cash equivalents		(1,296,388)	11,854,237	[1]	14,341,336	[1]
Cash and cash equivalents at beginning of fiscal year	[1]	75,873,456	64,019,219		49,677,883
Cash and cash equivalents: Cash, due from banks and interest-earning deposits in other banks		74,571,260	75,858,049	[1]	64,009,770	[1]
Cash and cash equivalents: Restricted cash included in other assets		5,808	15,407	[1]	9,449	[1]
Cash and cash equivalents at end of fiscal year		74,577,068	75,873,456	[1]	64,019,219	[1]
Cash paid during the fiscal year for:
Interest		1,488,136	1,040,337	[1]	779,239	[1]
Income taxes, net of refunds		302,019	265,225	[1]	373,887	[1]
Non-cash investing and financing activities:
Assets acquired under capital lease arrangements		11,280	¥ 7,111	[1]	7,065	[1]
Adoption of new guidance on consolidation of certain variable interest entities (Note 26):
Increase in total assets, excluding cash and cash equivalents	[1]				598,236
Increase in total liabilities	[1]				32,254
Increase in noncontrolling interests	[1]				595,982
Acquisition of MUFG Capital Analytics LLC, a subsidiary of TB (Note 2):
Fair value of assets acquired, excluding cash and cash equivalents	[1]				5,038
Fair value of liabilities assumed	[1]				884
Acquisition of MUFG Investor Services (US), LLC, a subsidiary of TB (Note 2):
Fair value of assets acquired, excluding cash and cash equivalents	[1]				17,847
Fair value of liabilities assumed	[1]				672
Acquisition of Hattha Kaksekar Limited, a subsidiary of Krungsri (Note 2):
Fair value of assets acquired, excluding cash and cash equivalents	[1]				54,186
Fair value of liabilities assumed	[1]				¥ 53,630
Marketable Equity Securities issued by Bank Danamon transferred to investments in subsidiaries and affiliates (Note 2)		98,934
Available-for-sale debt securities transferred to Held-to-maturity debt securities		¥ 221,537
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.
[2]	New guidance on recognition and measurement of financial assets and financial liabilities requires equity investments to be measured at fair value with changes in fair value recognized in net income for the fiscal year ended March 31, 2019. For additional information, refer to Note 1.
[3]	The following credit losses are included in Investment securities gains (losses)-net: Decline in fair value by ¥706 million, ¥99 million and ¥596 million; Other comprehensive income-net by ¥35 million, ¥15 million and ¥10 million; Total credit losses by ¥741 million, ¥114 million and ¥606 million, for the twelve months ended March 31, 2017, 2018 and 2019, respectively.

Basis of Financial Statements a

Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block]	12 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block]	1. BASIS OF FINANCIAL STATEMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business Mitsubishi UFJ Financial Group, Inc. (“MUFG”) is a holding company for MUFG Bank, Ltd. (formerly, The Bank of Tokyo-Mitsubishi UFJ, Ltd., “MUFG Bank” or “BK”), Mitsubishi UFJ Trust and Banking Corporation (“Mitsubishi UFJ Trust and Banking” or “TB”), Mitsubishi UFJ Securities Holdings Co., Ltd. (“Mitsubishi UFJ Securities Holdings” or “SCHD”), Mitsubishi UFJ NICOS Co., Ltd. (“Mitsubishi UFJ NICOS”), and other subsidiaries. Mitsubishi UFJ Securities Holdings is an intermediate holding company for Mitsubishi UFJ Morgan Stanley Securities Co., Ltd. (“Mitsubishi UFJ Morgan Stanley Securities”). Through its subsidiaries and affiliated companies, MUFG engages in a broad range of financial operations, including commercial banking, investment banking, trust banking and asset management services, securities businesses, and credit card businesses, and it provides related services to individual and corporate customers. See Note 30 for more information by business segment. Basis of Financial Statements The accompanying consolidated financial statements are presented in Japanese yen, the currency of the country in which MUFG is incorporated and principally operates. The accompanying consolidated financial statements have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). In certain respects, the accompanying consolidated financial statements reflect adjustments which are not included in the consolidated financial statements issued by MUFG and certain of its subsidiaries in accordance with applicable statutory requirements and accounting practices in their respective countries of incorporation. The major adjustments include those relating to (1) investment securities, (2) derivative financial instruments, (3) allowance for credit losses, (4) income taxes, (5) consolidation, (6) premises and equipment, (7) transfer of financial assets, (8) accrued severance indemnities and pension liabilities, (9) goodwill and other intangible assets and (10) lease transactions. Fiscal years of certain subsidiaries, which end on December 31, and MUFG’s fiscal year, which ends on March 31, have been treated as coterminous. For the fiscal years ended March 31, 2017, 2018 and 2019, the effect of recording intervening events for the three-month periods ended March 31 on MUFG’s proportionate equity in net income of subsidiaries with fiscal years ended on December 31, would have resulted in an increase of ¥10.22 billion, a decrease of ¥10.76 billion, and an increase of ¥19.97 billion to net income attributable to Mitsubishi UFJ Financial Group, respectively. No intervening events occurred during each of the three-month periods ended March 31, 2017, 2018 and 2019 which, if recorded, would have had material effects on consolidated total assets, loans, total liabilities, deposits or total equity as of March 31, 2017, 2018 and 2019. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to management judgment primarily relate to the allowance for credit losses, the valuation of deferred tax assets, the valuation of financial instruments, the accounting for goodwill and intangible assets, impairment of investment securities, the allowances for repayment of excess interest and accrued severance indemnities and pension liabilities. Summary of Significant Accounting Policies Significant accounting policies applied in the accompanying consolidated financial statements are summarized below: Consolidation investees-net. The MUFG Group consolidates VIEs if it has the power to direct the activities of a VIE which most significantly impact the VIE’s economic performance and has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. To assess whether a VIE should be consolidated or not, the MUFG Group considers all factors, such as the purpose and design of the VIE, contractual arrangements, and the MUFG Group’s involvement in both the establishment of the VIE and day-to-day Assets that the MUFG Group holds in an agency, fiduciary or trust capacity are not assets of the MUFG Group and, accordingly, are not included in the accompanying consolidated balance sheets. Cash Flows Translation of Foreign Currency Financial Statements and Foreign Currency Transactions year-end Foreign currency translation gains and losses related to the financial statements of overseas entities of the MUFG Group, net of related income tax effects, are credited or charged directly to Foreign currency translation adjustments, a component of Accumulated other comprehensive income (“Accumulated OCI”). Tax effects of gains and losses on foreign currency translation of the financial statements of overseas entities are not recognized unless it is apparent that the temporary differences will reverse in the foreseeable future. Foreign currency-denominated assets and liabilities are translated into the functional currencies of the individual entities included in consolidation at the respective fiscal year-end Repurchase Agreements, Securities Lending and Other Secured Financing Transactions off-balance off-balance Collateral— mark-to-market Trading Account Securities— Investment Securities— Held-to-maturity Available-for-sale net-of-tax Equity securities include marketable equity investment securities and nonmarketable equity investment securities. Marketable equity investment securities are measured at fair value with unrealized gains or losses reflected in net income. Nonmarketable equity investment securities are primarily measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes. Nonmarketable equity investment securities held by subsidiaries that are investment companies or brokers and dealers, are subject to the specialized industry accounting principles for investment companies and brokers and dealers. Securities of those subsidiaries are carried at their fair values. Interest and dividends on investment securities are reported in Interest income. Dividends are recognized when the shareholder right to receive the dividend is established. Gains and losses on disposition of investment securities are computed using the average cost method and are recognized on the trade date. Derivative Financial Instruments— Derivatives entered into for trading purposes are carried at fair value and are reported as Trading account assets or Trading account liabilities, as appropriate. The fair values of derivative contracts executed with the same counterparty under legally enforceable master netting agreements are presented on a gross basis. Changes in the fair value of such contracts are recognized currently in Foreign exchange gains (losses)—net with respect to foreign exchange contracts and in Trading account profits (losses)—net with respect to interest rate contracts and other types of contracts. Embedded features that are not clearly and closely related to the host contracts and meet the definition of derivatives are separated from the host contracts and measured at fair value unless the contracts embedding the derivatives are measured at fair value in their entirety. Derivatives are also used to manage exposures to fluctuations in interest and foreign exchange rates arising from mismatches of asset and liability positions. Certain of those derivatives are designated as hedging instruments and qualify for hedge accounting. The MUFG Group designates a derivative as a hedging instrument at the inception of each such hedge relationship, and it documents, for such individual hedging relationships, the risk management objective and strategy, including the item being hedged, the specific risk being hedged and the method used to assess the hedge effectiveness. In order for a hedging relationship to qualify for hedge accounting, the changes in the fair value of the derivative instruments must be highly effective in achieving offsetting changes in fair values or variable cash flows of the hedged items attributable to the risk being hedged. Any ineffectiveness, which arises during the hedging relationship, is recognized in Non-interest Non-interest Non-interest Loans— held-for-sale The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUFG Americas Holdings Corporation (“MUFG Americas Holdings ” or “MUAH”), and Bank of Ayudhya Public Company Limited (“Krungsri”) based on the grouping used by the MUFG Group to determine the allowance for credit losses. The MUFG Group further classifies the Commercial segment into classes based on initial measurement attributes, risk characteristics, and its method of monitoring and assessing credit risk. Originated loans are considered impaired when, based on current information and events, it is probable that the MUFG Group will be unable to collect all the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Past due status is determined based on the contractual terms of the loan and the actual number of days since the last payment date, and is considered in determining impairment. Originated loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case loan-by-loan Originated loans are generally placed on nonaccrual status when substantial doubt exists as to the full and timely collection of either principal or interest, specifically when principal or interest is contractually past due one month or more with respect to loans within all classes of the Commercial segment, three months or more with respect to loans within the Card, MUFG Americas Holdings, and Krungsri segments, and six months or more with respect to loans within the Residential segment. A nonaccrual loan may be restored to an accrual status when interest and principal payments become current and management expects that the borrower will make future contractual payments as scheduled. When a loan is placed on nonaccrual status, interest accrued but not received is generally reversed against interest income. Cash receipts on nonaccrual loans, for which the ultimate collectibility of principal is uncertain, are applied as principal reductions; otherwise, such collections are credited to income. The MUFG Group modifies certain loans in conjunction with its loss-mitigation activities. Through these modifications, concessions are granted to a borrower who is experiencing financial difficulty, generally in order to minimize economic loss, to avoid foreclosure or repossession of collateral, and to ultimately maximize payments received from the borrower. The concessions granted vary by portfolio segment, by program, and by borrower-specific characteristics, and may include interest rate reductions, term extensions, payment deferrals, and partial principal forgiveness. Loan modifications that represent concessions made to borrowers who are experiencing financial difficulties are identified as troubled debt restructurings (“TDRs”). Generally, accruing loans that are modified in a TDR remain as accruing loans subsequent to the modification, and nonaccrual loans remain as nonaccrual. However, if a nonaccrual loan has been modified as a TDR, the borrower is not delinquent under the modified terms, and demonstrates that its financial condition has improved, the MUFG Group may reclassify the loan to accrual status. This determination is generally performed at least once a year through a detailed internal credit rating review process. Once a nonaccrual loan is deemed to be a TDR, the MUFG Group will continue to designate the loan as a TDR even if the loan is reclassified to accrual status. A loan that has been modified into a TDR is considered to be impaired until it matures, is repaid, or is otherwise liquidated, regardless of whether the borrower performs under the modified terms. Because loans modified in TDRs are considered to be impaired, these loans are measured for impairment using the MUFG Group’s established asset-specific allowance methodology, which considers the expected default rates for the modified loans. See “ Allowance for Credit Losses” . In accordance with the guidance on loans and debt securities acquired with deteriorated credit quality, impaired loans acquired for which it is probable that the MUFG Group will be unable to collect all contractual receivables are initially recorded at the present value of amounts expected to be received. For these impaired loans, the related valuation allowances are not carried over or created initially. Accretable yield is limited to the excess of the investor’s estimate of undiscounted cash flows over the investor’s initial investment in the loan. Subsequent increases in cash flows expected to be collected are recognized prospectively through adjustment of the loan’s yield over its remaining life after reduction of any remaining allowance for credit losses for the loan established after its acquisition, if any, while any decrease in such cash flows below those initially expected at acquisition plus additional cash flows expected to be collected arising from changes in estimate after acquisition is recognized as an impairment. Loan Securitization Allowance for Credit Losses charge-off Key elements relating to the policies and discipline used in determining the allowance for credit losses are credit classification and the related borrower categorization process. The categorization is based on conditions that may affect the ability of borrowers to service their debt, taking into consideration current financial information, historical payment experience, credit documentation, public information, analyses of relevant industry segments or existing economic conditions. In determining the appropriate level of the allowance, the MUFG Group evaluates the probable loss by collateral value, historical loss experience, probability of insolvency and category of loan based on its type and characteristics. The MUFG Group calculates the allowance for credit losses over the loss emergence period that is a time between a loss occurring event and the subsequent confirmation of a loss. The MUFG Group updates these conditions and probable loss on a regular basis and upon the occurrence of unexpected change in the economic environment. The methodologies used to estimate the allowance and the charge-off Commercial segment In the Commercial segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment represents the impairment allowance determined in accordance with the guidance on accounting by creditors for the impairment of a loan. The factors considered by management in determining impairment are the internal credit rating assigned to each borrower which represents the borrower’s creditworthiness determined based on payment status, the number of delinquencies, and the probability of collecting principal and interest payments when due. The impairment of a loan is measured based on the present value of expected future cash flows discounted at the loan’s original effective interest rate, or the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. The formula allowance is applied to loans that are categorized as Normal or Close Watch, excluding loans identified as a TDR, based on the internal credit rating and historical loss factors which are based on the loss experience. See Note 4 for the information on loans to borrowers categorized based on the internal borrower rating. Estimated losses inherent in the loans at the balance sheet date are calculated by multiplying the default ratio by the nonrecoverable ratio (determined as a complement of the recovery ratio). The default ratio is determined by each internal credit rating, taking into account the historical number of defaults of borrowers within each internal credit rating divided by the total number of borrowers. The recovery ratio is mainly determined by the historical experience of collections against loans in default. The default ratio, the recovery ratio and other indicators are continually reviewed to determine the appropriate level of the allowance. Because the evaluation of inherent loss for these loans involves an uncertainty, subjectivity and judgment, the estimation of the formula allowance is back-tested by comparing the allowance with the actual results subsequent to the balance sheet date. The results of such back-testing are evaluated by management to determine whether the manner and level of the formula allowance needs to be changed in subsequent years. The allocated allowance for large groups of smaller-balance homogeneous loans is established through a process that begins with estimates of probable losses inherent in the portfolio. These estimates are based upon various analyses, including historical delinquency and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans categorized as Legally/Virtually Bankrupt, the carrying amount of loans less estimated value of the collateral and guaranteed amount is generally considered uncollectible, and is charged off. Residential segment In the Residential segment, the loans are comprised of smaller-balance homogeneous loans that are pooled by their internal credit ratings-based on the number of delinquencies. The loans in this segment are generally secured by collateral. Collateral values are based on internal valuation sources, and the allowance is determined for unsecured amounts. The allowance for the nondelinquent group of loans is determined based on historical loss experience. For delinquent groups of loans, the MUFG Group determines the allowance based on the probability of insolvency by the number of actual delinquencies and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the carrying amount of loans less estimated value of the collateral and guaranteed amount is generally considered uncollectible and charged off. Card segment In the Card segment, the loans are smaller-balance homogeneous loans that are pooled by their internal credit rating based on the number of delinquencies. The allowance for loans in this segment is generally determined based on the probability of insolvency by the number of actual delinquencies and historical loss experience. For calculating the allocated allowance for loans specifically identified for evaluation, impaired loans are aggregated for the purpose of measuring impairment using historical loss factors. Loans that have been modified into a TDR are treated as impaired loans, and the allowance for credit losses is determined using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the amount of loans is generally fully charged off. MUFG Americas Holdings segment In the MUFG Americas Holdings segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, the allocated allowance for large groups of smaller-balance homogeneous loans, and the unallocated allowance. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for consumer loans as well as for smaller balance commercial loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off The unallocated allowance represents an estimate of additional losses inherent in the loan portfolio and is composed of attribution factors, which are based upon management’s evaluation of various conditions that are not directly measured in the determination of the allocated allowance. The conditions used for consideration of the unallocated allowance at each balance sheet date include factors, such as existing general economic and business conditions affecting the key lending areas and products of the MUFG Group, credit quality trends and risk identification, collateral values, loan volumes, underwriting standards and concentrations, specific industry conditions, recent loss experience and the duration of the current business cycle. The MUFG Group reviews these conditions and has an internal discussion with senior credit officers on a quarterly basis. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Commercial loans are generally considered uncollectible based on an evaluation of the financial condition of a borrower as well as the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Consumer loans are generally considered uncollectible based on past due status and the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Krungsri segment In the Krungsri segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for smaller balance loans such as housing loans, credit card loans, and personal loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Loans to customers are charged off when they are determined to be uncollectible considering the financial condition of a borrower. Allowance for Off-Balance off-balance Premises and Equipment Years Buildings 15 to 50 Equipment and furniture 2 to 20 Leasehold improvements 5 to 39 Maintenance, repairs and minor improvements are charged to operations as incurred. Major improvements are capitalized. Net gains or losses on dispositions of premises and equipment are included in Other non-interest Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of an asset to be held and used is measured by a comparison of the carrying amount to future undiscounted net cash flows expected to be generated by the asset. If an asset is considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value. For purposes of recognition and measurement of an impairment loss, a long-lived asset or assets are grouped with other assets and liabilities at the lowest level with independent and identifiable cash flows. Assets to be disposed of by sale are reported at the lower of the carrying amount or fair value less estimated cost to sell. Asset retirement obligations related to restoration of certain leased properties upon lease termination are recorded in Other liabilities with a corresponding increase in leasehold improvements. The amounts represent the present value of expected future cash flows associated with returning such leased properties to their original condition. The difference between the gross and present value of expected future cash flows is accreted over the life of the related leases as a non-interest Goodwill Goodwill arising from a business combination is not amortized but is tested at least annually for impairment. Goodwill is recorded at a designated reporting unit level for the purpose of assessing impairment. A reporting unit is an operating segment, or an identified business unit one level below an operating segment. An impairment loss is recognized to the extent that the carrying amount of goodwill exceeds its implied fair value. Intangible assets Useful lives Amortization method Software 2 to 10 Straight-line Core deposit intangibles 10 to 16 Straight-line Customer relationships 7 to 27 Straight-line, Declining-balance Trade names 7 to 40 Straight-line Intangible assets having indefinite useful lives are not amortized but are subject to annual impairment tests. An impairment exists if the carrying value of an indefinite-lived intangible asset exceeds its fair value. For other intangible assets subject to amortization, an impairment is recognized if the carrying amount is not recoverable and the carrying amount exceeds the fair value of the intangible asset. The MUFG Group capitalizes certain costs associated with the acquisition or development of internal-use internal-use Accrued Severance and Pension Liabilities non-interest Long-Term Debt Obligations under Guarantees Allowance for Repayment of Excess Interest Fees and Commissions The following is an explanation of the MUFG Group’s key revenue from contracts with customers and the timing of its recognition. Fees and commissions on deposits consist of fees and commissions charged for transaction-based services such as usage of automated teller machines and withdrawal services, and for periodic account maintenance services. The MUFG Group’s performance obligation for transaction-based services is satisfied and the fees and commissions are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction, while the MUFG Group’s performance obligation for maintenance services is satisfied and the fees and commissions are recognized over the course of each month. Fees and commissions on remittances and transfers consist of fees and commissions charged for settlement transactions such as domestic fund remittances, including electronic banking transactions, and are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction. Fees and commissions on foreign trading business consist of fees and commissions charged for fund collection and trade-related financing services related to foreign trading business, and are recognized in the period in which the related service is provided. If they arise from foreign trading business activities under which the customer consumes the related services at a point in time (e.g. foreign exchange fees), such fees are recognized at the same point in time. If they arise from foreign trading business activities under which the customer consumes the related services equally over the period of service (e.g. commercial letters of credit), such fees are recognized over the same period. Fees and commissions on credit card business consist of fees and commissions such as interchange income, royalty and other service charges from franchisees. Interchange income from the credit card business is recognized as processed transactions are settled through the associated payment networks, while royalty and other service charges related to the credit card business are recognized on a straight-line basis over the period of service. Fees and commissions on security-related services primarily consist of fees and commissions for sales and transfers of securities including investment funds, underwriting, brokerage and advisory services, arrangement fees on securitizations, and agency services for the calculation and payment of dividends. Fees and commissions on security-related services are recognized in the period in which the related service is provided. If they arise from security-related services under which the customer consumes the related services at a point in time (e.g. sales and transfers of securities are executed at the customer’s direction; underwritings of debt and equity securities or securitizations are completed at the trade date; advice is provided to the clients; and dividends are calculated and then paid to investors), such fees are recognized at the same point in time. If they arise from security-related services under which the customer consumes the related services equally over the period of service (e.g. retainer fees on M&A advisory fees), such fees are recogniz

Business Developments _Text Blo

Business Developments [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Business Developments [Text Block]	2. BUSINESS DEVELOPMENTS MUFG Bank’s Acquisition of Security Bank Corporation’s shares On April 1, 2016, MUFG Bank acquired newly issued common shares and preferred shares with voting rights of Security Bank Corporation (“Security Bank”), representing in the aggregate approximately 20.0% of Security Bank’s equity interest for ¥91,993 million. Security Bank is listed on the Philippines Stock Exchange and is not part of any local conglomerate in the Philippines. Considering both MUFG Bank’s ownership of the common stock and preferred stock and representation on the board of directors, the MUFG Group has determined that MUFG Bank has the ability to exercise significant influence over the operating and financial policies of Security Bank and applied the equity method of accounting for its investment. Mitsubishi UFJ Trust and Banking’s Acquisition of Capital Analytics II LLC On April 30, 2016, Mitsubishi UFJ Trust and Banking acquired 100% ownership of Capital Analytics II LLC for ¥4,494 million in cash, and thereby recorded goodwill of ¥2,858 million and intangible assets of ¥1,388 million. Capital Analytics II LLC is an overseas fund management company that mainly provides fund administration services for private equity funds. The purpose of this acquisition is to meet the diversified global fund administration needs of its Japanese and overseas customers through the utilization of Capital Analytics II LLC’s unparalleled operational expertise and the MUFG Group’s extensive network. Upon conclusion of the acquisition, Capital Analytics II LLC was renamed MUFG Capital Analytics LLC. During the fiscal year ended March 31, 2017, measurement period adjustments were applied to the acquisition date fair values, which decreased goodwill by ¥115 million. Krungsri’s Acquisition of Hattha Kaksekar Limited On September 12, 2016, Krungsri acquired 100% ownership of Hattha Kaksekar Limited for ¥15,703 million in cash, and thereby recorded goodwill of ¥8,280 million and intangible assets of ¥476 million. Hattha Kaksekar Limited is a financial institution in Cambodia providing financial services primarily to sole proprietors. The purpose of this acquisition is to enable the MUFG Group to tap into the growth of the Cambodian market by leveraging the knowhow of Ngern Tid Lor Co., Ltd., a subsidiary of Krungsri engaged in microfinance in Thailand, with an aim to promote and develop the microfinance business. MUFG’s Acquisition of Hitachi Capital Corporation’s shares On October 3, 2016, MUFG acquired 23.0% of the common shares of Hitachi Capital Corporation (“Hitachi Capital”) for ¥91,877 million from Hitachi, Ltd. Considering both MUFG’s ownership of the common stock and representation on the board of directors, the MUFG Group has determined that MUFG has the ability to exercise significant influence over the operating and financial policies of Hitachi Capital and applied the equity method of accounting for its investment. Mitsubishi UFJ Trust and Banking’s Acquisition of Rydex Fund Services, LLC On October 4, 2016, Mitsubishi UFJ Trust and Banking acquired 100% ownership of Rydex Fund Services, LLC for ¥17,431 million in cash, and thereby recorded goodwill of ¥5,232 million and intangible assets of ¥11,507 million. Rydex Fund Services, LLC is an overseas fund management company that mainly provides fund administration services for funds established under the 1940 Investment Companies Act of the United States. The purpose of this acquisition is to meet the diversified global fund administration needs of its Japanese and overseas customers through the utilization of Rydex Fund Services, LLC’s unparalleled operational expertise and the MUFG Group’s extensive network. Upon conclusion of the acquisition, Rydex Fund Services, LLC was renamed MUFG Investor Services (US), LLC. Mitsubishi UFJ NICOS Became a Wholly-Owned Subsidiary On May 15, 2017, MUFG and its subsidiary Mitsubishi UFJ NICOS entered into a share exchange agreement for MUFG to acquire the remaining 15.02% ownership of Mitsubishi UFJ NICOS by agreeing, on October 2, 2017, to pay ¥50,000 million cash to the only holder of Mitsubishi UFJ NICOS common stock other than MUFG. The transaction was accounted for as a non-cancellable Acquisition of shares in Bank Danamon in Indonesia On December 26, 2017, MUFG Bank entered into conditional share purchase agreements with Asia Financial (Indonesia) Pte. Ltd. (“AFI”) and other affiliated entities (the “Sellers”) to acquire their 73.8% equity interests in an Indonesian bank, PT Bank Danamon Indonesia, Tbk. (“Danamon”), subject to applicable regulatory approvals. Danamon, which was established in 1956, is the fifth most profitable Indonesian commercial bank in terms of net income. Danamon provides banking and financial products and services to consumer, micro-finance, small and medium enterprise (“SME”) and corporate customers, with a network of around 1,800 offices in Indonesia. MUFG Bank intends to establish an integrated and comprehensive services platform that serves as a gateway for clients wishing to make inroads into Indonesia’s growing economy as well as local companies seeking to expand into the region. This investment is also expected to strategically allow MUFG Bank to benefit from Danamon’s foothold in the developing local retail and SME segments to deepen its banking franchise in Indonesia. This strategic investment by MUFG Bank will be executed through three steps (the “Proposed Transaction”), and the completion of the Proposed Transaction will result in MUFG Bank becoming the largest shareholder in Danamon and Danamon becoming a consolidated subsidiary of MUFG Bank. In Step 1, MUFG Bank acquired an initial 19.9% equity interest in Danamon from the Sellers on December 29, 2017, based on a price of IDR 8,323 (approximately ¥70 (1) (1) Available-for-sale In Step 2, MUFG Bank acquired an additional 20.1% equity interest in Danamon from the Sellers on August 3, 2018, based on a price of IDR 8,921 (approximately ¥69 (2) (2) In Step 3, MUFG Bank intends to seek the necessary approvals to increase its equity interest in Danamon beyond the 40%, and this will provide an opportunity for all other existing Danamon shareholders to either remain as shareholders or receive cash from MUFG Bank. With the closing of Step 3, MUFG Bank’s final equity interest in Danamon is expected to be above 73.8%. The prices for Danamon’s shares in Step 3 will be based on a similar approach as Step 1 and Step 2. See Note 35 for further developments on acquisition of shares in Danamon. Notes: (1) Calculated based on the exchange rate of IDR1 = ¥0.0084 (2) Calculated based on the exchange rate of IDR1 = ¥0.0077 Acquisition of Colonial First State Global Asset Management On October 31, 2018, Mitsubishi UFJ Trust and Banking entered into a Share Sale Deed with Commonwealth Bank of Australia (“CBA”), and its wholly-owned subsidiary, Colonial First State Group Limited (the “Seller”) to acquire 100% of the shares in each of nine subsidiaries of the Seller, which collectively represent CBA’s global asset management business known as Colonial First State Global Asset Management (“CFSGAM”), for approximately ¥328 billion or approximately AUD 4.0 billion, subject to applicable regulatory and other approvals and certain conditions. CFSGAM is the third largest asset management group by assets under management in Asian markets excluding Japan, offers a wide range of products including equities, fixed income and alternatives, and has specialist capabilities in Asian and emerging equity markets, alternatives (property and infrastructure), as well as passive and other products. The investment in CFSGAM aims to meet various client needs by expanding product lineup and enhancing presence as the largest asset management firm in the Asia and Oceania region. Acquisition of DVB Bank SE’s Aviation Finance Division On March 1, 2019, MUFG Bank and its consolidated subsidiary, BOT Lease Co., Ltd. (“BOT Lease”), entered into an agreement with DVB Bank SE (“DVB”) to transfer DVB’s aviation finance division to MUFG Bank and BOT Lease, subject to applicable regulatory and other approvals and certain conditions. Under the agreement, the entire aviation finance client lending portfolio of approximately ¥716.3 billion or approximately €5.6 billion, employees, and other parts of the operating infrastructure will be transferred to MUFG Bank. In addition, DVB’s aviation investment management and asset management businesses will be transferred to a newly established subsidiary of BOT Lease. The purpose of the transaction is to improve the MUFG Group’s ability to offer bespoke solutions to its clients by enhancing its global corporate investment banking business platform in terms of higher returns, diversifying its portfolio, broadening its customer base, and securing experienced professionals.

Investment Securities _Text Blo

Investment Securities [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Investment Securities [Text Block]	3. INVESTMENT SECURITIES The following tables present the amortized cost, gross unrealized gains and losses, and fair value of Available-for-sale Held-to-maturity Available-for-sale Available-for-sale Held-to-maturity At March 31, 2018: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 24,272,345 ¥ 299,402 ¥ 3,843 ¥ 24,567,904 Japanese prefectural and municipal bonds 1,532,143 7,808 2,520 1,537,431 Foreign government and official institution bonds 2,207,662 8,938 44,908 2,171,692 Corporate bonds 1,104,799 15,589 1,028 1,119,360 Residential mortgage-backed securities 1,632,346 752 15,563 1,617,535 Commercial mortgage-backed securities 95,383 473 620 95,236 Asset-backed securities 1,546,989 12,775 1,415 1,558,349 Other debt securities (1) 165,002 3,635 3,030 165,607 Total ¥ 32,556,669 ¥ 349,372 ¥ 72,927 ¥ 32,833,114 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,807 ¥ 40,212 ¥ — ¥ 1,141,019 Foreign government and official institution bonds 59,330 383 103 59,610 Residential mortgage-backed securities 885,965 1,660 14,726 (2) 872,899 Commercial mortgage-backed securities 171,647 4,107 1,018 (2) 174,736 Asset-backed securities 1,365,192 8,438 1,222 1,372,408 Total ¥ 3,582,941 ¥ 54,800 ¥ 17,069 ¥ 3,620,672 Equity securities: Marketable equity securities ¥ 2,789,392 ¥ 3,925,680 ¥ 43,488 ¥ 6,671,584 Total ¥ 2,789,392 ¥ 3,925,680 ¥ 43,488 ¥ 6,671,584 Notes: (1) Other debt securities in the table above include ¥152,374 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity At March 31, 2019: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,748,558 ¥ 330,115 ¥ 977 ¥ 24,077,696 Japanese prefectural and municipal bonds 2,203,978 22,593 5 2,226,566 Foreign government and official institution bonds 2,648,874 18,099 25,554 2,641,419 Corporate bonds 1,117,302 14,251 822 1,130,731 Residential mortgage-backed securities 1,635,220 1,469 21,338 1,615,351 Commercial mortgage-backed securities 132,996 310 2,351 130,955 Asset-backed securities 1,494,629 10,846 2,553 1,502,922 Other debt securities (1) 192,930 2,851 2,918 192,863 Total ¥ 33,174,487 ¥ 400,534 ¥ 56,518 ¥ 33,518,503 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,701 ¥ 41,619 ¥ — ¥ 1,142,320 Foreign government and official institution bonds 138,731 193 212 138,712 Residential mortgage-backed securities 910,990 1,209 21,202 (2) 890,997 Commercial mortgage-backed securities 160,267 1,903 2,032 (2) 160,138 Asset-backed securities 2,131,212 1,415 11,847 2,120,780 Total ¥ 4,441,901 ¥ 46,339 ¥ 35,293 ¥ 4,452,947 Notes: (1) Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity Contractual Maturities The amortized cost and fair values of Held-to-maturity Available-for-sale Held-to-maturity Available-for-sale Amortized Fair value Fair value (in millions) Due in one year or less ¥ 74,173 ¥ 74,059 ¥ 12,539,746 Due from one year to five years 332,491 341,814 10,847,990 Due from five years to ten years 1,405,140 1,434,699 5,316,284 Due after ten years 2,630,097 2,602,375 4,814,483 Total ¥ 4,441,901 ¥ 4,452,947 ¥ 33,518,503 Realized Gains and Losses and Transfers of Investment Securities For the fiscal years ended March 31, 2017 and 2018, gross realized gains on sales of Available-for-sale Available-for-sale For the fiscal year ended March 31, 2019, gross realized gains on sales of Available-for-sale Available-for-sale For the fiscal year ended March 31, 2017, the MUFG Group transferred certain securities which had a carrying value of ¥14,142 million from Held-to-maturity Available-for-sale Held-to-maturity Held-to-maturity Other-than-temporary Impairments of Investment Securities For the fiscal years ended March 31, 2017 and 2018, losses resulting from impairment of investment securities to reflect the decline in value considered to be other-than-temporary were ¥33,823 million and ¥8,196 million, respectively, which were included in Investment securities gains (losses)—net in the accompanying consolidated statements of income. The losses of ¥33,823 million for the fiscal year ended March 31, 2017 included losses of ¥32,038 million from marketable equity securities, ¥741 million from Available-for-sale Available-for-sale For the fiscal year ended March 31, 2019, losses resulting from impairment of investment securities to reflect the decline in value considered to be other-than-temporary were ¥606 million, which were included in Investment securities gains (losses)—net in the accompanying consolidated statements of income. The losses of ¥606 million for the fiscal year ended March 31, 2019 was recorded substantially from Available-for-sale Available-for-sale Gross Unrealized Losses and Fair Value The following tables show the gross unrealized losses and fair value of Available-for-sale Held-to-maturity Available-for-sale Held-to-maturity Less than 12 months 12 months or more Total At March 31, 2018: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 4,767,893 ¥ 2,701 ¥ 187,000 ¥ 1,142 ¥ 4,954,893 ¥ 3,843 140 Japanese prefectural and municipal bonds 400,705 453 353,047 2,067 753,752 2,520 193 Foreign government and official institution bonds 846,818 16,955 818,937 27,953 1,665,755 44,908 157 Corporate bonds 312,993 856 74,717 172 387,710 1,028 150 Residential mortgage-backed securities 438,545 2,644 623,285 12,919 1,061,830 15,563 503 Commercial mortgage-backed securities 50,898 386 9,067 234 59,965 620 60 Asset-backed securities 144,073 1,403 5,345 12 149,418 1,415 29 Other debt securities 12,341 367 56,117 2,663 68,458 3,030 23 Total ¥ 6,974,266 ¥ 25,765 ¥ 2,127,515 ¥ 47,162 ¥ 9,101,781 ¥ 72,927 1,255 Held-to-maturity Foreign government and official institution bonds ¥ 55,837 ¥ 103 ¥ — ¥ — ¥ 55,837 ¥ 103 10 Residential mortgage-backed securities 299,286 3,487 451,968 11,239 751,254 14,726 332 Commercial mortgage-backed securities 2,150 2 169,065 1,016 171,215 1,018 32 Asset-backed securities 275,814 1,222 — — 275,814 1,222 11 Total ¥ 633,087 ¥ 4,814 ¥ 621,033 ¥ 12,255 ¥ 1,254,120 ¥ 17,069 385 Equity securities: Marketable equity securities ¥ 448,489 ¥ 43,482 ¥ 28 ¥ 6 ¥ 448,517 ¥ 43,488 116 Total ¥ 448,489 ¥ 43,482 ¥ 28 ¥ 6 ¥ 448,517 ¥ 43,488 116 Less than 12 months 12 months or more Total At March 31, 2019: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 4,149,302 ¥ 976 ¥ 5,599 ¥ 1 ¥ 4,154,901 ¥ 977 39 Japanese prefectural and municipal bonds 12,772 5 — — 12,772 5 4 Foreign government and official institution bonds 397,718 1,125 1,160,671 24,429 1,558,389 25,554 179 Corporate bonds 163,615 776 79,758 46 243,373 822 92 Residential mortgage-backed securities 316,942 1,757 648,353 19,581 965,295 21,338 536 Commercial mortgage-backed securities 42,126 678 57,167 1,673 99,293 2,351 104 Asset-backed securities 164,738 2,553 — — 164,738 2,553 87 Other debt securities 77,660 549 37,027 2,369 114,687 2,918 38 Total ¥ 5,324,873 ¥ 8,419 ¥ 1,988,575 ¥ 48,099 ¥ 7,313,448 ¥ 56,518 1,079 Held-to-maturity Foreign government and official institution bonds ¥ — ¥ — ¥ 55,084 ¥ 212 ¥ 55,084 ¥ 212 10 Residential mortgage-backed securities 74,180 1,199 798,165 20,003 872,345 21,202 457 Commercial mortgage-backed securities 3,154 37 155,011 1,995 158,165 2,032 32 Asset-backed securities 1,423,048 10,196 241,233 1,651 1,664,281 11,847 102 Total ¥ 1,500,382 ¥ 11,432 ¥ 1,249,493 ¥ 23,861 ¥ 2,749,875 ¥ 35,293 601 Evaluating Investment Securities for Other-than-temporary Impairments The following describes the nature of the MUFG Group’s investments and the conclusions reached in determining whether the unrealized losses were temporary or other-than-temporary. Corporate bonds As of March 31, 2019, unrealized losses associated with corporate bonds were primarily related to private placement bonds issued by Japanese non-public The following table presents a roll-forward of the credit loss component recognized in earnings. The balance at the beginning of each fiscal year represents the credit loss component for which OTTI occurred on debt securities in prior periods. The additions represent the first time a debt security was credit impaired or when subsequent credit impairment has occurred. The credit loss component is reduced when the corporate bonds mature or are sold. 2017 2018 2019 (in millions) Balance at beginning of fiscal year ¥ 6,691 ¥ 4,125 ¥ 3,499 Additions: Initial credit impairments 645 111 555 Subsequent credit impairments 96 3 51 Reductions: Securities sold or matured (3,307 ) (740 ) (2,344 ) Balance at end of fiscal year ¥ 4,125 ¥ 3,499 ¥ 1,761 The cumulative declines in fair value of the credit impaired debt securities, which were mainly corporate bonds, held at March 31, 2018 and 2019 were ¥2,992 million and ¥1,069 million, respectively. Of which, the credit loss components recognized in earnings were ¥3,499 million and ¥1,761 million, and the remaining amounts related to all other factors recognized in Accumulated OCI before taxes were ¥507 million and ¥692 million at March 31, 2018 and 2019, respectively. Residential mortgage-backed securities As of March 31, 2019, unrealized losses on these securities were primarily driven by securities guaranteed by a U.S. government agency or a government-sponsored agency which are collateralized by residential mortgage loans. Unrealized losses mainly resulted from changes in interest rates and not from changes in credit quality. The MUFG Group analyzed that no OTTI was identified on such securities as of March 31, 2019 and no impairment loss has been recorded because the strength of the issuers’ guarantees through direct obligations or support from the U.S. government is expected to be sufficient to recover the entire amortized cost basis of these securities. Asset-backed securities As of March 31, 2019, unrealized losses on these securities were primarily driven by certain collateralized loan obligations (“CLOs”), highly illiquid securities for which fair values are difficult to determine. Unrealized losses arise from widening credit spreads, deterioration of the credit quality of the underlying collateral, uncertainty regarding the valuation of such securities and the market’s view of the performance of the fund managers. When the fair value of a security is lower than its amortized cost or when any security is subject to a deterioration in credit rating, the MUFG Group undertakes a cash flow analysis of the underlying collateral to estimate the OTTI and confirms the intent and ability to hold these securities until recovery. Based on the analysis performed, no OTTI was identified as of March 31, 2019 and no impairment loss has been recorded. Other debt securities As of March 31, 2019, other debt securities primarily consist of private placement debt conduit bonds, which are not rated by external credit rating agencies. The unrealized losses on these bonds result from a higher return on capital expected by the secondary market compared with the return on capital required at the time of origination when the bonds were purchased. The MUFG Group estimates loss projections for each security by assessing the underlying collateral of each security. The MUFG Group estimates the portion of loss attributable to credit based on the expected cash flows of the underlying collateral using estimates of current key assumptions such as probability of default and loss severity. Cash flow analysis of the underlying collateral provides an estimate of OTTI, which is performed when the fair value of a security is lower than its amortized cost and potential impairment is identified. Based on the analysis, no OTTI losses were recorded in the accompanying consolidated statements of income. Marketable equity securities included in Equity Securities The MUFG Group determines whether unrealized losses on marketable equity securities are temporary based on its ability and positive intent to hold the investments for a period of time sufficient to allow for any anticipated recovery and the results of its review conducted to identify and evaluate investments that have indications of possible impairment. Impairment is evaluated considering various factors, and their relative significance varies from case to case. The MUFG Group’s review includes, but is not limited to, consideration of the following factors: The length of time that the fair value of the investment has been below cost The extent to which the fair value of investments has been below cost as of the end of the reporting period The financial condition and near-term prospects of the issuer At March 31, 2018, unrealized losses on marketable equity securities which have been in a continuous loss position are considered temporary based on the evaluation as described above. OTTI of marketable equity securities is eliminated according to new guidance on recognition and measurement of financial assets and financial liabilities. Equity Securities The following table presents net realized losses on sales of equity securities, and net unrealized losses on equity securities still held at March 31, 2019. Fiscal year ended 2019 (in millions) Net losses recognized during the period (1) ¥ (278,746 ) Less: Net losses recognized during the period on equity securities sold during the period (3,303 ) Net unrealized losses recognized during the reporting period still held at the reporting date ¥ (275,443 ) Note: (1) Included in Investment securities gains (losses)—net. Nonmarketable Equity Securities Nonmarketable equity securities included in Equity securities were primarily carried at cost of ¥538,251 million at March 31, 2018, because their fair values were not readily determinable. The remaining balances were nonmarketable equity securities included in Equity securities held by certain subsidiaries subject to specialized industry accounting principles for investment companies and broker-dealers and carried at fair value of ¥28,359 million at March 31, 2018. See Note 32 for the valuation techniques and inputs used to estimate the fair values. With respect to cost-method investments of ¥97,586 million at March 31, 2018, the MUFG Group estimated a fair value using commonly accepted valuation techniques to determine whether the investments were impaired in each reporting period. See Note 32 for the details of these commonly accepted valuation techniques. If the fair value of the investment is less than the cost of the investment, the MUFG Group proceeds to evaluate whether the impairment is other-than-temporary. With respect to cost-method investments of ¥440,665 million at March 31, 2018, the MUFG Group performed a test to determine whether any impairment indicators existed for each investment in each reporting period. If an impairment indicator exists, the MUFG Group estimates the fair value of the cost-method investment. If the fair value of the investment is less than the cost of the investment, the MUFG Group performs an evaluation of whether the impairment is other-than-temporary. The primary method the MUFG Group uses to identify impairment indicators is a comparison of the MUFG Group’s share of an investee’s net assets to the cost of the MUFG Group’s investment in the investee. The MUFG Group also considers whether significant adverse changes in the regulatory, economic or technological environment have occurred with respect to the investee. The MUFG Group periodically monitors the status of each investee including the credit rating, which is generally updated once a year based on the annual financial statements of the issuer. In addition, if an event that could impact the credit rating of an investee occurs, the MUFG Group reassesses the appropriateness of the credit rating assigned to the issuer in order to maintain an updated credit rating. The MUFG Group did not estimate the fair value of cost-method investments, which had aggregated costs of ¥437,486 million at March 31, 2018, since it was not practical and the MUFG Group identified no impairment indicators. Based on the procedures described above, the MUFG Group recognized OTTI losses on the cost-method investments of ¥1,044 million and ¥1,422 million for the fiscal years ended March 31, 2017 and 2018, respectively. Each impairment loss was recognized based on the specific circumstances of each individual company. No impairment loss was individually material. Measurement Alternative of Equity Securities The following table presents the carrying value of nonmarketable equity securities held at March 31, 2019, that were measured under the measurement alternative, and the related adjustments for these securities for the fiscal year ended March 31, 2019. Fiscal year ended 2019 (in millions) Measurement alternative balance at March 31, 2019 ¥ 563,733 Measurement alternative impairment losses (1) ¥ (2,292 ) Measurement alternative downward changes for observable prices (1)(2) ¥ — Measurement alternative upward changes for observable prices (1)(2)(3) ¥ 53,077 Notes: (1) Included in Investment securities gains (losses)—net. (2) Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer. (3) The MUFG Group applied measurement alternative upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Loans and Allowance for Credit Losses [Text Block]	4. LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans at March 31, 2018 and 2019 by domicile and industry of the borrower are summarized below. Classification of loans by industry is based on the industry segment loan classifications as defined by the Bank of Japan. 2018 2019 (in millions) Domestic: Manufacturing ¥ 10,876,625 ¥ 11,153,996 Construction 781,262 717,664 Real estate 11,763,769 11,706,419 Services 2,689,086 2,653,191 Wholesale and retail 7,989,080 7,643,397 Banks and other financial institutions (1) 4,818,364 5,213,020 Communication and information services 1,551,533 1,510,596 Other industries 8,939,291 8,756,483 Consumer 16,287,332 15,802,024 Total domestic 65,696,342 65,156,790 Foreign: Governments and official institutions 920,538 841,695 Banks and other financial institutions (1) 12,851,570 11,641,373 Commercial and industrial 30,591,173 31,951,169 Other 7,270,928 7,597,502 Total foreign 51,634,209 52,031,739 Unearned income, unamortized premiums—net and deferred loan fees—net (294,656 ) (304,588 ) Total (2) ¥ 117,035,895 ¥ 116,883,941 Notes: (1) Loans to so-called “non-bank Non-bank (2) The above table includes loans held for sale of ¥226,923 million and ¥291,794 million at March 31, 2018 and 2019, respectively. The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUFG Americas Holdings, and Krungsri based on the grouping used by the MUFG Group to determine the allowance for credit losses. See Note 1 for further information. Nonaccrual Loans Originated loans are generally placed on nonaccrual status when substantial doubt exists as to the full and timely collection of either principal or interest, when principal or interest is contractually past due one month or more with respect to loans within all classes of the Commercial segment, three months or more with respect to loans within the Card, MUFG Americas Holdings, and Krungsri segments, and six months or more with respect to loans within the Residential segment. See Note 1 for further information. The nonaccrual loans by class at March 31, 2018 and 2019 is shown below: 2018 2019 (in millions) Commercial Domestic ¥ 332,994 ¥ 272,777 Manufacturing 77,163 65,896 Construction 10,791 9,813 Real estate 33,317 23,152 Services 30,717 26,188 Wholesale and retail 108,175 94,531 Banks and other financial institutions 1,145 898 Communication and information services 13,815 11,955 Other industries 37,549 25,406 Consumer 20,322 14,938 Foreign-excluding MUAH and Krungsri 109,516 111,002 Residential 69,464 68,499 Card 61,387 61,419 MUAH 52,282 46,549 Krungsri 121,286 127,424 Total (1) ¥ 746,929 ¥ 687,670 Note: (1) The above table does not include loans held for sale of ¥61 million and ¥12,702 million at March 31, 2018 and 2019, respectively, and loans acquired with deteriorated credit quality of ¥6,659 million and ¥6,284 million at March 31, 2018 and 2019, respectively. Impaired Loans The MUFG Group’s impaired loans primarily include nonaccrual loans and TDRs. The following table shows information about impaired loans by class at March 31, 2018 and 2019: Recorded Loan Balance At March 31, 2018: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 626,469 ¥ 188,984 ¥ 815,453 ¥ 875,795 ¥ 331,851 Manufacturing 361,268 36,566 397,834 408,124 166,098 Construction 10,936 7,172 18,108 18,490 7,921 Real estate 43,553 23,053 66,606 71,809 10,665 Services 38,097 16,600 54,697 59,335 25,890 Wholesale and retail 128,661 49,628 178,289 189,404 94,832 Banks and other financial institutions 1,125 26 1,151 1,151 972 Communication and information services 18,782 7,852 26,634 28,082 16,041 Other industries 12,978 34,282 47,260 67,525 5,350 Consumer 11,069 13,805 24,874 31,875 4,082 Foreign-excluding MUAH and Krungsri 122,243 40,249 162,492 190,518 82,855 Loans acquired with deteriorated credit quality 7,837 — 7,837 15,470 4,324 Residential (4) 105,089 6,261 111,350 134,777 16,928 Card (4) 66,964 388 67,352 74,840 21,223 MUAH (4) 48,895 33,650 82,545 94,565 7,743 Krungsri (4) 58,529 25,565 84,094 90,957 29,402 Total (3) ¥ 1,036,026 ¥ 295,097 ¥ 1,331,123 ¥ 1,476,922 ¥ 494,326 Recorded Loan Balance At March 31, 2019: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 560,474 ¥ 157,465 ¥ 717,939 ¥ 759,399 ¥ 227,004 Manufacturing 349,597 28,189 377,786 384,306 92,919 Construction 8,366 5,975 14,341 14,779 6,574 Real estate 20,848 29,961 50,809 55,943 5,704 Services 30,239 13,020 43,259 46,838 20,059 Wholesale and retail 118,253 45,620 163,873 175,714 84,503 Banks and other financial institutions 1,012 21 1,033 1,033 830 Communication and information services 8,794 6,929 15,723 16,587 6,817 Other industries 13,772 17,989 31,761 38,342 6,874 Consumer 9,593 9,761 19,354 25,857 2,724 Foreign-excluding MUAH and Krungsri 127,521 34,484 162,005 183,133 85,966 Loans acquired with deteriorated credit quality 8,136 — 8,136 14,990 5,450 Residential (4) 97,176 6,495 103,671 120,526 14,357 Card (4) 64,691 330 65,021 72,226 21,829 MUAH (4) 46,552 23,208 69,760 83,300 8,294 Krungsri (4) 57,066 26,193 83,259 90,377 28,254 Total (3) ¥ 961,616 ¥ 248,175 ¥ 1,209,791 ¥ 1,323,951 ¥ 391,154 Notes: (1) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans’ original effective interest rate, loans’ observable market price, or the fair value of the collateral if the loan is a collateral-dependent loan. (2) Included in impaired loans at March 31, 2018 and 2019 are accrual TDRs as follows: ¥536,748 million and ¥497,013 million—Commercial; ¥40,734 million and ¥34,449 million—Residential; ¥28,541 million and ¥26,183 million—Card; ¥39,333 million and ¥33,155 million—MUFG Americas Holdings; and ¥24,899 million and ¥26,851 million—Krungsri, respectively. (3) In addition to impaired loans presented in the above table, there were impaired loans held for sale of ¥61 million and ¥12,702 million at March 31, 2018 and 2019, respectively. (4) Impaired Loans for Residential, Card, MUAH and Krungsri segments in the above table include loans acquired with deteriorated credit quality. The following table shows information regarding the average recorded loan balance and recognized interest income on impaired loans for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 Average Recognized Average Recognized Average Recognized (in millions) Commercial Domestic ¥ 1,137,501 ¥ 14,116 ¥ 918,093 ¥ 9,441 ¥ 766,847 ¥ 12,383 Manufacturing 601,256 5,845 472,081 3,787 387,725 6,057 Construction 26,684 434 19,465 281 15,721 291 Real estate 96,229 1,593 74,087 1,146 57,850 1,069 Services 81,967 1,236 59,916 794 48,945 1,044 Wholesale and retail 238,798 3,466 186,356 2,347 171,687 2,848 Banks and other financial institutions 2,272 11 1,729 8 1,330 8 Communication and information services 27,531 570 25,461 388 22,478 491 Other industries 24,709 397 50,377 215 39,178 234 Consumer 38,055 564 28,621 475 21,933 341 Foreign-excluding MUAH and Krungsri 291,612 5,132 209,297 4,244 159,999 3,127 Loans acquired with deteriorated credit quality 9,974 432 8,591 492 7,814 182 Residential 133,876 1,883 119,409 1,563 107,165 1,620 Card 75,809 2,483 69,831 1,993 66,187 1,614 MUAH 91,690 1,664 83,504 1,993 71,162 2,292 Krungsri 51,597 2,201 75,370 3,899 83,165 4,995 Total ¥ 1,792,059 ¥ 27,911 ¥ 1,484,095 ¥ 23,625 ¥ 1,262,339 ¥ 26,213 Interest income on nonaccrual loans for all classes was recognized on a cash basis when ultimate collectibility of principal was certain. Otherwise, cash receipts were applied as principal reductions. Interest income on accruing impaired loans, including TDRs, was recognized on an accrual basis to the extent that the collectibility of interest income was reasonably certain based on management’s assessment. The following table shows a roll-forward of accrual TDRs and other impaired loans (including nonaccrual TDRs) for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 (in millions) Accrual TDRs: Balance at beginning of fiscal year ¥ 613,844 ¥ 819,819 ¥ 670,255 Additions (new accrual TDR status) (1) 492,269 144,368 71,033 Transfers to other impaired loans (including nonaccrual TDRs) (40,182 ) (25,122 ) (19,053 ) Loans sold (1,637 ) (39,378 ) (26 ) Principal payments and other (244,475 ) (229,432 ) (104,558 ) Balance at end of fiscal year (1) ¥ 819,819 ¥ 670,255 ¥ 617,651 Other impaired loans (including nonaccrual TDRs): Balance at beginning of fiscal year ¥ 1,111,306 ¥ 896,031 ¥ 660,868 Additions (new other impaired loans (including nonaccrual TDRs) status) (1)(2) 541,789 281,275 222,003 Charge-off (106,097 ) (98,355 ) (55,309 ) Transfers to accrual TDRs (333,478 ) (43,858 ) (22,110 ) Loans sold (44,984 ) (31,581 ) (26,022 ) Principal payments and other (272,505 ) (342,644 ) (187,290 ) Balance at end of fiscal year (1) ¥ 896,031 ¥ 660,868 ¥ 592,140 Notes: (1) For the fiscal year ended March 31, 2017, lease receivables of ¥875 million and ¥74 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,065 million and ¥389 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2017. For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019. (2) Included in the additions of other impaired loans for the fiscal years ended March 31, 2017, 2018 and 2019 are nonaccrual TDRs as follows: ¥11,699 million, ¥12,002 million and ¥13,493 million—Card; ¥25,023 million, ¥12,799 million and ¥12,738 million—MUFG Americas Holdings; and ¥7,471 million, ¥12,280 million and ¥10,519 million—Krungsri, respectively. Troubled Debt Restructurings The following table summarizes the MUFG Group’s TDRs by class for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 Troubled Debt Restructurings Pre- Post- Pre- Post- Pre- Post- (in millions) Commercial (1)(3) Domestic ¥ 377,563 ¥ 377,563 ¥ 70,380 ¥ 69,021 ¥ 36,693 ¥ 36,693 Manufacturing 335,347 335,347 35,954 35,954 11,654 11,654 Construction 1,377 1,377 1,020 1,020 703 703 Real estate 7,457 7,457 1,269 1,269 948 948 Services 5,268 5,268 4,139 4,139 2,141 2,141 Wholesale and retail 22,868 22,868 16,280 14,921 19,315 19,315 Banks and other financial institutions — — 246 246 — — Communication and information services 2,405 2,405 9,643 9,643 268 268 Other industries 1,493 1,493 761 761 472 472 Consumer 1,348 1,348 1,068 1,068 1,192 1,192 Foreign-excluding MUAH and Krungsri 58,178 58,178 25,522 25,522 5,692 5,692 Loans acquired with deteriorated credit quality 1,030 1,030 — — 50 50 Residential (1)(3) 13,092 13,092 9,763 9,763 7,379 7,379 Card (2)(3) 17,256 16,759 17,436 16,912 19,685 18,837 MUAH (2)(3) 38,558 38,449 40,578 38,224 19,837 19,837 Krungsri (2)(3) 32,340 32,340 24,015 23,929 24,392 24,330 Total ¥ 538,017 ¥ 537,411 ¥ 187,694 ¥ 183,371 ¥ 113,728 ¥ 112,818 2017 2018 2019 Troubled Debt Restructurings Recorded Investment (in millions) Commercial (1)(3) Domestic ¥ 4,587 ¥ 4,067 ¥ 11,002 Manufacturing 1,373 839 312 Construction 11 — 89 Real estate 38 10 — Services 217 822 473 Wholesale and retail 2,530 2,231 1,713 Banks and other financial institutions — — — Communication and information services 385 140 8,365 Other industries — — 50 Consumer 33 25 — Foreign-excluding MUAH and Krungsri 11,268 — — Loans acquired with deteriorated credit quality — — — Residential (1)(3) 231 159 362 Card (2)(3) 3,661 4,191 3,442 MUAH (2)(3) 6,624 2,565 349 Krungsri (2)(3) 3,984 4,789 7,926 Total ¥ 30,355 ¥ 15,771 ¥ 23,081 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings and Krungsri segments include accrual and nonaccrual loans. (3) For the fiscal year ended March 31, 2017, extension of the stated maturity date of loans was the primary concession type in the Residential segment, reduction in the stated rate was the primary concession type in the Commercial and Card segments and payment deferrals were the primary concession type in the MUFG Americas Holdings and Krungsri segments. For the fiscal year ended March 31, 2018, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and payment deferrals were the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment. The following table summarizes outstanding recorded investment balances of TDRs by class at March 31, 2018 and 2019: 2018 2019 (in millions) Commercial (1) Domestic ¥ 482,566 ¥ 445,312 Manufacturing 320,702 311,890 Construction 7,362 4,591 Real estate 33,289 27,657 Services 23,987 17,135 Wholesale and retail 70,119 69,350 Banks and other financial institutions 6 135 Communication and information services 12,837 3,780 Other industries 9,712 6,357 Consumer 4,552 4,417 Foreign-excluding MUAH and Krungsri 54,182 51,701 Residential (1) 40,734 34,449 Card (2) 67,352 65,021 MUAH (2) 65,373 48,128 Krungsri (2) 54,036 62,980 Total ¥ 764,243 ¥ 707,591 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings and Krungsri segments include accrual and nonaccrual loans. Included in the outstanding recorded investment balances as of March 31, 2018 and 2019 are nonaccrual TDRs as follows: ¥38,811 million and ¥38,838 million—Card; ¥26,040 million and ¥14,973 million—MUFG Americas Holdings; and ¥24,855 million and ¥31,069 million—Krungsri, respectively. A modification of terms of a loan under a TDR mainly involves: (i) a reduction in the stated interest rate applicable to the loan, (ii) an extension of the stated maturity date of the loan, (iii) a partial forgiveness of the principal of the loan, or (iv) a combination of all of these. Those loans are also considered impaired loans, and hence the allowance for credit losses is separately established for each loan. As a result, the amount of allowance for credit losses increases in many cases upon classification as a TDR loan. The amount of pre-modification TDRs for the Commercial and Residential segments in the above tables include accruing loans, and do not include nonaccrual loans. Once a loan is classified as a nonaccrual loan, a modification would have little likelihood of resulting in the recovery of the loan in view of the severity of the financial difficulty of the borrower. Therefore, even if a nonaccrual loan is modified, the loan continues to be classified as a nonaccrual loan. The vast majority of modifications to nonaccrual loans are temporary extensions of the maturity dates, typically for periods up to 90 days, and continually made as the borrower is unable to repay or refinance the loan at the extended maturity. Accordingly, the impact of such TDRs on the outstanding recorded investment is immaterial, and the vast majority of nonaccrual TDRs have subsequently defaulted. TDRs that subsequently defaulted in the Commercial and Residential segments in the above tables include those accruing loans that became past due one month or more within the Commercial segment and six months or more within the Residential segment, and those accruing loans reclassified to nonaccrual loans due to financial difficulties even without delinquencies. This is because classification as a nonaccrual loan is regarded as default under the MUFG Group’s credit policy. Also, the MUFG Group defines default as payment default for the purpose of the disclosure. In regards to the Card, MUFG Americas Holdings and Krungsri segments, the TDRs in the above tables represent nonaccrual and accruing loans, and the defaulted loans in the above table represent nonaccruing and accruing loans that became past due one month or more within the Card segment, 60 days or more within the MUFG Americas Holdings segment, and six months or more within the Krungsri segment. Historical payment defaults are one of the factors considered when projecting future cash flows in determining the allowance for credit losses for each segment. The MUFG Group provided commitments to extend credit to customers with TDRs. The amounts of such commitments were ¥172,159 million and ¥169,819 million at March 31, 2018 and 2019, respectively. See Note 25 for further discussion of commitments to extend credit. Credit Quality Indicator Credit quality indicators of loans by class at March 31, 2018 and 2019 are shown below: At March 31, 2018: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,050,274 ¥ 1,690,924 ¥ 271,456 ¥ 51,012,654 Manufacturing 10,215,497 596,662 57,730 10,869,889 Construction 727,932 43,673 9,116 780,721 Real estate 11,379,291 279,931 32,692 11,691,914 Services 2,467,540 175,733 24,081 2,667,354 Wholesale and retail 7,518,383 374,706 77,870 7,970,959 Banks and other financial institutions 4,800,281 10,923 1,145 4,812,349 Communication and information services 1,491,093 48,153 11,958 1,551,204 Other industries 8,780,517 120,466 36,951 8,937,934 Consumer 1,669,740 40,677 19,913 1,730,330 Foreign-excluding MUAH and Krungsri 36,049,123 569,137 108,276 36,726,536 Loans acquired with deteriorated credit quality 12,035 11,728 3,562 27,325 Total ¥ 85,111,432 ¥ 2,271,789 ¥ 383,294 ¥ 87,766,515 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 14,012,978 ¥ 67,258 ¥ 14,080,236 Card ¥ 528,108 ¥ 61,707 ¥ 589,815 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,360,445 ¥ 14,238 ¥ 4,509,044 ¥ 59,890 ¥ 116,842 ¥ 9,060,459 Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 5,284,018 ¥ 198,526 ¥ 123,106 ¥ 5,605,650 At March 31, 2019: Normal Close Watch Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,391,991 ¥ 1,242,075 ¥ 217,745 ¥ 50,851,811 Manufacturing 10,819,594 279,801 47,968 11,147,363 Construction 672,152 37,236 7,857 717,245 Real estate 11,403,613 222,791 22,515 11,648,919 Services 2,436,489 174,784 19,953 2,631,226 Wholesale and retail 7,240,801 329,249 68,736 7,638,786 Banks and other financial institutions 5,199,889 7,654 898 5,208,441 Communication and information services 1,465,652 34,542 10,172 1,510,366 Other industries 8,610,464 119,581 24,947 8,754,992 Consumer 1,543,337 36,437 14,699 1,594,473 Foreign-excluding MUAH and Krungsri 35,418,267 562,854 112,103 36,093,224 Loans acquired with deteriorated credit quality 11,622 10,833 3,790 26,245 Total ¥ 84,821,880 ¥ 1,815,762 ¥ 333,638 ¥ 86,971,280 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,661,794 ¥ 66,290 ¥ 13,728,084 Card ¥ 516,983 ¥ 61,599 ¥ 578,582 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,752,021 ¥ 15,540 ¥ 4,699,698 ¥ 51,948 ¥ 88,356 ¥ 9,607,563 Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 5,682,245 ¥ 199,070 ¥ 129,222 ¥ 6,010,537 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Total loans of MUFG Americas Holdings do not include FDIC covered loans which are not individually rated totaling ¥953 million and ¥689 million as of March 31, 2018 and 2019, respectively. The MUFG Group will be reimbursed for a substantial portion of any future losses on FDIC covered loans under the terms of the FDIC loss share agreements. The MUFG Group classifies loans into risk categories based on relevant information about the ability of borrowers to service their debt, including, but not limited to, historical and current financial information, historical and current payment experience, credit documentation, public and non-public The primary credit quality indicator for loans within all classes of the Commercial segment is the internal credit rating assigned to each borrower based on the MUFG Group’s internal borrower ratings of 1 through 15, with the rating of 1 assigned to a borrower with the highest quality of credit. When assigning a credit rating to a borrower, the MUFG Group evaluates the borrower’s expected debt-service capability based on various information, including financial and operating information of the borrower as well as information on the industry in which the borrower operates, and the borrower’s business profile, management and compliance system. In evaluating a borrower’s debt-service capability, the MUFG Group also conducts an assessment of the level of earnings and an analysis of the borrower’s net worth. Based on the internal borrower rating, loans within the Commercial segment are categorized as Normal (internal borrower ratings of 1 through 9), Close Watch (internal borrower ratings of 10 through 12), and Likely to become Bankrupt or Legally/Virtually Bankrupt (internal borrower ratings of 13 through 15). Loans to borrowers categorized as Normal represent those that are not deemed to have collectibility issues. Loans to borrowers categorized as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower’s loans are TDRs or loans contractually past due 90 days or more for special reasons. Loans to borrowers categorized as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment, The accrual status is a primary credit quality indicator for loans within the Residential segment, the Card segment and consumer loans within the MUFG Americas Holdings segment. The accrual status of these loans is determined based on the number of delinquent payments. See Note 1 for further details of categorization of Accrual and Nonaccrual. Commercial loans within the MUFG Americas Holdings segment are categorized as either pass or criticized based on the internal credit rating assigned to each borrower. Criticized credits are those that are internally risk graded as Special Mention, Substandard or Doubtful. Special Mention credits are potentially weak, as the borrower has begun to exhibit deteriorating trends, which, if not corrected, may jeopardize repayment of the loan and result in further downgrade. Classified credits are those that are internally risk graded as Substandard or Doubtful. Substandard credits have well-defined weaknesses, which, if not corrected, could jeopardize the full satisfaction of the debt. A credit classified as Doubtful has critical weaknesses that make full collection improbable on the basis of currently existing facts and conditions. Loans within the Krungsri segment are categorized as Normal, Special Mention, Substandard, Doubtful, and Doubtful of Loss primarily based on their delinquency status. Loans categorized as Special Mention generally represent those that have the overdue principal or interest payments for a cumulative period exceeding one month commencing from the contractual due date. Loans categorized as Substandard, Doubtful or Doubtful of Loss generally represent those that have the overdue principal or interest payments for a cumulative period exceeding three months commencing from the contractual due date. For the Commercial, Residential and Card segments, credit quality indicators are based on information as of March 31. For the MUFG Americas Holdings and Krungsri segments, credit quality indicators are generally based on information as of December 31. Past Due Analysis Ages of past due loans by class at March 31, 2018 and 2019 are shown below: At March 31, 2018: 1-3 months Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 13,290 ¥ 43,913 ¥ 57,203 ¥ 50,955,451 ¥ 51,012,654 ¥ 6,419 Manufacturing 1,495 1,300 2,795 10,867,094 10,869,889 — Construction 359 437 796 779,925 780,721 — Real estate 2,090 3,225 5,315 11,686,599 11,691,914 1,633 Services 1,025 620 1,645 2,665,709 2,667,354 26 Wholesale and retail 3,886 4,198 8,084 7,962,875 7,970,959 1,349 Banks and other financial institutions — 21 21 4,812,328 4,812,349 — Communication and information services 657 328 985 1,550,219 1,551,204 — Other industries 251 28,315 28,566 8,909,368 8,937,934 — Consumer 3,527 5,469 8,996 1,721,334 1,730,330 3,411 Foreign-excluding MUAH and Krungsri 12,512 19,655 32,167 36,694,369 36,726,536 1,083 Residential 78,073 19,399 97,472 13,974,118 14,071,590 10,806 Card 18,887 32,218 51,105 528,284 579,389 — MUAH 23,145 13,648 36,793 9,009,426 9,046,219 771 Krungsri 116,665 99,315 215,980 5,383,477 5,599,457 — Total ¥ 262,572 ¥ 228,148 ¥ 490,720 ¥ 116,545,125 ¥ 117,035,845 ¥ 19,079 At March 31, 2019: 1-3 months Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 11,551 ¥ 30,648 ¥ 42,199 ¥ 50,809,612 ¥ 50,851,811 ¥ 6,900 Manufacturing 1,597 3,036 4,633 11,142,730 11,147,363 — Construction 218 60 278 716,967 717,245 1 Real estate 2,034 4,256 6,290 11,642,629 11,648,919 2,524 Services 778 569 1,347 2,629,879 2,631,226 1 Wholesale and retail 2,791 2,390 5,181 7,633,605 7,638,786 62 Banks and other financial institutions — 21 21 5,208,420 5,208,441 — Communication and information services 411 758 1,169 1,509,197 1,510,366 — Other industries 365 13,037 13,402 8,741,590 8,754,992 — Consumer 3,357 6,521 9,878 1,584,595 1,594,473 4,312 Foreign-excluding MUAH and Krungsri 10,881 19,993 30,874 36,062,350 36,093,224 236 Residential 62,686 16,615 79,301 13,641,449 13,720,750 6,584 Card 17,203 30,568 47,771 527,421 575,192 — MUAH 28,696 10,827 39,523 9,557,501 9,597,024 2,287 Krungsri 126,313 106,777 233,090 5,771,541 6,004,631 — Total ¥ 257,330 ¥ 215,428 ¥ 472,758 ¥ 116,369,874 ¥ 116,842,632 ¥ 16,007 Note: (1) Total loans in the above table do not include loans held for sale and loans acquired with deteriorated credit quality and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. Allowance for Credit Losses Changes in the allowance for credit losses by portfolio segment for the fiscal years ended March 31, 2017, 2018 and 2019 are shown below: Fiscal year ended March 31, 2017: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 816,559 ¥ 58,598 ¥ 31,187 ¥ 108,454 ¥ 96,332 ¥ 1,111,130 Provision for (reversal of) credit losses 177,295 12,224 13,289 (62 ) 50,942 253,688 Charge-offs 108,262 5,339 16,309 32,074 51,774 213,758 Recoveries 21,124 1,853 1,998 2,916 16,058 43,949 Net charge-offs 87,138 3,486 14,311 29,158 35,716 169,809 Others (1) (6,030 ) — — (5,501 ) (1,290 ) (12,821 ) Balance at end of fiscal year ¥ 900,686 ¥ 67,336 ¥ 30,165 ¥ 73,733 ¥ 110,268 ¥ 1,182,188 Fiscal year ended March 31, 2018: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 900,686 ¥ 67,336 ¥ 30,165 ¥ 73,733 ¥ 110,268 ¥ 1,182,188 Provision for (reversal of) credit losses (297,401 ) (22,291 ) 23,422 (9,309 ) 64,732 (240,847 ) Charge-offs 134,807 3,838 22,696 14,701 56,067 232,109 Recoveries 24,913 1,339 1,228 6,140 17,490 51,110 Net charge-offs 109,894 2,499 21,468 8,561 38,577 180,999 Others (1) (2,293 ) — — (2,098 ) 8,173 3,782 Balance at end of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Fiscal year ended March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Provision for (reversal of) credit losses (43,850 ) (4,480 ) 23,809 9,277 49,574 34,330 Charge-offs 76,664 274 24,310 13,224 59,569 174,041 Recoveries 17,565 834 932 3,733 21,053 44,117 Net charge-offs 59,099 (560 ) 23,378 9,491 38,516 129,924 Others (1) 1,466 — — (970 ) (10,842 ) (10,346 ) Balance at end of fiscal year ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Note: (1) Others are principally comprised of gains or losses from foreign exchange translation. Allowance for credit losses and recorded investment in loans by portfolio segment at March 31, 2018 and 2019 are shown below: At March 31, 2018: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 414,706 ¥ 16,644 ¥ 21,223 ¥ 7,743 ¥ 29,402 ¥ 489,718 Collectively evaluated for impairment 64,375 24,718 10,884 45,571 115,161 260,709 Loans acquired with deteriorated credit quality (2) 12,017 1,184 12 451 33 13,697 Total ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Loans: Individually evaluated for impairment ¥ 977,945 ¥ 110,197 ¥ 66,957 ¥ 82,545 ¥ 84,094 ¥ 1,321,738 Collectively evaluated for impairment 86,761,245 13,961,393 512,432 8,963,679 5,515,363 115,714,112 Loans acquired with deteriorated credit quality (2) 27,325 8,646 10,426 15,188 6,193 67,778 Total (1) ¥ 87,766,515 ¥ 14,080,236 ¥ 589,815 ¥ 9,061,412 ¥ 5,605,650 ¥ 117,103,628 At March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 312,970 ¥ 14,175 ¥ 21,829 ¥ 8,294 ¥ 28,254 ¥ 385,522 Collectively evaluated for impairment 63,366 23,413 10,708 44,282 116,529 258,298 Loans acquired with deteriorated credit quality (2) 13,279 1,038 13 5 29 14,364 Total ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Loans: Individually evaluated for impairment ¥ 879,944 ¥ 102,948 ¥ 64,752 ¥ 69,760 ¥ 83,259 ¥ 1,200,663 Collectively evaluated for impairment 86,065,091 13,617,802 510,440 9,527,264 5,921,372 115,641,969 Loans acquired with deteriorated credit quality (2) 26,245 7,334 3,390 11,228 5,906 54,103 Total (1) ¥ 86,971,280 ¥ 13,728,084 ¥ 578,582 ¥ 9,608,252 ¥ 6,010,537 ¥ 116,896,735 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment. Nonperforming loans were actively disposed of by sales during recent years. The allocated allowance for credit losses for such loans was removed from the allowance for credit losses and transferred to the valuation allowance for loans held for sale upon a decision to sell. Net charge-offs in the above table include a decrease from charge-offs in the allowance for credit losses amounting to ¥11.0 billion and ¥12.2 billion for the fiscal years ended March 31, 2017 and 2018, respectively, and an increase fro

Premises and Equipment _Text Bl

Premises and Equipment [Text Block]	12 Months Ended
	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Premises and Equipment [Text Block]	5. PREMISES AND EQUIPMENT Premises and equipment at March 31, 2018 and 2019 consisted of the following: 2018 2019 (in millions) Land ¥ 370,669 ¥ 362,742 Buildings 739,665 829,606 Equipment and furniture 659,699 648,598 Leasehold improvements 311,645 305,281 Construction in progress 119,195 34,002 Total 2,200,873 2,180,229 Less accumulated depreciation 1,187,285 1,206,629 Premises and equipment-net ¥ 1,013,588 ¥ 973,600 Premises and equipment include capitalized leases, principally related to data processing equipment, which amounted to ¥31,458 million and ¥34,141 million at March 31, 2018 and 2019, respectively. Accumulated depreciation on such capitalized leases at March 31, 2018 and 2019 amounted to ¥17,298 million and ¥19,946 million, respectively. MUFG Bank has entered into sales agreements to sell its buildings and land and, under separate agreements, leased those properties back for its business operations, including bank branches. MUFG Bank either provided nonrecourse financing to the buyers for the sales proceeds or invested in the equity or common stock of the buyers. As a result, MUFG Bank was considered to have continuing involvement with the properties. For accounting and reporting purposes, these transactions were accounted for under the financing method with the sales proceeds recognized as a financing obligation. The properties were reported on the accompanying consolidated balance sheets and depreciated. The financing obligation at March 31, 2018 and 2019 was ¥41,892 million and ¥40,732 million, respectively. For the fiscal years ended March 31, 2017, 2018 and 2019, the MUFG Group recognized ¥5,964 million, ¥39,358 million and ¥31,345 million, respectively, of impairment losses for long-lived assets, primarily real estate which was either formerly used for its banking operations and is no longer used or real estate that is being used where recovery of the carrying amount is doubtful. In addition, ¥901 million, ¥213 million and ¥411 million of impairment losses were recognized for real estate held for sale for the fiscal years ended March 31, 2017, 2018 and 2019, respectively. These losses are included in Other non-interest Impairment losses for the fiscal year ended March 31, 2018 included ¥34,016 million of losses on long-lived assets used for MUFG Bank’s operations. In relation to a restructuring of operating divisions of MUFG Bank, which is a transformation of Corporate Banking Business Group and Retail Banking Business Group into Retail & Commercial Banking Business Group and Japanese Corporate & Investment Banking Business Group, based on an MUFG Re-Imagining Impairment losses for the fiscal year ended March 31, 2019 included ¥21,096 million losses on long-lived assets, including land, buildings, and equipment and furniture, which were held by certain consumer finance subsidiary. See Note 6 for the details of these impairments.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets [Text Block]	12 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets [Text Block]	6. GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill The table below presents the movement in the carrying amount of goodwill by business segment during the fiscal years ended March 31, 2018 and 2019: Effective April 1, 2018, the MUFG Group reorganized its business groups in an effort to further integrate the expertise and capabilities of its consolidated subsidiaries to respond to the needs of customers more effectively and efficiently, as part of its current medium-term business plan. To make and execute unified group-wide strategies based on customer characteristics and the nature of business, the MUFG Group integrated the operations of its consolidated subsidiaries into six business segments.—Retail & Commercial Banking, Japanese Corporate & Investment Banking, Global Corporate & Investment Banking, Global Commercial Banking, Asset Management & Investor Services, and Global Markets. See Note 30 for the business segment information of the MUFG Group. Global Asset Global Total (in millions) Balance at March 31, 2017: Goodwill (1) ¥ 611,827 ¥ 28,134 ¥ 2,300 ¥ 642,261 Accumulated impairment losses (1) (177,750 ) (14,368 ) — (192,118 ) 434,077 13,766 2,300 450,143 Foreign currency translation adjustments and other (8,399 ) (410 ) — (8,809 ) Balance at March 31, 2018: Goodwill 603,428 27,724 2,300 633,452 Accumulated impairment losses (177,750 ) (14,368 ) — (192,118 ) 425,678 13,356 2,300 441,334 Foreign currency translation adjustments and other (7,206 ) (237 ) — (7,443 ) Balance at March 31, 2019: Goodwill 596,222 27,487 2,300 626,009 Accumulated impairment losses (177,750 ) (14,368 ) — (192,118 ) ¥ 418,472 ¥ 13,119 ¥ 2,300 ¥ 433,891 Note: (1) Effective April 1, 2018, the MUFG Group reorganized its business groups. Goodwill originally recognized for Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri was ¥1,900,019 million, which has been fully impaired before April 1, 2017. As these impairment losses recorded in past before the reorganization of the segment and are irrelevant to the annual impairment test under the new segment, the accumulated impaired loss is not allocated to new business segments after the reorganization of business group. U.S. GAAP requires to test goodwill for impairment at least annually, or more frequently if events or changes in circumstances indicate that goodwill may be impaired, using a two-step For the fiscal years ended March 31, 2017, the MUFG Group recognized ¥6,638 million, in impairment of goodwill relating to reporting units within the Trust Assets Business Group segment. There were no impairment losses recognized for the fiscal years ended March 31, 2018 and 2019. The MUFG Group readjusted its future cash flow projection of the reporting units in this segment, considering the subsidiaries’ recent business performance. Due to the situation, the fair value of the reporting units, which were based on discounted future cash flows, fell below the carrying amounts of the reporting units. Accordingly, the second step of the goodwill impairment test was performed for the reporting units. As a result, the carrying amounts of the reporting units’ goodwill exceeded the implied fair value of the reporting units’ goodwill, and the impairment losses were recognized on the related goodwill. Other Intangible Assets The table below presents the gross carrying amount, accumulated amortization and net carrying amount, in total and by major class of other intangible assets at March 31, 2018 and 2019: 2018 2019 Gross Accumulated Net carrying Gross Accumulated Net (in millions) Intangible assets subject to amortization: Software ¥ 2,585,161 ¥ 1,852,333 ¥ 732,828 ¥ 2,703,413 ¥ 2,029,775 ¥ 673,638 Core deposit intangibles 128,679 83,382 45,297 126,796 88,643 38,153 Customer relationships 391,832 227,079 164,753 387,936 246,526 141,410 Trade names 77,821 30,801 47,020 77,204 34,283 42,921 Other 9,706 3,977 5,729 9,601 4,220 5,381 Total ¥ 3,193,199 ¥ 2,197,572 995,627 ¥ 3,304,950 ¥ 2,403,447 901,503 Intangible assets not subject to amortization: Other (1) 15,492 25,693 Total ¥ 1,011,119 ¥ 927,196 Note: (1) Intangible assets not subject to amortization includes ¥7,268 million and ¥17,431 million of mortgage servicing rights accounted for at fair value at March 31, 2018 and 2019, respectively. Intangible assets subject to amortization acquired during the fiscal year ended March 31, 2018 amounted to ¥242,017 million, which primarily consisted of ¥239,460 million of software and ¥2,200 million of customer relationships. The weighted average amortization periods for these assets are 5 years and 22 years, respectively. There is no significant residual value estimated for these assets. Intangible assets not subject to amortization acquired during the fiscal year ended March 31, 2018 amounted to ¥28 million. Intangible assets subject to amortization acquired during the fiscal year ended March 31, 2019 amounted to ¥262,700 million, which primarily consisted of ¥262,408 million of software. The weighted average amortization periods for these assets are 6 years. There is no significant residual value estimated for these assets. Intangible assets not subject to amortization acquired during the fiscal year ended March 31, 2019 amounted to ¥11,172 million. For the fiscal years ended March 31, 2017, 2018 and 2019, the MUFG Group recognized ¥5,803 million, ¥21,900 million and ¥118,108 million, respectively, of impairment losses for intangible assets whose carrying amounts exceeded their fair value. In computing the amount of impairment losses, fair value was determined primarily based on the present value of expected future cash flows, the estimated value based on appraisals, or market prices. The impairment loss for the fiscal year ended March 31, 2018 included a loss of ¥11,121 million relating to the foreign subsidiary’s customer relationships under the Trust Asset Business Group segment. The intangible assets were valued based on discounted expected future cash flows. The estimated future cash flows of the above customer relationships were revised downward due to a decrease in acquired customer base. Accordingly, the MUFG group revaluated the intangible assets and recognized impairment losses. The impairment loss for the fiscal year ended March 31, 2019 included a loss of ¥137,186 million relating to software held by certain consumer finance subsidiary under the Retail & Commercial Banking Business Group segment. The consumer finance subsidiary determined to fundamentally review its current system integration plan, comprehensively taking into account the scale, complexity and the degree of difficulty for the system development to respond rapid changes in payments market in an appropriate manner, at the meeting of the Board of Directors on March 25, 2019. The consumer finance subsidiary considered software under development unlikely to have cost reduction effect and remain in use in the future, and reevaluated the profitability of existing software in relation to its system integration plan. As a result, it was determined that carrying amounts of both system software under development and long lived assets group of credit business, including existing system software, land, buildings, and equipment and furniture exceeded their fair values, and ¥87,596 million and ¥28,494 million of impairment losses were recognized on system software under development and existing software, respectively. In computing the amount of impairment losses, the fair value was primarily estimated using an income approach. The income approach is based on the present value of expected cash flows, which represents market participant perspective. In addition to the impairments on software, ¥21,096 million of impairment losses on long-lived assets, including land, buildings, and equipment and furniture, were recognized. The estimated aggregate amortization expense for intangible assets for the next five fiscal years is as follows: (in millions) Fiscal year ending March 31: 2020 ¥ 230,962 2021 195,126 2022 160,504 2023 120,350 2024 83,523

Income Taxes _Text Block_

Income Taxes [Text Block]	12 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes [Text Block]	7. INCOME TAXES Income before Income Tax Expense Income before income tax expense by jurisdiction for the fiscal years ended March 31, 2017, 2018 and 2019 was as follows: 2017 2018 2019 (in millions) Domestic income (loss) ¥ (413,499 ) ¥ 803,057 ¥ 228,018 Foreign income 686,042 858,762 642,824 Total ¥ 272,543 ¥ 1,661,819 ¥ 870,842 Income Tax Expense (Benefit) The detail of current and deferred income tax expense (benefit) for the fiscal years ended March 31, 2017, 2018 and 2019 was as follows: 2017 2018 2019 (in millions) Current: Domestic ¥ 176,415 ¥ 180,109 ¥ 57,303 Foreign 130,406 107,119 123,730 Total 306,821 287,228 181,033 Deferred: Domestic (217,485 ) 116,873 (32,746 ) Foreign 5,117 3,722 (15,050 ) Total (212,368 ) 120,595 (47,796 ) Income tax expense 94,453 407,823 133,237 Income tax expense (benefit) reported in Accumulated OCI relating to: Investment securities 20,237 120,588 15,590 Debt valuation adjustments (3,926 ) (960 ) 4,293 Derivatives qualifying for cash flow hedges (9,443 ) (4,421 ) (1,845 ) Defined benefit plans 48,504 50,774 (38,229 ) Foreign currency translation adjustments (1,957 ) (34,527 ) 15,148 Total 53,415 131,454 (5,043 ) Total ¥ 147,868 ¥ 539,277 ¥ 128,194 The MUFG Group files tax returns on a consolidated basis for corporate income taxes within Japan. A consolidated basis for corporate income taxes results in the reporting of taxable income or loss based upon the combined profits or losses of the parent company and its wholly-owned domestic subsidiaries. In June 2016, the Tokyo Metropolitan Government Bureau of Taxation promulgated revisions to the local tax law. The revision reduces the effective statutory rate of corporate income tax from approximately 31.5% as of March 31, 2016 to 30.6% for the fiscal year beginning on or after April 1, 2017. The revision resulted in a decrease of ¥26,820 million in income tax expense for the fiscal year ended March 31, 2017. In the United States of America, on December 22, 2017, the Tax Cuts & Jobs Act was signed into law reducing the federal corporate income tax rate from 35% to 21% effective January 1, 2018. As a result of the reduction in the corporate income tax rate, the MUFG Group revalued its net deferred tax liabilities at March 31, 2018, resulting in a one-time Reconciliation of Effective Income Tax Rate Income taxes in Japan applicable to the MUFG Group are imposed by the national, prefectural and municipal governments, and in the aggregate resulted in a normal effective statutory rate of approximately 31.5%, 30.6%, and 30.6% for the fiscal years ended March 31, 2017, 2018 and 2019, respectively. Foreign subsidiaries are subject to income taxes of the countries in which they operate. A reconciliation of the effective income tax rates reflected in the accompanying consolidated statements of income to the combined normal effective statutory tax rates for the fiscal years ended March 31, 2017, 2018 and 2019 is as follows: 2017 2018 2019 Combined normal effective statutory tax rate 31.5 % 30.6 % 30.6 % Nondeductible expenses 2.0 0.2 0.5 Impairment of goodwill 0.8 — — Foreign tax credit and payments (9.6 ) (1.7 ) (3.3 ) Lower tax rates applicable to income of subsidiaries (0.2 ) (0.4 ) (2.5 ) Change in valuation allowance 25.4 (3.0 ) (1.4 ) Nontaxable dividends received (12.5 ) (2.0 ) (9.1 ) Undistributed earnings of subsidiaries 3.5 0.7 0.6 Tax and interest expense for uncertainty in income taxes (0.6 ) 0.0 0.6 Noncontrolling interest income 5.4 0.1 0.2 Effect of changes in tax laws (9.8 ) (0.6 ) 0.0 Other—net (1.2 ) 0.6 (0.9 ) Effective income tax rate 34.7 % 24.5 % 15.3 % Deferred Tax Assets and Liabilities Deferred tax assets and liabilities are computed for each tax jurisdiction using currently enacted tax rates applicable to periods when the temporary differences are expected to reverse. The tax effects of the items comprising the MUFG Group’s net deferred tax assets at March 31, 2018 and 2019 were as follows: 2018 2019 (in millions) Deferred tax assets: Allowance for credit losses ¥ 337,718 ¥ 301,222 Operating loss carryforwards 167,355 177,143 Loans 3,483 691 Accrued liabilities and other 133,728 236,363 Premises and equipment, including sale-and-leaseback 120,505 158,144 Derivative financial instruments 111,677 101,118 Defined benefit plans — 5,238 Valuation allowance (215,130 ) (218,191 ) Total deferred tax assets 659,336 761,728 Deferred tax liabilities: Investment securities (including trading account assets at fair value under the fair value option) 973,390 911,483 Intangible assets 52,396 38,772 Lease transactions 83,445 65,115 Defined benefit plans 15,484 — Other 119,970 280,701 Total deferred tax liabilities 1,244,685 1,296,071 Net deferred tax assets (liabilities) ¥ (585,349 ) ¥ (534,343 ) The valuation allowance was provided primarily against deferred tax assets recorded at MUFG and its subsidiaries with operating loss carryforwards. The valuation allowance is determined to reduce the measurement of deferred tax assets not expected to be realized. Management considers all available evidence, both positive and negative, to determine whether the valuation allowance is necessary based on the weight of that evidence. Management determines the amount of the valuation allowance based on future reversals of existing taxable temporary differences and future taxable income exclusive of reversing temporary differences. Future taxable income is developed from forecasted operating results, based on recent historical trends and approved business plans, the eligible carryforward periods and other relevant factors. For certain subsidiaries where strong negative evidence exists, such as the existence of significant amounts of operating loss carryforwards, cumulative losses and the expiration of unused operating loss carryforwards in recent years, a valuation allowance was recognized against the deferred tax assets as of March 31, 2018 and 2019 to the extent that it is more likely than not that they will not be realized. For the fiscal year ended March 31, 2018, the MUFG Group released a valuation allowance of ¥53,360 million which was mainly due to the commencement of a certain subsidiary’s application of the consolidated corporate-tax corporate-tax Income taxes are not provided on undistributed earnings of certain foreign subsidiaries that are considered to be indefinitely reinvested in the operations of such subsidiaries. At March 31, 2018 and 2019, the undistributed earnings of such foreign subsidiaries amounted to approximately ¥38,358 million and ¥48,103 million, respectively. Determination of the amount of unrecognized deferred tax liabilities with respect to these undistributed earnings is not practicable because of the complexity associated with its hypothetical calculation including foreign withholding taxes and foreign tax credits. MUFG has neither plans nor the intention to dispose of investments in such foreign subsidiaries and, accordingly, does not expect to record capital gains or losses, or otherwise monetize the undistributed earnings of such foreign subsidiaries. Furthermore, under the Japanese tax law, 95% of a dividend received from a foreign company in which a domestic company has held generally at least 25% of the outstanding shares for a continuous period of six months or more ending on the date on which the dividend is declared can be excluded from the domestic company’s taxable income. Therefore, if undistributed earnings of certain foreign subsidiaries are repatriated through dividends, only 5% of the amount of dividends will be included in taxable income. Operating Loss and Tax Credit Carryforwards At March 31, 2019, the MUFG Group had operating loss carryforwards for corporate tax of ¥527,882 million and tax credit carryforwards of ¥52,546 million for tax purposes. Such carryforwards, if not utilized, are scheduled to expire as follows: Operating loss Tax credit (in millions) Fiscal year ending March 31: 2020 ¥ 33,066 ¥ 700 2021 12,727 194 2022 23,346 230 2023 68,850 232 2024 105,110 182 2025 167,035 117 2026 and thereafter 95,686 46,239 No definite expiration date 22,062 4,652 Total ¥ 527,882 ¥ 52,546 Uncertainty in Income Tax The following is a roll-forward of the MUFG Group’s unrecognized tax benefits for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 (in millions) Balance at beginning of fiscal year ¥ 9,950 ¥ 7,851 ¥ 12,917 Gross amount of increases for current year’s tax positions 888 427 313 Gross amount of increases for prior years’ tax positions 1,014 6,642 8,836 Gross amount of decreases for prior years’ tax positions (95 ) (455 ) (1,090 ) Net amount of changes relating to settlements with tax authorities (39 ) (1,074 ) — Decreases due to lapse of applicable statutes of limitations (3,437 ) (253 ) (1,540 ) Foreign exchange translation and others (430 ) (221 ) (276 ) Balance at end of fiscal year ¥ 7,851 ¥ 12,917 ¥ 19,160 The total amounts of unrecognized tax benefits for the years ended March 31, 2017, 2018 and 2019 that, if recognized, would affect the effective tax rate are ¥1,443 million, ¥6,518 million and ¥14,092 million, respectively. The remainder of the uncertain tax positions have offsetting amounts in other jurisdictions or are temporary differences. The MUFG Group classifies interest and penalties, if applicable, related to income taxes as Income tax expense. Accrued interest and penalties (not included in the “unrecognized tax benefits” above) are a component of Other liabilities. The following is a roll-forward of the interest and penalties recognized in the accompanying consolidated financial statements for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 (in millions) Balance at beginning of fiscal year ¥ 4,727 ¥ 4,054 ¥ 4,564 Total interest and penalties in the consolidated statements of income (591 ) 694 (1,655 ) Total cash settlements, foreign exchange translation and others (82 ) (184 ) 147 Balance at end of fiscal year ¥ 4,054 ¥ 4,564 ¥ 3,056 The MUFG Group is subject to ongoing tax examinations by the tax authorities of the various jurisdictions in which it operates. The following are the major tax jurisdictions in which the MUFG Group operates and the status of years under audit or open to examination: Jurisdiction Tax years Japan 2018 and forward United States—Federal 2014 and forward United States—California 2015 and forward Thailand 2012 and forward Indonesia 2017 and forward The MUFG Group is currently under continuous examinations by the tax authorities in various domestic and foreign jurisdictions and many of these examinations are resolved every year. The unrecognized tax benefits will decrease since resolved items will be removed from the balance regardless of whether their resolution results in payment or recognition. It is reasonably possible that the unrecognized tax benefits will decrease by approximately ¥2.6 billion during the next twelve months.

Pledged Assets and Collateral _

Pledged Assets and Collateral [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Pledged Assets and Collateral [Text Block]	8. PLEDGED ASSETS AND COLLATERAL Pledged Assets At March 31, 2019, assets mortgaged, pledged, or otherwise subject to lien were as follows: 2019 (in millions) Trading account securities ¥ 8,921,825 Investment securities 7,907,010 Loans 14,192,075 Other 51,714 Total ¥ 31,072,624 The above pledged assets were classified by type of liabilities to which they related as follows: 2019 (in millions) Deposits ¥ 223,075 Payables under repurchase agreements and securities lending transactions 16,316,732 Other short-term borrowings and long-term debt 14,522,393 Other 10,424 Total ¥ 31,072,624 At March 31, 2019, certain investment securities, principally Japanese national government and Japanese government agency bonds, loans, and other assets with a combined carrying value of ¥19,875,392 million were pledged for acting as a collection agent of public funds, for settlement of exchange at the Bank of Japan and Japanese Banks’ Payment Clearing Network, for derivative transactions and for certain other purposes. The MUFG Group engages in on-balance Under Japanese law, Japanese banks are required to maintain certain reserves on deposit with the Bank of Japan based on the amount of deposit balances and certain other factors. There are similar reserve deposit requirements for foreign offices and subsidiaries engaged in banking businesses in foreign countries. At March 31, 2018 and 2019 the reserve funds required to be maintained by the MUFG Group, which are included in Cash and due from banks and Interest-earning deposits in other banks, were ¥2,679,482 million and ¥2,568,340 million, respectively. Collateral The MUFG Group accepts and provides financial assets as collateral for transactions, principally commercial loans, repurchase agreements and securities lending transactions, call money, and derivatives. Financial assets eligible for such collateral include, among others, marketable equity securities, trade and notes receivable and CDs. Secured parties, including creditors and counterparties to certain transactions with the MUFG Group, may sell or repledge financial assets provided as collateral. Certain contracts, however, may not be specific about the secured party’s right to sell or repledge collateral under the applicable statutes and, therefore, whether or not the secured party is permitted to sell or repledge collateral would differ depending on the interpretations of specific provisions of the existing statutes, contract or certain market practices. If the MUFG Group determines, based on available information, that a financial asset provided as collateral might not be sold or repledged by the secured parties, such collateral is not separately reported in the accompanying consolidated balance sheets. If a secured party is permitted to sell or repledge financial assets provided as collateral by contract or custom under the existing statutes, the MUFG Group reports such pledged financial assets separately on the face of the accompanying consolidated balance sheets. At March 31, 2019, the MUFG Group pledged ¥30,204 billion of assets that may not be sold or repledged by the secured parties. Certain banking subsidiaries accept collateral for commercial loans and certain banking transactions under a standardized agreement with customers, which provides that these banking subsidiaries may require the customers to provide collateral or guarantees with respect to the loans and other banking transactions. Financial assets pledged as collateral are generally negotiable and transferable instruments, and such negotiability and transferability are authorized by applicable legislation. In principle, Japanese legislation permits these banking subsidiaries to repledge financial assets accepted as collateral unless otherwise prohibited by contract or relevant statutes. Nevertheless, the MUFG Group did not sell or repledge nor does it plan to sell or repledge such collateral accepted in connection with commercial loans before a debtor’s default or other credit events specified in the agreements as it is not customary within the banking industry in Japan to dispose of collateral before a debtor’s default and other specified credit events. Derivative agreements commonly used in the marketplace do not prohibit a secured party’s disposition of financial assets received as collateral, and in resale agreements and securities borrowing transactions, securities accepted as collateral may be sold or repledged by the secured parties. At March 31, 2018 and 2019, the fair value of the collateral accepted by the MUFG Group that is permitted to be sold or repledged was ¥25,358 billion and ¥22,927 billion, respectively, of which ¥17,738 billion and ¥16,514 billion, respectively, was sold or repledged. At March 31, 2018 and 2019, the cash collateral pledged for derivative transactions, which is included in Other assets, was ¥1,473,109 million and ¥1,276,897 million, respectively, and the cash collateral received for derivative transactions, which is included in Other liabilities, was ¥1,158,053 million and ¥844,234 million, respectively.

Deposits _Text Block_

Deposits [Text Block]	12 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Deposits [Text Block]	9. DEPOSITS The balances of time deposits, including CDs, issued in amounts of ¥10 million (approximately U.S.$90 thousand at the Federal Reserve Bank of New York’s noon buying rate on March 29, 2019) or more with respect to domestic deposits and issued in amounts of U.S.$100,000 or more with respect to foreign deposits were ¥27,381,920 million and ¥22,386,612 million, respectively, at March 31, 2018, and ¥25,899,780 million and ¥23,858,381 million, respectively, at March 31, 2019. The maturity information at March 31, 2019 for domestic and foreign time deposits, including CDs, is summarized as follows: Domestic Foreign (in millions) Due in one year or less ¥ 33,351,324 ¥ 23,559,245 Due after one year through two years 4,987,763 1,145,596 Due after two years through three years 2,688,960 351,794 Due after three years through four years 539,629 146,985 Due after four years through five years 574,244 22,104 Due after five years 836,549 29,634 Total ¥ 42,978,469 ¥ 25,255,358

Call Money and Funds Purchased

Call Money and Funds Purchased [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Call Money and Funds Purchased [Text Block]	10. CALL MONEY AND FUNDS PURCHASED A summary of funds transactions for the fiscal years ended March 31, 2018 and 2019 is as follows: 2018 2019 (in millions, except percentages and days) Outstanding at end of fiscal year: Amount ¥ 2,452,543 ¥ 2,450,320 Principal range of maturities 1 day to 30 days 1 day to 30 days Weighted average interest rate 0.31 % 0.12 %

Due to Trust Account _Text Bloc

Due to Trust Account [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Due to Trust Account [Text Block]	11. DUE TO TRUST ACCOUNT Mitsubishi UFJ Trust and Banking holds assets on behalf of its customers in an agent, fiduciary or trust capacity. Such trust account assets are not the MUFG Group’s proprietary assets and are managed and accounted for separately. However, excess cash funds of individual trust accounts are often placed with Mitsubishi UFJ Trust and Banking which manages the funds together with its own funds in its proprietary account. Due to trust account reflects a temporary placement of the excess funds from individual trust accounts and, in view of the MUFG Group’s funding, due to trust account is similar to short-term funding, including demand deposits and other overnight funds purchased. The balance changes in response to the day-to-day 2018 2019 (in millions, except percentages) Amount outstanding at end of fiscal year ¥ 3,386,158 ¥ 2,735,952 Weighted average interest rate on outstanding balance at end of fiscal year 0.00 % 0.00 %

Short-term Borrowings and Long-

Short-term Borrowings and Long-term Debt [Text Block]	12 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Short-term Borrowings and Long-term Debt [Text Block]	12. SHORT-TERM BORROWINGS AND LONG-TERM DEBT At March 31, 2018 and 2019, the MUFG Group had unused lines of credit for financing amounting to ¥5,142,206 million and ¥5,525,069 million, respectively. The amounts principally consist of pooled collateral which are used to cover shortages in the Bank of Japan account and to meet liquidity needs. The MUFG Group may borrow from the Bank of Japan on demand up to the total amount of collateral eligible for credit extension. Other short-term borrowings at March 31, 2018 and 2019 were comprised of the following: 2018 2019 (in millions, except percentages) Domestic offices: Commercial paper ¥ 1,094,487 ¥ 1,033,568 Borrowings from the Bank of Japan 305,520 241,070 Borrowings from other financial institutions 243,968 227,482 Other 84,620 122,166 Total domestic offices 1,728,595 1,624,286 Foreign offices: Commercial paper 4,275,278 3,929,636 Borrowings from other financial institutions 784,949 967,901 Short-term debentures 18,523 68,492 Other 73,917 141,803 Total foreign offices 5,152,667 5,107,832 Total 6,881,262 6,732,118 Less unamortized discount 138 1,045 Other short-term borrowings—net ¥ 6,881,124 ¥ 6,731,073 Weighted average interest rate on outstanding balance at end of fiscal year 1.29 % 1.97 % Long-term debt (with original maturities of more than one year) at March 31, 2018 and 2019 was comprised of the following: 2018 2019 (in millions) MUFG: Obligations under capital leases ¥ 1,973 ¥ 1,725 Unsubordinated debt (1) Fixed rate bonds, payable in US dollars, due 2021-2039, principally 2.19%-4.29% 1,737,809 2,949,022 Fixed rate bonds, payable in Euro, due 2021-2033, principally 0.40%-1.75% 230,629 301,124 Fixed rate bonds, payable in other currencies, due 2025-2027, principally 3.55%-4.05% (2) 17,639 21,257 Floating rate bonds, payable in US dollars, due 2021-2023, principally 3.31%-4.51% 424,795 765,188 Floating rate bonds, payable in Euro, due 2023, principally 0.24% — 43,596 Total 2,410,872 4,080,187 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2024-2030, principally 0.37%-1.39% 482,662 618,925 Adjustable rate bonds, payable in Japanese yen, due 2024-2028, principally 0.30%-0.66% 795,944 890,359 Adjustable rate bonds, payable in Japanese yen, no stated maturity, principally 1.03%-4.42% 1,557,610 1,706,695 Adjustable rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.46%-0.50% 32,500 32,500 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 1.17%-4.78% 1,500 45,960 Floating rate bonds, payable in Japanese yen, no stated maturity, principally 3.00% 3,500 3,500 Floating rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.57%-0.79% 76,000 86,000 Total 2,949,716 3,383,939 Total 5,362,561 7,465,851 MUFG Bank: Obligations under capital leases ¥ 6,906 ¥ 7,704 Obligation under sale-and-leaseback 41,892 40,732 Unsubordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2019-2027, principally 0.22%-2.69% 346,800 234,500 Fixed rate bonds, payable in US dollars, due 2019-2049, principally 0.00%-4.70% 1,451,745 1,284,812 Fixed rate bonds, payable in Euro, due 2022-2037, principally 0.88%-2.06% 111,956 112,687 Fixed rate bonds, payable in other currencies, due 2021-2047, principally 0.00%-5.30% (2) 19,502 19,084 Fixed rate borrowings, payable in Japanese yen, due 2019-2028, principally 0.00%-0.25% 9,561,784 10,786,372 Fixed rate borrowings, payable in US dollars, due 2018, principally 7.49% 38 — Fixed rate borrowings, payable in Euro, due 2026, principally 0.00% 1,044 — Fixed rate borrowings, payable in other currencies, due 2030, principally 2.93% (2) — 9,483 Adjustable rate bonds, payable in US dollars, due 2030, principally 3.00% 1,062 1,110 Floating rate bonds, payable in US dollars, due 2018, principally 3.13% 53,120 — Floating rate borrowings, payable in US dollars, due 2019-2031, principally 2.64%-3.34% 1,071,239 1,008,949 Floating rate borrowings, payable in Euro, due 2021-2022, principally 0.00%-0.06% 20,150 15,382 Floating rate borrowings, payable in other currencies, due 2028, principally 3.23% (2) — 5,240 Total 12,638,440 13,477,619 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2019-2031, principally 1.31%-2.91% 520,350 513,420 Fixed rate borrowings, payable in Japanese yen, due 2022-2035, principally 0.37%-2.24% 98,400 73,400 Adjustable rate borrowings, payable in Japanese yen, due 2024-2028, principally 0.37%-2.56% 73,000 20,000 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 2.67%-4.78% 496,000 355,000 Floating rate borrowings, payable in Japanese yen, due 2027, principally 0.19% 15,000 15,000 Total 1,202,750 976,820 Obligations under loan securitization transaction accounted for as secured borrowings due 2019-2078, principally 0.13%-6.90% 622,061 639,037 Total 14,512,049 15,141,912 Other subsidiaries: Obligations under capital leases ¥ 9,835 ¥ 13,107 Unsubordinated debt (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2044, principally 0.00%-20.00% 3,453,352 1,291,537 Fixed rate borrowings, bonds and notes, payable in US dollars, due 2019-2037, principally 0.00%-34.00% 936,086 1,385,936 Fixed rate borrowings, bonds and notes, payable in Euro, due 2020-2026, principally 0.15%-1.28% 2,619 2,479 Fixed rate borrowings, bonds and notes, payable in Thai baht, due 2019-2025, principally 0.01%-7.15% 330,814 334,586 Fixed rate borrowings, bonds and notes, payable in other currencies, due 2019-2037, principally 0.00%-15.33% (2) 190,567 219,781 Floating/Adjustable rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2048, principally 0.00%-7.70% 1,342,318 1,425,387 Floating rate borrowings, bonds and notes, payable in US dollars, due 2019-2028, principally 0.00%-27.00% 186,515 244,253 Floating rate borrowings, bonds and notes, payable in other currencies, due 2019-2022, principally 1.43%-3.41% (2) 5,420 6,241 Total 6,447,691 4,910,200 Subordinated debt (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2030, principally 0.65%-2.61% 364,326 269,373 Fixed rate bonds and notes, payable in US dollars, due 2019-2027, principally 7.50%-10.85% 1,661 1,409 Fixed rate bonds and notes, payable in Thai baht, due 2020-2027, principally 3.40%-3.90% 144,900 143,212 Fixed rate bonds and notes, payable in other currencies, due 2021, principally 0.00% (2) 7,428 7,347 Adjustable rate borrowings, bonds and notes, payable in Japanese yen, no stated maturity, principally 2.83% 104,500 4,500 Floating rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2021, principally 0.53%-0.73% 72,493 41,000 Floating rate bonds and notes, payable in US dollars, due 2019-2036, principally 4.49%-11.86% 5,250 5,172 Total 700,558 472,013 Obligations under loan securitization transaction accounted for as secured borrowings due 2020-2022, principally 1.10%-2.20% 50,551 2,813 Total 7,208,635 5,398,133 Total 27,083,245 28,005,896 Debt Issuance Cost ¥ (13,689 ) ¥ (15,353 ) Total ¥ 27,069,556 ¥ 27,990,543 Notes: (1) Adjustable rate debts are debts where interest rates are reset in accordance with the terms of the debt agreements, and floating rate debts are debts where interest rates are repriced in accordance with movements of markets indices. (2) Minor currencies, such as Australian dollars, British pounds, Indonesian rupiah, Brazilian real, Russian ruble, etc, have been summarized into the “other currencies” classification. The MUFG Group uses derivative financial instruments to manage its interest rate and currency exposures for certain debts. The derivative financial instruments include swaps, forwards, options and other types of derivatives. As a result of these derivative instruments, the effective rates reflected in the table above may differ from the coupon rates. The interest rates for the adjustable and floating rate debt shown in the above table are those in effect at March 31, 2018 and 2019. Certain debt agreements permit the MUFG Group to redeem the related debt, in whole or in part, prior to maturity at the option of the issuer on terms specified in the respective agreements. The following is a summary of maturities of long-term debt subsequent to March 31, 2019: MUFG BK Other Total (in millions) Fiscal year ending March 31: 2020 ¥ 450 ¥ 1,551,272 ¥ 1,502,213 ¥ 3,053,935 2021 685,348 8,552,229 895,647 10,133,224 2022 1,172,368 2,166,840 720,272 4,059,480 2023 746,235 663,227 580,257 1,989,719 2024 265,873 315,828 414,380 996,081 2025 and thereafter 4,595,577 1,892,516 1,285,364 7,773,457 Total ¥ 7,465,851 ¥ 15,141,912 ¥ 5,398,133 ¥ 28,005,896 New Issuances of Bonds for Basel III For the fiscal year ended March 31, 2019, the MUFG Group issued to institutional investors in Japan ¥155,000 million aggregate principal amount of unsecured perpetual subordinated Additional Tier 1 notes. These notes are subject to the MUFG Group’s discretion to cease interest payments and a write-down of the principal upon the occurrence of certain events, including when the MUFG Group’s Common Equity Tier 1 ratio declines below 5.125%, when the MUFG Group is deemed to be at risk of becoming non-viable For the fiscal year ended March 31, 2019, the MUFG Group issued $13,220 million (approximately ¥1,467,288 million), €1,000 million (approximately ¥124,560 million) and HK$302 million (approximately ¥4,270 million) of bonds with an intent to count towards Total Loss-Absorbing Capacity (“TLAC”) to global institutional investors to meet the TLAC requirement under the standards issued by the Financial Stability Board (“FSB”). Under the FSB’s TLAC standard, the MUFG Group is required to hold TLAC debt in an amount not less than 16% of risk-weighted assets and 6% of the applicable Basel III leverage ratio denominator by January 1, 2019, and not less than 18% of risk-weighted assets and 6.75% of the applicable Basel III leverage ratio denominator by January 1, 2022.

Severance Indemnities and Pensi

Severance Indemnities and Pension Plans [Text Block]	12 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Severance Indemnities and Pension Plans [Text Block]	13. SEVERANCE INDEMNITIES AND PENSION PLANS Defined Benefit Pension Plans The MUFG Group has funded non-contributory MUFG Bank and certain domestic subsidiaries, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings, Mitsubishi UFJ NICOS and some subsidiaries of MUFG have non-contributory The MUFG Group also offers qualified and nonqualified defined benefit pension plans in foreign offices and subsidiaries for their employees. The qualified plans are non-contributory non-contributory Severance Indemnities Plans The MUFG Group has SIPs under which their employees in Japan, other than those who are directors, are entitled, under most circumstances, upon mandatory retirement at normal retirement age or earlier termination of employment, to lump-sum lump-sum Other Postretirement Plans The MUFG Group’s foreign offices and subsidiaries, primarily in the United States of America, provide their employees with certain postretirement medical and life insurance benefits (“other benefits”). Net periodic cost of pension benefits and other benefits for the fiscal years ended March 31, 2017, 2018 and 2019 include the following components: Domestic subsidiaries Foreign offices and subsidiaries 2017 2018 2019 2017 2018 2019 Pension Pension Pension Pension Other Pension Other Pension Other (in millions) Service cost—benefits earned during the fiscal year ¥ 49,057 ¥ 47,064 ¥ 48,352 ¥ 13,107 ¥ 990 ¥ 10,169 ¥ 676 ¥ 12,395 ¥ 525 Interest cost on projected benefit obligation 12,308 14,383 13,504 15,287 1,229 15,359 1,079 14,958 1,046 Expected return on plan assets (60,255 ) (68,432 ) (74,270 ) (29,339 ) (2,047 ) (32,110 ) (2,122 ) (33,266 ) (2,314 ) Amortization of net actuarial loss 17,764 7,309 731 12,707 1,366 8,847 1,124 9,993 707 Amortization of prior service cost (6,348 ) (1,094 ) (1,210 ) (2,045 ) (1,534 ) (3,090 ) (2,775 ) (3,039 ) (2,020 ) Loss (gain) on settlements and curtailment (1,765 ) (4,394 ) (5,980 ) (208 ) — 52 — 49 — Net periodic benefit cost (income) ¥ 10,761 ¥ (5,164 ) ¥ (18,873 ) ¥ 9,509 ¥ 4 ¥ (773 ) ¥ (2,018 ) ¥ 1,090 ¥ (2,056 ) As a result of adopting the new guidance issued in March 2017, as described in Note 1, the service cost component continues to be presented in Salaries and employee benefits while other components of net pension benefit/cost (i.e., Interest cost on projected benefit obligation, Expected return on plan assets, Amortization of net actuarial loss, Amortization of prior service cost, and Loss (gain) on settlements and curtailment disclosed in the above table) are now presented in Other non-interest The following table summarizes the assumptions used in computing the present value of the projected benefit obligations and the net periodic benefit cost: Domestic subsidiaries Foreign offices and subsidiaries 2017 2018 2019 2017 2018 2019 Pension Pension Pension Pension Other Pension Other Pension Other Weighted-average assumptions used: Discount rates in determining expense 0.68 % 0.82 % 0.76 % 3.90 % 3.03 % 3.52 % 3.61 % 3.19 % 3.27 % Discount rates in determining benefit obligation 0.82 0.76 0.61 3.81 3.86 3.38 3.43 3.87 3.99 Rates of increase in future compensation level for determining expense 3.23 3.23 3.21 4.65 — 4.65 — 4.65 — Rates of increase in future compensation level for determining benefit obligation 3.23 3.21 3.21 4.65 — 4.65 — 5.01 — Expected rates of return on plan assets 2.75 2.87 2.83 6.80 7.50 6.71 7.50 6.70 7.50 The following tables present the assumed health care cost trend rates for foreign offices and subsidiaries, which are used to measure the expected cost of benefits for the next year, and the effect of a one-percentage-point MUAH Other than MUAH 2018 (1) 2019 (1) 2018 (1) 2019 (1) Initial trend rate 4.44 % 4.44 % 7.00 % 7.00 % Ultimate trend rate 3.94 % 3.94 % 4.50 % 4.50 % Year the rate reaches the ultimate trend rate 2026 2027 2026 2027 MUAH Other than MUAH One-percentage- One-percentage- One-percentage- One-percentage- (in millions) Effect on total of service and interest cost components ¥ 183 ¥ (152 ) ¥ 44 ¥ (35 ) Effect on postretirement benefit obligation 3,110 (2,630 ) 812 (644 ) Note: (1) Fiscal years of MUFG Americas Holdings and foreign subsidiaries end on December 31. Therefore, the above tables present the rates and amounts at December 31, 2017 and 2018, respectively. The following table sets forth the combined funded status and amounts recognized in the accompanying consolidated balance sheets at March 31, 2018 and 2019: Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2018 2019 Non-contributory Non-contributory Pension Other Pension Other (in millions) Change in benefit obligation: Benefit obligation at beginning of fiscal year ¥ 1,793,848 ¥ 1,821,794 ¥ 478,463 ¥ 35,222 ¥ 502,056 ¥ 34,347 Service cost 47,064 48,352 10,169 676 12,395 525 Interest cost 14,383 13,504 15,359 1,079 14,958 1,046 Plan participants’ contributions — — 28 455 37 452 Acquisitions/ Divestitures (29 ) (160 ) — — (17 ) — Amendments — — — — 64 — Actuarial loss (gain) 49,678 43,527 25,519 506 (28,466 ) (2,354 ) Benefits paid (67,913 ) (66,539 ) (19,388 ) (2,520 ) (19,894 ) (2,221 ) Lump-sum (15,237 ) (18,594 ) (861 ) — (1,750 ) — Translation adjustments and other — — (7,233 ) (1,071 ) (10,303 ) (285 ) Benefit obligation at end of fiscal year 1,821,794 1,841,884 502,056 34,347 469,080 31,510 Change in plan assets: Fair value of plan assets at beginning of fiscal year 2,346,310 2,603,329 477,479 30,339 542,646 32,466 Actual return on plan assets 250,704 13,664 75,824 4,890 (21,353 ) (1,948 ) Employer contributions 74,181 44,427 16,969 190 3,117 102 Acquisitions/ Divestitures 47 (93 ) — — — — Plan participants’ contributions — — 28 455 37 452 Benefits paid (67,913 ) (66,539 ) (19,388 ) (2,520 ) (19,894 ) (2,221 ) Translation adjustments and other — — (8,266 ) (888 ) (11,058 ) (593 ) Fair value of plan assets at end of fiscal year 2,603,329 2,594,788 542,646 32,466 493,495 28,258 Amounts recognized in the consolidated balance sheets: Prepaid benefit cost ¥ 798,849 ¥ 770,564 ¥ 83,578 ¥ 2,552 ¥ 67,821 ¥ 1,372 Accrued benefit cost (17,314 ) (17,660 ) (42,988 ) (4,433 ) (43,406 ) (4,624 ) Net amount recognized ¥ 781,535 ¥ 752,904 ¥ 40,590 ¥ (1,881 ) ¥ 24,415 ¥ (3,252 ) The aggregated accumulated benefit obligations of these plans at March 31, 2018 and 2019 were as follows: Domestic Foreign offices 2018 2019 2018 2019 (in millions) Aggregated accumulated benefit obligations ¥ 1,784,837 ¥ 1,800,992 ¥ 475,522 ¥ 457,048 The projected benefit obligations, accumulated benefit obligations and fair value of plan assets for the plans with accumulated benefit obligations in excess of plan assets at March 31, 2018 and 2019 were as follows: Domestic Foreign offices 2018 2019 2018 2019 (in millions) Projected benefit obligations ¥ 22,445 ¥ 23,108 ¥ 62,511 ¥ 63,273 Accumulated benefit obligations 22,445 23,108 52,012 52,249 Fair value of plan assets 5,272 5,629 19,521 19,866 MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings, Mitsubishi UFJ NICOS and other subsidiaries paid special lump-sum The following table presents the amounts recognized in Accumulated OCI of the MUFG Group at March 31, 2018 and 2019: Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2018 2019 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss ¥ 135,656 ¥ 245,037 ¥ 111,820 ¥ 7,449 ¥ 126,238 ¥ 8,628 Prior service cost (6,669 ) (5,459 ) (17,936 ) (6,237 ) (14,536 ) (4,263 ) Gross amount recognized in Accumulated OCI 128,987 239,578 93,884 1,212 111,702 4,365 Taxes (81,747 ) (115,816 ) (25,251 ) (358 ) (29,875 ) (1,282 ) Net amount recognized in Accumulated OCI ¥ 47,240 ¥ 123,762 ¥ 68,633 ¥ 854 ¥ 81,827 ¥ 3,083 The following table presents OCI for the fiscal years ended March 31, 2018 and 2019: Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2018 2019 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss (gain) arising during the year ¥ (132,593 ) ¥ 104,132 ¥ (18,165 ) ¥ (2,262 ) ¥ 26,155 ¥ 1,908 Prior service cost arising during the year — — — — 65 — Losses (gains) due to amortization: Net actuarial loss (7,309 ) (731 ) (8,847 ) (1,124 ) (9,993 ) (707 ) Prior service cost 1,094 1,210 3,090 2,775 3,039 2,020 Curtailment and settlement 4,394 5,980 (52 ) — (49 ) — Foreign currency translation adjustments — — (3,502 ) (36 ) (1,399 ) (68 ) Total changes in Accumulated OCI ¥ (134,414 ) ¥ 110,591 ¥ (27,476 ) ¥ (647 ) ¥ 17,818 ¥ 3,153 The following table presents the expected amounts that will be amortized from Accumulated OCI as components of net periodic benefit cost, before taxes, for the fiscal year ending March 31, 2020: Domestic Foreign offices Pension Pension Other (in millions) Net actuarial loss ¥ 5,395 ¥ 7,731 ¥ 1,130 Prior service cost (1,269 ) (3,056 ) (1,916 ) Total ¥ 4,126 ¥ 4,675 ¥ (786 ) Investment policies MUFG’s investment policy for plan assets is based on an asset liability matching strategy which is intended to maintain adequate liquidity for benefit payments and to achieve a stable increase in the plan assets in the medium and long-term through proper risk control and return maximization. As a general rule, investment policies for plan assets are reviewed periodically for some plans and in the following situations for all plans: (1) large fluctuations in pension plan liabilities caused by modifications to pension plans, or (2) changes in the market environment. The plan assets allocation strategies are the principal determinant in achieving expected investment returns on the plan assets. Actual asset allocations may fluctuate within acceptable ranges due to market value variability. Plan assets are managed by a combination of internal and external asset management companies and are rebalanced when market fluctuations cause an asset category to fall outside of its strategic asset allocation range. Performance of each plan asset category is compared against established indices and similar plan asset groups to evaluate whether the risk associated with the portfolio is appropriate for the level of return. The weighted-average target asset allocation of plan assets for the pension benefits and other benefits at March 31, 2019 was as follows: Domestic Foreign offices Asset category Pension Pension Other Japanese equity securities 39.3 % 0.3 % — % Japanese debt securities 32.1 — — Non-Japanese 14.9 48.5 70.0 Non-Japanese 9.1 39.1 30.0 Real estate 1.3 9.9 — Short-term assets 3.3 2.2 — Total 100.0 % 100.0 % 100.0 % Basis and procedure for estimating long-term return of each asset category MUFG’s expected long-term rate of return on plan assets for domestic defined benefit pension plans and SIPs is based on a building-block methodology, which calculates the total long-term rate of return of the plan assets by aggregating the weighted rate of return derived from both long-term historical performance and forward-looking return expectations from each asset category. MUFG has determined the expected long-term rate of return for each asset category as follows: • Japanese equity securities: the rate for Japanese debt securities plus a premium for the risk associated with Japanese equity securities • Japanese debt securities: economic growth rate of Japan • Non-Japanese non-Japanese non-Japanese • Non-Japanese Foreign offices and subsidiaries periodically reconsider the expected long-term rate of return for their plan assets. They evaluate the investment return volatility of different asset categories and compare the liability structure of their pension and other benefits to those of other companies, while considering their funding policy to maintain a funded status sufficient to meet participants’ benefit obligations, and reduce long-term funding requirements and pension costs. Based on this information, foreign offices and subsidiaries update the expected long-term rate of return. Cash flows The MUFG Group expects to contribute to the plan assets for the fiscal year ending March 31, 2020 based upon its current funded status and expected asset return assumptions as follows: For the pension benefits of domestic subsidiaries ¥ 32.7 billion For the pension benefits of foreign offices and subsidiaries 0.7 billion For the other benefits of foreign offices and subsidiaries 0.4 billion Estimated future benefit payments The following table presents benefit payments expected to be paid, which include the effect of expected future service for the fiscal years indicated: Domestic Foreign offices Pension Pension Other (in millions) Fiscal year ending March 31: 2020 ¥ 84,558 ¥ 19,923 ¥ 1,997 2021 82,297 20,928 2,072 2022 82,320 21,903 2,129 2023 81,710 22,881 2,177 2024 81,684 23,726 2,205 Thereafter (2025-2029) 401,772 162,850 10,222 Fair value measurement of the plan assets The following is a description of the valuation methodologies used for plan assets measured at fair value as well as the classification of the plan assets pursuant to the fair value hierarchy described in Note 32: Government bonds and other debt securities When quoted prices are available in an active market, the MUFG Group adopts the quoted prices to measure the fair value of securities and such securities are classified in Level 1 of the fair value hierarchy. Level 1 securities include Japanese government bonds, most non-Japanese non-binding non-Japanese non-Japanese Marketable equity securities When quoted prices are available in an active market, the MUFG Group adopts the quoted prices to measure the fair value of marketable equity securities and such securities are classified in Level 1 of the fair value hierarchy. When quoted prices are available but not traded actively, such securities are classified in Level 2 of the fair value hierarchy. Japanese pooled funds Japanese pooled funds are investment fund vehicles designed for Japanese pension plan investments under Japanese pension trust fund regulations. Based upon the nature of the funds’ investments, Japanese pooled funds are categorized into four major fund types: Japanese marketable equity securities type, Japanese debt securities type, Non-Japanese Non-Japanese Other investment funds Other investment funds include mutual funds, private investments funds, common collective funds, private equity funds and real estate funds. The listed investment funds or mutual funds are valued at quoted prices and classified in Level 1 or Level 2 of the fair value hierarchy. When there is no available market quotation, the fair values are generally determined at net asset values per share (or its equivalent) as a practical expedient. Other investment funds classified in Level 3 of the fair value hierarchy consist of certain real estate funds whose fair values are not measured at their net asset values but by using significant unobservable inputs and there is inherent lack of the funds’ liquidity. Japanese general accounts of life insurance companies These instruments are contracts with life insurance companies that guarantee return of a certain level of fixed income, which are mainly invested in assets with low market risk such as Japanese debt securities. They are measured at conversion value and classified in Level 2 of the fair value hierarchy. Other investments Other investments mainly consist of call loans and the rest consist of miscellaneous accounts such as deposits with banks and short-term investments. These instruments are generally classified in Level 1 or Level 2 of the fair value hierarchy depending on observability of the inputs to measure their fair values. The following table presents the fair value of each major category of plan assets as of March 31, 2018 and 2019: Pension benefits and SIP Investments: At March 31, 2018 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 139,847 ¥ — ¥ — ¥ 139,847 ¥ — ¥ — ¥ — ¥ — Non-Japanese 15,552 944 — 16,496 17,945 4,081 — 22,026 Other debt securities 201 3,482 1,071 4,754 — 81,968 — 81,968 Japanese marketable equity securities 934,691 — — 934,691 887 — — 887 Non-Japanese 71,729 255 — 71,984 42,166 815 — 42,981 Other investment funds — — — — 99,798 9,997 — 109,795 (2) Japanese general account of life insurance companies (1) — 225,925 — 225,925 — — — — Other investments 3,485 23,195 — 26,680 2 4,867 155 5,024 Total ¥ 1,165,505 ¥ 253,801 ¥ 1,071 ¥ 1,420,377 ¥ 160,798 ¥ 101,728 ¥ 155 ¥ 262,681 At March 31, 2019 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 146,060 ¥ — ¥ — ¥ 146,060 ¥ — ¥ — ¥ — ¥ — Non-Japanese 8,570 656 — 9,226 38,687 4,615 — 43,302 Other debt securities 109 3,698 1,030 4,837 — 100,462 — 100,462 Japanese marketable equity securities 855,353 — — 855,353 — — — — Non-Japanese 64,957 234 — 65,191 20,569 652 — 21,221 Other investment funds — — — — 73,286 9,044 — 82,330 (2) Japanese general account of life insurance companies (1) — 222,460 — 222,460 — — — — Other investments 917 18,626 — 19,543 18 4,415 188 4,621 Total ¥ 1,075,966 ¥ 245,674 ¥ 1,030 ¥ 1,322,670 ¥ 132,560 ¥ 119,188 ¥ 188 ¥ 251,936 Notes: (1) “Japanese general accounts of life insurance companies” is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2017 to March 31, 2018 and 1.24% from April 1, 2018 to March 31, 2019. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds and real estate funds of ¥93,821 million and ¥516 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥68,556 million and nil, respectively, at December 31, 2018. The following table presents fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient that were excluded from the above table as of March 31, 2018 and 2019: Domestic subsidiaries Foreign offices and Assets category 2018 2019 2018 2019 (in millions) Japanese pooled funds: Japanese marketable equity securities ¥ 83,205 ¥ 109,915 ¥ — ¥ — Japanese debt securities 252,730 184,121 — — Non-Japanese 151,893 162,901 — — Non-Japanese 100,998 155,792 — — Other 135,275 134,306 — — Total pooled funds 724,101 747,035 — — Other investment funds 458,851 (1) 525,083 (1) 279,965 (2) 241,559 (2) Total ¥ 1,182,952 ¥ 1,272,118 ¥ 279,965 ¥ 241,559 Notes: (1) Other investment funds of the domestic subsidiaries include mutual funds and real estate funds of ¥433,221 million and ¥13,664 million, respectively, at March 31, 2018 and ¥500,850 million and ¥12,058 million, respectively, at March 31, 2019. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds, real estate funds and common collective funds of ¥63,088 million, ¥40,205 million and ¥158,249 million, respectively, at March 31, 2018 and ¥53,775 million, ¥46,818 million and ¥140,728 million, respectively, at March 31, 2019. Other debt securities and Japanese debt securities in the above Pension benefits and SIP tables include ¥982 million (0.03% of plan assets) of debt securities issued by the MUFG Group at March 31, 2018 and ¥1,224 million (0.04% of plan assets) at March 31, 2019, respectively. Japanese marketable equity securities in the above Pension benefits and SIP tables include ¥7,596 million (0.24% of plan assets) of common stock issued by the MUFG Group at March 31, 2018 and ¥5,414 million (0.18% of plan assets) at March 31, 2019, respectively. Other post retirement plan investments: Foreign offices and subsidiaries 2018 2019 Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Non-Japanese ¥ 2,523 ¥ — ¥ — ¥ 2,523 ¥ 1,705 ¥ — ¥ — ¥ 1,705 Other debt securities — 5,797 — 5,797 — 6,124 — 6,124 Non-Japanese — 7 — 7 — 6 — 6 Other investment funds (1) 6,082 — — 6,082 5,487 — — 5,487 Other investments 1 264 — 265 — 130 — 130 Total ¥ 8,606 ¥ 6,068 ¥ — ¥ 14,674 ¥ 7,192 ¥ 6,260 ¥ — ¥ 13,452 Note: (1) Other investment funds mainly consist of mutual funds. The following table presents fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient that were excluded from the above table as of March 31, 2018 and 2019: Foreign offices Assets category 2018 2019 (in millions) Other investment funds (1) ¥ 17,792 ¥ 14,806 Total ¥ 17,792 ¥ 14,806 Note: (1) Other investment funds of the foreign offices and subsidiaries include mutual funds, common collective funds and pooled separate accounts with variable life insurance policies of ¥553 million, ¥11,332 million and ¥5,907 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥147 million, ¥9,583 million and ¥5,076 million, respectively, at December 31, 2018. The following tables present a reconciliation of plan assets measured at fair value using significant unobservable inputs (Level 3) during the fiscal years ended March 31, 2018 and 2019: Pension benefits and SIP Investments: Domestic subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other debt securities ¥ 208 ¥ (6 ) ¥ (18 ) ¥ 887 ¥ — ¥ — ¥ 1,071 Other investment funds 206 36 — (242 ) — — — Total ¥ 414 ¥ 30 ¥ (18 ) ¥ 645 ¥ — ¥ — ¥ 1,071 Foreign offices and subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other investments ¥ 760 ¥ 51 ¥ (2 ) ¥ (654 ) ¥ — ¥ — ¥ 155 Total ¥ 760 ¥ 51 ¥ (2 ) ¥ (654 ) ¥ — ¥ — ¥ 155 Domestic subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other debt securities ¥ 1,071 ¥ 4 ¥ 49 ¥ (94 ) ¥ — ¥ — ¥ 1,030 Total ¥ 1,071 ¥ 4 ¥ 49 ¥ (94 ) ¥ — ¥ — ¥ 1,030 Foreign offices and subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other investments ¥ 155 ¥ — ¥ (3 ) ¥ 36 ¥ — ¥ — ¥ 188 Total ¥ 155 ¥ — ¥ (3 ) ¥ 36 ¥ — ¥ — ¥ 188 Defined Contribution Plans The MUFG Group maintains several qualified defined contribution plans in its domestic and foreign offices and subsidiaries, all of which are administered in accordance with applicable local laws and regulations. Each office and subsidiary matches eligible employee contributions up to a certain percentage of benefits-eligible compensation per pay period, subject to plan and legal limits. Terms of the plan, including matching percentage and vesting periods, are individually determined by each office and subsidiary. The cost of these defined contribution plans charged to operations for the fiscal years ended March 31, 2017, 2018 and 2019 was ¥15,636 million, ¥17,413 million and ¥17,859 million, respectively.

Other Assets and Liabilities _T

Other Assets and Liabilities [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Other Assets and Liabilities [Text Block]	14. OTHER ASSETS AND LIABILITIES Major components of other assets and liabilities at March 31, 2018 and 2019 were as follows: 2018 2019 (in millions) Other assets: Accounts receivable: Receivables from brokers, dealers and customers for securities transactions ¥ 1,017,194 ¥ 1,141,075 Other 1,190,885 1,394,794 Investments in equity method investees 2,219,196 2,487,389 Prepaid benefit cost (Note 13) 884,979 839,757 Cash collateral pledged for derivative transactions (Note 8) 1,473,109 1,276,897 Cash collateral for the use of Bank of Japan’s settlement infrastructure 851,066 911,528 Other 3,029,635 2,990,462 Total ¥ 10,666,064 ¥ 11,041,902 Other liabilities: Accounts payable: Payables to brokers, dealers and customers for securities transactions ¥ 1,247,652 ¥ 1,289,672 Other 1,357,387 1,308,733 Deferred tax liabilities 654,053 624,062 Allowance for off-balance 81,739 119,307 Accrued benefit cost (Note 13) 64,735 65,690 Guarantees and indemnifications 41,349 45,346 Cash collateral received for derivative transactions (Note 8) 1,158,053 844,234 Accrued and other liabilities 2,802,445 3,061,462 Total ¥ 7,407,413 ¥ 7,358,506 Investments in equity method investees include marketable equity securities carried at ¥1,627,896 million and ¥1,936,468 million at March 31, 2018 and 2019, respectively. Corresponding aggregated market values were ¥3,186,618 million and ¥2,702,838 million, respectively. Marketable equity securities include Morgan Stanley’s common stock carried at ¥1,206,998 million and ¥1,326,339 million at March 31, 2018 and 2019, respectively. As of March 31, 2019, the MUFG Group held approximately 24.01% of its common stock. Investments in equity method investees also include investments in Morgan Stanley MUFG Securities, Co., Ltd. at ¥174,459 million and ¥178,679 million at March 31, 2018 and 2019, respectively. The MUFG Group periodically evaluates whether a loss in value of investments in equity method investees is other-than-temporary. As a result of evaluations, the MUFG Group recognized other-than-temporary declines in the value of an investment and recorded impairment losses related to certain affiliated companies of ¥5,465 million, ¥29,442 million and ¥51,645 million for the fiscal years ended March 31, 2017, 2018 and 2019 respectively. The impairment losses are included in Equity in earnings of equity method investees—net in the accompanying consolidated statements of income. Summarized Financial Information of the MUFG Group’s Equity Method Investees Summarized financial information of Morgan Stanley, the largest portion of the MUFG Group’s equity method investees, as of March 31, 2018 and 2019, and for each of the three years ended March 31, 2019 is as follows: 2018 2019 (in billions) Trading assets ¥ 29,008 ¥ 29,392 Securities purchased under agreements to resell 8,525 10,718 Securities borrowed 14,431 15,416 Total assets 91,207 97,223 Deposits 17,043 19,948 Customer and other payables 20,709 21,431 Borrowings 20,713 21,165 Total liabilities 82,762 88,134 Noncontrolling interests 155 130 2017 2018 2019 (in billions) Net revenues ¥ 3,939 ¥ 4,354 ¥ 4,365 Total non-interest 2,871 3,133 3,170 Income from continuing operations before income taxes 1,068 1,221 1,195 Net income applicable to Morgan Stanley 730 759 944 Morgan Stanley early adopted the new accounting guidance on “Targeted Improvements to Accounting for Hedging Activities” on January 1, 2018. This resulted in recording a cumulative catch-up Summarized financial information of the MUFG Group’s equity method investees, other than Morgan Stanley as of March 31, 2018 and 2019, and for each of the three years ended March 31, 2019 is as follows: 2018 2019 (in billions) Net loans ¥ 14,343 ¥ 15,772 Total assets 26,008 28,910 Deposits 7,783 9,103 Total liabilities 21,209 23,423 Noncontrolling interests 1,009 1,135 2017 2018 2019 (in billions) Total interest income ¥ 777 ¥ 901 ¥ 1,036 Total interest expense 252 329 430 Net interest income 525 572 606 Provision for credit losses 97 136 157 Income before income tax expense 147 337 205 Net income 97 229 135

Offsetting of Derivatives, Repu

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block]	15. OFFSETTING OF DERIVATIVES, REPURCHASE AGREEMENTS, AND SECURITIES LENDING TRANSACTIONS The following tables present, as of March 31, 2018 and 2019, the gross and net amounts of the derivatives, resale and repurchase agreements, and securities borrowing and lending transactions, including the related gross amounts subject to an enforceable master netting arrangement or similar agreement not offset in the consolidated balance sheets. The MUFG Group primarily enters into International Swaps and Derivatives Association master netting agreements, master repurchase agreements and master securities lending agreements or similar agreements for derivative contracts, resale and repurchase agreements, and securities borrowing and lending transactions. In the event of default on or termination of any one contract, these agreements provide the contracting parties with the right to net a counterparty’s rights and obligations and to liquidate and setoff collateral against any net amount owed by the counterparty. Generally, as the MUFG Group has elected to present such amounts on a gross basis, the amounts subject to these agreements are included in “Gross amounts not offset in the consolidated balance sheet” column in the tabular disclosure below. For certain transactions where a legal opinion with respect to the enforceability of netting has not been sought or obtained, the related amounts are not subject to enforceable master netting agreements and not included in “Gross amounts not offset in the consolidated balance sheet” column in the tabular disclosure below. At March 31, 2018 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 12,585 ¥ — ¥ 12,585 ¥ (9,664 ) ¥ (832 ) ¥ 2,089 Receivables under resale agreements 8,825 (3,099 ) 5,726 (5,171 ) (17 ) 538 Receivables under securities borrowing transactions 9,305 (36 ) 9,269 (9,208 ) (1 ) 60 Total ¥ 30,715 ¥ (3,135 ) ¥ 27,580 ¥ (24,043 ) ¥ (850 ) ¥ 2,687 Financial liabilities: Derivative liabilities ¥ 11,877 ¥ — ¥ 11,877 ¥ (9,631 ) ¥ (1,126 ) ¥ 1,120 Payables under repurchase agreements 21,169 (3,034 ) 18,135 (17,890 ) (31 ) 214 Payables under securities lending transactions 8,206 (36 ) 8,170 (8,139 ) (12 ) 19 Obligations to return securities received as collateral 3,177 — 3,177 (1,072 ) — 2,105 Total ¥ 44,429 ¥ (3,070 ) ¥ 41,359 ¥ (36,732 ) ¥ (1,169 ) ¥ 3,458 At March 31, 2019 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 13,205 ¥ — ¥ 13,205 ¥ (10,752 ) ¥ (590 ) ¥ 1,863 Receivables under resale agreements 13,885 (2,910 ) 10,975 (9,793 ) (20 ) 1,162 Receivables under securities borrowing transactions 2,759 — 2,759 (2,693 ) — 66 Total ¥ 29,849 ¥ (2,910 ) ¥ 26,939 ¥ (23,238 ) ¥ (610 ) ¥ 3,091 Financial liabilities: Derivative liabilities ¥ 12,710 ¥ — ¥ 12,710 ¥ (10,671 ) ¥ (933 ) ¥ 1,106 Payables under repurchase agreements 28,125 (2,900 ) 25,225 (24,930 ) (15 ) 280 Payables under securities lending transactions 913 — 913 (880 ) — 33 Obligations to return securities received as collateral 3,087 — 3,087 (1,244 ) — 1,843 Total ¥ 44,835 ¥ (2,900 ) ¥ 41,935 ¥ (37,725 ) ¥ (948 ) ¥ 3,262

Repurchase Agreements, and Secu

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block]	16. REPURCHASE AGREEMENTS, AND SECURITIES LENDING TRANSACTIONS ACCOUNTED FOR AS SECURED BORROWINGS The following tables present gross obligations for payables under repurchase agreements, payables under securities lending transactions and obligations to return securities received as collateral by remaining contractual maturity and class of collateral pledged at March 31, 2018 and 2019. Potential risks associated with these arrangements primarily relate to market and liquidity risks. To manage risks associated with market exposure, the MUFG Group generally revalues the collateral underlying its repurchase agreements and securities lending transactions on a daily basis and monitors the value of the underlying securities, consisting of primarily high-quality securities such as Japanese national government and Japanese government agency bonds, and foreign government and official institution bonds. In the event the market value of such securities falls below the related agreements at contract amounts plus accrued interest, the MUFG Group may be required to deposit additional collateral when appropriate. To address liquidity risks, the MUFG Group conducts stress tests to ensure the adequate level of liquidity is maintained in the event of a decline in the fair value of any collateral pledged. March 31, 2018 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 2,290 ¥ 14,328 ¥ 2,004 ¥ 2,547 ¥ 21,169 Payables under securities lending transactions 4,647 2,343 1,216 — 8,206 Obligations to return securities received as collateral 2,855 202 120 — 3,177 Total ¥ 9,792 ¥ 16,873 ¥ 3,340 ¥ 2,547 ¥ 32,552 March 31, 2019 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 3,892 ¥ 18,586 ¥ 2,824 ¥ 2,823 ¥ 28,125 Payables under securities lending transactions 913 — — — 913 Obligations to return securities received as collateral 2,572 396 117 2 3,087 Total ¥ 7,377 ¥ 18,982 ¥ 2,941 ¥ 2,825 ¥ 32,125 Secured borrowing by the class of collateral pledged at March 31, 2018 and 2019 was as follows: March 31, 2018 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 2,462 ¥ 7,085 ¥ 1,242 ¥ 10,789 Foreign government and official institution bonds 14,316 36 1,344 15,696 Corporate bonds 570 — 84 654 Residential mortgage-backed securities 3,567 — — 3,567 Other debt securities 121 — — 121 Marketable equity securities 123 1,085 507 1,715 Others 10 — — 10 Total ¥ 21,169 ¥ 8,206 ¥ 3,177 ¥ 32,552 March 31, 2019 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 8,306 ¥ 21 ¥ 856 ¥ 9,183 Foreign government and official institution bonds 14,291 — 1,286 15,577 Corporate bonds 705 — 172 877 Residential mortgage-backed securities 4,369 — — 4,369 Other debt securities 238 — — 238 Marketable equity securities 200 892 772 1,864 Others 16 — 1 17 Total ¥ 28,125 ¥ 913 ¥ 3,087 ¥ 32,125

Preferred Stock _Text Block_

Preferred Stock [Text Block]	12 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Preferred Stock [Text Block]	17. PREFERRED STOCK Pursuant to the Articles of Incorporation, MUFG had been authorized to issue 400,000,000 shares of Class 5 Preferred Stock, 200,000,000 shares of Class 6 Preferred Stock, and 200,000,000 shares of Class 7 Preferred Stock without par value as of March 31, 2019. All classes of preferred stock are non-voting non-cumulative non-participating As of March 31, 2017, 2018 and 2019, there was no preferred stock outstanding and the entire amount of Capital stock on the consolidated balance sheets consisted of only common stock.

Common Stock and Capital Surplu

Common Stock and Capital Surplus [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Common Stock and Capital Surplus [Text Block]	18. COMMON STOCK AND CAPITAL SURPLUS The changes in the number of issued shares of common stock during the fiscal years ended March 31, 2017, 2018 and 2019 were as follows: 2017 2018 2019 (shares) Balance at beginning of fiscal year 14,168,853,820 14,168,853,820 13,900,028,020 Retirement of shares of common stock — (268,825,800 ) (232,257,500 ) Balance at end of fiscal year 14,168,853,820 13,900,028,020 13,667,770,520 Under the Companies Act, issuances of common stock, including conversions of bonds and notes, are required to be credited to the common stock account for at least 50% of the proceeds and to the legal capital surplus account (“legal capital surplus”) for the remaining amounts. The Companies Act permits Japanese companies, upon approval by the Board of Directors, to issue shares in the form of a “stock split,” as defined in the Companies Act. Also, prior to April 1, 1991, Japanese companies were permitted to issue free share distributions. MUFG Bank and Mitsubishi UFJ Trust and Banking from time to time made free share distributions. These free distributions usually ranged from 5% to 10% of outstanding common stock and publicly-owned corporations in the United States issuing shares in similar transactions would be required to account for them as stock dividends as of the shareholders’ record date by reducing retained earnings and increasing the appropriate capital accounts by an amount equal to the fair value of the shares issued. The application of such U.S. accounting practices to the cumulative free distributions made by MUFG Bank and Mitsubishi UFJ Trust and Banking at March 31, 2019, would have increased capital accounts by ¥1,910,106 million with a corresponding decrease in unappropriated retained earnings. The Companies Act permits that common stock, legal reserve, additional paid-in paid-in As for Capital surplus, the fee retained by MUFG’s subsidiary as underwriting compensation, net of stock issuance expense, was included in the total Capital surplus balance. Treasury Stock The Companies Act permits Japanese companies to effect purchases of their own shares pursuant to a resolution by the shareholders at an annual general meeting until the conclusion of the following ordinary general meeting of shareholders, and to hold such shares as their treasury stock indefinitely regardless of purpose. However, the Companies Act requires the amount of treasury stock purchased should be within the amount of retained earnings available for dividends. Disposition of treasury stock is subject to the approval of the Board of Directors and is to follow the procedures similar to a public offering of shares for subscription. From May 17, 2016 to June 13, 2016, MUFG repurchased 190,614,800 shares of MUFG’s common stock. These purchases were made through Off-Auction (ToSTNeT-3) From November 15, 2016 to December 22, 2016, MUFG repurchased 142,238,800 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥100 billion in aggregate in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 14, 2016. The repurchase plan, as authorized by the Board of Directors of MUFG, allowed for the repurchase of an aggregate amount of up to 230,000,000 shares, which represents the equivalent of 1.69% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥100 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. From May 16, 2017 to June 21, 2017 MUFG repurchased 141,158,900 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥100 billion in aggregate in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2017. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 200,000,000 shares, which represents the equivalent of 1.49% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥100 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On July 20, 2017, MUFG cancelled all the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2017. From November 15, 2017 to December 22, 2017, MUFG repurchased 127,666,900 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥100 billion, in aggregate, in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 14, 2017. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 200,000,000 shares, which represents the equivalent of 1.50% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥100 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On January 22, 2018, MUFG cancelled all of the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 14, 2017. From May 16, 2018 to June 4, 2018, MUFG repurchased 72,420,700 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥50 billion, in aggregate, in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2018. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 100,000,000 shares, which represents the equivalent of 0.76% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥50 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On July 20, 2018, MUFG cancelled all of the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2018. From November 14, 2018 to December 10, 2018, MUFG repurchased 159,836,800 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥100 billion, in aggregate, in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 13, 2018. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 200,000,000 shares, which represents the equivalent of 1.52% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥100 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On January 22, 2019, MUFG cancelled all of the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 13, 2018. Parent Company Shares Held by Subsidiaries and Affiliated Companies At March 31, 2019, certain subsidiaries and affiliated companies owned shares of common stock of MUFG. Such shares are included in treasury stock in the accompanying consolidated balance sheets and deducted from the MUFG’s shareholders’ equity.

Retained Earnings, Legal Reserv

Retained Earnings, Legal Reserve and Dividends [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Retained Earnings, Legal Reserve and Dividends [Text Block]	19. RETAINED EARNINGS, LEGAL RESERVE AND DIVIDENDS In addition to the Companies Act, Japanese banks, including MUFG Bank and Mitsubishi UFJ Trust and Banking, are required to comply with the Banking Law of Japan (the “Banking Law”). Legal Reserve Set Aside as Appropriation of Retained Earnings and Legal Capital Surplus Under the Companies Act The Companies Act provides that an amount at least equal to 10% of the aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash outlays applicable to each period shall be appropriated and set aside as a legal reserve until the aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus equals 25% of stated capital as defined in the Companies Act. Under the Banking Law The Banking Law provides that an amount at least equal to 20% of the aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash outlays applicable to each fiscal year shall be appropriated and set aside as a legal reserve until the aggregate amount of legal reserve set aside as appropriation of retained earnings and the legal capital surplus equals 100% of stated capital as defined in the Companies Act. Transfer of Legal Reserve Under the Companies Act Under the Companies Act, Japanese companies, including MUFG, were permitted, pursuant to a resolution by the shareholders at a general meeting, to make legal reserve set aside as appropriation of retained earnings and legal capital surplus available for dividends until the aggregate amount of the legal reserve and legal capital surplus equals 25% of stated capital as defined in the Companies Act. Under the Companies Act, Japanese companies, including MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking, are permitted, primarily pursuant to a resolution by the shareholders at a general meeting, to transfer legal capital surplus and legal reserve to stated capital and/or retained earnings without limitations of thresholds, thereby effectively removing the thresholds provided for in the Companies Act and Banking Law at the company’s discretion. Under the Banking Law Under the Banking Law, Japanese banks, including MUFG Bank and Mitsubishi UFJ Trust and Banking, were permitted, pursuant to a resolution by the shareholders at a general meeting, to set aside a legal reserve as an appropriation of retained earnings and legal capital surplus available for dividends until the aggregate amount of the legal reserve and legal capital surplus equals 100% of stated capital as defined in the Companies Act. Unappropriated Retained Earnings and Dividends In addition to the provision that requires an appropriation for legal reserve as described above, the Companies Act and the Banking Law impose certain limitations on the amount available for dividends. Under the Companies Act, the amount available for dividends is based on the amount recorded in MUFG’s general books of account maintained in accordance with accounting principles generally accepted in Japan (“Japanese GAAP”). The adjustments included in the accompanying consolidated financial statements but not recorded in MUFG’s general books of account, as explained in Note 1, have no effect on the determination of retained earnings available for dividends under the Companies Act. Under the Banking Law, MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking have to meet the minimum capital adequacy requirements and distributions of retained earnings of MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking, which are otherwise distributable to shareholders, are restricted in order to maintain the minimum capital requirements. MUFG, formerly known as Mitsubishi Tokyo Financial Group, was established on April 2, 2001 with common stock of ¥924,400 million, preferred stock of ¥222,100 million, legal capital surplus of ¥2,838,693 million and no retained earnings in accordance with the Commercial Code of Japan (“the Code”), which was replaced by the Companies Act, and Japanese GAAP. On October 1, 2005, MUFG started with common stock and preferred stock of ¥1,383,052 million, a legal capital surplus of ¥3,577,570 million and retained earnings of ¥757,458 million in accordance with the Code and Japanese GAAP. MUFG’s amount available for dividends, at March 31, 2019, was ¥4,221,793 million, which is based on the amount recorded in MUFG’s general books of account under Japanese GAAP. Annual dividends, including those for preferred stock, are approved by the shareholders at an annual general meeting held subsequent to the fiscal year to which the dividends are applicable. In addition, a semi-annual interim dividend payment may be made by resolution of the Board of Directors, subject to limitations imposed by the Companies Act and the Banking Law. In the accompanying consolidated statements of equity, dividends and appropriations to legal reserve shown for each fiscal year represent dividends approved and paid during the fiscal year and the related appropriation to legal reserve.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) [Text Block]	12 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss) [Text Block]	20. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table presents the changes in Accumulated OCI, net of tax and net of noncontrolling interests, for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 (in millions) Accumulated other comprehensive income (loss), net of taxes: Net unrealized gains (losses) on investment securities (1) Balance at beginning of fiscal year ¥ 1,995,314 ¥ 2,032,807 ¥ 2,270,346 Net change during the fiscal year 31,984 244,249 60,616 Effect of adopting new guidance by a foreign affiliated company — 118 — Effect of adopting new guidance on consolidation of certain variable interest entities (Note 26) 5,509 — — Effect of adopting new guidance on reclassification on certain tax effects — (6,828 ) — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities (Note 1) — — (2,700,331 ) Balance at end of fiscal year ¥ 2,032,807 ¥ 2,270,346 ¥ (369,369 ) Net debt valuation adjustments: Balance at beginning of fiscal year ¥ (2,080 ) ¥ (10,632 ) ¥ (16,488 ) Net change during the fiscal year (8,552 ) (2,178 ) 9,729 Effect of adopting new guidance on reclassification on certain tax effects — (3,678 ) — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities (Note 1) — — (1,911 ) Balance at end of fiscal year ¥ (10,632 ) ¥ (16,488 ) ¥ (8,670 ) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Balance at beginning of fiscal year ¥ 4,516 ¥ (8,729 ) ¥ (19,250 ) Net change during the fiscal year (13,245 ) (7,025 ) (4,890 ) Effect of adopting new guidance on reclassification on certain tax effects — (3,496 ) — Balance at end of fiscal year ¥ (8,729 ) ¥ (19,250 ) ¥ (24,140 ) Defined benefit plans: Balance at beginning of fiscal year ¥ (317,422 ) ¥ (214,062 ) ¥ (119,593 ) Net change during the fiscal year 103,360 109,012 (88,680 ) Effect of adopting new guidance on reclassification on certain tax effects — (14,543 ) — Balance at end of fiscal year ¥ (214,062 ) ¥ (119,593 ) ¥ (208,273 ) Foreign currency translation adjustments: Balance at beginning of fiscal year ¥ 620,931 ¥ 482,039 ¥ 362,300 Net change during the fiscal year (137,256 ) (119,213 ) (36,117 ) Effect of adopting new guidance on consolidation of certain variable interest entities (Note 26) (1,636 ) — — Effect of adopting new guidance on reclassification on certain tax effects — (526 ) — Balance at end of fiscal year ¥ 482,039 ¥ 362,300 ¥ 326,183 Balance at end of fiscal year ¥ 2,281,423 ¥ 2,477,315 ¥ (284,269 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019. The following table presents the before tax and net of tax changes in each component of Accumulated OCI for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 Before tax Tax Net of tax Before tax Tax Net of tax Before tax Tax Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities (1) ¥ 307,476 ¥ (107,082 ) ¥ 200,394 ¥ 631,154 ¥ (204,916 ) ¥ 426,238 ¥ 132,723 ¥ (24,690) ¥ 108,033 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (274,278 ) 86,845 (187,433 ) (280,258 ) 84,328 (195,930 ) (28,953 ) 9,100 (19,853 ) Net change 33,198 (20,237 ) 12,961 350,896 (120,588 ) 230,308 103,770 (15,590 ) 88,180 Net unrealized gains (losses) on investment securities attributable to noncontrolling interests (19,023 ) (13,941 ) 27,564 Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group 31,984 244,249 60,616 Net debt valuation adjustments: Net debt valuation adjustments (12,693 ) 3,994 (8,699 ) (3,555 ) 1,088 (2,467 ) 13,006 (3,982 ) 9,024 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 215 (68 ) 147 417 (128 ) 289 1,016 (311 ) 705 Net change (12,478 ) 3,926 (8,552 ) (3,138 ) 960 (2,178 ) 14,022 (4,293 ) 9,729 Net debt valuation adjustments attributable to noncontrolling interests — — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group (8,552 ) (2,178 ) 9,729 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized losses on derivatives qualifying for cash flow hedges (4,321 ) 2,041 (2,280 ) (3,430 ) 1,571 (1,859 ) (10,397 ) 2,825 (7,572 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests (18,367 ) 7,402 (10,965 ) (8,016 ) 2,850 (5,166 ) 3,662 (980 ) 2,682 Net change (22,688 ) 9,443 (13,245 ) (11,446 ) 4,421 (7,025 ) (6,735 ) 1,845 (4,890 ) Net unrealized gains on derivatives qualifying for cash flow hedges attributable to noncontrolling interests — — — Net unrealized losses on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group (13,245 ) (7,025 ) (4,890 ) Defined benefit plans: Defined benefit plans 131,971 (41,852 ) 90,119 154,708 (48,537 ) 106,171 (126,001 ) 37,655 (88,346 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 20,105 (6,652 ) 13,453 5,904 (2,237 ) 3,667 (1,168 ) 574 (594 ) Net change 152,076 (48,504 ) 103,572 160,612 (50,774 ) 109,838 (127,169 ) 38,229 (88,940 ) Defined benefit plans attributable to noncontrolling interests 212 826 (260 ) Defined benefit plans attributable to Mitsubishi UFJ Financial Group 103,360 109,012 (88,680 ) Foreign currency translation adjustments: Foreign currency translation adjustments (148,460 ) 2,424 (146,036 ) (137,811 ) 32,767 (105,044 ) (18,062 ) (17,932 ) (35,994 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 3,293 (467 ) 2,826 (1,494 ) 1,760 266 (9,002 ) 2,784 (6,218 ) Net change (145,167 ) 1,957 (143,210 ) (139,305 ) 34,527 (104,778 ) (27,064 ) (15,148 ) (42,212 ) Foreign currency translation adjustments attributable to noncontrolling interests (5,954 ) 14,435 (6,095 ) Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (137,256 ) (119,213 ) (36,117 ) Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group ¥ (23,709 ) ¥ 224,845 ¥ (59,342 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019. The following table presents the effect of the reclassification of significant items out of Accumulated OCI on the respective line items of the accompanying consolidated statements of income for the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale (1) ¥ (307,041 ) ¥ (287,279 ) ¥ (29,182 ) Investment securities gains Impairment losses on investment securities 32,744 6,759 596 Investment securities gains Other 19 262 (367 ) (274,278 ) (280,258 ) (28,953 ) Total before tax 86,845 84,328 9,100 Income tax expense ¥ (187,433 ) ¥ (195,930 ) ¥ (19,853 ) Net of tax Net debt valuation adjustments ¥ 215 ¥ 417 ¥ 1,016 Equity in earnings of equity 215 417 1,016 Total before tax (68 ) (128 ) (311 ) Income tax expense ¥ 147 ¥ 289 ¥ 705 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ (18,332 ) ¥ (7,782 ) ¥ 3,739 Interest income on Loans, Other (35 ) (234 ) (77 ) (18,367 ) (8,016 ) 3,662 Total before tax 7,402 2,850 (980 ) Income tax expense ¥ (10,965 ) ¥ (5,166 ) ¥ 2,682 Net of tax Defined benefit plans Net actuarial loss (2) ¥ 31,837 ¥ 17,280 ¥ 11,431 Other non-interest Prior service cost (2) (9,927 ) (6,959 ) (6,269 ) Other non-interest Gain on settlements and curtailment, and other (2) (1,805 ) (4,417 ) (6,330 ) Other non-interest 20,105 5,904 (1,168 ) Total before tax (6,652 ) (2,237 ) 574 Income tax expense ¥ 13,453 ¥ 3,667 ¥ (594 ) Net of tax 2017 2018 2019 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Foreign currency translation adjustments ¥ (39 ) ¥ (5,743 ) ¥ (9,004 ) Other non-interest income 3,332 4,249 2 Other non-interest expenses 3,293 (1,494 ) (9,002 ) Total before tax (467 ) 1,760 2,784 Income tax expense ¥ 2,826 ¥ 266 ¥ (6,218 ) Net of tax Total reclassifications for the period ¥ (269,032 ) ¥ (283,447 ) ¥ (34,445 ) Total before tax 87,060 86,573 11,167 Income tax expense ¥ (181,972 ) ¥ (196,874 ) ¥ (23,278 ) Net of tax Notes: (1) Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019 while included unrealized gains (losses) related to both debt and equity securities for the fiscal years ended March 31, 2017 and 2018. (2) These Accumulated OCI components are components of net periodic benefit cost. See Note 13 for more information.

Noncontrolling Interests _Text

Noncontrolling Interests [Text Block]	12 Months Ended
	Mar. 31, 2019
Noncontrolling Interest [Abstract]
Noncontrolling Interests [Text Block]	21. NONCONTROLLING INTERESTS Deconsolidation of Subsidiaries The gains and losses due to deconsolidation of subsidiaries were recognized under “Other non-interest non-interest Changes in MUFG’s Ownership Interests in Subsidiaries The following table presents the effect on MUFG’s shareholders’ equity from changes in ownership of subsidiaries resulting from transactions with the noncontrolling interest shareholders during the fiscal years ended March 31, 2017, 2018 and 2019: 2017 2018 2019 (in millions) Net income attributable to Mitsubishi UFJ Financial Group ¥ 202,680 ¥ 1,228,160 ¥ 718,645 Transactions between Mitsubishi UFJ Financial Group and the noncontrolling interest shareholders: Purchase of shares of Mitsubishi UFJ NICOS from noncontrolling interest shareholder (Note 2) — (34,751 ) — Other (429 ) 8,006 (78 ) Net transfers to the noncontrolling interest shareholders (429 ) (26,745 ) (78 ) Change from net income attributable to Mitsubishi UFJ Financial Group and transactions between Mitsubishi UFJ Financial Group and the noncontrolling interest shareholders ¥ 202,251 ¥ 1,201,415 ¥ 718,567

Regulatory Capital Requirements

Regulatory Capital Requirements [Text Block]	12 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Regulatory Capital Requirements [Text Block]	22. REGULATORY CAPITAL REQUIREMENTS Japan MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking and Mitsubishi UFJ Securities Holdings are subject to various regulatory capital requirements promulgated by the regulatory authorities of the countries in which they operate. Failure to meet minimum capital requirements will initiate certain mandatory actions by regulators that, if undertaken, could have a direct material effect on MUFG’s consolidated financial statements. In Japan, MUFG, MUFG Bank, and Mitsubishi UFJ Trust and Banking are subject to regulatory capital requirements promulgated by the Financial Services Agency of Japan (“FSA”) in accordance with the provisions of the Banking Law and related regulations. A banking institution is subject to the minimum capital requirements both on a consolidated basis and a stand-alone basis, and is required to maintain the minimum capital irrespective of whether it operates independently or as a subsidiary under the control of another company. When a bank holding company manages operations of its banking subsidiaries, it is required to maintain the minimum capital adequacy ratio on a consolidated basis in the same manner as its subsidiary banks. The FSA provides two sets of capital adequacy guidelines. One is a set of guidelines applicable to Japanese banks and bank holding companies with their foreign offices conducting international operations, as defined, and the other is applicable to Japanese banks and bank holding companies that are not engaged in international operations conducted by their foreign offices. The Basel Committee on Banking Supervision (“BCBS”) of the Bank for International Settlements (“BIS”) sets capital adequacy standards for all internationally active banks to ensure minimum levels of capital. The Basel Committee revised the 1988 Accord (“Basel I”) in June 2004 and released “International Convergence of Capital Measurement and Capital Standards: A Revised Framework” (“Basel II”). In addition, the Group of Central Bank Governors and Heads of Supervision reached an agreement on the new global regulatory framework, which has been referred to as “Basel III,” in July and September 2010. In December 2010, the Basel Committee agreed on the details of the Basel III rules. Effective as of March 31, 2013, Basel III was adopted by the FSA with transitional measures for Japanese banking institutions with international operations conducted by their foreign offices. MUFG calculated capital ratios as of March 31, 2018 and 2019 in accordance with Basel III. Capital Ratios Basel III, the same as Basel II, is based on “three pillars”: (1) minimum capital requirements, (2) the self-regulation of financial institutions based on supervisory review process, and (3) market discipline through the disclosure of information. The framework of the 1988 Accord, Basel I is improved and expanded to be included in “minimum capital requirements” as the first pillar of Basel II and Basel III. As for the denominator of the capital ratio, the Basel framework provides the following risk-based approaches and a range of options for determining risk-weighted assets. “Credit Risk” The Basel framework provides options for determining the risk-weighted assets for credit risk to allow banks to select approaches that are most appropriate for their level of risk assessment. Banks choose one of three approaches: “Standardized Approach,” “Foundation Internal Ratings-Based Approach” or “Advanced Internal Ratings-Based Approach (“AIRB”).” “Market Risk” In the “Amendment to the Capital Accord to incorporate market risks” of the year 1996, a choice between two methodologies “the Standardized Measurement Method” and “Internal Models Approach” is permitted. “Combination of Internal Models Approach and the Standardized Measurement Method” is also allowed under certain conditions. This is unchanged in Basel III. “Operational Risk” Operational risk, which is defined as the risk of loss resulting from inadequate or failed internal processes, people and systems or from external events, is newly added in Basel II. The Basel framework presents three methods for calculating operational risk capital charges: (i) the Basic Indicator Approach; (ii) the Standardized Approach; or (iii) Advanced Measurement Approaches (“AMA”). Banks adopt one of the three approaches to determine the risk-weighted assets for operational risk. Banks need to obtain approval from their supervisors prior to adopting the following approaches to calculate capital requirements for each risk: • the Advanced Internal Ratings-Based Approach for credit risk • the Internal Models Approach for market risk • the Standardized Approach and AMA for operational risk With approval from the FSA, MUFG and most of its major subsidiaries adopt AIRB to calculate capital requirements for credit risk, adopt the AMA to calculate capital requirements for operational risk, as for market risk, adopt the Internal Models Approach mainly to calculate general market risk and adopt the Standardized Measurement Method to calculate specific risk. The MUFG Group’s proprietary assets do not include trust assets under management and administration in a capacity of agent or fiduciary and, accordingly trust account assets are generally not included in the capital measure. However, guarantees for trust principal are counted as off-balance Under Basel III, as adopted by the FSA, MUFG’s risk-weighted assets increased, largely reflecting the new capital charge of the credit valuation adjustment (CVA), the credit risk related to asset value correlation multiplier for large financial institutions, and the 250% risk-weighted threshold items not deducted from Common Equity Tier 1 capital, as well as the conversion of certain Basel II capital deductions to risk-weighted assets, such as securitizations. On the other hand, as for the numerator of the capital ratio, there are three primary regulatory capital ratios used to assess capital adequacy, Common Equity Tier 1, Tier 1 and Total capital ratios, which are determined by dividing applicable capital components by risk-weighted assets. Tier 1 capital consists of Common Equity Tier 1 capital and Additional Tier 1 capital. Common Equity Tier 1 capital is primarily consisting of common stock, capital surplus, retained earnings, and Accumulated OCI. Regulatory adjustments including certain intangible fixed assets, such as goodwill, and defined-benefit pension fund assets, are made to Common Equity Tier 1. Additional Tier 1 capital generally consists of Basel III compliant preferred securities, and during the transition period, other capital that meets Tier 1 requirements under Basel II standards. Tier 2 capital generally consists of Basel III compliant subordinated debts, capital that meets Tier 2 requirements under Basel II standards during the transition period, certain allowances for credit losses, and noncontrolling interests in subsidiaries’ Tier 2 instruments. Total capital is defined as the sum of Tier 1 and Tier 2 capital. Effective March 31, 2016, the FSA’s capital conservation buffer, countercyclical buffer and the Global Systematically Important Bank (“G-SIB”), G-SIB Leverage Ratios The leverage ratio is designed for monitoring and preventing the build-up off-balance G-SIB G-SIB G-SIB The risk-adjusted capital amounts and ratios, and leverage ratios, of MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking presented in the following table are based on amounts calculated in accordance with Japanese GAAP as required by the FSA. Actual For capital Amount Ratio Amount Ratio (in millions, except percentages) Consolidated: At March 31, 2018: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,795,480 16.56 % ¥ 12,492,344 11.01 % BK 14,470,240 15.90 7,280,570 8.00 TB 2,545,648 20.03 1,016,420 8.00 Tier1 capital (to risk-weighted assets): MUFG (1) 16,251,749 14.32 10,223,072 9.01 BK 12,374,074 13.59 5,460,427 6.00 TB 2,245,853 17.67 762,315 6.00 Common Equity Tier1 capital (to risk-weighted assets): MUFG (1) 14,284,945 12.58 8,521,118 7.51 BK 10,788,381 11.85 4,095,321 4.50 TB 2,060,107 16.21 571,736 4.50 At March 31, 2019: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,769,793 16.03 % ¥ 14,097,771 12.04 % BK 14,632,620 14.42 8,114,105 8.00 TB 2,213,195 24.40 725,540 8.00 Tier1 capital (to risk-weighted assets): MUFG (1) 16,276,301 13.90 11,755,949 10.04 BK 12,639,454 12.46 6,085,579 6.00 TB 1,928,955 21.26 544,155 6.00 Common Equity Tier1 capital (to risk-weighted assets): MUFG (1) 14,322,407 12.23 9,999,582 8.54 BK 10,990,820 10.83 4,564,184 4.50 TB 1,775,565 19.57 408,116 4.50 Leverage ratio (2) MUFG 16,276,301 4.94 9,871,460 3.00 BK 12,639,454 4.63 8,189,494 3.00 TB 1,928,955 5.09 1,135,795 3.00 Stand-alone: At March 31, 2018: Total capital (to risk-weighted assets): BK ¥ 13,211,327 16.90 % ¥ 6,252,458 8.00 % TB 2,529,316 19.88 1,017,331 8.00 Tier1 capital (to risk-weighted assets): BK 11,344,078 14.51 4,689,344 6.00 TB 2,232,760 17.55 762,998 6.00 Common Equity Tier1 capital (to risk-weighted assets): BK 9,802,445 12.54 3,517,008 4.50 TB 2,057,760 16.18 572,249 4.50 At March 31, 2019: Total capital (to risk-weighted assets): BK ¥ 13,560,583 15.58 % ¥ 6,959,207 8.00 % TB 2,195,098 24.25 723,953 8.00 Tier1 capital (to risk-weighted assets): BK 11,773,839 13.53 5,219,405 6.00 TB 1,911,237 21.12 542,965 6.00 Common Equity Tier1 capital (to risk-weighted assets): BK 10,172,206 11.69 3,914,554 4.50 TB 1,758,237 19.42 407,224 4.50 Leverage ratio (2) BK 11,773,839 4.84 7,284,812 3.00 TB 1,911,237 5.55 1,031,484 3.00 Notes: (1) Effective March 31, 2016, the FSA’s capital conservation buffer, countercyclical buffer and G-SIB G-SIB G-SIB (2) Effective as of March 31, 2019, the minimum leverage ratio requirement was adopted by the FSA. Mitsubishi UFJ Morgan Stanley Securities and other securities subsidiaries in Japan and overseas are also subject to regulatory capital requirements of the countries or jurisdictions in which they operate. In Japan, the Financial Instruments and Exchange Act and related ordinance require financial instruments firms to maintain a minimum capital ratio of 120% calculated as a percentage of capital accounts less certain fixed assets, as determined in accordance with Japanese GAAP, against amounts equivalent to market, counterparty credit and operational risks. Specific guidelines are issued as a ministerial ordinance which details the definition of essential components of the capital ratios, including capital, deductible fixed asset items and risks, and related measures. Failure to maintain a minimum capital ratio will trigger mandatory regulatory actions. A capital ratio of less than 140% will call for regulatory reporting and a capital ratio of less than 100% may lead to a suspension of all or part of the business for a period of time and cancellation of a registration. At March 31, 2018, Mitsubishi UFJ Morgan Stanley Securities’s capital accounts less certain fixed assets of ¥446,539 million on a stand-alone basis and ¥473,296 million on a consolidated basis, were 291.2% and 293.2% of the total amounts equivalent to market, counterparty credit and operational risks, respectively. At March 31, 2019, its capital accounts less certain fixed assets of ¥446,609 million on a stand-alone basis and ¥469,272 million on a consolidated basis, were 331.6% and 332.2% of the total amounts equivalent to market, counterparty credit and operational risks, respectively. Management believes, as of March 31, 2019, that MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Morgan Stanley Securities and other regulated securities subsidiaries met all capital adequacy requirements to which they are subject. United States of America In the United States of America, MUFG Americas Holdings and its banking subsidiary MUFG Union Bank, N.A. (“MUFG Union Bank” or “BK(US)”), MUFG Bank’s largest subsidiaries operating outside Japan, are subject to various regulatory capital requirements administered by the U. S. Federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a material effect on MUFG Americas Holdings’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, MUFG Americas Holdings and MUFG Union Bank must meet specific capital guidelines that involve quantitative measures of MUFG Americas Holdings’s and MUFG Union Bank’s assets, liabilities, and certain off-balance Quantitative measures established by regulation to help ensure capital adequacy require MUFG Americas Holdings and MUFG Union Bank to maintain minimum amounts and ratios (set forth in the tables below) of Total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined) and of Tier 1 capital (as defined) to quarterly average assets (as defined). In July 2013, the Board of Governors of the Federal Reserve System and the other U.S. Federal banking agencies adopted final rules making significant changes to the U.S. regulatory capital framework for U.S. banking organizations (U.S. Basel III). The final rules are intended to conform this framework to the BCBS’ current international regulatory capital accord (Basel III). These rules replace the U.S. Federal banking agencies’ general risk-based capital rules (commonly known as “Basel I”), advanced approaches rules (commonly known as “Basel II”) that are applicable to certain large banking organizations (including MUFG Union Bank), and leverage rules, and are subject to certain transition provisions. Among other requirements, the U.S. Basel III rules revise the definition of capital, increase minimum capital ratios, and introduce a minimum Common Equity Tier 1 capital ratio of 4.5% and a capital conservation buffer of 2.5% (for a total minimum Common Equity Tier 1 capital ratio of 7.0%) and a potential countercyclical buffer of up to 2.5%, which would be imposed by regulators at their discretion if it is determined that a period of excessive credit growth is contributing to an increase in financial institution systemic risk; mandate a Tier 1 leverage ratio of 4% and introduce, for large and internationally active bank holding companies, a Tier 1 Supplementary Leverage Ratio that is currently set at 3% and which incorporates off-balance phase-in As a result of the Federal Reserve’s approval of MUFG Americas Holdings’s request to opt out of the advanced approaches methodology in the fourth quarter of 2014, MUFG Americas Holdings calculated its regulatory capital ratios under U.S. Basel I rules at December 31, 2014 and became subject to the U.S. Basel III standardized approach on January 1, 2015, with certain provisions subject to phase-in one-time off-balance As required under U.S. Basel III rules, the 2.5% capital conservation buffer is being implemented on a phased-in phased-in The figures on the table below are calculated according to U.S. Basel III as of December 31, 2017 and 2018. MUFG Americas Holdings’s actual capital amounts and ratios are presented as follows: Actual Minimum capital (1) Amount Ratio Amount Ratio (in millions, except percentages) MUAH: At December 31, 2017: Total capital (to risk-weighted assets) $ 17,106 17.76 % $ 8,910 9.250 % Tier 1 capital (to risk-weighted assets) 15,708 16.31 6,984 7.250 Tier 1 capital (to quarterly average assets) (2) 15,708 10.06 6,245 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 15,708 16.31 5,539 5.750 At December 31, 2018: Total capital (to risk-weighted assets) $ 14,904 14.60 % $ 10,081 9.875 % Tier 1 capital (to risk-weighted assets) 14,256 13.96 8,039 7.875 Tier 1 capital (to quarterly average assets) (2) 14,256 8.77 6,502 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 14,256 13.96 6,508 6.375 Notes: (1) The minimum capital requirement includes a capital conservation buffer of 1.250% at December 31, 2017 and 1.875% at December 31, 2018. (2) Excludes certain deductions. The figures on the table below are calculated according to U.S. Basel III as of December 31, 2017 and 2018. MUFG Union Bank’s actual capital amounts and ratios are presented as follows: Actual Minimum capital (1) Ratios OCC Amount Ratio Amount Ratio Amount Ratio (in millions, except percentages) BK(US): At December 31, 2017: Total capital (to risk-weighted assets) $ 15,335 17.68 % $ 8,023 9.250 % $ 8,673 10.00 % Tier 1 capital (to risk-weighted assets) 14,028 16.17 6,288 7.250 6,938 8.00 Tier 1 capital (to quarterly average assets) (2) 14,028 11.78 4,762 4.000 5,953 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 14,028 16.17 4,987 5.750 5,637 6.50 At December 31, 2018: Total capital (to risk-weighted assets) $ 13,905 15.09 % $ 9,102 9.875 % $ 9,217 10.00 % Tier 1 capital (to risk-weighted assets) 13,316 14.45 7,258 7.875 7,374 8.00 Tier 1 capital (to quarterly average assets) (2) 13,316 10.61 5,018 4.000 6,273 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 13,316 14.45 5,876 6.375 5,991 6.50 Notes: (1) Beginning January 1, 2017 and 2018, the minimum capital requirement includes a capital conservation buffer of 1.250% and 1.875%, respectively. (2) Excludes certain deductions. Management believes, as of December 31, 2018, that MUFG Americas Holdings and MUFG Union Bank met all capital adequacy requirements to which they are subject. As of December 31, 2017 and 2018, the notification from the OCC categorized MUFG Union Bank as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized,” MUFG Union Bank must maintain a minimum total risk-based capital ratio of 10% as of December 31, 2017 and 2018, a Tier 1 risk-based capital ratio of 8% as of December 31, 2017 and 2018, a Tier 1 capital to quarterly average assets of 5% as of December 31, 2017 and 2018, and Common Equity Tier 1 risk-based capital ratio of 6.5% as of December 31, 2017 and 2018, as set forth in the table. There are no conditions or events since that notification that management believes have changed MUFG Union Bank’s category.

Earnings Per Common Share Appli

Earnings Per Common Share Applicable to Common Shareholders of MUFG [Text Block]	12 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Common Share Applicable to Common Shareholders of MUFG [Text Block]	23. EARNINGS PER COMMON SHARE APPLICABLE TO COMMON SHAREHOLDERS OF MUFG Reconciliations of net income and weighted average number of common shares outstanding used for the computation of basic EPS to the adjusted amounts for the computation of diluted EPS for the fiscal years ended March 31, 2017, 2018 and 2019 are as follows: 2017 2018 2019 (in millions) Income (Numerator): Net income attributable to Mitsubishi UFJ Financial Group ¥ 202,680 ¥ 1,228,160 ¥ 718,645 Effect of dilutive instruments: Stock acquisition rights and restricted stock units—Morgan Stanley (3,212 ) (3,826 ) (3,745 ) Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions ¥ 199,468 ¥ 1,224,334 ¥ 714,900 2017 2018 2019 (thousands of shares) Shares (Denominator): Weighted average common shares outstanding 13,574,314 13,291,842 13,058,698 Effect of dilutive instruments: Stock acquisition rights and the common shares of MUFG under the Board Incentive Plan (1) 10,571 1,650 484 Weighted average common shares for diluted computation 13,584,885 13,293,492 13,059,182 2017 2018 2019 (in yen) Earnings per common share applicable to common shareholders of Mitsubishi UFJ Financial Group: Basic earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group ¥ 14.93 ¥ 92.40 ¥ 55.03 Diluted earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group (1) ¥ 14.68 ¥ 92.10 ¥ 54.74 Note: (1) For the fiscal year ended March 31, 2019, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Derivative Financial Instrument

Derivative Financial Instruments [Text Block]	12 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments [Text Block]	24. DERIVATIVE FINANCIAL INSTRUMENTS The MUFG Group uses various derivative financial instruments both for trading purposes and for purposes other than trading (primarily risk management purposes) in the normal course of business to meet the financial needs of its customers, as a source of revenue and to manage its exposures to a variety of risks. Market risk is the possibility that future changes in market indices make the financial instruments less valuable. The MUFG Group is a party to derivative financial instruments, including swaps, forwards, options and other types of derivatives, dealing primarily with market risk associated with interest rates, foreign currencies, equity and commodity prices, and credit risk associated with counterparty’s nonperformance of transactions. Credit risk is the possibility that a loss may result from a counterparty’s failure to perform according to the terms and conditions of the contract, which may exceed the value of underlying collateral. To reduce credit risk, the MUFG Group may require collateral or guarantees based on a case-by-case Trading Activities The MUFG Group’s trading activities include dealing and customer accommodation activities. As part of its trading activities, the MUFG Group offers a variety of derivative financial instruments for managing interest rate and foreign exchange risk to its domestic and foreign corporate and financial institution customers. The MUFG Group also enters into other types of derivative transactions, including equity and credit-related contracts, for its own account. Risk Management Activities As part of the MUFG Group’s risk management activities, asset and liability management is viewed as one of the methods for the MUFG Group to manage its interest rate exposures on interest-bearing assets and liabilities. The MUFG Group uses certain derivative financial instruments in order to minimize significant unplanned fluctuations in earnings that are caused by interest rate volatility. For example, an increase or a decrease in interest income and interest expense on hedged variable rate assets and liabilities as a result of interest rate fluctuations are expected to be substantially offset by the variability in earnings by gains and losses on the derivative instruments that are linked to these hedged assets and liabilities. The MUFG Group enters into interest rate swaps and other contracts primarily to manage the interest rate risk of its loans, investment securities and deposit liabilities. Interest rate contracts, which are generally non-leveraged The MUFG Group enters into forward exchange contracts, currency swaps and other contracts in response to currency exposures resulting from on-balance Derivatives Designated as Hedges The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered by MUFG Americas Holdings whose fiscal period ends on December 31. Cash Flow Hedges At December 31, 2018, MUFG Americas Holdings used interest rate floors with a notional amount of ¥55.5 billion and interest rate swaps with a notional amount of ¥19.3 billion to hedge the risk of changes in cash flows attributable to changes in the designated benchmark interest rate on LIBOR indexed loans and LIBOR indexed short-term borrowings, respectively. At December 31, 2018, the weighted average remaining life of active cash flow hedges was 2.6 years. For cash flow hedges, the effective portion of the gain or loss on the hedging instruments is reported as a component of OCI and reclassified into earnings in the same period or periods during which the hedged cash flows are recognized in net interest income. Gains and losses representing hedge ineffectiveness are recognized in non-interest Fair Value Hedges MUFG Americas Holdings engaged in an interest rate hedging strategy in which one or more interest rate swaps were associated with a specified interest bearing liability, in order to convert the liability from a fixed rate to a floating rate instrument. This strategy mitigated the changes in fair value of the hedged liability caused by changes in the designated benchmark interest rate, LIBOR. For fair value hedges, any ineffectiveness is recognized in non-interest Notional Amounts of Derivative Contracts The following table summarizes the notional amounts of derivative contracts at March 31, 2018 and 2019: Notional amounts (1) 2018 2019 (in trillions) Interest rate contracts ¥ 1,219.7 ¥ 1,409.6 Foreign exchange contracts 220.8 230.5 Equity contracts 6.1 6.4 Commodity contracts 0.3 0.2 Credit derivatives 6.5 7.2 Others 3.1 3.0 Total ¥ 1,456.5 ¥ 1,656.9 Note: (1) Includes both written and purchased positions. Impact of Derivatives on the Consolidated Balance Sheets The following table summarizes fair value information on derivative instruments that are recorded on the MUFG Group’s consolidated balance sheets at March 31, 2018 and 2019: Fair value of derivative instruments 2018 (1)(5) 2019 (1)(5) Not designated (2) Designated (3) Total (4) Not designated (2) Designated (3) Total (4) (in billions) Derivative assets: Interest rate contracts ¥ 8,712 ¥ — ¥ 8,712 ¥ 10,108 ¥ 1 ¥ 10,109 Foreign exchange contracts 3,557 — 3,557 2,795 — 2,795 Equity contracts 207 — 207 188 — 188 Commodity contracts 35 — 35 27 — 27 Credit derivatives 72 — 72 84 — 84 Others 2 — 2 2 — 2 Total derivative assets ¥ 12,585 ¥ — ¥ 12,585 ¥ 13,204 ¥ 1 ¥ 13,205 Derivative liabilities: Interest rate contracts ¥ 8,674 ¥ 17 ¥ 8,691 ¥ 9,896 ¥ — ¥ 9,896 Foreign exchange contracts 3,000 — 3,000 2,671 — 2,671 Equity contracts 227 — 227 183 — 183 Commodity contracts 33 — 33 27 — 27 Credit derivatives 71 — 71 69 — 69 Others (6) (145 ) — (145 ) (136 ) — (136 ) Total derivative liabilities ¥ 11,860 ¥ 17 ¥ 11,877 ¥ 12,710 ¥ — ¥ 12,710 Notes: (1) The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts. (2) The derivative instruments which are not designated as a hedging instrument are held for trading and risk management purposes, and are presented in Trading account assets/liabilities except for (6). (3) The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by MUFG Americas Holdings. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying consolidated balance sheets. (4) This table does not include contracts with embedded derivatives for which the fair value option has been elected. (5) For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 32. (6) Others include mainly bifurcated embedded derivatives carried at fair value, which are presented in Deposits and Long-term debt. Impact of Derivatives and Hedged Items on the Consolidated Statements of Income and Accumulated OCI The following tables provide more detailed information regarding the derivative-related impact on the accompanying consolidated statements of income and Accumulated OCI by accounting designation for the fiscal years ended March 31, 2017, 2018 and 2019: Gains and losses for trading and risk management derivatives (not designated as hedging instruments) Trading and risk management derivatives gains and losses 2017 2018 2019 Foreign Trading Total Foreign Trading Total Foreign Trading Total (in billions) Interest rate contracts ¥ — ¥ (137 ) ¥ (137 ) ¥ — ¥ 51 ¥ 51 ¥ — ¥ 6 ¥ 6 Foreign exchange contracts (183 ) — (183 ) (163 ) — (163 ) (347 ) — (347 ) Equity contracts — (153 ) (153 ) — (260 ) (260 ) — 80 80 Commodity contracts — 2 2 — 6 6 — — — Credit derivatives — 18 18 — (2 ) (2 ) — (40 ) (40 ) Others — (55 ) (55 ) 3 (22 ) (19 ) (7 ) (70 ) (77 ) Total ¥ (183 ) ¥ (325 ) ¥ (508 ) ¥ (160 ) ¥ (227 ) ¥ (387 ) ¥ (354) ¥ (24 ) ¥ (378 ) Gains and losses for derivatives designated as cash flow hedges 2017 2018 2019 (in billions) Losses recognized in Accumulated OCI on derivative instruments (Effective portion) Interest rate contracts ¥ (3 ) ¥ (4 ) ¥ (11 ) Total ¥ (3 ) ¥ (4 ) ¥ (11 ) Gains (losses) reclassified from Accumulated OCI into income (Effective portion) Interest rate contracts (1) ¥ 18 ¥ 8 ¥ (4 ) Total ¥ 18 ¥ 8 ¥ (4 ) Note: (1) Included in Interest income. Embedded Derivatives Features embedded in other non-derivative Credit Derivatives The MUFG Group enters into credit derivatives to manage its credit risk exposure, to facilitate client transactions, and for proprietary trading purposes, under which they provide the counterparty protection against the risk of default on a set of debt obligations issued by a specified reference entity or entities. Types of such credit derivatives primarily include single name credit default swaps, index and basket credit default swaps. The MUFG Group will have to perform under a credit derivative if a credit event as defined under the contract occurs. Such credit events include bankruptcy, dissolution or insolvency of the referenced entity, default and restructuring of the obligations of the referenced entity. The MUFG Group’s counterparties are banks, broker-dealers, insurance and other financial institutions. The contractual or notional amounts of these credit derivatives represent the maximum potential amounts of future payments without consideration of possible recoveries under recourse provisions or from collateral held or pledged. The table below summarizes certain information regarding protection sold through credit derivatives as of March 31, 2018 and 2019: Protection sold Maximum potential/Notional amount Fair value At March 31, 2018: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 440,610 ¥ 1,199,269 ¥ 85,094 ¥ 1,724,973 ¥ (33,389 ) Non-investment 168,102 259,497 4,775 432,374 (3,431 ) Not rated — 45,425 — 45,425 8 Total 608,712 1,504,191 89,869 2,202,772 (36,812 ) Index and basket credit default swaps held by BK: Investment grade (2) 3,000 118,359 37,781 159,140 (3,381 ) Non-investment 7,000 82,867 — 89,867 (1,311 ) Total 10,000 201,226 37,781 249,007 (4,692 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 15,000 108,000 6,000 129,000 (2,641 ) Non-investment 12,000 29,000 — 41,000 (749 ) Not rated 42,439 260,951 1,863 305,253 (16,294 ) Total 69,439 397,951 7,863 475,253 (19,684 ) Total index and basket credit default swaps sold 79,439 599,177 45,644 724,260 (24,376 ) Total credit default swaps sold 688,151 2,103,368 135,513 2,927,032 (61,188 ) Other credit derivatives sold (3) Investment grade — 74,368 — 74,368 (24 ) Total credit derivatives ¥ 688,151 ¥ 2,177,736 ¥ 135,513 ¥ 3,001,400 ¥ (61,212 ) Protection sold Maximum potential/Notional amount Fair value At March 31, 2019: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 378,527 ¥ 1,603,962 ¥ 145,689 ¥ 2,128,178 ¥ (30,303 ) Non-investment 112,901 238,330 5,672 356,903 (127 ) Not rated — 5,097 — 5,097 (47 ) Total 491,428 1,847,389 151,361 2,490,178 (30,477 ) Index and basket credit default swaps held by BK: Investment grade (2) — 120,854 — 120,854 (82 ) Non-investment — 101,001 — 101,001 (2,010 ) Total — 221,855 — 221,855 (2,092 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 13,000 194,618 8,000 215,618 (3,853 ) Non-investment — — — — — Not rated 8,863 206,832 3,444 219,139 (3,043 ) Total 21,863 401,450 11,444 434,757 (6,896 ) Total index and basket credit default swaps sold 21,863 623,305 11,444 656,612 (8,988 ) Total credit default swaps sold 513,291 2,470,694 162,805 3,146,790 (39,465 ) Other credit derivatives sold (3) Investment grade 77,693 — — 77,693 (620 ) Total credit derivatives ¥ 590,984 ¥ 2,470,694 ¥ 162,805 ¥ 3,224,483 ¥ (40,085 ) Notes: (1) Fair value amounts are shown on a gross basis prior to cash collateral or counterparty netting. (2) The MUFG Group considers ratings of Baa3/BBB- (3) Other credit derivatives primarily consist of total return swaps. Single name credit default swaps Index and basket credit default swaps pro-rata The MUFG Group may economically hedge its exposure to credit derivatives by entering into offsetting derivative contracts. The carrying value and notional amounts of credit protection sold in which the MUFG Group held purchased protection with identical underlying referenced entities were approximately ¥52 billion and ¥2,416 billion, respectively, at March 31, 2018, and approximately ¥35 billion and ¥2,687 billion, respectively, at March 31, 2019. Collateral is held by the MUFG Group in relation to these instruments. Collateral requirements are determined at the counterparty level and cover numerous transactions and products as opposed to individual contracts. Credit Risk, Liquidity Risk and Credit-risk-related Contingent Features Certain derivative instruments held by the MUFG Group contain provisions that require the MUFG Group’s debt to maintain an investment grade credit rating from each of the major credit rating agencies. If the MUFG Group’s debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request payments on early termination or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position at March 31, 2018 and 2019 was approximately ¥0.7 trillion and ¥0.6 trillion, respectively, for which the MUFG Group has posted collateral of approximately ¥127 billion and ¥85 billion, respectively, in the normal course of business. The amount of additional collateral and early termination amount which could be requested if the MUFG Group’s debt falls below investment grade was ¥78 billion and ¥65 billion, respectively, as of March 31, 2018 and ¥84 billion and ¥56 billion, respectively, as of March 31, 2019.

Obligations under Guarantees an

Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block]	25. OBLIGATIONS UNDER GUARANTEES AND OTHER OFF-BALANCE Obligations under Guarantees The MUFG Group provides customers with a variety of guarantees and similar arrangements, including standby letters of credit, financial and performance guarantees, credit protection, liquidity facilities, other off-balance For certain types of derivatives, such as written interest rate options and written currency options, the maximum potential future payments are unlimited. Accordingly, it is impracticable to estimate the maximum potential amount of future payments. As such, the notional amounts of the related contracts, other than the maximum potential payments, are included in the table. The MUFG Group mitigates its credit risk exposure resulting from guarantees by utilizing various techniques, including collateralization in the form of cash, securities, and real estate properties based on management’s credit assessment of the guaranteed parties and the related credit profile. In order to manage the credit risk exposure, the MUFG Group also enters into sub-participation Maximum Amount by expiration period At March 31, 2018: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 4,311 ¥ 3,115 ¥ 850 ¥ 346 Performance guarantees 3,051 2,144 801 106 Derivative instruments (1) 40,513 15,230 18,314 6,969 Liabilities of trust accounts 9,444 6,017 558 2,869 Others 22 2 4 16 Total ¥ 57,341 ¥ 26,508 ¥ 20,527 ¥ 10,306 Maximum Amount by expiration period At March 31, 2019: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 2,792 ¥ 838 ¥ 271 Performance guarantees 3,256 2,332 784 140 Derivative instruments (1) 58,025 29,734 20,921 7,370 Liabilities of trust accounts 11,520 5,884 420 5,216 Others 53 12 13 28 Total ¥ 76,755 ¥ 40,754 ¥ 22,976 ¥ 13,025 Note: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation. Nature of Guarantee Contracts Standby letters of credit and financial guarantees generally include an obligation of an issuer or a designated third-party to guarantee the performance of the customer to the beneficiary under the terms of contracts such as lending contracts and other similar financial transactions. The MUFG Group is required to make payments to the guaranteed parties in the event that the customers fail to fulfill the obligations under the contracts. The guarantees whose contractual maturities are over 5 years are mainly comprised of guarantees of housing loans. Performance guarantees are contracts that contingently require the MUFG Group to make payments to the guaranteed party based on another party’s failure to perform under an obligating agreement, except financial obligation. For example, performance guarantees include guarantees of completion of construction projects. Derivative instruments that are deemed to be included within the definition of guarantees as prescribed in the guidance on guarantees include certain written options and credit default swaps. In order for the MUFG Group to determine if those derivative instruments meet the definition of guarantees, as prescribed in the guidance on guarantees, the MUFG Group has to track whether the counterparties are actually exposed to losses that will result from the adverse change in the underlyings. Accordingly, the MUFG Group has disclosed information on all credit default swaps and certain written options for which there is a possibility of meeting the definition of guarantees as prescribed in the guidance on guarantees, regardless of whether the counterparties have assets or liabilities related to the underlyings of the derivatives. However, credit derivatives sold by the MUFG Group at March 31, 2018 and 2019 are excluded from this presentation, as they are disclosed in Note 24. Liabilities of trust accounts represent the trustee’s potential responsibility for temporary payments to creditors of liabilities of trust accounts making use of funds of the MUFG Group, unless there are certain agreements with trust creditors that have provisions limiting the MUFG Group’s exposure as a trustee to the trust account assets. A trust may incur external liabilities to obtain certain services during the terms of the trust arrangement. While in principle, any liabilities of a trust are payable by the trust account and its beneficiaries. A trustee’s responsibility may be interpreted to encompass temporary payments for the trust account liabilities when the trust account does not maintain sufficient liquidity available for such liabilities unless the agreement with trust creditors limits the trustee’s exposure to the trust account assets. At March 31, 2018 and 2019, there were liabilities of ¥9,444 billion and ¥11,520 billion, respectively, in the segregated records of trust accounts including the amounts related to liabilities with provisions limiting trustee responsibility. Liabilities of trust accounts principally includes obligations to return collateral under security lending transactions. The MUFG Group has experienced no significant losses on such responsibilities and its exposure to the risk associated with the temporary payments is judged to be remote because trust account liabilities are generally covered by the corresponding trust account assets. The MUFG Group continuously monitors the liabilities of trust accounts and assesses the trust account’s ability to perform its obligations to prevent any unfavorable outcomes; the MUFG Group claims its recourse for its temporary payments against the trust account assets and the beneficiaries. Carrying Amount At March 31, 2018 and 2019, the carrying amounts of the liabilities related to guarantees and similar instruments set forth above were ¥1,110,505 million and ¥1,051,297 million, respectively, which are included in Other liabilities and Trading account liabilities. The guarantees and similar instruments comprising the largest components of the total were options sold in the amount of ¥1,069,156 million and ¥1,005,951 million as of March 31, 2018 and 2019, respectively. Credit derivatives sold by the MUFG Group at March 31, 2018 and 2019 are excluded from this presentation, as they are disclosed in Note 24. In addition, Other liabilities include an allowance for off-balance Performance Risk The MUFG Group monitors performance risk of its guarantees using the same credit rating system utilized for estimating probabilities of default with its loan portfolio. The MUFG Group’s credit rating system is consistent with both the method of evaluating credit risk under Basel III and those of third-party credit rating agencies. On certain underlying referenced credits or entities, ratings are not available. Such referenced credits are included in the “Not rated” category in the following tables. Presented in the tables below is the maximum potential amount of future payments classified based upon internal credit ratings as of March 31, 2018 and 2019. The determination of the maximum potential future payments is based on the notional amount of the guarantees without consideration of possible recoveries under recourse provisions or from collateral held or pledged. Such amounts do not represent the anticipated losses, if any, on these guarantees. Amount by borrower grade At March 31, 2018: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 4,311 ¥ 4,211 ¥ 83 ¥ 13 ¥ 4 Performance guarantees 3,051 2,910 113 5 23 Total ¥ 7,362 ¥ 7,121 ¥ 196 ¥ 18 ¥ 27 Amount by borrower grade At March 31, 2019: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 3,779 ¥ 98 ¥ 21 ¥ 3 Performance guarantees 3,256 3,070 79 78 29 Total ¥ 7,157 ¥ 6,849 ¥ 177 ¥ 99 ¥ 32 Notes: (1) Borrowers classified as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower’s loans are TDRs or loans contractually past due 90 days or more for special reasons. (2) Borrowers classified as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment, The guarantees the MUFG Group does not classify based upon internal credit ratings are as follows. The MUFG Group records all derivative contracts at fair value. Aggregate market risk limits have been established, and market risk measures are routinely monitored against these limits. The MUFG Group also manages its exposure to these derivative contracts through a variety of risk mitigation strategies, including, but not limited to, offsetting economic hedge positions. The MUFG Group expects the risk of loss to be remote and believes that the notional amounts of the derivative contracts generally exceed its exposure. Liabilities of trust accounts represent the trustee’s potential responsibility for temporary payments to creditors of liabilities of trust accounts using funds of the MUFG Group. The MUFG Group has experienced no significant losses on such responsibilities and its exposure to the risk associated with the temporary payments is judged to be remote because trust account liabilities are generally covered by the corresponding trust account assets. The MUFG Group conducts securities lending transactions for institutional customers as a fully disclosed agent. At times, securities lending indemnifications are issued to guarantee that a security lending customer will be made whole in the event the borrower does not return the security subject to the lending agreement and collateral held is insufficient to cover the market value of the security. All lending transactions are collateralized, primarily by cash. At March 31, 2019, the MUFG Group had no exposure that would require it to pay under this securities lending indemnification, since the collateral market value exceeds the fair value of securities lent. Other Off-balance In addition to obligations under guarantees and similar arrangements set forth above, the MUFG Group issues other off-balance off-balance off-balance 2018 2019 (in billions) Commitments to extend credit ¥ 80,090 ¥ 77,273 Commercial letters of credit 1,191 1,057 Commitments to make investments 183 240 Other 13 5 Commitments to extend credit, which generally have fixed expiration dates or other termination clauses, are legally binding agreements to lend to customers. Commitments are different from guarantees in that the commitments are generally revocable or have provisions that enable the MUFG Group to avoid payments in the event of violations of any conditions of the contracts and certain deterioration of the potential borrowers’ financial condition. Commercial letters of credit, generally used for trade transactions, are typically secured by the underlying goods. The MUFG Group continually monitors the type and amount of collateral and other securities, and requires counterparties to provide additional collateral or guarantors as necessary. Commitments to make investments are legally binding contracts to make additional contributions to corporate recovery or private equity investment funds in accordance with limited partnership agreements. Some of these funds, in which the MUFG Group has significant variable interests, are described in Note 26.

Variable Interest Entities _Tex

Variable Interest Entities [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Variable Interest Entities [Text Block]	26. VARIABLE INTEREST ENTITIES In the normal course of business, the MUFG Group has financial interests and other contractual obligations in various entities which may be deemed to be VIEs such as asset-backed conduits, various investment funds, special purpose entities created for structured financing, repackaged instruments, entities created for the securitization of the MUFG Group’s assets and trust arrangements. The following tables present the assets and liabilities of consolidated VIEs recorded on the accompanying consolidated balance sheets at March 31, 2018 and 2019: Consolidated VIEs Consolidated assets At March 31, 2018: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 7,390,029 ¥ 52,703 ¥ 44,902 ¥ 2,273 ¥ 1,777,017 ¥ 5,502,892 ¥ 10,242 Investment funds 598,662 — 10,300 461,036 19,895 — 107,431 Special purpose entities created for structured financing 198,484 — 2,332 — — 149,194 46,958 Repackaged instruments 152,781 520 — 17,376 92,210 42,632 43 Securitization of the MUFG Group’s assets 10,852,539 — — — — 10,827,488 25,051 Trust arrangements 7,177,407 — 10,541 702 152,277 7,011,255 2,632 Others 44,247 361 14,236 — 42 12,963 16,645 Total consolidated assets before elimination 26,414,149 53,584 82,311 481,387 2,041,441 23,546,424 209,002 The amounts eliminated in (7,223,156 ) (53,454 ) (59,150 ) (3,804 ) (88,758 ) (6,996,317 ) (21,673 ) Total consolidated assets ¥ 19,190,993 ¥ 130 ¥ 23,161 ¥ 477,583 ¥ 1,952,683 ¥ 16,550,107 ¥ 187,329 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 7,409,190 ¥ — ¥ 5,176,663 ¥ 1,708,354 ¥ 524,173 Investment funds 11,735 — — — 11,735 Special purpose entities created for structured financing 115,353 — 587 112,054 2,712 Repackaged instruments 148,928 — 12,676 132,012 4,240 Securitization of the MUFG Group’s assets 10,816,672 — 5,000 10,806,145 5,527 Trust arrangements 7,171,852 7,103,738 655 — 67,459 Others 43,030 — 24,747 1,603 16,680 Total consolidated liabilities before elimination 25,716,760 7,103,738 5,220,328 12,760,168 632,526 The amounts eliminated in consolidation (15,347,991 ) — (3,028,987 ) (12,248,680 ) (70,324 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,745,330 ) (7,103,738 ) (2,162,890 ) (540 ) (478,162 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 623,439 ¥ — ¥ 28,451 ¥ 510,948 ¥ 84,040 Consolidated VIEs Consolidated assets At March 31, 2019: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,698,146 ¥ 92,310 ¥ 26,101 ¥ 3,005 ¥ 1,424,444 ¥ 5,124,462 ¥ 27,824 Investment funds 680,922 — 14,113 477,239 18,118 — 171,452 Special purpose entities created for structured financing 203,458 — 2,214 — — 127,243 74,001 Repackaged instruments 279,327 506 — 53,346 137,509 86,753 1,213 Securitization of the MUFG Group’s assets 10,208,496 — — — — 10,183,624 24,872 Trust arrangements 7,888,210 — 8,953 202 311,412 7,565,862 1,781 Others 34,303 362 1,635 — 42 9,699 22,565 Total consolidated assets before elimination 25,992,862 93,178 53,016 533,792 1,891,525 23,097,643 323,708 The amounts eliminated in consolidation (7,772,776 ) (93,171 ) (29,361 ) (5,102 ) (63,331 ) (7,552,315 ) (29,496 ) Total consolidated assets ¥ 18,220,086 ¥ 7 ¥ 23,655 ¥ 528,690 ¥ 1,828,194 ¥ 15,545,328 ¥ 294,212 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 6,691,362 ¥ — ¥ 4,678,588 ¥ 1,552,572 ¥ 460,202 Investment funds 6,852 — — 5,158 1,694 Special purpose entities created for structured financing 114,469 — 609 111,523 2,337 Repackaged instruments 277,179 — 48,014 174,215 54,950 Securitization of the MUFG Group’s assets 10,167,632 — — 10,162,231 5,401 Trust arrangements 7,881,332 7,616,575 — — 264,757 Others 32,584 — 8,611 1,474 22,499 Total consolidated liabilities before elimination 25,171,410 7,616,575 4,735,822 12,007,173 811,840 The amounts eliminated in consolidation (14,676,389 ) (50,396 ) (2,996,041 ) (11,517,019 ) (112,933 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,922,307 ) (7,566,179 ) (1,719,246 ) (121 ) (636,761 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 572,714 ¥ — ¥ 20,535 ¥ 490,033 ¥ 62,146 In general, the creditors or beneficial interest holders of consolidated VIEs have recourse only to the assets of those VIEs of which they are creditors or beneficial interest holders, and do not have recourse to other assets of the MUFG Group, except where the MUFG Group is also contractually required to provide credit enhancement or program-wide liquidity. The following tables present the total assets of non-consolidated non-consolidated non-consolidated Non-consolidated VIEs On-balance On-balance sheet At March 31, 2018: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥ 29,011,749 ¥ 5,721,627 ¥ 4,645,697 ¥ 620 ¥ 1,541,591 ¥ 3,103,486 ¥ — ¥ — ¥ — Investment funds 45,090,381 1,776,366 1,525,127 213,722 891,062 413,855 6,488 17,919 17,919 Special purpose entities created for structured financing 35,437,349 4,016,999 3,193,621 309,560 116,961 2,697,126 69,974 7,217 7,217 Repackaged instruments 10,212,933 2,576,619 2,487,377 759,591 1,421,716 236,852 69,218 — — Others 49,582,444 3,760,375 2,740,529 94,882 61,192 2,482,141 102,314 24,830 24,830 Total ¥ 169,334,856 ¥ 17,851,986 ¥ 14,592,351 ¥ 1,378,375 ¥ 4,032,522 ¥ 8,933,460 ¥ 247,994 ¥ 49,966 ¥ 49,966 Non-consolidated VIEs On-balance On-balance sheet At March 31, 2019: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥29,621,609 ¥ 6,221,274 ¥ 4,982,357 ¥ 659 ¥ 1,704,553 ¥ 3,277,145 ¥ — ¥ — ¥ — Investment funds 67,750,419 1,952,676 1,753,823 187,166 1,253,705 304,310 8,642 206 206 Special purpose entities created for structured financing 42,676,571 3,972,450 3,015,593 252,597 48,895 2,709,008 5,093 9,827 9,827 Repackaged instruments 12,885,367 3,477,545 3,383,161 690,305 2,169,798 478,252 44,806 6,087 6,087 Others 60,074,743 3,482,153 2,454,807 123,595 65,451 2,145,665 120,096 57,567 57,567 Total ¥ 213,008,709 ¥ 19,106,098 ¥ 15,589,741 ¥ 1,254,322 ¥ 5,242,402 ¥ 8,914,380 ¥ 178,637 ¥73,687 ¥73,687 Maximum exposure to loss on each type of entity is determined based on the carrying amount of any on-balance off-balance on-balance In February 2015, the FASB issued new guidance which amends the consolidation analysis under the current consolidation guidance. The amendments change the VIE analysis for limited partnerships and similar legal entities, the criteria for evaluating whether fees paid to a decision maker or a service provider are a variable interest, the effect of fee arrangements and related parties on the primary beneficiary determination, and rescind the indefinite deferral provision that affects the consolidation evaluation for certain investment funds. The MUFG group adopted this new accounting guidance on April 1, 2016, which resulted in the consolidation and deconsolidation of certain investment funds. The net increase in the MUFG Group’s consolidated assets, liabilities and Noncontrolling interests, were ¥628,236 million, ¥32,254 million and ¥595,982 million, respectively, as of April 1, 2016. The cumulative effect on retained earnings was a decrease of ¥3,873 million upon the adoption. Asset-Backed Conduits This category primarily comprises the following: Multi-Seller Conduits (MUFG-sponsored Asset-Backed Commercial Paper (“ABCP”) Conduits and Other ABCP Conduits) The MUFG Group administers several conduits under asset-backed financing programs under which the conduits purchase financial assets, primarily trade accounts receivable, from the MUFG Group’s customers by issuing short-term financing instruments, primarily commercial paper, to third-party investors. Under the asset-backed financing programs, the MUFG Group acts as an agent for the conduits, which enter into agreements with the MUFG Group’s customers where the customers transfer financial assets to the conduits in exchange for monetary consideration. The MUFG Group also underwrites commercial paper for the conduits that is secured by the assets held by them and provides program-wide liquidity and credit enhancement facilities to the conduits. The MUFG Group receives fees related to the services it provides to the conduits and the program-wide liquidity and credit enhancement. The MUFG Group considers itself to be the primary beneficiary of the multi-seller conduits because, as an agent and sponsor, the MUFG Group has the power to direct activities of the conduits that most significantly impact the conduits’ economic performance and also has the obligation to absorb losses of the conduits that could potentially be significant to the conduits through the program-wide liquidity and credit enhancement. Consequently, the MUFG Group consolidates the conduits. In addition to the entities described above, the MUFG Group participates as a provider of financing to several conduits that are administered by third parties. Most of these conduits are established under a multi-seller asset-backed financing program and the MUFG Group provides financing along with other financial institutions. With respect to these conduits, the MUFG Group is not considered as the primary beneficiary because the MUFG Group’s participation in the conduits is only to provide financing along with other third-party financial institutions and it does not have the power to direct the activities of the conduits. Consequently, the MUFG Group does not consolidate the conduits. Asset-Backed Conduits (MUFG-sponsored Asset-Backed Loan (“ABL”) Programs and Other Programs) The MUFG Group administers several conduits under asset-backed financing programs where the MUFG Group provides financing to fund the conduits’ purchases of financial assets, comprising primarily trade accounts receivable, from its customers. The MUFG Group acts as an agent and sponsor for the conduits, which enter into agreements with the MUFG Group’s customers where the customers transfer assets to the conduits in exchange for monetary consideration. In most cases, the MUFG Group is the sole provider of financing that is secured by the assets held by the conduits. The MUFG Group considers itself to be the primary beneficiary of the conduits because, as an agent and sponsor for the conduits, the MUFG Group has the power to direct activities of the conduits, such as selection of the assets to be purchased and condition for purchases, and debt collection from the original obligors, that most significantly impact the conduits’ economic performance, and also has the obligation to absorb losses of the conduits that could potentially be significant to the conduits through financing it provides. Consequently, the MUFG Group consolidates the conduits. In addition, the MUFG Group is involved with entities, which take in most cases the form of a trust, where originators of financial assets, which primarily comprise lease receivables, entrust the assets with trust banks and receive beneficial certificates of trusts in exchange. The originators then transfer the beneficiary certificates to the MUFG Group in exchange for cash. The originators of the financial assets entrusted continue to be involved in the assets as servicers. Because the originators are deemed to have the power to direct activities of the entities that most significantly impact the entities’ economic performance through their role as a servicer, the MUFG Group is not considered as the primary beneficiary of these entities. Consequently, the MUFG Group does not consolidate these entities. The MUFG Group also participates as a provider of financing to the ABL programs that are managed by third parties. The MUFG Group is not considered as the primary beneficiary of the entities used in these programs as the MUFG Group’s participation in the entities is only to provide financing along with other third parties and it does not have the power to direct the activities of the entities. Consequently, the MUFG Group does not consolidate the entities used in these programs. Investment Funds This category primarily comprises the following: Corporate Recovery Funds These entities are established by fund managers, which are unrelated to the MUFG Group, for the purpose of investing in debt or equity instruments issued by distressed companies. After investment, the fund managers work closely with the management of the entities and attempt to enhance corporate value by various means including corporate restructuring and reorganization. Their exit strategies include, among others, sales to others and initial public offerings. Typically, these entities take the form of a limited partnership which is entirely funded by general and limited partner interests. These partnerships are considered as VIEs unless the limited partners hold substantive kick-out The MUFG Group mostly serves as a limited partner in corporate recovery funds that are considered as VIEs, and does not have the power to direct the activities of these funds that most significantly impact the economic performance of these funds. Therefore, the MUFG Group does not consider itself to be the primary beneficiary of these funds and does not consolidate them. Private Equity Funds The MUFG Group is involved in venture capital funds that are established by either the MUFG Group’s entities or fund managers unrelated to the MUFG Group. These entities have specific investment objectives in connection with their acquisition of equity interests, such as providing financing and other support to start-up These entities typically take the form of a limited partnership and usually are entirely funded by general and limited partner interests. These partnerships are considered as VIEs unless the limited partners hold substantive kick-out The MUFG Group participates in these partnerships as a general partner or limited partner. The MUFG Group consolidates these funds, which are considered as VIEs, if the MUFG Group has the power to direct the activities of these funds that most significantly impact the economic performance of these funds, and also has the obligation to absorb losses of these funds that could potentially be significant to these funds or the right to receive benefits from these funds that could potentially be significant to these funds. Investment Trusts The MUFG Group invests in investment trusts that are professionally managed collective investment schemes which pool money from many investors and invest in, among others, equity and debt securities. Most of these funds take the form of a trust where there is a separation in investment decisions, which is assumed by an investment manager who has no investment in a trust, and ownership through beneficiary interests issued by a trust are owned by investors. Therefore, these investment trusts are considered as VIEs. The MUFG Group consolidates these funds if the MUFG Group has the power to direct the activities of these funds that most significantly impact the economic performance of these funds, and also has the obligation to absorb losses of these funds that could potentially be significant to these funds or the right to receive benefits from these funds that could potentially be significant to these funds. Buy-out The MUFG Group provides financing to buy-out buy-out buy-out buy-out non-investment Other Investment Funds The MUFG Group’s investments in VIEs through MUFG Americas Holdings primarily consist of equity investments in low-income LIHC Unguaranteed Syndicated Investment Funds MUFG Americas Holdings creates the investment funds, serves as the managing investor member, and sells limited investor member interests to third parties. MUFG Americas Holdings receives benefits through income from the structuring of these funds, servicing fees for managing the funds and, as an investor member, tax benefits and tax credits to reduce the MUFG Americas Holdings tax liability. MUFG Americas Holdings considers itself to be the primary beneficiary and consolidates them upon adoption of the current guidance because, as a sponsor and managing member of the funds, it has the power to direct activities that most significantly impact the funds’ economic performance and also has the obligation to absorb losses of the funds that could potentially be significant to the funds. LIHC Guaranteed Syndicated Investment Funds MUFG Americas Holdings also forms limited liability companies, which in turn invest in LIHC operating partnerships, to create LIHC guaranteed syndicated investment funds. Interests in these funds are sold to third parties who pay a premium for a guaranteed return. MUFG Americas Holdings earns structuring fees from the sale of these funds and asset management fees. MUFG Americas Holdings serves as the funds’ sponsor and non-member Special Purpose Entities Created for Structured Financing This category primarily comprises the following: Leasing Transaction Vehicles These entities are established to raise funds to purchase or build equipment and machinery including, among others, commercial vessels, passenger and cargo aircraft, and production equipment for the purpose of leasing them to lessees who use the equipment and machinery as part of their business operations. These entities typically take the form of a limited partnership or a special purpose company where they fund their purchases of equipment and machinery via senior and subordinate financing. When entities take the form of a limited partnership, these entities are considered as VIEs unless limited partners hold substantive kick-out Project Financing Vehicles These entities are established to raise funds in connection with, among others, production of natural resources, construction and development of urban infrastructure (including power plants and grids, highways and ports), and the development of real estate properties or complexes. These projects typically involve special purpose companies which issue senior and subordinate financing to raise funds in connection with the various projects. The subordinate financing is usually provided by parties that will ultimately make use of the assets constructed or developed. By contrast, the senior financing is typically provided by financial institutions, including the MUFG Group. Because the MUFG Group’s participation in these entities is only to provide financing, it does not have the power to direct the activities that most significantly impact the economic performance of these entities. Therefore, the MUFG Group is not considered as the primary beneficiary of these entities and does not consolidate them. Sale-and-Leaseback The MUFG Group is involved with vehicles that acquire assets, primarily real estate, from the MUFG Group’s customers and other unrelated parties where the sellers of the assets continue to use the assets through leaseback agreements. These vehicles typically take the form of a limited partnership, and are considered as VIEs unless the limited partners hold substantive kick-out Securitization of Client Real Estate Properties These entities are established for the purpose of securitizing real estate properties held by the MUFG Group’s customers. In most cases, these entities take the form of a limited partnership or a special purpose company. When entities take the form of a limited partnership, these entities are considered as VIEs unless the limited partners hold substantive kick-out Repackaged Instruments This category primarily comprises the following: Investments in Financially-Engineered Products The MUFG Group is involved in special purpose entities that have been established to issue financial products through the engineering and repackaging of existing financial instruments such as collateralized debt obligations ( “ ” In certain instances, special purpose entities have been established and are managed by the MUFG Group. The MUFG Group’s involvement includes establishing and arranging the transaction and underwriting securities issued by the entities to general investors. For these entities, the MUFG Group has the power to direct activities that most significantly impact the economic performance and it has the obligation to absorb losses or receive benefits that could potentially be significant to the entities. As such, the MUFG Group considers itself as the primary beneficiary of these entities and consolidates them. Investments in Securitized Financial Instruments The MUFG Group holds investments in special purpose entities that issue securitized financial products. The assets held by the entities include credit card receivables and residential mortgage loans. These entities are established and managed by parties that are unrelated to the MUFG Group and the MUFG Group’s involvement with these entities is for its own investment purposes. In all cases, the MUFG Group participates as one of many other investors and the MUFG Group does not have the power to direct activities of the entities that most significantly impact the entities’ economic performance. Therefore, the MUFG Group is not considered as the primary beneficiary of these entities and does not consolidate them. Securitization of the MUFG Group’s Assets This category primarily comprises the following: Securitization for issuing interests or financing The MUFG Group establishes entities to securitize its own financial assets that include, among others, corporate and retail loans and lease receivables. The entities used for securitization, which typically take the form of a special purpose company or a trust, are established by the MUFG Group and, in most cases, issue senior and subordinate interests or financing. After securitization, the MUFG Group typically continues to service securitized assets as a servicer. The MUFG Group may also retain subordinate interests or financing or other interests. The MUFG Group is considered as the primary beneficiary and consolidates the entities used for securitization since it has the obligation to absorb losses through subordinate interests, and also has the power for determining and implementing policies as servicer that give it the ability to manage the entities’ assets that become delinquent or are in default in order to improve the economic performance of the entities. Eligible beneficiary interests in housing loan trusts The MUFG Group establishes trusts, which acquire the MUFG Group’s housing loans and in turn issue beneficiary interests to the MUFG Group, to pledge these beneficiary interests as collateral for borrowings from the Bank of Japan, as a result of the decision by the Bank of Japan on June 30, 2016 to accept these beneficial interests as collateral in the same way as it does for Japanese national government bonds. The MUFG Group is considered as the primary beneficiary and consolidates the trusts since it has the obligation to absorb losses through beneficiary interests, and also has the power for determining and implementing policies as servicer that give it the ability to manage housing loans owned by the trusts that become delinquent or are in default in order to improve the economic performance of the trusts. Trust Arrangements The MUFG Group offers, primarily through Mitsubishi UFJ Trust and Banking, a variety of trust products and services including securities investment trusts, pension trusts and trusts used as securitization vehicles. In a typical trust arrangement, however, the MUFG Group manages and administers assets on behalf of the customers in an agency, fiduciary and trust capacity and does not assume risks associated with the entrusted assets. The trusts are generally considered as VIEs because the trust beneficiaries, who provide all of the equity at risk, usually do not have power to direct the activities that most significantly impact its economic performance in the arrangements. The MUFG Group, however, is not considered as the primary beneficiary, except for the case mentioned below, because it merely receives fees for compensation for its services on terms that are customary for these activities and the fees are insignificant relative to the total amount of the trusts’ economic performance and variability. Therefore, the MUFG Group does not consolidate these entities. With respect to the jointly operated designated money in trusts, Mitsubishi UFJ Trust and Banking pools money from investors and determines how best to invest it. In addition, certain investors, such as money reserve funds and investment funds, place excess funds in the jointly operated designated money trusts. Mitsubishi UFJ Trust and Banking typically invests in high-quality financial assets, including government bonds, corporate bonds and corporate loans including loans to Mitsubishi UFJ Trust and Banking and receives fees as compensation for services. In this role as a sponsor of these trusts’ Mitsubishi UFJ Trust and Banking provides guarantees under which it is required to compensate a loss on the stated principal of the trust beneficial interests. Mitsubishi UFJ Trust and Banking is considered as the primary beneficiary of these trusts’ because it is exposed to a potentially significant amount of losses and also has the power to direct activities of these trusts’ that most significantly impact their economic performance. Upon consolidation of the trusts, the certificates issued to the investors are accounted for as deposit liabilities as the products are structured and marketed to customers similar to Mitsubishi UFJ Trust and Banking’s term deposit products. Mitsubishi UFJ Trust and Banking considers the likelihood of incurring losses on the stated principal guarantee to be highly remote. In the trusts’ operational history that extends over decades, the stated principal guarantee has never been called upon. The variability in fair value of the net assets of the trusts has been primarily affected by the fluctuations in interest rates, and the majority of such variability has been absorbed by investors or trust beneficiaries. Others This category primarily comprises the following: Financing Vehicles of the MUFG Group’s Customers The MUFG Group is involved with several entities that are established by the MUFG Group’s customers. These entities borrow funds from financial institutions and extend loans to their group entities. These entities effectively work as fund-raising vehicles for their respective group entities and enable the groups to achieve efficient financing by integrating their financing activities into a single entity. In all cases, the MUFG Group is not considered as the primary beneficiary because the MUFG Group’s participation in these entities is only to provide financing, and the customers effectively hold the power to direct activities of these entities that most significantly impact the economic performance of the entities. Consequently, the MUFG Group does not consolidate these entities. Funding Vehicles The MUFG Group has established several wholly-owned off-shore Troubled Borrowers During the normal course of business, the borrowers from the MUFG Group may experience financial difficulties and sometimes enter into certain transactions that require the MUFG Group to assess whether they would be considered as VIEs due to their difficult financial position. While in most cases such borrowers are not considered as VIEs when the transactions take place, in limited circumstances they are considered as VIEs due to insufficient equity investment at risk. In all cases, the MUFG Group is not considered as the primary beneficiary because the power to direct activities that most significantly impact the economic performance of the troubled borrowers resides with the management of the troubled borrowers, and the MUFG Group, as a lender, does not have power over or assume any role in management. Therefore, the MUFG Group does not consolidate these troubled borrowers.

Commitments and Contingent Liab

Commitments and Contingent Liabilities [Text Block]	12 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities [Text Block]	27. COMMITMENTS AND CONTINGENT LIABILITIES Lease Commitments The MUFG Group leases certain technology systems, office space and equipment under noncancelable agreements which expire through the fiscal year 2048. Future minimum rental commitments for noncancelable leases at March 31, 2019 were as follows: Capital Operating (in millions) Fiscal year ending March 31: 2020 ¥ 6,573 ¥ 94,422 2021 5,957 81,431 2022 4,739 68,416 2023 3,287 56,471 2024 1,672 50,571 2025 and thereafter 3,104 271,031 Total minimum lease payments ¥ 25,332 ¥ 622,342 Amount representing interest (2,797 ) Present value of minimum lease payments ¥ 22,535 Total rental expense for the fiscal years ended March 31, 2017, 2018 and 2019 was ¥113,649 million, ¥119,208 million and ¥116,525million, respectively. Repayment of Excess Interest The Japanese government implemented regulatory reforms affecting the consumer lending industry. In December 2006, the Diet passed legislation to reduce the maximum permissible interest rate under the Act Regulating the Receipt of Contributions, the Receipt of Deposits, and Interest Rates from 29.2% per annum to 20% per annum. The reduction in interest rates was implemented in June 2010. The regulatory reforms also included amendments to the Money Lending Business Act which, effective June 18, 2010, abolished the so-called one-third Formerly, consumer finance companies were able to charge interest rates exceeding the limits stipulated by the Interest Rate Restriction Act so long as the payment was made voluntarily by the borrowers, and the lender complied with various notice and other requirements. Accordingly, MUFG’s consumer finance subsidiaries and equity method investees offered loans at interest rates above the Interest Rate Restriction Act. Upon the implementation of the regulatory reforms in June 2010, they lowered the interest rates for loans originated after this reform to below the Interest Rate Restriction Act. In 2006, the Supreme Court of Japan passed decisions in a manner more favorable to borrowers requiring reimbursement of previously paid interest exceeding the limits stipulated by the Interest Rate Restriction Act in certain circumstances. Borrowers’ claims for reimbursement of excess interest arose after such decisions and other regulatory changes. The MUFG Group maintains an allowance for repayment of excess interest based on an analysis of past experience of reimbursement of excess interest, borrowers’ profile, recent trend of borrowers’ claims for reimbursement, and management future forecasts. Management believes that the provision for repayment of excess interest is adequate and the allowance is at the appropriate amount to absorb probable losses, so that the impact of future claims for reimbursement of excess interest will not have a material adverse effect on the MUFG Group’s financial position and results of operations. The allowance for repayment of excess interest established by MUFG’s consumer finance subsidiaries, which was included in Other liabilities, was ¥23,724 million and ¥24,983 million as of March 31, 2018 and 2019, respectively. Provision (reversal) related to the allowance is included in Other non-interest Litigation In the ordinary course of business, the MUFG Group is subject to various litigation and regulatory matters. In accordance with applicable accounting guidance, the MUFG Group establishes an accrued liability for loss contingencies arising from litigation and regulatory matters when they are determined to be probable in their occurrence and the probable loss amount can be reasonably estimated. Based upon current knowledge and consultation with counsel, management believes the eventual outcome of such litigation and regulatory matters, where losses are probable and the probable loss amounts can be reasonably estimated, would not have a material adverse effect on the MUFG Group’s financial position, results of operations or cash flows. Additionally, management believes the amount of loss that is reasonably possible, but not probable, from various litigation and regulatory matters is not material to the MUFG Group’s financial position, results of operations or cash flows.

Fees and Commissions Income _Te

Fees and Commissions Income [Text Block]	12 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Fees and Commissions Income [Text Block]	28. FEES AND COMMISSIONS INCOME Disaggregation of Contract Revenue Details of fees and commissions income for the fiscal years ended March 31, 2017, 2018 and 2019 were as follows: 2017 2018 2019 (in millions) Fees and commissions on deposits ¥ 53,891 ¥ 53,483 ¥ 52,624 Fees and commissions on remittances and transfers 168,571 169,300 168,756 Fees and commissions on foreign trading business 75,024 78,239 73,176 Fees and commissions on credit card business 198,145 212,515 225,877 Fees and commissions on security-related services 239,516 258,728 233,448 Fees and commissions on administration and management services for investment funds 155,708 159,481 147,597 Trust fees 103,110 112,399 115,002 Guarantee fees (1) 41,818 44,160 44,962 Insurance commissions 59,853 49,223 46,918 Fees and commissions on real estate business 39,808 40,573 45,160 Other fees and commissions (2) 279,449 284,691 285,058 Total ¥ 1,414,893 ¥ 1,462,792 ¥ 1,438,578 Notes: (1) Guarantee fees are not within the scope of the guidance on revenue from contracts with customers. (2) Other fees and commissions include non-refundable The following is an explanation of the relationship with revenue information disclosed for each reportable segment. These revenues from contracts with customers are related to various reportable segments disclosed in Note 30. The business segment information is derived from the internal management reporting system used by management to measure the performance of the MUFG Group’s business segments. In addition, the business segment information is primarily based on the financial information prepared in accordance with accounting principles generally accepted in Japan as adjusted in accordance with internal management accounting rules and practices. Further, the format and information as disclosed in Note 30 are not consistent with the accompanying consolidated financial statements prepared on the basis of U.S. GAAP. For example, management does not use information on segments’ gross revenue to allocate resources and assess performance. The majority of fees and commissions on deposits are from the business activities relevant to Retail & Commercial Banking Business Group (“R&C”), with Global Commercial Banking Group (“GCB”) providing a smaller impact. The business activities relevant to fees and commissions on remittances and transfers are attributable to R&C, Japanese Corporate Investment Banking Group (“JCIB”), Global Corporate Investment Banking Group (“GCIB”), and GCB with no significant concentration in any particular segments. The business activities relevant to fees and commissions on foreign trading business are attributable to R&C, JCIB, GCIB, and GCB with no significant concentration in any particular segments. The business activities relevant to fees and commissions on credit card business are substantially attributable to R&C. The majority of fees and commissions on security-related services are from the business activities relevant to R&C, with JCIB and GCIB providing a smaller impact. The business activities relevant to fees and commissions on administration and management services for investment funds are substantially attributable to Asset Management & Investor Service Business Group (“AM/IS”). The business activities relevant to trust fees are attributable to R&C, JCIB, and AM/IS with no significant concentration in any particular segments. The majority of insurance commissions are from the business activities relevant to R&C, with GCB providing a smaller impact. The business activities relevant to fees and commissions on real estate business are attributable to R&C and JCIB with no significant concentration in any particular segments. Contract Balances Contract balances are recognized in the consolidated balance sheets in accordance with the definition of receivables and contract liabilities specified in the guidance on revenue from contracts with customers. Receivables include receivables for which the services are completed, and accrued income which represents the amount of consideration unpaid for the performance obligations that have been fulfilled pursuant to certain contracts under which the services are continuously provided. Contract liabilities include unearned revenue which represents the amount of consideration received for the performance obligations that have not been fulfilled pursuant to certain contracts under which the services are continuously provided. As of March 31, 2019, receivables from contracts with customers of ¥185 billion were included primarily in Other assets, and contract liabilities of ¥8 billion were included in Other liabilities.

Trading Account Profits and Los

Trading Account Profits and Losses [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Trading Account Profits and Losses [Text Block]	29. TRADING ACCOUNT PROFITS AND LOSSES The MUFG Group performs trading activities through market-making, sales and arbitrage, while maintaining risk levels within appropriate limits in accordance with its risk management policy. The MUFG Group has trading account securities and trading derivative assets and liabilities for this purpose. In addition, the trading account securities include foreign currency-denominated debt securities such as foreign government or official institution bonds, corporate bonds and mortgage-backed securities, which are mainly comprised of securities measured at fair value under the fair value option. Net trading gains (losses) for the fiscal years ended March 31, 2017, 2018 and 2019 were comprised of the following: 2017 2018 2019 (in millions) Interest rate and other derivative contracts ¥ (325,007 ) ¥ (226,788 ) ¥ (24,031 ) Trading account securities, excluding derivatives (314,177 ) 153,674 192,931 Trading account profits (losses)—net (639,184 ) (73,114 ) 168,900 Foreign exchange derivative contracts (1) (183,159 ) (159,986 ) (354,401 ) Net trading losses ¥ (822,343 ) ¥ (233,100 ) ¥ (185,501 ) Note: (1) Losses on foreign exchange derivative contracts are included in Foreign exchange losses—net in the accompanying consolidated statements of income. Foreign exchange losses—net in the accompanying consolidated statements of income are also comprised of foreign exchange gains other than derivative contracts and foreign exchange losses related to the fair value option. For further information on the methodologies and assumptions used to estimate fair value, see Note 32, which also shows fair values of trading account securities by major category. Note 24 discloses further information regarding the derivative-related impact on Trading account profits (losses)—net by major category.

Business Segments _Text Block_

Business Segments [Text Block]	12 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Business Segments [Text Block]	30. BUSINESS SEGMENTS The reportable segments of the MUFG Group are subject to the periodical review by the Executive Committee, which represents the MUFG Group’s chief operating decision maker, to determine the allocation of management resources and assess performance. The MUFG Group has established its business units according to the characteristics of customers and the nature of the underlying business. Each business unit engages in business activities based on comprehensive strategies developed for and aimed at respective targeted customers and businesses. The business segment information is primarily based on the financial information prepared in accordance with accounting principles generally accepted in Japan as adjusted in accordance with internal management accounting rules and practices. Accordingly, the format and information are not consistent with the accompanying consolidated financial statements prepared on the basis of U.S. GAAP. A reconciliation is provided for the total amounts of segments’ operating profit with income before income tax expense under U.S. GAAP. See Note 31 for financial information relating to the MUFG Group’s operations by geographic area. The geographic financial information is consistent with the basis of the accompanying consolidated financial statements. Effective April 1, 2018, the MUFG Group reorganized its business groups in an effort to further integrate the expertise and capabilities of its consolidated subsidiaries to respond to the needs of customers more effectively and efficiently, as part of its current medium-term business plan. To make and execute unified group-wide strategies based on customer characteristics and the nature of business, the MUFG Group integrated the operations of its consolidated subsidiaries into six business segments.—Retail & Commercial Banking, Japanese Corporate & Investment Banking, Global Corporate & Investment Banking, Global Commercial Banking, Asset Management & Investor Services, and Global Markets. The following is a brief explanation of the MUFG Group’s business segments: Retail & Commercial Banking Business Group medium-sized Japanese Corporate & Investment Banking Business Group Global Corporate & Investment Banking Business Group non-Japanese Global Commercial Banking Business Group medium-sized Asset Management & Investor Services Business Group Global Markets Business Group Other Management does not use information on segments’ total assets to allocate resources and assess performance. Accordingly, business segment information on total assets is not presented. Prior period business segment information has been restated to enable comparison between the relevant amounts for the fiscal years ended March 31, 2017, 2018 and 2019. Customer Business Global Other Total (1) Retail & Commercial Japanese Global Global Asset Total (in billions) Fiscal year ended March 31, 2017: Net revenue: ¥ 1,568.0 ¥ 527.1 ¥ 418.3 ¥ 628.6 ¥ 176.7 ¥ 3,318.7 ¥ 686.8 ¥ 56.3 ¥ 4,061.8 BK and TB (2) 817.0 446.9 275.6 (1.8 ) 72.7 1,610.4 491.5 88.6 2,190.5 Net interest income 482.0 143.8 107.3 (1.7 ) — 731.4 291.0 199.4 1,221.8 Net fees 300.6 245.0 177.3 — 72.7 795.6 (8.2 ) (98.8 ) 688.6 Other 34.4 58.1 (9.0 ) (0.1 ) — 83.4 208.7 (12.0 ) 280.1 Other than BK and TB 751.0 80.2 142.7 630.4 104.0 1,708.3 195.3 (32.3 ) 1,871.3 Operating expenses 1,234.1 290.0 236.0 435.8 114.7 2,310.6 217.4 162.3 2,690.3 Operating profit (loss) ¥ 333.9 ¥ 237.1 ¥ 182.3 ¥ 192.8 ¥ 62.0 ¥ 1,008.1 ¥ 469.4 ¥ (106.0 ) ¥ 1,371.5 Fiscal year ended March 31, 2018: Net revenue: ¥ 1,584.3 ¥ 522.6 ¥ 378.6 ¥ 666.3 ¥ 190.4 ¥ 3,342.2 ¥ 565.2 ¥ 10.7 ¥ 3,918.1 BK and TB (2) 785.9 439.8 246.3 (3.5 ) 83.8 1,552.3 368.6 109.0 2,029.9 Net interest income 465.8 150.7 95.2 (3.4 ) — 708.3 182.0 229.4 1,119.7 Net fees 288.4 233.2 153.1 — 83.8 758.5 (12.2 ) (79.1 ) 667.2 Other 31.7 55.9 (2.0 ) (0.1 ) — 85.5 198.8 (41.3 ) 243.0 Other than BK and TB 798.4 82.8 132.3 669.8 106.6 1,789.9 196.6 (98.3 ) 1,888.2 Operating expenses 1,227.6 295.6 242.8 463.6 119.4 2,349.0 225.7 142.8 2,717.5 Operating profit (loss) ¥ 356.7 ¥ 227.0 ¥ 135.8 ¥ 202.7 ¥ 71.0 ¥ 993.2 ¥ 339.5 ¥ (132.1 ) ¥ 1,200.6 Fiscal year ended March 31, 2019: Net revenue: ¥ 1,521.6 ¥ 541.5 ¥ 399.7 ¥ 706.9 ¥ 203.0 ¥ 3,372.7 ¥ 472.5 ¥ (32.8 ) ¥ 3,812.4 BK and TB (2) 738.6 421.6 266.6 (1.4 ) 93.2 1,518.6 303.9 38.5 1,861.0 Net interest income 460.4 152.1 113.6 (1.4 ) — 724.7 183.1 237.4 1,145.2 Net fees 243.9 213.1 152.4 — 93.2 702.6 (14.2 ) (67.5 ) 620.9 Other 34.3 56.4 0.6 — — 91.3 135.0 (131.4 ) 94.9 Other than BK and TB 783.0 119.9 133.1 708.3 109.8 1,854.1 168.6 (71.3 ) 1,951.4 Operating expenses 1,222.8 291.8 247.0 486.5 124.6 2,372.7 221.3 146.1 2,740.1 Operating profit (loss) ¥ 298.8 ¥ 249.7 ¥ 152.7 ¥ 220.4 ¥ 78.4 ¥ 1,000.0 ¥ 251.2 ¥ (178.9 ) ¥ 1,072.3 Notes: (1) Prior period business segment information has been restated to reflect the transfer of corporate loan-related businesses of Mitsubishi UFJ Trust and Banking to MUFG Bank. In accordance with internal management accounting rules and practices, the transfer resulted in a decrease of the total operating profit by ¥24.3 billion and ¥23.5 billion for fiscal years ended March 31, 2017 and 2018, respectively. (2) “BK and TB” is a sum of MUFG Bank on a stand-alone basis and Mitsubishi UFJ Trust and Banking on a stand-alone basis. Reconciliation As set forth above, the measurement basis and the income and expense items of the internal management reporting system are different from the accompanying consolidated statements of income. Therefore, it is impracticable to present reconciliations of all of the business segments’ information, other than operating profit, to corresponding items in the accompanying consolidated statements of income. A reconciliation of operating profit under the internal management reporting system for the fiscal years ended March 31, 2017, 2018 and 2019 above to income before income tax expense shown in the accompanying consolidated statements of income is as follows: 2017 2018 2019 (in billions) Operating profit: ¥ 1,372 ¥ 1,201 ¥ 1,072 Reversal of (provision for) credit losses (254 ) 241 (34 ) Trading account profits (losses)—net (880 ) (287 ) 182 Equity investment securities gains (losses)—net 181 215 (305 ) Debt investment securities gains (losses)—net 48 71 (3 ) Foreign exchange gains (losses)—net (110 ) 7 47 Equity in earnings of equity method investees—net 198 228 210 Impairment of goodwill (7 ) — — Impairment of intangible assets (6 ) (22 ) (118 ) Reversal of (provision for) off-balance (107 ) 96 (38 ) Other—net (162 ) (88 ) (142 ) Income before income tax expense ¥ 273 ¥ 1,662 ¥ 871

Foreign Activities _Text Block_

Foreign Activities [Text Block]	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Foreign Activities [Text Block]	31. FOREIGN ACTIVITIES Foreign operations include the business conducted by overseas offices, as well as international business conducted from domestic offices, principally several international banking-related divisions of MUFG Bank’s and Mitsubishi UFJ Trust and Banking’s head office in Tokyo, and involve various transactions with debtors and customers residing outside Japan. Close integration of the MUFG Group’s foreign and domestic activities makes precise estimates of the amounts of assets, liabilities, income and expenses attributable to foreign operations difficult and necessarily subjective. Assets, income and expenses attributable to foreign operations are allocated to geographical areas based on the domicile of the debtors and customers. Generally, interest rates with respect to funds borrowed and loaned between domestic and foreign operations are based on prevailing money market rates appropriate for the transactions. In general, the MUFG Group has allocated all direct expenses and a proportionate share of general and administrative expenses to income derived from foreign loans and other transactions by the MUFG Group’s foreign operations. The following table sets forth estimated total assets at March 31, 2017, 2018 and 2019, and estimated total revenue, total expense, income (loss) before income tax expense (benefit) and net income (loss) attributable to Mitsubishi UFJ Financial Group for the respective fiscal years then ended: Domestic Foreign Total Japan United Europe Asia/Oceania Other (1) (in millions) Fiscal year ended March 31, 2017: Total revenue (2) ¥ 1,903,336 ¥ 749,513 ¥ 330,751 ¥ 818,917 ¥ 384,956 ¥ 4,187,473 Total expense (3) 2,345,731 677,548 138,128 582,665 170,858 3,914,930 Income (loss) before income tax expense (benefit) (442,395 ) 71,965 192,623 236,252 214,098 272,543 Net income (loss) attributable to Mitsubishi UFJ Financial Group (365,734 ) 119,189 216,584 102,803 129,838 202,680 Total assets at end of fiscal year 191,305,636 46,053,230 23,821,920 25,255,955 10,748,278 297,185,019 Fiscal year ended March 31, 2018: Total revenue (2) ¥ 2,127,278 ¥ 1,337,529 ¥ 506,211 ¥ 779,983 ¥ 443,106 ¥ 5,194,107 Total expense (3) 1,687,344 843,885 173,665 651,125 176,269 3,532,288 Income before income tax expense 439,934 493,644 332,546 128,858 266,837 1,661,819 Net income attributable to Mitsubishi UFJ Financial Group 140,091 447,887 322,581 92,016 225,585 1,228,160 Total assets at end of fiscal year 196,121,542 44,831,664 22,342,574 27,163,121 10,111,411 300,570,312 Fiscal year ended March 31, 2019: Total revenue (2) ¥ 1,886,469 ¥ 1,637,569 ¥ 222,267 ¥ 1,157,946 ¥ 504,372 ¥ 5,408,623 Total expense (3) 2,204,147 1,012,978 173,934 892,729 253,993 4,537,781 Income (loss) before income tax expense (benefit) (317,678 ) 624,591 48,333 265,217 250,379 870,842 Net income (loss) attributable to Mitsubishi UFJ Financial Group (345,148 ) 573,698 50,877 214,582 224,636 718,645 Total assets at end of fiscal year 194,070,495 49,987,389 21,535,278 27,992,986 11,642,751 305,228,899 Notes: (1) Other areas primarily include Canada, Latin America, the Caribbean and the Middle East. (2) Total revenue is comprised of Interest income and Non-interest (3) Total expense is comprised of Interest expense, Provision for (reversal of) credit losses and Non-interest The following is an analysis of certain asset and liability accounts related to foreign activities at March 31, 2018 and 2019: 2018 2019 (in millions) Cash and due from banks ¥ 1,816,704 ¥ 828,839 Interest-earning deposits in other banks 8,560,283 8,453,191 Total ¥ 10,376,987 ¥ 9,282,030 Trading account assets ¥ 23,904,678 ¥ 26,991,984 Investment securities ¥ 7,692,969 ¥ 8,779,340 Loans—net of unearned income, unamortized premiums and deferred loan fees ¥ 51,339,696 ¥ 51,678,674 Deposits ¥ 45,818,648 ¥ 49,044,234 Funds borrowed: Call money, funds purchased ¥ 355,666 ¥ 67,246 Payables under repurchase agreements 8,181,347 9,459,547 Payables under securities lending transactions 276,563 47,886 Other short-term borrowings 5,152,667 5,107,832 Long-term debt 2,223,246 2,697,463 Total ¥ 16,189,489 ¥ 17,379,974 Trading account liabilities ¥ 4,251,049 ¥ 3,897,844

Fair Value _Text Block_

Fair Value [Text Block]	12 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value [Text Block]	32. FAIR VALUE Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The guidance on fair value measurements also specifies a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable inputs, for example, the reporting entity’s own data. Based on the observability of the inputs used in the valuation techniques, the following three-level hierarchy is specified by the guidance: • Level 1—Unadjusted quoted prices for identical instruments in active markets. • Level 2—Observable inputs other than Level 1 prices for substantially the full term of the instruments, such as quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; other inputs that are observable; or market-corroborated inputs. • Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the instruments. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The MUFG Group has an established and documented process for determining fair values in accordance with the guidance. When available, quoted prices are used to determine fair value. If quoted prices are not available, fair value is based upon valuation techniques that use observable or unobservable inputs. The fair values of liabilities are determined by discounting future cash flows at a rate which incorporates the MUFG Group’s own creditworthiness. In addition, valuation adjustments may be made to ensure the financial instruments are recorded at fair value. These adjustments include, but are not limited to, amounts that reflect counterparty credit quality, funding cost, liquidity risk and model risk. The following section describes the valuation techniques used by the MUFG Group to measure fair values of certain financial instruments. The discussion includes the general classification of such financial instruments in accordance with the fair value hierarchy, a brief explanation of the valuation techniques, the significant inputs to those valuation techniques, and any additional significant assumptions. Trading Account Assets and Liabilities—Trading Account Securities When quoted prices are available in an active market, the MUFG Group uses quoted prices to measure the fair values of securities and such securities are classified in Level 1 of the fair value hierarchy. Examples of Level 1 securities include certain Japanese and foreign government bonds, and marketable equity securities. When quoted prices are available but the securities are not traded in active markets, such securities are classified in Level 2 of the fair value hierarchy. These securities include certain Japanese government agency bonds, Japanese prefectural and municipal bonds, foreign government and official institution bonds, corporate bonds, residential mortgage-backed securities and equity securities. As for quoted prices provided by third-party vendors, independent price verification is performed by the MUFG group to determine the quality and reliability of the data for fair value measurement purposes. As part of its independent price verification procedures, the MUFG group obtains a sufficient understanding of the vendors’ pricing sources and valuation processes. Further, the MUFG group performs internal price verification procedures to ensure that the quoted prices provided from the third-party vendors are reasonable. Such verification procedures include comparison of pricing sources and analysis of variances beyond certain thresholds. When quoted prices are not available, the MUFG Group estimates fair values by using an internal model, quoted prices of securities with similar characteristics or non-binding non-binding When there is less liquidity for securities or significant inputs used in the fair value measurements are unobservable, such securities are classified in Level 3 of the fair value hierarchy. Examples of such Level 3 securities include CLOs backed by general corporate loans, which are classified in asset-backed securities. The fair value of CLOs is measured by weighing the estimated fair value amounts from the internal model and the non-binding Trading Account Assets and Liabilities—Derivatives Exchange-traded derivatives valued using quoted prices are classified in Level 1 of the fair value hierarchy. Examples of Level 1 derivatives include stock futures index and interest rate futures. However, the majority of the derivative contracts entered into by the MUFG Group are traded over-the-counter Derivatives that are valued using valuation techniques with significant unobservable inputs are classified in Level 3 of the fair value hierarchy. Examples of Level 3 derivatives include long-term interest rate or currency swaps and certain credit derivatives, where significant inputs such as volatility, credit curves and correlation of such inputs are unobservable. Investment Securities Investment securities include Available-for-sale Other Assets Other assets measured at fair value mainly consist of securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivatives designated as hedging instruments. The securities received as collateral under lending transactions mainly consist of certain Japanese and foreign government bonds which are valued using the valuation techniques previously described in the section entitled “Trading Accounts Assets and Liabilities—Trading Account Securities” Money in trust for segregating cash deposited by customers on security transactions mainly consists of certain Japanese government bonds which are valued using the valuation techniques described in the “Trading Account Assets and Liabilities—Trading Account Securities” The fair values of derivatives designated as hedging instruments are measured using the valuation techniques described in the “Trading Account Assets and Liabilities—Derivatives” Obligations to Return Securities Received as Collateral Obligations to return securities received as collateral under securities lending transactions are measured at the fair values of the securities received as collateral. The securities received as collateral consist primarily of certain Japanese and foreign government bonds, whose fair values are measured using the valuation techniques described in the “Trading Account Assets and Liabilities—Trading Account Securities” Other Short-term Borrowings and Long-term Debt Certain short-term borrowings and long-term debt are measured at fair value due to the election of the fair value option. The fair value of these instruments are measured principally based on the discounted cash flows. Where the inputs into the valuation techniques are mainly based on observable inputs, these instruments are classified in Level 2 of the fair value hierarchy. Where significant inputs are unobservable, they are classified in Level 3 of the fair value hierarchy. Market Valuation Adjustments Counterparty credit risk adjustments are made to certain financial assets such as over-the-counter Funding valuation adjustment (“FVA”) represents the adjustment to reflect the impact of uncollateralized funding. The FVA is calculated using the MUFG’s market funding spread and the funding exposure of any uncollateralized component of the over-the-counter Liquidity adjustments are applied mainly to the instruments classified in Level 3 of the fair value hierarchy when recent observable prices of such instruments are not available or such instruments are traded in inactive or less active markets. The liquidity adjustments are based on the facts and circumstances of the markets including the availability of external quotes and the time since the latest available quote. Model valuation adjustments such as unobservable parameter valuation adjustments may be provided when the fair values of instruments are determined based on internally developed valuation techniques. Examples of such adjustments include adjustments to the model price of certain derivatives where parameters such as correlation are unobservable. Unobservable parameter valuation adjustments are applied to mitigate the uncertainty inherent in the resulting valuation estimate. Investments in Certain Entities That Calculate Net Asset Value per Share The MUFG Group has interests in investment funds mainly private equity funds, and real estate funds that are measured at fair value on a recurring or nonrecurring basis. Private equity funds have specific investment objectives in connection with their acquisition of equity interests, such as providing financing and other support to start-up Real estate funds invest globally and primarily in real estate companies, debt recapitalizations and direct property. These investments are generally not redeemable with the funds. Distributions from each fund will be received as the underlying investments of the funds are liquidated, the timing of which is uncertain. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following tables present the financial instruments carried at fair value by level within the fair value hierarchy as of March 31, 2018 and 2019: At March 31, 2018 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 10,876,424 ¥ 10,876,080 ¥ 827,493 ¥ 22,579,997 Debt securities Japanese national government and Japanese government agency bonds 1,388,143 477,530 — 1,865,673 Japanese prefectural and municipal bonds — 189,756 — 189,756 Foreign government and official institution bonds 8,190,781 469,342 1,047 8,661,170 Corporate bonds — 3,255,503 23,092 3,278,595 Residential mortgage-backed securities — 4,432,307 41,141 4,473,448 Asset-backed securities — 186,351 684,637 870,988 Other debt securities — 2,800 33,450 36,250 Commercial paper — 1,210,775 — 1,210,775 Equity securities (2) 1,297,500 651,716 44,126 1,993,342 Trading derivative assets 71,175 12,420,100 93,900 12,585,175 Interest rate contracts 3,320 8,681,427 27,092 8,711,839 Foreign exchange contracts 1,890 3,543,413 12,118 3,557,421 Equity contracts 65,965 118,351 22,994 207,310 Commodity contracts — 6,239 30,753 36,992 Credit derivatives — 70,670 943 71,613 Investment securities: Available-for-sale 23,105,682 9,376,772 350,660 32,833,114 Japanese national government and Japanese government agency bonds 21,522,128 3,045,776 — 24,567,904 Japanese prefectural and municipal bonds — 1,537,431 — 1,537,431 Foreign government and official institution bonds 1,583,554 567,946 20,192 2,171,692 Corporate bonds — 1,113,323 6,037 1,119,360 Residential mortgage-backed securities — 1,617,520 15 1,617,535 Commercial mortgage-backed securities — 92,806 2,430 95,236 Asset-backed securities — 1,397,177 161,172 1,558,349 Other debt securities — 4,793 160,814 165,607 Equity securities (6) 6,255,413 416,171 28,359 6,699,943 Marketable equity securities 6,255,413 416,171 — 6,671,584 Nonmarketable equity securities — — 28,359 28,359 Others (3)(4) 955,548 93,042 8,660 1,057,250 Total ¥ 41,264,242 ¥ 33,182,165 ¥ 1,309,072 ¥ 75,755,479 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 208,354 ¥ 7,060 ¥ — ¥ 215,414 Trading derivative liabilities 80,673 11,844,463 81,781 12,006,917 Interest rate contracts 3,085 8,659,042 12,496 8,674,623 Foreign exchange contracts 2,058 2,992,812 5,382 3,000,252 Equity contracts 75,530 117,572 33,679 226,781 Commodity contracts — 4,362 30,070 34,432 Credit derivatives — 70,675 154 70,829 Obligation to return securities received as collateral 3,030,974 145,988 — 3,176,962 Others (5) — 507,700 (25,528 ) 482,172 Total ¥ 3,320,001 ¥ 12,505,211 ¥ 56,253 ¥ 15,881,465 At March 31, 2019 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 12,821,328 ¥ 13,725,079 ¥ 785,326 ¥ 27,331,733 Debt securities Japanese national government and Japanese government agency bonds 2,117,841 512,134 — 2,629,975 Japanese prefectural and municipal bonds — 117,799 — 117,799 Foreign government and official institution bonds 9,264,028 454,365 792 9,719,185 Corporate bonds — 3,203,585 31,384 3,234,969 Residential mortgage-backed securities — 7,038,353 35,181 7,073,534 Asset-backed securities — 253,274 627,678 880,952 Other debt securities — 747 35,148 35,895 Commercial paper — 1,473,693 — 1,473,693 Equity securities (2) 1,439,459 671,129 55,143 2,165,731 Trading derivative assets 63,582 13,047,590 93,313 13,204,485 Interest rate contracts 23,430 10,067,719 17,307 10,108,456 Foreign exchange contracts 1,115 2,771,115 22,861 2,795,091 Equity contracts 39,037 139,666 9,000 187,703 Commodity contracts — 3,727 25,684 29,411 Credit derivatives — 65,363 18,461 83,824 Investment securities: Available-for-sale 22,550,086 10,684,983 283,434 33,518,503 Japanese national government and Japanese government agency bonds 20,635,872 3,441,824 — 24,077,696 Japanese prefectural and municipal bonds — 2,226,566 — 2,226,566 Foreign government and official institution bonds 1,914,214 707,959 19,246 2,641,419 Corporate bonds — 1,126,535 4,196 1,130,731 Residential mortgage-backed securities — 1,615,336 15 1,615,351 Commercial mortgage-backed securities — 128,917 2,038 130,955 Asset-backed securities — 1,371,467 131,455 1,502,922 Other debt securities — 66,379 126,484 192,863 Equity securities (6) 5,982,629 375,914 27,820 6,386,363 Marketable equity securities 5,982,629 375,914 — 6,358,543 Nonmarketable equity securities (7) — — 27,820 27,820 Others (3)(4) 807,193 42,184 32,378 881,755 Total ¥ 42,224,818 ¥ 37,875,750 ¥ 1,222,271 ¥ 81,322,839 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 157,114 ¥ 5,796 ¥ — ¥ 162,910 Trading derivative liabilities 88,329 12,701,110 57,143 12,846,582 Interest rate contracts 35,179 9,839,618 21,496 9,896,293 Foreign exchange contracts 2,633 2,663,347 4,670 2,670,650 Equity contracts 50,517 126,737 6,138 183,392 Commodity contracts — 2,916 24,735 27,651 Credit derivatives — 68,492 104 68,596 Obligation to return securities received as collateral 2,912,355 174,671 — 3,087,026 Others (5) — 426,368 65,648 492,016 Total ¥ 3,157,798 ¥ 13,307,945 ¥ 122,791 ¥ 16,588,534 Notes: (1) Includes securities measured under the fair value option. (2) Excludes certain investments valued at net asset value of private equity funds whose fair values were ¥21,517 million and ¥40,400 million at March 31, 2018 and 2019, respectively. The amounts of unfunded commitments related to these private equity funds were ¥61,463 million and ¥94,483 million at March 31, 2018 and 2019, respectively. (3) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivative assets designated as hedging instruments. (4) Excludes certain investments valued at net asset value of private equity funds, whose fair values at March 31, 2018 was ¥35 million, and those at March 31, 2019 was nil, respectively. There was no amount of unfunded commitments related to these private equity funds at March 31, 2018 and 2019. (5) Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments. (6) The table above reflects changes in presentation that were made to equity investment securities at March 31, 2018. See Note 1 for further information. (7) Excludes certain investments valued at net asset value of real estate funds and private funds, whose fair values at March 31, 2019 were ¥17,583 million, and ¥9,921 million, respectively. The amounts of unfunded commitments related to these real estate funds and private funds at March 31, 2019 were ¥2,054 million, and nil, respectively. Changes in Level 3 Recurring Fair Value Measurements The following tables present a reconciliation of the assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the fiscal years ended March 31, 2018 and 2019. The determination to classify a financial instrument within Level 3 is based upon the significance of the unobservable inputs to overall fair value measurement. However, Level 3 financial instruments typically include, in addition to the unobservable or Level 3 input, observable inputs (inputs that are actively quoted and can be validated to external sources). Accordingly, the gains and losses in the tables below include changes in fair value due in part to observable inputs used in the valuation techniques. March 31, Total gains (losses) Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 799,493 ¥ (25,944 ) (2) ¥ — ¥ 702,402 ¥ — ¥ (281,927 ) ¥ (376,333 ) ¥ 34,986 ¥ (25,184 ) ¥ 827,493 ¥ (26,391 ) (2) Debt securities Japanese national government and Japanese government agency bonds — (4 ) — 1,079 — — — — (1,075 ) — — Foreign government and official institution bonds 1,836 720 — 107,685 — (107,157 ) (1,064 ) — (973 ) 1,047 (2 ) Corporate bonds 25,521 (6,424 ) — 3,170 — (533 ) (10,391 ) 34,885 (5) (23,136 ) (5) 23,092 (6,377 ) Residential mortgage-backed securities 47,914 1,014 — — — — (7,787 ) — — 41,141 829 Asset-backed securities 654,814 (21,124 ) — 576,668 — (172,324 ) (353,397 ) — — 684,637 (19,387 ) Other debt securities 35,552 (2,102 ) — — — — — — — 33,450 (2,102 ) Equity securities 33,856 1,976 — 13,800 — (1,913 ) (3,694 ) 101 — 44,126 648 Trading derivatives—net 37,245 3,912 (2) 520 1,367 (1,518 ) — (23,699 ) (466 ) (5,242 ) 12,119 (9,055 ) (2) Interest rate contracts—net 28,551 (4,730 ) (42 ) — — — (8,810 ) (2,433 ) 2,060 14,596 (3,908 ) Foreign exchange contracts—net 14,858 (2,434 ) 294 26 — — (67 ) 1,996 (5) (7,937 ) 6,736 1,713 Equity contracts—net (6,312 ) 12,518 272 687 (1,154 ) — (17,302 ) (29 ) (5) 635 (5) (10,685 ) (5,446 ) Commodity contracts—net 370 30 (4 ) 654 (364 ) — (3 ) — — 683 116 Credit derivatives—net (222 ) (1,472 ) — — — — 2,483 — — 789 (1,530 ) Investment securities: Available-for-sale 337,526 4,831 (3) (15,344 ) 319,092 — (163 ) (264,616 ) 93 (30,759 ) 350,660 (167 ) (3) Foreign government and official institution bonds 20,099 — (186 ) 621 — — (342 ) — — 20,192 — Corporate bonds 36,932 150 (43 ) 521 — (52 ) (805 ) 93 (5) (30,759 ) (5) 6,037 (167 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,971 — 4 — — — (545 ) — — 2,430 — Asset-backed securities 116,919 4,681 (9,605 ) 306,680 — — (257,503 ) — — 161,172 — Other debt securities 160,590 — (5,514 ) 11,270 — (111 ) (5,421 ) — — 160,814 — Equity securities 26,292 1,640 (3) — 3,930 — (2,782 ) (7 ) — (714 ) 28,359 300 (3) Nonmarketable equity securities 26,292 1,640 — 3,930 — (2,782 ) (7 ) — (714 ) 28,359 300 Others 3,850 (426 ) (7) (37 ) 5,584 — (311 ) — — — 8,660 (592 ) (7) Total ¥ 1,204,406 ¥ (15,987 ) ¥ (14,861 ) ¥ 1,032,375 ¥ (1,518 ) ¥ (285,183 ) ¥ (664,655 ) ¥ 34,613 ¥ (61,899 ) ¥ 1,227,291 ¥ (35,905 ) Liabilities Others ¥ 28,432 ¥ 4,508 (4) ¥ (2,005 ) ¥ — ¥ 6,601 ¥ — ¥ (27,824 ) ¥ 1,056 (6) ¥ (31,290 ) (6) ¥ (25,528 ) ¥ 35,010 (4) Total ¥ 28,432 ¥ 4,508 ¥ (2,005 ) ¥ — ¥ 6,601 ¥ — ¥ (27,824 ) ¥ 1,056 ¥ (31,290 ) ¥ (25,528 ) ¥ 35,010 March 31, Total gains (losses) for the period Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 827,493 ¥ 23,848 (2) ¥ (1,341 ) ¥ 454,048 ¥ — ¥ (316,384 ) ¥ (213,944 ) ¥ 29,445 ¥ (17,839 ) ¥ 785,326 ¥ 18,299 (2) Debt securities Foreign government and official institution bonds 1,047 863 — 117,619 — (118,377 ) (317 ) — (43 ) 792 5 Corporate bonds 23,092 611 — 2,040 — (1,798 ) (4,188 ) 29,423 (5) (17,796 ) (5) 31,384 286 Residential mortgage-backed securities 41,141 (282 ) — — — — (5,678 ) — — 35,181 (289 ) Asset-backed securities 684,637 18,692 (1,341 ) 315,865 — (195,851 ) (194,324 ) — — 627,678 15,528 Other debt securities 33,450 1,698 — — — — — — — 35,148 1,698 Equity securities 44,126 2,266 — 18,524 — (358 ) (9,437 ) 22 — 55,143 1,071 Trading derivatives—net 12,119 (5,871 ) (2) (744 ) 787 (682 ) — 37 20,192 10,332 36,170 (25,241 ) (2) Interest rate contracts—net 14,596 12,397 57 — (119 ) — (25,601 ) (7,013 ) 1,494 (4,189 ) 11,507 Foreign exchange contracts—net 6,736 (10,997 ) (419 ) 210 — — (322 ) 27,230 (5) (4,247 ) 18,191 (10,451 ) Equity contracts—net (10,685 ) 18,756 (374 ) 13 (228 ) — (17,680 ) (25 ) (5) 13,085 (5) 2,862 (752 ) Commodity contracts—net 683 32 6 564 (335 ) — (1 ) — — 949 795 Credit derivatives—net 789 (26,059 ) (14 ) — — — 43,641 — — 18,357 (26,340 ) Investment securities: Available-for-sale 350,660 6,415 (3) (9,791 ) 273,201 — — (338,180 ) 1,456 (327 ) 283,434 (498 ) (3) Foreign government and official institution bonds 20,192 — (876 ) 645 — — (715 ) — — 19,246 — Corporate bonds 6,037 (345 ) 3 3,450 — — (6,078 ) 1,456 (5) (327 ) (5) 4,196 (498 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,430 — (135 ) — — — (257 ) — — 2,038 — Asset-backed securities 161,172 6,760 (5,016 ) 263,587 — — (295,048 ) — — 131,455 — Other debt securities 160,814 — (3,767 ) 5,519 — — (36,082 ) — — 126,484 — Equity securities 28,359 (2,298 ) (3) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) (3) Nonmarketable equity securities 28,359 (2,298 ) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) Others 8,660 (1,022 ) (7) (20 ) 24,961 — (206 ) — 5 — 32,378 (1,191 ) (7) Total ¥ 1,227,291 ¥ 21,072 ¥ (11,896 ) ¥ 756,792 ¥ (682 ) ¥ (318,008 ) ¥ (552,087 ) ¥ 51,098 ¥ (8,452 ) ¥ 1,165,128 ¥ (11,691 ) Liabilities Others ¥ (25,528 ) ¥ (19,629 ) (4) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 (6) ¥ 35,230 (6) ¥ 65,648 ¥ (10,778 ) (4) Total ¥ (25,528 ) ¥ (19,629 ) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 ¥ 35,230 ¥ 65,648 ¥ (10,778 ) Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account profits (losses)—net and in Foreign exchange losses—net. (3) Included in Investment securities gains (losses)—net. (4) Included in Trading account profits (losses)—net. (5) Transfers into Level 3 for Foreign exchange contract were mainly caused by the valuation using certain unobservable input. Transfers into (out of) Level 3 for corporate bonds were caused by the decrease (increase) in liquidity or the availability of the quoted prices provided by third-party venders and Equity contracts—net were mainly caused by the change of valuation model and the change cease using certain unobservable input. (6) Transfers into (out of) Level 3 for bifurcated embedded derivatives in Others were mainly caused by the decrease (increase) in the observability of the key inputs to the valuation models and a corresponding increase (decrease) in the significance of the unobservable inputs. (7) Included in Other non-interest (8) The table above reflects changes in presentation that were made to equity investment securities at March 31, 2018. See Note 1 for further information. Quantitative Information about Level 3 Fair Value Measurements The following tables present information on the valuation techniques, significant unobservable inputs and their ranges for each major category of assets and liabilities measured at fair value on a recurring basis and classified in Level 3: At March 31, 2018 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 20,192 Return on equity method Probability of default 0.0%~0.4% 0.2 % Recovery rate 60.0%~70.0% 66.7 % Market-required return on capital 8.0%~10.0% 9.5 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 110,536 Discounted cash flow Probability of default 1.2%~5.3% 4.5 % Recovery rate 60.0%~76.0% 66.3 % 684,586 Internal model (4) Asset correlations 9.0% 9.0 % Discount factor 1.0% 1.0 % Prepayment rate 37.2% 37.2 % Probability of default 0.0%~91.3% — (3) Recovery rate 65.3% 65.3 % Other debt securities 33,450 Discounted cash flow Liquidity premium 0.5%~2.4% 0.8 % 149,759 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 40.0%~90.0% 72.5 % Market-required return on capital 8.0%~10.0% 9.7 % At March 31, 2018 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net 14,460 Option model Probability of default 0.0%~12.5% Correlation between interest rates 34.1%~52.7% Correlation between interest rate and foreign exchange rate 19.7%~50.4% Recovery rate 41.0%~46.0% Volatility 13.4%~100.0% Probability of prepayment 100.0% Foreign exchange contracts—net 6,779 Option model Probability of default 0.0%~12.5% Correlation between interest rates 40.3%~74.0% Correlation between interest rate and foreign exchange rate 28.1%~50.7% Recovery rate 41.0%~46.0% Correlation between underlying assets 85.0% Volatility 10.3%~16.2% Equity contracts—net (16,600 ) Option model Correlation between interest rate and equity 37.1%~39.0% Correlation between foreign exchange rate and equity 7.0%~65.2% Correlation between equities 20.6%~81.7% Correlation between underlying assets 76.0% 6,528 Discounted cash flow Term of litigation 2.0 years At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 19,246 Return on equity method Probability of default 0.0%~0.4% 0.3 % Recovery rate 60.0%~70.0% 66.7 % Market-required return on capital 10.0% 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 109,213 Discounted cash flow Probability of default 1.2%~5.3% 5.0 % Recovery rate 60.0%~76.0% 67.2 % Loan price 90.5%~100.3% 95.4 % 587,577 Internal model (4) Asset correlations 10.0% 10.0 % Discount factor 1.0%~1.2% 1.2 % Prepayment rate 22.7% 22.7 % Probability of default 0.0%~90.1% — (3) Recovery rate 64.3% 64.3 % Other debt securities 35,148 Discounted cash flow Liquidity premium 1.0%~2.4% 1.3 % 112,822 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 40.0%~90.0% 78.0 % Market-required return on capital 8.0%~10.0% 9.5 % At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net (4,189 ) Option model Probability of default 0.0%~12.0% Correlation between interest rates 29.2%~51.3% Correlation between interest rate and foreign exchange rate 22.8%~60.0% Recovery rate 41.0%~48.0% Volatility 11.0%~71.3% Foreign exchange contracts—net 18,198 Option model Probability of default 0.0%~12.0% Correlation between interest rates 35.0%~70.0% Correlation between interest rate and foreign exchange rate 14.8%~60.0% Recovery rate 41.0%~48.0% Correlation between underlying assets 65.0% Volatility 9.7%~18.2% Equity contracts—net (2,727 ) Option model Correlation between foreign exchange rate and equity 7.0%~64.1% Correlation between equities 21.6%~80.3% Correlation between underlying assets 51.7%~82.0% Volatility 21.0%~30.0% 5,878 Discounted cash flow Term of litigation 1.0 year Notes: (1) The fair value as of March 31, 2018 and 2019 excludes the fair value of investments valued using vendor prices. (2) Weighted averages are calculated by weighing each input by the relative fair value of the respective financial instruments. (3) See “Probability of default” in “Sensitivity to and range of unobservable inputs.” (4) For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities.” Sensitivity to and range of unobservable inputs Probability of default The wide range of probability of default used in the internal model of Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities is mainly caused by Asset-backed securities. Asset-backed securities have a large number of underlying loans, mainly corporate loans, in several industries. The MUFG Group primarily makes investments in the senior tranches of such securities, with no investments in the equity portion. Thus, the MUFG Group’s investments have higher priority of payments than mezzanine and equity and even if some of underlying loans become default, the MUFG Group may still be able to receive the full contractual payments. For derivative contracts, the MUFG Group holds positions with a large number of counterparties with various credit quality, which results in wider range of probability of default. However, the majority of counterparties have higher ratings, categorized as “Normal” in the internal credit rating system, the inputs used to estimate fair value of derivative contracts are concentrated in the lower end of the range. Discount factor and Liquidity premium Recovery rate and Prepayment rate asset-backed Volatility The level of volatility generally depends on the tenor of the underlying instrument and the strike price or level defined in the contract. Volatilities for certain combinations of tenor and strike price are not observable. The volatility inputs used to estimate fair value of interest rate contracts are distributed throughout the range. Correlation For interest rate contracts and foreign exchange contracts, the diversity in the portfolio held by the MUFG Group is reflected in wide ranges of correlation, as the fair values of transactions with a variety of currencies and tenors are determined using several foreign exchange and interest rate curves. For equity derivative contracts, the wide range of correlation between interest rate and equity is primarily due to the large number of correlation pairs with different maturities of contracts. For credit derivative contracts, the wide range of correlation between underlying assets is primarily due to factors such as reference assets with different maturities, capital structure subordinations, and credit quality. Term of litigation These swaps are valued using a discounted cash flow methodology and are dependent upon the final resolution of the Covered Litigation. The settlement timing of the Covered Litigation is not observable in the market, therefore the estimated term is classified as a level 3 input. The restricted shares which the MUFG Group purchased will be convertible to listed shares of the issuer at the end of the Covered Litigation. The restricted shares will be diluted dependent upon the settlement amount of the Covered Litigation and the dilution of the restricted shares is accomplished through an adjustment to the conversion rate of the restricted shares. In order to hedge the reduction of the conversion rate, the MUFG Group entered into certain swaps with the seller which references the conversion rate. The value generated by these trades is subject to the ultimate term of the issuer’s litigation, subject to a minimum term referenced within the trade contracts. Market-required return on capital Loan Price Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Certain assets and liabilities may be measured at fair value on a nonrecurring basis in periods subsequent to their initial recognition. These assets are subject to fair value adjustments that result from the application of the lower of cost or fair value accounting, write-downs of individual assets or the measurement alternative for nonmarketable equity securities. The following table presents the carrying value of assets measured at fair value on a nonrecurring basis by level within the fair value hierarchy as of March 31, 2018 and 2019: 2018 2019 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ — ¥ 1,984 ¥ 1,984 ¥ — ¥ 80,779 ¥ 4,208 ¥ 84,987 Loans 3,458 8,329 239,653 251,440 2,656 9,104 250,678 262,438 Loans held for sale — — 22,835 22,835 — — 77,506 77,506 Collater

Stock-based Compensation _Text

Stock-based Compensation [Text Block]	12 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation [Text Block]	33. STOCK-BASED COMPENSATION The following describes the stock-based compensation plans of MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings, Mitsubishi UFJ Morgan Stanley Securities and MUFG Americas Holdings. MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities On May 16, 2016, MUFG introduced the Board Incentive Plan as a new incentive plan for officers of MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities. On November 14, 2016, MUFG expanded the Board Incentive Plan to officers who hold unexercised Stock Acquisition Rights granted under the Stock Option Plan. As a result of this transaction, the Stock Option Plan remains available to officers who are on overseas assignment as of the transition date and hold unexercised Stock Acquisition Rights. This transition which consists of the exchange of unexercised Stock Acquisition Rights for common share of MUFG under the Board Incentive Plan was treated as modification of the Stock Option Plan for accounting purpose and incremental compensation cost resulting from the modification was ¥2,028 million. Stock Option Plan MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities have the Stock Option Plan. The Stock Acquisition Rights under the Stock Option Plan were normally issued and granted to officers once a year until the fiscal year ended March 31, 2013. They were normally issued and granted to officers except for outside directors and corporate auditors once a year from the fiscal year ended March 31, 2014. The class of shares to be issued or transferred upon exercise of the Stock Acquisition Rights is common shares of MUFG. The number of shares to be issued or transferred upon exercise of each Stock Acquisition Right (“number of granted shares”) is 100 common shares of MUFG. In the event of a stock split or reverse stock split of common shares of MUFG, the number of granted shares shall be adjusted in accordance with the ratio of the stock split or reverse stock split. If any events occur that require the adjustment to the number of granted shares (e.g., mergers, consolidations, corporate separations or capital reductions of MUFG), MUFG shall appropriately adjust the number of granted shares to a reasonable extent. The contractual term of the Stock Acquisition Rights is approximately 30 years from the date of grant. Some of the Stock Acquisition Rights vest on the date of grant and the rest of the Stock Acquisition Rights granted vest depending on the holders’ service periods as officers. The Stock Acquisition Rights are only exercisable after the date on which the following conditions are met: (1) holder as a director, a corporate executive or an executive officer is no longer a director, a corporate executive and an executive officer, and (2) holder as a corporate auditor is no longer a corporate auditor, and (3) holder as a senior fellow is no longer a senior fellow. The exercise price is ¥1 per share. The following is a summary of the Stock Acquisition Rights transactions of MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities for the fiscal year ended March 31, 2019: Number of Weighted average Weighted average Aggregate (in years) (in millions) Outstanding, beginning of fiscal year 606,400 ¥ 1 Transitioned to the Board Incentive Plan (1) (121,100 ) 1 Outstanding, end of fiscal year 485,300 ¥ 1 22.86 ¥ 266 Exercisable, end of fiscal year — ¥ — — ¥ — Notes: (1) All shares transitioned to the Board Incentive Plan were granted and vested. See the explanation of the following item, The Board Incentive Plan (2) There were no issuances under the Stock Option Plan during the fiscal years ended March 31, 2017, 2018 and 2019. The MUFG Group recognized ¥252 million of compensation costs related to the Stock Acquisition Rights with ¥77 million of the corresponding tax benefit for the fiscal year ended March 31, 2017. Cash received from the exercise of the Stock Acquisition Rights for the fiscal years ended March 31, 2017 and 2018 was ¥4 million and ¥0 million, respectively. The actual tax benefit realized for the tax deductions from exercise of the Stock Acquisition Rights for the fiscal years ended March 31, 2017 and 2018 was ¥651 million and ¥2 million, respectively. The Board Incentive Plan On May 16, 2016, MUFG’s compensation committee approved the introduction of a Board Incentive Plan as a new incentive plan for officers and covers the fiscal years corresponding to the medium-term business plan of MUFG under which common shares of MUFG and cash equivalent to the liquidation value of the common shares of MUFG together with dividends attributable to the common shares of MUFG are delivered and/or provided as compensation. The Board Incentive Plan uses the trust structure called a Board Incentive Plan Trust (“the BIP Trust”) and was authorized to purchase up to ¥15,800 million common shares of MUFG in the open market. The BIP Trust initially consisted of the BIP Trust I and the BIP Trust II and started on May 17, 2016, with the expiration date of August 31, 2018. These trusts period may be extended through the modification of the trust agreement and additional contributions to the trust. On November 14, 2016, MUFG’s compensation committee also approved the introduction of the BIP Trust III, using the same structure as above for officers to implement the transition from the Stock Option Plan under which Stock Acquisition Rights had previously been granted but have not been exercised by officers to the Board Incentive Plan. The BIP Trust III was authorized to purchase up to ¥8,100 million common shares of MUFG in the open market. In addition, on May 15, 2017, The BIP Trust III was also authorized to additional purchase and was revised amount of trust money up to ¥9,600 million common shares of MUFG. The BIP Trust III started on November 15, 2016 and will end on November 30, 2019. If any beneficiary under the BIP Trust III remains as active officers at the initial expiration date, the trust period will be extended for additional three years. The extension of the trust period will be made in the same manner up to 30 years. On May 15, 2018, MUFG’s compensation committee approved to continue with the Board Incentive Plan with amending it in part. As a result, the BIP Trust I and the BIP Trust II will be continued to August 31, 2021 by extending the trust period as approved at the compensation committee’s meeting. MUFG also approved to revise the limited amount of trust money for the BIP Trust I and the BIP Trust II up to ¥16,700 million from ¥15,800 million. MUFG funded and established the BIP Trust, and from time to time, make contributions to the BIP Trust whose beneficiaries are officers of MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities within the limit approved by MUFG’s compensation committee. MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities also reimburse MUFG for its contributions to the BIP Trust. The trustee of the BIP Trusts, Mitsubishi UFJ Trust and Banking, acquires common shares of MUFG in the open market in accordance with the instructions from the trust administrator, who is a third party that does not have any interest in MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities. During the period of the BIP Trust, certain points are awarded to officers. The number of the points will be determined based on each rank of officers, promotions to a higher rank in the BIP Trust I and based on single year financial results and the degree to which the medium-term business plan has been achieved in the BIP Trust II. At December 1, 2016, certain points were awarded to officers who have exchanged their unexercised stock acquisition rights at the transition from the Stock Option Plan to the BIP Trust III. Points of the BIP Trust III are awarded to officers who are on overseas assignment as of the transition date when the officers become domestic residents and waive their unexercised Stock Acquisition Rights. One point corresponds to one common share of MUFG, and if the number of common share of MUFG owned by the BIP Trusts has increased or decreased due to a stock split, gratis allotment of shares, reverse stock split, etc., the number of common share of MUFG to be delivered and/or provided for one point will be adjusted accordingly. Officers will receive common shares of MUFG in the number corresponding to a certain percentage of these points and cash equivalent to the liquidation value of the common shares of MUFG corresponding to the remaining points after they are liquidated within the BIP Trusts. As to the BIP Trust I and the BIP Trust III, common shares of MUFG and cash will be delivered and/or provided upon resignation of the officers. As to the BIP Trust II, common shares of MUFG and cash will be delivered and/or provided immediately following the last day of the fiscal years corresponding to the medium-term business plan of MUFG. Dividends arising from common share of MUFG will also be distributed to officers based on the number of the points or the beneficial interest of officers. The following is a roll-forward of common share of MUFG under the BIP Trust I and the BIP Trust II of MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings and Mitsubishi UFJ Morgan Stanley Securities for the fiscal year ended March 31, 2019. For the BIP Trust III, all shares were vested and there is no nonvested shares for the fiscal years ended March 31, 2017, 2018 and 2019: 2019 The BIP Trust I The BIP Trust II Number of Weighted— Number of Weighted— Nonvested, beginning of fiscal year 2,085,633 ¥ 533.17 7,045,349 ¥ 524.43 Granted 6,959,500 722.10 6,090,100 722.10 Vested (2,654,379 ) 630.44 (1,825,882 ) 659.75 Forfeited (850,072 ) 544.77 (6,566,937 ) 527.37 Nonvested, end of fiscal year 5,540,682 ¥ 722.10 4,742,630 ¥ 722.10 The weighted-average grant date fair value of the common shares of MUFG held by the BIP Trust I and the BIP Trust II, that were granted during the year ended March 31, 2017 and 2018, were ¥521.60 and ¥721.50, respectively. The total fair value of the common shares of MUFG held by the BIP Trust I and the BIP Trust II that vested during the year ended March 31, 2017 were ¥1,940 million and ¥1,163 million, respectively, during the year ended March 31, 2018 were ¥2,378 million and ¥1,668 million, respectively, and during the year ended March 31, 2019 were ¥1,452 million and ¥900 million, respectively. The following is a summary of compensation costs, the corresponding tax benefit under the BIP Trust for the fiscal year ended March 31, 2017, 2018 and 2019 and unrecognized compensation costs as of March 31, 2017, 2018 and 2019: 2017 2018 2019 The BIP The BIP The BIP The BIP The BIP The BIP The BIP The BIP The BIP (in millions) Compensation costs ¥1,238 ¥1,039 ¥2,112 ¥2,514 ¥1,452 ¥218 ¥1,601 ¥723 ¥520 Tax benefit 379 318 385 770 445 67 490 221 159 Unrecognized compensation costs 1,617 346 — 396 360 — 2,604 182 — Unrecognized compensation costs are expected to be recognized over a weighted-average period of 2.3 years for the BIP Trust I and 0.3 years for the BIP Trust II. MUFG Americas Holdings MUFG Americas Holdings adopted the MUAH Plan on June 8, 2015. Under the MUAH Plan, MUFG Americas Holdings grants restricted stock units settled in ADRs representing shares of common stock of MUFG to key employees at the discretion of the Human Capital Committee of the Board of Directors (“the Committee”). The Committee determines the number of shares, vesting requirements and other features and conditions of the restricted stock units. Under the MUAH Plan, MUFG ADRs are purchased in the open market upon the vesting of the restricted stock units, through a revocable trust. There is no amount authorized to be issued under the MUAH Plan since all shares are purchased in the open market. These awards generally vest pro-rata off-cycle Participants in the MUAH Plan are entitled to “dividend equivalent credits” on their unvested restricted stock units when MUFG pays dividends to its shareholders. The credit is equal to the dividends that the participants would have received on the shares had the shares been issued to the participants when the restricted stock units were granted. “Dividend equivalent credits” arising from grants under the MUAH Plan are paid to participants in shares on an annual basis. The following table is a roll-forward of the restricted stock units under the MUAH Plan for the fiscal year ended December 31, 2018: Restricted Stock Units 2018 Number of Units Weighted Average Grant Units outstanding, beginning of fiscal year 27,838,414 $ 5.86 Activity during fiscal year: Granted 14,667,730 5.89 Vested (13,198,540 ) 5.88 Forfeited (864,534 ) 5.97 Units outstanding, end of fiscal year 28,443,070 5.86 The weighted-average grant date fair value of restricted stock units granted during the fiscal years ended December 31, 2016 and 2017 were $4.63 and $6.53, respectively. The total fair value of RSUs that vested during the fiscal years ended December 31, 2016, 2017, and 2018 were ¥5,333 million, ¥8,414 million, and ¥8,614 million, respectively. The following table is a summary of MUFG Americas Holdings’ compensation costs, the corresponding tax benefit for the fiscal years ended December 31, 2016, 2017 and 2018, and unrecognized compensation costs as of December 31, 2016, 2017 and 2018: 2016 2017 2018 (in millions) Compensation costs ¥ 7,292 ¥ 7,405 ¥ 8,503 Tax benefit 2,830 2,917 2,209 Unrecognized compensation costs 11,183 12,543 12,210 At December 31, 2018, approximately ¥12,210 million (pretax) of compensation expense related to unvested grants had not yet been charged to net income. Unrecognized compensation costs as of December 31, 2018 are expected to be amortized into compensation expense over a weighted-average period of 1.4 years.

Parent Company Only Financial I

Parent Company Only Financial Information [Text Block]	12 Months Ended
	Mar. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Financial Information [Text Block]	34. PARENT COMPANY ONLY FINANCIAL INFORMATION Distributions of retained earnings of MUFG Bank and Mitsubishi UFJ Trust and Banking are restricted in order to meet the minimum capital adequacy requirements under the Banking Law. Additionally, retained earnings of these banking subsidiaries are restricted, except for approximately ¥5,819 billion and ¥6,077 billion, in accordance with the statutory reserve requirements under the Companies Act at March 31, 2018 and 2019, respectively. See Notes 19 and 22 for further information. The Banking Law and related regulations restrict the ability of these banking subsidiaries to extend loans or credit to the parent company. Such loans or credits to the parent company are generally limited to 15% of the banking subsidiary’s consolidated total capital, as determined by the capital adequacy guidelines. At March 31, 2018 and 2019, approximately ¥5,341 billion and ¥5,160 billion, respectively, of net assets of consolidated subsidiaries may be restricted as to payment of cash dividends and loans to the parent company. The following table presents the parent company only financial information of MUFG: Condensed Balance Sheets As of March 31, 2018 2019 (in millions) Assets: Cash and interest-earning deposits with banking subsidiaries ¥ 114,784 ¥ 203,713 Investments in subsidiaries and affiliated companies 16,720,286 16,668,232 Banking subsidiaries 12,638,315 12,754,653 Non-banking 4,081,971 3,913,579 Loans to subsidiaries 5,072,330 7,199,052 Banking subsidiaries 4,885,830 6,864,309 Non-banking 186,500 334,743 Other assets 166,514 223,725 Total assets ¥ 22,073,914 ¥ 24,294,722 Liabilities and Shareholders’ equity: Short-term borrowings from banking subsidiaries ¥ 1,600,179 ¥ 1,425,682 Long-term debt from non-banking 264,332 277,138 Long-term debt 5,088,478 7,187,469 Other liabilities 150,743 204,885 Total liabilities 7,103,732 9,095,174 Total shareholders’ equity 14,970,182 15,199,548 Total liabilities and shareholders’ equity ¥ 22,073,914 ¥ 24,294,722 Condensed Statements of Income Fiscal years ended March 31, 2017 2018 2019 (in millions) Income: Dividends from subsidiaries and affiliated companies ¥ 608,504 ¥ 576,332 ¥ 306,879 Banking subsidiaries 535,512 487,491 207,161 Non-banking 72,992 88,841 99,718 Management fees from subsidiaries 26,095 26,073 28,305 Interest income from subsidiaries 48,665 80,670 127,117 Foreign exchange gains (losses)—net 3,614 24,726 (20,598 ) Trading account losses—net (41,279 ) (26,749 ) (8,078 ) Gains on sales of investment in subsidiaries and affiliated companies — — 252,253 Other income 1,427 1,508 3,199 Total income 647,026 682,560 689,077 Expense: Operating expenses 25,692 26,016 28,168 Interest expense to subsidiaries and affiliated companies 28,867 31,426 34,594 Interest expense 35,689 65,068 108,756 Other expense 2,554 1,791 1,657 Total expense 92,802 124,301 173,175 Equity in undistributed net income (loss) of subsidiaries and affiliated companies—net (362,899 ) 672,421 194,390 Income before income tax expense (benefit) 191,325 1,230,680 710,292 Income tax expense (benefit) (11,355 ) 2,520 (8,353 ) Net income ¥ 202,680 ¥ 1,228,160 ¥ 718,645 Condensed Statements of Cash Flows Fiscal years ended March 31, 2017 2018 2019 (in millions) Operating activities: Net income ¥ 202,680 ¥ 1,228,160 ¥ 718,645 Adjustments and other 371,901 (799,571 ) (351,775 ) Net cash provided by operating activities 574,581 428,589 366,870 Investing activities: Proceeds from sales of investment in subsidiaries and affiliated companies 1,574 — 455,605 Purchase of equity investment in subsidiaries and an affiliated company (91,877 ) (53,000 ) (18,346 ) Net increase in loans to subsidiaries (1,802,664 ) (1,682,576 ) (2,112,711 ) Other—net (2,659 ) (4,361 ) (9,009 ) Net cash used in investing activities (1,895,626 ) (1,739,937 ) (1,684,461 ) Financing activities: Net decrease in short-term borrowings from subsidiaries (32,412 ) (41,402 ) (194,300 ) Proceeds from issuance of long-term debt 1,808,672 1,872,986 2,043,677 Repayment of long-term debt (20 ) (112,184 ) (314 ) Repayment of long-term debt to affiliated companies (1,136 ) (1,090 ) (500 ) Proceeds from sales of treasury stock 1 1 3 Payments for acquisition of treasury stock (200,028 ) (200,038 ) (150,277 ) Dividends paid (246,564 ) (241,067 ) (276,279 ) Other—net (9,333 ) (9,677 ) (15,490 ) Net cash provided by financing activities 1,319,180 1,267,529 1,406,520 Net increase (decrease) in cash and cash equivalents (1,865 ) (43,819 ) 88,929 Cash and cash equivalents at beginning of fiscal year 160,468 158,603 114,784 Cash and cash equivalents at end of fiscal year ¥ 158,603 ¥ 114,784 ¥ 203,713

Subsequent Events _Text Block_

Subsequent Events [Text Block]	12 Months Ended
	Mar. 31, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	35. SUBSEQUENT EVENTS Approval of Dividends On June 6, 2019, the shareholders approved the payment of cash dividends of ¥11 per share of Common stock, totaling ¥142,552 million, that were payable on June 28, 2019, to the shareholders of record on March 31, 2019. Announcement to redeem “Non-dilutive” Preferred Securities Issued by a Special Purpose Company On May 27, 2019, the Board of Directors of MUFG approved to redeem in total ¥90 billion of non-cumulative and non-dilutive perpetual preferred securities issued by MUFG Capital Finance 8 Limited, a special purpose company established in the Cayman Islands. MUFG plans to redeem these securities on July 25, 2019. The securities were previously accounted for as part of MUFG’s Tier 1 capital at March 31, 2019 under its capital adequacy requirements, subject to certain limitations. Acquisition of shares in Bank Danamon in Indonesia On April 29, 2019, MUFG Bank acquired an additional 54.0% equity interest in Danamon from AFI and other shareholders, based on a price of IDR 9,590 (approximately ¥77 (1) (1) On May 1, 2019, MUFG Bank made BNP merged into Danamon, acquiring an additional equity interest in Danamon in exchange for its equity interest in BNP, which resulted in MUFG Bank holding 94.1% equity interest in Danamon. The initial accounting for the business combination is incomplete and supplemental pro forma information of this acquisition could not be disclosed in the accompanying consolidated financial statements because this transaction occurred near the time of the issuance of such consolidated financial statements and the MUFG Group is still in the process of determining the fair value of assets acquired, liabilities assumed, and non-controlling interest. See Note 2 for further information on the Acquisition of shares in Danamon. Note: (1) Calculated based on the exchange rate of IDR1 = ¥0.008

Basis of Financial Statements_2

Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block] (Policies)	12 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Description of Business [Policy Text Block]	Description of Business Mitsubishi UFJ Financial Group, Inc. (“MUFG”) is a holding company for MUFG Bank, Ltd. (formerly, The Bank of Tokyo-Mitsubishi UFJ, Ltd., “MUFG Bank” or “BK”), Mitsubishi UFJ Trust and Banking Corporation (“Mitsubishi UFJ Trust and Banking” or “TB”), Mitsubishi UFJ Securities Holdings Co., Ltd. (“Mitsubishi UFJ Securities Holdings” or “SCHD”), Mitsubishi UFJ NICOS Co., Ltd. (“Mitsubishi UFJ NICOS”), and other subsidiaries. Mitsubishi UFJ Securities Holdings is an intermediate holding company for Mitsubishi UFJ Morgan Stanley Securities Co., Ltd. (“Mitsubishi UFJ Morgan Stanley Securities”). Through its subsidiaries and affiliated companies, MUFG engages in a broad range of financial operations, including commercial banking, investment banking, trust banking and asset management services, securities businesses, and credit card businesses, and it provides related services to individual and corporate customers. See Note 30 for more information by business segment.
Basis of Financial Statements [Policy Text Block]	Basis of Financial Statements The accompanying consolidated financial statements are presented in Japanese yen, the currency of the country in which MUFG is incorporated and principally operates. The accompanying consolidated financial statements have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). In certain respects, the accompanying consolidated financial statements reflect adjustments which are not included in the consolidated financial statements issued by MUFG and certain of its subsidiaries in accordance with applicable statutory requirements and accounting practices in their respective countries of incorporation. The major adjustments include those relating to (1) investment securities, (2) derivative financial instruments, (3) allowance for credit losses, (4) income taxes, (5) consolidation, (6) premises and equipment, (7) transfer of financial assets, (8) accrued severance indemnities and pension liabilities, (9) goodwill and other intangible assets and (10) lease transactions. Fiscal years of certain subsidiaries, which end on December 31, and MUFG’s fiscal year, which ends on March 31, have been treated as coterminous. For the fiscal years ended March 31, 2017, 2018 and 2019, the effect of recording intervening events for the three-month periods ended March 31 on MUFG’s proportionate equity in net income of subsidiaries with fiscal years ended on December 31, would have resulted in an increase of ¥10.22 billion, a decrease of ¥10.76 billion, and an increase of ¥19.97 billion to net income attributable to Mitsubishi UFJ Financial Group, respectively. No intervening events occurred during each of the three-month periods ended March 31, 2017, 2018 and 2019 which, if recorded, would have had material effects on consolidated total assets, loans, total liabilities, deposits or total equity as of March 31, 2017, 2018 and 2019.
Use of Estimates [Policy Text Block]	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to management judgment primarily relate to the allowance for credit losses, the valuation of deferred tax assets, the valuation of financial instruments, the accounting for goodwill and intangible assets, impairment of investment securities, the allowances for repayment of excess interest and accrued severance indemnities and pension liabilities.
Consolidation [Policy Text Block]	Consolidation investees-net. The MUFG Group consolidates VIEs if it has the power to direct the activities of a VIE which most significantly impact the VIE’s economic performance and has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. To assess whether a VIE should be consolidated or not, the MUFG Group considers all factors, such as the purpose and design of the VIE, contractual arrangements, and the MUFG Group’s involvement in both the establishment of the VIE and day-to-day Assets that the MUFG Group holds in an agency, fiduciary or trust capacity are not assets of the MUFG Group and, accordingly, are not included in the accompanying consolidated balance sheets.
Cash Flows [Policy Text Block]	Cash Flows
Translation of Foreign Currency Financial Statements and Foreign Currency Transactions [Policy Text Block]	Translation of Foreign Currency Financial Statements and Foreign Currency Transactions year-end Foreign currency translation gains and losses related to the financial statements of overseas entities of the MUFG Group, net of related income tax effects, are credited or charged directly to Foreign currency translation adjustments, a component of Accumulated other comprehensive income (“Accumulated OCI”). Tax effects of gains and losses on foreign currency translation of the financial statements of overseas entities are not recognized unless it is apparent that the temporary differences will reverse in the foreseeable future. Foreign currency-denominated assets and liabilities are translated into the functional currencies of the individual entities included in consolidation at the respective fiscal year-end
Repurchase Agreements, Securities Lending and Other Secured Financing Transactions [Policy Text Block]	Repurchase Agreements, Securities Lending and Other Secured Financing Transactions off-balance off-balance
Collateral [Policy Text Block]	Collateral— mark-to-market
Trading Account Securities [Policy Text Block]	Trading Account Securities—
Investment Securities [Policy Text Block]	Investment Securities— Held-to-maturity Available-for-sale net-of-tax Equity securities include marketable equity investment securities and nonmarketable equity investment securities. Marketable equity investment securities are measured at fair value with unrealized gains or losses reflected in net income. Nonmarketable equity investment securities are primarily measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes. Nonmarketable equity investment securities held by subsidiaries that are investment companies or brokers and dealers, are subject to the specialized industry accounting principles for investment companies and brokers and dealers. Securities of those subsidiaries are carried at their fair values. Interest and dividends on investment securities are reported in Interest income. Dividends are recognized when the shareholder right to receive the dividend is established. Gains and losses on disposition of investment securities are computed using the average cost method and are recognized on the trade date.
Derivative Financial Instruments [Policy Text Block]	Derivative Financial Instruments— Derivatives entered into for trading purposes are carried at fair value and are reported as Trading account assets or Trading account liabilities, as appropriate. The fair values of derivative contracts executed with the same counterparty under legally enforceable master netting agreements are presented on a gross basis. Changes in the fair value of such contracts are recognized currently in Foreign exchange gains (losses)—net with respect to foreign exchange contracts and in Trading account profits (losses)—net with respect to interest rate contracts and other types of contracts. Embedded features that are not clearly and closely related to the host contracts and meet the definition of derivatives are separated from the host contracts and measured at fair value unless the contracts embedding the derivatives are measured at fair value in their entirety. Derivatives are also used to manage exposures to fluctuations in interest and foreign exchange rates arising from mismatches of asset and liability positions. Certain of those derivatives are designated as hedging instruments and qualify for hedge accounting. The MUFG Group designates a derivative as a hedging instrument at the inception of each such hedge relationship, and it documents, for such individual hedging relationships, the risk management objective and strategy, including the item being hedged, the specific risk being hedged and the method used to assess the hedge effectiveness. In order for a hedging relationship to qualify for hedge accounting, the changes in the fair value of the derivative instruments must be highly effective in achieving offsetting changes in fair values or variable cash flows of the hedged items attributable to the risk being hedged. Any ineffectiveness, which arises during the hedging relationship, is recognized in Non-interest Non-interest Non-interest
Loans [Policy Text Block]	Loans— held-for-sale The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUFG Americas Holdings Corporation (“MUFG Americas Holdings ” or “MUAH”), and Bank of Ayudhya Public Company Limited (“Krungsri”) based on the grouping used by the MUFG Group to determine the allowance for credit losses. The MUFG Group further classifies the Commercial segment into classes based on initial measurement attributes, risk characteristics, and its method of monitoring and assessing credit risk. Originated loans are considered impaired when, based on current information and events, it is probable that the MUFG Group will be unable to collect all the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Past due status is determined based on the contractual terms of the loan and the actual number of days since the last payment date, and is considered in determining impairment. Originated loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case loan-by-loan Originated loans are generally placed on nonaccrual status when substantial doubt exists as to the full and timely collection of either principal or interest, specifically when principal or interest is contractually past due one month or more with respect to loans within all classes of the Commercial segment, three months or more with respect to loans within the Card, MUFG Americas Holdings, and Krungsri segments, and six months or more with respect to loans within the Residential segment. A nonaccrual loan may be restored to an accrual status when interest and principal payments become current and management expects that the borrower will make future contractual payments as scheduled. When a loan is placed on nonaccrual status, interest accrued but not received is generally reversed against interest income. Cash receipts on nonaccrual loans, for which the ultimate collectibility of principal is uncertain, are applied as principal reductions; otherwise, such collections are credited to income. The MUFG Group modifies certain loans in conjunction with its loss-mitigation activities. Through these modifications, concessions are granted to a borrower who is experiencing financial difficulty, generally in order to minimize economic loss, to avoid foreclosure or repossession of collateral, and to ultimately maximize payments received from the borrower. The concessions granted vary by portfolio segment, by program, and by borrower-specific characteristics, and may include interest rate reductions, term extensions, payment deferrals, and partial principal forgiveness. Loan modifications that represent concessions made to borrowers who are experiencing financial difficulties are identified as troubled debt restructurings (“TDRs”). Generally, accruing loans that are modified in a TDR remain as accruing loans subsequent to the modification, and nonaccrual loans remain as nonaccrual. However, if a nonaccrual loan has been modified as a TDR, the borrower is not delinquent under the modified terms, and demonstrates that its financial condition has improved, the MUFG Group may reclassify the loan to accrual status. This determination is generally performed at least once a year through a detailed internal credit rating review process. Once a nonaccrual loan is deemed to be a TDR, the MUFG Group will continue to designate the loan as a TDR even if the loan is reclassified to accrual status. A loan that has been modified into a TDR is considered to be impaired until it matures, is repaid, or is otherwise liquidated, regardless of whether the borrower performs under the modified terms. Because loans modified in TDRs are considered to be impaired, these loans are measured for impairment using the MUFG Group’s established asset-specific allowance methodology, which considers the expected default rates for the modified loans. See “ Allowance for Credit Losses” . In accordance with the guidance on loans and debt securities acquired with deteriorated credit quality, impaired loans acquired for which it is probable that the MUFG Group will be unable to collect all contractual receivables are initially recorded at the present value of amounts expected to be received. For these impaired loans, the related valuation allowances are not carried over or created initially. Accretable yield is limited to the excess of the investor’s estimate of undiscounted cash flows over the investor’s initial investment in the loan. Subsequent increases in cash flows expected to be collected are recognized prospectively through adjustment of the loan’s yield over its remaining life after reduction of any remaining allowance for credit losses for the loan established after its acquisition, if any, while any decrease in such cash flows below those initially expected at acquisition plus additional cash flows expected to be collected arising from changes in estimate after acquisition is recognized as an impairment.
Loan Securitization [Policy Text Block]	Loan Securitization
Allowance for Credit Losses [Policy Text Block]	Allowance for Credit Losses charge-off Key elements relating to the policies and discipline used in determining the allowance for credit losses are credit classification and the related borrower categorization process. The categorization is based on conditions that may affect the ability of borrowers to service their debt, taking into consideration current financial information, historical payment experience, credit documentation, public information, analyses of relevant industry segments or existing economic conditions. In determining the appropriate level of the allowance, the MUFG Group evaluates the probable loss by collateral value, historical loss experience, probability of insolvency and category of loan based on its type and characteristics. The MUFG Group calculates the allowance for credit losses over the loss emergence period that is a time between a loss occurring event and the subsequent confirmation of a loss. The MUFG Group updates these conditions and probable loss on a regular basis and upon the occurrence of unexpected change in the economic environment. The methodologies used to estimate the allowance and the charge-off Commercial segment In the Commercial segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment represents the impairment allowance determined in accordance with the guidance on accounting by creditors for the impairment of a loan. The factors considered by management in determining impairment are the internal credit rating assigned to each borrower which represents the borrower’s creditworthiness determined based on payment status, the number of delinquencies, and the probability of collecting principal and interest payments when due. The impairment of a loan is measured based on the present value of expected future cash flows discounted at the loan’s original effective interest rate, or the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. The formula allowance is applied to loans that are categorized as Normal or Close Watch, excluding loans identified as a TDR, based on the internal credit rating and historical loss factors which are based on the loss experience. See Note 4 for the information on loans to borrowers categorized based on the internal borrower rating. Estimated losses inherent in the loans at the balance sheet date are calculated by multiplying the default ratio by the nonrecoverable ratio (determined as a complement of the recovery ratio). The default ratio is determined by each internal credit rating, taking into account the historical number of defaults of borrowers within each internal credit rating divided by the total number of borrowers. The recovery ratio is mainly determined by the historical experience of collections against loans in default. The default ratio, the recovery ratio and other indicators are continually reviewed to determine the appropriate level of the allowance. Because the evaluation of inherent loss for these loans involves an uncertainty, subjectivity and judgment, the estimation of the formula allowance is back-tested by comparing the allowance with the actual results subsequent to the balance sheet date. The results of such back-testing are evaluated by management to determine whether the manner and level of the formula allowance needs to be changed in subsequent years. The allocated allowance for large groups of smaller-balance homogeneous loans is established through a process that begins with estimates of probable losses inherent in the portfolio. These estimates are based upon various analyses, including historical delinquency and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans categorized as Legally/Virtually Bankrupt, the carrying amount of loans less estimated value of the collateral and guaranteed amount is generally considered uncollectible, and is charged off. Residential segment In the Residential segment, the loans are comprised of smaller-balance homogeneous loans that are pooled by their internal credit ratings-based on the number of delinquencies. The loans in this segment are generally secured by collateral. Collateral values are based on internal valuation sources, and the allowance is determined for unsecured amounts. The allowance for the nondelinquent group of loans is determined based on historical loss experience. For delinquent groups of loans, the MUFG Group determines the allowance based on the probability of insolvency by the number of actual delinquencies and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the carrying amount of loans less estimated value of the collateral and guaranteed amount is generally considered uncollectible and charged off. Card segment In the Card segment, the loans are smaller-balance homogeneous loans that are pooled by their internal credit rating based on the number of delinquencies. The allowance for loans in this segment is generally determined based on the probability of insolvency by the number of actual delinquencies and historical loss experience. For calculating the allocated allowance for loans specifically identified for evaluation, impaired loans are aggregated for the purpose of measuring impairment using historical loss factors. Loans that have been modified into a TDR are treated as impaired loans, and the allowance for credit losses is determined using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the amount of loans is generally fully charged off. MUFG Americas Holdings segment In the MUFG Americas Holdings segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, the allocated allowance for large groups of smaller-balance homogeneous loans, and the unallocated allowance. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for consumer loans as well as for smaller balance commercial loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off The unallocated allowance represents an estimate of additional losses inherent in the loan portfolio and is composed of attribution factors, which are based upon management’s evaluation of various conditions that are not directly measured in the determination of the allocated allowance. The conditions used for consideration of the unallocated allowance at each balance sheet date include factors, such as existing general economic and business conditions affecting the key lending areas and products of the MUFG Group, credit quality trends and risk identification, collateral values, loan volumes, underwriting standards and concentrations, specific industry conditions, recent loss experience and the duration of the current business cycle. The MUFG Group reviews these conditions and has an internal discussion with senior credit officers on a quarterly basis. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Commercial loans are generally considered uncollectible based on an evaluation of the financial condition of a borrower as well as the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Consumer loans are generally considered uncollectible based on past due status and the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Krungsri segment In the Krungsri segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for smaller balance loans such as housing loans, credit card loans, and personal loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Loans to customers are charged off when they are determined to be uncollectible considering the financial condition of a borrower.
Allowance for Off-balance Sheet Credit Instruments [Policy Text Block]	Allowance for Off-Balance off-balance
Premises and Equipment [Policy Text Block]	Premises and Equipment Years Buildings 15 to 50 Equipment and furniture 2 to 20 Leasehold improvements 5 to 39 Maintenance, repairs and minor improvements are charged to operations as incurred. Major improvements are capitalized. Net gains or losses on dispositions of premises and equipment are included in Other non-interest Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of an asset to be held and used is measured by a comparison of the carrying amount to future undiscounted net cash flows expected to be generated by the asset. If an asset is considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value. For purposes of recognition and measurement of an impairment loss, a long-lived asset or assets are grouped with other assets and liabilities at the lowest level with independent and identifiable cash flows. Assets to be disposed of by sale are reported at the lower of the carrying amount or fair value less estimated cost to sell. Asset retirement obligations related to restoration of certain leased properties upon lease termination are recorded in Other liabilities with a corresponding increase in leasehold improvements. The amounts represent the present value of expected future cash flows associated with returning such leased properties to their original condition. The difference between the gross and present value of expected future cash flows is accreted over the life of the related leases as a non-interest
Goodwill [Policy Text Block]	Goodwill Goodwill arising from a business combination is not amortized but is tested at least annually for impairment. Goodwill is recorded at a designated reporting unit level for the purpose of assessing impairment. A reporting unit is an operating segment, or an identified business unit one level below an operating segment. An impairment loss is recognized to the extent that the carrying amount of goodwill exceeds its implied fair value.
Intangible Assets [Policy Text Block]	Intangible assets Useful lives Amortization method Software 2 to 10 Straight-line Core deposit intangibles 10 to 16 Straight-line Customer relationships 7 to 27 Straight-line, Declining-balance Trade names 7 to 40 Straight-line Intangible assets having indefinite useful lives are not amortized but are subject to annual impairment tests. An impairment exists if the carrying value of an indefinite-lived intangible asset exceeds its fair value. For other intangible assets subject to amortization, an impairment is recognized if the carrying amount is not recoverable and the carrying amount exceeds the fair value of the intangible asset. The MUFG Group capitalizes certain costs associated with the acquisition or development of internal-use internal-use
Accrued Severance and Pension Liabilities [Policy Text Block]	Accrued Severance and Pension Liabilities non-interest
Long-term Debt [Policy Text Block]	Long-Term Debt
Obligations under Guarantees [Policy Text Block]	Obligations under Guarantees
Allowance for Repayment of Excess Interest [Policy Text Block]	Allowance for Repayment of Excess Interest
Fees and Commissions [Policy Text Block]	Fees and Commissions The following is an explanation of the MUFG Group’s key revenue from contracts with customers and the timing of its recognition. Fees and commissions on deposits consist of fees and commissions charged for transaction-based services such as usage of automated teller machines and withdrawal services, and for periodic account maintenance services. The MUFG Group’s performance obligation for transaction-based services is satisfied and the fees and commissions are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction, while the MUFG Group’s performance obligation for maintenance services is satisfied and the fees and commissions are recognized over the course of each month. Fees and commissions on remittances and transfers consist of fees and commissions charged for settlement transactions such as domestic fund remittances, including electronic banking transactions, and are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction. Fees and commissions on foreign trading business consist of fees and commissions charged for fund collection and trade-related financing services related to foreign trading business, and are recognized in the period in which the related service is provided. If they arise from foreign trading business activities under which the customer consumes the related services at a point in time (e.g. foreign exchange fees), such fees are recognized at the same point in time. If they arise from foreign trading business activities under which the customer consumes the related services equally over the period of service (e.g. commercial letters of credit), such fees are recognized over the same period. Fees and commissions on credit card business consist of fees and commissions such as interchange income, royalty and other service charges from franchisees. Interchange income from the credit card business is recognized as processed transactions are settled through the associated payment networks, while royalty and other service charges related to the credit card business are recognized on a straight-line basis over the period of service. Fees and commissions on security-related services primarily consist of fees and commissions for sales and transfers of securities including investment funds, underwriting, brokerage and advisory services, arrangement fees on securitizations, and agency services for the calculation and payment of dividends. Fees and commissions on security-related services are recognized in the period in which the related service is provided. If they arise from security-related services under which the customer consumes the related services at a point in time (e.g. sales and transfers of securities are executed at the customer’s direction; underwritings of debt and equity securities or securitizations are completed at the trade date; advice is provided to the clients; and dividends are calculated and then paid to investors), such fees are recognized at the same point in time. If they arise from security-related services under which the customer consumes the related services equally over the period of service (e.g. retainer fees on M&A advisory fees), such fees are recognized over the same period. The advisory fees which are paid upon meeting certain performance goals (e.g. success fees on M&A advisory fees) are recognized at the point in time when the performance goals are met. Fees and commissions on administration and management services for investment funds primarily consist of fees and commissions earned from administrating and managing investment funds, including assets under management on behalf of clients. Such fees and commissions are recognized equally over the period of service at the amount calculated primarily based on the outstanding amount of each entrusted asset, the percentage of fees, and the extent of the service provided to administer the investment funds. Trust fees consist primarily of fees earned by fiduciary asset management and administration services for corporate pension plans and investment funds, and are recognized on an accrual basis, generally based on the volume of trust assets under management and/or the operating performance for the accounting period of each trust account. With respect to the trust accounts with a guarantee of trust principal, trust fees are determined based on the profits earned by individual trust accounts during the trust accounting period, less deductions, including provision for reserves, impairment for individual investments and dividends paid to beneficiary certificate holders. The trust fees for these trust accounts are accrued based on the amounts expected to be earned during the accounting period of each trust account. Guarantee fees consist of fees related to the guarantee business such as providing guarantees on residential mortgage loans and other loans, and are recognized over the contractual periods of the respective guarantees. Insurance commissions consist of commissions earned from third-party insurance companies for marketing and selling insurance products and for the maintenance of insurance contracts. The former is recognized at the point in time which the associated service is fulfilled as the insurance contract is established by the insurance company, while the latter is recognized over the insurance period. Fees and commissions on real estate business primarily consist of fees from real estate agent services, and are recognized in the period in which the related service is provided when assisting customers in the sales or purchase of real estate property. Other fees and commissions include various fees and commissions earned on services to customers which have performance obligations that the MUFG Group completes in order to recognize revenue. The primary portion includes non-refundable
Income Taxes [Policy Text Block]	Income Taxes The MUFG Group records net deferred tax assets to the extent these assets will more likely than not be realized. In making such determination, all available positive and negative evidence is considered, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent financial operations. In the event the MUFG Group were to determine that it would be able to realize deferred tax assets in the future in excess of their net recorded amount, the MUFG Group would make an adjustment to the valuation allowance, which would reduce the provision for income taxes. Uncertain tax positions are recorded on the basis of a two-step more-likely-than-not
Free Distributions of Common Shares [Policy Text Block]	Free Distributions of Common Shares
Earnings Per Common Share [Policy Text Block]	Earnings per Common Share
Treasury Stock [Policy Text Block]	Treasury Stock
Comprehensive Income (Loss) [Policy Text Block]	Comprehensive Income
Stock-based Compensation [Policy Text Block]	Stock-Based Compensation year-end
Reclassifications [Policy Text Block]	Reclassifications Certain reclassifications and format changes have been made to the consolidated financial statements for the fiscal years ended March 31, 2017 and 2018 to conform to the presentation for the fiscal year ended March 31, 2019. These reclassifications and format changes include reclassifications of equity investment securities from “Available-for-sale Available-for-sale Held-to-maturity Available-for-sale Available-for-sale
Accounting Changes [Policy Text Block]	Accounting Changes Revenue from Contracts with Customers— Recognition and Measurement of Financial Assets and Financial Liabilities— available-for-sale Recognition of Breakage for Certain Prepaid Stored-Value Products— non-financial Classification of Certain Cash Receipts and Cash Payments— Intra-Entity Transfers of Assets Other Than Inventory— Clarifying the Definition of a Business Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost non-service non-interest Scope of Modification Accounting Disclosure Framework Changes to the Disclosure Requirements for Fair Value Measurement
Recently Issued Accounting Pronouncements [Policy Text Block]	Recently Issued Accounting Pronouncements Leases— right-of-use The MUFG Group adopted this guidance on April 1, 2019 under a modified retrospective approach, and recorded approximately ¥0.4 trillion of right-of-use Measurement of Credit Losses on Financial Instruments— available-for-sale Simplifying the Test for Goodwill Impairment Premium Amortization on Purchased Callable Debt Securities Targeted Improvements to Accounting for Hedging Activities Improvements to Nonemployee Share-Based Payment Accounting Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract— internal-use internal-use internal-use capitalized-implementation-cost-related Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes

Basis of Financial Statements_3

Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Estimated Useful Lives of Premises and Equipment [Table Text Block]	Years Buildings 15 to 50 Equipment and furniture 2 to 20 Leasehold improvements 5 to 39
Useful Lives of Intangible Assets and Amortization Method by Major Class [Table Text Block]	Useful lives Amortization method Software 2 to 10 Straight-line Core deposit intangibles 10 to 16 Straight-line Customer relationships 7 to 27 Straight-line, Declining-balance Trade names 7 to 40 Straight-line

Investment Securities _Text B_2

Investment Securities [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities [Table Text Block]	At March 31, 2018: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 24,272,345 ¥ 299,402 ¥ 3,843 ¥ 24,567,904 Japanese prefectural and municipal bonds 1,532,143 7,808 2,520 1,537,431 Foreign government and official institution bonds 2,207,662 8,938 44,908 2,171,692 Corporate bonds 1,104,799 15,589 1,028 1,119,360 Residential mortgage-backed securities 1,632,346 752 15,563 1,617,535 Commercial mortgage-backed securities 95,383 473 620 95,236 Asset-backed securities 1,546,989 12,775 1,415 1,558,349 Other debt securities (1) 165,002 3,635 3,030 165,607 Total ¥ 32,556,669 ¥ 349,372 ¥ 72,927 ¥ 32,833,114 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,807 ¥ 40,212 ¥ — ¥ 1,141,019 Foreign government and official institution bonds 59,330 383 103 59,610 Residential mortgage-backed securities 885,965 1,660 14,726 (2) 872,899 Commercial mortgage-backed securities 171,647 4,107 1,018 (2) 174,736 Asset-backed securities 1,365,192 8,438 1,222 1,372,408 Total ¥ 3,582,941 ¥ 54,800 ¥ 17,069 ¥ 3,620,672 Equity securities: Marketable equity securities ¥ 2,789,392 ¥ 3,925,680 ¥ 43,488 ¥ 6,671,584 Total ¥ 2,789,392 ¥ 3,925,680 ¥ 43,488 ¥ 6,671,584 Notes: (1) Other debt securities in the table above include ¥152,374 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity At March 31, 2019: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,748,558 ¥ 330,115 ¥ 977 ¥ 24,077,696 Japanese prefectural and municipal bonds 2,203,978 22,593 5 2,226,566 Foreign government and official institution bonds 2,648,874 18,099 25,554 2,641,419 Corporate bonds 1,117,302 14,251 822 1,130,731 Residential mortgage-backed securities 1,635,220 1,469 21,338 1,615,351 Commercial mortgage-backed securities 132,996 310 2,351 130,955 Asset-backed securities 1,494,629 10,846 2,553 1,502,922 Other debt securities (1) 192,930 2,851 2,918 192,863 Total ¥ 33,174,487 ¥ 400,534 ¥ 56,518 ¥ 33,518,503 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,701 ¥ 41,619 ¥ — ¥ 1,142,320 Foreign government and official institution bonds 138,731 193 212 138,712 Residential mortgage-backed securities 910,990 1,209 21,202 (2) 890,997 Commercial mortgage-backed securities 160,267 1,903 2,032 (2) 160,138 Asset-backed securities 2,131,212 1,415 11,847 2,120,780 Total ¥ 4,441,901 ¥ 46,339 ¥ 35,293 ¥ 4,452,947 Notes: (1) Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity
Amortized Cost and Fair Value by Contractual Maturity [Table Text Block]	Held-to-maturity Available-for-sale Amortized Fair value Fair value (in millions) Due in one year or less ¥ 74,173 ¥ 74,059 ¥ 12,539,746 Due from one year to five years 332,491 341,814 10,847,990 Due from five years to ten years 1,405,140 1,434,699 5,316,284 Due after ten years 2,630,097 2,602,375 4,814,483 Total ¥ 4,441,901 ¥ 4,452,947 ¥ 33,518,503
Investments by Length and Category in Continuous Loss Position [Table Text Block]	Less than 12 months 12 months or more Total At March 31, 2018: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 4,767,893 ¥ 2,701 ¥ 187,000 ¥ 1,142 ¥ 4,954,893 ¥ 3,843 140 Japanese prefectural and municipal bonds 400,705 453 353,047 2,067 753,752 2,520 193 Foreign government and official institution bonds 846,818 16,955 818,937 27,953 1,665,755 44,908 157 Corporate bonds 312,993 856 74,717 172 387,710 1,028 150 Residential mortgage-backed securities 438,545 2,644 623,285 12,919 1,061,830 15,563 503 Commercial mortgage-backed securities 50,898 386 9,067 234 59,965 620 60 Asset-backed securities 144,073 1,403 5,345 12 149,418 1,415 29 Other debt securities 12,341 367 56,117 2,663 68,458 3,030 23 Total ¥ 6,974,266 ¥ 25,765 ¥ 2,127,515 ¥ 47,162 ¥ 9,101,781 ¥ 72,927 1,255 Held-to-maturity Foreign government and official institution bonds ¥ 55,837 ¥ 103 ¥ — ¥ — ¥ 55,837 ¥ 103 10 Residential mortgage-backed securities 299,286 3,487 451,968 11,239 751,254 14,726 332 Commercial mortgage-backed securities 2,150 2 169,065 1,016 171,215 1,018 32 Asset-backed securities 275,814 1,222 — — 275,814 1,222 11 Total ¥ 633,087 ¥ 4,814 ¥ 621,033 ¥ 12,255 ¥ 1,254,120 ¥ 17,069 385 Equity securities: Marketable equity securities ¥ 448,489 ¥ 43,482 ¥ 28 ¥ 6 ¥ 448,517 ¥ 43,488 116 Total ¥ 448,489 ¥ 43,482 ¥ 28 ¥ 6 ¥ 448,517 ¥ 43,488 116 Less than 12 months 12 months or more Total At March 31, 2019: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 4,149,302 ¥ 976 ¥ 5,599 ¥ 1 ¥ 4,154,901 ¥ 977 39 Japanese prefectural and municipal bonds 12,772 5 — — 12,772 5 4 Foreign government and official institution bonds 397,718 1,125 1,160,671 24,429 1,558,389 25,554 179 Corporate bonds 163,615 776 79,758 46 243,373 822 92 Residential mortgage-backed securities 316,942 1,757 648,353 19,581 965,295 21,338 536 Commercial mortgage-backed securities 42,126 678 57,167 1,673 99,293 2,351 104 Asset-backed securities 164,738 2,553 — — 164,738 2,553 87 Other debt securities 77,660 549 37,027 2,369 114,687 2,918 38 Total ¥ 5,324,873 ¥ 8,419 ¥ 1,988,575 ¥ 48,099 ¥ 7,313,448 ¥ 56,518 1,079 Held-to-maturity Foreign government and official institution bonds ¥ — ¥ — ¥ 55,084 ¥ 212 ¥ 55,084 ¥ 212 10 Residential mortgage-backed securities 74,180 1,199 798,165 20,003 872,345 21,202 457 Commercial mortgage-backed securities 3,154 37 155,011 1,995 158,165 2,032 32 Asset-backed securities 1,423,048 10,196 241,233 1,651 1,664,281 11,847 102 Total ¥ 1,500,382 ¥ 11,432 ¥ 1,249,493 ¥ 23,861 ¥ 2,749,875 ¥ 35,293 601
Roll-forward of Credit Loss Component Recognized in Earnings [Table Text Block]	2017 2018 2019 (in millions) Balance at beginning of fiscal year ¥ 6,691 ¥ 4,125 ¥ 3,499 Additions: Initial credit impairments 645 111 555 Subsequent credit impairments 96 3 51 Reductions: Securities sold or matured (3,307 ) (740 ) (2,344 ) Balance at end of fiscal year ¥ 4,125 ¥ 3,499 ¥ 1,761
Measurement Alternative of Equity Securities [Table Text Block]	Fiscal year ended 2019 (in millions) Measurement alternative balance at March 31, 2019 ¥ 563,733 Measurement alternative impairment losses (1) ¥ (2,292 ) Measurement alternative downward changes for observable prices (1)(2) ¥ — Measurement alternative upward changes for observable prices (1)(2)(3) ¥ 53,077 Notes: (1) Included in Investment securities gains (losses)—net. (2) Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer. (3) The MUFG Group applied measurement alternative upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities.
Marketable Equity Securities [Member]
Net Realized Gains (Losses) on Sales of Equity Securities and Net Unrealized Gains (Losses) on Equity Securities Still Held at the Reporting Date [Table Text Block]	Fiscal year ended 2019 (in millions) Net losses recognized during the period (1) ¥ (278,746 ) Less: Net losses recognized during the period on equity securities sold during the period (3,303 ) Net unrealized losses recognized during the reporting period still held at the reporting date ¥ (275,443 ) Note: (1) Included in Investment securities gains (losses)—net.

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Loans by Domicile and Industry of Borrower Segment Classification [Table Text Block]	2018 2019 (in millions) Domestic: Manufacturing ¥ 10,876,625 ¥ 11,153,996 Construction 781,262 717,664 Real estate 11,763,769 11,706,419 Services 2,689,086 2,653,191 Wholesale and retail 7,989,080 7,643,397 Banks and other financial institutions (1) 4,818,364 5,213,020 Communication and information services 1,551,533 1,510,596 Other industries 8,939,291 8,756,483 Consumer 16,287,332 15,802,024 Total domestic 65,696,342 65,156,790 Foreign: Governments and official institutions 920,538 841,695 Banks and other financial institutions (1) 12,851,570 11,641,373 Commercial and industrial 30,591,173 31,951,169 Other 7,270,928 7,597,502 Total foreign 51,634,209 52,031,739 Unearned income, unamortized premiums—net and deferred loan fees—net (294,656 ) (304,588 ) Total (2) ¥ 117,035,895 ¥ 116,883,941 Notes: (1) Loans to so-called “non-bank Non-bank (2) The above table includes loans held for sale of ¥226,923 million and ¥291,794 million at March 31, 2018 and 2019, respectively.
Nonaccrual Loans by Class [Table Text Block]	2018 2019 (in millions) Commercial Domestic ¥ 332,994 ¥ 272,777 Manufacturing 77,163 65,896 Construction 10,791 9,813 Real estate 33,317 23,152 Services 30,717 26,188 Wholesale and retail 108,175 94,531 Banks and other financial institutions 1,145 898 Communication and information services 13,815 11,955 Other industries 37,549 25,406 Consumer 20,322 14,938 Foreign-excluding MUAH and Krungsri 109,516 111,002 Residential 69,464 68,499 Card 61,387 61,419 MUAH 52,282 46,549 Krungsri 121,286 127,424 Total (1) ¥ 746,929 ¥ 687,670 Note: (1) The above table does not include loans held for sale of ¥61 million and ¥12,702 million at March 31, 2018 and 2019, respectively, and loans acquired with deteriorated credit quality of ¥6,659 million and ¥6,284 million at March 31, 2018 and 2019, respectively.
Impaired Loans by Class [Table Text Block]	Recorded Loan Balance At March 31, 2018: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 626,469 ¥ 188,984 ¥ 815,453 ¥ 875,795 ¥ 331,851 Manufacturing 361,268 36,566 397,834 408,124 166,098 Construction 10,936 7,172 18,108 18,490 7,921 Real estate 43,553 23,053 66,606 71,809 10,665 Services 38,097 16,600 54,697 59,335 25,890 Wholesale and retail 128,661 49,628 178,289 189,404 94,832 Banks and other financial institutions 1,125 26 1,151 1,151 972 Communication and information services 18,782 7,852 26,634 28,082 16,041 Other industries 12,978 34,282 47,260 67,525 5,350 Consumer 11,069 13,805 24,874 31,875 4,082 Foreign-excluding MUAH and Krungsri 122,243 40,249 162,492 190,518 82,855 Loans acquired with deteriorated credit quality 7,837 — 7,837 15,470 4,324 Residential (4) 105,089 6,261 111,350 134,777 16,928 Card (4) 66,964 388 67,352 74,840 21,223 MUAH (4) 48,895 33,650 82,545 94,565 7,743 Krungsri (4) 58,529 25,565 84,094 90,957 29,402 Total (3) ¥ 1,036,026 ¥ 295,097 ¥ 1,331,123 ¥ 1,476,922 ¥ 494,326 Recorded Loan Balance At March 31, 2019: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 560,474 ¥ 157,465 ¥ 717,939 ¥ 759,399 ¥ 227,004 Manufacturing 349,597 28,189 377,786 384,306 92,919 Construction 8,366 5,975 14,341 14,779 6,574 Real estate 20,848 29,961 50,809 55,943 5,704 Services 30,239 13,020 43,259 46,838 20,059 Wholesale and retail 118,253 45,620 163,873 175,714 84,503 Banks and other financial institutions 1,012 21 1,033 1,033 830 Communication and information services 8,794 6,929 15,723 16,587 6,817 Other industries 13,772 17,989 31,761 38,342 6,874 Consumer 9,593 9,761 19,354 25,857 2,724 Foreign-excluding MUAH and Krungsri 127,521 34,484 162,005 183,133 85,966 Loans acquired with deteriorated credit quality 8,136 — 8,136 14,990 5,450 Residential (4) 97,176 6,495 103,671 120,526 14,357 Card (4) 64,691 330 65,021 72,226 21,829 MUAH (4) 46,552 23,208 69,760 83,300 8,294 Krungsri (4) 57,066 26,193 83,259 90,377 28,254 Total (3) ¥ 961,616 ¥ 248,175 ¥ 1,209,791 ¥ 1,323,951 ¥ 391,154 Notes: (1) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans’ original effective interest rate, loans’ observable market price, or the fair value of the collateral if the loan is a collateral-dependent loan. (2) Included in impaired loans at March 31, 2018 and 2019 are accrual TDRs as follows: ¥536,748 million and ¥497,013 million—Commercial; ¥40,734 million and ¥34,449 million—Residential; ¥28,541 million and ¥26,183 million—Card; ¥39,333 million and ¥33,155 million—MUFG Americas Holdings; and ¥24,899 million and ¥26,851 million—Krungsri, respectively. (3) In addition to impaired loans presented in the above table, there were impaired loans held for sale of ¥61 million and ¥12,702 million at March 31, 2018 and 2019, respectively. (4) Impaired Loans for Residential, Card, MUAH and Krungsri segments in the above table include loans acquired with deteriorated credit quality.
Average Recorded Loan Balance and Recognized Interest Income on Impaired Loans by Class [Table Text Block]	2017 2018 2019 Average Recognized Average Recognized Average Recognized (in millions) Commercial Domestic ¥ 1,137,501 ¥ 14,116 ¥ 918,093 ¥ 9,441 ¥ 766,847 ¥ 12,383 Manufacturing 601,256 5,845 472,081 3,787 387,725 6,057 Construction 26,684 434 19,465 281 15,721 291 Real estate 96,229 1,593 74,087 1,146 57,850 1,069 Services 81,967 1,236 59,916 794 48,945 1,044 Wholesale and retail 238,798 3,466 186,356 2,347 171,687 2,848 Banks and other financial institutions 2,272 11 1,729 8 1,330 8 Communication and information services 27,531 570 25,461 388 22,478 491 Other industries 24,709 397 50,377 215 39,178 234 Consumer 38,055 564 28,621 475 21,933 341 Foreign-excluding MUAH and Krungsri 291,612 5,132 209,297 4,244 159,999 3,127 Loans acquired with deteriorated credit quality 9,974 432 8,591 492 7,814 182 Residential 133,876 1,883 119,409 1,563 107,165 1,620 Card 75,809 2,483 69,831 1,993 66,187 1,614 MUAH 91,690 1,664 83,504 1,993 71,162 2,292 Krungsri 51,597 2,201 75,370 3,899 83,165 4,995 Total ¥ 1,792,059 ¥ 27,911 ¥ 1,484,095 ¥ 23,625 ¥ 1,262,339 ¥ 26,213
Roll-forward of Accrual TDRs and Other Impaired Loans [Table Text Block]	2017 2018 2019 (in millions) Accrual TDRs: Balance at beginning of fiscal year ¥ 613,844 ¥ 819,819 ¥ 670,255 Additions (new accrual TDR status) (1) 492,269 144,368 71,033 Transfers to other impaired loans (including nonaccrual TDRs) (40,182 ) (25,122 ) (19,053 ) Loans sold (1,637 ) (39,378 ) (26 ) Principal payments and other (244,475 ) (229,432 ) (104,558 ) Balance at end of fiscal year (1) ¥ 819,819 ¥ 670,255 ¥ 617,651 Other impaired loans (including nonaccrual TDRs): Balance at beginning of fiscal year ¥ 1,111,306 ¥ 896,031 ¥ 660,868 Additions (new other impaired loans (including nonaccrual TDRs) status) (1)(2) 541,789 281,275 222,003 Charge-off (106,097 ) (98,355 ) (55,309 ) Transfers to accrual TDRs (333,478 ) (43,858 ) (22,110 ) Loans sold (44,984 ) (31,581 ) (26,022 ) Principal payments and other (272,505 ) (342,644 ) (187,290 ) Balance at end of fiscal year (1) ¥ 896,031 ¥ 660,868 ¥ 592,140 Notes: (1) For the fiscal year ended March 31, 2017, lease receivables of ¥875 million and ¥74 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,065 million and ¥389 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2017. For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019. (2) Included in the additions of other impaired loans for the fiscal years ended March 31, 2017, 2018 and 2019 are nonaccrual TDRs as follows: ¥11,699 million, ¥12,002 million and ¥13,493 million—Card; ¥25,023 million, ¥12,799 million and ¥12,738 million—MUFG Americas Holdings; and ¥7,471 million, ¥12,280 million and ¥10,519 million—Krungsri, respectively.
TDRs by Class [Table Text Block]	2017 2018 2019 Troubled Debt Restructurings Pre- Post- Pre- Post- Pre- Post- (in millions) Commercial (1)(3) Domestic ¥ 377,563 ¥ 377,563 ¥ 70,380 ¥ 69,021 ¥ 36,693 ¥ 36,693 Manufacturing 335,347 335,347 35,954 35,954 11,654 11,654 Construction 1,377 1,377 1,020 1,020 703 703 Real estate 7,457 7,457 1,269 1,269 948 948 Services 5,268 5,268 4,139 4,139 2,141 2,141 Wholesale and retail 22,868 22,868 16,280 14,921 19,315 19,315 Banks and other financial institutions — — 246 246 — — Communication and information services 2,405 2,405 9,643 9,643 268 268 Other industries 1,493 1,493 761 761 472 472 Consumer 1,348 1,348 1,068 1,068 1,192 1,192 Foreign-excluding MUAH and Krungsri 58,178 58,178 25,522 25,522 5,692 5,692 Loans acquired with deteriorated credit quality 1,030 1,030 — — 50 50 Residential (1)(3) 13,092 13,092 9,763 9,763 7,379 7,379 Card (2)(3) 17,256 16,759 17,436 16,912 19,685 18,837 MUAH (2)(3) 38,558 38,449 40,578 38,224 19,837 19,837 Krungsri (2)(3) 32,340 32,340 24,015 23,929 24,392 24,330 Total ¥ 538,017 ¥ 537,411 ¥ 187,694 ¥ 183,371 ¥ 113,728 ¥ 112,818 2017 2018 2019 Troubled Debt Restructurings Recorded Investment (in millions) Commercial (1)(3) Domestic ¥ 4,587 ¥ 4,067 ¥ 11,002 Manufacturing 1,373 839 312 Construction 11 — 89 Real estate 38 10 — Services 217 822 473 Wholesale and retail 2,530 2,231 1,713 Banks and other financial institutions — — — Communication and information services 385 140 8,365 Other industries — — 50 Consumer 33 25 — Foreign-excluding MUAH and Krungsri 11,268 — — Loans acquired with deteriorated credit quality — — — Residential (1)(3) 231 159 362 Card (2)(3) 3,661 4,191 3,442 MUAH (2)(3) 6,624 2,565 349 Krungsri (2)(3) 3,984 4,789 7,926 Total ¥ 30,355 ¥ 15,771 ¥ 23,081 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings and Krungsri segments include accrual and nonaccrual loans. (3) For the fiscal year ended March 31, 2017, extension of the stated maturity date of loans was the primary concession type in the Residential segment, reduction in the stated rate was the primary concession type in the Commercial and Card segments and payment deferrals were the primary concession type in the MUFG Americas Holdings and Krungsri segments. For the fiscal year ended March 31, 2018, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and payment deferrals were the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment.
Outstanding Recorded Investment Balances of TDRs by Class [Table Text Block]	2018 2019 (in millions) Commercial (1) Domestic ¥ 482,566 ¥ 445,312 Manufacturing 320,702 311,890 Construction 7,362 4,591 Real estate 33,289 27,657 Services 23,987 17,135 Wholesale and retail 70,119 69,350 Banks and other financial institutions 6 135 Communication and information services 12,837 3,780 Other industries 9,712 6,357 Consumer 4,552 4,417 Foreign-excluding MUAH and Krungsri 54,182 51,701 Residential (1) 40,734 34,449 Card (2) 67,352 65,021 MUAH (2) 65,373 48,128 Krungsri (2) 54,036 62,980 Total ¥ 764,243 ¥ 707,591 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings and Krungsri segments include accrual and nonaccrual loans. Included in the outstanding recorded investment balances as of March 31, 2018 and 2019 are nonaccrual TDRs as follows: ¥38,811 million and ¥38,838 million—Card; ¥26,040 million and ¥14,973 million—MUFG Americas Holdings; and ¥24,855 million and ¥31,069 million—Krungsri, respectively.
Credit Quality Indicators of Loans by Class [Table Text Block]	At March 31, 2018: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,050,274 ¥ 1,690,924 ¥ 271,456 ¥ 51,012,654 Manufacturing 10,215,497 596,662 57,730 10,869,889 Construction 727,932 43,673 9,116 780,721 Real estate 11,379,291 279,931 32,692 11,691,914 Services 2,467,540 175,733 24,081 2,667,354 Wholesale and retail 7,518,383 374,706 77,870 7,970,959 Banks and other financial institutions 4,800,281 10,923 1,145 4,812,349 Communication and information services 1,491,093 48,153 11,958 1,551,204 Other industries 8,780,517 120,466 36,951 8,937,934 Consumer 1,669,740 40,677 19,913 1,730,330 Foreign-excluding MUAH and Krungsri 36,049,123 569,137 108,276 36,726,536 Loans acquired with deteriorated credit quality 12,035 11,728 3,562 27,325 Total ¥ 85,111,432 ¥ 2,271,789 ¥ 383,294 ¥ 87,766,515 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 14,012,978 ¥ 67,258 ¥ 14,080,236 Card ¥ 528,108 ¥ 61,707 ¥ 589,815 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,360,445 ¥ 14,238 ¥ 4,509,044 ¥ 59,890 ¥ 116,842 ¥ 9,060,459 Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 5,284,018 ¥ 198,526 ¥ 123,106 ¥ 5,605,650 At March 31, 2019: Normal Close Watch Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,391,991 ¥ 1,242,075 ¥ 217,745 ¥ 50,851,811 Manufacturing 10,819,594 279,801 47,968 11,147,363 Construction 672,152 37,236 7,857 717,245 Real estate 11,403,613 222,791 22,515 11,648,919 Services 2,436,489 174,784 19,953 2,631,226 Wholesale and retail 7,240,801 329,249 68,736 7,638,786 Banks and other financial institutions 5,199,889 7,654 898 5,208,441 Communication and information services 1,465,652 34,542 10,172 1,510,366 Other industries 8,610,464 119,581 24,947 8,754,992 Consumer 1,543,337 36,437 14,699 1,594,473 Foreign-excluding MUAH and Krungsri 35,418,267 562,854 112,103 36,093,224 Loans acquired with deteriorated credit quality 11,622 10,833 3,790 26,245 Total ¥ 84,821,880 ¥ 1,815,762 ¥ 333,638 ¥ 86,971,280 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,661,794 ¥ 66,290 ¥ 13,728,084 Card ¥ 516,983 ¥ 61,599 ¥ 578,582 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,752,021 ¥ 15,540 ¥ 4,699,698 ¥ 51,948 ¥ 88,356 ¥ 9,607,563 Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 5,682,245 ¥ 199,070 ¥ 129,222 ¥ 6,010,537 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Total loans of MUFG Americas Holdings do not include FDIC covered loans which are not individually rated totaling ¥953 million and ¥689 million as of March 31, 2018 and 2019, respectively. The MUFG Group will be reimbursed for a substantial portion of any future losses on FDIC covered loans under the terms of the FDIC loss share agreements.
Ages of Past Due Loans by Class [Table Text Block]	At March 31, 2018: 1-3 months Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 13,290 ¥ 43,913 ¥ 57,203 ¥ 50,955,451 ¥ 51,012,654 ¥ 6,419 Manufacturing 1,495 1,300 2,795 10,867,094 10,869,889 — Construction 359 437 796 779,925 780,721 — Real estate 2,090 3,225 5,315 11,686,599 11,691,914 1,633 Services 1,025 620 1,645 2,665,709 2,667,354 26 Wholesale and retail 3,886 4,198 8,084 7,962,875 7,970,959 1,349 Banks and other financial institutions — 21 21 4,812,328 4,812,349 — Communication and information services 657 328 985 1,550,219 1,551,204 — Other industries 251 28,315 28,566 8,909,368 8,937,934 — Consumer 3,527 5,469 8,996 1,721,334 1,730,330 3,411 Foreign-excluding MUAH and Krungsri 12,512 19,655 32,167 36,694,369 36,726,536 1,083 Residential 78,073 19,399 97,472 13,974,118 14,071,590 10,806 Card 18,887 32,218 51,105 528,284 579,389 — MUAH 23,145 13,648 36,793 9,009,426 9,046,219 771 Krungsri 116,665 99,315 215,980 5,383,477 5,599,457 — Total ¥ 262,572 ¥ 228,148 ¥ 490,720 ¥ 116,545,125 ¥ 117,035,845 ¥ 19,079 At March 31, 2019: 1-3 months Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 11,551 ¥ 30,648 ¥ 42,199 ¥ 50,809,612 ¥ 50,851,811 ¥ 6,900 Manufacturing 1,597 3,036 4,633 11,142,730 11,147,363 — Construction 218 60 278 716,967 717,245 1 Real estate 2,034 4,256 6,290 11,642,629 11,648,919 2,524 Services 778 569 1,347 2,629,879 2,631,226 1 Wholesale and retail 2,791 2,390 5,181 7,633,605 7,638,786 62 Banks and other financial institutions — 21 21 5,208,420 5,208,441 — Communication and information services 411 758 1,169 1,509,197 1,510,366 — Other industries 365 13,037 13,402 8,741,590 8,754,992 — Consumer 3,357 6,521 9,878 1,584,595 1,594,473 4,312 Foreign-excluding MUAH and Krungsri 10,881 19,993 30,874 36,062,350 36,093,224 236 Residential 62,686 16,615 79,301 13,641,449 13,720,750 6,584 Card 17,203 30,568 47,771 527,421 575,192 — MUAH 28,696 10,827 39,523 9,557,501 9,597,024 2,287 Krungsri 126,313 106,777 233,090 5,771,541 6,004,631 — Total ¥ 257,330 ¥ 215,428 ¥ 472,758 ¥ 116,369,874 ¥ 116,842,632 ¥ 16,007 Note: (1) Total loans in the above table do not include loans held for sale and loans acquired with deteriorated credit quality and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.
Changes in Allowance for Credit Losses by Portfolio Segment [Table Text Block]	Fiscal year ended March 31, 2017: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 816,559 ¥ 58,598 ¥ 31,187 ¥ 108,454 ¥ 96,332 ¥ 1,111,130 Provision for (reversal of) credit losses 177,295 12,224 13,289 (62 ) 50,942 253,688 Charge-offs 108,262 5,339 16,309 32,074 51,774 213,758 Recoveries 21,124 1,853 1,998 2,916 16,058 43,949 Net charge-offs 87,138 3,486 14,311 29,158 35,716 169,809 Others (1) (6,030 ) — — (5,501 ) (1,290 ) (12,821 ) Balance at end of fiscal year ¥ 900,686 ¥ 67,336 ¥ 30,165 ¥ 73,733 ¥ 110,268 ¥ 1,182,188 Fiscal year ended March 31, 2018: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 900,686 ¥ 67,336 ¥ 30,165 ¥ 73,733 ¥ 110,268 ¥ 1,182,188 Provision for (reversal of) credit losses (297,401 ) (22,291 ) 23,422 (9,309 ) 64,732 (240,847 ) Charge-offs 134,807 3,838 22,696 14,701 56,067 232,109 Recoveries 24,913 1,339 1,228 6,140 17,490 51,110 Net charge-offs 109,894 2,499 21,468 8,561 38,577 180,999 Others (1) (2,293 ) — — (2,098 ) 8,173 3,782 Balance at end of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Fiscal year ended March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Provision for (reversal of) credit losses (43,850 ) (4,480 ) 23,809 9,277 49,574 34,330 Charge-offs 76,664 274 24,310 13,224 59,569 174,041 Recoveries 17,565 834 932 3,733 21,053 44,117 Net charge-offs 59,099 (560 ) 23,378 9,491 38,516 129,924 Others (1) 1,466 — — (970 ) (10,842 ) (10,346 ) Balance at end of fiscal year ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Note: (1) Others are principally comprised of gains or losses from foreign exchange translation.
Allowance for Credit Losses and Recorded Investment in Loans by Portfolio Segment [Table Text Block]	At March 31, 2018: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 414,706 ¥ 16,644 ¥ 21,223 ¥ 7,743 ¥ 29,402 ¥ 489,718 Collectively evaluated for impairment 64,375 24,718 10,884 45,571 115,161 260,709 Loans acquired with deteriorated credit quality (2) 12,017 1,184 12 451 33 13,697 Total ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Loans: Individually evaluated for impairment ¥ 977,945 ¥ 110,197 ¥ 66,957 ¥ 82,545 ¥ 84,094 ¥ 1,321,738 Collectively evaluated for impairment 86,761,245 13,961,393 512,432 8,963,679 5,515,363 115,714,112 Loans acquired with deteriorated credit quality (2) 27,325 8,646 10,426 15,188 6,193 67,778 Total (1) ¥ 87,766,515 ¥ 14,080,236 ¥ 589,815 ¥ 9,061,412 ¥ 5,605,650 ¥ 117,103,628 At March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 312,970 ¥ 14,175 ¥ 21,829 ¥ 8,294 ¥ 28,254 ¥ 385,522 Collectively evaluated for impairment 63,366 23,413 10,708 44,282 116,529 258,298 Loans acquired with deteriorated credit quality (2) 13,279 1,038 13 5 29 14,364 Total ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Loans: Individually evaluated for impairment ¥ 879,944 ¥ 102,948 ¥ 64,752 ¥ 69,760 ¥ 83,259 ¥ 1,200,663 Collectively evaluated for impairment 86,065,091 13,617,802 510,440 9,527,264 5,921,372 115,641,969 Loans acquired with deteriorated credit quality (2) 26,245 7,334 3,390 11,228 5,906 54,103 Total (1) ¥ 86,971,280 ¥ 13,728,084 ¥ 578,582 ¥ 9,608,252 ¥ 6,010,537 ¥ 116,896,735 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment.
Loans Acquired with Deteriorated Credit Quality [Table Text Block]	2018 2019 (in millions) Loans acquired during the fiscal year: Contractually required payments receivable at acquisition ¥ 537 ¥ 3,880 Cash flows expected to be collected at acquisition 197 1,449 Fair value of loans at acquisition 197 1,449 Accretable yield for loans within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality: Balance at beginning of fiscal year ¥ 40,917 ¥ 29,672 Additions — — Accretion (14,067 ) (7,178 ) Disposals (11 ) — Reclassifications from (to) nonaccretable difference 3,267 896 Foreign currency translation adjustments (434 ) (230 ) Balance at end of fiscal year ¥ 29,672 ¥ 23,160 Loans within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality: Outstanding balance at beginning of fiscal year ¥ 223,695 ¥ 180,011 Outstanding balance at end of fiscal year 180,011 161,525 Carrying amount at beginning of fiscal year 91,176 67,778 Carrying amount at end of fiscal year 67,778 54,103 Nonaccruing loans within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality: Carrying amount at acquisition date during fiscal year ¥ 197 ¥ 1,449 Carrying amount at end of fiscal year 6,659 6,284 Allowance for credit losses within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality: Balance of allowance for credit losses at beginning of fiscal year ¥ 14,523 ¥ 13,697 Additional provisions during fiscal year 2,285 1,744 Reductions of allowance during fiscal year 732 401 Balance of allowance for credit losses at end of fiscal year 13,697 14,364
Components of Investment in Direct Financing Leases [Table Text Block]	2018 2019 (in millions) Minimum lease payments receivable ¥ 1,862,664 ¥ 1,922,339 Estimated residual values of leased property 31,650 27,468 Less—unearned income (279,081 ) (299,283 ) Net investment in direct financing leases ¥ 1,615,233 ¥ 1,650,524
Future Minimum Lease Payment Receivables under Noncancelable Leasing Agreements [Table Text Block]	Direct (in millions) Fiscal year ending March 31: 2020 ¥ 510,439 2021 425,023 2022 353,355 2023 240,609 2024 171,286 2025 and thereafter 221,627 Total minimum lease payment receivables ¥ 1,922,339

Premises and Equipment _Text _2

Premises and Equipment [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Components of Premises and Equipment [Table Text Block]	2018 2019 (in millions) Land ¥ 370,669 ¥ 362,742 Buildings 739,665 829,606 Equipment and furniture 659,699 648,598 Leasehold improvements 311,645 305,281 Construction in progress 119,195 34,002 Total 2,200,873 2,180,229 Less accumulated depreciation 1,187,285 1,206,629 Premises and equipment-net ¥ 1,013,588 ¥ 973,600

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Movement in Carrying Amount of Goodwill by Business Segment [Table Text Block]	Global Asset Global Total (in millions) Balance at March 31, 2017: Goodwill (1) ¥ 611,827 ¥ 28,134 ¥ 2,300 ¥ 642,261 Accumulated impairment losses (1) (177,750 ) (14,368 ) — (192,118 ) 434,077 13,766 2,300 450,143 Foreign currency translation adjustments and other (8,399 ) (410 ) — (8,809 ) Balance at March 31, 2018: Goodwill 603,428 27,724 2,300 633,452 Accumulated impairment losses (177,750 ) (14,368 ) — (192,118 ) 425,678 13,356 2,300 441,334 Foreign currency translation adjustments and other (7,206 ) (237 ) — (7,443 ) Balance at March 31, 2019: Goodwill 596,222 27,487 2,300 626,009 Accumulated impairment losses (177,750 ) (14,368 ) — (192,118 ) ¥ 418,472 ¥ 13,119 ¥ 2,300 ¥ 433,891 Note: (1) Effective April 1, 2018, the MUFG Group reorganized its business groups. Goodwill originally recognized for Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri was ¥1,900,019 million, which has been fully impaired before April 1, 2017. As these impairment losses recorded in past before the reorganization of the segment and are irrelevant to the annual impairment test under the new segment, the accumulated impaired loss is not allocated to new business segments after the reorganization of business group.
Carrying Amount of Other Intangible Assets by Major Class [Table Text Block]	2018 2019 Gross Accumulated Net carrying Gross Accumulated Net (in millions) Intangible assets subject to amortization: Software ¥ 2,585,161 ¥ 1,852,333 ¥ 732,828 ¥ 2,703,413 ¥ 2,029,775 ¥ 673,638 Core deposit intangibles 128,679 83,382 45,297 126,796 88,643 38,153 Customer relationships 391,832 227,079 164,753 387,936 246,526 141,410 Trade names 77,821 30,801 47,020 77,204 34,283 42,921 Other 9,706 3,977 5,729 9,601 4,220 5,381 Total ¥ 3,193,199 ¥ 2,197,572 995,627 ¥ 3,304,950 ¥ 2,403,447 901,503 Intangible assets not subject to amortization: Other (1) 15,492 25,693 Total ¥ 1,011,119 ¥ 927,196 Note: (1) Intangible assets not subject to amortization includes ¥7,268 million and ¥17,431 million of mortgage servicing rights accounted for at fair value at March 31, 2018 and 2019, respectively.
Estimated Aggregate Amortization Expense for Intangible Assets for Next Five Fiscal Years [Table Text Block]	(in millions) Fiscal year ending March 31: 2020 ¥ 230,962 2021 195,126 2022 160,504 2023 120,350 2024 83,523

Income Taxes _Text Block_ (Tabl

Income Taxes [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income before Income Tax Expense by Jurisdiction [Table Text Block]	2017 2018 2019 (in millions) Domestic income (loss) ¥ (413,499 ) ¥ 803,057 ¥ 228,018 Foreign income 686,042 858,762 642,824 Total ¥ 272,543 ¥ 1,661,819 ¥ 870,842
Details of Current and Deferred Income Tax Expense (Benefit) [Table Text Block]	2017 2018 2019 (in millions) Current: Domestic ¥ 176,415 ¥ 180,109 ¥ 57,303 Foreign 130,406 107,119 123,730 Total 306,821 287,228 181,033 Deferred: Domestic (217,485 ) 116,873 (32,746 ) Foreign 5,117 3,722 (15,050 ) Total (212,368 ) 120,595 (47,796 ) Income tax expense 94,453 407,823 133,237 Income tax expense (benefit) reported in Accumulated OCI relating to: Investment securities 20,237 120,588 15,590 Debt valuation adjustments (3,926 ) (960 ) 4,293 Derivatives qualifying for cash flow hedges (9,443 ) (4,421 ) (1,845 ) Defined benefit plans 48,504 50,774 (38,229 ) Foreign currency translation adjustments (1,957 ) (34,527 ) 15,148 Total 53,415 131,454 (5,043 ) Total ¥ 147,868 ¥ 539,277 ¥ 128,194
Reconciliation of Effective Income Tax Rate [Table Text Block]	2017 2018 2019 Combined normal effective statutory tax rate 31.5 % 30.6 % 30.6 % Nondeductible expenses 2.0 0.2 0.5 Impairment of goodwill 0.8 — — Foreign tax credit and payments (9.6 ) (1.7 ) (3.3 ) Lower tax rates applicable to income of subsidiaries (0.2 ) (0.4 ) (2.5 ) Change in valuation allowance 25.4 (3.0 ) (1.4 ) Nontaxable dividends received (12.5 ) (2.0 ) (9.1 ) Undistributed earnings of subsidiaries 3.5 0.7 0.6 Tax and interest expense for uncertainty in income taxes (0.6 ) 0.0 0.6 Noncontrolling interest income 5.4 0.1 0.2 Effect of changes in tax laws (9.8 ) (0.6 ) 0.0 Other—net (1.2 ) 0.6 (0.9 ) Effective income tax rate 34.7 % 24.5 % 15.3 %
Components of Net Deferred Tax Assets [Table Text Block]	2018 2019 (in millions) Deferred tax assets: Allowance for credit losses ¥ 337,718 ¥ 301,222 Operating loss carryforwards 167,355 177,143 Loans 3,483 691 Accrued liabilities and other 133,728 236,363 Premises and equipment, including sale-and-leaseback 120,505 158,144 Derivative financial instruments 111,677 101,118 Defined benefit plans — 5,238 Valuation allowance (215,130 ) (218,191 ) Total deferred tax assets 659,336 761,728 Deferred tax liabilities: Investment securities (including trading account assets at fair value under the fair value option) 973,390 911,483 Intangible assets 52,396 38,772 Lease transactions 83,445 65,115 Defined benefit plans 15,484 — Other 119,970 280,701 Total deferred tax liabilities 1,244,685 1,296,071 Net deferred tax assets (liabilities) ¥ (585,349 ) ¥ (534,343 )
Operating Loss Carryforwards and Tax Credit Carryforwards [Table Text Block]	Operating loss Tax credit (in millions) Fiscal year ending March 31: 2020 ¥ 33,066 ¥ 700 2021 12,727 194 2022 23,346 230 2023 68,850 232 2024 105,110 182 2025 167,035 117 2026 and thereafter 95,686 46,239 No definite expiration date 22,062 4,652 Total ¥ 527,882 ¥ 52,546
Roll-forward of Unrecognized Tax Benefits [Table Text Block]	2017 2018 2019 (in millions) Balance at beginning of fiscal year ¥ 9,950 ¥ 7,851 ¥ 12,917 Gross amount of increases for current year’s tax positions 888 427 313 Gross amount of increases for prior years’ tax positions 1,014 6,642 8,836 Gross amount of decreases for prior years’ tax positions (95 ) (455 ) (1,090 ) Net amount of changes relating to settlements with tax authorities (39 ) (1,074 ) — Decreases due to lapse of applicable statutes of limitations (3,437 ) (253 ) (1,540 ) Foreign exchange translation and others (430 ) (221 ) (276 ) Balance at end of fiscal year ¥ 7,851 ¥ 12,917 ¥ 19,160
Roll-forward of Interest and Penalties Recognized [Table Text Block]	2017 2018 2019 (in millions) Balance at beginning of fiscal year ¥ 4,727 ¥ 4,054 ¥ 4,564 Total interest and penalties in the consolidated statements of income (591 ) 694 (1,655 ) Total cash settlements, foreign exchange translation and others (82 ) (184 ) 147 Balance at end of fiscal year ¥ 4,054 ¥ 4,564 ¥ 3,056
Status of Years under Audit or Open to Examination by Major Tax Jurisdictions [Table Text Block]	Jurisdiction Tax years Japan 2018 and forward United States—Federal 2014 and forward United States—California 2015 and forward Thailand 2012 and forward Indonesia 2017 and forward

Pledged Assets and Collateral_2

Pledged Assets and Collateral [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Assets Mortgaged Pledged or Otherwise Subject to Lien [Table Text Block]	2019 (in millions) Trading account securities ¥ 8,921,825 Investment securities 7,907,010 Loans 14,192,075 Other 51,714 Total ¥ 31,072,624
Pledged Assets Classified by Type of Liabilities [Table Text Block]	2019 (in millions) Deposits ¥ 223,075 Payables under repurchase agreements and securities lending transactions 16,316,732 Other short-term borrowings and long-term debt 14,522,393 Other 10,424 Total ¥ 31,072,624

Deposits _Text Block_ (Tables)

Deposits [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Time Deposits by Maturity [Table Text Block]	Domestic Foreign (in millions) Due in one year or less ¥ 33,351,324 ¥ 23,559,245 Due after one year through two years 4,987,763 1,145,596 Due after two years through three years 2,688,960 351,794 Due after three years through four years 539,629 146,985 Due after four years through five years 574,244 22,104 Due after five years 836,549 29,634 Total ¥ 42,978,469 ¥ 25,255,358

Call Money and Funds Purchase_2

Call Money and Funds Purchased [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Summary of Funds Transactions [Table Text Block]	2018 2019 (in millions, except percentages and days) Outstanding at end of fiscal year: Amount ¥ 2,452,543 ¥ 2,450,320 Principal range of maturities 1 day to 30 days 1 day to 30 days Weighted average interest rate 0.31 % 0.12 %

Due to Trust Account _Text Bl_2

Due to Trust Account [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Summary of Due to Trust Account Transactions [Table Text Block]	2018 2019 (in millions, except percentages) Amount outstanding at end of fiscal year ¥ 3,386,158 ¥ 2,735,952 Weighted average interest rate on outstanding balance at end of fiscal year 0.00 % 0.00 %

Short-term Borrowings and Lon_2

Short-term Borrowings and Long-term Debt [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Components of Other Short-term Borrowings [Table Text Block]	2018 2019 (in millions, except percentages) Domestic offices: Commercial paper ¥ 1,094,487 ¥ 1,033,568 Borrowings from the Bank of Japan 305,520 241,070 Borrowings from other financial institutions 243,968 227,482 Other 84,620 122,166 Total domestic offices 1,728,595 1,624,286 Foreign offices: Commercial paper 4,275,278 3,929,636 Borrowings from other financial institutions 784,949 967,901 Short-term debentures 18,523 68,492 Other 73,917 141,803 Total foreign offices 5,152,667 5,107,832 Total 6,881,262 6,732,118 Less unamortized discount 138 1,045 Other short-term borrowings—net ¥ 6,881,124 ¥ 6,731,073 Weighted average interest rate on outstanding balance at end of fiscal year 1.29 % 1.97 %
Components of Long-term Debt [Table Text Block]	2018 2019 (in millions) MUFG: Obligations under capital leases ¥ 1,973 ¥ 1,725 Unsubordinated debt (1) Fixed rate bonds, payable in US dollars, due 2021-2039, principally 2.19%-4.29% 1,737,809 2,949,022 Fixed rate bonds, payable in Euro, due 2021-2033, principally 0.40%-1.75% 230,629 301,124 Fixed rate bonds, payable in other currencies, due 2025-2027, principally 3.55%-4.05% (2) 17,639 21,257 Floating rate bonds, payable in US dollars, due 2021-2023, principally 3.31%-4.51% 424,795 765,188 Floating rate bonds, payable in Euro, due 2023, principally 0.24% — 43,596 Total 2,410,872 4,080,187 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2024-2030, principally 0.37%-1.39% 482,662 618,925 Adjustable rate bonds, payable in Japanese yen, due 2024-2028, principally 0.30%-0.66% 795,944 890,359 Adjustable rate bonds, payable in Japanese yen, no stated maturity, principally 1.03%-4.42% 1,557,610 1,706,695 Adjustable rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.46%-0.50% 32,500 32,500 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 1.17%-4.78% 1,500 45,960 Floating rate bonds, payable in Japanese yen, no stated maturity, principally 3.00% 3,500 3,500 Floating rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.57%-0.79% 76,000 86,000 Total 2,949,716 3,383,939 Total 5,362,561 7,465,851 MUFG Bank: Obligations under capital leases ¥ 6,906 ¥ 7,704 Obligation under sale-and-leaseback 41,892 40,732 Unsubordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2019-2027, principally 0.22%-2.69% 346,800 234,500 Fixed rate bonds, payable in US dollars, due 2019-2049, principally 0.00%-4.70% 1,451,745 1,284,812 Fixed rate bonds, payable in Euro, due 2022-2037, principally 0.88%-2.06% 111,956 112,687 Fixed rate bonds, payable in other currencies, due 2021-2047, principally 0.00%-5.30% (2) 19,502 19,084 Fixed rate borrowings, payable in Japanese yen, due 2019-2028, principally 0.00%-0.25% 9,561,784 10,786,372 Fixed rate borrowings, payable in US dollars, due 2018, principally 7.49% 38 — Fixed rate borrowings, payable in Euro, due 2026, principally 0.00% 1,044 — Fixed rate borrowings, payable in other currencies, due 2030, principally 2.93% (2) — 9,483 Adjustable rate bonds, payable in US dollars, due 2030, principally 3.00% 1,062 1,110 Floating rate bonds, payable in US dollars, due 2018, principally 3.13% 53,120 — Floating rate borrowings, payable in US dollars, due 2019-2031, principally 2.64%-3.34% 1,071,239 1,008,949 Floating rate borrowings, payable in Euro, due 2021-2022, principally 0.00%-0.06% 20,150 15,382 Floating rate borrowings, payable in other currencies, due 2028, principally 3.23% (2) — 5,240 Total 12,638,440 13,477,619 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2019-2031, principally 1.31%-2.91% 520,350 513,420 Fixed rate borrowings, payable in Japanese yen, due 2022-2035, principally 0.37%-2.24% 98,400 73,400 Adjustable rate borrowings, payable in Japanese yen, due 2024-2028, principally 0.37%-2.56% 73,000 20,000 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 2.67%-4.78% 496,000 355,000 Floating rate borrowings, payable in Japanese yen, due 2027, principally 0.19% 15,000 15,000 Total 1,202,750 976,820 Obligations under loan securitization transaction accounted for as secured borrowings due 2019-2078, principally 0.13%-6.90% 622,061 639,037 Total 14,512,049 15,141,912 Other subsidiaries: Obligations under capital leases ¥ 9,835 ¥ 13,107 Unsubordinated debt (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2044, principally 0.00%-20.00% 3,453,352 1,291,537 Fixed rate borrowings, bonds and notes, payable in US dollars, due 2019-2037, principally 0.00%-34.00% 936,086 1,385,936 Fixed rate borrowings, bonds and notes, payable in Euro, due 2020-2026, principally 0.15%-1.28% 2,619 2,479 Fixed rate borrowings, bonds and notes, payable in Thai baht, due 2019-2025, principally 0.01%-7.15% 330,814 334,586 Fixed rate borrowings, bonds and notes, payable in other currencies, due 2019-2037, principally 0.00%-15.33% (2) 190,567 219,781 Floating/Adjustable rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2048, principally 0.00%-7.70% 1,342,318 1,425,387 Floating rate borrowings, bonds and notes, payable in US dollars, due 2019-2028, principally 0.00%-27.00% 186,515 244,253 Floating rate borrowings, bonds and notes, payable in other currencies, due 2019-2022, principally 1.43%-3.41% (2) 5,420 6,241 Total 6,447,691 4,910,200 Subordinated debt (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2030, principally 0.65%-2.61% 364,326 269,373 Fixed rate bonds and notes, payable in US dollars, due 2019-2027, principally 7.50%-10.85% 1,661 1,409 Fixed rate bonds and notes, payable in Thai baht, due 2020-2027, principally 3.40%-3.90% 144,900 143,212 Fixed rate bonds and notes, payable in other currencies, due 2021, principally 0.00% (2) 7,428 7,347 Adjustable rate borrowings, bonds and notes, payable in Japanese yen, no stated maturity, principally 2.83% 104,500 4,500 Floating rate borrowings, bonds and notes, payable in Japanese yen, due 2019-2021, principally 0.53%-0.73% 72,493 41,000 Floating rate bonds and notes, payable in US dollars, due 2019-2036, principally 4.49%-11.86% 5,250 5,172 Total 700,558 472,013 Obligations under loan securitization transaction accounted for as secured borrowings due 2020-2022, principally 1.10%-2.20% 50,551 2,813 Total 7,208,635 5,398,133 Total 27,083,245 28,005,896 Debt Issuance Cost ¥ (13,689 ) ¥ (15,353 ) Total ¥ 27,069,556 ¥ 27,990,543 Notes: (1) Adjustable rate debts are debts where interest rates are reset in accordance with the terms of the debt agreements, and floating rate debts are debts where interest rates are repriced in accordance with movements of markets indices. (2) Minor currencies, such as Australian dollars, British pounds, Indonesian rupiah, Brazilian real, Russian ruble, etc, have been summarized into the “other currencies” classification.
Summary of Subsequent Maturities of Long-term Debt [Table Text Block]	MUFG BK Other Total (in millions) Fiscal year ending March 31: 2020 ¥ 450 ¥ 1,551,272 ¥ 1,502,213 ¥ 3,053,935 2021 685,348 8,552,229 895,647 10,133,224 2022 1,172,368 2,166,840 720,272 4,059,480 2023 746,235 663,227 580,257 1,989,719 2024 265,873 315,828 414,380 996,081 2025 and thereafter 4,595,577 1,892,516 1,285,364 7,773,457 Total ¥ 7,465,851 ¥ 15,141,912 ¥ 5,398,133 ¥ 28,005,896

Severance Indemnities and Pen_2

Severance Indemnities and Pension Plans [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Components of Net Periodic Cost of Pension Benefits and Other Benefits [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2017 2018 2019 2017 2018 2019 Pension Pension Pension Pension Other Pension Other Pension Other (in millions) Service cost—benefits earned during the fiscal year ¥ 49,057 ¥ 47,064 ¥ 48,352 ¥ 13,107 ¥ 990 ¥ 10,169 ¥ 676 ¥ 12,395 ¥ 525 Interest cost on projected benefit obligation 12,308 14,383 13,504 15,287 1,229 15,359 1,079 14,958 1,046 Expected return on plan assets (60,255 ) (68,432 ) (74,270 ) (29,339 ) (2,047 ) (32,110 ) (2,122 ) (33,266 ) (2,314 ) Amortization of net actuarial loss 17,764 7,309 731 12,707 1,366 8,847 1,124 9,993 707 Amortization of prior service cost (6,348 ) (1,094 ) (1,210 ) (2,045 ) (1,534 ) (3,090 ) (2,775 ) (3,039 ) (2,020 ) Loss (gain) on settlements and curtailment (1,765 ) (4,394 ) (5,980 ) (208 ) — 52 — 49 — Net periodic benefit cost (income) ¥ 10,761 ¥ (5,164 ) ¥ (18,873 ) ¥ 9,509 ¥ 4 ¥ (773 ) ¥ (2,018 ) ¥ 1,090 ¥ (2,056 )
Summary of Assumptions Used in Computation [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2017 2018 2019 2017 2018 2019 Pension Pension Pension Pension Other Pension Other Pension Other Weighted-average assumptions used: Discount rates in determining expense 0.68 % 0.82 % 0.76 % 3.90 % 3.03 % 3.52 % 3.61 % 3.19 % 3.27 % Discount rates in determining benefit obligation 0.82 0.76 0.61 3.81 3.86 3.38 3.43 3.87 3.99 Rates of increase in future compensation level for determining expense 3.23 3.23 3.21 4.65 — 4.65 — 4.65 — Rates of increase in future compensation level for determining benefit obligation 3.23 3.21 3.21 4.65 — 4.65 — 5.01 — Expected rates of return on plan assets 2.75 2.87 2.83 6.80 7.50 6.71 7.50 6.70 7.50
Assumed Health Care Cost Trend Rates and Effect of a One-percentage-point Change for Foreign Offices and Subsidiaries [Table Text Block]	MUAH Other than MUAH 2018 (1) 2019 (1) 2018 (1) 2019 (1) Initial trend rate 4.44 % 4.44 % 7.00 % 7.00 % Ultimate trend rate 3.94 % 3.94 % 4.50 % 4.50 % Year the rate reaches the ultimate trend rate 2026 2027 2026 2027 MUAH Other than MUAH One-percentage- One-percentage- One-percentage- One-percentage- (in millions) Effect on total of service and interest cost components ¥ 183 ¥ (152 ) ¥ 44 ¥ (35 ) Effect on postretirement benefit obligation 3,110 (2,630 ) 812 (644 ) Note: (1) Fiscal years of MUFG Americas Holdings and foreign subsidiaries end on December 31. Therefore, the above tables present the rates and amounts at December 31, 2017 and 2018, respectively.
Combined Funded Status and Amounts Recognized in Consolidated Balance Sheets [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2018 2019 Non-contributory Non-contributory Pension Other Pension Other (in millions) Change in benefit obligation: Benefit obligation at beginning of fiscal year ¥ 1,793,848 ¥ 1,821,794 ¥ 478,463 ¥ 35,222 ¥ 502,056 ¥ 34,347 Service cost 47,064 48,352 10,169 676 12,395 525 Interest cost 14,383 13,504 15,359 1,079 14,958 1,046 Plan participants’ contributions — — 28 455 37 452 Acquisitions/ Divestitures (29 ) (160 ) — — (17 ) — Amendments — — — — 64 — Actuarial loss (gain) 49,678 43,527 25,519 506 (28,466 ) (2,354 ) Benefits paid (67,913 ) (66,539 ) (19,388 ) (2,520 ) (19,894 ) (2,221 ) Lump-sum (15,237 ) (18,594 ) (861 ) — (1,750 ) — Translation adjustments and other — — (7,233 ) (1,071 ) (10,303 ) (285 ) Benefit obligation at end of fiscal year 1,821,794 1,841,884 502,056 34,347 469,080 31,510 Change in plan assets: Fair value of plan assets at beginning of fiscal year 2,346,310 2,603,329 477,479 30,339 542,646 32,466 Actual return on plan assets 250,704 13,664 75,824 4,890 (21,353 ) (1,948 ) Employer contributions 74,181 44,427 16,969 190 3,117 102 Acquisitions/ Divestitures 47 (93 ) — — — — Plan participants’ contributions — — 28 455 37 452 Benefits paid (67,913 ) (66,539 ) (19,388 ) (2,520 ) (19,894 ) (2,221 ) Translation adjustments and other — — (8,266 ) (888 ) (11,058 ) (593 ) Fair value of plan assets at end of fiscal year 2,603,329 2,594,788 542,646 32,466 493,495 28,258 Amounts recognized in the consolidated balance sheets: Prepaid benefit cost ¥ 798,849 ¥ 770,564 ¥ 83,578 ¥ 2,552 ¥ 67,821 ¥ 1,372 Accrued benefit cost (17,314 ) (17,660 ) (42,988 ) (4,433 ) (43,406 ) (4,624 ) Net amount recognized ¥ 781,535 ¥ 752,904 ¥ 40,590 ¥ (1,881 ) ¥ 24,415 ¥ (3,252 )
Aggregated Accumulated Benefit Obligations [Table Text Block]	Domestic Foreign offices 2018 2019 2018 2019 (in millions) Aggregated accumulated benefit obligations ¥ 1,784,837 ¥ 1,800,992 ¥ 475,522 ¥ 457,048
Summary for Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Table Text Block]	Domestic Foreign offices 2018 2019 2018 2019 (in millions) Projected benefit obligations ¥ 22,445 ¥ 23,108 ¥ 62,511 ¥ 63,273 Accumulated benefit obligations 22,445 23,108 52,012 52,249 Fair value of plan assets 5,272 5,629 19,521 19,866
Amounts Recognized in Accumulated OCI [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2018 2019 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss ¥ 135,656 ¥ 245,037 ¥ 111,820 ¥ 7,449 ¥ 126,238 ¥ 8,628 Prior service cost (6,669 ) (5,459 ) (17,936 ) (6,237 ) (14,536 ) (4,263 ) Gross amount recognized in Accumulated OCI 128,987 239,578 93,884 1,212 111,702 4,365 Taxes (81,747 ) (115,816 ) (25,251 ) (358 ) (29,875 ) (1,282 ) Net amount recognized in Accumulated OCI ¥ 47,240 ¥ 123,762 ¥ 68,633 ¥ 854 ¥ 81,827 ¥ 3,083
Amounts Recognized in OCI [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2018 2019 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss (gain) arising during the year ¥ (132,593 ) ¥ 104,132 ¥ (18,165 ) ¥ (2,262 ) ¥ 26,155 ¥ 1,908 Prior service cost arising during the year — — — — 65 — Losses (gains) due to amortization: Net actuarial loss (7,309 ) (731 ) (8,847 ) (1,124 ) (9,993 ) (707 ) Prior service cost 1,094 1,210 3,090 2,775 3,039 2,020 Curtailment and settlement 4,394 5,980 (52 ) — (49 ) — Foreign currency translation adjustments — — (3,502 ) (36 ) (1,399 ) (68 ) Total changes in Accumulated OCI ¥ (134,414 ) ¥ 110,591 ¥ (27,476 ) ¥ (647 ) ¥ 17,818 ¥ 3,153
Expected Amounts that Will be Amortized from Accumulated OCI in Next Fiscal Year [Table Text Block]	Domestic Foreign offices Pension Pension Other (in millions) Net actuarial loss ¥ 5,395 ¥ 7,731 ¥ 1,130 Prior service cost (1,269 ) (3,056 ) (1,916 ) Total ¥ 4,126 ¥ 4,675 ¥ (786 )
Weighted-average Target Asset Allocation of Plan Assets for Pension Benefits and Other Benefits [Table Text Block]	Domestic Foreign offices Asset category Pension Pension Other Japanese equity securities 39.3 % 0.3 % — % Japanese debt securities 32.1 — — Non-Japanese 14.9 48.5 70.0 Non-Japanese 9.1 39.1 30.0 Real estate 1.3 9.9 — Short-term assets 3.3 2.2 — Total 100.0 % 100.0 % 100.0 %
Expected Contributions to Plan Assets in Next Fiscal Year [Table Text Block]	For the pension benefits of domestic subsidiaries ¥ 32.7 billion For the pension benefits of foreign offices and subsidiaries 0.7 billion For the other benefits of foreign offices and subsidiaries 0.4 billion
Estimated Future Benefit Payments [Table Text Block]	Domestic Foreign offices Pension Pension Other (in millions) Fiscal year ending March 31: 2020 ¥ 84,558 ¥ 19,923 ¥ 1,997 2021 82,297 20,928 2,072 2022 82,320 21,903 2,129 2023 81,710 22,881 2,177 2024 81,684 23,726 2,205 Thereafter (2025-2029) 401,772 162,850 10,222
Reconciliation of Plan Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3) [Table Text Block]	Domestic subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other debt securities ¥ 208 ¥ (6 ) ¥ (18 ) ¥ 887 ¥ — ¥ — ¥ 1,071 Other investment funds 206 36 — (242 ) — — — Total ¥ 414 ¥ 30 ¥ (18 ) ¥ 645 ¥ — ¥ — ¥ 1,071 Foreign offices and subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other investments ¥ 760 ¥ 51 ¥ (2 ) ¥ (654 ) ¥ — ¥ — ¥ 155 Total ¥ 760 ¥ 51 ¥ (2 ) ¥ (654 ) ¥ — ¥ — ¥ 155 Domestic subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other debt securities ¥ 1,071 ¥ 4 ¥ 49 ¥ (94 ) ¥ — ¥ — ¥ 1,030 Total ¥ 1,071 ¥ 4 ¥ 49 ¥ (94 ) ¥ — ¥ — ¥ 1,030 Foreign offices and subsidiaries Assets category March 31, Realized Unrealized Purchase, Transfer Transfer March 31, (in millions) Other investments ¥ 155 ¥ — ¥ (3 ) ¥ 36 ¥ — ¥ — ¥ 188 Total ¥ 155 ¥ — ¥ (3 ) ¥ 36 ¥ — ¥ — ¥ 188
Pension Benefits [Member]
Fair Values of Certain Investments Valued at Net Asset per Share (or Its Equivalent) [Table Text Block]	Domestic subsidiaries Foreign offices and Assets category 2018 2019 2018 2019 (in millions) Japanese pooled funds: Japanese marketable equity securities ¥ 83,205 ¥ 109,915 ¥ — ¥ — Japanese debt securities 252,730 184,121 — — Non-Japanese 151,893 162,901 — — Non-Japanese 100,998 155,792 — — Other 135,275 134,306 — — Total pooled funds 724,101 747,035 — — Other investment funds 458,851 (1) 525,083 (1) 279,965 (2) 241,559 (2) Total ¥ 1,182,952 ¥ 1,272,118 ¥ 279,965 ¥ 241,559 Notes: (1) Other investment funds of the domestic subsidiaries include mutual funds and real estate funds of ¥433,221 million and ¥13,664 million, respectively, at March 31, 2018 and ¥500,850 million and ¥12,058 million, respectively, at March 31, 2019. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds, real estate funds and common collective funds of ¥63,088 million, ¥40,205 million and ¥158,249 million, respectively, at March 31, 2018 and ¥53,775 million, ¥46,818 million and ¥140,728 million, respectively, at March 31, 2019.
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Fair Value of Each Major Category of Plan Assets [Table Text Block]	At March 31, 2018 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 139,847 ¥ — ¥ — ¥ 139,847 ¥ — ¥ — ¥ — ¥ — Non-Japanese 15,552 944 — 16,496 17,945 4,081 — 22,026 Other debt securities 201 3,482 1,071 4,754 — 81,968 — 81,968 Japanese marketable equity securities 934,691 — — 934,691 887 — — 887 Non-Japanese 71,729 255 — 71,984 42,166 815 — 42,981 Other investment funds — — — — 99,798 9,997 — 109,795 (2) Japanese general account of life insurance companies (1) — 225,925 — 225,925 — — — — Other investments 3,485 23,195 — 26,680 2 4,867 155 5,024 Total ¥ 1,165,505 ¥ 253,801 ¥ 1,071 ¥ 1,420,377 ¥ 160,798 ¥ 101,728 ¥ 155 ¥ 262,681 At March 31, 2019 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 146,060 ¥ — ¥ — ¥ 146,060 ¥ — ¥ — ¥ — ¥ — Non-Japanese 8,570 656 — 9,226 38,687 4,615 — 43,302 Other debt securities 109 3,698 1,030 4,837 — 100,462 — 100,462 Japanese marketable equity securities 855,353 — — 855,353 — — — — Non-Japanese 64,957 234 — 65,191 20,569 652 — 21,221 Other investment funds — — — — 73,286 9,044 — 82,330 (2) Japanese general account of life insurance companies (1) — 222,460 — 222,460 — — — — Other investments 917 18,626 — 19,543 18 4,415 188 4,621 Total ¥ 1,075,966 ¥ 245,674 ¥ 1,030 ¥ 1,322,670 ¥ 132,560 ¥ 119,188 ¥ 188 ¥ 251,936 Notes: (1) “Japanese general accounts of life insurance companies” is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2017 to March 31, 2018 and 1.24% from April 1, 2018 to March 31, 2019. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds and real estate funds of ¥93,821 million and ¥516 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥68,556 million and nil, respectively, at December 31, 2018.
Foreign Offices and Subsidiaries [Member] | Pension Benefits and SIPs [Member]
Fair Value of Each Major Category of Plan Assets [Table Text Block]	At March 31, 2018 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 139,847 ¥ — ¥ — ¥ 139,847 ¥ — ¥ — ¥ — ¥ — Non-Japanese 15,552 944 — 16,496 17,945 4,081 — 22,026 Other debt securities 201 3,482 1,071 4,754 — 81,968 — 81,968 Japanese marketable equity securities 934,691 — — 934,691 887 — — 887 Non-Japanese 71,729 255 — 71,984 42,166 815 — 42,981 Other investment funds — — — — 99,798 9,997 — 109,795 (2) Japanese general account of life insurance companies (1) — 225,925 — 225,925 — — — — Other investments 3,485 23,195 — 26,680 2 4,867 155 5,024 Total ¥ 1,165,505 ¥ 253,801 ¥ 1,071 ¥ 1,420,377 ¥ 160,798 ¥ 101,728 ¥ 155 ¥ 262,681 At March 31, 2019 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 146,060 ¥ — ¥ — ¥ 146,060 ¥ — ¥ — ¥ — ¥ — Non-Japanese 8,570 656 — 9,226 38,687 4,615 — 43,302 Other debt securities 109 3,698 1,030 4,837 — 100,462 — 100,462 Japanese marketable equity securities 855,353 — — 855,353 — — — — Non-Japanese 64,957 234 — 65,191 20,569 652 — 21,221 Other investment funds — — — — 73,286 9,044 — 82,330 (2) Japanese general account of life insurance companies (1) — 222,460 — 222,460 — — — — Other investments 917 18,626 — 19,543 18 4,415 188 4,621 Total ¥ 1,075,966 ¥ 245,674 ¥ 1,030 ¥ 1,322,670 ¥ 132,560 ¥ 119,188 ¥ 188 ¥ 251,936 Notes: (1) “Japanese general accounts of life insurance companies” is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2017 to March 31, 2018 and 1.24% from April 1, 2018 to March 31, 2019. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds and real estate funds of ¥93,821 million and ¥516 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥68,556 million and nil, respectively, at December 31, 2018.
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Fair Value of Each Major Category of Plan Assets [Table Text Block]	Foreign offices and subsidiaries 2018 2019 Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Non-Japanese ¥ 2,523 ¥ — ¥ — ¥ 2,523 ¥ 1,705 ¥ — ¥ — ¥ 1,705 Other debt securities — 5,797 — 5,797 — 6,124 — 6,124 Non-Japanese — 7 — 7 — 6 — 6 Other investment funds (1) 6,082 — — 6,082 5,487 — — 5,487 Other investments 1 264 — 265 — 130 — 130 Total ¥ 8,606 ¥ 6,068 ¥ — ¥ 14,674 ¥ 7,192 ¥ 6,260 ¥ — ¥ 13,452 Note: (1) Other investment funds mainly consist of mutual funds.
Fair Values of Certain Investments Valued at Net Asset per Share (or Its Equivalent) [Table Text Block]	Foreign offices Assets category 2018 2019 (in millions) Other investment funds (1) ¥ 17,792 ¥ 14,806 Total ¥ 17,792 ¥ 14,806 Note: (1) Other investment funds of the foreign offices and subsidiaries include mutual funds, common collective funds and pooled separate accounts with variable life insurance policies of ¥553 million, ¥11,332 million and ¥5,907 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥147 million, ¥9,583 million and ¥5,076 million, respectively, at December 31, 2018.

Other Assets and Liabilities _2

Other Assets and Liabilities [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Major Components of Other Assets and Liabilities [Table Text Block]	2018 2019 (in millions) Other assets: Accounts receivable: Receivables from brokers, dealers and customers for securities transactions ¥ 1,017,194 ¥ 1,141,075 Other 1,190,885 1,394,794 Investments in equity method investees 2,219,196 2,487,389 Prepaid benefit cost (Note 13) 884,979 839,757 Cash collateral pledged for derivative transactions (Note 8) 1,473,109 1,276,897 Cash collateral for the use of Bank of Japan’s settlement infrastructure 851,066 911,528 Other 3,029,635 2,990,462 Total ¥ 10,666,064 ¥ 11,041,902 Other liabilities: Accounts payable: Payables to brokers, dealers and customers for securities transactions ¥ 1,247,652 ¥ 1,289,672 Other 1,357,387 1,308,733 Deferred tax liabilities 654,053 624,062 Allowance for off-balance 81,739 119,307 Accrued benefit cost (Note 13) 64,735 65,690 Guarantees and indemnifications 41,349 45,346 Cash collateral received for derivative transactions (Note 8) 1,158,053 844,234 Accrued and other liabilities 2,802,445 3,061,462 Total ¥ 7,407,413 ¥ 7,358,506
Morgan Stanley [Member]
Summarized Financial Information [Table Text Block]	2018 2019 (in billions) Trading assets ¥ 29,008 ¥ 29,392 Securities purchased under agreements to resell 8,525 10,718 Securities borrowed 14,431 15,416 Total assets 91,207 97,223 Deposits 17,043 19,948 Customer and other payables 20,709 21,431 Borrowings 20,713 21,165 Total liabilities 82,762 88,134 Noncontrolling interests 155 130 2017 2018 2019 (in billions) Net revenues ¥ 3,939 ¥ 4,354 ¥ 4,365 Total non-interest 2,871 3,133 3,170 Income from continuing operations before income taxes 1,068 1,221 1,195 Net income applicable to Morgan Stanley 730 759 944
Equity Method Investees Other than Morgan Stanley [Member]
Summarized Financial Information [Table Text Block]	2018 2019 (in billions) Net loans ¥ 14,343 ¥ 15,772 Total assets 26,008 28,910 Deposits 7,783 9,103 Total liabilities 21,209 23,423 Noncontrolling interests 1,009 1,135 2017 2018 2019 (in billions) Total interest income ¥ 777 ¥ 901 ¥ 1,036 Total interest expense 252 329 430 Net interest income 525 572 606 Provision for credit losses 97 136 157 Income before income tax expense 147 337 205 Net income 97 229 135

Offsetting of Derivatives, Re_2

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Summary of Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Table Text Block]	At March 31, 2018 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 12,585 ¥ — ¥ 12,585 ¥ (9,664 ) ¥ (832 ) ¥ 2,089 Receivables under resale agreements 8,825 (3,099 ) 5,726 (5,171 ) (17 ) 538 Receivables under securities borrowing transactions 9,305 (36 ) 9,269 (9,208 ) (1 ) 60 Total ¥ 30,715 ¥ (3,135 ) ¥ 27,580 ¥ (24,043 ) ¥ (850 ) ¥ 2,687 Financial liabilities: Derivative liabilities ¥ 11,877 ¥ — ¥ 11,877 ¥ (9,631 ) ¥ (1,126 ) ¥ 1,120 Payables under repurchase agreements 21,169 (3,034 ) 18,135 (17,890 ) (31 ) 214 Payables under securities lending transactions 8,206 (36 ) 8,170 (8,139 ) (12 ) 19 Obligations to return securities received as collateral 3,177 — 3,177 (1,072 ) — 2,105 Total ¥ 44,429 ¥ (3,070 ) ¥ 41,359 ¥ (36,732 ) ¥ (1,169 ) ¥ 3,458 At March 31, 2019 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 13,205 ¥ — ¥ 13,205 ¥ (10,752 ) ¥ (590 ) ¥ 1,863 Receivables under resale agreements 13,885 (2,910 ) 10,975 (9,793 ) (20 ) 1,162 Receivables under securities borrowing transactions 2,759 — 2,759 (2,693 ) — 66 Total ¥ 29,849 ¥ (2,910 ) ¥ 26,939 ¥ (23,238 ) ¥ (610 ) ¥ 3,091 Financial liabilities: Derivative liabilities ¥ 12,710 ¥ — ¥ 12,710 ¥ (10,671 ) ¥ (933 ) ¥ 1,106 Payables under repurchase agreements 28,125 (2,900 ) 25,225 (24,930 ) (15 ) 280 Payables under securities lending transactions 913 — 913 (880 ) — 33 Obligations to return securities received as collateral 3,087 — 3,087 (1,244 ) — 1,843 Total ¥ 44,835 ¥ (2,900 ) ¥ 41,935 ¥ (37,725 ) ¥ (948 ) ¥ 3,262

Repurchase Agreements, and Se_2

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Gross Obligations by Remaining Contractual Maturity and Class of Collateral Pledged [Table Text Block]	March 31, 2018 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 2,290 ¥ 14,328 ¥ 2,004 ¥ 2,547 ¥ 21,169 Payables under securities lending transactions 4,647 2,343 1,216 — 8,206 Obligations to return securities received as collateral 2,855 202 120 — 3,177 Total ¥ 9,792 ¥ 16,873 ¥ 3,340 ¥ 2,547 ¥ 32,552 March 31, 2019 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 3,892 ¥ 18,586 ¥ 2,824 ¥ 2,823 ¥ 28,125 Payables under securities lending transactions 913 — — — 913 Obligations to return securities received as collateral 2,572 396 117 2 3,087 Total ¥ 7,377 ¥ 18,982 ¥ 2,941 ¥ 2,825 ¥ 32,125
Secured Borrowing by the Class of Collateral Pledged [Table Text Block]	March 31, 2018 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 2,462 ¥ 7,085 ¥ 1,242 ¥ 10,789 Foreign government and official institution bonds 14,316 36 1,344 15,696 Corporate bonds 570 — 84 654 Residential mortgage-backed securities 3,567 — — 3,567 Other debt securities 121 — — 121 Marketable equity securities 123 1,085 507 1,715 Others 10 — — 10 Total ¥ 21,169 ¥ 8,206 ¥ 3,177 ¥ 32,552 March 31, 2019 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 8,306 ¥ 21 ¥ 856 ¥ 9,183 Foreign government and official institution bonds 14,291 — 1,286 15,577 Corporate bonds 705 — 172 877 Residential mortgage-backed securities 4,369 — — 4,369 Other debt securities 238 — — 238 Marketable equity securities 200 892 772 1,864 Others 16 — 1 17 Total ¥ 28,125 ¥ 913 ¥ 3,087 ¥ 32,125

Common Stock and Capital Surp_2

Common Stock and Capital Surplus [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Common Stock [Member]
Number of Shares Issued and Outstanding [Table Text Block]	2017 2018 2019 (shares) Balance at beginning of fiscal year 14,168,853,820 14,168,853,820 13,900,028,020 Retirement of shares of common stock — (268,825,800 ) (232,257,500 ) Balance at end of fiscal year 14,168,853,820 13,900,028,020 13,667,770,520

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Changes in Accumulated OCI, Net of Tax and Net of Noncontrolling Interests [Table Text Block]	2017 2018 2019 (in millions) Accumulated other comprehensive income (loss), net of taxes: Net unrealized gains (losses) on investment securities (1) Balance at beginning of fiscal year ¥ 1,995,314 ¥ 2,032,807 ¥ 2,270,346 Net change during the fiscal year 31,984 244,249 60,616 Effect of adopting new guidance by a foreign affiliated company — 118 — Effect of adopting new guidance on consolidation of certain variable interest entities (Note 26) 5,509 — — Effect of adopting new guidance on reclassification on certain tax effects — (6,828 ) — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities (Note 1) — — (2,700,331 ) Balance at end of fiscal year ¥ 2,032,807 ¥ 2,270,346 ¥ (369,369 ) Net debt valuation adjustments: Balance at beginning of fiscal year ¥ (2,080 ) ¥ (10,632 ) ¥ (16,488 ) Net change during the fiscal year (8,552 ) (2,178 ) 9,729 Effect of adopting new guidance on reclassification on certain tax effects — (3,678 ) — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities (Note 1) — — (1,911 ) Balance at end of fiscal year ¥ (10,632 ) ¥ (16,488 ) ¥ (8,670 ) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Balance at beginning of fiscal year ¥ 4,516 ¥ (8,729 ) ¥ (19,250 ) Net change during the fiscal year (13,245 ) (7,025 ) (4,890 ) Effect of adopting new guidance on reclassification on certain tax effects — (3,496 ) — Balance at end of fiscal year ¥ (8,729 ) ¥ (19,250 ) ¥ (24,140 ) Defined benefit plans: Balance at beginning of fiscal year ¥ (317,422 ) ¥ (214,062 ) ¥ (119,593 ) Net change during the fiscal year 103,360 109,012 (88,680 ) Effect of adopting new guidance on reclassification on certain tax effects — (14,543 ) — Balance at end of fiscal year ¥ (214,062 ) ¥ (119,593 ) ¥ (208,273 ) Foreign currency translation adjustments: Balance at beginning of fiscal year ¥ 620,931 ¥ 482,039 ¥ 362,300 Net change during the fiscal year (137,256 ) (119,213 ) (36,117 ) Effect of adopting new guidance on consolidation of certain variable interest entities (Note 26) (1,636 ) — — Effect of adopting new guidance on reclassification on certain tax effects — (526 ) — Balance at end of fiscal year ¥ 482,039 ¥ 362,300 ¥ 326,183 Balance at end of fiscal year ¥ 2,281,423 ¥ 2,477,315 ¥ (284,269 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019.
Before Tax and Net of Tax Changes in Each Component of Accumulated OCI [Table Text Block]	2017 2018 2019 Before tax Tax Net of tax Before tax Tax Net of tax Before tax Tax Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities (1) ¥ 307,476 ¥ (107,082 ) ¥ 200,394 ¥ 631,154 ¥ (204,916 ) ¥ 426,238 ¥ 132,723 ¥ (24,690) ¥ 108,033 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (274,278 ) 86,845 (187,433 ) (280,258 ) 84,328 (195,930 ) (28,953 ) 9,100 (19,853 ) Net change 33,198 (20,237 ) 12,961 350,896 (120,588 ) 230,308 103,770 (15,590 ) 88,180 Net unrealized gains (losses) on investment securities attributable to noncontrolling interests (19,023 ) (13,941 ) 27,564 Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group 31,984 244,249 60,616 Net debt valuation adjustments: Net debt valuation adjustments (12,693 ) 3,994 (8,699 ) (3,555 ) 1,088 (2,467 ) 13,006 (3,982 ) 9,024 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 215 (68 ) 147 417 (128 ) 289 1,016 (311 ) 705 Net change (12,478 ) 3,926 (8,552 ) (3,138 ) 960 (2,178 ) 14,022 (4,293 ) 9,729 Net debt valuation adjustments attributable to noncontrolling interests — — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group (8,552 ) (2,178 ) 9,729 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized losses on derivatives qualifying for cash flow hedges (4,321 ) 2,041 (2,280 ) (3,430 ) 1,571 (1,859 ) (10,397 ) 2,825 (7,572 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests (18,367 ) 7,402 (10,965 ) (8,016 ) 2,850 (5,166 ) 3,662 (980 ) 2,682 Net change (22,688 ) 9,443 (13,245 ) (11,446 ) 4,421 (7,025 ) (6,735 ) 1,845 (4,890 ) Net unrealized gains on derivatives qualifying for cash flow hedges attributable to noncontrolling interests — — — Net unrealized losses on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group (13,245 ) (7,025 ) (4,890 ) Defined benefit plans: Defined benefit plans 131,971 (41,852 ) 90,119 154,708 (48,537 ) 106,171 (126,001 ) 37,655 (88,346 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 20,105 (6,652 ) 13,453 5,904 (2,237 ) 3,667 (1,168 ) 574 (594 ) Net change 152,076 (48,504 ) 103,572 160,612 (50,774 ) 109,838 (127,169 ) 38,229 (88,940 ) Defined benefit plans attributable to noncontrolling interests 212 826 (260 ) Defined benefit plans attributable to Mitsubishi UFJ Financial Group 103,360 109,012 (88,680 ) Foreign currency translation adjustments: Foreign currency translation adjustments (148,460 ) 2,424 (146,036 ) (137,811 ) 32,767 (105,044 ) (18,062 ) (17,932 ) (35,994 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 3,293 (467 ) 2,826 (1,494 ) 1,760 266 (9,002 ) 2,784 (6,218 ) Net change (145,167 ) 1,957 (143,210 ) (139,305 ) 34,527 (104,778 ) (27,064 ) (15,148 ) (42,212 ) Foreign currency translation adjustments attributable to noncontrolling interests (5,954 ) 14,435 (6,095 ) Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (137,256 ) (119,213 ) (36,117 ) Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group ¥ (23,709 ) ¥ 224,845 ¥ (59,342 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019.
Reclassification of Significant Items out of Accumulated OCI [Table Text Block]	2017 2018 2019 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale (1) ¥ (307,041 ) ¥ (287,279 ) ¥ (29,182 ) Investment securities gains Impairment losses on investment securities 32,744 6,759 596 Investment securities gains Other 19 262 (367 ) (274,278 ) (280,258 ) (28,953 ) Total before tax 86,845 84,328 9,100 Income tax expense ¥ (187,433 ) ¥ (195,930 ) ¥ (19,853 ) Net of tax Net debt valuation adjustments ¥ 215 ¥ 417 ¥ 1,016 Equity in earnings of equity 215 417 1,016 Total before tax (68 ) (128 ) (311 ) Income tax expense ¥ 147 ¥ 289 ¥ 705 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ (18,332 ) ¥ (7,782 ) ¥ 3,739 Interest income on Loans, Other (35 ) (234 ) (77 ) (18,367 ) (8,016 ) 3,662 Total before tax 7,402 2,850 (980 ) Income tax expense ¥ (10,965 ) ¥ (5,166 ) ¥ 2,682 Net of tax Defined benefit plans Net actuarial loss (2) ¥ 31,837 ¥ 17,280 ¥ 11,431 Other non-interest Prior service cost (2) (9,927 ) (6,959 ) (6,269 ) Other non-interest Gain on settlements and curtailment, and other (2) (1,805 ) (4,417 ) (6,330 ) Other non-interest 20,105 5,904 (1,168 ) Total before tax (6,652 ) (2,237 ) 574 Income tax expense ¥ 13,453 ¥ 3,667 ¥ (594 ) Net of tax 2017 2018 2019 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Foreign currency translation adjustments ¥ (39 ) ¥ (5,743 ) ¥ (9,004 ) Other non-interest income 3,332 4,249 2 Other non-interest expenses 3,293 (1,494 ) (9,002 ) Total before tax (467 ) 1,760 2,784 Income tax expense ¥ 2,826 ¥ 266 ¥ (6,218 ) Net of tax Total reclassifications for the period ¥ (269,032 ) ¥ (283,447 ) ¥ (34,445 ) Total before tax 87,060 86,573 11,167 Income tax expense ¥ (181,972 ) ¥ (196,874 ) ¥ (23,278 ) Net of tax Notes: (1) Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019 while included unrealized gains (losses) related to both debt and equity securities for the fiscal years ended March 31, 2017 and 2018. (2) These Accumulated OCI components are components of net periodic benefit cost. See Note 13 for more information.

Noncontrolling Interests _Tex_2

Noncontrolling Interests [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Noncontrolling Interest [Abstract]
Effect on MUFG's Shareholders' Equity from Changes in Ownership of Subsidiaries [Table Text Block]	2017 2018 2019 (in millions) Net income attributable to Mitsubishi UFJ Financial Group ¥ 202,680 ¥ 1,228,160 ¥ 718,645 Transactions between Mitsubishi UFJ Financial Group and the noncontrolling interest shareholders: Purchase of shares of Mitsubishi UFJ NICOS from noncontrolling interest shareholder (Note 2) — (34,751 ) — Other (429 ) 8,006 (78 ) Net transfers to the noncontrolling interest shareholders (429 ) (26,745 ) (78 ) Change from net income attributable to Mitsubishi UFJ Financial Group and transactions between Mitsubishi UFJ Financial Group and the noncontrolling interest shareholders ¥ 202,251 ¥ 1,201,415 ¥ 718,567

Regulatory Capital Requiremen_2

Regulatory Capital Requirements [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Domestic, Japan [Member]
Risk-adjusted Capital Amounts and Ratios [Table Text Block]	Actual For capital Amount Ratio Amount Ratio (in millions, except percentages) Consolidated: At March 31, 2018: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,795,480 16.56 % ¥ 12,492,344 11.01 % BK 14,470,240 15.90 7,280,570 8.00 TB 2,545,648 20.03 1,016,420 8.00 Tier1 capital (to risk-weighted assets): MUFG (1) 16,251,749 14.32 10,223,072 9.01 BK 12,374,074 13.59 5,460,427 6.00 TB 2,245,853 17.67 762,315 6.00 Common Equity Tier1 capital (to risk-weighted assets): MUFG (1) 14,284,945 12.58 8,521,118 7.51 BK 10,788,381 11.85 4,095,321 4.50 TB 2,060,107 16.21 571,736 4.50 At March 31, 2019: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,769,793 16.03 % ¥ 14,097,771 12.04 % BK 14,632,620 14.42 8,114,105 8.00 TB 2,213,195 24.40 725,540 8.00 Tier1 capital (to risk-weighted assets): MUFG (1) 16,276,301 13.90 11,755,949 10.04 BK 12,639,454 12.46 6,085,579 6.00 TB 1,928,955 21.26 544,155 6.00 Common Equity Tier1 capital (to risk-weighted assets): MUFG (1) 14,322,407 12.23 9,999,582 8.54 BK 10,990,820 10.83 4,564,184 4.50 TB 1,775,565 19.57 408,116 4.50 Leverage ratio (2) MUFG 16,276,301 4.94 9,871,460 3.00 BK 12,639,454 4.63 8,189,494 3.00 TB 1,928,955 5.09 1,135,795 3.00 Stand-alone: At March 31, 2018: Total capital (to risk-weighted assets): BK ¥ 13,211,327 16.90 % ¥ 6,252,458 8.00 % TB 2,529,316 19.88 1,017,331 8.00 Tier1 capital (to risk-weighted assets): BK 11,344,078 14.51 4,689,344 6.00 TB 2,232,760 17.55 762,998 6.00 Common Equity Tier1 capital (to risk-weighted assets): BK 9,802,445 12.54 3,517,008 4.50 TB 2,057,760 16.18 572,249 4.50 At March 31, 2019: Total capital (to risk-weighted assets): BK ¥ 13,560,583 15.58 % ¥ 6,959,207 8.00 % TB 2,195,098 24.25 723,953 8.00 Tier1 capital (to risk-weighted assets): BK 11,773,839 13.53 5,219,405 6.00 TB 1,911,237 21.12 542,965 6.00 Common Equity Tier1 capital (to risk-weighted assets): BK 10,172,206 11.69 3,914,554 4.50 TB 1,758,237 19.42 407,224 4.50 Leverage ratio (2) BK 11,773,839 4.84 7,284,812 3.00 TB 1,911,237 5.55 1,031,484 3.00 Notes: (1) Effective March 31, 2016, the FSA’s capital conservation buffer, countercyclical buffer and G-SIB G-SIB G-SIB (2) Effective as of March 31, 2019, the minimum leverage ratio requirement was adopted by the FSA.
Foreign, United States of America [Member] | BK (US) [Member]
Risk-adjusted Capital Amounts and Ratios [Table Text Block]	Actual Minimum capital (1) Ratios OCC Amount Ratio Amount Ratio Amount Ratio (in millions, except percentages) BK(US): At December 31, 2017: Total capital (to risk-weighted assets) $ 15,335 17.68 % $ 8,023 9.250 % $ 8,673 10.00 % Tier 1 capital (to risk-weighted assets) 14,028 16.17 6,288 7.250 6,938 8.00 Tier 1 capital (to quarterly average assets) (2) 14,028 11.78 4,762 4.000 5,953 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 14,028 16.17 4,987 5.750 5,637 6.50 At December 31, 2018: Total capital (to risk-weighted assets) $ 13,905 15.09 % $ 9,102 9.875 % $ 9,217 10.00 % Tier 1 capital (to risk-weighted assets) 13,316 14.45 7,258 7.875 7,374 8.00 Tier 1 capital (to quarterly average assets) (2) 13,316 10.61 5,018 4.000 6,273 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 13,316 14.45 5,876 6.375 5,991 6.50 Notes: (1) Beginning January 1, 2017 and 2018, the minimum capital requirement includes a capital conservation buffer of 1.250% and 1.875%, respectively. (2) Excludes certain deductions.
Foreign, United States of America [Member] | MUAH [Member]
Risk-adjusted Capital Amounts and Ratios [Table Text Block]	Actual Minimum capital (1) Amount Ratio Amount Ratio (in millions, except percentages) MUAH: At December 31, 2017: Total capital (to risk-weighted assets) $ 17,106 17.76 % $ 8,910 9.250 % Tier 1 capital (to risk-weighted assets) 15,708 16.31 6,984 7.250 Tier 1 capital (to quarterly average assets) (2) 15,708 10.06 6,245 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 15,708 16.31 5,539 5.750 At December 31, 2018: Total capital (to risk-weighted assets) $ 14,904 14.60 % $ 10,081 9.875 % Tier 1 capital (to risk-weighted assets) 14,256 13.96 8,039 7.875 Tier 1 capital (to quarterly average assets) (2) 14,256 8.77 6,502 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 14,256 13.96 6,508 6.375 Notes: (1) The minimum capital requirement includes a capital conservation buffer of 1.250% at December 31, 2017 and 1.875% at December 31, 2018. (2) Excludes certain deductions.

Earnings Per Common Share App_2

Earnings Per Common Share Applicable to Common Shareholders of MUFG [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Reconciliations of Net Income (Loss) and Weighted Average Number of Common Shares Outstanding Used for Computation of Basic EPS to Adjusted Amounts for Computation of Diluted EPS [Table Text Block]	2017 2018 2019 (in millions) Income (Numerator): Net income attributable to Mitsubishi UFJ Financial Group ¥ 202,680 ¥ 1,228,160 ¥ 718,645 Effect of dilutive instruments: Stock acquisition rights and restricted stock units—Morgan Stanley (3,212 ) (3,826 ) (3,745 ) Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions ¥ 199,468 ¥ 1,224,334 ¥ 714,900 2017 2018 2019 (thousands of shares) Shares (Denominator): Weighted average common shares outstanding 13,574,314 13,291,842 13,058,698 Effect of dilutive instruments: Stock acquisition rights and the common shares of MUFG under the Board Incentive Plan (1) 10,571 1,650 484 Weighted average common shares for diluted computation 13,584,885 13,293,492 13,059,182 2017 2018 2019 (in yen) Earnings per common share applicable to common shareholders of Mitsubishi UFJ Financial Group: Basic earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group ¥ 14.93 ¥ 92.40 ¥ 55.03 Diluted earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group (1) ¥ 14.68 ¥ 92.10 ¥ 54.74 Note: (1) For the fiscal year ended March 31, 2019, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Derivative Financial Instrume_2

Derivative Financial Instruments [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts of Derivative Contracts [Table Text Block]	Notional amounts (1) 2018 2019 (in trillions) Interest rate contracts ¥ 1,219.7 ¥ 1,409.6 Foreign exchange contracts 220.8 230.5 Equity contracts 6.1 6.4 Commodity contracts 0.3 0.2 Credit derivatives 6.5 7.2 Others 3.1 3.0 Total ¥ 1,456.5 ¥ 1,656.9 Note: (1) Includes both written and purchased positions.
Fair Value Information on Derivative Instruments Recorded on Consolidated Balance Sheet [Table Text Block]	Fair value of derivative instruments 2018 (1)(5) 2019 (1)(5) Not designated (2) Designated (3) Total (4) Not designated (2) Designated (3) Total (4) (in billions) Derivative assets: Interest rate contracts ¥ 8,712 ¥ — ¥ 8,712 ¥ 10,108 ¥ 1 ¥ 10,109 Foreign exchange contracts 3,557 — 3,557 2,795 — 2,795 Equity contracts 207 — 207 188 — 188 Commodity contracts 35 — 35 27 — 27 Credit derivatives 72 — 72 84 — 84 Others 2 — 2 2 — 2 Total derivative assets ¥ 12,585 ¥ — ¥ 12,585 ¥ 13,204 ¥ 1 ¥ 13,205 Derivative liabilities: Interest rate contracts ¥ 8,674 ¥ 17 ¥ 8,691 ¥ 9,896 ¥ — ¥ 9,896 Foreign exchange contracts 3,000 — 3,000 2,671 — 2,671 Equity contracts 227 — 227 183 — 183 Commodity contracts 33 — 33 27 — 27 Credit derivatives 71 — 71 69 — 69 Others (6) (145 ) — (145 ) (136 ) — (136 ) Total derivative liabilities ¥ 11,860 ¥ 17 ¥ 11,877 ¥ 12,710 ¥ — ¥ 12,710 Notes: (1) The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts. (2) The derivative instruments which are not designated as a hedging instrument are held for trading and risk management purposes, and are presented in Trading account assets/liabilities except for (6). (3) The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by MUFG Americas Holdings. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying consolidated balance sheets. (4) This table does not include contracts with embedded derivatives for which the fair value option has been elected. (5) For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 32. (6) Others include mainly bifurcated embedded derivatives carried at fair value, which are presented in Deposits and Long-term debt.
Gains and Losses for Trading and Risk Management Derivatives (Not Designated as Hedging Instruments) [Table Text Block]	Trading and risk management derivatives gains and losses 2017 2018 2019 Foreign Trading Total Foreign Trading Total Foreign Trading Total (in billions) Interest rate contracts ¥ — ¥ (137 ) ¥ (137 ) ¥ — ¥ 51 ¥ 51 ¥ — ¥ 6 ¥ 6 Foreign exchange contracts (183 ) — (183 ) (163 ) — (163 ) (347 ) — (347 ) Equity contracts — (153 ) (153 ) — (260 ) (260 ) — 80 80 Commodity contracts — 2 2 — 6 6 — — — Credit derivatives — 18 18 — (2 ) (2 ) — (40 ) (40 ) Others — (55 ) (55 ) 3 (22 ) (19 ) (7 ) (70 ) (77 ) Total ¥ (183 ) ¥ (325 ) ¥ (508 ) ¥ (160 ) ¥ (227 ) ¥ (387 ) ¥ (354) ¥ (24 ) ¥ (378 )
Gains and Losses for Derivatives Designated as Cash Flow Hedges [Table Text Block]	2017 2018 2019 (in billions) Losses recognized in Accumulated OCI on derivative instruments (Effective portion) Interest rate contracts ¥ (3 ) ¥ (4 ) ¥ (11 ) Total ¥ (3 ) ¥ (4 ) ¥ (11 ) Gains (losses) reclassified from Accumulated OCI into income (Effective portion) Interest rate contracts (1) ¥ 18 ¥ 8 ¥ (4 ) Total ¥ 18 ¥ 8 ¥ (4 ) Note: (1) Included in Interest income.
Protection Sold Through Credit Default Swaps [Table Text Block]	Protection sold Maximum potential/Notional amount Fair value At March 31, 2018: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 440,610 ¥ 1,199,269 ¥ 85,094 ¥ 1,724,973 ¥ (33,389 ) Non-investment 168,102 259,497 4,775 432,374 (3,431 ) Not rated — 45,425 — 45,425 8 Total 608,712 1,504,191 89,869 2,202,772 (36,812 ) Index and basket credit default swaps held by BK: Investment grade (2) 3,000 118,359 37,781 159,140 (3,381 ) Non-investment 7,000 82,867 — 89,867 (1,311 ) Total 10,000 201,226 37,781 249,007 (4,692 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 15,000 108,000 6,000 129,000 (2,641 ) Non-investment 12,000 29,000 — 41,000 (749 ) Not rated 42,439 260,951 1,863 305,253 (16,294 ) Total 69,439 397,951 7,863 475,253 (19,684 ) Total index and basket credit default swaps sold 79,439 599,177 45,644 724,260 (24,376 ) Total credit default swaps sold 688,151 2,103,368 135,513 2,927,032 (61,188 ) Other credit derivatives sold (3) Investment grade — 74,368 — 74,368 (24 ) Total credit derivatives ¥ 688,151 ¥ 2,177,736 ¥ 135,513 ¥ 3,001,400 ¥ (61,212 ) Protection sold Maximum potential/Notional amount Fair value At March 31, 2019: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 378,527 ¥ 1,603,962 ¥ 145,689 ¥ 2,128,178 ¥ (30,303 ) Non-investment 112,901 238,330 5,672 356,903 (127 ) Not rated — 5,097 — 5,097 (47 ) Total 491,428 1,847,389 151,361 2,490,178 (30,477 ) Index and basket credit default swaps held by BK: Investment grade (2) — 120,854 — 120,854 (82 ) Non-investment — 101,001 — 101,001 (2,010 ) Total — 221,855 — 221,855 (2,092 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 13,000 194,618 8,000 215,618 (3,853 ) Non-investment — — — — — Not rated 8,863 206,832 3,444 219,139 (3,043 ) Total 21,863 401,450 11,444 434,757 (6,896 ) Total index and basket credit default swaps sold 21,863 623,305 11,444 656,612 (8,988 ) Total credit default swaps sold 513,291 2,470,694 162,805 3,146,790 (39,465 ) Other credit derivatives sold (3) Investment grade 77,693 — — 77,693 (620 ) Total credit derivatives ¥ 590,984 ¥ 2,470,694 ¥ 162,805 ¥ 3,224,483 ¥ (40,085 ) Notes: (1) Fair value amounts are shown on a gross basis prior to cash collateral or counterparty netting. (2) The MUFG Group considers ratings of Baa3/BBB- (3) Other credit derivatives primarily consist of total return swaps.

Obligations under Guarantees _2

Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Contractual or Notional Amounts of Guarantees with Amount by Expiration Period [Table Text Block]	Maximum Amount by expiration period At March 31, 2018: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 4,311 ¥ 3,115 ¥ 850 ¥ 346 Performance guarantees 3,051 2,144 801 106 Derivative instruments (1) 40,513 15,230 18,314 6,969 Liabilities of trust accounts 9,444 6,017 558 2,869 Others 22 2 4 16 Total ¥ 57,341 ¥ 26,508 ¥ 20,527 ¥ 10,306 Maximum Amount by expiration period At March 31, 2019: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 2,792 ¥ 838 ¥ 271 Performance guarantees 3,256 2,332 784 140 Derivative instruments (1) 58,025 29,734 20,921 7,370 Liabilities of trust accounts 11,520 5,884 420 5,216 Others 53 12 13 28 Total ¥ 76,755 ¥ 40,754 ¥ 22,976 ¥ 13,025 Note: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation.
Maximum Potential Amount of Future Payments Classified Based upon Internal Credit Ratings [Table Text Block]	Amount by borrower grade At March 31, 2018: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 4,311 ¥ 4,211 ¥ 83 ¥ 13 ¥ 4 Performance guarantees 3,051 2,910 113 5 23 Total ¥ 7,362 ¥ 7,121 ¥ 196 ¥ 18 ¥ 27 Amount by borrower grade At March 31, 2019: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 3,779 ¥ 98 ¥ 21 ¥ 3 Performance guarantees 3,256 3,070 79 78 29 Total ¥ 7,157 ¥ 6,849 ¥ 177 ¥ 99 ¥ 32 Notes: (1) Borrowers classified as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower’s loans are TDRs or loans contractually past due 90 days or more for special reasons. (2) Borrowers classified as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment,
Contractual Amounts with Regard to Other Off-balance Sheet Instruments [Table Text Block]	2018 2019 (in billions) Commitments to extend credit ¥ 80,090 ¥ 77,273 Commercial letters of credit 1,191 1,057 Commitments to make investments 183 240 Other 13 5

Variable Interest Entities _T_2

Variable Interest Entities [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Consolidated VIEs [Member]
Assets and Liabilities of Variable Interest Entities [Table Text Block]	Consolidated VIEs Consolidated assets At March 31, 2018: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 7,390,029 ¥ 52,703 ¥ 44,902 ¥ 2,273 ¥ 1,777,017 ¥ 5,502,892 ¥ 10,242 Investment funds 598,662 — 10,300 461,036 19,895 — 107,431 Special purpose entities created for structured financing 198,484 — 2,332 — — 149,194 46,958 Repackaged instruments 152,781 520 — 17,376 92,210 42,632 43 Securitization of the MUFG Group’s assets 10,852,539 — — — — 10,827,488 25,051 Trust arrangements 7,177,407 — 10,541 702 152,277 7,011,255 2,632 Others 44,247 361 14,236 — 42 12,963 16,645 Total consolidated assets before elimination 26,414,149 53,584 82,311 481,387 2,041,441 23,546,424 209,002 The amounts eliminated in (7,223,156 ) (53,454 ) (59,150 ) (3,804 ) (88,758 ) (6,996,317 ) (21,673 ) Total consolidated assets ¥ 19,190,993 ¥ 130 ¥ 23,161 ¥ 477,583 ¥ 1,952,683 ¥ 16,550,107 ¥ 187,329 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 7,409,190 ¥ — ¥ 5,176,663 ¥ 1,708,354 ¥ 524,173 Investment funds 11,735 — — — 11,735 Special purpose entities created for structured financing 115,353 — 587 112,054 2,712 Repackaged instruments 148,928 — 12,676 132,012 4,240 Securitization of the MUFG Group’s assets 10,816,672 — 5,000 10,806,145 5,527 Trust arrangements 7,171,852 7,103,738 655 — 67,459 Others 43,030 — 24,747 1,603 16,680 Total consolidated liabilities before elimination 25,716,760 7,103,738 5,220,328 12,760,168 632,526 The amounts eliminated in consolidation (15,347,991 ) — (3,028,987 ) (12,248,680 ) (70,324 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,745,330 ) (7,103,738 ) (2,162,890 ) (540 ) (478,162 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 623,439 ¥ — ¥ 28,451 ¥ 510,948 ¥ 84,040 Consolidated VIEs Consolidated assets At March 31, 2019: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,698,146 ¥ 92,310 ¥ 26,101 ¥ 3,005 ¥ 1,424,444 ¥ 5,124,462 ¥ 27,824 Investment funds 680,922 — 14,113 477,239 18,118 — 171,452 Special purpose entities created for structured financing 203,458 — 2,214 — — 127,243 74,001 Repackaged instruments 279,327 506 — 53,346 137,509 86,753 1,213 Securitization of the MUFG Group’s assets 10,208,496 — — — — 10,183,624 24,872 Trust arrangements 7,888,210 — 8,953 202 311,412 7,565,862 1,781 Others 34,303 362 1,635 — 42 9,699 22,565 Total consolidated assets before elimination 25,992,862 93,178 53,016 533,792 1,891,525 23,097,643 323,708 The amounts eliminated in consolidation (7,772,776 ) (93,171 ) (29,361 ) (5,102 ) (63,331 ) (7,552,315 ) (29,496 ) Total consolidated assets ¥ 18,220,086 ¥ 7 ¥ 23,655 ¥ 528,690 ¥ 1,828,194 ¥ 15,545,328 ¥ 294,212 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 6,691,362 ¥ — ¥ 4,678,588 ¥ 1,552,572 ¥ 460,202 Investment funds 6,852 — — 5,158 1,694 Special purpose entities created for structured financing 114,469 — 609 111,523 2,337 Repackaged instruments 277,179 — 48,014 174,215 54,950 Securitization of the MUFG Group’s assets 10,167,632 — — 10,162,231 5,401 Trust arrangements 7,881,332 7,616,575 — — 264,757 Others 32,584 — 8,611 1,474 22,499 Total consolidated liabilities before elimination 25,171,410 7,616,575 4,735,822 12,007,173 811,840 The amounts eliminated in consolidation (14,676,389 ) (50,396 ) (2,996,041 ) (11,517,019 ) (112,933 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,922,307 ) (7,566,179 ) (1,719,246 ) (121 ) (636,761 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 572,714 ¥ — ¥ 20,535 ¥ 490,033 ¥ 62,146
Non-consolidated VIEs [Member]
Assets and Liabilities of Variable Interest Entities [Table Text Block]	Non-consolidated VIEs On-balance On-balance sheet At March 31, 2018: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥ 29,011,749 ¥ 5,721,627 ¥ 4,645,697 ¥ 620 ¥ 1,541,591 ¥ 3,103,486 ¥ — ¥ — ¥ — Investment funds 45,090,381 1,776,366 1,525,127 213,722 891,062 413,855 6,488 17,919 17,919 Special purpose entities created for structured financing 35,437,349 4,016,999 3,193,621 309,560 116,961 2,697,126 69,974 7,217 7,217 Repackaged instruments 10,212,933 2,576,619 2,487,377 759,591 1,421,716 236,852 69,218 — — Others 49,582,444 3,760,375 2,740,529 94,882 61,192 2,482,141 102,314 24,830 24,830 Total ¥ 169,334,856 ¥ 17,851,986 ¥ 14,592,351 ¥ 1,378,375 ¥ 4,032,522 ¥ 8,933,460 ¥ 247,994 ¥ 49,966 ¥ 49,966 Non-consolidated VIEs On-balance On-balance sheet At March 31, 2019: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥29,621,609 ¥ 6,221,274 ¥ 4,982,357 ¥ 659 ¥ 1,704,553 ¥ 3,277,145 ¥ — ¥ — ¥ — Investment funds 67,750,419 1,952,676 1,753,823 187,166 1,253,705 304,310 8,642 206 206 Special purpose entities created for structured financing 42,676,571 3,972,450 3,015,593 252,597 48,895 2,709,008 5,093 9,827 9,827 Repackaged instruments 12,885,367 3,477,545 3,383,161 690,305 2,169,798 478,252 44,806 6,087 6,087 Others 60,074,743 3,482,153 2,454,807 123,595 65,451 2,145,665 120,096 57,567 57,567 Total ¥ 213,008,709 ¥ 19,106,098 ¥ 15,589,741 ¥ 1,254,322 ¥ 5,242,402 ¥ 8,914,380 ¥ 178,637 ¥73,687 ¥73,687

Commitments and Contingent Li_2

Commitments and Contingent Liabilities [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Rental Commitments for Noncancelable Leases [Table Text Block]	Capital Operating (in millions) Fiscal year ending March 31: 2020 ¥ 6,573 ¥ 94,422 2021 5,957 81,431 2022 4,739 68,416 2023 3,287 56,471 2024 1,672 50,571 2025 and thereafter 3,104 271,031 Total minimum lease payments ¥ 25,332 ¥ 622,342 Amount representing interest (2,797 ) Present value of minimum lease payments ¥ 22,535

Fees and Commissions Income __2

Fees and Commissions Income [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Details of Fees and Commissions Income [Table Text Block]	2017 2018 2019 (in millions) Fees and commissions on deposits ¥ 53,891 ¥ 53,483 ¥ 52,624 Fees and commissions on remittances and transfers 168,571 169,300 168,756 Fees and commissions on foreign trading business 75,024 78,239 73,176 Fees and commissions on credit card business 198,145 212,515 225,877 Fees and commissions on security-related services 239,516 258,728 233,448 Fees and commissions on administration and management services for investment funds 155,708 159,481 147,597 Trust fees 103,110 112,399 115,002 Guarantee fees (1) 41,818 44,160 44,962 Insurance commissions 59,853 49,223 46,918 Fees and commissions on real estate business 39,808 40,573 45,160 Other fees and commissions (2) 279,449 284,691 285,058 Total ¥ 1,414,893 ¥ 1,462,792 ¥ 1,438,578 Notes: (1) Guarantee fees are not within the scope of the guidance on revenue from contracts with customers. (2) Other fees and commissions include non-refundable

Trading Account Profits and L_2

Trading Account Profits and Losses [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Net Trading Gains (Losses) [Table Text Block]	2017 2018 2019 (in millions) Interest rate and other derivative contracts ¥ (325,007 ) ¥ (226,788 ) ¥ (24,031 ) Trading account securities, excluding derivatives (314,177 ) 153,674 192,931 Trading account profits (losses)—net (639,184 ) (73,114 ) 168,900 Foreign exchange derivative contracts (1) (183,159 ) (159,986 ) (354,401 ) Net trading losses ¥ (822,343 ) ¥ (233,100 ) ¥ (185,501 ) Note: (1) Losses on foreign exchange derivative contracts are included in Foreign exchange losses—net in the accompanying consolidated statements of income. Foreign exchange losses—net in the accompanying consolidated statements of income are also comprised of foreign exchange gains other than derivative contracts and foreign exchange losses related to the fair value option.

Business Segments _Text Block_

Business Segments [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Financial Information by Business Segment [Table Text Block]	Customer Business Global Other Total (1) Retail & Commercial Japanese Global Global Asset Total (in billions) Fiscal year ended March 31, 2017: Net revenue: ¥ 1,568.0 ¥ 527.1 ¥ 418.3 ¥ 628.6 ¥ 176.7 ¥ 3,318.7 ¥ 686.8 ¥ 56.3 ¥ 4,061.8 BK and TB (2) 817.0 446.9 275.6 (1.8 ) 72.7 1,610.4 491.5 88.6 2,190.5 Net interest income 482.0 143.8 107.3 (1.7 ) — 731.4 291.0 199.4 1,221.8 Net fees 300.6 245.0 177.3 — 72.7 795.6 (8.2 ) (98.8 ) 688.6 Other 34.4 58.1 (9.0 ) (0.1 ) — 83.4 208.7 (12.0 ) 280.1 Other than BK and TB 751.0 80.2 142.7 630.4 104.0 1,708.3 195.3 (32.3 ) 1,871.3 Operating expenses 1,234.1 290.0 236.0 435.8 114.7 2,310.6 217.4 162.3 2,690.3 Operating profit (loss) ¥ 333.9 ¥ 237.1 ¥ 182.3 ¥ 192.8 ¥ 62.0 ¥ 1,008.1 ¥ 469.4 ¥ (106.0 ) ¥ 1,371.5 Fiscal year ended March 31, 2018: Net revenue: ¥ 1,584.3 ¥ 522.6 ¥ 378.6 ¥ 666.3 ¥ 190.4 ¥ 3,342.2 ¥ 565.2 ¥ 10.7 ¥ 3,918.1 BK and TB (2) 785.9 439.8 246.3 (3.5 ) 83.8 1,552.3 368.6 109.0 2,029.9 Net interest income 465.8 150.7 95.2 (3.4 ) — 708.3 182.0 229.4 1,119.7 Net fees 288.4 233.2 153.1 — 83.8 758.5 (12.2 ) (79.1 ) 667.2 Other 31.7 55.9 (2.0 ) (0.1 ) — 85.5 198.8 (41.3 ) 243.0 Other than BK and TB 798.4 82.8 132.3 669.8 106.6 1,789.9 196.6 (98.3 ) 1,888.2 Operating expenses 1,227.6 295.6 242.8 463.6 119.4 2,349.0 225.7 142.8 2,717.5 Operating profit (loss) ¥ 356.7 ¥ 227.0 ¥ 135.8 ¥ 202.7 ¥ 71.0 ¥ 993.2 ¥ 339.5 ¥ (132.1 ) ¥ 1,200.6 Fiscal year ended March 31, 2019: Net revenue: ¥ 1,521.6 ¥ 541.5 ¥ 399.7 ¥ 706.9 ¥ 203.0 ¥ 3,372.7 ¥ 472.5 ¥ (32.8 ) ¥ 3,812.4 BK and TB (2) 738.6 421.6 266.6 (1.4 ) 93.2 1,518.6 303.9 38.5 1,861.0 Net interest income 460.4 152.1 113.6 (1.4 ) — 724.7 183.1 237.4 1,145.2 Net fees 243.9 213.1 152.4 — 93.2 702.6 (14.2 ) (67.5 ) 620.9 Other 34.3 56.4 0.6 — — 91.3 135.0 (131.4 ) 94.9 Other than BK and TB 783.0 119.9 133.1 708.3 109.8 1,854.1 168.6 (71.3 ) 1,951.4 Operating expenses 1,222.8 291.8 247.0 486.5 124.6 2,372.7 221.3 146.1 2,740.1 Operating profit (loss) ¥ 298.8 ¥ 249.7 ¥ 152.7 ¥ 220.4 ¥ 78.4 ¥ 1,000.0 ¥ 251.2 ¥ (178.9 ) ¥ 1,072.3 Notes: (1) Prior period business segment information has been restated to reflect the transfer of corporate loan-related businesses of Mitsubishi UFJ Trust and Banking to MUFG Bank. In accordance with internal management accounting rules and practices, the transfer resulted in a decrease of the total operating profit by ¥24.3 billion and ¥23.5 billion for fiscal years ended March 31, 2017 and 2018, respectively. (2) “BK and TB” is a sum of MUFG Bank on a stand-alone basis and Mitsubishi UFJ Trust and Banking on a stand-alone basis.
Reconciliation of Operating Profit (Loss) from Segments to Consolidated Statements of Income [Table Text Block]	2017 2018 2019 (in billions) Operating profit: ¥ 1,372 ¥ 1,201 ¥ 1,072 Reversal of (provision for) credit losses (254 ) 241 (34 ) Trading account profits (losses)—net (880 ) (287 ) 182 Equity investment securities gains (losses)—net 181 215 (305 ) Debt investment securities gains (losses)—net 48 71 (3 ) Foreign exchange gains (losses)—net (110 ) 7 47 Equity in earnings of equity method investees—net 198 228 210 Impairment of goodwill (7 ) — — Impairment of intangible assets (6 ) (22 ) (118 ) Reversal of (provision for) off-balance (107 ) 96 (38 ) Other—net (162 ) (88 ) (142 ) Income before income tax expense ¥ 273 ¥ 1,662 ¥ 871

Foreign Activities _Text Bloc_2

Foreign Activities [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Text Block [Abstract]
Estimated Financial Information by Geographic Areas [Table Text Block]	Domestic Foreign Total Japan United Europe Asia/Oceania Other (1) (in millions) Fiscal year ended March 31, 2017: Total revenue (2) ¥ 1,903,336 ¥ 749,513 ¥ 330,751 ¥ 818,917 ¥ 384,956 ¥ 4,187,473 Total expense (3) 2,345,731 677,548 138,128 582,665 170,858 3,914,930 Income (loss) before income tax expense (benefit) (442,395 ) 71,965 192,623 236,252 214,098 272,543 Net income (loss) attributable to Mitsubishi UFJ Financial Group (365,734 ) 119,189 216,584 102,803 129,838 202,680 Total assets at end of fiscal year 191,305,636 46,053,230 23,821,920 25,255,955 10,748,278 297,185,019 Fiscal year ended March 31, 2018: Total revenue (2) ¥ 2,127,278 ¥ 1,337,529 ¥ 506,211 ¥ 779,983 ¥ 443,106 ¥ 5,194,107 Total expense (3) 1,687,344 843,885 173,665 651,125 176,269 3,532,288 Income before income tax expense 439,934 493,644 332,546 128,858 266,837 1,661,819 Net income attributable to Mitsubishi UFJ Financial Group 140,091 447,887 322,581 92,016 225,585 1,228,160 Total assets at end of fiscal year 196,121,542 44,831,664 22,342,574 27,163,121 10,111,411 300,570,312 Fiscal year ended March 31, 2019: Total revenue (2) ¥ 1,886,469 ¥ 1,637,569 ¥ 222,267 ¥ 1,157,946 ¥ 504,372 ¥ 5,408,623 Total expense (3) 2,204,147 1,012,978 173,934 892,729 253,993 4,537,781 Income (loss) before income tax expense (benefit) (317,678 ) 624,591 48,333 265,217 250,379 870,842 Net income (loss) attributable to Mitsubishi UFJ Financial Group (345,148 ) 573,698 50,877 214,582 224,636 718,645 Total assets at end of fiscal year 194,070,495 49,987,389 21,535,278 27,992,986 11,642,751 305,228,899 Notes: (1) Other areas primarily include Canada, Latin America, the Caribbean and the Middle East. (2) Total revenue is comprised of Interest income and Non-interest (3) Total expense is comprised of Interest expense, Provision for (reversal of) credit losses and Non-interest
Analysis of Certain Asset and Liability Accounts Related to Foreign Activities [Table Text Block]	2018 2019 (in millions) Cash and due from banks ¥ 1,816,704 ¥ 828,839 Interest-earning deposits in other banks 8,560,283 8,453,191 Total ¥ 10,376,987 ¥ 9,282,030 Trading account assets ¥ 23,904,678 ¥ 26,991,984 Investment securities ¥ 7,692,969 ¥ 8,779,340 Loans—net of unearned income, unamortized premiums and deferred loan fees ¥ 51,339,696 ¥ 51,678,674 Deposits ¥ 45,818,648 ¥ 49,044,234 Funds borrowed: Call money, funds purchased ¥ 355,666 ¥ 67,246 Payables under repurchase agreements 8,181,347 9,459,547 Payables under securities lending transactions 276,563 47,886 Other short-term borrowings 5,152,667 5,107,832 Long-term debt 2,223,246 2,697,463 Total ¥ 16,189,489 ¥ 17,379,974 Trading account liabilities ¥ 4,251,049 ¥ 3,897,844

Fair Value _Text Block_ (Tables

Fair Value [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Assets and Liabilities Measured at Fair Value by Level on Recurring Basis [Table Text Block]	At March 31, 2018 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 10,876,424 ¥ 10,876,080 ¥ 827,493 ¥ 22,579,997 Debt securities Japanese national government and Japanese government agency bonds 1,388,143 477,530 — 1,865,673 Japanese prefectural and municipal bonds — 189,756 — 189,756 Foreign government and official institution bonds 8,190,781 469,342 1,047 8,661,170 Corporate bonds — 3,255,503 23,092 3,278,595 Residential mortgage-backed securities — 4,432,307 41,141 4,473,448 Asset-backed securities — 186,351 684,637 870,988 Other debt securities — 2,800 33,450 36,250 Commercial paper — 1,210,775 — 1,210,775 Equity securities (2) 1,297,500 651,716 44,126 1,993,342 Trading derivative assets 71,175 12,420,100 93,900 12,585,175 Interest rate contracts 3,320 8,681,427 27,092 8,711,839 Foreign exchange contracts 1,890 3,543,413 12,118 3,557,421 Equity contracts 65,965 118,351 22,994 207,310 Commodity contracts — 6,239 30,753 36,992 Credit derivatives — 70,670 943 71,613 Investment securities: Available-for-sale 23,105,682 9,376,772 350,660 32,833,114 Japanese national government and Japanese government agency bonds 21,522,128 3,045,776 — 24,567,904 Japanese prefectural and municipal bonds — 1,537,431 — 1,537,431 Foreign government and official institution bonds 1,583,554 567,946 20,192 2,171,692 Corporate bonds — 1,113,323 6,037 1,119,360 Residential mortgage-backed securities — 1,617,520 15 1,617,535 Commercial mortgage-backed securities — 92,806 2,430 95,236 Asset-backed securities — 1,397,177 161,172 1,558,349 Other debt securities — 4,793 160,814 165,607 Equity securities (6) 6,255,413 416,171 28,359 6,699,943 Marketable equity securities 6,255,413 416,171 — 6,671,584 Nonmarketable equity securities — — 28,359 28,359 Others (3)(4) 955,548 93,042 8,660 1,057,250 Total ¥ 41,264,242 ¥ 33,182,165 ¥ 1,309,072 ¥ 75,755,479 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 208,354 ¥ 7,060 ¥ — ¥ 215,414 Trading derivative liabilities 80,673 11,844,463 81,781 12,006,917 Interest rate contracts 3,085 8,659,042 12,496 8,674,623 Foreign exchange contracts 2,058 2,992,812 5,382 3,000,252 Equity contracts 75,530 117,572 33,679 226,781 Commodity contracts — 4,362 30,070 34,432 Credit derivatives — 70,675 154 70,829 Obligation to return securities received as collateral 3,030,974 145,988 — 3,176,962 Others (5) — 507,700 (25,528 ) 482,172 Total ¥ 3,320,001 ¥ 12,505,211 ¥ 56,253 ¥ 15,881,465 At March 31, 2019 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 12,821,328 ¥ 13,725,079 ¥ 785,326 ¥ 27,331,733 Debt securities Japanese national government and Japanese government agency bonds 2,117,841 512,134 — 2,629,975 Japanese prefectural and municipal bonds — 117,799 — 117,799 Foreign government and official institution bonds 9,264,028 454,365 792 9,719,185 Corporate bonds — 3,203,585 31,384 3,234,969 Residential mortgage-backed securities — 7,038,353 35,181 7,073,534 Asset-backed securities — 253,274 627,678 880,952 Other debt securities — 747 35,148 35,895 Commercial paper — 1,473,693 — 1,473,693 Equity securities (2) 1,439,459 671,129 55,143 2,165,731 Trading derivative assets 63,582 13,047,590 93,313 13,204,485 Interest rate contracts 23,430 10,067,719 17,307 10,108,456 Foreign exchange contracts 1,115 2,771,115 22,861 2,795,091 Equity contracts 39,037 139,666 9,000 187,703 Commodity contracts — 3,727 25,684 29,411 Credit derivatives — 65,363 18,461 83,824 Investment securities: Available-for-sale 22,550,086 10,684,983 283,434 33,518,503 Japanese national government and Japanese government agency bonds 20,635,872 3,441,824 — 24,077,696 Japanese prefectural and municipal bonds — 2,226,566 — 2,226,566 Foreign government and official institution bonds 1,914,214 707,959 19,246 2,641,419 Corporate bonds — 1,126,535 4,196 1,130,731 Residential mortgage-backed securities — 1,615,336 15 1,615,351 Commercial mortgage-backed securities — 128,917 2,038 130,955 Asset-backed securities — 1,371,467 131,455 1,502,922 Other debt securities — 66,379 126,484 192,863 Equity securities (6) 5,982,629 375,914 27,820 6,386,363 Marketable equity securities 5,982,629 375,914 — 6,358,543 Nonmarketable equity securities (7) — — 27,820 27,820 Others (3)(4) 807,193 42,184 32,378 881,755 Total ¥ 42,224,818 ¥ 37,875,750 ¥ 1,222,271 ¥ 81,322,839 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 157,114 ¥ 5,796 ¥ — ¥ 162,910 Trading derivative liabilities 88,329 12,701,110 57,143 12,846,582 Interest rate contracts 35,179 9,839,618 21,496 9,896,293 Foreign exchange contracts 2,633 2,663,347 4,670 2,670,650 Equity contracts 50,517 126,737 6,138 183,392 Commodity contracts — 2,916 24,735 27,651 Credit derivatives — 68,492 104 68,596 Obligation to return securities received as collateral 2,912,355 174,671 — 3,087,026 Others (5) — 426,368 65,648 492,016 Total ¥ 3,157,798 ¥ 13,307,945 ¥ 122,791 ¥ 16,588,534 Notes: (1) Includes securities measured under the fair value option. (2) Excludes certain investments valued at net asset value of private equity funds whose fair values were ¥21,517 million and ¥40,400 million at March 31, 2018 and 2019, respectively. The amounts of unfunded commitments related to these private equity funds were ¥61,463 million and ¥94,483 million at March 31, 2018 and 2019, respectively. (3) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivative assets designated as hedging instruments. (4) Excludes certain investments valued at net asset value of private equity funds, whose fair values at March 31, 2018 was ¥35 million, and those at March 31, 2019 was nil, respectively. There was no amount of unfunded commitments related to these private equity funds at March 31, 2018 and 2019. (5) Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments. (6) The table above reflects changes in presentation that were made to equity investment securities at March 31, 2018. See Note 1 for further information. (7) Excludes certain investments valued at net asset value of real estate funds and private funds, whose fair values at March 31, 2019 were ¥17,583 million, and ¥9,921 million, respectively. The amounts of unfunded commitments related to these real estate funds and private funds at March 31, 2019 were ¥2,054 million, and nil, respectively.
Reconciliation of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 Inputs [Table Text Block]	March 31, Total gains (losses) Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 799,493 ¥ (25,944 ) (2) ¥ — ¥ 702,402 ¥ — ¥ (281,927 ) ¥ (376,333 ) ¥ 34,986 ¥ (25,184 ) ¥ 827,493 ¥ (26,391 ) (2) Debt securities Japanese national government and Japanese government agency bonds — (4 ) — 1,079 — — — — (1,075 ) — — Foreign government and official institution bonds 1,836 720 — 107,685 — (107,157 ) (1,064 ) — (973 ) 1,047 (2 ) Corporate bonds 25,521 (6,424 ) — 3,170 — (533 ) (10,391 ) 34,885 (5) (23,136 ) (5) 23,092 (6,377 ) Residential mortgage-backed securities 47,914 1,014 — — — — (7,787 ) — — 41,141 829 Asset-backed securities 654,814 (21,124 ) — 576,668 — (172,324 ) (353,397 ) — — 684,637 (19,387 ) Other debt securities 35,552 (2,102 ) — — — — — — — 33,450 (2,102 ) Equity securities 33,856 1,976 — 13,800 — (1,913 ) (3,694 ) 101 — 44,126 648 Trading derivatives—net 37,245 3,912 (2) 520 1,367 (1,518 ) — (23,699 ) (466 ) (5,242 ) 12,119 (9,055 ) (2) Interest rate contracts—net 28,551 (4,730 ) (42 ) — — — (8,810 ) (2,433 ) 2,060 14,596 (3,908 ) Foreign exchange contracts—net 14,858 (2,434 ) 294 26 — — (67 ) 1,996 (5) (7,937 ) 6,736 1,713 Equity contracts—net (6,312 ) 12,518 272 687 (1,154 ) — (17,302 ) (29 ) (5) 635 (5) (10,685 ) (5,446 ) Commodity contracts—net 370 30 (4 ) 654 (364 ) — (3 ) — — 683 116 Credit derivatives—net (222 ) (1,472 ) — — — — 2,483 — — 789 (1,530 ) Investment securities: Available-for-sale 337,526 4,831 (3) (15,344 ) 319,092 — (163 ) (264,616 ) 93 (30,759 ) 350,660 (167 ) (3) Foreign government and official institution bonds 20,099 — (186 ) 621 — — (342 ) — — 20,192 — Corporate bonds 36,932 150 (43 ) 521 — (52 ) (805 ) 93 (5) (30,759 ) (5) 6,037 (167 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,971 — 4 — — — (545 ) — — 2,430 — Asset-backed securities 116,919 4,681 (9,605 ) 306,680 — — (257,503 ) — — 161,172 — Other debt securities 160,590 — (5,514 ) 11,270 — (111 ) (5,421 ) — — 160,814 — Equity securities 26,292 1,640 (3) — 3,930 — (2,782 ) (7 ) — (714 ) 28,359 300 (3) Nonmarketable equity securities 26,292 1,640 — 3,930 — (2,782 ) (7 ) — (714 ) 28,359 300 Others 3,850 (426 ) (7) (37 ) 5,584 — (311 ) — — — 8,660 (592 ) (7) Total ¥ 1,204,406 ¥ (15,987 ) ¥ (14,861 ) ¥ 1,032,375 ¥ (1,518 ) ¥ (285,183 ) ¥ (664,655 ) ¥ 34,613 ¥ (61,899 ) ¥ 1,227,291 ¥ (35,905 ) Liabilities Others ¥ 28,432 ¥ 4,508 (4) ¥ (2,005 ) ¥ — ¥ 6,601 ¥ — ¥ (27,824 ) ¥ 1,056 (6) ¥ (31,290 ) (6) ¥ (25,528 ) ¥ 35,010 (4) Total ¥ 28,432 ¥ 4,508 ¥ (2,005 ) ¥ — ¥ 6,601 ¥ — ¥ (27,824 ) ¥ 1,056 ¥ (31,290 ) ¥ (25,528 ) ¥ 35,010 March 31, Total gains (losses) for the period Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 827,493 ¥ 23,848 (2) ¥ (1,341 ) ¥ 454,048 ¥ — ¥ (316,384 ) ¥ (213,944 ) ¥ 29,445 ¥ (17,839 ) ¥ 785,326 ¥ 18,299 (2) Debt securities Foreign government and official institution bonds 1,047 863 — 117,619 — (118,377 ) (317 ) — (43 ) 792 5 Corporate bonds 23,092 611 — 2,040 — (1,798 ) (4,188 ) 29,423 (5) (17,796 ) (5) 31,384 286 Residential mortgage-backed securities 41,141 (282 ) — — — — (5,678 ) — — 35,181 (289 ) Asset-backed securities 684,637 18,692 (1,341 ) 315,865 — (195,851 ) (194,324 ) — — 627,678 15,528 Other debt securities 33,450 1,698 — — — — — — — 35,148 1,698 Equity securities 44,126 2,266 — 18,524 — (358 ) (9,437 ) 22 — 55,143 1,071 Trading derivatives—net 12,119 (5,871 ) (2) (744 ) 787 (682 ) — 37 20,192 10,332 36,170 (25,241 ) (2) Interest rate contracts—net 14,596 12,397 57 — (119 ) — (25,601 ) (7,013 ) 1,494 (4,189 ) 11,507 Foreign exchange contracts—net 6,736 (10,997 ) (419 ) 210 — — (322 ) 27,230 (5) (4,247 ) 18,191 (10,451 ) Equity contracts—net (10,685 ) 18,756 (374 ) 13 (228 ) — (17,680 ) (25 ) (5) 13,085 (5) 2,862 (752 ) Commodity contracts—net 683 32 6 564 (335 ) — (1 ) — — 949 795 Credit derivatives—net 789 (26,059 ) (14 ) — — — 43,641 — — 18,357 (26,340 ) Investment securities: Available-for-sale 350,660 6,415 (3) (9,791 ) 273,201 — — (338,180 ) 1,456 (327 ) 283,434 (498 ) (3) Foreign government and official institution bonds 20,192 — (876 ) 645 — — (715 ) — — 19,246 — Corporate bonds 6,037 (345 ) 3 3,450 — — (6,078 ) 1,456 (5) (327 ) (5) 4,196 (498 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,430 — (135 ) — — — (257 ) — — 2,038 — Asset-backed securities 161,172 6,760 (5,016 ) 263,587 — — (295,048 ) — — 131,455 — Other debt securities 160,814 — (3,767 ) 5,519 — — (36,082 ) — — 126,484 — Equity securities 28,359 (2,298 ) (3) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) (3) Nonmarketable equity securities 28,359 (2,298 ) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) Others 8,660 (1,022 ) (7) (20 ) 24,961 — (206 ) — 5 — 32,378 (1,191 ) (7) Total ¥ 1,227,291 ¥ 21,072 ¥ (11,896 ) ¥ 756,792 ¥ (682 ) ¥ (318,008 ) ¥ (552,087 ) ¥ 51,098 ¥ (8,452 ) ¥ 1,165,128 ¥ (11,691 ) Liabilities Others ¥ (25,528 ) ¥ (19,629 ) (4) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 (6) ¥ 35,230 (6) ¥ 65,648 ¥ (10,778 ) (4) Total ¥ (25,528 ) ¥ (19,629 ) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 ¥ 35,230 ¥ 65,648 ¥ (10,778 ) Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account profits (losses)—net and in Foreign exchange losses—net. (3) Included in Investment securities gains (losses)—net. (4) Included in Trading account profits (losses)—net. (5) Transfers into Level 3 for Foreign exchange contract were mainly caused by the valuation using certain unobservable input. Transfers into (out of) Level 3 for corporate bonds were caused by the decrease (increase) in liquidity or the availability of the quoted prices provided by third-party venders and Equity contracts—net were mainly caused by the change of valuation model and the change cease using certain unobservable input. (6) Transfers into (out of) Level 3 for bifurcated embedded derivatives in Others were mainly caused by the decrease (increase) in the observability of the key inputs to the valuation models and a corresponding increase (decrease) in the significance of the unobservable inputs. (7) Included in Other non-interest (8) The table above reflects changes in presentation that were made to equity investment securities at March 31, 2018. See Note 1 for further information.
Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level [Table Text Block]	2018 2019 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ — ¥ 1,984 ¥ 1,984 ¥ — ¥ 80,779 ¥ 4,208 ¥ 84,987 Loans 3,458 8,329 239,653 251,440 2,656 9,104 250,678 262,438 Loans held for sale — — 22,835 22,835 — — 77,506 77,506 Collateral dependent loans 3,458 8,329 216,818 228,605 2,656 9,104 173,172 184,932 Premises and equipment — — 34,326 34,326 — — 35,352 35,352 Intangible assets — — 9,402 9,402 — — 19,635 19,635 Other assets 92,223 — 6,196 98,419 136,528 49,756 9,774 196,058 Investments in equity method investees (1) 92,223 — — 92,223 136,528 49,756 — 186,284 Other — — 6,196 6,196 — — 9,774 9,774 Total ¥ 95,681 ¥ 8,329 ¥ 291,561 ¥ 395,571 ¥ 139,184 ¥ 139,639 ¥ 319,647 ¥ 598,470 Notes: (1) Excludes certain investments valued at net asset value of ¥8,443 million and ¥8,866 million at March 31, 2018 and 2019, respectively. The unfunded commitments related to these investments are ¥1,544 million and ¥12,242 million at March 31, 2018 and 2019, respectively. These investments are in private equity funds and limited partnerships. (2) Includes certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including impairment and observable price change for nonmarketable equity securities measured under the measurement alternative.
Losses (Gains) Recorded as a Result of Changes in Fair Value Measured on a Nonrecurring Basis [Table Text Block]	2018 2019 (in millions) Investment securities ¥ 1,423 ¥ (50,785 ) Loans 47,352 30,153 Loans held for sale 990 4,762 Collateral dependent loans 46,362 25,391 Premises and equipment 39,361 31,345 Intangible assets 21,900 118,108 Other assets 30,852 59,557 Investments in equity method investees 29,442 51,645 Other 1,410 7,912 Total ¥ 140,888 ¥ 188,378
Gains (Losses) Related to Instruments for which Fair Value Option was Elected [Table Text Block]	2017 2018 2019 Trading Foreign Total Trading Foreign Total Trading Foreign Total (in millions) Financial assets: Trading account securities (1) ¥ (464,947 ) ¥ (407,439 ) ¥ (872,386 ) ¥ (148,242 ) ¥ (267,507 ) ¥ (415,749 ) ¥ 208,952 ¥ 186,578 ¥ 395,530 Total ¥ (464,947 ) ¥ (407,439 ) ¥ (872,386 ) ¥ (148,242 ) ¥ (267,507 ) ¥ (415,749 ) ¥ 208,952 ¥ 186,578 ¥ 395,530 Financial liabilities: Other short-term borrowings (2) ¥ (10,380 ) ¥ — ¥ (10,380 ) ¥ 5,902 ¥ — ¥ 5,902 ¥ (5,559 ) ¥ — ¥ (5,559 ) Long-term debt (2) (93,464 ) — (93,464 ) 7,554 — 7,554 (8,322 ) — (8,322 ) Total ¥ (103,844 ) ¥ — ¥ (103,844 ) ¥ 13,456 ¥ — ¥ 13,456 ¥ (13,881 ) ¥ — ¥ (13,881 ) Notes: (1) Excludes Danamon’s equity securities. See Note 2 for reference. (2) Change in value attributable to the instrument-specific credit risk related to those financial liabilities are not material.
Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding [Table Text Block]	2018 2019 Remaining Fair value Fair value Remaining Fair value Fair value (in millions) Financial liabilities: Long-term debt ¥ 347,002 ¥ 333,985 ¥ (13,017 ) ¥ 358,730 ¥ 325,808 ¥ (32,922 ) Total ¥ 347,002 ¥ 333,985 ¥ (13,017 ) ¥ 358,730 ¥ 325,808 ¥ (32,922 )
Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Not Carried at Fair Value on Recurring Basis on Consolidated Balance Sheets by Level [Table Text Block]	Carrying Estimated fair value At March 31, 2018 Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 32,648 ¥ 32,648 ¥ 32,648 ¥ — ¥ — Interest-earning deposits in other banks 43,210 43,210 — 43,210 — Call loans and funds sold 896 896 — 896 — Receivables under resale agreements 5,726 5,726 — 5,726 — Receivables under securities borrowing transactions 9,269 9,269 — 9,269 — Investment securities (1)(2) 3,684 3,797 1,197 1,051 1,549 Loans, net of allowance for credit losses (3) 116,272 117,753 3 330 117,420 Other financial assets (4) 7,000 7,000 — 7,000 — Financial liabilities: Deposits Non-interest-bearing ¥ 29,862 ¥ 29,862 ¥ — ¥ 29,862 ¥ — Interest-bearing 165,831 165,825 — 165,825 — Total deposits 195,693 195,687 — 195,687 — Call money and funds purchased 2,453 2,453 — 2,453 — Payables under repurchase agreements 18,135 18,135 — 18,135 — Payables under securities lending transactions 8,170 8,170 — 8,170 — Due to trust account 3,386 3,386 — 3,386 — Other short-term borrowings 6,617 6,617 — 6,617 — Long-term debt 26,861 26,919 — 26,919 — Other financial liabilities 6,642 6,642 — 6,642 — Carrying Estimated fair value At March 31, 2019 Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 33,924 ¥ 33,924 ¥ 33,924 ¥ — ¥ — Interest-earning deposits in other banks 40,647 40,647 — 40,647 — Call loans and funds sold 1,110 1,110 — 1,110 — Receivables under resale agreements 10,975 10,975 — 10,975 — Receivables under securities borrowing transactions 2,759 2,759 — 2,759 — Investment securities 4,442 4,453 1,197 1,135 2,121 Loans, net of allowance for credit losses (3) 116,213 117,064 3 247 116,814 Other financial assets (4) 7,455 7,455 — 7,455 — Financial liabilities: Deposits Non-interest-bearing ¥ 30,443 ¥ 30,443 ¥ — ¥ 30,443 ¥ — Interest-bearing 168,846 168,899 — 168,899 — Total deposits 199,289 199,342 — 199,342 — Call money and funds purchased 2,450 2,450 — 2,450 — Payables under repurchase agreements 25,225 25,225 — 25,225 — Payables under securities lending transactions 913 913 — 913 — Due to trust account 2,736 2,736 — 2,736 — Other short-term borrowings 6,441 6,441 — 6,441 — Long-term debt 27,790 27,968 — 27,968 — Other financial liabilities 6,781 6,781 — 6,781 — Notes: (1) Includes impaired securities measured at fair value on a nonrecurring basis at March 31, 2018. Refer to “Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis” for the details of the level classification. (2) Excludes cost-method investments of ¥437 billion at March 31, 2018, of which the MUFG Group did not estimate the fair value since it was not practical and no impairment indicators were identified. See Note 3 for the details of these cost-method investments. (3) Includes loans held for sale and collateral dependent loans measured at fair value on a nonrecurring basis. Refer to “Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis” for the details of the level classification. (4) Excludes investments in equity method investees of ¥2,219 billion and ¥2,487 billion at March 31, 2018 and 2019, respectively.
Fair Value, Measurements, Recurring [Member]
Quantitative Information about Level 3 Fair Value Measurements [Table Text Block]	At March 31, 2018 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 20,192 Return on equity method Probability of default 0.0%~0.4% 0.2 % Recovery rate 60.0%~70.0% 66.7 % Market-required return on capital 8.0%~10.0% 9.5 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 110,536 Discounted cash flow Probability of default 1.2%~5.3% 4.5 % Recovery rate 60.0%~76.0% 66.3 % 684,586 Internal model (4) Asset correlations 9.0% 9.0 % Discount factor 1.0% 1.0 % Prepayment rate 37.2% 37.2 % Probability of default 0.0%~91.3% — (3) Recovery rate 65.3% 65.3 % Other debt securities 33,450 Discounted cash flow Liquidity premium 0.5%~2.4% 0.8 % 149,759 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 40.0%~90.0% 72.5 % Market-required return on capital 8.0%~10.0% 9.7 % At March 31, 2018 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net 14,460 Option model Probability of default 0.0%~12.5% Correlation between interest rates 34.1%~52.7% Correlation between interest rate and foreign exchange rate 19.7%~50.4% Recovery rate 41.0%~46.0% Volatility 13.4%~100.0% Probability of prepayment 100.0% Foreign exchange contracts—net 6,779 Option model Probability of default 0.0%~12.5% Correlation between interest rates 40.3%~74.0% Correlation between interest rate and foreign exchange rate 28.1%~50.7% Recovery rate 41.0%~46.0% Correlation between underlying assets 85.0% Volatility 10.3%~16.2% Equity contracts—net (16,600 ) Option model Correlation between interest rate and equity 37.1%~39.0% Correlation between foreign exchange rate and equity 7.0%~65.2% Correlation between equities 20.6%~81.7% Correlation between underlying assets 76.0% 6,528 Discounted cash flow Term of litigation 2.0 years At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 19,246 Return on equity method Probability of default 0.0%~0.4% 0.3 % Recovery rate 60.0%~70.0% 66.7 % Market-required return on capital 10.0% 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 109,213 Discounted cash flow Probability of default 1.2%~5.3% 5.0 % Recovery rate 60.0%~76.0% 67.2 % Loan price 90.5%~100.3% 95.4 % 587,577 Internal model (4) Asset correlations 10.0% 10.0 % Discount factor 1.0%~1.2% 1.2 % Prepayment rate 22.7% 22.7 % Probability of default 0.0%~90.1% — (3) Recovery rate 64.3% 64.3 % Other debt securities 35,148 Discounted cash flow Liquidity premium 1.0%~2.4% 1.3 % 112,822 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 40.0%~90.0% 78.0 % Market-required return on capital 8.0%~10.0% 9.5 % At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net (4,189 ) Option model Probability of default 0.0%~12.0% Correlation between interest rates 29.2%~51.3% Correlation between interest rate and foreign exchange rate 22.8%~60.0% Recovery rate 41.0%~48.0% Volatility 11.0%~71.3% Foreign exchange contracts—net 18,198 Option model Probability of default 0.0%~12.0% Correlation between interest rates 35.0%~70.0% Correlation between interest rate and foreign exchange rate 14.8%~60.0% Recovery rate 41.0%~48.0% Correlation between underlying assets 65.0% Volatility 9.7%~18.2% Equity contracts—net (2,727 ) Option model Correlation between foreign exchange rate and equity 7.0%~64.1% Correlation between equities 21.6%~80.3% Correlation between underlying assets 51.7%~82.0% Volatility 21.0%~30.0% 5,878 Discounted cash flow Term of litigation 1.0 year Notes: (1) The fair value as of March 31, 2018 and 2019 excludes the fair value of investments valued using vendor prices. (2) Weighted averages are calculated by weighing each input by the relative fair value of the respective financial instruments. (3) See “Probability of default” in “Sensitivity to and range of unobservable inputs.” (4) For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities.”

Stock-based Compensation _Tex_2

Stock-based Compensation [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2019
Stock Option Plan [Member]
Summary of Stock Acquisition Rights Transactions [Table Text Block]	Number of Weighted average Weighted average Aggregate (in years) (in millions) Outstanding, beginning of fiscal year 606,400 ¥ 1 Transitioned to the Board Incentive Plan (1) (121,100 ) 1 Outstanding, end of fiscal year 485,300 ¥ 1 22.86 ¥ 266 Exercisable, end of fiscal year — ¥ — — ¥ — Notes: (1) All shares transitioned to the Board Incentive Plan were granted and vested. See the explanation of the following item, The Board Incentive Plan (2) There were no issuances under the Stock Option Plan during the fiscal years ended March 31, 2017, 2018 and 2019.
Board Incentive Plan [Member]
Roll-forward of Common Share of MUFG [Table Text Block]	2019 The BIP Trust I The BIP Trust II Number of Weighted— Number of Weighted— Nonvested, beginning of fiscal year 2,085,633 ¥ 533.17 7,045,349 ¥ 524.43 Granted 6,959,500 722.10 6,090,100 722.10 Vested (2,654,379 ) 630.44 (1,825,882 ) 659.75 Forfeited (850,072 ) 544.77 (6,566,937 ) 527.37 Nonvested, end of fiscal year 5,540,682 ¥ 722.10 4,742,630 ¥ 722.10
Summary of Compensation Costs and Tax Benefits [Table Text Block]	2017 2018 2019 The BIP The BIP The BIP The BIP The BIP The BIP The BIP The BIP The BIP (in millions) Compensation costs ¥1,238 ¥1,039 ¥2,112 ¥2,514 ¥1,452 ¥218 ¥1,601 ¥723 ¥520 Tax benefit 379 318 385 770 445 67 490 221 159 Unrecognized compensation costs 1,617 346 — 396 360 — 2,604 182 —
MUAH Plan [Member] | MUAH [Member]
Roll-forward of Restricted Stock Units [Table Text Block]	Restricted Stock Units 2018 Number of Units Weighted Average Grant Units outstanding, beginning of fiscal year 27,838,414 $ 5.86 Activity during fiscal year: Granted 14,667,730 5.89 Vested (13,198,540 ) 5.88 Forfeited (864,534 ) 5.97 Units outstanding, end of fiscal year 28,443,070 5.86
Summary of Compensation Costs and Tax Benefits [Table Text Block]	2016 2017 2018 (in millions) Compensation costs ¥ 7,292 ¥ 7,405 ¥ 8,503 Tax benefit 2,830 2,917 2,209 Unrecognized compensation costs 11,183 12,543 12,210

Parent Company Only Financial_2

Parent Company Only Financial Information [Text Block] (Tables) - MUFG [Member]	12 Months Ended
	Mar. 31, 2019
Condensed Balance Sheets [Table Text Block]	Condensed Balance Sheets As of March 31, 2018 2019 (in millions) Assets: Cash and interest-earning deposits with banking subsidiaries ¥ 114,784 ¥ 203,713 Investments in subsidiaries and affiliated companies 16,720,286 16,668,232 Banking subsidiaries 12,638,315 12,754,653 Non-banking 4,081,971 3,913,579 Loans to subsidiaries 5,072,330 7,199,052 Banking subsidiaries 4,885,830 6,864,309 Non-banking 186,500 334,743 Other assets 166,514 223,725 Total assets ¥ 22,073,914 ¥ 24,294,722 Liabilities and Shareholders’ equity: Short-term borrowings from banking subsidiaries ¥ 1,600,179 ¥ 1,425,682 Long-term debt from non-banking 264,332 277,138 Long-term debt 5,088,478 7,187,469 Other liabilities 150,743 204,885 Total liabilities 7,103,732 9,095,174 Total shareholders’ equity 14,970,182 15,199,548 Total liabilities and shareholders’ equity ¥ 22,073,914 ¥ 24,294,722
Condensed Statements of Income [Table Text Block]	Condensed Statements of Income Fiscal years ended March 31, 2017 2018 2019 (in millions) Income: Dividends from subsidiaries and affiliated companies ¥ 608,504 ¥ 576,332 ¥ 306,879 Banking subsidiaries 535,512 487,491 207,161 Non-banking 72,992 88,841 99,718 Management fees from subsidiaries 26,095 26,073 28,305 Interest income from subsidiaries 48,665 80,670 127,117 Foreign exchange gains (losses)—net 3,614 24,726 (20,598 ) Trading account losses—net (41,279 ) (26,749 ) (8,078 ) Gains on sales of investment in subsidiaries and affiliated companies — — 252,253 Other income 1,427 1,508 3,199 Total income 647,026 682,560 689,077 Expense: Operating expenses 25,692 26,016 28,168 Interest expense to subsidiaries and affiliated companies 28,867 31,426 34,594 Interest expense 35,689 65,068 108,756 Other expense 2,554 1,791 1,657 Total expense 92,802 124,301 173,175 Equity in undistributed net income (loss) of subsidiaries and affiliated companies—net (362,899 ) 672,421 194,390 Income before income tax expense (benefit) 191,325 1,230,680 710,292 Income tax expense (benefit) (11,355 ) 2,520 (8,353 ) Net income ¥ 202,680 ¥ 1,228,160 ¥ 718,645
Condensed Statements of Cash Flows [Table Text Block]	Condensed Statements of Cash Flows Fiscal years ended March 31, 2017 2018 2019 (in millions) Operating activities: Net income ¥ 202,680 ¥ 1,228,160 ¥ 718,645 Adjustments and other 371,901 (799,571 ) (351,775 ) Net cash provided by operating activities 574,581 428,589 366,870 Investing activities: Proceeds from sales of investment in subsidiaries and affiliated companies 1,574 — 455,605 Purchase of equity investment in subsidiaries and an affiliated company (91,877 ) (53,000 ) (18,346 ) Net increase in loans to subsidiaries (1,802,664 ) (1,682,576 ) (2,112,711 ) Other—net (2,659 ) (4,361 ) (9,009 ) Net cash used in investing activities (1,895,626 ) (1,739,937 ) (1,684,461 ) Financing activities: Net decrease in short-term borrowings from subsidiaries (32,412 ) (41,402 ) (194,300 ) Proceeds from issuance of long-term debt 1,808,672 1,872,986 2,043,677 Repayment of long-term debt (20 ) (112,184 ) (314 ) Repayment of long-term debt to affiliated companies (1,136 ) (1,090 ) (500 ) Proceeds from sales of treasury stock 1 1 3 Payments for acquisition of treasury stock (200,028 ) (200,038 ) (150,277 ) Dividends paid (246,564 ) (241,067 ) (276,279 ) Other—net (9,333 ) (9,677 ) (15,490 ) Net cash provided by financing activities 1,319,180 1,267,529 1,406,520 Net increase (decrease) in cash and cash equivalents (1,865 ) (43,819 ) 88,929 Cash and cash equivalents at beginning of fiscal year 160,468 158,603 114,784 Cash and cash equivalents at end of fiscal year ¥ 158,603 ¥ 114,784 ¥ 203,713

Basis of Financial Statements_4

Basis of Financial Statements and Summary of Significant Accounting Policies (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Apr. 01, 2019	Apr. 01, 2018
Basis of financial statements:
Increase (decrease) to net income attributable to MUFG as the effect of recording intervening events for the three-month periods ended March 31 on MUFG's proportionate equity in net income of subsidiaries with fiscal years ended on December 31	¥ 19,970	¥ (10,760)	¥ 10,220
Summary of significant accounting policies:
Floor percentage of the corridor defined for the amortization of net actuarial gains and losses	10.00%
Under Modified Retrospective Approach [Member] | Lease [Member]
Accounting changes:
Right-of-Use Assets				¥ 400,000
Lease liabilities				¥ 500,000
Retained Earnings Appropriated for Legal Reserve [Member] | Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accounting changes:
Cumulative effect of change on Equity					¥ 2,702,000
Retained Earnings Appropriated for Legal Reserve [Member] | Recognition of Breakage for Certain Prepaid Stored-Value Products [Member]
Accounting changes:
Cumulative effect of change on Equity					1,784
Accumulated Other Comprehensive Income (Loss), Net of Taxes [Member] | Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accounting changes:
Cumulative effect of change on Equity					¥ (2,702,000)
Minimum [Member]
Summary of significant accounting policies:
Threshold of "more likely than not" recognition for a tax position	50.00%
Minimum [Member] | Commercial [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month	1 month
Minimum [Member] | Card [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month	3 months
Minimum [Member] | MUAH [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month	3 months
Minimum [Member] | Krungsri [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month	3 months
Minimum [Member] | Residential [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month	6 months

Basis of Financial Statements_5

Basis of Financial Statements and Summary of Significant Accounting Policies (Estimated Useful Lives of Premises and Equipment) (Detail)	12 Months Ended
	Mar. 31, 2019
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	15 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	50 years
Equipment and Furniture [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	2 years
Equipment and Furniture [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	20 years
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	5 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	39 years

Basis of Financial Statements_6

Basis of Financial Statements and Summary of Significant Accounting Policies (Useful Lives of Intangible Assets and Amortization Method by Major Class) (Detail)	12 Months Ended
	Mar. 31, 2019
Software [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line
Software [Member] | Minimum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	2 years
Software [Member] | Maximum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	10 years
Core Deposit Intangibles [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line
Core Deposit Intangibles [Member] | Minimum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	10 years
Core Deposit Intangibles [Member] | Maximum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	16 years
Customer Relationships [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line, Declining-balance
Customer Relationships [Member] | Minimum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	7 years
Customer Relationships [Member] | Maximum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	27 years
Trade Names [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line
Trade Names [Member] | Minimum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	7 years
Trade Names [Member] | Maximum [Member]
Finite-lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	40 years

Business Developments (Narrativ

Business Developments (Narrative) (Detail) ¥ / shares in Units, Rp / shares in Units, ¥ in Millions, € in Billions, Rp in Billions, $ in Billions

Aug. 03, 2018JPY (¥)

Aug. 03, 2018IDR (Rp)Rp / shares

Dec. 29, 2017JPY (¥)

Dec. 29, 2017IDR (Rp)Rp / shares

Oct. 02, 2017JPY (¥)

Oct. 04, 2016JPY (¥)

Oct. 03, 2016JPY (¥)

Sep. 12, 2016JPY (¥)

Apr. 30, 2016JPY (¥)

Apr. 01, 2016JPY (¥)

Oct. 31, 2018JPY (¥)Subsidiaries

Oct. 31, 2018AUD ($)Subsidiaries

Mar. 31, 2019JPY (¥)Offices

Mar. 31, 2017JPY (¥)

Mar. 01, 2019JPY (¥)

Mar. 01, 2019EUR (€)

Aug. 03, 2018¥ / shares

Mar. 31, 2018JPY (¥)

Dec. 29, 2017¥ / shares

Dec. 26, 2017

May 15, 2017JPY (¥)

Business Developments [Line Items]

Goodwill, recorded on acquisition

¥ 433,891

¥ 450,143

¥ 441,334

Liability recognized in Other liabilities

7,358,506

7,407,413

Reduction in Noncontrolling interests

(785,200)

(675,633)

Reduction in Capital surplus

(5,577,186)

(5,740,165)

Increase in Accumulated other comprehensive income, net of taxes

¥ (284,269)

2,281,423

¥ 2,477,315

MUFG Bank's Acquisition of Security Bank Corporation's Shares [Member]

Business Developments [Line Items]

Equity interest after acquisition, in aggregated percentage

20.00%

Equity interest for acquisition

¥ 91,993

Mitsubishi UFJ Trust and Banking's Acquisition of Capital Analytics II LLC [Member]

Business Developments [Line Items]

Ownership acquired, in percentage

100.00%

Business acquisition in cash

¥ 4,494

Goodwill, recorded on acquisition

2,858

Intangible assets, recorded on acquisition

¥ 1,388

Measurement period adjustment for goodwill applied to the acquisition date fair value

¥ (115)

Krungsri's Acquisition of Hattha Kaksekar Limited [Member]

Business Developments [Line Items]

Ownership acquired, in percentage

100.00%

Business acquisition in cash

¥ 15,703

Goodwill, recorded on acquisition

8,280

Intangible assets, recorded on acquisition

¥ 476

MUFG's Acquisition of Hitachi Capital Corporation's Shares [Member]

Business Developments [Line Items]

Equity interest after acquisition, in aggregated percentage

23.00%

Equity interest for acquisition

¥ 91,877

Mitsubishi UFJ Trust and Banking's Acquisition of Rydex Fund Services, LLC [Member]

Business Developments [Line Items]

Ownership acquired, in percentage

100.00%

Business acquisition in cash

¥ 17,431

Goodwill, recorded on acquisition

5,232

Intangible assets, recorded on acquisition

¥ 11,507

Mitsubishi UFJ NICOS becomes a Wholly-Owned Subsidiary of MUFG [Member]

Business Developments [Line Items]

Ownership acquired, in percentage

15.02%

Business acquisition in cash

¥ 50,000

Liability recognized in Other liabilities

¥ 50,000

Reduction in Noncontrolling interests

15,390

Reduction in Capital surplus

34,751

Increase in Accumulated other comprehensive income, net of taxes

¥ 141

Settlement of Other Liabilities

¥ 50,000

MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member]

Business Developments [Line Items]

Number of offices in Indonesia | Offices

1,800

Description of strategic investment

Will be executed through three steps (the "Proposed Transaction"), and the completion of the Proposed Transaction will result in MUFG Bank becoming the largest shareholder in Danamon and Danamon becoming a consolidated subsidiary of MUFG Bank.

Equity interest after acquisition, in aggregated percentage

40.00%

40.00%

19.90%

19.90%

Additional equity interests acquired, in percentage

20.10%

20.10%

Price per share paid | (per share)

Rp 8,921

Rp 8,323

¥ 69

[1]

¥ 70

[2]

Investment amount paid

¥ 132,300

[1]

Rp 17,187

¥ 133,000

[2]

Rp 15,875

Description of Calculation basis

A price book-value ratio of 2.0 calculated on the basis of Danamon's net assets as of June 30, 2018 with certain adjustments applied.

A price book-value ratio of 2.0 calculated on the basis of Danamon's net assets as of June 30, 2018 with certain adjustments applied.

A price book-value ratio of 2.0 calculated on the basis of Danamon's net assets as of September 30, 2017 with certain adjustments applied.

A price book-value ratio of 2.0 calculated on the basis of Danamon's net assets as of September 30, 2017 with certain adjustments applied.

Price book-value ratio

2

2

2

2

Exchange rate of IDR

0.0077

0.0084

0.0077

0.0084

MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] | Minimum [Member]

Business Developments [Line Items]

Final equity interest expected upon the completion of proposed transactions

73.80%

Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member]

Business Developments [Line Items]

Equity interest after acquisition, in aggregated percentage

100.00%

100.00%

Number of subsidiaries acquired | Subsidiaries

9

9

Equity interest for acquisition

¥ 328,000

$ 4

MUFG Bank's Acquisition of DVB Bank SE's Aviation Finance Division [Member]

Business Developments [Line Items]

Aviation finance client lending portfolio transferred

¥ 716,300

€ 5.6

[1]

Calculated based on the exchange rate of IDR1 = ¥0.0077

[2]

Calculated based on the exchange rate of IDR1 = ¥0.0084

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Investment Securities [Line Items]
Gross realized gains on sales of Available-for-sale debt securities and marketable equity securities		¥ 330,508	¥ 367,548
Gross realized losses on sales of Available-for-sale debt securities and marketable equity securities		49,290	63,031
Gross realized gains on sales of Available-for-sale debt securities	¥ 45,244
Gross realized losses on sales of Available-for-sale debt securities	16,541
Carrying value of Held-to-maturity securities transferred to Available-for-sale securities			14,142
Profit on the sale of Available-for-sale securities transferred from Held-to-maturity securities			669
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)-net		8,196	33,823
Other-than-temporary impairment ("OTTI") losses of debt securities included in Investment securities gains (losses)-net	606
Other-than-temporary impairment ("OTTI") losses of investment securities	596	99	706
Equity securities		2,789,392
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities
Asset-backed Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities
Other Debt Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities
Marketable Equity Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)-net		6,660	32,038
Length of time the fair value of the investment has been below cost	6 months
Threshold percentage of decline in fair value below cost as an indicator of other-than-temporary impairment ("OTTI")	20.00%
Equity securities		2,789,392
Corporate Bonds [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)-net		114	741
Other-than-temporary impairment ("OTTI") losses of debt securities included in Investment securities gains (losses)-net	¥ 606
Cumulative declines in fair value of the credit impaired debt securities	1,069	2,992
Credit loss components of impairment losses recognized in earnings	1,761	3,499	4,125	¥ 6,691
Other factors of impairment losses recognized in Accumulated OCI before taxes	¥ 692	507
Nonmarketable Equity Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)-net		1,422	1,044
Aggregate costs of cost-method investments, not estimated at the fair value		437,486
Other-than-temporary impairment ("OTTI") losses recognized on cost-method investments		1,422	¥ 1,044
Nonmarketable Equity Securities [Member] | Fair Value Estimated by Commonly Accepted Valuation Techniques [Member]
Investment Securities [Line Items]
Cost-method investments		97,586
Nonmarketable Equity Securities [Member] | Test Performed to Determine Existence of Any Impairment Indicators [Member]
Investment Securities [Line Items]
Cost-method investments		440,665
Nonmarketable Equity Securities [Member] | Carried at Cost [Member]
Investment Securities [Line Items]
Equity securities		538,251
Nonmarketable Equity Securities [Member] | Estimated Fair Value [Member]
Investment Securities [Line Items]
Equity securities		¥ 28,359

Investment Securities (Amortize

Investment Securities (Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019		Mar. 31, 2018
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	¥ 33,174,487		¥ 32,556,669
Available-for-sale debt securities, Gross unrealized gains	400,534		349,372
Available-for-sale debt securities, Gross unrealized losses	56,518		72,927
Available-for-sale debt securities, Fair value	33,518,503		32,833,114
Held-to-maturity debt securities, Amortized cost	4,441,901		3,582,941
Held-to-maturity debt securities, Gross unrealized gains	46,339		54,800
Held-to-maturity debt securities, Gross unrealized losses	35,293		17,069
Held-to-maturity debt securities, Fair value	4,452,947		3,620,672
Equity securities, Amortized cost			2,789,392
Equity securities, Gross unrealized gains			3,925,680
Equity securities, Gross unrealized losses			43,488
Equity securities, Fair value			6,671,584
Japanese National Government and Japanese Government Agency Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	23,748,558		24,272,345
Available-for-sale debt securities, Gross unrealized gains	330,115		299,402
Available-for-sale debt securities, Gross unrealized losses	977		3,843
Available-for-sale debt securities, Fair value	24,077,696		24,567,904
Held-to-maturity debt securities, Amortized cost	1,100,701		1,100,807
Held-to-maturity debt securities, Gross unrealized gains	41,619		40,212
Held-to-maturity debt securities, Gross unrealized losses
Held-to-maturity debt securities, Fair value	1,142,320		1,141,019
Japanese Prefectural and Municipal Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	2,203,978		1,532,143
Available-for-sale debt securities, Gross unrealized gains	22,593		7,808
Available-for-sale debt securities, Gross unrealized losses	5		2,520
Available-for-sale debt securities, Fair value	2,226,566		1,537,431
Foreign Government and Official Institution Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	2,648,874		2,207,662
Available-for-sale debt securities, Gross unrealized gains	18,099		8,938
Available-for-sale debt securities, Gross unrealized losses	25,554		44,908
Available-for-sale debt securities, Fair value	2,641,419		2,171,692
Held-to-maturity debt securities, Amortized cost	138,731		59,330
Held-to-maturity debt securities, Gross unrealized gains	193		383
Held-to-maturity debt securities, Gross unrealized losses	212		103
Held-to-maturity debt securities, Fair value	138,712		59,610
Corporate Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,117,302		1,104,799
Available-for-sale debt securities, Gross unrealized gains	14,251		15,589
Available-for-sale debt securities, Gross unrealized losses	822		1,028
Available-for-sale debt securities, Fair value	1,130,731		1,119,360
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,635,220		1,632,346
Available-for-sale debt securities, Gross unrealized gains	1,469		752
Available-for-sale debt securities, Gross unrealized losses	21,338		15,563
Available-for-sale debt securities, Fair value	1,615,351		1,617,535
Held-to-maturity debt securities, Amortized cost	910,990		885,965
Held-to-maturity debt securities, Gross unrealized gains	1,209		1,660
Held-to-maturity debt securities, Gross unrealized losses	21,202	[1]	14,726	[2]
Held-to-maturity debt securities, Fair value	890,997		872,899
Residential Mortgage-backed Securities [Member] | MUAH [Member]
Investment Securities [Line Items]
Unrealized losses before taxes at the date of reclassification from Available-for-sale debt securities to Held-to-maturity debt securities remaining in Accumulated OCI	10,591		3,457
Commercial Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	132,996		95,383
Available-for-sale debt securities, Gross unrealized gains	310		473
Available-for-sale debt securities, Gross unrealized losses	2,351		620
Available-for-sale debt securities, Fair value	130,955		95,236
Held-to-maturity debt securities, Amortized cost	160,267		171,647
Held-to-maturity debt securities, Gross unrealized gains	1,903		4,107
Held-to-maturity debt securities, Gross unrealized losses	2,032	[1]	1,018	[2]
Held-to-maturity debt securities, Fair value	160,138		174,736
Commercial Mortgage-backed Securities [Member] | MUAH [Member]
Investment Securities [Line Items]
Unrealized losses before taxes at the date of reclassification from Available-for-sale debt securities to Held-to-maturity debt securities remaining in Accumulated OCI	4,667		5,932
Asset-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,494,629		1,546,989
Available-for-sale debt securities, Gross unrealized gains	10,846		12,775
Available-for-sale debt securities, Gross unrealized losses	2,553		1,415
Available-for-sale debt securities, Fair value	1,502,922		1,558,349
Held-to-maturity debt securities, Amortized cost	2,131,212		1,365,192
Held-to-maturity debt securities, Gross unrealized gains	1,415		8,438
Held-to-maturity debt securities, Gross unrealized losses	11,847		1,222
Held-to-maturity debt securities, Fair value	2,120,780		1,372,408
Other Debt Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	192,930	[3]	165,002	[4]
Available-for-sale debt securities, Gross unrealized gains	2,851	[3]	3,635	[4]
Available-for-sale debt securities, Gross unrealized losses	2,918	[3]	3,030	[4]
Available-for-sale debt securities, Fair value	192,863	[3]	165,607	[4]
Other Debt Securities [Member] | Private Placement Debt Conduit Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value	¥ 112,822		152,374
Marketable Equity Securities [Member]
Investment Securities [Line Items]
Equity securities, Amortized cost			2,789,392
Equity securities, Gross unrealized gains			3,925,680
Equity securities, Gross unrealized losses			43,488
Equity securities, Fair value			¥ 6,671,584
[1]	MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale debt securities to Held-to-maturity debt securities. As a result of the reclassification of residential mortgage-backed securities and commercial mortgage-backed securities, the unrealized losses before taxes at the date of reclassification remaining in Accumulated OCI in the accompanying consolidated balance sheets were ¥10,591 million and ¥4,667 million, respectively, at March 31, 2019 and are not included in the table above.
[2]	MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale debt securities to Held-to-maturity debt securities during the fiscal year ended March 31, 2014. As a result of the reclassification of residential mortgage-backed securities and commercial mortgage-backed securities, the unrealized losses before taxes at the date of reclassification remaining in Accumulated OCI in the accompanying consolidated balance sheets were ¥3,457 million and ¥5,932 million, respectively, at March 31, 2018 and are not included in the table above.
[3]	Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds.
[4]	Other debt securities in the table above include ¥152,374 million of private placement debt conduit bonds.

Investment Securities (Amorti_2

Investment Securities (Amortized Cost and Fair Value by Contractual Maturity) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Held-to-maturity debt securities, Amortized cost:
Due in one year or less	¥ 74,173
Due from one year to five years	332,491
Due from five years to ten years	1,405,140
Due after ten years	2,630,097
Held-to-maturity debt securities, Amortized cost	4,441,901	¥ 3,582,941
Held-to-maturity debt securities, Fair value:
Due in one year or less	74,059
Due from one year to five years	341,814
Due from five years to ten years	1,434,699
Due after ten years	2,602,375
Held-to-maturity debt securities, Fair value	4,452,947	3,620,672
Available-for-sale debt securities, Fair value:
Due in one year or less	12,539,746
Due from one year to five years	10,847,990
Due from five years to ten years	5,316,284
Due after ten years	4,814,483
Available-for-sale debt securities, Fair value	¥ 33,518,503	¥ 32,833,114

Investment Securities (Investme

Investment Securities (Investments by Length and Category in Continuous Loss Position) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)Securities	Mar. 31, 2018JPY (¥)Securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 5,324,873	¥ 6,974,266
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	8,419	25,765
Available-for-sale debt securities, Fair value, 12 months or more	1,988,575	2,127,515
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	48,099	47,162
Available-for-sale debt securities, Fair value, Total	7,313,448	9,101,781
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 56,518	¥ 72,927
Available-for-sale debt securities, Number of securities | Securities	1,079	1,255
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 1,500,382	¥ 633,087
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	11,432	4,814
Held-to-maturity debt securities, Fair value, 12 months or more	1,249,493	621,033
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	23,861	12,255
Held-to-maturity debt securities, Fair value, Total	2,749,875	1,254,120
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 35,293	¥ 17,069
Held-to-maturity debt securities, Number of securities | Securities	601	385
Equity securities, Fair value, Less than 12 months		¥ 448,489
Equity securities, Gross unrealized losses, Less than 12 months		43,482
Equity securities, Fair value, 12 months or more		28
Equity securities, Gross unrealized losses, 12 months or more		6
Equity securities, Fair value, Total		448,517
Equity securities, Gross unrealized losses, Total		¥ 43,488
Equity securities, Number of securities | Securities		116
Japanese National Government and Japanese Government Agency Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 4,149,302	¥ 4,767,893
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	976	2,701
Available-for-sale debt securities, Fair value, 12 months or more	5,599	187,000
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	1	1,142
Available-for-sale debt securities, Fair value, Total	4,154,901	4,954,893
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 977	¥ 3,843
Available-for-sale debt securities, Number of securities | Securities	39	140
Japanese Prefectural and Municipal Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 12,772	¥ 400,705
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	5	453
Available-for-sale debt securities, Fair value, 12 months or more		353,047
Available-for-sale debt securities, Gross unrealized losses, 12 months or more		2,067
Available-for-sale debt securities, Fair value, Total	12,772	753,752
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 5	¥ 2,520
Available-for-sale debt securities, Number of securities | Securities	4	193
Foreign Government and Official Institution Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 397,718	¥ 846,818
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,125	16,955
Available-for-sale debt securities, Fair value, 12 months or more	1,160,671	818,937
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	24,429	27,953
Available-for-sale debt securities, Fair value, Total	1,558,389	1,665,755
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 25,554	¥ 44,908
Available-for-sale debt securities, Number of securities | Securities	179	157
Held-to-maturity debt securities, Fair value, Less than 12 months		¥ 55,837
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months		103
Held-to-maturity debt securities, Fair value, 12 months or more	55,084
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	212
Held-to-maturity debt securities, Fair value, Total	55,084	55,837
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 212	¥ 103
Held-to-maturity debt securities, Number of securities | Securities	10	10
Corporate Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 163,615	¥ 312,993
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	776	856
Available-for-sale debt securities, Fair value, 12 months or more	79,758	74,717
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	46	172
Available-for-sale debt securities, Fair value, Total	243,373	387,710
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 822	¥ 1,028
Available-for-sale debt securities, Number of securities | Securities	92	150
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 316,942	¥ 438,545
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,757	2,644
Available-for-sale debt securities, Fair value, 12 months or more	648,353	623,285
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	19,581	12,919
Available-for-sale debt securities, Fair value, Total	965,295	1,061,830
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 21,338	¥ 15,563
Available-for-sale debt securities, Number of securities | Securities	536	503
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 74,180	¥ 299,286
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	1,199	3,487
Held-to-maturity debt securities, Fair value, 12 months or more	798,165	451,968
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	20,003	11,239
Held-to-maturity debt securities, Fair value, Total	872,345	751,254
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 21,202	¥ 14,726
Held-to-maturity debt securities, Number of securities | Securities	457	332
Commercial Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 42,126	¥ 50,898
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	678	386
Available-for-sale debt securities, Fair value, 12 months or more	57,167	9,067
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	1,673	234
Available-for-sale debt securities, Fair value, Total	99,293	59,965
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 2,351	¥ 620
Available-for-sale debt securities, Number of securities | Securities	104	60
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 3,154	¥ 2,150
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	37	2
Held-to-maturity debt securities, Fair value, 12 months or more	155,011	169,065
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	1,995	1,016
Held-to-maturity debt securities, Fair value, Total	158,165	171,215
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 2,032	¥ 1,018
Held-to-maturity debt securities, Number of securities | Securities	32	32
Asset-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 164,738	¥ 144,073
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	2,553	1,403
Available-for-sale debt securities, Fair value, 12 months or more		5,345
Available-for-sale debt securities, Gross unrealized losses, 12 months or more		12
Available-for-sale debt securities, Fair value, Total	164,738	149,418
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 2,553	¥ 1,415
Available-for-sale debt securities, Number of securities | Securities	87	29
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 1,423,048	¥ 275,814
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	10,196	1,222
Held-to-maturity debt securities, Fair value, 12 months or more	241,233
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	1,651
Held-to-maturity debt securities, Fair value, Total	1,664,281	275,814
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 11,847	¥ 1,222
Held-to-maturity debt securities, Number of securities | Securities	102	11
Other Debt Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 77,660	¥ 12,341
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	549	367
Available-for-sale debt securities, Fair value, 12 months or more	37,027	56,117
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	2,369	2,663
Available-for-sale debt securities, Fair value, Total	114,687	68,458
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 2,918	¥ 3,030
Available-for-sale debt securities, Number of securities | Securities	38	23
Marketable Equity Securities [Member]
Investment Securities [Line Items]
Equity securities, Fair value, Less than 12 months		¥ 448,489
Equity securities, Gross unrealized losses, Less than 12 months		43,482
Equity securities, Fair value, 12 months or more		28
Equity securities, Gross unrealized losses, 12 months or more		6
Equity securities, Fair value, Total		448,517
Equity securities, Gross unrealized losses, Total		¥ 43,488
Equity securities, Number of securities | Securities		116

Investment Securities (Roll-for

Investment Securities (Roll-forward of Credit Loss Component Recognized in Earnings) (Detail) - Corporate Bonds [Member] - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Roll-forward of credit loss component recognized in earnings:
Balance at beginning of fiscal year	¥ 3,499	¥ 4,125	¥ 6,691
Additions: Initial credit impairments	555	111	645
Additions: Subsequent credit impairments	51	3	96
Reductions: Securities sold or matured	(2,344)	(740)	(3,307)
Balance at end of fiscal year	¥ 1,761	¥ 3,499	¥ 4,125

Investment Securities (Net Real

Investment Securities (Net Realized Gains (Losses) on Sales of Equity Securities and Net Unrealized Gains (Losses) on Equity Securities still held) (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2019JPY (¥)
Investments, Debt and Equity Securities [Abstract]
Net losses recognized during the period	¥ (278,746)	[1]
Net losses recognized during the period on equity securities sold during the period	(3,303)
Net unrealized losses recognized during the reporting period still held at the reporting date	¥ (275,443)
[1]	Included in Investment securities gains (losses)-net.

Investment Securities (Measurem

Investment Securities (Measurement Alternative of Equity Securities) (Detail) - Nonmarketable Equity Securities [Member] - Measurement Alternative [Member] ¥ in Millions	Mar. 31, 2019JPY (¥)
Investment Securities [Line Items]
Balance at March 31, 2019	¥ 563,733
Impairment losses	(2,292)	[1]
Downward changes for observable prices		[1],[2]
Upward changes for observable prices	¥ 53,077	[1],[2],[3]
[1]	Included in Investment securities gains (losses)-net.
[2]	Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer.
[3]	The MUFG Group applied measurement alternative upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities.

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Commitments to extend credit to customers with TDRs	¥ 169,819	¥ 172,159
Net gains (losses) on the sales of loans for the fiscal year	20,696	2,976	¥ 19,466
Nonperforming Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Decrease from charge-offs in the allowance for credit losses due to loan disposal activity		¥ 12,200	11,000
Increase from recoveries in the allowance for credit losses due to loan disposal activity	¥ 15,100
Close Watch [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accruing loans contractually past due, in day	90 days	90 days
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings	1-15
Significant sales of loans	¥ 1,769,000	¥ 1,409,000	¥ 833,000
Commercial [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month	1 month
Loans contractually past due before becoming defaulted loans, period	1 month
Commercial [Member] | Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Temporary extensions of maturity dates to nonaccrual loans, in day	90 days
Commercial [Member] | Normal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings	1-9
Commercial [Member] | Close Watch [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings	10-12
Commercial [Member] | Close Watch [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accruing loans contractually past due, in day	90 days
Commercial [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings	13-15
Residential [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month	6 months
Loans contractually past due before becoming defaulted loans, period	6 months
Residential [Member] | Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Temporary extensions of maturity dates to nonaccrual loans, in day	90 days
Card [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month	3 months
Loans contractually past due before becoming defaulted loans, period	1 month
MUAH [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month	3 months
Loans contractually past due before becoming defaulted loans, period	60 days
Krungsri [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month	3 months
Loans contractually past due before becoming defaulted loans, period	6 months
Krungsri [Member] | Special Mention [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Cumulative period of loans for categorizing internal borrower ratings, commencing from the contractual due date in month	1 month
Krungsri [Member] | Substandard or Doubtful or Doubtful of Loss [Member] | Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Cumulative period of loans for categorizing internal borrower ratings, commencing from the contractual due date in month	3 months

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses (Loans by Domicile and Industry of Borrower Segment Classification) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]
Unearned income, unamortized premiums-net and deferred loan fees-net		¥ (304,588)	¥ (294,656)
Total Loans, net	[1]	116,883,941	117,035,895
Loans held for sale		291,794	226,923
Domestic [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		65,156,790	65,696,342
Domestic [Member] | Manufacturing [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		11,153,996	10,876,625
Domestic [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		717,664	781,262
Domestic [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		11,706,419	11,763,769
Domestic [Member] | Services [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		2,653,191	2,689,086
Domestic [Member] | Wholesale and Retail [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		7,643,397	7,989,080
Domestic [Member] | Banks and Other Financial Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	[2]	5,213,020	4,818,364
Domestic [Member] | Communication and Information Services [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		1,510,596	1,551,533
Domestic [Member] | Other Industries [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		8,756,483	8,939,291
Domestic [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		15,802,024	16,287,332
Foreign [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		52,031,739	51,634,209
Total Loans, net		51,678,674	51,339,696
Foreign [Member] | Governments and Official Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		841,695	920,538
Foreign [Member] | Banks and Other Financial Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	[2]	11,641,373	12,851,570
Foreign [Member] | Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		31,951,169	30,591,173
Foreign [Member] | Other [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		¥ 7,597,502	¥ 7,270,928
[1]	The above table includes loans held for sale of ¥226,923 million and ¥291,794 million at March 31, 2018 and 2019, respectively.
[2]	Loans to so-called "non-bank finance companies" are generally included in the "Banks and other financial institutions" category. Non-bank finance companies are primarily engaged in consumer lending, factoring and credit card businesses.

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses (Nonaccrual Status of Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	[1]	¥ 687,670	¥ 746,929
Loans held for sale placed on nonaccrual status		12,702	61
Loans acquired with deteriorated credit quality placed on nonaccrual status		6,284	6,659
Commercial [Member] | Domestic [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		272,777	332,994
Commercial [Member] | Domestic [Member] | Manufacturing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		65,896	77,163
Commercial [Member] | Domestic [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		9,813	10,791
Commercial [Member] | Domestic [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		23,152	33,317
Commercial [Member] | Domestic [Member] | Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		26,188	30,717
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		94,531	108,175
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		898	1,145
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		11,955	13,815
Commercial [Member] | Domestic [Member] | Other Industries [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		25,406	37,549
Commercial [Member] | Domestic [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		14,938	20,322
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		111,002	109,516
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		68,499	69,464
Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		61,419	61,387
MUAH [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		46,549	52,282
Krungsri [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		¥ 127,424	¥ 121,286
[1]	The above table does not include loans held for sale of ¥61 million and ¥12,702 million at March 31, 2018 and 2019, respectively, and loans acquired with deteriorated credit quality of ¥6,659 million and ¥6,284 million at March 31, 2018 and 2019, respectively.

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses (Impaired Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019		Mar. 31, 2018		Mar. 31, 2017	[4]	Mar. 31, 2016
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[1]	¥ 961,616		¥ 1,036,026
Recorded loan balance, Not requiring an allowance for credit losses	[1],[2]	248,175		295,097
Recorded loan balance, Total	[1],[3]	1,209,791		1,331,123
Unpaid principal balance	[1]	1,323,951		1,476,922
Related allowance for credit losses	[1]	391,154		494,326
Accrual TDRs included in impaired loans		617,651	[4]	670,255	[4]	¥ 819,819		¥ 613,844
Impaired loans held for sales		12,702		61
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Accrual TDRs included in impaired loans		497,013		536,748
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		8,136		7,837
Recorded loan balance, Total	[3]	8,136		7,837
Unpaid principal balance		14,990		15,470
Related allowance for credit losses		5,450		4,324
Commercial [Member] | Domestic [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		560,474		626,469
Recorded loan balance, Not requiring an allowance for credit losses	[2]	157,465		188,984
Recorded loan balance, Total	[3]	717,939		815,453
Unpaid principal balance		759,399		875,795
Related allowance for credit losses		227,004		331,851
Commercial [Member] | Domestic [Member] | Manufacturing [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		349,597		361,268
Recorded loan balance, Not requiring an allowance for credit losses	[2]	28,189		36,566
Recorded loan balance, Total	[3]	377,786		397,834
Unpaid principal balance		384,306		408,124
Related allowance for credit losses		92,919		166,098
Commercial [Member] | Domestic [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		8,366		10,936
Recorded loan balance, Not requiring an allowance for credit losses	[2]	5,975		7,172
Recorded loan balance, Total	[3]	14,341		18,108
Unpaid principal balance		14,779		18,490
Related allowance for credit losses		6,574		7,921
Commercial [Member] | Domestic [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		20,848		43,553
Recorded loan balance, Not requiring an allowance for credit losses	[2]	29,961		23,053
Recorded loan balance, Total	[3]	50,809		66,606
Unpaid principal balance		55,943		71,809
Related allowance for credit losses		5,704		10,665
Commercial [Member] | Domestic [Member] | Services [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		30,239		38,097
Recorded loan balance, Not requiring an allowance for credit losses	[2]	13,020		16,600
Recorded loan balance, Total	[3]	43,259		54,697
Unpaid principal balance		46,838		59,335
Related allowance for credit losses		20,059		25,890
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		118,253		128,661
Recorded loan balance, Not requiring an allowance for credit losses	[2]	45,620		49,628
Recorded loan balance, Total	[3]	163,873		178,289
Unpaid principal balance		175,714		189,404
Related allowance for credit losses		84,503		94,832
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		1,012		1,125
Recorded loan balance, Not requiring an allowance for credit losses	[2]	21		26
Recorded loan balance, Total	[3]	1,033		1,151
Unpaid principal balance		1,033		1,151
Related allowance for credit losses		830		972
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		8,794		18,782
Recorded loan balance, Not requiring an allowance for credit losses	[2]	6,929		7,852
Recorded loan balance, Total	[3]	15,723		26,634
Unpaid principal balance		16,587		28,082
Related allowance for credit losses		6,817		16,041
Commercial [Member] | Domestic [Member] | Other Industries [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		13,772		12,978
Recorded loan balance, Not requiring an allowance for credit losses	[2]	17,989		34,282
Recorded loan balance, Total	[3]	31,761		47,260
Unpaid principal balance		38,342		67,525
Related allowance for credit losses		6,874		5,350
Commercial [Member] | Domestic [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		9,593		11,069
Recorded loan balance, Not requiring an allowance for credit losses	[2]	9,761		13,805
Recorded loan balance, Total	[3]	19,354		24,874
Unpaid principal balance		25,857		31,875
Related allowance for credit losses		2,724		4,082
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		127,521		122,243
Recorded loan balance, Not requiring an allowance for credit losses	[2]	34,484		40,249
Recorded loan balance, Total	[3]	162,005		162,492
Unpaid principal balance		183,133		190,518
Related allowance for credit losses		85,966		82,855
Residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	97,176		105,089
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	6,495		6,261
Recorded loan balance, Total	[3],[5]	103,671		111,350
Unpaid principal balance	[5]	120,526		134,777
Related allowance for credit losses	[5]	14,357		16,928
Accrual TDRs included in impaired loans		34,449		40,734
Card [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	64,691		66,964
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	330		388
Recorded loan balance, Total	[3],[5]	65,021		67,352
Unpaid principal balance	[5]	72,226		74,840
Related allowance for credit losses	[5]	21,829		21,223
Accrual TDRs included in impaired loans		26,183		28,541
MUAH [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	46,552		48,895
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	23,208		33,650
Recorded loan balance, Total	[3],[5]	69,760		82,545
Unpaid principal balance	[5]	83,300		94,565
Related allowance for credit losses	[5]	8,294		7,743
Accrual TDRs included in impaired loans		33,155		39,333
Krungsri [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	57,066		58,529
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	26,193		25,565
Recorded loan balance, Total	[3],[5]	83,259		84,094
Unpaid principal balance	[5]	90,377		90,957
Related allowance for credit losses	[5]	28,254		29,402
Accrual TDRs included in impaired loans		¥ 26,851		¥ 24,899
[1]	In addition to impaired loans presented in the above table, there were impaired loans held for sale of ¥61 million and ¥12,702 million at March 31, 2018 and 2019, respectively.
[2]	These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans' original effective interest rate, loans' observable market price, or the fair value of the collateral if the loan is a collateral-dependent loan.
[3]	Included in impaired loans at March 31, 2018 and 2019 are accrual TDRs as follows: ¥536,748 million and ¥497,013 million-Commercial; ¥40,734 million and ¥34,449 million-Residential; ¥28,541 million and ¥26,183 million-Card; ¥39,333 million and ¥33,155 million-MUFG Americas Holdings; and ¥24,899 million and ¥26,851 million-Krungsri, respectively.
[4]	For the fiscal year ended March 31, 2017, lease receivables of ¥875 million and ¥74 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,065 million and ¥389 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2017. For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019.
[5]	Impaired Loans for Residential, Card, MUAH and Krungsri segments in the above table include loans acquired with deteriorated credit quality.

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses (Average Recorded Loan Balance and Recognized Interest Income on Impaired Loans by Class) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	¥ 1,262,339	¥ 1,484,095	¥ 1,792,059
Recognized interest income	26,213	23,625	27,911
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	7,814	8,591	9,974
Recognized interest income	182	492	432
Commercial [Member] | Domestic [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	766,847	918,093	1,137,501
Recognized interest income	12,383	9,441	14,116
Commercial [Member] | Domestic [Member] | Manufacturing [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	387,725	472,081	601,256
Recognized interest income	6,057	3,787	5,845
Commercial [Member] | Domestic [Member] | Construction [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	15,721	19,465	26,684
Recognized interest income	291	281	434
Commercial [Member] | Domestic [Member] | Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	57,850	74,087	96,229
Recognized interest income	1,069	1,146	1,593
Commercial [Member] | Domestic [Member] | Services [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	48,945	59,916	81,967
Recognized interest income	1,044	794	1,236
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	171,687	186,356	238,798
Recognized interest income	2,848	2,347	3,466
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	1,330	1,729	2,272
Recognized interest income	8	8	11
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	22,478	25,461	27,531
Recognized interest income	491	388	570
Commercial [Member] | Domestic [Member] | Other Industries [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	39,178	50,377	24,709
Recognized interest income	234	215	397
Commercial [Member] | Domestic [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	21,933	28,621	38,055
Recognized interest income	341	475	564
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	159,999	209,297	291,612
Recognized interest income	3,127	4,244	5,132
Residential [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	107,165	119,409	133,876
Recognized interest income	1,620	1,563	1,883
Card [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	66,187	69,831	75,809
Recognized interest income	1,614	1,993	2,483
MUAH [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	71,162	83,504	91,690
Recognized interest income	2,292	1,993	1,664
Krungsri [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	83,165	75,370	51,597
Recognized interest income	¥ 4,995	¥ 3,899	¥ 2,201

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses (Roll-forward of Accrual TDRs and Other Impaired Loans) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019		Mar. 31, 2018		Mar. 31, 2017
Accrual TDRs:
Balance at beginning of fiscal year		¥ 670,255	[1]	¥ 819,819	[1]	¥ 613,844
Additions (new accrual TDR status)	[1]	71,033		144,368		492,269
Transfers to other impaired loans (including nonaccrual TDRs)		(19,053)		(25,122)		(40,182)
Loans sold		(26)		(39,378)		(1,637)
Principal payments and other		(104,558)		(229,432)		(244,475)
Balance at end of fiscal year	[1]	617,651		670,255		819,819
Other impaired loans (including nonaccrual TDRs):
Balance at beginning of fiscal year		660,868	[1]	896,031	[1]	1,111,306
Additions (new other impaired loans (including nonaccrual TDRs) status)	[1],[2]	222,003		281,275		541,789
Charge-off		(55,309)		(98,355)		(106,097)
Transfers to accrual TDRs		(22,110)		(43,858)		(333,478)
Loans sold		(26,022)		(31,581)		(44,984)
Principal payments and other		(187,290)		(342,644)		(272,505)
Balance at end of fiscal year	[1]	592,140		660,868		896,031
Card [Member]
Accrual TDRs:
Balance at beginning of fiscal year		28,541
Balance at end of fiscal year		26,183		28,541
Other impaired loans (including nonaccrual TDRs):
Additions of nonaccrual TDRs		13,493		12,002		11,699
MUAH [Member]
Accrual TDRs:
Balance at beginning of fiscal year		39,333
Balance at end of fiscal year		33,155		39,333
Other impaired loans (including nonaccrual TDRs):
Additions of nonaccrual TDRs		12,738		12,799		25,023
Krungsri [Member]
Accrual TDRs:
Balance at beginning of fiscal year		24,899
Balance at end of fiscal year		26,851		24,899
Lease receivables reported as accrual TDRs but excluded from "Additions" as impaired loans		2,947		1,809		875
Lease receivables excluded from accrual TDRs as impaired loans		2,088		4,282		4,065
Other impaired loans (including nonaccrual TDRs):
Lease receivables reported as nonaccrual TDRs but excluded from "Additions" as impaired loans		5,060		113		74
Lease receivables excluded from other impaired loans		3,361		1,286		389
Additions of nonaccrual TDRs		¥ 10,519		¥ 12,280		¥ 7,471
[1]	For the fiscal year ended March 31, 2017, lease receivables of ¥875 million and ¥74 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,065 million and ¥389 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2017. For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019.
[2]	Included in the additions of other impaired loans for the fiscal years ended March 31, 2017, 2018 and 2019 are nonaccrual TDRs as follows: ¥11,699 million, ¥12,002 million and ¥13,493 million-Card; ¥25,023 million, ¥12,799 million and ¥12,738 million-MUFG Americas Holdings; and ¥7,471 million, ¥12,280 million and ¥10,519 million-Krungsri, respectively.

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses (Troubled Debt Restructurings by Class) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment		¥ 113,728	¥ 187,694	¥ 538,017
Troubled debt restructurings, Post-modification outstanding recorded investment		112,818	183,371	537,411
Troubled debt restructurings that subsequently defaulted, Recorded Investment		23,081	15,771	30,355
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	50		1,030
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	50		1,030
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]
Commercial [Member] | Domestic [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	36,693	70,380	377,563
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	36,693	69,021	377,563
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	11,002	4,067	4,587
Commercial [Member] | Domestic [Member] | Manufacturing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	11,654	35,954	335,347
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	11,654	35,954	335,347
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	312	839	1,373
Commercial [Member] | Domestic [Member] | Construction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	703	1,020	1,377
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	703	1,020	1,377
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	89		11
Commercial [Member] | Domestic [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	948	1,269	7,457
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	948	1,269	7,457
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]		10	38
Commercial [Member] | Domestic [Member] | Services [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	2,141	4,139	5,268
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	2,141	4,139	5,268
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	473	822	217
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	19,315	16,280	22,868
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	19,315	14,921	22,868
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	1,713	2,231	2,530
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]		246
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]		246
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	268	9,643	2,405
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	268	9,643	2,405
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	8,365	140	385
Commercial [Member] | Domestic [Member] | Other Industries [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	472	761	1,493
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	472	761	1,493
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	50
Commercial [Member] | Domestic [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	1,192	1,068	1,348
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	1,192	1,068	1,348
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]		25	33
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	5,692	25,522	58,178
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	5,692	25,522	58,178
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]			11,268
Residential [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	7,379	9,763	13,092
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	7,379	9,763	13,092
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	362	159	231
Card [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	19,685	17,436	17,256
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	18,837	16,912	16,759
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	3,442	4,191	3,661
MUAH [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	19,837	40,578	38,558
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	19,837	38,224	38,449
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	349	2,565	6,624
Krungsri [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	24,392	24,015	32,340
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	24,330	23,929	32,340
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	¥ 7,926	¥ 4,789	¥ 3,984
[1]	For the fiscal year ended March 31, 2017, extension of the stated maturity date of loans was the primary concession type in the Residential segment, reduction in the stated rate was the primary concession type in the Commercial and Card segments and payment deferrals were the primary concession type in the MUFG Americas Holdings and Krungsri segments. For the fiscal year ended March 31, 2018, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and payment deferrals were the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment.
[2]	TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans.
[3]	TDRs for the Card, MUFG Americas Holdings and Krungsri segments include accrual and nonaccrual loans.

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses (Outstanding Recorded Investment Balances of Troubled Debt Restructurings by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		¥ 707,591	¥ 764,243
Commercial [Member] | Domestic [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	445,312	482,566
Commercial [Member] | Domestic [Member] | Manufacturing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	311,890	320,702
Commercial [Member] | Domestic [Member] | Construction [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	4,591	7,362
Commercial [Member] | Domestic [Member] | Real Estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	27,657	33,289
Commercial [Member] | Domestic [Member] | Services [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	17,135	23,987
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	69,350	70,119
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	135	6
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	3,780	12,837
Commercial [Member] | Domestic [Member] | Other Industries [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	6,357	9,712
Commercial [Member] | Domestic [Member] | Consumer [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	4,417	4,552
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	51,701	54,182
Residential [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	34,449	40,734
Card [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[2]	65,021	67,352
MUAH [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[2]	48,128	65,373
Krungsri [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[2]	62,980	54,036
Nonaccrual [Member] | Card [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		38,838	38,811
Nonaccrual [Member] | MUAH [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		14,973	26,040
Nonaccrual [Member] | Krungsri [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		¥ 31,069	¥ 24,855
[1]	TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans.
[2]	TDRs for the Card, MUFG Americas Holdings and Krungsri segments include accrual and nonaccrual loans. Included in the outstanding recorded investment balances as of March 31, 2018 and 2019 are nonaccrual TDRs as follows: ¥38,811 million and ¥38,838 million-Card; ¥26,040 million and ¥14,973 million-MUFG Americas Holdings; and ¥24,855 million and ¥31,069 million-Krungsri, respectively.

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses (Credit Quality Indicators of Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	¥ 86,971,280	¥ 87,766,515
Commercial [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		84,821,880	85,111,432
Commercial [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,815,762	2,271,789
Commercial [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		333,638	383,294
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	26,245	27,325
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		11,622	12,035
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		10,833	11,728
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		3,790	3,562
Commercial [Member] | Domestic [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	50,851,811	51,012,654
Commercial [Member] | Domestic [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		49,391,991	49,050,274
Commercial [Member] | Domestic [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,242,075	1,690,924
Commercial [Member] | Domestic [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		217,745	271,456
Commercial [Member] | Domestic [Member] | Manufacturing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	11,147,363	10,869,889
Commercial [Member] | Domestic [Member] | Manufacturing [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		10,819,594	10,215,497
Commercial [Member] | Domestic [Member] | Manufacturing [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		279,801	596,662
Commercial [Member] | Domestic [Member] | Manufacturing [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		47,968	57,730
Commercial [Member] | Domestic [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	717,245	780,721
Commercial [Member] | Domestic [Member] | Construction [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		672,152	727,932
Commercial [Member] | Domestic [Member] | Construction [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		37,236	43,673
Commercial [Member] | Domestic [Member] | Construction [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		7,857	9,116
Commercial [Member] | Domestic [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	11,648,919	11,691,914
Commercial [Member] | Domestic [Member] | Real Estate [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		11,403,613	11,379,291
Commercial [Member] | Domestic [Member] | Real Estate [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		222,791	279,931
Commercial [Member] | Domestic [Member] | Real Estate [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		22,515	32,692
Commercial [Member] | Domestic [Member] | Services [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	2,631,226	2,667,354
Commercial [Member] | Domestic [Member] | Services [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		2,436,489	2,467,540
Commercial [Member] | Domestic [Member] | Services [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		174,784	175,733
Commercial [Member] | Domestic [Member] | Services [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		19,953	24,081
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	7,638,786	7,970,959
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		7,240,801	7,518,383
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		329,249	374,706
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		68,736	77,870
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	5,208,441	4,812,349
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		5,199,889	4,800,281
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		7,654	10,923
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		898	1,145
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	1,510,366	1,551,204
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,465,652	1,491,093
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		34,542	48,153
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		10,172	11,958
Commercial [Member] | Domestic [Member] | Other Industries [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	8,754,992	8,937,934
Commercial [Member] | Domestic [Member] | Other Industries [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		8,610,464	8,780,517
Commercial [Member] | Domestic [Member] | Other Industries [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		119,581	120,466
Commercial [Member] | Domestic [Member] | Other Industries [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		24,947	36,951
Commercial [Member] | Domestic [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	1,594,473	1,730,330
Commercial [Member] | Domestic [Member] | Consumer [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,543,337	1,669,740
Commercial [Member] | Domestic [Member] | Consumer [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		36,437	40,677
Commercial [Member] | Domestic [Member] | Consumer [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		14,699	19,913
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	36,093,224	36,726,536
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		35,418,267	36,049,123
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		562,854	569,137
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		112,103	108,276
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	13,728,084	14,080,236
Residential [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		13,661,794	14,012,978
Residential [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		66,290	67,258
Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	578,582	589,815
Card [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		516,983	528,108
Card [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		61,599	61,707
MUAH [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1],[2]	9,607,563	9,060,459
FDIC covered loans acquired with deteriorated credit quality and small business loans which are not individually rated		689	953
MUAH [Member] | Credit Quality Based on the Number of Delinquencies [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		4,752,021	4,360,445
MUAH [Member] | Credit Quality Based on the Number of Delinquencies [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		15,540	14,238
MUAH [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		4,699,698	4,509,044
MUAH [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		51,948	59,890
MUAH [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		88,356	116,842
Krungsri [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	6,010,537	5,605,650
Krungsri [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		5,682,245	5,284,018
Krungsri [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		199,070	198,526
Krungsri [Member] | Substandard or Doubtful or Doubtful of Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		¥ 129,222	¥ 123,106
[1]	Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.
[2]	Total loans of MUFG Americas Holdings do not include FDIC covered loans which are not individually rated totaling ¥953 million and ¥689 million as of March 31, 2018 and 2019, respectively. The MUFG Group will be reimbursed for a substantial portion of any future losses on FDIC covered loans under the terms of the FDIC loss share agreements.

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses (Ages of Past Due Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		¥ 472,758	¥ 490,720
Loans, current		116,369,874	116,545,125
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	116,842,632	117,035,845
Loans, greater than 90 days past due and accruing		16,007	19,079
1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		257,330	262,572
Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		215,428	228,148
Commercial [Member] | Domestic [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		42,199	57,203
Loans, current		50,809,612	50,955,451
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	50,851,811	51,012,654
Loans, greater than 90 days past due and accruing		6,900	6,419
Commercial [Member] | Domestic [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		11,551	13,290
Commercial [Member] | Domestic [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		30,648	43,913
Commercial [Member] | Domestic [Member] | Manufacturing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		4,633	2,795
Loans, current		11,142,730	10,867,094
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	11,147,363	10,869,889
Commercial [Member] | Domestic [Member] | Manufacturing [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		1,597	1,495
Commercial [Member] | Domestic [Member] | Manufacturing [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		3,036	1,300
Commercial [Member] | Domestic [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		278	796
Loans, current		716,967	779,925
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	717,245	780,721
Loans, greater than 90 days past due and accruing		1
Commercial [Member] | Domestic [Member] | Construction [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		218	359
Commercial [Member] | Domestic [Member] | Construction [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		60	437
Commercial [Member] | Domestic [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		6,290	5,315
Loans, current		11,642,629	11,686,599
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	11,648,919	11,691,914
Loans, greater than 90 days past due and accruing		2,524	1,633
Commercial [Member] | Domestic [Member] | Real Estate [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		2,034	2,090
Commercial [Member] | Domestic [Member] | Real Estate [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		4,256	3,225
Commercial [Member] | Domestic [Member] | Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		1,347	1,645
Loans, current		2,629,879	2,665,709
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	2,631,226	2,667,354
Loans, greater than 90 days past due and accruing		1	26
Commercial [Member] | Domestic [Member] | Services [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		778	1,025
Commercial [Member] | Domestic [Member] | Services [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		569	620
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		5,181	8,084
Loans, current		7,633,605	7,962,875
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	7,638,786	7,970,959
Loans, greater than 90 days past due and accruing		62	1,349
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		2,791	3,886
Commercial [Member] | Domestic [Member] | Wholesale and Retail [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		2,390	4,198
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		21	21
Loans, current		5,208,420	4,812,328
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	5,208,441	4,812,349
Commercial [Member] | Domestic [Member] | Banks and Other Financial Institutions [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		21	21
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		1,169	985
Loans, current		1,509,197	1,550,219
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	1,510,366	1,551,204
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		411	657
Commercial [Member] | Domestic [Member] | Communication and Information Services [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		758	328
Commercial [Member] | Domestic [Member] | Other Industries [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		13,402	28,566
Loans, current		8,741,590	8,909,368
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	8,754,992	8,937,934
Commercial [Member] | Domestic [Member] | Other Industries [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		365	251
Commercial [Member] | Domestic [Member] | Other Industries [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		13,037	28,315
Commercial [Member] | Domestic [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		9,878	8,996
Loans, current		1,584,595	1,721,334
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	1,594,473	1,730,330
Loans, greater than 90 days past due and accruing		4,312	3,411
Commercial [Member] | Domestic [Member] | Consumer [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		3,357	3,527
Commercial [Member] | Domestic [Member] | Consumer [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		6,521	5,469
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		30,874	32,167
Loans, current		36,062,350	36,694,369
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	36,093,224	36,726,536
Loans, greater than 90 days past due and accruing		236	1,083
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		10,881	12,512
Commercial [Member] | Foreign-excluding MUAH and Krungsri [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		19,993	19,655
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		79,301	97,472
Loans, current		13,641,449	13,974,118
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	13,720,750	14,071,590
Loans, greater than 90 days past due and accruing		6,584	10,806
Residential [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		62,686	78,073
Residential [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		16,615	19,399
Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		47,771	51,105
Loans, current		527,421	528,284
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	575,192	579,389
Card [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		17,203	18,887
Card [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		30,568	32,218
MUAH [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		39,523	36,793
Loans, current		9,557,501	9,009,426
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	9,597,024	9,046,219
Loans, greater than 90 days past due and accruing		2,287	771
MUAH [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		28,696	23,145
MUAH [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		10,827	13,648
Krungsri [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		233,090	215,980
Loans, current		5,771,541	5,383,477
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	6,004,631	5,599,457
Krungsri [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		126,313	116,665
Krungsri [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		¥ 106,777	¥ 99,315
[1]	Total loans in the above table do not include loans held for sale and loans acquired with deteriorated credit quality and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses (Changes in Allowance for Credit Losses by Portfolio Segment) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		¥ 764,124	¥ 1,182,188		¥ 1,111,130
Provision for (reversal of) credit losses		34,330	(240,847)	[1]	253,688	[1]
Charge-offs		174,041	232,109		213,758
Recoveries		44,117	51,110		43,949
Net charge-offs		129,924	180,999		169,809
Others	[2]	(10,346)	3,782		(12,821)
Balance at end of fiscal year		658,184	764,124		1,182,188
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		491,098	900,686		816,559
Provision for (reversal of) credit losses		(43,850)	(297,401)		177,295
Charge-offs		76,664	134,807		108,262
Recoveries		17,565	24,913		21,124
Net charge-offs		59,099	109,894		87,138
Others	[2]	1,466	(2,293)		(6,030)
Balance at end of fiscal year		389,615	491,098		900,686
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		42,546	67,336		58,598
Provision for (reversal of) credit losses		(4,480)	(22,291)		12,224
Charge-offs		274	3,838		5,339
Recoveries		834	1,339		1,853
Net charge-offs		(560)	2,499		3,486
Balance at end of fiscal year		38,626	42,546		67,336
Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		32,119	30,165		31,187
Provision for (reversal of) credit losses		23,809	23,422		13,289
Charge-offs		24,310	22,696		16,309
Recoveries		932	1,228		1,998
Net charge-offs		23,378	21,468		14,311
Balance at end of fiscal year		32,550	32,119		30,165
MUAH [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		53,765	73,733		108,454
Provision for (reversal of) credit losses		9,277	(9,309)		(62)
Charge-offs		13,224	14,701		32,074
Recoveries		3,733	6,140		2,916
Net charge-offs		9,491	8,561		29,158
Others	[2]	(970)	(2,098)		(5,501)
Balance at end of fiscal year		52,581	53,765		73,733
Krungsri [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		144,596	110,268		96,332
Provision for (reversal of) credit losses		49,574	64,732		50,942
Charge-offs		59,569	56,067		51,774
Recoveries		21,053	17,490		16,058
Net charge-offs		38,516	38,577		35,716
Others	[2]	(10,842)	8,173		(1,290)
Balance at end of fiscal year		¥ 144,812	¥ 144,596		¥ 110,268
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.
[2]	Others are principally comprised of gains or losses from foreign exchange translation.

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses (Allowance for Credit Losses and Recorded Investment in Loans by Portfolio Segment) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019		Mar. 31, 2018		Mar. 31, 2017	Mar. 31, 2016
Allowance for credit losses:
Individually evaluated for impairment		¥ 385,522		¥ 489,718
Collectively evaluated for impairment		258,298		260,709
Loans acquired with deteriorated credit quality		14,364	[1]	13,697	[1]	¥ 14,523
Total		658,184		764,124		1,182,188	¥ 1,111,130
Loans:
Individually evaluated for impairment		1,200,663		1,321,738
Collectively evaluated for impairment		115,641,969		115,714,112
Loans acquired with deteriorated credit quality		54,103	[1]	67,778	[1]	91,176
Total	[2]	116,896,735		117,103,628
Commercial [Member]
Allowance for credit losses:
Individually evaluated for impairment		312,970		414,706
Collectively evaluated for impairment		63,366		64,375
Loans acquired with deteriorated credit quality	[1]	13,279		12,017
Total		389,615		491,098		900,686	816,559
Loans:
Individually evaluated for impairment		879,944		977,945
Collectively evaluated for impairment		86,065,091		86,761,245
Loans acquired with deteriorated credit quality	[1]	26,245		27,325
Total	[2]	86,971,280		87,766,515
Residential [Member]
Allowance for credit losses:
Individually evaluated for impairment		14,175		16,644
Collectively evaluated for impairment		23,413		24,718
Loans acquired with deteriorated credit quality	[1]	1,038		1,184
Total		38,626		42,546		67,336	58,598
Loans:
Individually evaluated for impairment		102,948		110,197
Collectively evaluated for impairment		13,617,802		13,961,393
Loans acquired with deteriorated credit quality	[1]	7,334		8,646
Total	[2]	13,728,084		14,080,236
Card [Member]
Allowance for credit losses:
Individually evaluated for impairment		21,829		21,223
Collectively evaluated for impairment		10,708		10,884
Loans acquired with deteriorated credit quality	[1]	13		12
Total		32,550		32,119		30,165	31,187
Loans:
Individually evaluated for impairment		64,752		66,957
Collectively evaluated for impairment		510,440		512,432
Loans acquired with deteriorated credit quality	[1]	3,390		10,426
Total	[2]	578,582		589,815
MUAH [Member]
Allowance for credit losses:
Individually evaluated for impairment		8,294		7,743
Collectively evaluated for impairment		44,282		45,571
Loans acquired with deteriorated credit quality	[1]	5		451
Total		52,581		53,765		73,733	108,454
Loans:
Individually evaluated for impairment		69,760		82,545
Collectively evaluated for impairment		9,527,264		8,963,679
Loans acquired with deteriorated credit quality	[1]	11,228		15,188
Total	[2]	9,608,252		9,061,412
Krungsri [Member]
Allowance for credit losses:
Individually evaluated for impairment		28,254		29,402
Collectively evaluated for impairment		116,529		115,161
Loans acquired with deteriorated credit quality	[1]	29		33
Total		144,812		144,596		¥ 110,268	¥ 96,332
Loans:
Individually evaluated for impairment		83,259		84,094
Collectively evaluated for impairment		5,921,372		5,515,363
Loans acquired with deteriorated credit quality	[1]	5,906		6,193
Total	[2]	¥ 6,010,537		¥ 5,605,650
[1]	Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment.
[2]	Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.

Loans and Allowance for Cred_15

Loans and Allowance for Credit Losses (Loans Acquired with Deteriorated Credit Quality) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019		Mar. 31, 2018
Loans acquired during the fiscal year:
Contractually required payments receivable at acquisition		¥ 3,880		¥ 537
Cash flows expected to be collected at acquisition		1,449		197
Fair value of loans at acquisition		1,449		197
Accretable yield for loans within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality:
Balance at beginning of fiscal year		29,672		40,917
Additions
Accretion		(7,178)		(14,067)
Disposals				(11)
Reclassifications from (to) nonaccretable difference		896		3,267
Foreign currency translation adjustments		(230)		(434)
Balance at end of fiscal year		23,160		29,672
Loans within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality:
Outstanding balance at beginning of fiscal year		180,011		223,695
Outstanding balance at end of fiscal year		161,525		180,011
Carrying amount at beginning of fiscal year		67,778	[1]	91,176
Carrying amount at end of fiscal year	[1]	54,103		67,778
Nonaccruing loans within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality:
Carrying amount at acquisition date during fiscal year		1,449		197
Carrying amount at end of fiscal year		6,284		6,659
Allowance for credit losses within the scope of the guidance on loans and debt securities acquired with deteriorated credit quality:
Balance of allowance for credit losses at beginning of fiscal year		13,697	[1]	14,523
Additional provisions during fiscal year		1,744		2,285
Reductions of allowance during fiscal year		401		732
Balance of allowance for credit losses at end of fiscal year	[1]	¥ 14,364		¥ 13,697
[1]	Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment.

Loans and Allowance for Cred_16

Loans and Allowance for Credit Losses (Components of Investment in Direct Financing Leases) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Financing leases, net investment in direct financing leases:
Minimum lease payments receivable	¥ 1,922,339	¥ 1,862,664
Estimated residual values of leased property	27,468	31,650
Less-unearned income	(299,283)	(279,081)
Net investment in direct financing leases	¥ 1,650,524	¥ 1,615,233

Loans and Allowance for Cred_17

Loans and Allowance for Credit Losses (Future Minimum Lease Payment Receivables under Noncancelable Leasing Agreements) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Future minimum lease payment receivables under noncancelable lease:
Fiscal year ending March 31, 2020	¥ 510,439
Fiscal year ending March 31, 2021	425,023
Fiscal year ending March 31, 2022	353,355
Fiscal year ending March 31, 2023	240,609
Fiscal year ending March 31, 2024	171,286
Fiscal year ending March 31, 2025 and thereafter	221,627
Total minimum lease payment receivables	¥ 1,922,339

Premises and Equipment (Narrati

Premises and Equipment (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Property, Plant and Equipment [Line Items]
Capitalized leases, principally related to data processing equipment	¥ 34,141	¥ 31,458
Accumulated depreciation on capitalized leases	19,946	17,298
Long-term debt	27,990,543	27,069,556
Impairment losses for long-lived assets	31,345	39,358	¥ 5,964
Impairment losses recognized for real estate held for sale	411	213	¥ 901
BK [Member]
Property, Plant and Equipment [Line Items]
Impairment losses for long-lived assets		34,016
BK [Member] | Buildings and Land [Member] | Obligations under Sale-and-leaseback Transactions [Member]
Property, Plant and Equipment [Line Items]
Long-term debt	40,732	¥ 41,892
Consumer Finance Subsidiary [Member]
Property, Plant and Equipment [Line Items]
Impairment losses for long-lived assets	¥ 21,096

Premises and Equipment (Compone

Premises and Equipment (Components of Premises and Equipment) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Premises and equipment	¥ 2,180,229	¥ 2,200,873
Less accumulated depreciation	1,206,629	1,187,285
Premises and equipment-net	973,600	1,013,588
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	362,742	370,669
Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	829,606	739,665
Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	648,598	659,699
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	305,281	311,645
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	¥ 34,002	¥ 119,195

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Narrative) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Goodwill and Other Intangible Assets [Line Items]
Impairment of goodwill	[1]				¥ 6,638
Intangible assets subject to amortization acquired		¥ 262,700	¥ 242,017
Intangible assets not subject to amortization acquired		11,172	28
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value		118,108	21,900	[1]	5,803	[1]
Impairment losses for long-lived assets		31,345	39,358		5,964
Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Intangible assets subject to amortization acquired		¥ 262,408	¥ 239,460
Weighted average amortization periods of intangible assets subject to amortization, years		6 years	5 years
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value		¥ 28,494
Customer Relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Intangible assets subject to amortization acquired			¥ 2,200
Weighted average amortization periods of intangible assets subject to amortization, years			22 years
System Software under Development [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value		87,596
Consumer Finance Subsidiary [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for long-lived assets		21,096
Business Segment [Member] | Customer Business [Member] | Trust Assets Business Group [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment of goodwill					¥ 6,638
Business Segment [Member] | Customer Business [Member] | Trust Assets Business Group [Member] | Customer Relationships [Member] | Foreign [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value			¥ 11,121
Business Segment [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member] | Consumer Finance Subsidiary [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for long-lived assets		21,096
Business Segment [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member] | Consumer Finance Subsidiary [Member] | Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value		¥ 137,186
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Movement in Carrying Amount of Goodwill by Business Segment) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Goodwill [Line Items]
Foreign currency translation adjustments and other	¥ (7,443)	¥ (8,809)
Goodwill	626,009	633,452	¥ 642,261	[1]
Accumulated impairment losses	(192,118)	(192,118)	(192,118)	[1]
Goodwill, Net, at end of fiscal year	433,891	441,334	450,143
Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri [Member]
Goodwill [Line Items]
Goodwill, Fully impaired before April 1, 2017	1,900,019
Business Segment [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member]
Goodwill [Line Items]
Foreign currency translation adjustments and other	(7,206)	(8,399)
Goodwill	596,222	603,428	611,827	[1]
Accumulated impairment losses	(177,750)	(177,750)	(177,750)	[1]
Goodwill, Net, at end of fiscal year	418,472	425,678	434,077
Business Segment [Member] | Customer Business [Member] | Asset Management & Investor Services Business Group [Member]
Goodwill [Line Items]
Foreign currency translation adjustments and other	(237)	(410)
Goodwill	27,487	27,724	28,134	[1]
Accumulated impairment losses	(14,368)	(14,368)	(14,368)	[1]
Goodwill, Net, at end of fiscal year	13,119	13,356	13,766
Business Segment [Member] | Global Markets Business Group [Member]
Goodwill [Line Items]
Goodwill	2,300	2,300	2,300	[1]
Goodwill, Net, at end of fiscal year	¥ 2,300	¥ 2,300	¥ 2,300
[1]	Effective April 1, 2018, the MUFG Group reorganized its business groups. Goodwill originally recognized for Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri was ¥1,900,019 million, which has been fully impaired before April 1, 2017. As these impairment losses recorded in past before the reorganization of the segment and are irrelevant to the annual impairment test under the new segment, the accumulated impaired loss is not allocated to new business segments after the reorganization of business group.

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Carrying Amount of Other Intangible Assets by Major Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Intangible assets subject to amortization:
Gross carrying amount		¥ 3,304,950	¥ 3,193,199
Accumulated amortization		2,403,447	2,197,572
Net carrying amount		901,503	995,627
Intangible assets not subject to amortization:
Net carrying amount, Other	[1]	25,693	15,492
Total intangible assets, Net carrying amount		927,196	1,011,119
Mortgage Servicing Rights [Member]
Intangible assets not subject to amortization:
Net carrying amount, Other		17,431	7,268
Software [Member]
Intangible assets subject to amortization:
Gross carrying amount		2,703,413	2,585,161
Accumulated amortization		2,029,775	1,852,333
Net carrying amount		673,638	732,828
Core Deposit Intangibles [Member]
Intangible assets subject to amortization:
Gross carrying amount		126,796	128,679
Accumulated amortization		88,643	83,382
Net carrying amount		38,153	45,297
Customer Relationships [Member]
Intangible assets subject to amortization:
Gross carrying amount		387,936	391,832
Accumulated amortization		246,526	227,079
Net carrying amount		141,410	164,753
Trade Names [Member]
Intangible assets subject to amortization:
Gross carrying amount		77,204	77,821
Accumulated amortization		34,283	30,801
Net carrying amount		42,921	47,020
Other [Member]
Intangible assets subject to amortization:
Gross carrying amount		9,601	9,706
Accumulated amortization		4,220	3,977
Net carrying amount		¥ 5,381	¥ 5,729
[1]	Intangible assets not subject to amortization includes ¥7,268 million and ¥17,431 million of mortgage servicing rights accounted for at fair value at March 31, 2018 and 2019, respectively.

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Estimated Aggregate Amortization Expense for Intangible Assets for Next Five Fiscal Years) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Estimated aggregate amortization expense for intangible assets for the next five fiscal years:
Fiscal year ending March 31, 2020	¥ 230,962
Fiscal year ending March 31, 2021	195,126
Fiscal year ending March 31, 2022	160,504
Fiscal year ending March 31, 2023	120,350
Fiscal year ending March 31, 2024	¥ 83,523

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Detail) - JPY (¥) ¥ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income Taxes [Line Items]
Approximate effective statutory rate of corporate income tax			30.60%	30.60%	31.50%
Federal corporate income tax rate		35.00%
Approximate undistributed earnings of foreign subsidiaries	¥ 38,358		¥ 48,103	¥ 38,358
Operating loss carryforwards			527,882
Tax credit carryforwards			52,546
Total amounts of unrecognized tax benefits that, if recognized, would affect the effective tax rate	¥ 6,518		14,092	¥ 6,518	¥ 1,443
Maximum [Member]
Income Taxes [Line Items]
Reasonably possible decrease in unrecognized tax benefits			¥ 2,600
Revisions to Local Tax Law Promulgated by Tokyo Metropolitan Government Bureau of Taxation [Member]
Income Taxes [Line Items]
Approximate effective statutory rate of corporate income tax				30.60%	31.50%
Change in income tax expense (benefit) resulting from change in tax laws					¥ (26,820)
Due to Commencement of Certain Subsidiary's Application of Consolidated Corporate-Tax System [Member]
Income Taxes [Line Items]
Addition (release) of valuation allowance				¥ 53,360
Requirements of Japanese Tax Law for Domestic Company to Exclude from Taxable Income Dividend Received from Foreign Company [Member]
Income Taxes [Line Items]
Percentage of dividend that can be excluded from the taxable income			95.00%
Percentage of taxable dividends over the amount received from certain foreign subsidiaries			5.00%
Requirements of Japanese Tax Law for Domestic Company to Exclude from Taxable Income Dividend Received from Foreign Company [Member] | Minimum [Member]
Income Taxes [Line Items]
Percentage of outstanding shares held in a foreign company who declared a dividend			25.00%
Continuous holding period on the date the dividend is declared by a foreign company			6 months
Tax Cuts & Jobs Act [Member]
Income Taxes [Line Items]
Federal corporate income tax rate	21.00%
Change in income tax expense (benefit) resulting from change in tax laws				¥ 10,395

Income Taxes (Income before Inc

Income Taxes (Income before Income Tax Expense by Jurisdiction) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income Taxes [Line Items]
Income (loss) before income tax expense (benefit)	¥ 870,842	¥ 1,661,819	¥ 272,543
Domestic Income (loss) [Member]
Income Taxes [Line Items]
Income (loss) before income tax expense (benefit)	228,018	803,057	(413,499)
Foreign Income [Member]
Income Taxes [Line Items]
Income (loss) before income tax expense (benefit)	¥ 642,824	¥ 858,762	¥ 686,042

Income Taxes (Detail of Current

Income Taxes (Detail of Current and Deferred Income Tax Expense (Benefit)) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Current:
Domestic	¥ 57,303	¥ 180,109		¥ 176,415
Foreign	123,730	107,119		130,406
Total	181,033	287,228		306,821
Deferred:
Domestic	(32,746)	116,873		(217,485)
Foreign	(15,050)	3,722		5,117
Total	(47,796)	120,595	[1]	(212,368)	[1]
Income tax expense	133,237	407,823		94,453
Income tax expense (benefit) reported in Accumulated OCI relating to:
Investment securities	15,590	120,588		20,237
Debt valuation adjustments	4,293	(960)		(3,926)
Derivatives qualifying for cash flow hedges	(1,845)	(4,421)		(9,443)
Defined benefit plans	(38,229)	50,774		48,504
Foreign currency translation adjustments	15,148	(34,527)		(1,957)
Total	(5,043)	131,454		53,415
Total, Income tax expense (benefit)	¥ 128,194	¥ 539,277		¥ 147,868
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.

Income Taxes (Reconciliation of

Income Taxes (Reconciliation of Effective Income Tax Rates) (Detail)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Reconciliation of effective income tax rate:
Combined normal effective statutory tax rate	30.60%	30.60%	31.50%
Nondeductible expenses	0.50%	0.20%	2.00%
Impairment of goodwill			0.80%
Foreign tax credit and payments	(3.30%)	(1.70%)	(9.60%)
Lower tax rates applicable to income of subsidiaries	(2.50%)	(0.40%)	(0.20%)
Change in valuation allowance	(1.40%)	(3.00%)	25.40%
Nontaxable dividends received	(9.10%)	(2.00%)	(12.50%)
Undistributed earnings of subsidiaries	0.60%	0.70%	3.50%
Tax and interest expense for uncertainty in income taxes	0.60%	0.00%	(0.60%)
Noncontrolling interest income	0.20%	0.10%	5.40%
Effect of changes in tax laws	0.00%	(0.60%)	(9.80%)
Other-net	(0.90%)	0.60%	(1.20%)
Effective income tax rate	15.30%	24.50%	34.70%

Income Taxes (Components of Net

Income Taxes (Components of Net Deferred Tax Assets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Deferred tax assets:
Allowance for credit losses	¥ 301,222	¥ 337,718
Operating loss carryforwards	177,143	167,355
Loans	691	3,483
Accrued liabilities and other	236,363	133,728
Premises and equipment, including sale-and-leaseback transactions	158,144	120,505
Derivative financial instruments	101,118	111,677
Defined benefit plans	5,238
Valuation allowance	(218,191)	(215,130)
Total deferred tax assets	761,728	659,336
Deferred tax liabilities:
Investment securities (including trading account assets at fair value under the fair value option)	911,483	973,390
Intangible assets	38,772	52,396
Lease transactions	65,115	83,445
Defined benefit plans		15,484
Other	280,701	119,970
Total deferred tax liabilities	1,296,071	1,244,685
Net deferred tax assets (liabilities)	¥ (534,343)	¥ (585,349)

Income Taxes (Operating Loss an

Income Taxes (Operating Loss and Tax Credit Carryforwards) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	¥ 527,882
Tax credit carryforwards	52,546
Fiscal Year Ending March 31, 2020 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	33,066
Tax credit carryforwards	700
Fiscal Year Ending March 31, 2021 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	12,727
Tax credit carryforwards	194
Fiscal Year Ending March 31, 2022 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	23,346
Tax credit carryforwards	230
Fiscal Year Ending March 31, 2023 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	68,850
Tax credit carryforwards	232
Fiscal Year Ending March 31, 2024 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	105,110
Tax credit carryforwards	182
Fiscal Year Ending March 31, 2025 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	167,035
Tax credit carryforwards	117
Fiscal Year Ending March 31, 2026 and Thereafter [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	95,686
Tax credit carryforwards	46,239
No Definite Expiration Date [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	22,062
Tax credit carryforwards	¥ 4,652

Income Taxes (Roll-forward of U

Income Taxes (Roll-forward of Unrecognized Tax Benefits) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Roll-forward of unrecognized tax benefits:
Balance at beginning of fiscal year	¥ 12,917	¥ 7,851	¥ 9,950
Gross amount of increases for current year's tax positions	313	427	888
Gross amount of increases for prior years' tax positions	8,836	6,642	1,014
Gross amount of decreases for prior years' tax positions	(1,090)	(455)	(95)
Net amount of changes relating to settlements with tax authorities		(1,074)	(39)
Decreases due to lapse of applicable statutes of limitations	(1,540)	(253)	(3,437)
Foreign exchange translation and others	(276)	(221)	(430)
Balance at end of fiscal year	¥ 19,160	¥ 12,917	¥ 7,851

Income Taxes (Roll-forward of I

Income Taxes (Roll-forward of Interest and Penalties Recognized) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Balance at beginning of fiscal year	¥ 4,564	¥ 4,054	¥ 4,727
Total interest and penalties in the consolidated statements of income	(1,655)	694	(591)
Total cash settlements, foreign exchange translation and others	147	(184)	(82)
Balance at end of fiscal year	¥ 3,056	¥ 4,564	¥ 4,054

Income Taxes (Status of Years u

Income Taxes (Status of Years under Audit or Open to Examination by Major Tax Jurisdictions) (Detail)	12 Months Ended
	Mar. 31, 2019
Japan [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2018 and forward
United States - Federal [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2014 and forward
United States - California [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2015 and forward
Thailand [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2012 and forward
Indonesia [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2017 and forward

Pledged Assets and Collateral (

Pledged Assets and Collateral (Narrative) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Financial Instruments Pledged as Collateral [Abstract]
Investment securities pledged for acting as a collection agent of public funds	¥ 19,875,392
Reserve funds included in Cash and due from banks and Interest-earning deposits in other banks	2,568,340	¥ 2,679,482
Pledged assets that may not be sold or repledged by secured parties	30,204,000
Fair value of securities accepted as collateral that is permitted to be sold or repledged	22,927,000	25,358,000
Fair value of securities accepted as collateral that was sold or repledged	16,514,000	17,738,000
Cash collateral pledged for derivative transactions included in Other assets	1,276,897	1,473,109
Cash collateral received for derivative transactions included in Other liabilities	¥ 844,234	¥ 1,158,053

Pledged Assets and Collateral_3

Pledged Assets and Collateral (Assets Mortgaged, Pledged, or Otherwise Subject to Lien) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 31,072,624
Trading Account Securities [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	8,921,825
Investment Securities [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	7,907,010
Loans [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	14,192,075
Other [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 51,714

Pledged Assets and Collateral_4

Pledged Assets and Collateral (Pledged Assets Classified by Type of Liabilities) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 31,072,624
Deposits [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	223,075
Payables under Repurchase Agreements and Securities Lending Transactions [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	16,316,732
Other Short-term Borrowings and Long-term Debt [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	14,522,393
Other [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 10,424

Deposits (Narrative) (Detail)

Deposits (Narrative) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)	Mar. 29, 2019JPY (¥)	Mar. 29, 2019USD ($)	Mar. 31, 2018JPY (¥)
Deposits [Line Items]
Time deposits, including certificates of deposits ("CDs"), issued in amount of JPY10 million or more, Domestic deposits	¥ 25,899,780			¥ 27,381,920
Foreign [Member]
Deposits [Line Items]
Time deposits, including certificates of deposits ("CDs"), issued in amount of U.S.$100,000 or more, Foreign deposits	¥ 23,858,381			¥ 22,386,612
Minimum [Member]
Deposits [Line Items]
Issue amount of domestic time deposits in Japanese Yen		¥ 10
U.S.$ equivalent of JPY10 million based on Federal Reserve Bank of New York's noon buying rate | $			$ 90,000
Issue amount of foreign time deposits in U.S. dollars | $			$ 100,000

Deposits (Time Deposits by Matu

Deposits (Time Deposits by Maturity) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Domestic [Member]
Maturities of time deposits:
Due in one year or less	¥ 33,351,324
Due after one year through two years	4,987,763
Due after two years through three years	2,688,960
Due after three years through four years	539,629
Due after four years through five years	574,244
Due after five years	836,549
Total	42,978,469
Foreign [Member]
Maturities of time deposits:
Due in one year or less	23,559,245
Due after one year through two years	1,145,596
Due after two years through three years	351,794
Due after three years through four years	146,985
Due after four years through five years	22,104
Due after five years	29,634
Total	¥ 25,255,358

Call Money and Funds Purchase_3

Call Money and Funds Purchased (Summary of Funds Transactions) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Call Money and Funds Purchased Transactions [Line Items]
Outstanding at end of fiscal year, Amount	¥ 2,450,320	¥ 2,452,543
Outstanding at end of fiscal year, Weighted average interest rate	0.12%	0.31%
Minimum [Member]
Call Money and Funds Purchased Transactions [Line Items]
Outstanding at end of fiscal year, Principal range of maturities	1 day	1 day
Maximum [Member]
Call Money and Funds Purchased Transactions [Line Items]
Outstanding at end of fiscal year, Principal range of maturities	30 days	30 days

Due to Trust Account (Summary o

Due to Trust Account (Summary of Due to Trust Account Transactions) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Due To Trust Account [Abstract]
Amount outstanding at end of fiscal year	¥ 2,735,952	¥ 3,386,158
Weighted average interest rate on outstanding balance at end of fiscal year	0.00%	0.00%

Short-term Borrowings and Lon_3

Short-term Borrowings and Long-term Debt (Narrative) (Detail) € in Millions, ¥ in Millions, $ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2019JPY (¥)	Mar. 31, 2019USD ($)	Mar. 31, 2019EUR (€)	Mar. 31, 2019HKD ($)	Mar. 31, 2018JPY (¥)
Debt Instrument [Line Items]
Unused lines of credit for financing	¥ 5,525,069				¥ 5,142,206
Basel III [Member]
Debt Instrument [Line Items]
Floor of Common Equity Tier 1 ratio, which leads the Group's discretion over unsecured perpetual subordinated Additional Tier 1 notes	5.125%
Minimum TLAC ratio, required by January 1, 2019, over risk weighted assets	16.00%
Minimum TLAC ratio, required by January 1, 2019, over leverage ratio denominator	6.00%
Minimum TLAC ratio, required by January 1, 2022, over risk weighted assets	18.00%
Minimum TLAC ratio, required by January 1, 2022, over leverage ratio denominator	6.75%
Basel III [Member] | Unsecured Perpetual Subordinated Additional Tier 1 Notes [Member]
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	¥ 155,000
Basel III [Member] | Bonds for TLAC [Member] | U.S. Dollars
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	1,467,288	$ 13,220
Basel III [Member] | Bonds for TLAC [Member] | Euro
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	124,560		€ 1,000
Basel III [Member] | Bonds for TLAC [Member] | H.K. Dollars
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	¥ 4,270			$ 302

Short-term Borrowings and Lon_4

Short-term Borrowings and Long-term Debt (Components of Other Short-term Borrowings) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Short-term Debt [Line Items]
Other short-term borrowings	¥ 6,732,118	¥ 6,881,262
Less unamortized discount	1,045	138
Other short-term borrowings, net	¥ 6,731,073	¥ 6,881,124
Weighted average interest rate on outstanding balance at end of fiscal year	1.97%	1.29%
Domestic [Member]
Short-term Debt [Line Items]
Other short-term borrowings	¥ 1,624,286	¥ 1,728,595
Domestic [Member] | Commercial Paper [Member]
Short-term Debt [Line Items]
Other short-term borrowings	1,033,568	1,094,487
Domestic [Member] | Borrowings from Bank of Japan [Member]
Short-term Debt [Line Items]
Other short-term borrowings	241,070	305,520
Domestic [Member] | Borrowings from Other Financial Institutions [Member]
Short-term Debt [Line Items]
Other short-term borrowings	227,482	243,968
Domestic [Member] | Other [Member]
Short-term Debt [Line Items]
Other short-term borrowings	122,166	84,620
Foreign [Member]
Short-term Debt [Line Items]
Other short-term borrowings	5,107,832	5,152,667
Foreign [Member] | Commercial Paper [Member]
Short-term Debt [Line Items]
Other short-term borrowings	3,929,636	4,275,278
Foreign [Member] | Borrowings from Other Financial Institutions [Member]
Short-term Debt [Line Items]
Other short-term borrowings	967,901	784,949
Foreign [Member] | Short-term Debentures [Member]
Short-term Debt [Line Items]
Other short-term borrowings	68,492	18,523
Foreign [Member] | Other [Member]
Short-term Debt [Line Items]
Other short-term borrowings	¥ 141,803	¥ 73,917

Short-term Borrowings and Lon_5

Short-term Borrowings and Long-term Debt (Components of Long-term Debt) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Debt Instrument [Line Items]
Total, before debt issuance costs		¥ 28,005,896	¥ 27,083,245
Debt issuance cost		(15,353)	(13,689)
Total, after debt issuance costs		27,990,543	27,069,556
MUFG [Member]
Debt Instrument [Line Items]
Obligations under capital leases		1,725	1,973
Total, before debt issuance costs		7,465,851	5,362,561
MUFG [Member] | Unsubordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		4,080,187	2,410,872
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 2,949,022	1,737,809
Payable, currency		US dollars
Maturity date range, Start		2021
Maturity date range, End		2039
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.19%
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.29%
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 301,124	230,629
Payable, currency		Euro
Maturity date range, Start		2021
Maturity date range, End		2033
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.40%
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.75%
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 21,257	17,639
Payable, currency		Other currencies
Maturity date range, Start		2025
Maturity date range, End		2027
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds III [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.55%
MUFG [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds III [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.05%
MUFG [Member] | Unsubordinated Debt [Member] | Floating Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 765,188	424,795
Payable, currency		US dollars
Maturity date range, Start		2021
Maturity date range, End		2023
MUFG [Member] | Unsubordinated Debt [Member] | Floating Rate Bonds I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.31%
MUFG [Member] | Unsubordinated Debt [Member] | Floating Rate Bonds I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.51%
MUFG [Member] | Unsubordinated Debt [Member] | Floating Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 43,596
Payable, currency		Euro
Maturity date		2023
Interest rate, stated percentage		0.24%
MUFG [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 3,383,939	2,949,716
MUFG [Member] | Subordinated Debt [Member] | Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 618,925	482,662
Payable, currency		Japanese yen
Maturity date range, Start		2024
Maturity date range, End		2030
MUFG [Member] | Subordinated Debt [Member] | Fixed Rate Bonds I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.37%
MUFG [Member] | Subordinated Debt [Member] | Fixed Rate Bonds I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.39%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 890,359	795,944
Payable, currency		Japanese yen
Maturity date range, Start		2024
Maturity date range, End		2028
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Bonds I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.30%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Bonds I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.66%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,706,695	1,557,610
Payable, currency		Japanese yen
Maturity date		No stated maturity
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Bonds II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.03%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Bonds II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.42%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 32,500	32,500
Payable, currency		Japanese yen
Maturity date range, Start		2025
Maturity date range, End		2028
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.46%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.50%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 45,960	1,500
Payable, currency		Japanese yen
Maturity date		No stated maturity
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.17%
MUFG [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.78%
MUFG [Member] | Subordinated Debt [Member] | Floating Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 3,500	3,500
Payable, currency		Japanese yen
Maturity date		No stated maturity
Interest rate, stated percentage		3.00%
MUFG [Member] | Subordinated Debt [Member] | Floating Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 86,000	76,000
Payable, currency		Japanese yen
Maturity date range, Start		2025
Maturity date range, End		2028
MUFG [Member] | Subordinated Debt [Member] | Floating Rate Borrowings I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.57%
MUFG [Member] | Subordinated Debt [Member] | Floating Rate Borrowings I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.79%
BK [Member]
Debt Instrument [Line Items]
Obligations under capital leases		¥ 7,704	6,906
Total, before debt issuance costs		15,141,912	14,512,049
BK [Member] | Obligations under Sale-and-leaseback Transactions [Member]
Debt Instrument [Line Items]
Long-term debt		40,732	41,892
BK [Member] | Unsubordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		13,477,619	12,638,440
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 234,500	346,800
Payable, currency		Japanese yen
Maturity date range, Start		2019
Maturity date range, End		2027
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.22%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.69%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,284,812	1,451,745
Payable, currency		US dollars
Maturity date range, Start		2019
Maturity date range, End		2049
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.70%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds III [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 112,687	111,956
Payable, currency		Euro
Maturity date range, Start		2022
Maturity date range, End		2037
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds III [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.88%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds III [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.06%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds IV [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 19,084	19,502
Payable, currency		Other currencies
Maturity date range, Start		2021
Maturity date range, End		2047
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds IV [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Bonds IV [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		5.30%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 10,786,372	9,561,784
Payable, currency		Japanese yen
Maturity date range, Start		2019
Maturity date range, End		2028
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.25%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]		¥ 38
Payable, currency			US dollars
Maturity date			2018
Interest rate, stated percentage			7.49%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings III [Member]
Debt Instrument [Line Items]
Long-term debt	[1]		¥ 1,044
Payable, currency			Euro
Maturity date			2026
Interest rate, stated percentage			0.00%
BK [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings IV [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 9,483
Payable, currency		Other currencies
Maturity date		2030
Interest rate, stated percentage		2.93%
BK [Member] | Unsubordinated Debt [Member] | Adjustable Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,110	¥ 1,062
Payable, currency		US dollars
Maturity date		2030
Interest rate, stated percentage		3.00%
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]		¥ 53,120
Payable, currency			US dollars
Maturity date			2018
Interest rate, stated percentage			3.13%
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,008,949	¥ 1,071,239
Payable, currency		US dollars
Maturity date range, Start		2019
Maturity date range, End		2031
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.64%
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.34%
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 15,382	20,150
Payable, currency		Euro
Maturity date range, Start		2021
Maturity date range, End		2022
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.06%
BK [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 5,240
Payable, currency		Other currencies
Maturity date		2028
Interest rate, stated percentage		3.23%
BK [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 976,820	1,202,750
BK [Member] | Subordinated Debt [Member] | Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 513,420	520,350
Payable, currency		Japanese yen
Maturity date range, Start		2019
Maturity date range, End		2031
BK [Member] | Subordinated Debt [Member] | Fixed Rate Bonds I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.31%
BK [Member] | Subordinated Debt [Member] | Fixed Rate Bonds I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.91%
BK [Member] | Subordinated Debt [Member] | Fixed Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 73,400	98,400
Payable, currency		Japanese yen
Maturity date range, Start		2022
Maturity date range, End		2035
BK [Member] | Subordinated Debt [Member] | Fixed Rate Borrowings I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.37%
BK [Member] | Subordinated Debt [Member] | Fixed Rate Borrowings I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.24%
BK [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 20,000	73,000
Payable, currency		Japanese yen
Maturity date range, Start		2024
Maturity date range, End		2028
BK [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.37%
BK [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.56%
BK [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 355,000	496,000
Payable, currency		Japanese yen
Maturity date		No stated maturity
BK [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.67%
BK [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.78%
BK [Member] | Subordinated Debt [Member] | Floating Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 15,000	15,000
Payable, currency		Japanese yen
Maturity date		2027
Interest rate, stated percentage		0.19%
BK [Member] | Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 639,037	622,061
Maturity date range, Start		2019
Maturity date range, End		2078
BK [Member] | Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.13%
BK [Member] | Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		6.90%
Other Subsidiaries [Member]
Debt Instrument [Line Items]
Obligations under capital leases		¥ 13,107	9,835
Total, before debt issuance costs		5,398,133	7,208,635
Other Subsidiaries [Member] | Unsubordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		4,910,200	6,447,691
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,291,537	3,453,352
Payable, currency		Japanese yen
Maturity date range, Start		2019
Maturity date range, End		2044
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		20.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,385,936	936,086
Payable, currency		US dollars
Maturity date range, Start		2019
Maturity date range, End		2037
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		34.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes III [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 2,479	2,619
Payable, currency		Euro
Maturity date range, Start		2020
Maturity date range, End		2026
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes III [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.15%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes III [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.28%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes IV [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 334,586	330,814
Payable, currency		Thai baht
Maturity date range, Start		2019
Maturity date range, End		2025
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes IV [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.01%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes IV [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		7.15%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes V [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 219,781	190,567
Payable, currency		Other currencies
Maturity date range, Start		2019
Maturity date range, End		2037
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes V [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes V [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		15.33%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating/Adjustable Rate Borrowings Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,425,387	1,342,318
Payable, currency		Japanese yen
Maturity date range, Start		2019
Maturity date range, End		2048
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating/Adjustable Rate Borrowings Bonds and Notes I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating/Adjustable Rate Borrowings Bonds and Notes I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		7.70%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 244,253	186,515
Payable, currency		US dollars
Maturity date range, Start		2019
Maturity date range, End		2028
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		27.00%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes II [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 6,241	5,420
Payable, currency		Other currencies
Maturity date range, Start		2019
Maturity date range, End		2022
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.43%
Other Subsidiaries [Member] | Unsubordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.41%
Other Subsidiaries [Member] | Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 472,013	700,558
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 269,373	364,326
Payable, currency		Japanese yen
Maturity date range, Start		2019
Maturity date range, End		2030
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.65%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Borrowings, Bonds and Notes I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.61%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,409	1,661
Payable, currency		US dollars
Maturity date range, Start		2019
Maturity date range, End		2027
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Bonds and Notes I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		7.50%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Bonds and Notes I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		10.85%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Bonds and Notes II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 143,212	144,900
Payable, currency		Thai baht
Maturity date range, Start		2020
Maturity date range, End		2027
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Bonds and Notes II [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.40%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Bonds and Notes II [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.90%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Fixed Rate Bonds and Notes III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 7,347	7,428
Payable, currency		Other currencies
Maturity date		2021
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Adjustable Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 4,500	104,500
Payable, currency		Japanese yen
Maturity date		No stated maturity
Interest rate, stated percentage		2.83%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 41,000	72,493
Payable, currency		Japanese yen
Maturity date range, Start		2019
Maturity date range, End		2021
Other Subsidiaries [Member] | Subordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.53%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Floating Rate Borrowings, Bonds and Notes I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.73%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Floating Rate Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 5,172	5,250
Payable, currency		US dollars
Maturity date range, Start		2019
Maturity date range, End		2036
Other Subsidiaries [Member] | Subordinated Debt [Member] | Floating Rate Bonds and Notes I [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.49%
Other Subsidiaries [Member] | Subordinated Debt [Member] | Floating Rate Bonds and Notes I [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		11.86%
Other Subsidiaries [Member] | Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 2,813	¥ 50,551
Maturity date range, Start		2020
Maturity date range, End		2022
Other Subsidiaries [Member] | Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.10%
Other Subsidiaries [Member] | Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.20%
[1]	Adjustable rate debts are debts where interest rates are reset in accordance with the terms of the debt agreements, and floating rate debts are debts where interest rates are repriced in accordance with movements of markets indices.
[2]	Minor currencies, such as Australian dollars, British pounds, Indonesian rupiah, Brazilian real, Russian ruble, etc, have been summarized into the "other currencies" classification.

Short-term Borrowings and Lon_6

Short-term Borrowings and Long-term Debt (Summary of Subsequent Maturities of Long-term Debt) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Long-term debt by maturity:
2020	¥ 3,053,935
2021	10,133,224
2022	4,059,480
2023	1,989,719
2024	996,081
2025 and thereafter	7,773,457
Total	28,005,896	¥ 27,083,245
MUFG [Member]
Long-term debt by maturity:
2020	450
2021	685,348
2022	1,172,368
2023	746,235
2024	265,873
2025 and thereafter	4,595,577
Total	7,465,851	5,362,561
BK [Member]
Long-term debt by maturity:
2020	1,551,272
2021	8,552,229
2022	2,166,840
2023	663,227
2024	315,828
2025 and thereafter	1,892,516
Total	15,141,912	14,512,049
Other Subsidiaries [Member]
Long-term debt by maturity:
2020	1,502,213
2021	895,647
2022	720,272
2023	580,257
2024	414,380
2025 and thereafter	1,285,364
Total	¥ 5,398,133	¥ 7,208,635

Severance Indemnities and Pen_3

Severance Indemnities and Pension Plans (Narrative) (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2019JPY (¥)Age	Mar. 31, 2018JPY (¥)	Mar. 31, 2017JPY (¥)
Defined Benefit Plan Disclosure [Line Items]
Eligible age for lifetime annuity payments | Age	65
Special lump-sum early termination benefits charged to operations for the fiscal year	¥ 9,325	¥ 10,153	¥ 7,722
Defined contribution plan cost charged to operations for the fiscal year	17,859	17,413	¥ 15,636
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Debt Securities and Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of debt securities issued by the MUFG Group included in plan assets	¥ 1,224	¥ 982
Percentage of fair value of debt securities issued by the MUFG Group to total fair value of plan assets	0.04%	0.03%
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of common stock issued by the MUFG Group included in plan assets	¥ 5,414	¥ 7,596
Percentage of fair value of common stock issued by the MUFG Group to total fair value of plan assets	0.18%	0.24%

Severance Indemnities and Pen_4

Severance Indemnities and Pension Plans (Components of Net Periodic Cost of Pension Benefits and Other Benefits) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (income)	¥ (19,839)	¥ (7,955)	[1]	¥ 20,274	[1]
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost-benefits earned during the fiscal year	48,352	47,064		49,057
Interest cost on projected benefit obligation	13,504	14,383		12,308
Expected return on plan assets	(74,270)	(68,432)		(60,255)
Amortization of net actuarial loss	731	7,309		17,764
Amortization of prior service cost	(1,210)	(1,094)		(6,348)
Loss (gain) on settlements and curtailment	(5,980)	(4,394)		(1,765)
Net periodic benefit cost (income)	(18,873)	(5,164)		10,761
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost-benefits earned during the fiscal year	12,395	10,169		13,107
Interest cost on projected benefit obligation	14,958	15,359		15,287
Expected return on plan assets	(33,266)	(32,110)		(29,339)
Amortization of net actuarial loss	9,993	8,847		12,707
Amortization of prior service cost	(3,039)	(3,090)		(2,045)
Loss (gain) on settlements and curtailment	49	52		(208)
Net periodic benefit cost (income)	1,090	(773)		9,509
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost-benefits earned during the fiscal year	525	676		990
Interest cost on projected benefit obligation	1,046	1,079		1,229
Expected return on plan assets	(2,314)	(2,122)		(2,047)
Amortization of net actuarial loss	707	1,124		1,366
Amortization of prior service cost	(2,020)	(2,775)		(1,534)
Net periodic benefit cost (income)	¥ (2,056)	¥ (2,018)		¥ 4
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.

Severance Indemnities and Pen_5

Severance Indemnities and Pension Plans (Summary of Assumptions Used in Computation) (Detail)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used, Discount rates in determining expense	0.76%	0.82%	0.68%
Weighted-average assumptions used, Discount rates in determining benefit obligation	0.61%	0.76%	0.82%
Weighted-average assumptions used, Rates of increase in future compensation level for determining expense	3.21%	3.23%	3.23%
Weighted-average assumptions used, Rates of increase in future compensation level for determining benefit obligation	3.21%	3.21%	3.23%
Weighted-average assumptions used, Expected rates of return on plan assets	2.83%	2.87%	2.75%
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used, Discount rates in determining expense	3.19%	3.52%	3.90%
Weighted-average assumptions used, Discount rates in determining benefit obligation	3.87%	3.38%	3.81%
Weighted-average assumptions used, Rates of increase in future compensation level for determining expense	4.65%	4.65%	4.65%
Weighted-average assumptions used, Rates of increase in future compensation level for determining benefit obligation	5.01%	4.65%	4.65%
Weighted-average assumptions used, Expected rates of return on plan assets	6.70%	6.71%	6.80%
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used, Discount rates in determining expense	3.27%	3.61%	3.03%
Weighted-average assumptions used, Discount rates in determining benefit obligation	3.99%	3.43%	3.86%
Weighted-average assumptions used, Expected rates of return on plan assets	7.50%	7.50%	7.50%

Severance Indemnities and Pen_6

Severance Indemnities and Pension Plans (Assumed Health Care Cost Trend Rates and Effect of a One-percentage-point Change for Foreign Offices and Subsidiaries) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
MUAH [Member]
Defined benefit plan, assumed health care cost trend rates for the next fiscal year:
Initial trend rate	[1]	4.44%	4.44%
Ultimate trend rate	[1]	3.94%	3.94%
Year the rate reaches the ultimate trend rate	[1]	2027	2026
Defined benefit plan, effect of one-percentage-point change in assumed health care cost trend rates:
Effect of one-percentage-point increase on total of service and interest cost components		¥ 183
Effect of one-percentage-point decrease on total of service and interest cost components		(152)
Effect of one-percentage-point increase on postretirement benefit obligation		3,110
Effect of one-percentage-point decrease on postretirement benefit obligation		¥ (2,630)
Other than MUAH [Member]
Defined benefit plan, assumed health care cost trend rates for the next fiscal year:
Initial trend rate	[1]	7.00%	7.00%
Ultimate trend rate	[1]	4.50%	4.50%
Year the rate reaches the ultimate trend rate	[1]	2027	2026
Defined benefit plan, effect of one-percentage-point change in assumed health care cost trend rates:
Effect of one-percentage-point increase on total of service and interest cost components		¥ 44
Effect of one-percentage-point decrease on total of service and interest cost components		(35)
Effect of one-percentage-point increase on postretirement benefit obligation		812
Effect of one-percentage-point decrease on postretirement benefit obligation		¥ (644)
[1]	Fiscal years of MUFG Americas Holdings and foreign subsidiaries end on December 31. Therefore, the above tables present the rates and amounts at December 31, 2017 and 2018, respectively.

Severance Indemnities and Pen_7

Severance Indemnities and Pension Plans (Combined Funded Status and Amounts Recognized in Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	¥ 839,757	¥ 884,979
Accrued benefit cost	(65,690)	(64,735)
Domestic, Japan [Member] | Non-contributory Pension Benefits and SIP [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	1,821,794	1,793,848
Service cost	48,352	47,064
Interest cost	13,504	14,383
Acquisitions / Divestitures	(160)	(29)
Actuarial loss (gain)	43,527	49,678
Benefits paid	(66,539)	(67,913)
Lump-sum payment	(18,594)	(15,237)
Benefit obligation at end of fiscal year	1,841,884	1,821,794	¥ 1,793,848
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	2,603,329	2,346,310
Actual return on plan assets	13,664	250,704
Employer contributions	44,427	74,181
Acquisitions / Divestitures	(93)	47
Benefits paid	(66,539)	(67,913)
Fair value of plan assets at end of fiscal year	2,594,788	2,603,329	2,346,310
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	770,564	798,849
Accrued benefit cost	(17,660)	(17,314)
Net amount recognized	752,904	781,535
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	502,056	478,463
Service cost	12,395	10,169	13,107
Interest cost	14,958	15,359	15,287
Plan participants' contributions	37	28
Acquisitions / Divestitures	(17)
Amendments	64
Actuarial loss (gain)	(28,466)	25,519
Benefits paid	(19,894)	(19,388)
Lump-sum payment	(1,750)	(861)
Translation adjustments and other	(10,303)	(7,233)
Benefit obligation at end of fiscal year	469,080	502,056	478,463
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	542,646	477,479
Actual return on plan assets	(21,353)	75,824
Employer contributions	3,117	16,969
Plan participants' contributions	37	28
Benefits paid	(19,894)	(19,388)
Translation adjustments and other	(11,058)	(8,266)
Fair value of plan assets at end of fiscal year	493,495	542,646	477,479
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	67,821	83,578
Accrued benefit cost	(43,406)	(42,988)
Net amount recognized	24,415	40,590
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	34,347	35,222
Service cost	525	676	990
Interest cost	1,046	1,079	1,229
Plan participants' contributions	452	455
Actuarial loss (gain)	(2,354)	506
Benefits paid	(2,221)	(2,520)
Translation adjustments and other	(285)	(1,071)
Benefit obligation at end of fiscal year	31,510	34,347	35,222
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	32,466	30,339
Actual return on plan assets	(1,948)	4,890
Employer contributions	102	190
Plan participants' contributions	452	455
Benefits paid	(2,221)	(2,520)
Translation adjustments and other	(593)	(888)
Fair value of plan assets at end of fiscal year	28,258	32,466	¥ 30,339
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	1,372	2,552
Accrued benefit cost	(4,624)	(4,433)
Net amount recognized	¥ (3,252)	¥ (1,881)

Severance Indemnities and Pen_8

Severance Indemnities and Pension Plans (Aggregated Accumulated Benefit Obligations) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregated accumulated benefit obligations	¥ 1,800,992	¥ 1,784,837
Foreign Offices and Subsidiaries [Member] | Pension Benefits and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregated accumulated benefit obligations	¥ 457,048	¥ 475,522

Severance Indemnities and Pen_9

Severance Indemnities and Pension Plans (Summary for Plans with Accumulated Benefit Obligations in Excess of Plan Assets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined benefit plan, pension plans with accumulated benefit obligations in excess of plan assets:
Projected benefit obligations	¥ 23,108	¥ 22,445
Accumulated benefit obligations	23,108	22,445
Fair value of plan assets	5,629	5,272
Foreign Offices and Subsidiaries [Member] | Pension Benefits and Other Benefits [Member]
Defined benefit plan, pension plans with accumulated benefit obligations in excess of plan assets:
Projected benefit obligations	63,273	62,511
Accumulated benefit obligations	52,249	52,012
Fair value of plan assets	¥ 19,866	¥ 19,521

Severance Indemnities and Pe_10

Severance Indemnities and Pension Plans (Amounts Recognized in Accumulated OCI) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized in Accumulated OCI	¥ 208,273	¥ 119,593	¥ 214,062	¥ 317,422
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	245,037	135,656
Prior service cost	(5,459)	(6,669)
Gross amount recognized in Accumulated OCI	239,578	128,987
Taxes	(115,816)	(81,747)
Net amount recognized in Accumulated OCI	123,762	47,240
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	126,238	111,820
Prior service cost	(14,536)	(17,936)
Gross amount recognized in Accumulated OCI	111,702	93,884
Taxes	(29,875)	(25,251)
Net amount recognized in Accumulated OCI	81,827	68,633
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	8,628	7,449
Prior service cost	(4,263)	(6,237)
Gross amount recognized in Accumulated OCI	4,365	1,212
Taxes	(1,282)	(358)
Net amount recognized in Accumulated OCI	¥ 3,083	¥ 854

Severance Indemnities and Pe_11

Severance Indemnities and Pension Plans (Amounts Recognized in OCI) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Losses (gains) due to amortization:
Total changes in Accumulated OCI	¥ 127,169	¥ (160,612)	¥ (152,076)
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain) arising during the year	104,132	(132,593)
Losses (gains) due to amortization:
Net actuarial loss	(731)	(7,309)
Prior service cost	1,210	1,094
Curtailment and settlement	5,980	4,394
Total changes in Accumulated OCI	110,591	(134,414)
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain) arising during the year	26,155	(18,165)
Prior service cost arising during the year	65
Losses (gains) due to amortization:
Net actuarial loss	(9,993)	(8,847)
Prior service cost	3,039	3,090
Curtailment and settlement	(49)	(52)
Foreign currency translation adjustments	(1,399)	(3,502)
Total changes in Accumulated OCI	17,818	(27,476)
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain) arising during the year	1,908	(2,262)
Losses (gains) due to amortization:
Net actuarial loss	(707)	(1,124)
Prior service cost	2,020	2,775
Foreign currency translation adjustments	(68)	(36)
Total changes in Accumulated OCI	¥ 3,153	¥ (647)

Severance Indemnities and Pe_12

Severance Indemnities and Pension Plans (Expected Amounts that Will be Amortized from Accumulated OCI in Next Fiscal Year) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Expected amounts that will be amortized from Accumulated OCI in next fiscal year:
Net actuarial loss	¥ 5,395
Prior service cost	(1,269)
Total	4,126
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Expected amounts that will be amortized from Accumulated OCI in next fiscal year:
Net actuarial loss	7,731
Prior service cost	(3,056)
Total	4,675
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Expected amounts that will be amortized from Accumulated OCI in next fiscal year:
Net actuarial loss	1,130
Prior service cost	(1,916)
Total	¥ (786)

Severance Indemnities and Pe_13

Severance Indemnities and Pension Plans (Weighted-average Target Asset Allocation of Plan Assets for Pension Benefits and Other Benefits) (Detail)	Mar. 31, 2019
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	100.00%
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	39.30%
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	32.10%
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Non-Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	14.90%
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	9.10%
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	1.30%
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Short-term Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	3.30%
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	100.00%
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	0.30%
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Non-Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	48.50%
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	39.10%
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	9.90%
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Short-term Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	2.20%
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	100.00%
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member] | Non-Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	70.00%
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member] | Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	30.00%

Severance Indemnities and Pe_14

Severance Indemnities and Pension Plans (Expected Contributions to Plan Assets in Next Fiscal Year) (Detail) ¥ in Billions	Mar. 31, 2019JPY (¥)
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to plan assets in next fiscal year	¥ 32.7
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to plan assets in next fiscal year	0.7
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to plan assets in next fiscal year	¥ 0.4

Severance Indemnities and Pe_15

Severance Indemnities and Pension Plans (Estimated Future Benefit Payments) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
For the fiscal year ending March 31, 2020	¥ 84,558
For the fiscal year ending March 31, 2021	82,297
For the fiscal year ending March 31, 2022	82,320
For the fiscal year ending March 31, 2023	81,710
For the fiscal year ending March 31, 2024	81,684
Thereafter (for the fiscal years ending March 31, 2025-2029)	401,772
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
For the fiscal year ending March 31, 2020	19,923
For the fiscal year ending March 31, 2021	20,928
For the fiscal year ending March 31, 2022	21,903
For the fiscal year ending March 31, 2023	22,881
For the fiscal year ending March 31, 2024	23,726
Thereafter (for the fiscal years ending March 31, 2025-2029)	162,850
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
For the fiscal year ending March 31, 2020	1,997
For the fiscal year ending March 31, 2021	2,072
For the fiscal year ending March 31, 2022	2,129
For the fiscal year ending March 31, 2023	2,177
For the fiscal year ending March 31, 2024	2,205
Thereafter (for the fiscal years ending March 31, 2025-2029)	¥ 10,222

Severance Indemnities and Pe_16

Severance Indemnities and Pension Plans (Fair Value of Each Major Category of Plan Assets for Pension Benefits and SIP Investments: Domestic Subsidiaries) (Detail) - Domestic, Japan [Member] - Pension Benefits and SIPs [Member] - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 1,322,670	¥ 1,420,377
Approximate guaranteed rate of return of "Japanese general accounts of life insurance companies"		1.24%	1.24%
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 1,075,966	¥ 1,165,505
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		245,674	253,801
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		1,030	1,071	¥ 414
Japanese Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		146,060	139,847
Japanese Government Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		146,060	139,847
Non-Japanese Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		9,226	16,496
Non-Japanese Government Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		8,570	15,552
Non-Japanese Government Bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		656	944
Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		4,837	4,754
Other Debt Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		109	201
Other Debt Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		3,698	3,482
Other Debt Securities [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		1,030	1,071	¥ 208
Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		855,353	934,691
Japanese Marketable Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		855,353	934,691
Non-Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		65,191	71,984
Non-Japanese Marketable Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		64,957	71,729
Non-Japanese Marketable Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		234	255
Japanese General Account of Life Insurance Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	[1]	222,460	225,925
Japanese General Account of Life Insurance Companies [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	[1]	222,460	225,925
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		19,543	26,680
Other Investments [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		917	3,485
Other Investments [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 18,626	¥ 23,195
[1]	"Japanese general accounts of life insurance companies" is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2017 to March 31, 2018 and 1.24% from April 1, 2018 to March 31, 2019.

Severance Indemnities and Pe_17

Severance Indemnities and Pension Plans (Fair Value of Each Major Category of Plan Assets for Pension Benefits and SIP Investments: Foreign Offices and Subsidiaries) (Detail) - Foreign Offices and Subsidiaries [Member] - Pension Benefits [Member] - JPY (¥) ¥ in Millions		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 251,936		¥ 262,681
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		132,560		160,798
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		119,188		101,728
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		188		155		¥ 760
Non-Japanese Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		43,302		22,026
Non-Japanese Government Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		38,687		17,945
Non-Japanese Government Bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		4,615		4,081
Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		100,462		81,968
Other Debt Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		100,462		81,968
Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets				887
Japanese Marketable Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets				887
Non-Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		21,221		42,981
Non-Japanese Marketable Equity Securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		20,569		42,166
Non-Japanese Marketable Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		652		815
Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	[1]	82,330		109,795
Other Investment Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		73,286		99,798
Other Investment Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		9,044		9,997
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		4,621		5,024
Other Investments [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		18		2
Other Investments [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		4,415		4,867
Other Investments [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 188		¥ 155		¥ 760
MUAH [Member] | Other Investment Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets			¥ 68,556		¥ 93,821
MUAH [Member] | Other Investment Funds [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets					¥ 516
[1]	Other investment funds of the foreign offices and subsidiaries include mutual funds and real estate funds of ¥93,821 million and ¥516 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥68,556 million and nil, respectively, at December 31, 2018.

Severance Indemnities and Pe_18

Severance Indemnities and Pension Plans (Fair Values of Investments Valued at Net Asset per Share (or Its Equivalent) for Pension Benefits and SIP Investments) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		¥ 1,272,118	¥ 1,182,952
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Pooled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		747,035	724,101
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Pooled Funds [Member] | Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		109,915	83,205
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Pooled Funds [Member] | Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		184,121	252,730
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Pooled Funds [Member] | Non-Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		162,901	151,893
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Pooled Funds [Member] | Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		155,792	100,998
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Japanese Pooled Funds [Member] | Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		134,306	135,275
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)	[1]	525,083	458,851
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Investment Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		500,850	433,221
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Investment Funds [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		12,058	13,664
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		241,559	279,965
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)	[2]	241,559	279,965
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Investment Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		53,775	63,088
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Investment Funds [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		46,818	40,205
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Investment Funds [Member] | Common Collective Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		¥ 140,728	¥ 158,249
[1]	Other investment funds of the domestic subsidiaries include mutual funds and real estate funds of ¥433,221 million and ¥13,664 million, respectively, at March 31, 2018 and ¥500,850 million and ¥12,058 million, respectively, at March 31, 2019.
[2]	Other investment funds of the foreign offices and subsidiaries include mutual funds, real estate funds and common collective funds of ¥63,088 million, ¥40,205 million and ¥158,249 million, respectively, at March 31, 2018 and ¥53,775 million, ¥46,818 million and ¥140,728 million, respectively, at March 31, 2019.

Severance Indemnities and Pe_19

Severance Indemnities and Pension Plans (Fair Value of Each Major Category of Plan Assets for Other Post Retirement Plan Investments) (Detail) - Foreign Offices and Subsidiaries [Member] - Other Benefits [Member] - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		¥ 13,452	¥ 14,674
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		7,192	8,606
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,260	6,068
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-Japanese Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,705	2,523
Non-Japanese Government Bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,705	2,523
Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,124	5,797
Other Debt Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,124	5,797
Non-Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6	7
Non-Japanese Marketable Equity Securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6	7
Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	5,487	6,082
Other Investment Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	5,487	6,082
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		130	265
Other Investments [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			1
Other Investments [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		¥ 130	¥ 264
[1]	Other investment funds mainly consist of mutual funds.

Severance Indemnities and Pe_20

Severance Indemnities and Pension Plans (Fair Values of Investments Valued at Net Asset per Share (Or Its Equivalent) for Other Post Retirement Plan Investments) (Detail) - Foreign Offices and Subsidiaries [Member] - Other Benefits [Member] - JPY (¥) ¥ in Millions		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		¥ 14,806		¥ 17,792
Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)	[1]	¥ 14,806		¥ 17,792
MUAH [Member] | Other Investment Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)			¥ 147		¥ 553
MUAH [Member] | Other Investment Funds [Member] | Common Collective Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)			9,583		11,332
MUAH [Member] | Other Investment Funds [Member] | Pooled Separate Account with Variable Life Insurance Policies [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)			¥ 5,076		¥ 5,907
[1]	Other investment funds of the foreign offices and subsidiaries include mutual funds, common collective funds and pooled separate accounts with variable life insurance policies of ¥553 million, ¥11,332 million and ¥5,907 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥147 million, ¥9,583 million and ¥5,076 million, respectively, at December 31, 2018.

Severance Indemnities and Pe_21

Severance Indemnities and Pension Plans (Reconciliation of Plan Assets Measured at Fair Value Using Significant Unobservable Inputs (Level 3)) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		¥ 1,420,377
Fair value of plan assets at end of fiscal year		1,322,670	¥ 1,420,377
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		4,754
Fair value of plan assets at end of fiscal year		4,837	4,754
Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		26,680
Fair value of plan assets at end of fiscal year		19,543	26,680
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		262,681
Fair value of plan assets at end of fiscal year		251,936	262,681
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		81,968
Fair value of plan assets at end of fiscal year		100,462	81,968
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year	[1]	109,795
Fair value of plan assets at end of fiscal year	[1]	82,330	109,795
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		5,024
Fair value of plan assets at end of fiscal year		4,621	5,024
Level 3 [Member] | Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		1,071	414
Defined benefit plan, Realized gains (losses)		4	30
Defined benefit plan, Unrealized gains (losses)		49	(18)
Defined benefit plan, Purchase, sales and settlements		(94)	645
Defined benefit plan, Transfer into Level 3
Defined benefit plan, Transfer out of Level 3
Fair value of plan assets at end of fiscal year		1,030	1,071
Level 3 [Member] | Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		1,071	208
Defined benefit plan, Realized gains (losses)		4	(6)
Defined benefit plan, Unrealized gains (losses)		49	(18)
Defined benefit plan, Purchase, sales and settlements		(94)	887
Fair value of plan assets at end of fiscal year		1,030	1,071
Level 3 [Member] | Domestic, Japan [Member] | Pension Benefits and SIPs [Member] | Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year			206
Defined benefit plan, Realized gains (losses)			36
Defined benefit plan, Purchase, sales and settlements			(242)
Level 3 [Member] | Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		155	760
Defined benefit plan, Realized gains (losses)			51
Defined benefit plan, Unrealized gains (losses)		(3)	(2)
Defined benefit plan, Purchase, sales and settlements		36	(654)
Defined benefit plan, Transfer into Level 3
Defined benefit plan, Transfer out of Level 3
Fair value of plan assets at end of fiscal year		188	155
Level 3 [Member] | Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member] | Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of fiscal year		155	760
Defined benefit plan, Realized gains (losses)			51
Defined benefit plan, Unrealized gains (losses)		(3)	(2)
Defined benefit plan, Purchase, sales and settlements		36	(654)
Fair value of plan assets at end of fiscal year		¥ 188	¥ 155
[1]	Other investment funds of the foreign offices and subsidiaries include mutual funds and real estate funds of ¥93,821 million and ¥516 million, respectively, which were held by MUFG Americas Holdings at December 31, 2017 and ¥68,556 million and nil, respectively, at December 31, 2018.

Other Assets and Liabilities (N

Other Assets and Liabilities (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	¥ 2,487,389	¥ 2,219,196
Marketable equity securities included in investment in equity method investees, aggregated market values	2,702,838	3,186,618
Investment in equity method investees, recognized impairment losses of other-than-temporary declines in the value of investments in certain affiliated companies	¥ 51,645	29,442	¥ 5,465
Morgan Stanley [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, Ownership percentage, approximately	24.01%
Marketable Equity Securities [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	¥ 1,936,468	1,627,896
Marketable Equity Securities [Member] | Morgan Stanley MUFG Securities, Co., Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	178,679	174,459
Marketable Equity Securities [Member] | Morgan Stanley [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	¥ 1,326,339	¥ 1,206,998

Other Assets and Liabilities (M

Other Assets and Liabilities (Major Components of Other Assets and Liabilities) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Other assets:
Accounts receivable: Receivables from brokers, dealers and customers for securities transactions	¥ 1,141,075	¥ 1,017,194
Accounts receivable: Other	1,394,794	1,190,885
Investments in equity method investees	2,487,389	2,219,196
Prepaid benefit cost (Note 13)	839,757	884,979
Cash collateral pledged for derivative transactions (Note 8)	1,276,897	1,473,109
Cash collateral for the use of Bank of Japan's settlement infrastructure	911,528	851,066
Other	2,990,462	3,029,635
Total	11,041,902	10,666,064
Other liabilities:
Accounts payable: Payables to brokers, dealers and customers for securities transactions	1,289,672	1,247,652
Accounts payable: Other	1,308,733	1,357,387
Deferred tax liabilities	624,062	654,053
Allowance for off-balance sheet credit instruments	119,307	81,739
Accrued benefit cost (Note 13)	65,690	64,735
Guarantees and indemnifications	45,346	41,349
Cash collateral received for derivative transactions (Note 8)	844,234	1,158,053
Accrued and other liabilities	3,061,462	2,802,445
Total	¥ 7,358,506	¥ 7,407,413

Other Assets and Liabilities (S

Other Assets and Liabilities (Summarized Financial Information of Morgan Stanley) (Detail) - Morgan Stanley [Member] - JPY (¥) ¥ in Billions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Equity Method Investment, Summarized Financial Information, Assets
Trading assets	¥ 29,392	¥ 29,008
Securities purchased under agreements to resell	10,718	8,525
Securities borrowed	15,416	14,431
Total assets	97,223	91,207
Equity Method Investment, Summarized Financial Information, Liabilities and Equity
Deposits	19,948	17,043
Customer and other payables	21,431	20,709
Borrowings	21,165	20,713
Total liabilities	88,134	82,762
Noncontrolling interests	130	155
Equity Method Investment, Summarized Financial Information, Income and Loss
Net revenues	4,365	4,354	¥ 3,939
Total non-interest expenses	3,170	3,133	2,871
Income from continuing operations before income taxes	1,195	1,221	1,068
Net income applicable to Morgan Stanley	¥ 944	¥ 759	¥ 730

Other Assets and Liabilities _3

Other Assets and Liabilities (Summarized Financial Information of Equity Method Investees, Other than Morgan Stanley) (Detail) - Equity Method Investees Other than Morgan Stanley [Member] - JPY (¥) ¥ in Billions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Equity Method Investment, Summarized Financial Information, Assets
Net loans	¥ 15,772	¥ 14,343
Total assets	28,910	26,008
Equity Method Investment, Summarized Financial Information, Liabilities and Equity
Deposits	9,103	7,783
Total liabilities	23,423	21,209
Noncontrolling interests	1,135	1,009
Equity Method Investment, Summarized Financial Information, Income and Loss
Total interest income	1,036	901	¥ 777
Total interest expense	430	329	252
Net interest income	606	572	525
Provision for credit losses	157	136	97
Income before income tax expense	205	337	147
Net income	¥ 135	¥ 229	¥ 97

Offsetting of Derivatives, Re_3

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions (Summary of Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Offsetting [Abstract]
Derivative assets, Gross amounts of recognized assets/liabilities		¥ 13,205,000	¥ 12,585,000
Derivative assets, Gross amounts offset in the consolidated balance sheet
Derivative assets, Net amounts presented in the consolidated balance sheet	[1],[2],[3]	13,205,000	12,585,000
Derivative assets, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(10,752,000)	(9,664,000)
Derivative assets, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(590,000)	(832,000)
Derivative assets, Net amounts		1,863,000	2,089,000
Receivables under resale agreements, Gross amounts of recognized assets/liabilities		13,885,000	8,825,000
Receivables under resale agreements, Gross amounts offset in the consolidated balance sheet		(2,910,000)	(3,099,000)
Receivables under resale agreements, Net amounts presented in the consolidated balance sheet		10,974,740	5,725,921
Receivables under resale agreements, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(9,793,000)	(5,171,000)
Receivables under resale agreements, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(20,000)	(17,000)
Receivables under resale agreements, Net amounts		1,162,000	538,000
Receivables under securities borrowing transactions, Gross amounts of recognized assets/liabilities		2,759,000	9,305,000
Receivables under securities borrowing transactions, Gross amounts offset in the consolidated balance sheet			(36,000)
Receivables under securities borrowing transactions, Net amounts presented in the consolidated balance sheet		2,758,573	9,268,756
Receivables under securities borrowing transactions, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(2,693,000)	(9,208,000)
Receivables under securities borrowing transactions, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged			(1,000)
Receivables under securities borrowing transactions, Net amounts		66,000	60,000
Financial assets, Gross amounts of recognized assets/liabilities, Total		29,849,000	30,715,000
Financial assets, Gross amounts offset in the consolidated balance sheet, Total		(2,910,000)	(3,135,000)
Financial assets, Net amounts presented in the consolidated balance sheet, Total		26,939,000	27,580,000
Financial assets, Gross amounts not offset in the consolidated balance sheet, Financial instruments, Total		(23,238,000)	(24,043,000)
Financial assets, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged, Total		(610,000)	(850,000)
Financial assets, Net amounts, Total		3,091,000	2,687,000
Derivative liabilities, Gross amounts of recognized assets/liabilities		12,710,000	11,877,000
Derivative liabilities, Gross amounts offset in the consolidated balance sheet
Derivative liabilities, Net amounts presented in the consolidated balance sheet	[1],[2],[3]	12,710,000	11,877,000
Derivative liabilities, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(10,671,000)	(9,631,000)
Derivative liabilities, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(933,000)	(1,126,000)
Derivative liabilities, Net amounts		1,106,000	1,120,000
Payables under repurchase agreements, Gross amounts of recognized assets/liabilities		28,125,000	21,169,000
Payables under repurchase agreements, Gross amounts offset in the consolidated balance sheet		(2,900,000)	(3,034,000)
Payables under repurchase agreements, Net amounts presented in the consolidated balance sheet		25,225,000	18,135,000
Payables under repurchase agreements, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(24,930,000)	(17,890,000)
Payables under repurchase agreements, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(15,000)	(31,000)
Payables under repurchase agreements, Net amounts		280,000	214,000
Payables under securities lending transactions, Gross amounts of recognized assets/liabilities		913,000	8,206,000
Payables under securities lending transactions, Gross amounts offset in the consolidated balance sheet			(36,000)
Payables under securities lending transactions, Net amounts presented in the consolidated balance sheet		913,087	8,170,218
Payables under securities lending transactions, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(880,000)	(8,139,000)
Payables under securities lending transactions, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged			(12,000)
Payables under securities lending transactions, Net amounts		33,000	19,000
Obligations to return securities received as collateral, Gross amounts of recognized assets/liabilities		3,087,000	3,177,000
Obligations to return securities received as collateral, Gross amounts offset in the consolidated balance sheet
Obligations to return securities received as collateral, Net amounts presented in the consolidated balance sheet		3,087,026	3,176,962
Obligations to return securities received as collateral, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(1,244,000)	(1,072,000)
Obligations to return securities received as collateral, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged
Obligations to return securities received as collateral, Net amounts		1,843,000	2,105,000
Financial liabilities, Gross amounts of recognized assets/liabilities, Total		44,835,000	44,429,000
Financial liabilities, Gross amounts offset in the consolidated balance sheet, Total		(2,900,000)	(3,070,000)
Financial liabilities, Net amounts presented in the consolidated balance sheet, Total		41,935,000	41,359,000
Financial liabilities, Gross amounts not offset in the consolidated balance sheet, Financial instruments, Total		(37,725,000)	(36,732,000)
Financial liabilities, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged, Total		(948,000)	(1,169,000)
Financial liabilities, Net amounts, Total		¥ 3,262,000	¥ 3,458,000
[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 32.
[2]	The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts.
[3]	This table does not include contracts with embedded derivatives for which the fair value option has been elected.

Repurchase Agreements, and Se_3

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings (Gross Obligations by Remaining Contractual Maturity and Class of Collateral Pledged) (Detail) - JPY (¥) ¥ in Billions	Mar. 31, 2019	Mar. 31, 2018
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 28,125	¥ 21,169
Payables under securities lending transactions	913	8,206
Obligations to return securities received as collateral	3,087	3,177
Total	32,125	32,552
Overnight and Open [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	3,892	2,290
Payables under securities lending transactions	913	4,647
Obligations to return securities received as collateral	2,572	2,855
Total	7,377	9,792
30 Days or Less [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	18,586	14,328
Payables under securities lending transactions		2,343
Obligations to return securities received as collateral	396	202
Total	18,982	16,873
31-90 Days [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	2,824	2,004
Payables under securities lending transactions		1,216
Obligations to return securities received as collateral	117	120
Total	2,941	3,340
Over 90 Days [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	2,823	2,547
Obligations to return securities received as collateral	2
Total	¥ 2,825	¥ 2,547

Repurchase Agreements, and Se_4

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings (Secured Borrowing by the Class of Collateral Pledged) (Detail) - JPY (¥) ¥ in Billions	Mar. 31, 2019	Mar. 31, 2018
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 28,125	¥ 21,169
Payables under securities lending transactions	913	8,206
Obligations to return securities received as collateral	3,087	3,177
Total	32,125	32,552
Japanese National Government and Japanese Government Agency Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	8,306	2,462
Payables under securities lending transactions	21	7,085
Obligations to return securities received as collateral	856	1,242
Total	9,183	10,789
Foreign Government and Official Institution Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	14,291	14,316
Payables under securities lending transactions		36
Obligations to return securities received as collateral	1,286	1,344
Total	15,577	15,696
Corporate Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	705	570
Obligations to return securities received as collateral	172	84
Total	877	654
Residential Mortgage-backed Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	4,369	3,567
Total	4,369	3,567
Other Debt Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	238	121
Total	238	121
Marketable Equity Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	200	123
Payables under securities lending transactions	892	1,085
Obligations to return securities received as collateral	772	507
Total	1,864	1,715
Others [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	16	10
Obligations to return securities received as collateral	1
Total	¥ 17	¥ 10

Preferred Stock (Narrative) (De

Preferred Stock (Narrative) (Detail) - ¥ / shares	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Class of Stock [Line Items]
Number of Preferred Stock outstanding
Class 5 Preferred Stock [Member]
Class of Stock [Line Items]
Stock authorized, shares	400,000,000
Liquidation distribution per share	¥ 2,500
Class 6 Preferred Stock [Member]
Class of Stock [Line Items]
Stock authorized, shares	200,000,000
Liquidation distribution per share	¥ 2,500
Class 7 Preferred Stock [Member]
Class of Stock [Line Items]
Stock authorized, shares	200,000,000
Liquidation distribution per share	¥ 2,500

Common Stock and Capital Surp_3

Common Stock and Capital Surplus (Narrative) (Detail) - JPY (¥) ¥ in Millions	Nov. 13, 2018	May 15, 2018	Nov. 14, 2017	May 15, 2017	Dec. 10, 2018	Jun. 04, 2018	Dec. 22, 2017	Jun. 21, 2017	Dec. 22, 2016	Jun. 13, 2016	Mar. 31, 2019	Nov. 14, 2016	May 16, 2016
Common Stock [Member]
Treasury Stock:
Number of own shares repurchased					159,836,800	72,420,700	127,666,900	141,158,900	142,238,800	190,614,800
Approximate repurchase amount in aggregate of own shares based on the discretionary dealing contract					¥ 100,000	¥ 50,000	¥ 100,000	¥ 100,000	¥ 100,000	¥ 100,000
Percentage of shares allowed for repurchase over total number of outstanding shares	1.52%	0.76%	1.50%	1.49%								1.69%	1.67%
Date of own shares cancelled	Jan. 22, 2019	Jul. 20, 2018	Jan. 22, 2018	Jul. 20, 2017
Common Stock [Member] | Maximum [Member]
Treasury Stock:
Aggregated Number of shares allowed for repurchase	200,000,000	100,000,000	200,000,000	200,000,000								230,000,000	230,000,000
Aggregate amount of shares allowed for repurchase	¥ 100,000	¥ 50,000	¥ 100,000	¥ 100,000								¥ 100,000	¥ 100,000
Companies Act [Member] | Minimum [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Percentage of proceeds per issuance of common stock, including conversions of bonds and notes, to be credited to the common stock account											50.00%
Percentage of outstanding common stock issued as free share distribution prior to April 1, 1991											5.00%
Companies Act [Member] | Maximum [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Percentage of outstanding common stock issued as free share distribution prior to April 1, 1991											10.00%
BK and TB [Member] | Companies Act [Member] | Common Stock [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Increase (decrease) by amount equal to the fair value of the shares issued by the application of U.S. accounting practices for issuance of free shares distribution made prior to April 1, 1991											¥ 1,910,106
BK and TB [Member] | Companies Act [Member] | Unappropriated Retained Earnings [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Increase (decrease) by amount equal to the fair value of the shares issued by the application of U.S. accounting practices for issuance of free shares distribution made prior to April 1, 1991											¥ (1,910,106)

Common Stock and Capital Surp_4

Common Stock and Capital Surplus (Changes in Number of Issued Shares of Common Stock) (Detail) - Common Stock [Member] - shares	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Common Stock and Capital Surplus Disclosure [Line Items]
Balance at beginning of fiscal year	13,900,028,020	14,168,853,820	14,168,853,820
Retirement of shares of common stock	(232,257,500)	(268,825,800)
Balance at end of fiscal year	13,667,770,520	13,900,028,020	14,168,853,820

Retained Earnings, Legal Rese_2

Retained Earnings, Legal Reserve and Dividends (Narrative) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018	Oct. 01, 2005	Apr. 02, 2001
Retained Earnings Appropriated and Transferred [Line Items]
Legal capital surplus	¥ 5,577,186	¥ 5,740,165
Common stock and preferred stock issued, Value	¥ 2,090,270	¥ 2,090,270
Companies Act [Member] | Minimum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash set aside as legal reserve	10.00%
Companies Act [Member] | Maximum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus over stated capital	25.00%
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus available for dividends over stated capital	25.00%
Banking Law [Member] | Minimum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash set aside as legal reserve	20.00%
Banking Law [Member] | Maximum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus over stated capital	100.00%
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus available for dividends over stated capital	100.00%
Code and Japanese GAAP [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Common stock issued, Value				¥ 924,400
Preferred stock issued, Value				222,100
Legal capital surplus			¥ 3,577,570	2,838,693
Common stock and preferred stock issued, Value			1,383,052
Retained earnings			¥ 757,458
Japanese GAAP [Member]
Retained Earnings Appropriated and Transferred [Line Items]
MUFG's amount available for dividends	¥ 4,221,793

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Changes in Accumulated OCI, Net of Tax and Net of Noncontrolling Interests) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gains (losses) on investment securities, Balance at beginning of fiscal year	[1]	¥ 2,270,346	¥ 2,032,807	¥ 1,995,314
Net unrealized gains (losses) on investment securities, Net change during the fiscal year	[1]	60,616	244,249	31,984
Net unrealized gains (losses) on investment securities, Balance at end of fiscal year	[1]	(369,369)	2,270,346	2,032,807
Net debt valuation adjustments, Balance at beginning of fiscal year		(16,488)	(10,632)	(2,080)
Net debt valuation adjustments, Net change during the fiscal year		9,729	(2,178)	(8,552)
Net debt valuation adjustments, Balance at end of fiscal year		(8,670)	(16,488)	(10,632)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Balance at beginning of fiscal year		(19,250)	(8,729)	4,516
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Net change during the fiscal year		(4,890)	(7,025)	(13,245)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Balance at end of fiscal year		(24,140)	(19,250)	(8,729)
Defined benefit plans, Balance at beginning of fiscal year		(119,593)	(214,062)	(317,422)
Defined benefit plans, Net change during the fiscal year		(88,680)	109,012	103,360
Defined benefit plans, Balance at end of fiscal year		(208,273)	(119,593)	(214,062)
Foreign currency translation adjustments, Balance at beginning of fiscal year		362,300	482,039	620,931
Foreign currency translation adjustments, Net change during the fiscal year		(36,117)	(119,213)	(137,256)
Foreign currency translation adjustments, Balance at end of fiscal year		326,183	362,300	482,039
Accumulated other comprehensive income (loss), net of taxes: Balance at end of fiscal year		(284,269)	2,477,315	2,281,423
Net Unrealized Gains (Losses) on Investment Securities [Member] | Foreign Affiliated Company [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance	[1]		118
Net Unrealized Gains (Losses) on Investment Securities [Member] | Consolidation of Certain Variable Interest Entities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance	[1]			5,509
Net Unrealized Gains (Losses) on Investment Securities [Member] | Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance	[1]		(6,828)
Net Unrealized Gains (Losses) on Investment Securities [Member] | Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance	[1]	(2,700,331)
Net Debt Valuation Adjustments [Member] | Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance			(3,678)
Net Debt Valuation Adjustments [Member] | Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance		¥ (1,911)
Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member] | Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance			(3,496)
Defined Benefit Plans [Member] | Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance			(14,543)
Foreign Currency Translation Adjustments [Member] | Consolidation of Certain Variable Interest Entities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance				¥ (1,636)
Foreign Currency Translation Adjustments [Member] | Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance			¥ (526)
[1]	Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019.

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (Before Tax and Net of Tax Changes in Each Component of Accumulated OCI) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Net unrealized gains (losses) on investment securities, Before tax:
Net unrealized gains on investment securities	[1]	¥ 132,723	¥ 631,154	¥ 307,476
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests		(28,953)	(280,258)	(274,278)
Net change		103,770	350,896	33,198
Net unrealized gains (losses) on investment securities, Tax (expense) or benefit:
Net unrealized gains on investment securities	[1]	(24,690)	(204,916)	(107,082)
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests		9,100	84,328	86,845
Net change		(15,590)	(120,588)	(20,237)
Net unrealized gains (losses) on investment securities, Net of tax:
Net unrealized gains on investment securities	[1]	108,033	426,238	200,394
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests		(19,853)	(195,930)	(187,433)
Net change	[1]	88,180	230,308	12,961
Net unrealized gains (losses) on investment securities attributable to noncontrolling interests		27,564	(13,941)	(19,023)
Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group	[1]	60,616	244,249	31,984
Net debt valuation adjustments, Before tax:
Net debt valuation adjustments		13,006	(3,555)	(12,693)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests		1,016	417	215
Net change		14,022	(3,138)	(12,478)
Net debt valuation adjustments, Tax (expense) or benefit:
Net debt valuation adjustments		(3,982)	1,088	3,994
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests		(311)	(128)	(68)
Net change		(4,293)	960	3,926
Net debt valuation adjustments, Net of tax:
Net debt valuation adjustments		9,024	(2,467)	(8,699)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests		705	289	147
Net change		9,729	(2,178)	(8,552)
Net debt valuation adjustments attributable to noncontrolling interests
Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group		9,729	(2,178)	(8,552)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Before tax:
Net unrealized losses on derivatives qualifying for cash flow hedges		(10,397)	(3,430)	(4,321)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		3,662	(8,016)	(18,367)
Net change		(6,735)	(11,446)	(22,688)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Tax (expense) or benefit:
Net unrealized losses on derivatives qualifying for cash flow hedges		2,825	1,571	2,041
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(980)	2,850	7,402
Net change		1,845	4,421	9,443
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Net of tax:
Net unrealized losses on derivatives qualifying for cash flow hedges		(7,572)	(1,859)	(2,280)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		2,682	(5,166)	(10,965)
Net change		(4,890)	(7,025)	(13,245)
Net unrealized gains on derivatives qualifying for cash flow hedges attributable to noncontrolling interests
Net unrealized losses on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group		(4,890)	(7,025)	(13,245)
Defined benefit plans, Before tax:
Defined benefit plans		(126,001)	154,708	131,971
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(1,168)	5,904	20,105
Net change		(127,169)	160,612	152,076
Defined benefit plans, Tax (expense) or benefit:
Defined benefit plans		37,655	(48,537)	(41,852)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		574	(2,237)	(6,652)
Net change		38,229	(50,774)	(48,504)
Defined benefit plans, Net of tax:
Defined benefit plans		(88,346)	106,171	90,119
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(594)	3,667	13,453
Net change		(88,940)	109,838	103,572
Defined benefit plans attributable to noncontrolling interests		(260)	826	212
Defined benefit plans attributable to Mitsubishi UFJ Financial Group		(88,680)	109,012	103,360
Foreign currency translation adjustments, Before tax:
Foreign currency translation adjustments		(18,062)	(137,811)	(148,460)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(9,002)	(1,494)	3,293
Net change		(27,064)	(139,305)	(145,167)
Foreign currency translation adjustments, Tax (expense) or benefit:
Foreign currency translation adjustments		(17,932)	32,767	2,424
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		2,784	1,760	(467)
Net change		(15,148)	34,527	1,957
Foreign currency translation adjustments, Net of tax:
Foreign currency translation adjustments		(35,994)	(105,044)	(146,036)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(6,218)	266	2,826
Net change		(42,212)	(104,778)	(143,210)
Foreign currency translation adjustments attributable to noncontrolling interests		(6,095)	14,435	(5,954)
Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group		(36,117)	(119,213)	(137,256)
Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group		¥ (59,342)	¥ 224,845	¥ (23,709)
[1]	Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019.

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) (Reclassification of Significant Items out of Accumulated OCI) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)-net	[1],[2]	¥ 252,307	¥ (286,903)	[3]	¥ (281,158)	[3]
Equity in earnings of equity method investees-net		(209,732)	(227,984)	[3]	(197,821)	[3]
Interest income on Loans, including fees		(2,576,417)	(2,271,219)		(2,023,649)
Other non-interest income		(103,665)	(63,978)		(63,617)
Other non-interest expenses		(302,687)	(329,314)		(355,172)
Total before tax		(870,842)	(1,661,819)		(272,543)
Income tax expense		133,237	407,823		94,453
Net of tax		(737,605)	(1,253,996)	[3]	(178,090)	[3]
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax		(34,445)	(283,447)		(269,032)
Income tax expense		11,167	86,573		87,060
Net of tax		(23,278)	(196,874)		(181,972)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Gains (Losses) on Investment Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other		(367)	262		19
Total before tax		(28,953)	(280,258)		(274,278)
Income tax expense		9,100	84,328		86,845
Net of tax		(19,853)	(195,930)		(187,433)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Gains (Losses) on Investment Securities [Member] | Net Gains on Sales and Redemptions of Available-for-sale debt Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)-net	[4]	(29,182)	(287,279)		(307,041)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Gains (Losses) on Investment Securities [Member] | Impairment Losses on Investment Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)-net		596	6,759		32,744
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Debt Valuation Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Equity in earnings of equity method investees-net		1,016	417		215
Total before tax		1,016	417		215
Income tax expense		(311)	(128)		(68)
Net of tax		705	289		147
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other		(77)	(234)		(35)
Total before tax		3,662	(8,016)		(18,367)
Income tax expense		(980)	2,850		7,402
Net of tax		2,682	(5,166)		(10,965)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member] | Interest Rate Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on Loans, including fees		3,739	(7,782)		(18,332)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax		(1,168)	5,904		20,105
Income tax expense		574	(2,237)		(6,652)
Net of tax		(594)	3,667		13,453
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plans [Member] | Net actuarial loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	[5]	11,431	17,280		31,837
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plans [Member] | Prior service cost [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	[5]	(6,269)	(6,959)		(9,927)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plans [Member] | Gain on settlements and curtailment, and other [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	[5]	(6,330)	(4,417)		(1,805)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest income		(9,004)	(5,743)		(39)
Other non-interest expenses		2	4,249		3,332
Total before tax		(9,002)	(1,494)		3,293
Income tax expense		2,784	1,760		(467)
Net of tax		¥ (6,218)	¥ 266		¥ 2,826
[1]	New guidance on recognition and measurement of financial assets and financial liabilities requires equity investments to be measured at fair value with changes in fair value recognized in net income for the fiscal year ended March 31, 2019. For additional information, refer to Note 1.
[2]	The following credit losses are included in Investment securities gains (losses)-net: Decline in fair value by ¥706 million, ¥99 million and ¥596 million; Other comprehensive income-net by ¥35 million, ¥15 million and ¥10 million; Total credit losses by ¥741 million, ¥114 million and ¥606 million, for the twelve months ended March 31, 2017, 2018 and 2019, respectively.
[3]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.
[4]	Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019 while included unrealized gains (losses) related to both debt and equity securities for the fiscal years ended March 31, 2017 and 2018.
[5]	These Accumulated OCI components are components of net periodic benefit cost. See Note 13 for more information.

Noncontrolling Interests (Narra

Noncontrolling Interests (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Noncontrolling Interest [Abstract]
Net gains (losses) recognized due to deconsolidation of subsidiaries	¥ 7,228	¥ 4,448	¥ (2,848)

Noncontrolling Interests (Effec

Noncontrolling Interests (Effect on MUFG's Shareholders' Equity from Changes in Ownership of Subsidiaries) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Noncontrolling Interest [Abstract]
Net income attributable to Mitsubishi UFJ Financial Group	¥ 718,645	¥ 1,228,160	¥ 202,680
Transactions between Mitsubishi UFJ Financial Group and the noncontrolling interest shareholders:
Purchase of shares of Mitsubishi UFJ NICOS from noncontrolling interest shareholder (Note 2)		(34,751)
Other	(78)	8,006	(429)
Net transfers to the noncontrolling interest shareholders	(78)	(26,745)	(429)
Change from net income attributable to Mitsubishi UFJ Financial Group and transactions between Mitsubishi UFJ Financial Group and the noncontrolling interest shareholders	¥ 718,567	¥ 1,201,415	¥ 202,251

Regulatory Capital Requiremen_3

Regulatory Capital Requirements (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2015
Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Risk weighted threshold of items not deducted from Common Equity Tier 1 capital	250.00%
FSA's requirements applicable to Japanese banking institutions [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Common Equity Tier 1 capital ratio	4.50%		4.50%
Capital conservation buffer	2.50%		1.875%
G-SIB surcharge	1.50%		1.125%
Countercyclical buffer	0.04%		0.01%
Percentage of G-SIB leverage ratio buffer to G-SIB capital surcharge, effective on January 1, 2022	50.00%
Tier 1 Leverage Ratio	3.00%
U.S. Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Common Equity Tier 1 capital ratio	4.50%
Capital conservation buffer	2.50%
Total minimum Common Equity Tier 1 capital ratio	7.00%
Countercyclical buffer	2.50%
Tier 1 Leverage Ratio	4.00%
Tier 1 Supplementary Leverage Ratio	3.00%
Phase-in period to eliminate the Accumulated OCI or loss exclusion applied under Basel I and Basel II rules	4 years
Capital conservation buffer phase-in arrangements	0.625%
Phase-in period for full implementation of capital conservation buffer	4 years
Basel III for Security Companies in Japan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital ratio required for financial Instruments firms to maintain by Financial Instruments and Exchange Act and related ordinance	120.00%
Minimum capital ratio requirement for financial instruments firms which will call for regulatory reporting	140.00%
Minimum capital ratio requirement for financial instrument firms which may lead to a suspension of all or part of the business for a period of time and cancellation of a registration	100.00%
Mitsubishi UFJ Morgan Stanley Securities [Member] | Basel III for Security Companies in Japan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount of capital accounts less certain fixed assets	¥ 469,272		¥ 473,296
Percentage of capital accounts to the total amounts equivalent to market, counterparty credit and operational risks	332.20%		293.20%
MUAH [Member] | U.S. Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Approximate increase in regulatory capital ratios due to recent regulatory guidance					0.50%
Stand-alone, Mitsubishi UFJ Morgan Stanley Securities [Member] | Basel III for Security Companies in Japan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount of capital accounts less certain fixed assets	¥ 446,609		¥ 446,539
Percentage of capital accounts to the total amounts equivalent to market, counterparty credit and operational risks	331.60%		291.20%
BK (US) [Member] | U.S. Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum total risk-based capital ratio to be categorized as "well capitalized"		10.00%		10.00%
Tier 1 risk-based capital ratio to be categorized as "well capitalized"		8.00%		8.00%
Tier 1 capital to quarterly average assets to be categorized as "well capitalized"		5.00%		5.00%
Common Equity Tier 1 risk-based capital ratio to be categorized as "well capitalized"		6.50%		6.50%

Regulatory Capital Requiremen_4

Regulatory Capital Requirements (Risk-adjusted Capital Amounts and Ratios, Japan) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Consolidated, MUFG [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount	[1]	¥ 18,769,793	¥ 18,795,480
Total capital (to risk-weighted assets): Actual ratio	[1]	16.03%	16.56%
Tier 1 capital (to risk-weighted assets): Actual amount	[1]	¥ 16,276,301	¥ 16,251,749
Tier 1 capital (to risk-weighted assets): Actual ratio	[1]	13.90%	14.32%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount	[1]	¥ 14,322,407	¥ 14,284,945
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio	[1]	12.23%	12.58%
Leverage Ratio: Actual amount	[2]	¥ 16,276,301
Leverage Ratio: Actual ratio	[2]	4.94%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes	[1]	¥ 14,097,771	¥ 12,492,344
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes	[1]	12.04%	11.01%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes	[1]	¥ 11,755,949	¥ 10,223,072
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes	[1]	10.04%	9.01%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes	[1]	¥ 9,999,582	¥ 8,521,118
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes	[1]	8.54%	7.51%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 9,871,460
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%
Consolidated, MUFG [Member] | FSA's requirements applicable to Japanese banking institutions [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes			4.50%
Capital conservation buffer		2.50%	1.875%
G-SIB surcharge		1.50%	1.125%
Countercyclical buffer		0.04%	0.04%
Consolidated, BK [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 14,632,620	¥ 14,470,240
Total capital (to risk-weighted assets): Actual ratio		14.42%	15.90%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 12,639,454	¥ 12,374,074
Tier 1 capital (to risk-weighted assets): Actual ratio		12.46%	13.59%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 10,990,820	¥ 10,788,381
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		10.83%	11.85%
Leverage Ratio: Actual amount	[2]	¥ 12,639,454
Leverage Ratio: Actual ratio	[2]	4.63%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 8,114,105	¥ 7,280,570
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 6,085,579	¥ 5,460,427
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 4,564,184	¥ 4,095,321
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 8,189,494
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%
Consolidated, TB [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 2,213,195	¥ 2,545,648
Total capital (to risk-weighted assets): Actual ratio		24.40%	20.03%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,928,955	¥ 2,245,853
Tier 1 capital (to risk-weighted assets): Actual ratio		21.26%	17.67%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,775,565	¥ 2,060,107
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		19.57%	16.21%
Leverage Ratio: Actual amount	[2]	¥ 1,928,955
Leverage Ratio: Actual ratio	[2]	5.09%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 725,540	¥ 1,016,420
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 544,155	¥ 762,315
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 408,116	¥ 571,736
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 1,135,795
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%
Stand-alone, BK [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 13,560,583	¥ 13,211,327
Total capital (to risk-weighted assets): Actual ratio		15.58%	16.90%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 11,773,839	¥ 11,344,078
Tier 1 capital (to risk-weighted assets): Actual ratio		13.53%	14.51%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 10,172,206	¥ 9,802,445
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		11.69%	12.54%
Leverage Ratio: Actual amount	[2]	¥ 11,773,839
Leverage Ratio: Actual ratio	[2]	4.84%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 6,959,207	¥ 6,252,458
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 5,219,405	¥ 4,689,344
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 3,914,554	¥ 3,517,008
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 7,284,812
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%
Stand-alone, TB [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 2,195,098	¥ 2,529,316
Total capital (to risk-weighted assets): Actual ratio		24.25%	19.88%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,911,237	¥ 2,232,760
Tier 1 capital (to risk-weighted assets): Actual ratio		21.12%	17.55%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,758,237	¥ 2,057,760
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		19.42%	16.18%
Leverage Ratio: Actual amount	[2]	¥ 1,911,237
Leverage Ratio: Actual ratio	[2]	5.55%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 723,953	¥ 1,017,331
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 542,965	¥ 762,998
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 407,224	¥ 572,249
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 1,031,484
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%
[1]	Effective March 31, 2016, the FSA's capital conservation buffer, countercyclical buffer and G-SIB surcharge requirements became applicable to Japanese banking institutions with international operations conducted through foreign offices. As a result, in addition to the 4.50% minimum Common Equity Tier 1 capital ratio, MUFG is required to maintain a capital conservation buffer of 1.875% and a G-SIB surcharge of 1.125% as of March 31, 2018 and a capital conservation buffer of 2.5% and a G-SIB surcharge of 1.5% as of March 31, 2019. As of the same date, the countercyclical buffer applicable to MUFG is 0.04%.
[2]	Effective as of March 31, 2019, the minimum leverage ratio requirement was adopted by the FSA.

Regulatory Capital Requiremen_5

Regulatory Capital Requirements (Risk-adjusted Capital Amounts and Ratios, United States of America, MUAH) (Detail) - MUAH [Member] - U.S. Basel III [Member] - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		$ 14,904	$ 17,106
Tier 1 capital (to risk-weighted assets): Actual amount		14,256	15,708
Tier 1 capital (to quarterly average assets): Actual amount	[1]	14,256	15,708
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		$ 14,256	$ 15,708
Total capital (to risk-weighted assets): Actual ratio		14.60%	17.76%
Tier 1 capital (to risk-weighted assets): Actual ratio		13.96%	16.31%
Tier 1 capital (to quarterly average assets): Actual ratio	[1]	8.77%	10.06%
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		13.96%	16.31%
Total capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 10,081	$ 8,910
Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	8,039	6,984
Tier 1 capital (to quarterly average assets): Amount for minimum capital ratios required	[1],[2]	6,502	6,245
Common Equity Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 6,508	$ 5,539
Total capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	9.875%	9.25%
Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	7.875%	7.25%
Tier 1 capital (to quarterly average assets): Ratio for minimum capital ratios required	[1],[2]	4.00%	4.00%
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	6.375%	5.75%
Capital conservation buffer		1.875%	1.25%
[1]	Excludes certain deductions.
[2]	The minimum capital requirement includes a capital conservation buffer of 1.250% at December 31, 2017 and 1.875% at December 31, 2018.

Regulatory Capital Requiremen_6

Regulatory Capital Requirements (Risk-adjusted Capital Amounts and Ratios, United States of America, MUB) (Detail) - BK (US) [Member] - U.S. Basel III [Member] - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		$ 13,905	$ 15,335
Tier 1 capital (to risk-weighted assets): Actual amount		13,316	14,028
Tier 1 capital (to quarterly average assets): Actual amount	[1]	13,316	14,028
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		$ 13,316	$ 14,028
Total capital (to risk-weighted assets): Actual ratio		15.09%	17.68%
Tier 1 capital (to risk-weighted assets): Actual ratio		14.45%	16.17%
Tier 1 capital (to quarterly average assets): Actual ratio	[1]	10.61%	11.78%
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		14.45%	16.17%
Total capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 9,102	$ 8,023
Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	7,258	6,288
Tier 1 capital (to quarterly average assets): Amount for minimum capital ratios required	[1],[2]	5,018	4,762
Common Equity Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 5,876	$ 4,987
Total capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	9.875%	9.25%
Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	7.875%	7.25%
Tier 1 capital (to quarterly average assets): Ratio for minimum capital ratios required	[1],[2]	4.00%	4.00%
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	6.375%	5.75%
Total capital (to risk-weighted assets): Amount OCC requires to be "well capitalized"		$ 9,217	$ 8,673
Tier 1 capital (to risk-weighted assets): Amount OCC requires to be "well capitalized"		7,374	6,938
Tier 1 capital (to quarterly average assets): Amount OCC requires to be "well capitalized"	[1]	6,273	5,953
Common Equity Tier 1 capital (to risk-weighted assets): Amount OCC requires to be "well capitalized"		$ 5,991	$ 5,637
Total capital (to risk-weighted assets): Ratios OCC requires to be "well capitalized"		10.00%	10.00%
Tier 1 capital (to risk-weighted assets): Ratios OCC requires to be "well capitalized"		8.00%	8.00%
Tier 1 capital (to quarterly average assets): Ratios OCC requires to be "well capitalized"	[1]	5.00%	5.00%
Common Equity Tier 1 capital (to risk-weighted assets): Ratios OCC requires to be "well capitalized"		6.50%	6.50%
Capital conservation buffer		1.875%	1.25%
[1]	Excludes certain deductions.
[2]	Beginning January 1, 2017 and 2018, the minimum capital requirement includes a capital conservation buffer of 1.250% and 1.875%, respectively.

Earnings Per Common Share App_3

Earnings Per Common Share Applicable to Common Shareholders of MUFG (Reconciliations of Net Income and Weighted Average Number of Common Shares Outstanding Used for Computation of Basic EPS to Adjusted Amounts for Computation of Diluted EPS) (Detail) - JPY (¥) ¥ / shares in Units, shares in Thousands, ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income (Numerator):
Net income attributable to Mitsubishi UFJ Financial Group		¥ 718,645	¥ 1,228,160	¥ 202,680
Effect of dilutive instruments:
Stock acquisition rights and restricted stock units-Morgan Stanley		(3,745)	(3,826)	(3,212)
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions		¥ 714,900	¥ 1,224,334	¥ 199,468
Shares (Denominator):
Weighted average common shares outstanding		13,058,698	13,291,842	13,574,314
Effect of dilutive instruments:
Stock acquisition rights and the common shares of MUFG under the Board Incentive Plan	[1]	484	1,650	10,571
Weighted average common shares for diluted computation		13,059,182	13,293,492	13,584,885
Basic earnings per common share:
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group		¥ 55.03	¥ 92.40	¥ 14.93
Diluted earnings per common share:
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group	[1]	¥ 54.74	¥ 92.10	¥ 14.68
[1]	For the fiscal year ended March 31, 2019, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Detail) - JPY (¥) ¥ in Billions		12 Months Ended
		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Cash Flow Hedge:
Derivative, Notional Amount	[1]	¥ 1,656,900		¥ 1,456,500
Credit Derivatives:
Carrying value of credit protection, offsetting with purchased protection with identical underlying referenced entities, in approximate		35		52
Notional amounts of credit protection, offsetting with purchased protection with identical underlying referenced entities, in approximate		2,687		2,416
Credit Risk, Liquidity Risk and Credit-risk-related Contingent Features:
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a liability position, in approximate		600		700
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a liability position, posted collateral, in approximate		85		127
Additional collateral amount which could be requested if the MUFG Group's debt falls below investment grade		84		78
Early termination amount which could be requested if the MUFG Group's debt falls below investment grade		¥ 56		¥ 65
MUAH [Member]
Cash Flow Hedge:
Approximate losses expected to be reclassified to net interest income during the twelve months ending June 30, 2019			¥ 9.8
Fair Value Hedges:
Type of fair value hedging instruments used in interest rate hedging strategy			Interest rate swaps
Objective for interest rate hedging strategy			Mitigated the changes in fair value of the hedged liability caused by changes in the designated benchmark interest rate, LIBOR.
MUAH [Member] | Interest Rate Floor [Member]
Cash Flow Hedge:
Derivative, Description of hedged item			Benchmark interest rate on LIBOR indexed loans
MUAH [Member] | Interest Rate Swap [Member]
Cash Flow Hedge:
Derivative, Description of hedged item			Benchmark interest rate on LIBOR indexed short-term borrowings
MUAH [Member] | Interest Rate Swap [Member] | Maximum [Member]
Fair Value Hedges:
Losses on the hedging instruments			¥ 1		¥ 1
Gains on the hedged liability			¥ 1		¥ 1
MUAH [Member] | Cash Flow Hedging [Member] | Weighted Average [Member]
Cash Flow Hedge:
Remaining life of the active cash flow hedges, in years			2 years 7 months 6 days
MUAH [Member] | Cash Flow Hedging [Member] | Interest Rate Floor [Member]
Cash Flow Hedge:
Derivative, Notional Amount			¥ 55.5
MUAH [Member] | Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Cash Flow Hedge:
Derivative, Notional Amount			¥ 19.3
[1]	Includes both written and purchased positions.

Derivative Financial Instrume_4

Derivative Financial Instruments (Notional Amounts of Derivative Contracts) (Detail) - JPY (¥) ¥ in Trillions		Mar. 31, 2019	Mar. 31, 2018
Derivative [Line Items]
Notional amounts of derivatives	[1]	¥ 1,656.9	¥ 1,456.5
Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	1,409.6	1,219.7
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	230.5	220.8
Equity Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	6.4	6.1
Commodity Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	0.2	0.3
Credit Derivatives [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	7.2	6.5
Others [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	¥ 3	¥ 3.1
[1]	Includes both written and purchased positions.

Derivative Financial Instrume_5

Derivative Financial Instruments (Fair Value Information on Derivative Instruments Recorded on Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Billions		Mar. 31, 2019	Mar. 31, 2018
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	¥ 13,205	¥ 12,585
Fair value of derivative liabilities	[1],[2],[3]	12,710	11,877
Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	10,109	8,712
Fair value of derivative liabilities	[1],[2],[3]	9,896	8,691
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	2,795	3,557
Fair value of derivative liabilities	[1],[2],[3]	2,671	3,000
Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	188	207
Fair value of derivative liabilities	[1],[2],[3]	183	227
Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	27	35
Fair value of derivative liabilities	[1],[2],[3]	27	33
Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	84	72
Fair value of derivative liabilities	[1],[2],[3]	69	71
Others [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	2	2
Fair value of derivative liabilities	[1],[2],[3],[4]	(136)	(145)
Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	13,204	12,585
Fair value of derivative liabilities	[1],[2],[5]	12,710	11,860
Not Designated as Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	10,108	8,712
Fair value of derivative liabilities	[1],[2],[5]	9,896	8,674
Not Designated as Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	2,795	3,557
Fair value of derivative liabilities	[1],[2],[5]	2,671	3,000
Not Designated as Hedging Instruments [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	188	207
Fair value of derivative liabilities	[1],[2],[5]	183	227
Not Designated as Hedging Instruments [Member] | Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	27	35
Fair value of derivative liabilities	[1],[2],[5]	27	33
Not Designated as Hedging Instruments [Member] | Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	84	72
Fair value of derivative liabilities	[1],[2],[5]	69	71
Not Designated as Hedging Instruments [Member] | Others [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	2	2
Fair value of derivative liabilities	[1],[2],[4],[5]	(136)	(145)
Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]	1
Fair value of derivative liabilities	[1],[2],[6]		17
Designated as Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]	1
Fair value of derivative liabilities	[1],[2],[6]		17
Designated as Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] | Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] | Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] | Others [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[4],[6]
[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 32.
[2]	The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts.
[3]	This table does not include contracts with embedded derivatives for which the fair value option has been elected.
[4]	Others include mainly bifurcated embedded derivatives carried at fair value, which are presented in Deposits and Long-term debt.
[5]	The derivative instruments which are not designated as a hedging instrument are held for trading and risk management purposes, and are presented in Trading account assets/liabilities except for (6).
[6]	The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by MUFG Americas Holdings. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying consolidated balance sheets.

Derivative Financial Instrume_6

Derivative Financial Instruments (Gains and Losses for Trading and Risk Management Derivatives (Not Designated as Hedging Instruments)) (Detail) - JPY (¥) ¥ in Billions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (378)	¥ (387)	¥ (508)
Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	6	51	(137)
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(347)	(163)	(183)
Equity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	80	(260)	(153)
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)		6	2
Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(40)	(2)	18
Others [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(77)	(19)	(55)
Foreign Exchange Gains (Losses)-Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(354)	(160)	(183)
Foreign Exchange Gains (Losses)-Net [Member] | Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)-Net [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(347)	(163)	(183)
Foreign Exchange Gains (Losses)-Net [Member] | Equity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)-Net [Member] | Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)-Net [Member] | Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)-Net [Member] | Others [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(7)	3
Trading Account Profits (Losses)-Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(24)	(227)	(325)
Trading Account Profits (Losses)-Net [Member] | Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	6	51	(137)
Trading Account Profits (Losses)-Net [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Trading Account Profits (Losses)-Net [Member] | Equity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	80	(260)	(153)
Trading Account Profits (Losses)-Net [Member] | Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)		6	2
Trading Account Profits (Losses)-Net [Member] | Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(40)	(2)	18
Trading Account Profits (Losses)-Net [Member] | Others [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (70)	¥ (22)	¥ (55)

Derivative Financial Instrume_7

Derivative Financial Instruments (Gains and Losses for Derivatives Designated as Cash Flow Hedges) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in Accumulated OCI on derivative instruments (Effective portion)		¥ (10,397)	¥ (3,430)	¥ (4,321)
Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in Accumulated OCI on derivative instruments (Effective portion)		(11,000)	(4,000)	(3,000)
Gains (losses) reclassified from Accumulated OCI into income (Effective portion)		(4,000)	8,000	18,000
Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in Accumulated OCI on derivative instruments (Effective portion)		(11,000)	(4,000)	(3,000)
Gains (losses) reclassified from Accumulated OCI into income (Effective portion)	[1]	¥ (4,000)	¥ 8,000	¥ 18,000
[1]	Included in Interest income.

Derivative Financial Instrume_8

Derivative Financial Instruments (Protection Sold Through Credit Default Swaps) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		¥ 590,984	¥ 688,151
Maximum potential/Notional amount, Expiring in 1-5 years		2,470,694	2,177,736
Maximum potential/Notional amount, Expiring over 5 years		162,805	135,513
Maximum potential/Notional amount, Total		3,224,483	3,001,400
Credit derivative (asset) liability at fair value	[1]	(40,085)	(61,212)
Protection sold [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		513,291	688,151
Maximum potential/Notional amount, Expiring in 1-5 years		2,470,694	2,103,368
Maximum potential/Notional amount, Expiring over 5 years		162,805	135,513
Maximum potential/Notional amount, Total		3,146,790	2,927,032
Credit derivative (asset) liability at fair value	[1]	(39,465)	(61,188)
Protection sold [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		491,428	608,712
Maximum potential/Notional amount, Expiring in 1-5 years		1,847,389	1,504,191
Maximum potential/Notional amount, Expiring over 5 years		151,361	89,869
Maximum potential/Notional amount, Total		2,490,178	2,202,772
Credit derivative (asset) liability at fair value	[1]	(30,477)	(36,812)
Protection sold [Member] | Single Name Credit Default Swaps [Member] | Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less	[2]	378,527	440,610
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	1,603,962	1,199,269
Maximum potential/Notional amount, Expiring over 5 years	[2]	145,689	85,094
Maximum potential/Notional amount, Total	[2]	2,128,178	1,724,973
Credit derivative (asset) liability at fair value	[1],[2]	(30,303)	(33,389)
Protection sold [Member] | Single Name Credit Default Swaps [Member] | Non-investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		112,901	168,102
Maximum potential/Notional amount, Expiring in 1-5 years		238,330	259,497
Maximum potential/Notional amount, Expiring over 5 years		5,672	4,775
Maximum potential/Notional amount, Total		356,903	432,374
Credit derivative (asset) liability at fair value	[1]	(127)	(3,431)
Protection sold [Member] | Single Name Credit Default Swaps [Member] | Not Rated [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less
Maximum potential/Notional amount, Expiring in 1-5 years		5,097	45,425
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total		5,097	45,425
Credit derivative (asset) liability at fair value	[1]	(47)	8
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		21,863	79,439
Maximum potential/Notional amount, Expiring in 1-5 years		623,305	599,177
Maximum potential/Notional amount, Expiring over 5 years		11,444	45,644
Maximum potential/Notional amount, Total		656,612	724,260
Credit derivative (asset) liability at fair value	[1]	(8,988)	(24,376)
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member] | BK [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less			10,000
Maximum potential/Notional amount, Expiring in 1-5 years		221,855	201,226
Maximum potential/Notional amount, Expiring over 5 years			37,781
Maximum potential/Notional amount, Total		221,855	249,007
Credit derivative (asset) liability at fair value	[1]	(2,092)	(4,692)
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member] | BK [Member] | Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less	[2]		3,000
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	120,854	118,359
Maximum potential/Notional amount, Expiring over 5 years	[2]		37,781
Maximum potential/Notional amount, Total	[2]	120,854	159,140
Credit derivative (asset) liability at fair value	[1],[2]	(82)	(3,381)
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member] | BK [Member] | Non-investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less			7,000
Maximum potential/Notional amount, Expiring in 1-5 years		101,001	82,867
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total		101,001	89,867
Credit derivative (asset) liability at fair value	[1]	(2,010)	(1,311)
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member] | SCHD [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		21,863	69,439
Maximum potential/Notional amount, Expiring in 1-5 years		401,450	397,951
Maximum potential/Notional amount, Expiring over 5 years		11,444	7,863
Maximum potential/Notional amount, Total		434,757	475,253
Credit derivative (asset) liability at fair value	[1]	(6,896)	(19,684)
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member] | SCHD [Member] | Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less	[2]	13,000	15,000
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	194,618	108,000
Maximum potential/Notional amount, Expiring over 5 years	[2]	8,000	6,000
Maximum potential/Notional amount, Total	[2]	215,618	129,000
Credit derivative (asset) liability at fair value	[1],[2]	(3,853)	(2,641)
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member] | SCHD [Member] | Non-investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less			12,000
Maximum potential/Notional amount, Expiring in 1-5 years			29,000
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total			41,000
Credit derivative (asset) liability at fair value	[1]		(749)
Protection sold [Member] | Index and Basket Credit Default Swaps Sold [Member] | SCHD [Member] | Not Rated [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		8,863	42,439
Maximum potential/Notional amount, Expiring in 1-5 years		206,832	260,951
Maximum potential/Notional amount, Expiring over 5 years		3,444	1,863
Maximum potential/Notional amount, Total		219,139	305,253
Credit derivative (asset) liability at fair value	[1]	(3,043)	(16,294)
Other Credit Derivatives Sold [Member] | Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less	[3]	77,693
Maximum potential/Notional amount, Expiring in 1-5 years	[3]		74,368
Maximum potential/Notional amount, Expiring over 5 years	[3]
Maximum potential/Notional amount, Total	[3]	77,693	74,368
Credit derivative (asset) liability at fair value	[1],[3]	¥ (620)	¥ (24)
[1]	Fair value amounts are shown on a gross basis prior to cash collateral or counterparty netting.
[2]	The MUFG Group considers ratings of Baa3/BBB- or higher to meet the definition of investment grade.
[3]	Other credit derivatives primarily consist of total return swaps.

Obligations under Guarantees _3

Obligations under Guarantees and Other Off-balance Sheet Instruments (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	¥ 76,755,000	¥ 57,341,000
Contractual maturities of guarantees mainly comprised of guarantees of housing loans, in years	Over 5 years
Carrying amounts of the liabilities related to guarantees and similar instruments	¥ 1,051,297	1,110,505
Allowance for off-balance sheet instruments	¥ 96,946	31,101
Lending-related commitments which expire within one year, in approximate percentage	64.00%
Lending-related commitments which expire from one year to five years, in approximate percentage	33.00%
Lending-related commitments which expire after five years, in approximate percentage	3.00%
Portion Syndicated out to Third Parties [Member]
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	¥ 468,900	403,200
Segregated Records of Trust Accounts [Member]
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	11,520,000	9,444,000
Options Sold [Member]
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	¥ 1,005,951	¥ 1,069,156

Obligations under Guarantees _4

Obligations under Guarantees and Other Off-balance Sheet Instruments (Contractual or Notional Amounts of Guarantees with Amount by Expiration Period) (Detail) - JPY (¥) ¥ in Billions		Mar. 31, 2019	Mar. 31, 2018
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		¥ 76,755	¥ 57,341
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		40,754	26,508
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		22,976	20,527
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		13,025	10,306
Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		3,901	4,311
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		2,792	3,115
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		838	850
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		271	346
Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		3,256	3,051
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		2,332	2,144
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		784	801
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		140	106
Derivative Instruments [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total	[1]	58,025	40,513
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less	[1]	29,734	15,230
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years	[1]	20,921	18,314
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years	[1]	7,370	6,969
Liabilities of Trust Accounts [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		11,520	9,444
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		5,884	6,017
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		420	558
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		5,216	2,869
Others [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		53	22
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		12	2
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		13	4
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		¥ 28	¥ 16
[1]	Credit derivatives sold by the MUFG Group are excluded from this presentation.

Obligations under Guarantees _5

Obligations under Guarantees and Other Off-balance Sheet Instruments (Maximum Potential Amount of Future Payments Classified Based upon Internal Credit Ratings) (Detail) - JPY (¥) ¥ in Billions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		¥ 76,755	¥ 57,341
Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,901	4,311
Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,256	3,051
Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		7,157	7,362
Standby Letters of Credit, Financial and Performance Guarantees [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,901	4,311
Standby Letters of Credit, Financial and Performance Guarantees [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,256	3,051
Normal [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		6,849	7,121
Normal [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,779	4,211
Normal [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		¥ 3,070	¥ 2,910
Close Watch [Member] | Minimum [Member]
Guarantor Obligations [Line Items]
Accruing loans contractually past due, in day		90 days	90 days
Close Watch [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	¥ 177	¥ 196
Close Watch [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	98	83
Close Watch [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	79	113
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[2]	99	18
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[2]	21	13
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[2]	78	5
Not Rated [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		32	27
Not Rated [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3	4
Not Rated [Member] | Standby Letters of Credit, Financial and Performance Guarantees [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		¥ 29	¥ 23
[1]	Borrowers classified as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower's loans are TDRs or loans contractually past due 90 days or more for special reasons.
[2]	Borrowers classified as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment, suspension of business, voluntary liquidation or filing for legal liquidation.

Obligations under Guarantees _6

Obligations under Guarantees and Other Off-balance Sheet Instruments (Contractual Amounts with Regard to Other Off-balance Sheet Instruments) (Detail) - JPY (¥) ¥ in Billions	Mar. 31, 2019	Mar. 31, 2018
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 77,273	¥ 80,090
Commercial Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	1,057	1,191
Commitments to Make Investments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	240	183
Other [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 5	¥ 13

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Detail) - Consolidation and Deconsolidation of Certain Investment Funds [Member] ¥ in Millions	Apr. 01, 2016JPY (¥)
Variable Interest Entity [Line Items]
Net increase in the consolidated assets	¥ 628,236
Net increase in the consolidated liabilities	32,254
Noncontrolling Interests [Member]
Variable Interest Entity [Line Items]
Cumulative effect of change on Equity	595,982
Mitsubishi UFJ Financial Group Shareholders' Equity [Member] | Unappropriated Retained Earnings [Member]
Variable Interest Entity [Line Items]
Cumulative effect of change on Equity	¥ (3,873)

Variable Interest Entities (Ass

Variable Interest Entities (Assets and Liabilities of Consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Variable Interest Entity [Line Items]
Total assets	¥ 305,228,899	¥ 300,570,312	¥ 297,185,019
Consolidated assets, Cash and due from banks	33,924,340	32,648,387
Consolidated assets, Interest-earning deposits in other banks	40,646,920	43,209,662
Consolidated assets, Trading account assets	40,576,618	35,186,689
Consolidated assets, Investment securities	44,938,004	43,654,249
Consolidated assets, Loans	116,225,757	116,271,771
Total liabilities	289,244,151	284,924,497
Consolidated liabilities, Deposits	199,280,789	195,674,593
Consolidated liabilities, Other short-term borrowings	6,731,073	6,881,124
Consolidated liabilities, Long-term debt	27,990,543	27,069,556
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total assets	18,220,086	19,190,993
Consolidated assets, Cash and due from banks	7	130
Consolidated assets, Interest-earning deposits in other banks	23,655	23,161
Consolidated assets, Trading account assets	528,690	477,583
Consolidated assets, Investment securities	1,828,194	1,952,683
Consolidated assets, Loans	15,545,328	16,550,107
Consolidated assets, All other assets	294,212	187,329
Total liabilities	572,714	623,439
Consolidated liabilities, Deposits
Consolidated liabilities, Other short-term borrowings	20,535	28,451
Consolidated liabilities, Long-term debt	490,033	510,948
Consolidated liabilities, All other liabilities	62,146	84,040
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member]
Variable Interest Entity [Line Items]
Total assets	25,992,862	26,414,149
Consolidated assets, Cash and due from banks	93,178	53,584
Consolidated assets, Interest-earning deposits in other banks	53,016	82,311
Consolidated assets, Trading account assets	533,792	481,387
Consolidated assets, Investment securities	1,891,525	2,041,441
Consolidated assets, Loans	23,097,643	23,546,424
Consolidated assets, All other assets	323,708	209,002
Total liabilities	25,171,410	25,716,760
Consolidated liabilities, Deposits	7,616,575	7,103,738
Consolidated liabilities, Other short-term borrowings	4,735,822	5,220,328
Consolidated liabilities, Long-term debt	12,007,173	12,760,168
Consolidated liabilities, All other liabilities	811,840	632,526
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Asset-backed Conduits [Member]
Variable Interest Entity [Line Items]
Total assets	6,698,146	7,390,029
Consolidated assets, Cash and due from banks	92,310	52,703
Consolidated assets, Interest-earning deposits in other banks	26,101	44,902
Consolidated assets, Trading account assets	3,005	2,273
Consolidated assets, Investment securities	1,424,444	1,777,017
Consolidated assets, Loans	5,124,462	5,502,892
Consolidated assets, All other assets	27,824	10,242
Total liabilities	6,691,362	7,409,190
Consolidated liabilities, Other short-term borrowings	4,678,588	5,176,663
Consolidated liabilities, Long-term debt	1,552,572	1,708,354
Consolidated liabilities, All other liabilities	460,202	524,173
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Total assets	680,922	598,662
Consolidated assets, Interest-earning deposits in other banks	14,113	10,300
Consolidated assets, Trading account assets	477,239	461,036
Consolidated assets, Investment securities	18,118	19,895
Consolidated assets, All other assets	171,452	107,431
Total liabilities	6,852	11,735
Consolidated liabilities, Long-term debt	5,158
Consolidated liabilities, All other liabilities	1,694	11,735
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Special Purpose Entities Created for Structured Financing [Member]
Variable Interest Entity [Line Items]
Total assets	203,458	198,484
Consolidated assets, Interest-earning deposits in other banks	2,214	2,332
Consolidated assets, Loans	127,243	149,194
Consolidated assets, All other assets	74,001	46,958
Total liabilities	114,469	115,353
Consolidated liabilities, Other short-term borrowings	609	587
Consolidated liabilities, Long-term debt	111,523	112,054
Consolidated liabilities, All other liabilities	2,337	2,712
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Repackaged Instruments [Member]
Variable Interest Entity [Line Items]
Total assets	279,327	152,781
Consolidated assets, Cash and due from banks	506	520
Consolidated assets, Trading account assets	53,346	17,376
Consolidated assets, Investment securities	137,509	92,210
Consolidated assets, Loans	86,753	42,632
Consolidated assets, All other assets	1,213	43
Total liabilities	277,179	148,928
Consolidated liabilities, Other short-term borrowings	48,014	12,676
Consolidated liabilities, Long-term debt	174,215	132,012
Consolidated liabilities, All other liabilities	54,950	4,240
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Securitization of MUFG Group's Assets [Member]
Variable Interest Entity [Line Items]
Total assets	10,208,496	10,852,539
Consolidated assets, Loans	10,183,624	10,827,488
Consolidated assets, All other assets	24,872	25,051
Total liabilities	10,167,632	10,816,672
Consolidated liabilities, Other short-term borrowings		5,000
Consolidated liabilities, Long-term debt	10,162,231	10,806,145
Consolidated liabilities, All other liabilities	5,401	5,527
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Trust Arrangements [Member]
Variable Interest Entity [Line Items]
Total assets	7,888,210	7,177,407
Consolidated assets, Interest-earning deposits in other banks	8,953	10,541
Consolidated assets, Trading account assets	202	702
Consolidated assets, Investment securities	311,412	152,277
Consolidated assets, Loans	7,565,862	7,011,255
Consolidated assets, All other assets	1,781	2,632
Total liabilities	7,881,332	7,171,852
Consolidated liabilities, Deposits	7,616,575	7,103,738
Consolidated liabilities, Other short-term borrowings		655
Consolidated liabilities, All other liabilities	264,757	67,459
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Others [Member]
Variable Interest Entity [Line Items]
Total assets	34,303	44,247
Consolidated assets, Cash and due from banks	362	361
Consolidated assets, Interest-earning deposits in other banks	1,635	14,236
Consolidated assets, Investment securities	42	42
Consolidated assets, Loans	9,699	12,963
Consolidated assets, All other assets	22,565	16,645
Total liabilities	32,584	43,030
Consolidated liabilities, Other short-term borrowings	8,611	24,747
Consolidated liabilities, Long-term debt	1,474	1,603
Consolidated liabilities, All other liabilities	22,499	16,680
Consolidated VIEs [Member] | Amounts Eliminated in Consolidation [Member]
Variable Interest Entity [Line Items]
Total assets	(7,772,776)	(7,223,156)
Consolidated assets, Cash and due from banks	(93,171)	(53,454)
Consolidated assets, Interest-earning deposits in other banks	(29,361)	(59,150)
Consolidated assets, Trading account assets	(5,102)	(3,804)
Consolidated assets, Investment securities	(63,331)	(88,758)
Consolidated assets, Loans	(7,552,315)	(6,996,317)
Consolidated assets, All other assets	(29,496)	(21,673)
Total liabilities	(14,676,389)	(15,347,991)
Consolidated liabilities, Deposits	(50,396)
Consolidated liabilities, Other short-term borrowings	(2,996,041)	(3,028,987)
Consolidated liabilities, Long-term debt	(11,517,019)	(12,248,680)
Consolidated liabilities, All other liabilities	(112,933)	(70,324)
Consolidated VIEs [Member] | Amount of Liabilities with Recourse to General Credit of MUFG Group [Member]
Variable Interest Entity [Line Items]
Total liabilities	(9,922,307)	(9,745,330)
Consolidated liabilities, Deposits	(7,566,179)	(7,103,738)
Consolidated liabilities, Other short-term borrowings	(1,719,246)	(2,162,890)
Consolidated liabilities, Long-term debt	(121)	(540)
Consolidated liabilities, All other liabilities	¥ (636,761)	¥ (478,162)

Variable Interest Entities (A_2

Variable Interest Entities (Assets and Liabilities of Non-consolidated Variable Interest Entities) (Detail) - Non-consolidated VIEs [Member] - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Variable Interest Entity [Line Items]
Total assets	¥ 213,008,709	¥ 169,334,856
Maximum exposure	19,106,098	17,851,986
On-balance sheet assets, Total assets	15,589,741	14,592,351
On-balance sheet assets, Trading account assets	1,254,322	1,378,375
On-balance sheet assets, Investment securities	5,242,402	4,032,522
On-balance sheet assets, Loans	8,914,380	8,933,460
On-balance sheet assets, All other assets	178,637	247,994
On-balance sheet liabilities, Total liabilities	73,687	49,966
On-balance sheet liabilities, All other liabilities	73,687	49,966
Asset-backed Conduits [Member]
Variable Interest Entity [Line Items]
Total assets	29,621,609	29,011,749
Maximum exposure	6,221,274	5,721,627
On-balance sheet assets, Total assets	4,982,357	4,645,697
On-balance sheet assets, Trading account assets	659	620
On-balance sheet assets, Investment securities	1,704,553	1,541,591
On-balance sheet assets, Loans	3,277,145	3,103,486
Investment Funds [Member]
Variable Interest Entity [Line Items]
Total assets	67,750,419	45,090,381
Maximum exposure	1,952,676	1,776,366
On-balance sheet assets, Total assets	1,753,823	1,525,127
On-balance sheet assets, Trading account assets	187,166	213,722
On-balance sheet assets, Investment securities	1,253,705	891,062
On-balance sheet assets, Loans	304,310	413,855
On-balance sheet assets, All other assets	8,642	6,488
On-balance sheet liabilities, Total liabilities	206	17,919
On-balance sheet liabilities, All other liabilities	206	17,919
Special Purpose Entities Created for Structured Financing [Member]
Variable Interest Entity [Line Items]
Total assets	42,676,571	35,437,349
Maximum exposure	3,972,450	4,016,999
On-balance sheet assets, Total assets	3,015,593	3,193,621
On-balance sheet assets, Trading account assets	252,597	309,560
On-balance sheet assets, Investment securities	48,895	116,961
On-balance sheet assets, Loans	2,709,008	2,697,126
On-balance sheet assets, All other assets	5,093	69,974
On-balance sheet liabilities, Total liabilities	9,827	7,217
On-balance sheet liabilities, All other liabilities	9,827	7,217
Repackaged Instruments [Member]
Variable Interest Entity [Line Items]
Total assets	12,885,367	10,212,933
Maximum exposure	3,477,545	2,576,619
On-balance sheet assets, Total assets	3,383,161	2,487,377
On-balance sheet assets, Trading account assets	690,305	759,591
On-balance sheet assets, Investment securities	2,169,798	1,421,716
On-balance sheet assets, Loans	478,252	236,852
On-balance sheet assets, All other assets	44,806	69,218
On-balance sheet liabilities, Total liabilities	6,087
On-balance sheet liabilities, All other liabilities	6,087
Others [Member]
Variable Interest Entity [Line Items]
Total assets	60,074,743	49,582,444
Maximum exposure	3,482,153	3,760,375
On-balance sheet assets, Total assets	2,454,807	2,740,529
On-balance sheet assets, Trading account assets	123,595	94,882
On-balance sheet assets, Investment securities	65,451	61,192
On-balance sheet assets, Loans	2,145,665	2,482,141
On-balance sheet assets, All other assets	120,096	102,314
On-balance sheet liabilities, Total liabilities	57,567	24,830
On-balance sheet liabilities, All other liabilities	¥ 57,567	¥ 24,830

Commitments and Contingent Li_3

Commitments and Contingent Liabilities (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Commitments and Contingent Liabilities [Line Items]
Fiscal year in which lease under noncancelable agreements expire	2048
Rental expense	¥ 116,525	¥ 119,208	¥ 113,649
Limit on aggregate credit extensions over the borrower's annual income	33.333%
Allowance for repayment of excess interest	¥ 24,983	23,724
Provision (reversal) for repayment of excess interest recognized on Equity in earnings of equity method investee	¥ 15,632		¥ 56,911
Maximum [Member]
Commitments and Contingent Liabilities [Line Items]
Previous permissible interest rate under the Japanese Act Regulating the Receipt of Contributions, the Receipt of Deposits, and Interest Rates	29.20%
Current permissible interest rate under the Japanese Act Regulating the Receipt of Contributions, the Receipt of Deposits, and Interest Rates	20.00%
Interest rate under the Interest Rate Restriction Act previously subject to gray-zone interest rates	20.00%
Minimum [Member]
Commitments and Contingent Liabilities [Line Items]
Interest rate under the Interest Rate Restriction Act previously subject to gray-zone interest rates	15.00%

Commitments and Contingent Li_4

Commitments and Contingent Liabilities (Future Minimum Rental Commitments for Noncancelable Leases) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Capital leases:
Fiscal year ending March 31, 2020	¥ 6,573
Fiscal year ending March 31, 2021	5,957
Fiscal year ending March 31, 2022	4,739
Fiscal year ending March 31, 2023	3,287
Fiscal year ending March 31, 2024	1,672
Fiscal year ending March 31, 2025 and thereafter	3,104
Total minimum lease payments	25,332
Amount representing interest	(2,797)
Present value of minimum lease payments	22,535
Operating leases:
Fiscal year ending March 31, 2020	94,422
Fiscal year ending March 31, 2021	81,431
Fiscal year ending March 31, 2022	68,416
Fiscal year ending March 31, 2023	56,471
Fiscal year ending March 31, 2024	50,571
Fiscal year ending March 31, 2025 and thereafter	271,031
Total minimum lease payments	¥ 622,342

Fees and Commissions Income (Na

Fees and Commissions Income (Narrative) (Detail) ¥ in Billions	Mar. 31, 2019JPY (¥)
Fees and Commissions Income [Abstract]
Receivables from contracts with customers included primarily in Other assets	¥ 185
Contract liabilities included primarily in Other liabilities	¥ 8

Fees and Commissions Income (De

Fees and Commissions Income (Details of Fees and Commissions Income) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		¥ 1,438,578	¥ 1,462,792	¥ 1,414,893
Deposits [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		52,624	53,483	53,891
Remittances and Transfers [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		168,756	169,300	168,571
Foreign Trading Business [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		73,176	78,239	75,024
Credit card business [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		225,877	212,515	198,145
Security-related Services [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		233,448	258,728	239,516
Administration and management services for investment funds [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		147,597	159,481	155,708
Trust fees [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		115,002	112,399	103,110
Guarantee fees [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	[1]	44,962	44,160	41,818
Insurance Commissions [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		46,918	49,223	59,853
Real Estate [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		45,160	40,573	39,808
Others [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	[2]	¥ 285,058	¥ 284,691	¥ 279,449
[1]	Guarantee fees are not within the scope of the guidance on revenue from contracts with customers.
[2]	Other fees and commissions include non-refundable financing related fees that are not within the scope of the guidance on revenue from contracts with customers.

Trading Account Profits and L_3

Trading Account Profits and Losses (Net Trading Gains (Losses)) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Trading Account Profits And Losses [Abstract]
Interest rate and other derivative contracts		¥ (24,031)	¥ (226,788)	¥ (325,007)
Trading account securities, excluding derivatives		192,931	153,674	(314,177)
Trading account profits (losses)-net		168,900	(73,114)	(639,184)
Foreign exchange derivative contracts	[1]	(354,401)	(159,986)	(183,159)
Net trading losses		¥ (185,501)	¥ (233,100)	¥ (822,343)
[1]	Losses on foreign exchange derivative contracts are included in Foreign exchange losses-net in the accompanying consolidated statements of income. Foreign exchange losses-net in the accompanying consolidated statements of income are also comprised of foreign exchange gains other than derivative contracts and foreign exchange losses related to the fair value option.

Business Segments (Financial In

Business Segments (Financial Information by Business Segment) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Business segment information
Net revenue	[1]	¥ 3,812,400	¥ 3,918,100	¥ 4,061,800
Net interest income		2,295,398	2,230,261	2,221,128
Operating expenses	[1]	2,740,100	2,717,500	2,690,300
Operating profit (loss)	[1]	1,072,300	1,200,600	1,371,500
Modification Impact [Member] | Internal Management Accounting Rules And Practices [Member]
Business segment information
Operating profit (loss)			(23,500)	(24,300)
BK and TB [Member]
Business segment information
Net revenue	[1],[2]	1,861,000	2,029,900	2,190,500
Net interest income	[1]	1,145,200	1,119,700	1,221,800
Net fees	[1]	620,900	667,200	688,600
Other	[1]	94,900	243,000	280,100
Other than BK and TB [Member]
Business segment information
Net revenue	[1]	1,951,400	1,888,200	1,871,300
Business Segment [Member] | Customer Business [Member]
Business segment information
Net revenue		3,372,700	3,342,200	3,318,700
Operating expenses		2,372,700	2,349,000	2,310,600
Operating profit (loss)		1,000,000	993,200	1,008,100
Business Segment [Member] | Customer Business [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	1,518,600	1,552,300	1,610,400
Net interest income		724,700	708,300	731,400
Net fees		702,600	758,500	795,600
Other		91,300	85,500	83,400
Business Segment [Member] | Customer Business [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		1,854,100	1,789,900	1,708,300
Business Segment [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member]
Business segment information
Net revenue		1,521,600	1,584,300	1,568,000
Operating expenses		1,222,800	1,227,600	1,234,100
Operating profit (loss)		298,800	356,700	333,900
Business Segment [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	738,600	785,900	817,000
Net interest income		460,400	465,800	482,000
Net fees		243,900	288,400	300,600
Other		34,300	31,700	34,400
Business Segment [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		783,000	798,400	751,000
Business Segment [Member] | Customer Business [Member] | Japanese Corporate & Investment Banking Business Group [Member]
Business segment information
Net revenue		541,500	522,600	527,100
Operating expenses		291,800	295,600	290,000
Operating profit (loss)		249,700	227,000	237,100
Business Segment [Member] | Customer Business [Member] | Japanese Corporate & Investment Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	421,600	439,800	446,900
Net interest income		152,100	150,700	143,800
Net fees		213,100	233,200	245,000
Other		56,400	55,900	58,100
Business Segment [Member] | Customer Business [Member] | Japanese Corporate & Investment Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		119,900	82,800	80,200
Business Segment [Member] | Customer Business [Member] | Global Corporate & Investment Banking Business Group [Member]
Business segment information
Net revenue		399,700	378,600	418,300
Operating expenses		247,000	242,800	236,000
Operating profit (loss)		152,700	135,800	182,300
Business Segment [Member] | Customer Business [Member] | Global Corporate & Investment Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	266,600	246,300	275,600
Net interest income		113,600	95,200	107,300
Net fees		152,400	153,100	177,300
Other		600	(2,000)	(9,000)
Business Segment [Member] | Customer Business [Member] | Global Corporate & Investment Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		133,100	132,300	142,700
Business Segment [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member]
Business segment information
Net revenue		706,900	666,300	628,600
Operating expenses		486,500	463,600	435,800
Operating profit (loss)		220,400	202,700	192,800
Business Segment [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	(1,400)	(3,500)	(1,800)
Net interest income		(1,400)	(3,400)	(1,700)
Other			(100)	(100)
Business Segment [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		708,300	669,800	630,400
Business Segment [Member] | Customer Business [Member] | Asset Management & Investor Services Business Group [Member]
Business segment information
Net revenue		203,000	190,400	176,700
Operating expenses		124,600	119,400	114,700
Operating profit (loss)		78,400	71,000	62,000
Business Segment [Member] | Customer Business [Member] | Asset Management & Investor Services Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	93,200	83,800	72,700
Net fees		93,200	83,800	72,700
Business Segment [Member] | Customer Business [Member] | Asset Management & Investor Services Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		109,800	106,600	104,000
Business Segment [Member] | Global Markets Business Group [Member]
Business segment information
Net revenue		472,500	565,200	686,800
Operating expenses		221,300	225,700	217,400
Operating profit (loss)		251,200	339,500	469,400
Business Segment [Member] | Global Markets Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	303,900	368,600	491,500
Net interest income		183,100	182,000	291,000
Net fees		(14,200)	(12,200)	(8,200)
Other		135,000	198,800	208,700
Business Segment [Member] | Global Markets Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		168,600	196,600	195,300
Business Segment, Other [Member]
Business segment information
Net revenue		(32,800)	10,700	56,300
Operating expenses		146,100	142,800	162,300
Operating profit (loss)		(178,900)	(132,100)	(106,000)
Business Segment, Other [Member] | BK and TB [Member]
Business segment information
Net revenue	[2]	38,500	109,000	88,600
Net interest income		237,400	229,400	199,400
Net fees		(67,500)	(79,100)	(98,800)
Other		(131,400)	(41,300)	(12,000)
Business Segment, Other [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		¥ (71,300)	¥ (98,300)	¥ (32,300)
[1]	Prior period business segment information has been restated to reflect the transfer of corporate loan-related businesses of Mitsubishi UFJ Trust and Banking to MUFG Bank. In accordance with internal management accounting rules and practices, the transfer resulted in a decrease of the total operating profit by ¥24.3 billion and ¥23.5 billion for fiscal years ended March 31, 2017 and 2018, respectively.
[2]	"BK and TB" is a sum of MUFG Bank on a stand-alone basis and Mitsubishi UFJ Trust and Banking on a stand-alone basis.

Business Segments (Reconciliati

Business Segments (Reconciliation of Operating Profit (Loss) from Segments to Consolidated Statements of Income) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	[1]	¥ 1,072,300	¥ 1,200,600		¥ 1,371,500
Reversal of (provision for) credit losses		(34,330)	240,847	[2]	(253,688)	[2]
Trading account profits (losses)-net		168,900	(73,114)		(639,184)
Foreign exchange gains (losses)-net		(95,987)	(49,561)		(134,885)
Equity in earnings of equity method investees-net		209,732	227,984	[2]	197,821	[2]
Impairment of goodwill	[2]				(6,638)
Impairment of intangible assets		(118,108)	(21,900)	[2]	(5,803)	[2]
Reversal of (provision for) off-balance sheet credit instruments		(38,463)	96,054		(106,556)
Income before income tax expense		870,842	1,661,819		272,543
Reconciliation [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit		1,072,000	1,201,000		1,372,000
Reversal of (provision for) credit losses		(34,000)	241,000		(254,000)
Trading account profits (losses)-net		182,000	(287,000)		(880,000)
Equity investment securities gains (losses)-net		(305,000)	215,000		181,000
Debt investment securities gains (losses)-net		(3,000)	71,000		48,000
Foreign exchange gains (losses)-net		47,000	7,000		(110,000)
Equity in earnings of equity method investees-net		210,000	228,000		198,000
Impairment of goodwill					(7,000)
Impairment of intangible assets		(118,000)	(22,000)		(6,000)
Reversal of (provision for) off-balance sheet credit instruments		(38,000)	96,000		(107,000)
Other-net		(142,000)	(88,000)		(162,000)
Income before income tax expense		¥ 871,000	¥ 1,662,000		¥ 273,000
[1]	Prior period business segment information has been restated to reflect the transfer of corporate loan-related businesses of Mitsubishi UFJ Trust and Banking to MUFG Bank. In accordance with internal management accounting rules and practices, the transfer resulted in a decrease of the total operating profit by ¥24.3 billion and ¥23.5 billion for fiscal years ended March 31, 2017 and 2018, respectively.
[2]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.

Foreign Activities (Estimated F

Foreign Activities (Estimated Financial Information by Geographic Areas) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	¥ 5,408,623	¥ 5,194,107	¥ 4,187,473
Total expense	[2]	4,537,781	3,532,288	3,914,930
Income (loss) before income tax expense (benefit)		870,842	1,661,819	272,543
Net income (loss) attributable to Mitsubishi UFJ Financial Group		718,645	1,228,160	202,680
Total assets at end of fiscal year		305,228,899	300,570,312	297,185,019
Domestic, Japan [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	1,886,469	2,127,278	1,903,336
Total expense	[2]	2,204,147	1,687,344	2,345,731
Income (loss) before income tax expense (benefit)		(317,678)	439,934	(442,395)
Net income (loss) attributable to Mitsubishi UFJ Financial Group		(345,148)	140,091	(365,734)
Total assets at end of fiscal year		194,070,495	196,121,542	191,305,636
Foreign, United States of America [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	1,637,569	1,337,529	749,513
Total expense	[2]	1,012,978	843,885	677,548
Income (loss) before income tax expense (benefit)		624,591	493,644	71,965
Net income (loss) attributable to Mitsubishi UFJ Financial Group		573,698	447,887	119,189
Total assets at end of fiscal year		49,987,389	44,831,664	46,053,230
Foreign, Europe [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	222,267	506,211	330,751
Total expense	[2]	173,934	173,665	138,128
Income (loss) before income tax expense (benefit)		48,333	332,546	192,623
Net income (loss) attributable to Mitsubishi UFJ Financial Group		50,877	322,581	216,584
Total assets at end of fiscal year		21,535,278	22,342,574	23,821,920
Foreign, Asia / Oceania Excluding Japan [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	1,157,946	779,983	818,917
Total expense	[2]	892,729	651,125	582,665
Income (loss) before income tax expense (benefit)		265,217	128,858	236,252
Net income (loss) attributable to Mitsubishi UFJ Financial Group		214,582	92,016	102,803
Total assets at end of fiscal year		27,992,986	27,163,121	25,255,955
Foreign, Other Areas [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1],[3]	504,372	443,106	384,956
Total expense	[2],[3]	253,993	176,269	170,858
Income (loss) before income tax expense (benefit)	[3]	250,379	266,837	214,098
Net income (loss) attributable to Mitsubishi UFJ Financial Group	[3]	224,636	225,585	129,838
Total assets at end of fiscal year	[3]	¥ 11,642,751	¥ 10,111,411	¥ 10,748,278
[1]	Total revenue is comprised of Interest income and Non-interest income.
[2]	Total expense is comprised of Interest expense, Provision for (reversal of) credit losses and Non-interest expense.
[3]	Other areas primarily include Canada, Latin America, the Caribbean and the Middle East.

Foreign Activities (Analysis of

Foreign Activities (Analysis of Certain Asset and Liability Accounts Related to Foreign Activities) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017	[1]
Foreign Activities Disclosure [Line Items]
Cash and due from banks		¥ 33,924,340	¥ 32,648,387
Interest-earning deposits in other banks		40,646,920	43,209,662
Cash, due from banks and interest-earning deposits in other banks		74,571,260	75,858,049	[1]	¥ 64,009,770
Trading account assets		40,576,618	35,186,689
Investment securities		44,938,004	43,654,249
Loans-net of unearned income, unamortized premiums and deferred loan fees	[2]	116,883,941	117,035,895
Deposits		199,280,789	195,674,593
Funds borrowed:
Call money, funds purchased		2,450,320	2,452,543
Payables under repurchase agreements		25,224,632	18,134,594
Payables under securities lending transactions		913,087	8,170,218
Other short-term borrowings		6,732,118	6,881,262
Long-term debt		27,990,543	27,069,556
Trading account liabilities		13,009,492	12,222,331
Foreign [Member]
Foreign Activities Disclosure [Line Items]
Cash and due from banks		828,839	1,816,704
Interest-earning deposits in other banks		8,453,191	8,560,283
Cash, due from banks and interest-earning deposits in other banks		9,282,030	10,376,987
Trading account assets		26,991,984	23,904,678
Investment securities		8,779,340	7,692,969
Loans-net of unearned income, unamortized premiums and deferred loan fees		51,678,674	51,339,696
Deposits		49,044,234	45,818,648
Funds borrowed:
Call money, funds purchased		67,246	355,666
Payables under repurchase agreements		9,459,547	8,181,347
Payables under securities lending transactions		47,886	276,563
Other short-term borrowings		5,107,832	5,152,667
Long-term debt		2,697,463	2,223,246
Total		17,379,974	16,189,489
Trading account liabilities		¥ 3,897,844	¥ 4,251,049
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.
[2]	The above table includes loans held for sale of ¥226,923 million and ¥291,794 million at March 31, 2018 and 2019, respectively.

Fair Value (Assets and Liabilit

Fair Value (Assets and Liabilities Measured at Fair Value by Level on Recurring Basis) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019		Mar. 31, 2018
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	¥ 13,205,000		¥ 12,585,000
Investment securities, Available-for-sale debt securities		33,518,503		32,833,114
Equity securities		6,977,600		7,238,194
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	12,710,000		11,877,000
Obligation to return securities received as collateral		3,087,026		3,176,962
Interest Rate Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	10,109,000		8,712,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	9,896,000		8,691,000
Foreign Exchange Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	2,795,000		3,557,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	2,671,000		3,000,000
Equity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	188,000		207,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	183,000		227,000
Commodity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	27,000		35,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	27,000		33,000
Credit Derivatives [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	84,000		72,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	69,000		71,000
Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		24,077,696		24,567,904
Japanese Prefectural and Municipal Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,226,566		1,537,431
Foreign Government and Official Institution Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,641,419		2,171,692
Corporate Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,130,731		1,119,360
Residential Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,615,351		1,617,535
Commercial Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		130,955		95,236
Asset-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,502,922		1,558,349
Other Debt Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		192,863	[4]	165,607	[5]
Fair Value, Measurements, Recurring [Member]
Assets:
Trading account assets, Trading securities	[6]	27,331,733		22,579,997
Trading account assets, Trading derivative assets		13,204,485		12,585,175
Investment securities, Available-for-sale debt securities		33,518,503		32,833,114
Equity securities	[7]	6,386,363		6,699,943
Others	[8],[9]	881,755		1,057,250
Assets at fair value, Total		81,322,839		75,755,479
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		162,910		215,414
Trading account liabilities, Trading derivative liabilities		12,846,582		12,006,917
Obligation to return securities received as collateral		3,087,026		3,176,962
Others	[10]	492,016		482,172
Liabilities at fair value, Total		16,588,534		15,881,465
Fair Value, Measurements, Recurring [Member] | Private Equity Funds [Member]
Assets:
Investments valued at net asset value				35
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities	[6]	12,821,328		10,876,424
Trading account assets, Trading derivative assets		63,582		71,175
Investment securities, Available-for-sale debt securities		22,550,086		23,105,682
Equity securities	[7]	5,982,629		6,255,413
Others	[8],[9]	807,193		955,548
Assets at fair value, Total		42,224,818		41,264,242
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		157,114		208,354
Trading account liabilities, Trading derivative liabilities		88,329		80,673
Obligation to return securities received as collateral		2,912,355		3,030,974
Liabilities at fair value, Total		3,157,798		3,320,001
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities	[6]	13,725,079		10,876,080
Trading account assets, Trading derivative assets		13,047,590		12,420,100
Investment securities, Available-for-sale debt securities		10,684,983		9,376,772
Equity securities	[7]	375,914		416,171
Others	[8],[9]	42,184		93,042
Assets at fair value, Total		37,875,750		33,182,165
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		5,796		7,060
Trading account liabilities, Trading derivative liabilities		12,701,110		11,844,463
Obligation to return securities received as collateral		174,671		145,988
Others	[10]	426,368		507,700
Liabilities at fair value, Total		13,307,945		12,505,211
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities	[6]	785,326		827,493
Trading account assets, Trading derivative assets		93,313		93,900
Investment securities, Available-for-sale debt securities		283,434		350,660
Equity securities	[7]	27,820		28,359
Others	[8],[9]	32,378		8,660
Assets at fair value, Total		1,222,271		1,309,072
Liabilities:
Trading account liabilities, Trading derivative liabilities		57,143		81,781
Others	[10]	65,648		(25,528)
Liabilities at fair value, Total		122,791		56,253
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		10,108,456		8,711,839
Liabilities:
Trading account liabilities, Trading derivative liabilities		9,896,293		8,674,623
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		23,430		3,320
Liabilities:
Trading account liabilities, Trading derivative liabilities		35,179		3,085
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		10,067,719		8,681,427
Liabilities:
Trading account liabilities, Trading derivative liabilities		9,839,618		8,659,042
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		17,307		27,092
Liabilities:
Trading account liabilities, Trading derivative liabilities		21,496		12,496
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		2,795,091		3,557,421
Liabilities:
Trading account liabilities, Trading derivative liabilities		2,670,650		3,000,252
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		1,115		1,890
Liabilities:
Trading account liabilities, Trading derivative liabilities		2,633		2,058
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		2,771,115		3,543,413
Liabilities:
Trading account liabilities, Trading derivative liabilities		2,663,347		2,992,812
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		22,861		12,118
Liabilities:
Trading account liabilities, Trading derivative liabilities		4,670		5,382
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		187,703		207,310
Liabilities:
Trading account liabilities, Trading derivative liabilities		183,392		226,781
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		39,037		65,965
Liabilities:
Trading account liabilities, Trading derivative liabilities		50,517		75,530
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		139,666		118,351
Liabilities:
Trading account liabilities, Trading derivative liabilities		126,737		117,572
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		9,000		22,994
Liabilities:
Trading account liabilities, Trading derivative liabilities		6,138		33,679
Fair Value, Measurements, Recurring [Member] | Commodity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		29,411		36,992
Liabilities:
Trading account liabilities, Trading derivative liabilities		27,651		34,432
Fair Value, Measurements, Recurring [Member] | Commodity Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		3,727		6,239
Liabilities:
Trading account liabilities, Trading derivative liabilities		2,916		4,362
Fair Value, Measurements, Recurring [Member] | Commodity Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		25,684		30,753
Liabilities:
Trading account liabilities, Trading derivative liabilities		24,735		30,070
Fair Value, Measurements, Recurring [Member] | Credit Derivatives [Member]
Assets:
Trading account assets, Trading derivative assets		83,824		71,613
Liabilities:
Trading account liabilities, Trading derivative liabilities		68,596		70,829
Fair Value, Measurements, Recurring [Member] | Credit Derivatives [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		65,363		70,670
Liabilities:
Trading account liabilities, Trading derivative liabilities		68,492		70,675
Fair Value, Measurements, Recurring [Member] | Credit Derivatives [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		18,461		943
Liabilities:
Trading account liabilities, Trading derivative liabilities		104		154
Fair Value, Measurements, Recurring [Member] | Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		24,077,696		24,567,904
Fair Value, Measurements, Recurring [Member] | Japanese National Government and Japanese Government Agency Bonds [Member] | Level 1 [Member]
Assets:
Investment securities, Available-for-sale debt securities		20,635,872		21,522,128
Fair Value, Measurements, Recurring [Member] | Japanese National Government and Japanese Government Agency Bonds [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		3,441,824		3,045,776
Fair Value, Measurements, Recurring [Member] | Japanese Prefectural and Municipal Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,226,566		1,537,431
Fair Value, Measurements, Recurring [Member] | Japanese Prefectural and Municipal Bonds [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,226,566		1,537,431
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,641,419		2,171,692
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member] | Level 1 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,914,214		1,583,554
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		707,959		567,946
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		19,246		20,192
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,130,731		1,119,360
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,126,535		1,113,323
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		4,196		6,037
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,615,351		1,617,535
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-backed Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,615,336		1,617,520
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-backed Securities [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		15		15
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		130,955		95,236
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-backed Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		128,917		92,806
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-backed Securities [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,038		2,430
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,502,922		1,558,349
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,371,467		1,397,177
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		131,455		161,172
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		192,863		165,607
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		66,379		4,793
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		126,484		160,814
Fair Value, Measurements, Recurring [Member] | Marketable Equity Securities [Member]
Assets:
Equity securities		6,358,543		6,671,584
Fair Value, Measurements, Recurring [Member] | Marketable Equity Securities [Member] | Level 1 [Member]
Assets:
Equity securities		5,982,629		6,255,413
Fair Value, Measurements, Recurring [Member] | Marketable Equity Securities [Member] | Level 2 [Member]
Assets:
Equity securities		375,914		416,171
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member]
Assets:
Equity securities		27,820	[11]	28,359
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member] | Real Estate Funds [Member]
Assets:
Investments valued at net asset value		17,583
Unfunded commitments		2,054
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member] | Private Funds [Member]
Assets:
Investments valued at net asset value		9,921
Unfunded commitments
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member] | Level 3 [Member]
Assets:
Equity securities		27,820	[11]	28,359
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Trading account assets, Trading securities		2,629,975		1,865,673
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese National Government and Japanese Government Agency Bonds [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities		2,117,841		1,388,143
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese National Government and Japanese Government Agency Bonds [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		512,134		477,530
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese Prefectural and Municipal Bonds [Member]
Assets:
Trading account assets, Trading securities		117,799		189,756
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese Prefectural and Municipal Bonds [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		117,799		189,756
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member]
Assets:
Trading account assets, Trading securities		9,719,185		8,661,170
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities		9,264,028		8,190,781
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		454,365		469,342
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		792		1,047
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Corporate Bonds [Member]
Assets:
Trading account assets, Trading securities		3,234,969		3,278,595
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Corporate Bonds [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		3,203,585		3,255,503
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Corporate Bonds [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		31,384		23,092
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Residential Mortgage-backed Securities [Member]
Assets:
Trading account assets, Trading securities		7,073,534		4,473,448
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Residential Mortgage-backed Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		7,038,353		4,432,307
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Residential Mortgage-backed Securities [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		35,181		41,141
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Asset-backed Securities [Member]
Assets:
Trading account assets, Trading securities		880,952		870,988
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Asset-backed Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		253,274		186,351
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Asset-backed Securities [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		627,678		684,637
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Debt Securities [Member]
Assets:
Trading account assets, Trading securities		35,895		36,250
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Debt Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		747		2,800
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Debt Securities [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		35,148		33,450
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Commercial Paper [Member]
Assets:
Trading account assets, Trading securities		1,473,693		1,210,775
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Commercial Paper [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		1,473,693		1,210,775
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Assets:
Trading account assets, Trading securities	[12]	2,165,731		1,993,342
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Private Equity Funds [Member]
Assets:
Investments valued at net asset value		40,400		21,517
Unfunded commitments		94,483		61,463
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities	[12]	1,439,459		1,297,500
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities	[12]	671,129		651,716
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities	[12]	¥ 55,143		¥ 44,126
[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 32.
[2]	The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts.
[3]	This table does not include contracts with embedded derivatives for which the fair value option has been elected.
[4]	Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds.
[5]	Other debt securities in the table above include ¥152,374 million of private placement debt conduit bonds.
[6]	Includes securities measured under the fair value option.
[7]	The table above reflects changes in presentation that were made to equity investment securities at March 31, 2018. See Note 1 for further information.
[8]	Excludes certain investments valued at net asset value of private equity funds, whose fair values at March 31, 2018 was ¥35 million, and those at March 31, 2019 was nil, respectively. There was no amount of unfunded commitments related to these private equity funds at March 31, 2018 and 2019.
[9]	Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivative assets designated as hedging instruments.
[10]	Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments.
[11]	Excludes certain investments valued at net asset value of real estate funds and private funds, whose fair values at March 31, 2019 were ¥17,583 million, and ¥9,921 million, respectively. The amounts of unfunded commitments related to these real estate funds and private funds at March 31, 2019 were ¥2,054 million, and nil, respectively.
[12]	Excludes certain investments valued at net asset value of private equity funds whose fair values were ¥21,517 million and ¥40,400 million at March 31, 2018 and 2019, respectively. The amounts of unfunded commitments related to these private equity funds were ¥61,463 million and ¥94,483 million at March 31, 2018 and 2019, respectively.

Fair Value (Reconciliation of A

Fair Value (Reconciliation of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 Inputs) (Detail) - Fair Value, Measurements, Recurring [Member] - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		¥ 1,227,291	¥ 1,204,406
Total gains (losses) for the period included in earnings, Assets		21,072	(15,987)
Total gains (losses) for the period included in other comprehensive income, Assets		(11,896)	(14,861)
Purchases, Assets		756,792	1,032,375
Issues, Assets		(682)	(1,518)
Sales, Assets		(318,008)	(285,183)
Settlements, Assets		(552,087)	(664,655)
Transfers into Level 3, Assets		51,098	34,613
Transfers out of Level 3, Assets		(8,452)	(61,899)
Level 3 assets, Ending balance		1,165,128	1,227,291
Change in unrealized gains (losses) included in earnings for assets still held at period end		(11,691)	(35,905)
Level 3 liabilities, Beginning balance		(25,528)	28,432
Total gains (losses) for the period included in earnings, Liabilities		(19,629)	4,508
Total gains (losses) for the period included in other comprehensive income, Liabilities		6,670	(2,005)
Purchases, Liabilities
Issues, Liabilities		16,759	6,601
Sales, Liabilities
Settlements, Liabilities		(18,499)	(27,824)
Transfers into Level 3, Liabilities		44,727	1,056
Transfers out of Level 3, Liabilities		35,230	(31,290)
Level 3 liabilities, Ending balance		65,648	(25,528)
Change in unrealized gains (losses) included in earnings for liabilities still held at period end		(10,778)	35,010
Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 liabilities, Beginning balance		(25,528)	28,432
Total gains (losses) for the period included in earnings, Liabilities	[1]	(19,629)	4,508
Total gains (losses) for the period included in other comprehensive income, Liabilities		6,670	(2,005)
Issues, Liabilities		16,759	6,601
Settlements, Liabilities		(18,499)	(27,824)
Transfers into Level 3, Liabilities	[2]	44,727	1,056
Transfers out of Level 3, Liabilities	[2]	35,230	(31,290)
Level 3 liabilities, Ending balance		65,648	(25,528)
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	[1]	(10,778)	35,010
Trading Account Assets, Trading Securities, Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance	[3]	827,493	799,493
Total gains (losses) for the period included in earnings, Assets	[3],[4]	23,848	(25,944)
Total gains (losses) for the period included in other comprehensive income, Assets	[3]	(1,341)
Purchases, Assets	[3]	454,048	702,402
Sales, Assets	[3]	(316,384)	(281,927)
Settlements, Assets	[3]	(213,944)	(376,333)
Transfers into Level 3, Assets	[3]	29,445	34,986
Transfers out of Level 3, Assets	[3]	(17,839)	(25,184)
Level 3 assets, Ending balance	[3]	785,326	827,493
Change in unrealized gains (losses) included in earnings for assets still held at period end	[3],[4]	18,299	(26,391)
Trading Account Assets, Trading Securities, Debt Securities [Member] | Japanese National Government and Japanese Government Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Total gains (losses) for the period included in earnings, Assets			(4)
Purchases, Assets			1,079
Transfers out of Level 3, Assets			(1,075)
Trading Account Assets, Trading Securities, Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		1,047	1,836
Total gains (losses) for the period included in earnings, Assets		863	720
Purchases, Assets		117,619	107,685
Sales, Assets		(118,377)	(107,157)
Settlements, Assets		(317)	(1,064)
Transfers out of Level 3, Assets		(43)	(973)
Level 3 assets, Ending balance		792	1,047
Change in unrealized gains (losses) included in earnings for assets still held at period end		5	(2)
Trading Account Assets, Trading Securities, Debt Securities [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		23,092	25,521
Total gains (losses) for the period included in earnings, Assets		611	(6,424)
Purchases, Assets		2,040	3,170
Sales, Assets		(1,798)	(533)
Settlements, Assets		(4,188)	(10,391)
Transfers into Level 3, Assets	[5]	29,423	34,885
Transfers out of Level 3, Assets	[5]	(17,796)	(23,136)
Level 3 assets, Ending balance		31,384	23,092
Change in unrealized gains (losses) included in earnings for assets still held at period end		286	(6,377)
Trading Account Assets, Trading Securities, Debt Securities [Member] | Residential Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		41,141	47,914
Total gains (losses) for the period included in earnings, Assets		(282)	1,014
Settlements, Assets		(5,678)	(7,787)
Level 3 assets, Ending balance		35,181	41,141
Change in unrealized gains (losses) included in earnings for assets still held at period end		(289)	829
Trading Account Assets, Trading Securities, Debt Securities [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		684,637	654,814
Total gains (losses) for the period included in earnings, Assets		18,692	(21,124)
Total gains (losses) for the period included in other comprehensive income, Assets		(1,341)
Purchases, Assets		315,865	576,668
Sales, Assets		(195,851)	(172,324)
Settlements, Assets		(194,324)	(353,397)
Level 3 assets, Ending balance		627,678	684,637
Change in unrealized gains (losses) included in earnings for assets still held at period end		15,528	(19,387)
Trading Account Assets, Trading Securities, Debt Securities [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		33,450	35,552
Total gains (losses) for the period included in earnings, Assets		1,698	(2,102)
Level 3 assets, Ending balance		35,148	33,450
Change in unrealized gains (losses) included in earnings for assets still held at period end		1,698	(2,102)
Trading Account Assets, Trading Securities, Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		44,126	33,856
Total gains (losses) for the period included in earnings, Assets		2,266	1,976
Purchases, Assets		18,524	13,800
Sales, Assets		(358)	(1,913)
Settlements, Assets		(9,437)	(3,694)
Transfers into Level 3, Assets		22	101
Level 3 assets, Ending balance		55,143	44,126
Change in unrealized gains (losses) included in earnings for assets still held at period end		1,071	648
Trading Account Assets, Trading Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		12,119	37,245
Total gains (losses) for the period included in earnings, Assets	[4]	(5,871)	3,912
Total gains (losses) for the period included in other comprehensive income, Assets		(744)	520
Purchases, Assets		787	1,367
Issues, Assets		(682)	(1,518)
Settlements, Assets		37	(23,699)
Transfers into Level 3, Assets		20,192	(466)
Transfers out of Level 3, Assets		10,332	(5,242)
Level 3 assets, Ending balance		36,170	12,119
Change in unrealized gains (losses) included in earnings for assets still held at period end	[4]	(25,241)	(9,055)
Trading Account Assets, Trading Derivatives [Member] | Interest Rate Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		14,596	28,551
Total gains (losses) for the period included in earnings, Assets		12,397	(4,730)
Total gains (losses) for the period included in other comprehensive income, Assets		57	(42)
Issues, Assets		(119)
Settlements, Assets		(25,601)	(8,810)
Transfers into Level 3, Assets		(7,013)	(2,433)
Transfers out of Level 3, Assets		1,494	2,060
Level 3 assets, Ending balance		(4,189)	14,596
Change in unrealized gains (losses) included in earnings for assets still held at period end		11,507	(3,908)
Trading Account Assets, Trading Derivatives [Member] | Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		6,736	14,858
Total gains (losses) for the period included in earnings, Assets		(10,997)	(2,434)
Total gains (losses) for the period included in other comprehensive income, Assets		(419)	294
Purchases, Assets		210	26
Settlements, Assets		(322)	(67)
Transfers into Level 3, Assets	[5]	27,230	1,996
Transfers out of Level 3, Assets		(4,247)	(7,937)
Level 3 assets, Ending balance		18,191	6,736
Change in unrealized gains (losses) included in earnings for assets still held at period end		(10,451)	1,713
Trading Account Assets, Trading Derivatives [Member] | Equity Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		(10,685)	(6,312)
Total gains (losses) for the period included in earnings, Assets		18,756	12,518
Total gains (losses) for the period included in other comprehensive income, Assets		(374)	272
Purchases, Assets		13	687
Issues, Assets		(228)	(1,154)
Settlements, Assets		(17,680)	(17,302)
Transfers into Level 3, Assets	[5]	(25)	(29)
Transfers out of Level 3, Assets	[5]	13,085	635
Level 3 assets, Ending balance		2,862	(10,685)
Change in unrealized gains (losses) included in earnings for assets still held at period end		(752)	(5,446)
Trading Account Assets, Trading Derivatives [Member] | Commodity Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		683	370
Total gains (losses) for the period included in earnings, Assets		32	30
Total gains (losses) for the period included in other comprehensive income, Assets		6	(4)
Purchases, Assets		564	654
Issues, Assets		(335)	(364)
Settlements, Assets		(1)	(3)
Level 3 assets, Ending balance		949	683
Change in unrealized gains (losses) included in earnings for assets still held at period end		795	116
Trading Account Assets, Trading Derivatives [Member] | Credit Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		789	(222)
Total gains (losses) for the period included in earnings, Assets		(26,059)	(1,472)
Total gains (losses) for the period included in other comprehensive income, Assets		(14)
Settlements, Assets		43,641	2,483
Level 3 assets, Ending balance		18,357	789
Change in unrealized gains (losses) included in earnings for assets still held at period end		(26,340)	(1,530)
Investment Securities, Available-for-sale Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		350,660	337,526
Total gains (losses) for the period included in earnings, Assets	[6]	6,415	4,831
Total gains (losses) for the period included in other comprehensive income, Assets		(9,791)	(15,344)
Purchases, Assets		273,201	319,092
Sales, Assets			(163)
Settlements, Assets		(338,180)	(264,616)
Transfers into Level 3, Assets		1,456	93
Transfers out of Level 3, Assets		(327)	(30,759)
Level 3 assets, Ending balance		283,434	350,660
Change in unrealized gains (losses) included in earnings for assets still held at period end	[6]	(498)	(167)
Investment Securities, Available-for-sale Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		20,192	20,099
Total gains (losses) for the period included in other comprehensive income, Assets		(876)	(186)
Purchases, Assets		645	621
Settlements, Assets		(715)	(342)
Level 3 assets, Ending balance		19,246	20,192
Investment Securities, Available-for-sale Debt Securities [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		6,037	36,932
Total gains (losses) for the period included in earnings, Assets		(345)	150
Total gains (losses) for the period included in other comprehensive income, Assets		3	(43)
Purchases, Assets		3,450	521
Sales, Assets			(52)
Settlements, Assets		(6,078)	(805)
Transfers into Level 3, Assets	[5]	1,456	93
Transfers out of Level 3, Assets	[5]	(327)	(30,759)
Level 3 assets, Ending balance		4,196	6,037
Change in unrealized gains (losses) included in earnings for assets still held at period end		(498)	(167)
Investment Securities, Available-for-sale Debt Securities [Member] | Residential Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		15	15
Level 3 assets, Ending balance		15	15
Investment Securities, Available-for-sale Debt Securities [Member] | Commercial Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		2,430	2,971
Total gains (losses) for the period included in other comprehensive income, Assets		(135)	4
Settlements, Assets		(257)	(545)
Level 3 assets, Ending balance		2,038	2,430
Investment Securities, Available-for-sale Debt Securities [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		161,172	116,919
Total gains (losses) for the period included in earnings, Assets		6,760	4,681
Total gains (losses) for the period included in other comprehensive income, Assets		(5,016)	(9,605)
Purchases, Assets		263,587	306,680
Settlements, Assets		(295,048)	(257,503)
Level 3 assets, Ending balance		131,455	161,172
Investment Securities, Available-for-sale Debt Securities [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		160,814	160,590
Total gains (losses) for the period included in other comprehensive income, Assets		(3,767)	(5,514)
Purchases, Assets		5,519	11,270
Sales, Assets			(111)
Settlements, Assets		(36,082)	(5,421)
Level 3 assets, Ending balance		126,484	160,814
Investment Securities, Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		28,359	26,292
Total gains (losses) for the period included in earnings, Assets	[6]	(2,298)	1,640
Purchases, Assets		3,795	3,930
Sales, Assets		(1,418)	(2,782)
Settlements, Assets			(7)
Transfers out of Level 3, Assets		(618)	(714)
Level 3 assets, Ending balance		27,820	28,359
Change in unrealized gains (losses) included in earnings for assets still held at period end	[6]	(3,060)	300
Investment Securities, Equity Securities [Member] | Nonmarketable Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		28,359	26,292
Total gains (losses) for the period included in earnings, Assets		(2,298)	1,640
Purchases, Assets		3,795	3,930
Sales, Assets		(1,418)	(2,782)
Settlements, Assets			(7)
Transfers out of Level 3, Assets		(618)	(714)
Level 3 assets, Ending balance		27,820	28,359
Change in unrealized gains (losses) included in earnings for assets still held at period end		(3,060)	300
Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		8,660	3,850
Total gains (losses) for the period included in earnings, Assets	[7]	(1,022)	(426)
Total gains (losses) for the period included in other comprehensive income, Assets		(20)	(37)
Purchases, Assets		24,961	5,584
Sales, Assets		(206)	(311)
Transfers into Level 3, Assets		5
Level 3 assets, Ending balance		32,378	8,660
Change in unrealized gains (losses) included in earnings for assets still held at period end	[7]	¥ (1,191)	¥ (592)
[1]	Included in Trading account profits (losses)-net.
[2]	Transfers into (out of) Level 3 for bifurcated embedded derivatives in Others were mainly caused by the decrease (increase) in the observability of the key inputs to the valuation models and a corresponding increase (decrease) in the significance of the unobservable inputs.
[3]	Includes Trading securities measured under the fair value option.
[4]	Included in Trading account profits (losses)-net and in Foreign exchange losses-net.
[5]	Transfers into Level 3 for Foreign exchange contract were mainly caused by the valuation using certain unobservable input. Transfers into (out of) Level 3 for corporate bonds were caused by the decrease (increase) in liquidity or the availability of the quoted prices provided by third-party venders and Equity contracts-net were mainly caused by the change of valuation model and the change cease using certain unobservable input.
[6]	Included in Investment securities gains (losses)-net.
[7]	Included in Other non-interest income.

Fair Value (Quantitative Inform

Fair Value (Quantitative Information about Level 3 Fair Value Measurements) (Detail) - Fair Value, Measurements, Recurring [Member] - Level 3 [Member] ¥ in Millions		Mar. 31, 2019JPY (¥)yr	Mar. 31, 2018JPY (¥)yr
Interest Rate Contracts [Member] | Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Fair value	[1]	¥ (4,189)	¥ 14,460
Interest Rate Contracts [Member] | Option Model [Member] | Probability of Default [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0	0
Interest Rate Contracts [Member] | Option Model [Member] | Probability of Default [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.120	0.125
Interest Rate Contracts [Member] | Option Model [Member] | Correlation Between Interest Rates [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.292	0.341
Interest Rate Contracts [Member] | Option Model [Member] | Correlation Between Interest Rates [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.513	0.527
Interest Rate Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Foreign Exchange Rate [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.228	0.197
Interest Rate Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Foreign Exchange Rate [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.600	0.504
Interest Rate Contracts [Member] | Option Model [Member] | Recovery Rate [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.410	0.410
Interest Rate Contracts [Member] | Option Model [Member] | Recovery Rate [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.480	0.460
Interest Rate Contracts [Member] | Option Model [Member] | Volatility [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.110	0.134
Interest Rate Contracts [Member] | Option Model [Member] | Volatility [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.713	1
Interest Rate Contracts [Member] | Option Model [Member] | Probability of Prepayment [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs			1
Foreign Exchange Contracts [Member] | Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Fair value	[1]	¥ 18,198	¥ 6,779
Foreign Exchange Contracts [Member] | Option Model [Member] | Probability of Default [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0	0
Foreign Exchange Contracts [Member] | Option Model [Member] | Probability of Default [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.120	0.125
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Interest Rates [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.350	0.403
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Interest Rates [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.700	0.740
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Foreign Exchange Rate [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.148	0.281
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Foreign Exchange Rate [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.600	0.507
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Underlying Assets [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.650	0.850
Foreign Exchange Contracts [Member] | Option Model [Member] | Recovery Rate [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.410	0.410
Foreign Exchange Contracts [Member] | Option Model [Member] | Recovery Rate [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.480	0.460
Foreign Exchange Contracts [Member] | Option Model [Member] | Volatility [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.097	0.103
Foreign Exchange Contracts [Member] | Option Model [Member] | Volatility [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.182	0.162
Equity Contracts [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Fair value	[1]	¥ 5,878	¥ 6,528
Equity Contracts [Member] | Discounted Cash Flow [Member] | Term of Litigation [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs | yr		1	2
Equity Contracts [Member] | Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Fair value	[1]	¥ (2,727)	¥ (16,600)
Equity Contracts [Member] | Option Model [Member] | Correlation Between Underlying Assets [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs			0.760
Equity Contracts [Member] | Option Model [Member] | Correlation Between Underlying Assets [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.517
Equity Contracts [Member] | Option Model [Member] | Correlation Between Underlying Assets [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.820
Equity Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Equity [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs			0.371
Equity Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Equity [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs			0.390
Equity Contracts [Member] | Option Model [Member] | Volatility [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.210
Equity Contracts [Member] | Option Model [Member] | Volatility [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.300
Equity Contracts [Member] | Option Model [Member] | Correlation Between Foreign Exchange Rate and Equity [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.070	0.070
Equity Contracts [Member] | Option Model [Member] | Correlation Between Foreign Exchange Rate and Equity [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.641	0.652
Equity Contracts [Member] | Option Model [Member] | Correlation Between Equities [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.216	0.206
Equity Contracts [Member] | Option Model [Member] | Correlation Between Equities [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives-net, Significant unobservable inputs		0.803	0.817
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 19,246	¥ 20,192
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Probability of Default [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0	0
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Probability of Default [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.004	0.004
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Probability of Default [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.003	0.002
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Recovery Rate [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.600	0.600
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Recovery Rate [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.700	0.700
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Recovery Rate [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.667	0.667
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Market-required Return on Capital [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.100
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Market-required Return on Capital [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.080
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Market-required Return on Capital [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.100
Foreign Government and Official Institution Bonds [Member] | Return on Equity Method [Member] | Market-required Return on Capital [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.100	0.095
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 109,213	¥ 110,536
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Probability of Default [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.012	0.012
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Probability of Default [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.053	0.053
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Probability of Default [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.050	0.045
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Recovery Rate [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.600	0.600
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Recovery Rate [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.760	0.760
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Recovery Rate [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.672	0.663
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Loan Price [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.905
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Loan Price [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		1.003
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Discounted Cash Flow [Member] | Loan Price [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.954
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1],[3]	¥ 587,577	¥ 684,586
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Asset Correlations [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.100	0.090
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Asset Correlations [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.100	0.090
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Discount Factor [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]		0.010
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Discount Factor [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.010
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Discount Factor [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.012
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Discount Factor [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.012	0.010
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Prepayment Rate [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.227	0.372
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Prepayment Rate [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.227	0.372
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Probability of Default [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0	0
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Probability of Default [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.901	0.913
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Probability of Default [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3],[4]
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Recovery Rate [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.643	0.653
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] | Internal Model [Member] | Recovery Rate [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.643	0.653
Other Debt Securities [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 35,148	¥ 33,450
Other Debt Securities [Member] | Discounted Cash Flow [Member] | Liquidity Premium [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.010	0.005
Other Debt Securities [Member] | Discounted Cash Flow [Member] | Liquidity Premium [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.024	0.024
Other Debt Securities [Member] | Discounted Cash Flow [Member] | Liquidity Premium [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.013	0.008
Other Debt Securities [Member] | Return on Equity Method [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 112,822	¥ 149,759
Other Debt Securities [Member] | Return on Equity Method [Member] | Probability of Default [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0	0
Other Debt Securities [Member] | Return on Equity Method [Member] | Probability of Default [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.250	0.250
Other Debt Securities [Member] | Return on Equity Method [Member] | Probability of Default [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.003	0.003
Other Debt Securities [Member] | Return on Equity Method [Member] | Recovery Rate [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.400	0.400
Other Debt Securities [Member] | Return on Equity Method [Member] | Recovery Rate [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.900	0.900
Other Debt Securities [Member] | Return on Equity Method [Member] | Recovery Rate [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.780	0.725
Other Debt Securities [Member] | Return on Equity Method [Member] | Market-required Return on Capital [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.080	0.080
Other Debt Securities [Member] | Return on Equity Method [Member] | Market-required Return on Capital [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.100	0.100
Other Debt Securities [Member] | Return on Equity Method [Member] | Market-required Return on Capital [Member] | Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.095	0.097
[1]	The fair value as of March 31, 2018 and 2019 excludes the fair value of investments valued using vendor prices.
[2]	Weighted averages are calculated by weighing each input by the relative fair value of the respective financial instruments.
[3]	For further detail of Internal model, refer to the last paragraph of "Trading Account Assets and Liabilities-Trading Account Securities."
[4]	See "Probability of default" in "Sensitivity to and range of unobservable inputs."

Fair Value (Carrying Value of A

Fair Value (Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level) (Detail) - Fair Value, Measurements, Nonrecurring [Member] - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	¥ 84,987	¥ 1,984
Loans		262,438	251,440
Loans, Loans held for sale		77,506	22,835
Loans, Collateral dependent loans		184,932	228,605
Premises and equipment		35,352	34,326
Intangible assets		19,635	9,402
Other assets		196,058	98,419
Other assets, Investments in equity method investees	[1]	186,284	92,223
Other assets, Other		9,774	6,196
Assets at fair value, Total		598,470	395,571
Private Equity Funds and Limited Partnerships [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities valued at net asset value		8,866	8,443
Unfunded commitments related to investment securities valued at net asset value		12,242	1,544
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans		2,656	3,458
Loans, Collateral dependent loans		2,656	3,458
Other assets		136,528	92,223
Other assets, Investments in equity method investees	[1]	136,528	92,223
Assets at fair value, Total		139,184	95,681
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	80,779
Loans		9,104	8,329
Loans, Collateral dependent loans		9,104	8,329
Other assets		49,756
Other assets, Investments in equity method investees	[1]	49,756
Assets at fair value, Total		139,639	8,329
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	4,208	1,984
Loans		250,678	239,653
Loans, Loans held for sale		77,506	22,835
Loans, Collateral dependent loans		173,172	216,818
Premises and equipment		35,352	34,326
Intangible assets		19,635	9,402
Other assets		9,774	6,196
Other assets, Other		9,774	6,196
Assets at fair value, Total		¥ 319,647	¥ 291,561
[1]	Excludes certain investments valued at net asset value of ¥8,443 million and ¥8,866 million at March 31, 2018 and 2019, respectively. The unfunded commitments related to these investments are ¥1,544 million and ¥12,242 million at March 31, 2018 and 2019, respectively. These investments are in private equity funds and limited partnerships.
[2]	Includes certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including impairment and observable price change for nonmarketable equity securities measured under the measurement alternative.

Fair Value (Losses (Gains) Reco

Fair Value (Losses (Gains) Recorded as a Result of Changes in Fair Value Measured on a Nonrecurring Basis) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 188,378	¥ 140,888
Investment Securities [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	(50,785)	1,423
Loans [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	30,153	47,352
Loans [Member] | Loans Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	4,762	990
Loans [Member] | Collateral Dependent Loans [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	25,391	46,362
Premises and Equipment [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	31,345	39,361
Intangible Assets [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	118,108	21,900
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	59,557	30,852
Other Assets [Member] | Investments in Equity Method Investees [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	51,645	29,442
Other Assets [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 7,912	¥ 1,410

Fair Value (Gains (Losses) Rela

Fair Value (Gains (Losses) Related to Instruments for which Fair Value Option was Elected) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Financial Liabilities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		¥ (13,881)	¥ 13,456	¥ (103,844)
Financial Liabilities [Member] | Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		(13,881)	13,456	(103,844)
Financial Liabilities [Member] | Other Short-term Borrowings [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(5,559)	5,902	(10,380)
Financial Liabilities [Member] | Other Short-term Borrowings [Member] | Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(5,559)	5,902	(10,380)
Financial Liabilities [Member] | Long-term Debt [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(8,322)	7,554	(93,464)
Financial Liabilities [Member] | Long-term Debt [Member] | Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(8,322)	7,554	(93,464)
Financial Assets [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		395,530	(415,749)	(872,386)
Financial Assets [Member] | Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		208,952	(148,242)	(464,947)
Financial Assets [Member] | Foreign Exchange Gains (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		186,578	(267,507)	(407,439)
Financial Assets [Member] | Trading Account Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[2]	395,530	(415,749)	(872,386)
Financial Assets [Member] | Trading Account Securities [Member] | Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[2]	208,952	(148,242)	(464,947)
Financial Assets [Member] | Trading Account Securities [Member] | Foreign Exchange Gains (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[2]	¥ 186,578	¥ (267,507)	¥ (407,439)
[1]	Change in value attributable to the instrument-specific credit risk related to those financial liabilities are not material.
[2]	Excludes Danamon's equity securities. See Note 2 for reference.

Fair Value (Differences between

Fair Value (Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	¥ 358,730	¥ 347,002
Fair value, Financial liabilities	325,808	333,985
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	(32,922)	(13,017)
Long-term Debt [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	358,730	347,002
Fair value, Financial liabilities	325,808	333,985
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	¥ (32,922)	¥ (13,017)

Fair Value (Summary of Carrying

Fair Value (Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Not Carried at Fair Value on Recurring Basis on Balance Sheets by Level) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2019	Mar. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying amounts of cost-method investment securities not practical to estimate fair value and no indicators of impairment			¥ 437,000
Carrying amounts of investments in equity method investees		¥ 2,487,389	2,219,196
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		33,924,000	32,648,000
Interest-earning deposits in other banks		40,647,000	43,210,000
Call loans and funds sold		1,110,000	896,000
Receivables under resale agreements		10,975,000	5,726,000
Receivables under securities borrowing transactions		2,759,000	9,269,000
Investment securities		4,442,000	3,684,000	[1],[2]
Loans, net of allowance for credit losses	[3]	116,213,000	116,272,000
Other financial assets	[4]	7,455,000	7,000,000
Deposits, Non-interest-bearing		30,443,000	29,862,000
Deposits, Interest-bearing		168,846,000	165,831,000
Total deposits		199,289,000	195,693,000
Call money and funds purchased		2,450,000	2,453,000
Payables under repurchase agreements		25,225,000	18,135,000
Payables under securities lending transactions		913,000	8,170,000
Due to trust account		2,736,000	3,386,000
Other short-term borrowings		6,441,000	6,617,000
Long-term debt		27,790,000	26,861,000
Other financial liabilities		6,781,000	6,642,000
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		33,924,000	32,648,000
Interest-earning deposits in other banks		40,647,000	43,210,000
Call loans and funds sold		1,110,000	896,000
Receivables under resale agreements		10,975,000	5,726,000
Receivables under securities borrowing transactions		2,759,000	9,269,000
Investment securities		4,453,000	3,797,000	[1],[2]
Loans, net of allowance for credit losses	[3]	117,064,000	117,753,000
Other financial assets	[4]	7,455,000	7,000,000
Deposits, Non-interest-bearing		30,443,000	29,862,000
Deposits, Interest-bearing		168,899,000	165,825,000
Total deposits		199,342,000	195,687,000
Call money and funds purchased		2,450,000	2,453,000
Payables under repurchase agreements		25,225,000	18,135,000
Payables under securities lending transactions		913,000	8,170,000
Due to trust account		2,736,000	3,386,000
Other short-term borrowings		6,441,000	6,617,000
Long-term debt		27,968,000	26,919,000
Other financial liabilities		6,781,000	6,642,000
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		33,924,000	32,648,000
Investment securities		1,197,000	1,197,000	[1],[2]
Loans, net of allowance for credit losses	[3]	3,000	3,000
Estimated Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest-earning deposits in other banks		40,647,000	43,210,000
Call loans and funds sold		1,110,000	896,000
Receivables under resale agreements		10,975,000	5,726,000
Receivables under securities borrowing transactions		2,759,000	9,269,000
Investment securities		1,135,000	1,051,000	[1],[2]
Loans, net of allowance for credit losses	[3]	247,000	330,000
Other financial assets	[4]	7,455,000	7,000,000
Deposits, Non-interest-bearing		30,443,000	29,862,000
Deposits, Interest-bearing		168,899,000	165,825,000
Total deposits		199,342,000	195,687,000
Call money and funds purchased		2,450,000	2,453,000
Payables under repurchase agreements		25,225,000	18,135,000
Payables under securities lending transactions		913,000	8,170,000
Due to trust account		2,736,000	3,386,000
Other short-term borrowings		6,441,000	6,617,000
Long-term debt		27,968,000	26,919,000
Other financial liabilities		6,781,000	6,642,000
Estimated Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities		2,121,000	1,549,000	[1],[2]
Loans, net of allowance for credit losses	[3]	¥ 116,814,000	¥ 117,420,000
[1]	Excludes cost-method investments of ¥437 billion at March 31, 2018, of which the MUFG Group did not estimate the fair value since it was not practical and no impairment indicators were identified. See Note 3 for the details of these cost-method investments.
[2]	Includes impaired securities measured at fair value on a nonrecurring basis at March 31, 2018. Refer to "Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis" for the details of the level classification.
[3]	Includes loans held for sale and collateral dependent loans measured at fair value on a nonrecurring basis. Refer to "Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis" for the details of the level classification.
[4]	Excludes investments in equity method investees of ¥2,219 billion and ¥2,487 billion at March 31, 2018 and 2019, respectively.

Stock-based Compensation (Narra

Stock-based Compensation (Narrative) (Detail) ¥ / shares in Units, ¥ in Millions	12 Months Ended
	Mar. 31, 2019JPY (¥)¥ / sharesshares	Dec. 31, 2018JPY (¥)shares	Dec. 31, 2018JPY (¥)$ / sharesshares	Mar. 31, 2018JPY (¥)¥ / sharesshares	Dec. 31, 2017JPY (¥)shares	Dec. 31, 2017JPY (¥)$ / sharesshares	Mar. 31, 2017JPY (¥)¥ / sharesshares	Dec. 31, 2016JPY (¥)	Dec. 31, 2016JPY (¥)$ / shares
MUAH [Member]
Stock-based Compensation [Line Items]
Compensation costs related to the Stock Acquisition Rights recognized		¥ 8,503			¥ 7,405			¥ 7,292
Tax benefit for compensation costs related to the Stock Acquisition Rights recognized		¥ 2,209			2,917			2,830
Weighted-average period expected to be recognized		1 year 4 months 24 days
Unrecognized compensation expense		¥ 12,210	¥ 12,210		12,543	¥ 12,543		11,183	¥ 11,183
Stock Option Plan [Member]
Stock-based Compensation [Line Items]
Approximate frequency of the Stock Acquisition Rights normally issued and granted	once a year			once a year			once a year
Number of shares to be issued or transferred upon exercise of each Stock Acquisition Right | shares	100
Contractual term of the Stock Acquisition Rights, in approximate years	30 years
Exercise price per share | ¥ / shares	¥ 1
Compensation costs related to the Stock Acquisition Rights recognized							¥ 252
Tax benefit for compensation costs related to the Stock Acquisition Rights recognized							77
Cash received from the exercise of the Stock Acquisition Rights				¥ 0			4
Actual tax benefit realized for the tax deductions from exercise of the Stock Acquisition Rights				¥ 2			651
Board Incentive Plan [Member]
Stock-based Compensation [Line Items]
Incremental compensation cost resulting from the modification of the Stock Option Plan							¥ 2,028
Board Incentive Plan [Member] | Common Stock [Member]
Stock-based Compensation [Line Items]
Weighted-average grant date fair value | ¥ / shares				¥ 721.50			¥ 521.60
Board Incentive Plan [Member] | Common Stock [Member] | Maximum [Member]
Stock-based Compensation [Line Items]
Amount of authorized shares to purchase in the open market	¥ 16,700			¥ 15,800
Board Incentive Plan [Member] | The BIP Trust I [Member]
Stock-based Compensation [Line Items]
Compensation costs related to the Stock Acquisition Rights recognized	1,601			2,514			¥ 1,238
Tax benefit for compensation costs related to the Stock Acquisition Rights recognized	¥ 490			¥ 770			379
Number of nonvested shares | shares	5,540,682			2,085,633
Weighted-average grant date fair value | ¥ / shares	¥ 722.10
Weighted-average period expected to be recognized	2 years 3 months 19 days
Unrecognized compensation expense	¥ 2,604			¥ 396			1,617
Board Incentive Plan [Member] | The BIP Trust I [Member] | Common Stock [Member]
Stock-based Compensation [Line Items]
Total fair value of shares/units that vested during the year	1,452			2,378			1,940
Board Incentive Plan [Member] | The BIP Trust II [Member]
Stock-based Compensation [Line Items]
Compensation costs related to the Stock Acquisition Rights recognized	723			1,452			1,039
Tax benefit for compensation costs related to the Stock Acquisition Rights recognized	¥ 221			¥ 445			318
Number of nonvested shares | shares	4,742,630			7,045,349
Weighted-average grant date fair value | ¥ / shares	¥ 722.10
Weighted-average period expected to be recognized	3 months 19 days
Unrecognized compensation expense	¥ 182			¥ 360			346
Board Incentive Plan [Member] | The BIP Trust II [Member] | Common Stock [Member]
Stock-based Compensation [Line Items]
Total fair value of shares/units that vested during the year	900			1,668			1,163
Board Incentive Plan [Member] | The BIP Trust III [Member]
Stock-based Compensation [Line Items]
Compensation costs related to the Stock Acquisition Rights recognized	520			218			2,112
Tax benefit for compensation costs related to the Stock Acquisition Rights recognized	¥ 159			¥ 67			¥ 385
Extension of the trust period	3 years
Board Incentive Plan [Member] | The BIP Trust III [Member] | Maximum [Member]
Stock-based Compensation [Line Items]
Extension of the trust period	30 years
Board Incentive Plan [Member] | The BIP Trust III [Member] | Common Stock [Member]
Stock-based Compensation [Line Items]
Number of nonvested shares | shares
Board Incentive Plan [Member] | The BIP Trust III [Member] | Common Stock [Member] | Maximum [Member]
Stock-based Compensation [Line Items]
Amount of trust money authorized to purchase common shares before May 15, 2017	¥ 8,100
Amount of trust money authorized to purchase common shares since May 15, 2017	¥ 9,600
MUAH Plan [Member] | Restricted Stock Units [Member]
Stock-based Compensation [Line Items]
Weighted-average grant date fair value | $ / shares						¥ 6.53			¥ 4.63
Total fair value of shares/units that vested during the year		¥ 8,614			¥ 8,414			¥ 5,333
Number of years awards generally become fully vested from the grant date under the stock bonus plan	3 years
Weighted-average service period for grants		3 years
MUAH Plan [Member] | Restricted Stock Units [Member] | MUAH [Member]
Stock-based Compensation [Line Items]
Number of nonvested shares | shares		28,443,070	28,443,070		27,838,414	27,838,414
Weighted-average grant date fair value | $ / shares			¥ 5.89

Stock-based Compensation (Summa

Stock-based Compensation (Summary of Stock Acquisition Rights Transactions) (Detail) - Stock Option Plan [Member] - JPY (¥) ¥ / shares in Units, ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Stock-based Compensation [Line Items]
Number of shares, Outstanding, Beginning of fiscal year		606,400
Number of shares, Outstanding, Transitioned to the Board Incentive Plan	[1]	(121,100)
Number of shares, Outstanding, End of fiscal year		485,300	606,400
Number of shares, Exercisable, End of fiscal year
Weighted-average exercise price, Outstanding, Beginning of fiscal year		¥ 1
Weighted-average exercise price, Outstanding, Transitioned to the Board Incentive Plan	[1]	1
Weighted-average exercise price, Outstanding, End of fiscal year		1	¥ 1
Weighted-average exercise price, Exercisable, End of fiscal year
Weighted-average remaining contractual term, Outstanding, in years, End of fiscal year		22 years 10 months 10 days
Weighted-average remaining contractual term, Exercisable, in years, End of fiscal year
Aggregate intrinsic value, Outstanding, End of fiscal year		¥ 266
Aggregate intrinsic value, Exercisable, End of fiscal year
Issuances under the Stock Option Plan
[1]	All shares transitioned to the Board Incentive Plan were granted and vested. See the explanation of the following item, The Board Incentive Plan, for more information.

Stock-based Compensation (Roll-

Stock-based Compensation (Roll-forward of Common Shares under the BIP Trust I and the BIP Trust II) (Detail) - Board Incentive Plan [Member]	12 Months Ended
	Mar. 31, 2019¥ / sharesshares
The BIP Trust I [Member]
Stock-based Compensation [Line Items]
Units outstanding, Nonvested, Beginning of fiscal year, Number of shares/units | shares	2,085,633
Granted, Number of shares | shares	6,959,500
Vested, Number of shares | shares	(2,654,379)
Forfeited, Number of shares | shares	(850,072)
Units outstanding, Nonvested, End of fiscal year, Number of shares/units | shares	5,540,682
Units outstanding, Nonvested, Beginning of fiscal year, Weighted-average grant date fair value | ¥ / shares	¥ 533.17
Granted, Weighted-average grant-date fair value | ¥ / shares	722.10
Vested, Weighted-average grant-date fair value | ¥ / shares	630.44
Forfeited, Weighted-average grant-date fair value | ¥ / shares	544.77
Units outstanding, Nonvested, End of fiscal year, Weighted-average grant date fair value | ¥ / shares	¥ 722.10
The BIP Trust II [Member]
Stock-based Compensation [Line Items]
Units outstanding, Nonvested, Beginning of fiscal year, Number of shares/units | shares	7,045,349
Granted, Number of shares | shares	6,090,100
Vested, Number of shares | shares	(1,825,882)
Forfeited, Number of shares | shares	(6,566,937)
Units outstanding, Nonvested, End of fiscal year, Number of shares/units | shares	4,742,630
Units outstanding, Nonvested, Beginning of fiscal year, Weighted-average grant date fair value | ¥ / shares	¥ 524.43
Granted, Weighted-average grant-date fair value | ¥ / shares	722.10
Vested, Weighted-average grant-date fair value | ¥ / shares	659.75
Forfeited, Weighted-average grant-date fair value | ¥ / shares	527.37
Units outstanding, Nonvested, End of fiscal year, Weighted-average grant date fair value | ¥ / shares	¥ 722.10

Stock-based Compensation (Sum_2

Stock-based Compensation (Summary of Compensation Costs under the BIP Trust) (Detail) - Board Incentive Plan [Member] - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
The BIP Trust I [Member]
Stock-based Compensation [Line Items]
Compensation costs	¥ 1,601	¥ 2,514	¥ 1,238
Tax benefit	490	770	379
Unrecognized compensation costs	2,604	396	1,617
The BIP Trust II [Member]
Stock-based Compensation [Line Items]
Compensation costs	723	1,452	1,039
Tax benefit	221	445	318
Unrecognized compensation costs	182	360	346
The BIP Trust III [Member]
Stock-based Compensation [Line Items]
Compensation costs	520	218	2,112
Tax benefit	¥ 159	¥ 67	¥ 385

Stock-based Compensation (Rol_2

Stock-based Compensation (Roll-forward of MUAH's Restricted Stock Units under MUAH Plan) (Detail) - MUAH Plan [Member] - Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock-based Compensation [Line Items]
Activity during fiscal year, Granted, Weighted-average grant date fair value		$ 6.53	$ 4.63
MUAH [Member]
Stock-based Compensation [Line Items]
Units outstanding, Nonvested, Beginning of fiscal year, Number of shares/units	27,838,414
Activity during fiscal year, Granted, Number of units	14,667,730
Activity during fiscal year, Vested, Number of units	(13,198,540)
Activity during fiscal year, Forfeited, Number of units	(864,534)
Units outstanding, Nonvested, End of fiscal year, Number of shares/units	28,443,070	27,838,414
Units outstanding, Nonvested, Beginning of fiscal year, Weighted-average grant date fair value	$ 5.86
Activity during fiscal year, Granted, Weighted-average grant date fair value	5.89
Activity during fiscal year, Vested, Weighted-average grant date fair value	5.88
Activity during fiscal year, Forfeited, Weighted-average grant date fair value	5.97
Units outstanding, Nonvested, End of fiscal year, Weighted-average grant date fair value	$ 5.86	$ 5.86

Stock-based Compensation (Sum_3

Stock-based Compensation (Summary of MUAH's Compensation Costs) (Detail) - MUAH [Member] - JPY (¥) ¥ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock-based Compensation [Line Items]
Compensation costs	¥ 8,503	¥ 7,405	¥ 7,292
Tax benefit	2,209	2,917	2,830
Unrecognized compensation costs	¥ 12,210	¥ 12,543	¥ 11,183

Parent Company Only Financial_3

Parent Company Only Financial Information (Narrative) (Detail) - BK and TB [Member] - JPY (¥) ¥ in Billions	Mar. 31, 2019	Mar. 31, 2018
Companies Act [Member]
Parent Company Only Financial Information [Line Items]
Unrestricted amount of retained earnings that are in excess of the level required under the statutory reserve requirements	¥ 6,077	¥ 5,819
Banking Law and Related Regulations [Member]
Parent Company Only Financial Information [Line Items]
Percentage limitation of loans or credits to the parent company over the banking subsidiary's consolidated total capital	15.00%
Restricted amount of net assets of consolidated subsidiaries as to payment of cash dividends and loans to the parent company	¥ 5,160	¥ 5,341

Parent Company Only Financial_4

Parent Company Only Financial Information (Condensed Balance Sheets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Assets:
Total assets	¥ 305,228,899	¥ 300,570,312	¥ 297,185,019
Liabilities and shareholder's equity:
Total liabilities	289,244,151	284,924,497
Total shareholders' equity	15,199,548	14,970,182
Total liabilities and equity	305,228,899	300,570,312
MUFG [Member]
Assets:
Cash and interest-earning deposits with banking subsidiaries	203,713	114,784
Investments in subsidiaries and affiliated companies	16,668,232	16,720,286
Investments in subsidiaries and affiliated companies, Banking subsidiaries	12,754,653	12,638,315
Investments in subsidiaries and affiliated companies, Non-banking subsidiaries and affiliated companies	3,913,579	4,081,971
Loans to subsidiaries	7,199,052	5,072,330
Loans to subsidiaries, Banking subsidiaries	6,864,309	4,885,830
Loans to subsidiaries, Non-banking subsidiaries	334,743	186,500
Other assets	223,725	166,514
Total assets	24,294,722	22,073,914
Liabilities and shareholder's equity:
Short-term borrowings from banking subsidiaries	1,425,682	1,600,179
Long-term debt from non-banking subsidiaries and affiliated companies	277,138	264,332
Long-term debt	7,187,469	5,088,478
Other liabilities	204,885	150,743
Total liabilities	9,095,174	7,103,732
Total shareholders' equity	15,199,548	14,970,182
Total liabilities and equity	¥ 24,294,722	¥ 22,073,914

Parent Company Only Financial_5

Parent Company Only Financial Information (Condensed Statements of Income) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income:
Foreign exchange gains (losses)-net		¥ (95,987)	¥ (49,561)	¥ (134,885)
Trading account losses-net		168,900	(73,114)	(639,184)
Expense:
Operating expenses	[1]	2,740,100	2,717,500	2,690,300
Income before income tax expense		870,842	1,661,819	272,543
Income tax expense (benefit)		133,237	407,823	94,453
Net income attributable to Mitsubishi UFJ Financial Group		718,645	1,228,160	202,680
MUFG [Member]
Income:
Dividends from subsidiaries and affiliated companies		306,879	576,332	608,504
Dividends from subsidiaries and affiliated companies, Banking subsidiaries		207,161	487,491	535,512
Dividends from subsidiaries and affiliated companies, Non-banking subsidiaries and affiliated companies		99,718	88,841	72,992
Management fees from subsidiaries		28,305	26,073	26,095
Interest income from subsidiaries		127,117	80,670	48,665
Foreign exchange gains (losses)-net		(20,598)	24,726	3,614
Trading account losses-net		(8,078)	(26,749)	(41,279)
Gains on sales of investment in subsidiaries and affiliated companies		252,253
Other income		3,199	1,508	1,427
Total income		689,077	682,560	647,026
Expense:
Operating expenses		28,168	26,016	25,692
Interest expense to subsidiaries and affiliated companies		34,594	31,426	28,867
Interest expense		108,756	65,068	35,689
Other expense		1,657	1,791	2,554
Total expense		173,175	124,301	92,802
Equity in undistributed net income (loss) of subsidiaries and affiliated companies-net		194,390	672,421	(362,899)
Income before income tax expense		710,292	1,230,680	191,325
Income tax expense (benefit)		(8,353)	2,520	(11,355)
Net income attributable to Mitsubishi UFJ Financial Group		¥ 718,645	¥ 1,228,160	¥ 202,680
[1]	Prior period business segment information has been restated to reflect the transfer of corporate loan-related businesses of Mitsubishi UFJ Trust and Banking to MUFG Bank. In accordance with internal management accounting rules and practices, the transfer resulted in a decrease of the total operating profit by ¥24.3 billion and ¥23.5 billion for fiscal years ended March 31, 2017 and 2018, respectively.

Parent Company Only Financial_6

Parent Company Only Financial Information (Condensed Statements of Cash Flows) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Mar. 31, 2017
Cash flows from operating activities:
Net income attributable to Mitsubishi UFJ Financial Group		¥ 718,645	¥ 1,228,160		¥ 202,680
Net cash provided by (used in) operating activities		228,334	(563,836)	[1]	690,429	[1]
Cash flows from investing activities:
Other-net		(49,590)	(72,765)	[1]	(151,078)	[1]
Net cash provided by (used in) investing activities		(4,632,028)	3,244,016	[1]	4,840,400	[1]
Cash flows from financing activities:
Proceeds from issuance of long-term debt		5,020,636	6,671,031	[1]	12,265,629	[1]
Repayment of long-term debt		(4,236,887)	(5,485,894)	[1]	(6,641,722)	[1]
Proceeds from sales of treasury stock		2,322	1,316	[1]	256	[1]
Payments for acquisition of treasury stock		(159,962)	(201,102)	[1]	(217,803)	[1]
Dividends paid		(275,581)	(240,514)	[1]	(246,345)	[1]
Other-net		197,673	(87,067)	[1]	105,995	[1]
Net cash provided by financing activities		3,063,331	9,362,206	[1]	9,145,300	[1]
Net increase (decrease) in cash and cash equivalents		(1,296,388)	11,854,237	[1]	14,341,336	[1]
Cash and cash equivalents at beginning of fiscal year	[1]	75,873,456	64,019,219		49,677,883
Cash and cash equivalents at end of fiscal year		74,577,068	75,873,456	[1]	64,019,219	[1]
MUFG [Member]
Cash flows from operating activities:
Net income attributable to Mitsubishi UFJ Financial Group		718,645	1,228,160		202,680
Adjustments and other		(351,775)	(799,571)		371,901
Net cash provided by (used in) operating activities		366,870	428,589		574,581
Cash flows from investing activities:
Proceeds from sales of investment in subsidiaries and affiliated companies		455,605			1,574
Purchase of equity investment in subsidiaries and an affiliated company		(18,346)	(53,000)		(91,877)
Net increase in loans to subsidiaries		(2,112,711)	(1,682,576)		(1,802,664)
Other-net		(9,009)	(4,361)		(2,659)
Net cash provided by (used in) investing activities		(1,684,461)	(1,739,937)		(1,895,626)
Cash flows from financing activities:
Net decrease in short-term borrowings from subsidiaries		(194,300)	(41,402)		(32,412)
Proceeds from issuance of long-term debt		2,043,677	1,872,986		1,808,672
Repayment of long-term debt		(314)	(112,184)		(20)
Repayment of long-term debt to affiliated companies		(500)	(1,090)		(1,136)
Proceeds from sales of treasury stock		3	1		1
Payments for acquisition of treasury stock		(150,277)	(200,038)		(200,028)
Dividends paid		(276,279)	(241,067)		(246,564)
Other-net		(15,490)	(9,677)		(9,333)
Net cash provided by financing activities		1,406,520	1,267,529		1,319,180
Net increase (decrease) in cash and cash equivalents		88,929	(43,819)		(1,865)
Cash and cash equivalents at beginning of fiscal year		114,784	158,603		160,468
Cash and cash equivalents at end of fiscal year		¥ 203,713	¥ 114,784		¥ 158,603
[1]	The reclassification of certain items on the consolidated balance sheets resulted in reclassification of the consolidated statements of cash flows for the fiscal years ended March 31, 2017 and 2018, respectively. See Note 1 Reclassifications for further information.

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Detail) ¥ / shares in Units, Rp / shares in Units, ¥ in Millions, Rp in Billions

Jun. 06, 2019JPY (¥)¥ / shares

May 27, 2019JPY (¥)

May 01, 2019

Apr. 29, 2019JPY (¥)

Apr. 29, 2019IDR (Rp)Rp / shares

Aug. 03, 2018JPY (¥)

Aug. 03, 2018IDR (Rp)Rp / shares

Dec. 29, 2017JPY (¥)

Dec. 29, 2017IDR (Rp)Rp / shares

Apr. 29, 2019¥ / shares

Aug. 03, 2018¥ / shares

Dec. 29, 2017¥ / shares

MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member]

Subsequent Event [Line Items]

Additional equity interests acquired, in percentage

20.10%

20.10%

Price per share paid | (per share)

Rp 8,921

Rp 8,323

¥ 69

[1]

¥ 70

[2]

Investment amount paid

¥ 132,300

[1]

Rp 17,187

¥ 133,000

[2]

Rp 15,875

Equity interest after acquisition, in aggregated percentage

40.00%

40.00%

19.90%

19.90%

Exchange rate of IDR

0.0077

0.0084

0.0077

0.0084

Subsequent Event [Member]

Subsequent Event [Line Items]

Exchange rate of IDR

0.008

0.008

Subsequent Event [Member] | MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member]

Subsequent Event [Line Items]

Additional equity interests acquired, in percentage

54.00%

54.00%

Price per share paid | (per share)

Rp 9,590

¥ 77

[3]

Investment amount paid

¥ 397,000

Rp 50,000

Equity interest after acquisition, in aggregated percentage

94.10%

94.00%

94.00%

Subsequent Event [Member] | MUFG Bank's Acquisition of Shares in Bank Nusantara Parahyangan in Indonesia [Member]

Subsequent Event [Line Items]

Additional equity interests acquired, in percentage

92.10%

92.10%

Price per share paid | (per share)

Rp 4,088

¥ 33

[3]

Investment amount paid

¥ 24,100

Rp 3,000

Equity interest after acquisition, in aggregated percentage

99.90%

99.90%

Subsequent Event [Member] | Non-cumulative and Non-dilutive Perpetual Preferred Securities [Member]

Subsequent Event [Line Items]

Redemption Date

Jul. 25, 2019

Subsequent Event [Member] | MUFG Capital Finance 8 Limited [Member] | Non-cumulative and Non-dilutive Perpetual Preferred Securities [Member]

Subsequent Event [Line Items]

Redemption amount

¥ 90,000

Subsequent Event [Member] | Common Stock [Member]

Subsequent Event [Line Items]

Dividends payable, amount per share | ¥ / shares

¥ 11

Dividends payable, total amount

¥ 142,552

Dividends payable, date to be paid

Jun. 28, 2019

Dividends payable, date of record

Mar. 31, 2019

[1]

Calculated based on the exchange rate of IDR1 = ¥0.0077

[2]

Calculated based on the exchange rate of IDR1 = ¥0.0084

[3]

Calculated based on the exchange rate of IDR1 = ¥0.008