Mitsubishi UFJ Financial (MUFG) 6-K 29 Dec 20 Current report (foreign) Financial data

Cover Page

Cover Page	6 Months Ended
	Sep. 30, 2020
Cover [Abstract]
Document Type	6-K
Document Period End Date	Sep. 30, 2020
Amendment Flag	false
Entity Registrant Name	MITSUBISHI UFJ FINANCIAL GROUP, INC.
Entity Central Index Key	0000067088
Current Fiscal Year End Date	--03-31

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - JPY (¥) ¥ in Millions		Sep. 30, 2020	Mar. 31, 2020
ASSETS
Cash and due from banks		¥ 46,982,224	¥ 33,283,032
Interest-earning deposits in other banks		46,935,862	45,266,680
Cash, due from banks and interest-earning deposits in other banks		93,918,086	78,549,712
Call loans, funds sold, and receivables under resale agreements		15,100,098	25,164,476
Receivables under securities borrowing transactions		3,199,178	3,443,959
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥6,709,467 and ¥5,026,025 at March 31, 2020 and September 30, 2020) (including ¥20,964,024 and ¥19,736,120 at March 31, 2020 and September 30, 2020 measured at fair value under fair value option)		46,018,006	47,504,058
Investment securities:
Available-for-sale debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥4,490,360 and ¥4,627,672 at March 31, 2020 and September 30, 2020)		45,012,551	34,200,203
Held-to-maturity debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥56,411 and ¥105,033 at March 31, 2020 and September 30, 2020) (fair value of ¥4,177,894 and ¥3,972,055 at March 31, 2020 and September 30, 2020)		3,930,246	4,165,781
Equity securities (including assets pledged that secured parties are permitted to sell or repledge of ¥616 and ¥12,187 at March 31, 2020 and September 30, 2020) (including ¥4,850,376 and ¥5,408,055 at March 31, 2020 and September 30, 2020 measured at fair value)		5,732,045	5,385,258
Total investment securities		54,674,842	43,751,242
Loans, net of unearned income, unamortized premiums and deferred loan fees (including assets pledged that secured parties are permitted to sell or repledge of ¥648,437 and ¥448,311 at March 31, 2020 and September 30, 2020)	[1]	116,748,119	118,186,739
Allowance for credit losses	[2]	(1,208,535)	(809,540)
Net loans		115,539,584	117,377,199
Premises and equipment—net		893,845	929,529
Customers' acceptance liability		181,627	167,257
Intangible assets—net		1,199,240	1,239,526
Goodwill		405,009	517,626
Other assets (net of allowance for credit losses of ¥14,465 at September 30, 2020)		11,401,172	13,108,699
Total assets		342,530,687	331,753,283
LIABILITIES AND EQUITY
Deposits: Domestic offices, Non-interest-bearing		29,644,830	28,091,421
Deposits: Domestic offices, Interest-bearing		136,010,950	126,485,629
Deposits: Overseas offices, principally interest-bearing		52,733,091	49,377,478
Total deposits		218,388,871	203,954,528
Call money, funds purchased, and payables under repurchase agreements		30,245,540	35,518,837
Payables under securities lending transactions		841,747	1,016,874
Due to trust account and other short-term borrowings (including ¥377,133 and ¥164,058 at March 31, 2020 and September 30, 2020 measured at fair value under fair value option)		15,080,398	19,433,229
Trading account liabilities		12,846,748	14,767,433
Bank acceptances outstanding		181,627	167,257
Long-term debt (including ¥304,067 and ¥393,710 at March 31, 2020 and September 30, 2020 measured at fair value under fair value option)		35,707,900	27,926,763
Other liabilities		13,413,317	13,223,846
Total liabilities		326,706,148	316,008,767
Commitments and contingent liabilities
Mitsubishi UFJ Financial Group shareholders' equity:
Capital stock—common stock authorized, 33,000,000,000 shares; common stock issued, 13,581,995,120 shares and 13,581,995,120 shares at March 31, 2020 and September 30, 2020, with no stated value		2,090,270	2,090,270
Capital surplus		5,528,701	5,533,520
Retained earnings:
Appropriated for legal reserve		239,571	239,571
Unappropriated retained earnings		8,410,074	8,079,530
Accumulated other comprehensive income, net of taxes		(544,100)	(420,417)
Treasury stock, at cost—741,772,308 common shares and 737,756,963 common shares at March 31, 2020 and September 30, 2020		(503,361)	(505,987)
Total Mitsubishi UFJ Financial Group shareholders' equity		15,221,155	15,016,487
Noncontrolling interests		603,384	728,029
Total equity		15,824,539	15,744,516
Total liabilities and equity		342,530,687	331,753,283
Consolidated VIEs [Member]
ASSETS
Cash and due from banks		1,138	846
Interest-earning deposits in other banks		29,356	30,047
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥6,709,467 and ¥5,026,025 at March 31, 2020 and September 30, 2020) (including ¥20,964,024 and ¥19,736,120 at March 31, 2020 and September 30, 2020 measured at fair value under fair value option)		847,065	695,069
Investment securities:
Total investment securities		1,573,137	1,804,459
Net loans		15,356,723	16,072,595
All other assets		206,189	244,645
Total assets		18,013,608	18,847,661
LIABILITIES AND EQUITY
Other short-term borrowings		30,497	30,831
Long-term debt		380,941	465,352
All other liabilities		58,793	101,969
Total liabilities		¥ 470,231	¥ 598,152
[1]	The above table includes loans held for sale of ¥344,790 million at March 31, 2020 and ¥315,142 million at September 30, 2020, respectively.
[2]	New guidance on measurement of credit losses on financial instruments requires allowance for credit losses to be measured by current expected credit losses model from April 1, 2020. For additional information, refer to Note 1.

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - JPY (¥) ¥ in Millions	Sep. 30, 2020	Mar. 31, 2020
Trading account assets pledged that secured parties are permitted to sell or repledge	¥ 5,026,025	¥ 6,709,467
Trading account assets measured at fair value under fair value option	19,736,120	20,964,024
Available-for-sale debt securities pledged that secured parties are permitted to sell or repledge	4,627,672	4,490,360
Allowance for credit losses	14,465
Held-to-maturity debt securities pledged that secured parties are permitted to sell or repledge	105,033	56,411
Held-to-maturity debt securities, Fair value	3,972,055	4,177,894
Equity securities pledged that secured parties are permitted to sell or repledge	12,187	616
Equity securities measured at fair value	5,408,055	4,850,376
Loans, net of unearned income, unamortized premiums and deferred loan fees, pledged that secured parties are permitted to sell or repledge	448,311	648,437
Due to trust account and other short-term borrowings measured at fair value under fair value option	164,058	377,133
Long-term debt measured at fair value under fair value option	¥ 393,710	¥ 304,067
Common stock, authorized	33,000,000,000	33,000,000,000
Common stock, issued	13,581,995,120	13,581,995,120
Common stock, stated value
Treasury stock, shares	737,756,963	741,772,308

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - JPY (¥) shares in Thousands, ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Interest income:
Loans, including fees		¥ 1,034,727	¥ 1,322,361
Deposits in other banks		30,422	95,288
Investment securities		160,273	223,367
Trading account assets		196,858	251,891
Call loans, funds sold, and receivables under resale agreements and securities borrowing transactions		64,603	127,604
Total		1,486,883	2,020,511
Interest expense:
Deposits		197,457	439,708
Call money, funds purchased, and payables under repurchase agreements and securities lending transactions		75,468	187,285
Due to trust account, other short-term borrowings and trading account liabilities		44,649	89,447
Long-term debt		138,892	166,318
Total		456,466	882,758
Net interest income		1,030,417	1,137,753
Provision for credit losses		209,806	102,121
Net interest income after provision for credit losses		820,611	1,035,632
Non-interest income:
Fees and commissions income		699,772	698,463
Foreign exchange gains (losses)—net		69,433	(108,687)
Trading account profits—net		244,303	547,299
Investment securities gains—net		683,661	11,654
Equity in earnings of equity method investees—net		140,420	165,487
Gain on remeasurement of previously held equity method investment		0	41,218
Other non-interest income		19,658	73,729
Total		1,857,247	1,429,163
Non-interest expense:
Salaries and employee benefits		607,166	591,594
Occupancy expenses—net		89,628	87,768
Fees and commissions expenses		148,250	160,619
Outsourcing expenses, including data processing		146,721	147,839
Depreciation of premises and equipment		43,807	62,395
Amortization of intangible assets		123,181	114,748
Insurance premiums, including deposit insurance		42,825	48,220
Communications		30,182	29,582
Taxes and public charges		52,599	46,766
Impairment of goodwill		106,479	241,356
Reversal of off-balance sheet credit instruments		(36,551)	(63,342)
Other non-interest expenses		177,457	158,758
Total		1,531,744	1,626,303
Income before income tax expense		1,146,114	838,492
Income tax expense		366,109	221,171
Net income before attribution of noncontrolling interests		780,005	617,321
Net income attributable to noncontrolling interests		3,105	779
Net income attributable to Mitsubishi UFJ Financial Group		776,900	616,542
Income used for the computation of basic EPS and diluted EPS (Numerator):
Net income attributable to Mitsubishi UFJ Financial Group		776,900	616,542
Effect of dilutive instruments:
Restricted stock units and performance stock units	[1]	(1,891)	(1,460)
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions		¥ 775,009	¥ 615,082
Shares used for the computation of basic EPS and diluted EPS (Denominator):
Weighted average common shares outstanding		12,856,192	12,938,860
Effect of dilutive instruments:
Stock acquisition rights	[1]	0	167
Weighted average common shares for diluted computation		12,856,192	12,939,027
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		¥ 60.43	¥ 47.65
Diluted earnings per common share—Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group	[1]	60.28	47.54
Cash dividend per common share		¥ 12.50	¥ 11
[1]	For the six months ended September 30, 2019 and 2020, 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.

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income before attribution of noncontrolling interests	¥ 780,005	¥ 617,321
Other comprehensive income (loss), net of tax:
Net unrealized gains on investment securities	60,183	91,456
Net debt valuation adjustments	(59,324)	850
Net unrealized gains on derivatives qualifying for cash flow hedges	38,006	9,130
Defined benefit plans	27,768	(8,373)
Foreign currency translation adjustments	(194,642)	(200,618)
Total	(128,009)	(107,555)
Comprehensive income	651,996	509,766
Net income attributable to noncontrolling interests	3,105	779
Other comprehensive income (loss) attributable to noncontrolling interests	(4,292)	12,317
Comprehensive income attributable to Mitsubishi UFJ Financial Group	¥ 653,183	¥ 496,670

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Equity (Unaudited) - 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]Unappropriated Retained Earnings [Member]Effect of adopting new guidance [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Accumulated Other Comprehensive Income (Loss), Net of Taxes [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Accumulated Other Comprehensive Income (Loss), Net of Taxes [Member]Effect of adopting new guidance [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Treasury Stock, at Cost [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member]Effect of adopting new guidance [Member]
Effect of adopting new guidance			¥ 2,090,270	¥ 5,577,186	¥ 239,571	¥ 8,094,026		¥ (284,269)		¥ (517,236)	¥ 785,200
Balance at beginning of period at Mar. 31, 2019			2,090,270	5,577,186	239,571	8,094,026		(284,269)		(517,236)	785,200
Stock-based compensation				(2,485)
Net income attributable to Mitsubishi UFJ Financial Group	¥ 616,542					616,542
Common stock—¥11.00 per share and ¥12.50 per share in 2019 and 2020						(142,150)
Effect of adopting new guidance	16,530,039	¥ 15,545,265	2,090,270	5,580,795	239,571	8,553,535		(404,141)		(514,765)	984,774
Effect of adopting new guidance | Leases [Member]							¥ (14,883)
Effect of adopting new guidance | Measurement of credit losses on financial instruments [Member]									¥ 0			¥ 0
Purchases of shares of treasury stock										(21)
Sales of shares of treasury stock										2,449
Net decrease resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies										43
Initial subscriptions of noncontrolling interests											84,095
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											115,025
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(1,880)
Net income attributable to noncontrolling interests	779										779
Dividends paid to noncontrolling interests											(7,469)
Other comprehensive income (loss), net of taxes	(107,555)							(119,872)			12,317
Other—net				6,094							(3,293)
Balance at end of period at Sep. 30, 2019	16,530,039	15,545,265	2,090,270	5,580,795	239,571	8,553,535		(404,141)		(514,765)	984,774
Balance at end of period (Leases [Member]) at Sep. 30, 2019							(14,883)
Balance at end of period (Measurement of credit losses on financial instruments [Member]) at Sep. 30, 2019									0			0
Effect of adopting new guidance	16,530,039	15,545,265	2,090,270	5,580,795	239,571	8,553,535		(404,141)		(514,765)	984,774
Effect of adopting new guidance | Leases [Member]							(14,883)
Effect of adopting new guidance | Measurement of credit losses on financial instruments [Member]									0			0
Effect of adopting new guidance	15,744,516		2,090,270	5,533,520	239,571	8,079,530		(420,417)		(505,987)	728,029
Balance at beginning of period at Mar. 31, 2020	15,744,516		2,090,270	5,533,520	239,571	8,079,530		(420,417)		(505,987)	728,029
Stock-based compensation				(2,363)
Net income attributable to Mitsubishi UFJ Financial Group	776,900					776,900
Common stock—¥11.00 per share and ¥12.50 per share in 2019 and 2020						(160,518)
Effect of adopting new guidance	15,824,539	15,221,155	2,090,270	5,528,701	239,571	8,410,074		(544,100)		(503,361)	603,384
Effect of adopting new guidance | Leases [Member]							0
Effect of adopting new guidance | Measurement of credit losses on financial instruments [Member]							(285,838)		34			(25,330)
Purchases of shares of treasury stock										(6)
Sales of shares of treasury stock										2,600
Net decrease resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies										32
Initial subscriptions of noncontrolling interests											426
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											(62,515)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(29,430)
Net income attributable to noncontrolling interests	3,105										3,105
Dividends paid to noncontrolling interests											(6,517)
Other comprehensive income (loss), net of taxes	(128,009)							(123,717)			(4,292)
Other—net				(2,456)							(92)
Balance at end of period at Sep. 30, 2020	15,824,539	15,221,155	2,090,270	5,528,701	239,571	8,410,074		(544,100)		(503,361)	603,384
Balance at end of period (Leases [Member]) at Sep. 30, 2020							0
Balance at end of period (Measurement of credit losses on financial instruments [Member]) at Sep. 30, 2020							(285,838)		34			(25,330)
Effect of adopting new guidance	¥ 15,824,539	¥ 15,221,155	¥ 2,090,270	¥ 5,528,701	¥ 239,571	¥ 8,410,074		¥ (544,100)		¥ (503,361)	¥ 603,384
Effect of adopting new guidance | Leases [Member]							0
Effect of adopting new guidance | Measurement of credit losses on financial instruments [Member]							¥ (285,838)		¥ 34			¥ (25,330)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Equity (Unaudited) (Parenthetical) - ¥ / shares	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash dividends: Common stock, per share	¥ 12.50	¥ 11
Mitsubishi UFJ Financial Group Shareholders' Equity [Member] | Unappropriated Retained Earnings [Member]
Cash dividends: Common stock, per share	¥ 12.50	¥ 11

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income before attribution of noncontrolling interests	¥ 780,005	¥ 617,321
Adjustments to reconcile net income before attribution of noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization	166,988	177,143
Impairment of goodwill	106,479	241,356
Provision for credit losses	209,806	102,121
Investment securities gains—net	(683,661)	(11,654)
Foreign exchange (gains) losses—net	(21,699)	296,321
Equity in earnings of equity method investees—net	(140,420)	(165,487)
Provision for deferred income tax expense	198,187	117,448
Increase in trading account assets, excluding foreign exchange contracts	(7,144)	(3,826,916)
Increase (decrease) in trading account liabilities, excluding foreign exchange contracts	(112,089)	2,235,832
Net decrease (increase) in collateral for derivative transactions	261,245	(16,491)
Increase in cash collateral for the use of Bank of Japan's settlement infrastructure	(31,041)	(54,018)
Other—net	372,004	(382,098)
Net cash provided by (used in) operating activities	1,098,660	(669,122)
Cash flows from investing activities:
Proceeds from sales and maturities of Available-for-sale debt securities (including proceeds from sales of debt securities under the fair value option)	43,946,970	41,728,624
Purchases of Available-for-sale debt securities (including purchases of debt securities under the fair value option)	(53,776,659)	(39,378,784)
Proceeds from maturities of Held-to-maturity debt securities	184,335	326,466
Purchases of Held-to-maturity debt securities	0	(192,438)
Proceeds from sales and redemption of Equity securities (including proceeds from equity securities under the fair value option)	748,314	1,442,025
Purchases of Equity securities (including purchases of equity securities under the fair value option)	(654,810)	(1,627,850)
Acquisition of Bank Danamon, a subsidiary of BK, net of cash acquired	0	(243,597)
Acquisition of FSI (formerly, Colonial First State Global Asset Management), subsidiaries of TB, net of cash acquired	0	(249,354)
Net decrease in loans	431,010	789,756
Net decrease (increase) in call loans, funds sold, and receivables under resale agreements and securities borrowing transactions	9,730,114	(5,542,176)
Capital expenditures for premises and equipment	(51,085)	(47,119)
Purchases of intangible assets	(122,369)	(157,965)
Proceeds from sales of consolidated VIEs and subsidiaries—net	(7,802)	29,057
Other—net	31,213	91,756
Net cash provided by (used in) investing activities	459,231	(3,031,599)
Cash flows from financing activities:
Net increase in deposits	14,781,816	17,803
Net increase (decrease) in call money, funds purchased, and payables under repurchase agreements and securities lending transactions	(4,592,482)	1,958,302
Net increase (decrease) in due to trust account and other short-term borrowings	(4,003,713)	1,060,876
Proceeds from issuance of long-term debt	14,924,032	2,194,947
Repayments of long-term debt	(6,713,103)	(2,425,134)
Proceeds from sales of treasury stock	905	1,061
Dividends paid	(160,475)	(142,143)
Payments for acquisition of treasury stock	(6)	(21)
Other—net	(266,385)	205,134
Net cash provided by financing activities	13,970,589	2,870,825
Effect of exchange rate changes on cash and cash equivalents	(162,497)	(410,876)
Net increase (decrease) in cash and cash equivalents	15,365,983	(1,240,772)
Cash and cash equivalents at beginning of period	78,555,591	74,577,068
Cash and cash equivalents: Cash, due from banks and interest-earning deposits in other banks	93,918,086	73,328,173
Cash and cash equivalents: Restricted cash included in other assets	3,488	8,123
Cash and cash equivalents at end of period	93,921,574	73,336,296
Cash paid during the period for:
Interest	518,169	893,453
Income taxes, net of refunds	2,749	(17,473)
Non-cash investing and financing activities:
Assets acquired under finance lease arrangements	1,380	9,981
Assets acquired under operating lease arrangements	18,170	19,490
Acquisition of Bank Danamon, a subsidiary of BK (Note 2):
Fair value of assets acquired, excluding cash and cash equivalents	0	1,811,160
Fair value of liabilities assumed	0	1,242,115
Fair value of noncontrolling interests	0	51,314
Acquisition of FSI (formerly, Colonial First State Global Asset Management), subsidiaries of TB (Note 2):
Fair value of assets acquired, excluding cash and cash equivalents	0	336,030
Fair value of liabilities assumed	¥ 0	¥ 71,716

Basis of Semiannual Condensed C

Basis of Semiannual Condensed Consolidated Financial Statements [Text Block]	6 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Basis of Semiannual Condensed Consolidated Financial Statements [Text Block]	1. BASIS OF SEMIANNUAL CONDENSED CONSOLIDATED FINANCIAL STATEMENTS 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 17 Basis of Financial Statements The accompanying semiannual condensed consolidated financial statements are presented in Japanese yen, the currency of the country in which MUFG is incorporated and principally operates. The accompanying condensed consolidated financial statements include the accounts of MUFG, its subsidiaries and certain variable interest entities (“VIE”s) (together, the “MUFG Group”), and reflect all adjustments (consisting of normal recurring adjustments) that, in the opinion of management, are necessary to conform with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements for the fiscal year ended March 31, 2020 Use of Estimates The preparation of condensed 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Accounting Changes Disclosure Framework Changes to the Disclosure Requirements for Fair Value Measurement adoption is permitted upon issuance of this guidance. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this guidance and delay adoption of the additional disclosures until their effective date. The MUFG Group early adopted removal disclosure requirements as of March 31, 2019 , and then Measurement of Credit Losses on Financial Instruments available-for-sale In April 2019 and November 2019, the FASB issued additional guidance to improve certain aspects of this guidance. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The MUFG Group adopted the guidance on April 1, 2020. Upon adoption, the MUFG Group resulted in an increase in the beginning balance of the allowance for credit losses and the allowance for off-balance 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 Recently Issued Accounting Pronouncements Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans

Business Developments _Text Blo

Business Developments [Text Block]	6 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
Business Developments [Text Block]	2. BUSINESS DEVELOPMENTS 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, small and medium enterprise (“SME”) and corporate customers, with a network of around 900 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 was executed through three steps (the “Proposed Transaction”), and the completion of the Proposed Transaction resulted 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) e 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) calculated on the basis of Danamon’s net assets as of June 30, 2018 with certain adjustments applied. As a result, equity interest in Danamon increased to 40%, and MUFG Bank started to apply the equity method of accounting for its investment in Danamon during the six months ended September 30, 2018. In Step 3, MUFG Bank acquired an additional 54.0% equity interest in Danamon from AFI and other shareholders on April 29, 2019, based on a price of IDR 9,590 (approximately ¥77 (3) (3) On May 1, 2019, MUFG Bank merged BNP Notes: (1) Calculated based on the exchange rate of IDR1 = ¥0.0084 (2) Calculated based on the exchange rate of IDR1 = ¥0.0077 (3) Calculated based on the exchange rate of IDR1 = ¥0.0080 See Note 2 to the consolidated financial stat e Acquisition of Colonial First State Global Asset Management On August 2, 2019, Mitsubishi UFJ Trust and Banking acquired 100% of the shares in each of the , The MUFG Group is seeking the opportunities to enhance its competitive edge as well as expanding its client base globally in asset management business. The acquisition of FSI is a milestone to strengthen its capability and that is the reason such goodwill was paid which is allocated to the segment of Asset Management & Investor Services Business Group. The MUFG Group will continue to respond to customer expectations by leveraging the advantages and brands of FSI as well as the MUFG Group’s original asset management arms, aiming to become an asset management service provider with a global presence. See Note 2 to the consolidated financial statements for the fiscal year ended March 31, 2020 for further information about the acquisition of FSI. Acquisition of DVB Bank SE’s Aviation Finance Division On March 1, 2019, MUFG Bank and BOT Lease Co., Ltd. (“BOT Lease”), entered into an agreement with DVB Bank SE (“DVB”) to transfer DVB’s aviation finance division, including aviation finance-related businesses, to MUFG Bank and 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. On November 18, 2019, MUFG Bank acquired DVB’s most of aviation finance client lending portfolio, employees, and other part of the operation infrastructure for ¥555 billion in cash. MUFG Bank recorded goodwill of ¥32,591 million. During the six months ended September 30, 2020, the purchase price adjustments were made, which increased goodwill by ¥519 million. See Note 20 Subsequent events for further information.

Investment Securities _Text Blo

Investment Securities [Text Block]	6 Months Ended
	Sep. 30, 2020
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 At March 31, 2020: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,308,538 ¥ 185,302 ¥ 30,961 ¥ 23,462,879 Japanese prefectural and municipal bonds 2,938,743 16,279 2,202 2,952,820 Foreign government and official institution bonds 2,936,110 107,406 6,028 3,037,488 Corporate bonds 1,261,586 12,445 1,205 1,272,826 Residential mortgage-backed securities 1,460,641 3,083 4,331 1,459,393 Commercial mortgage-backed securities 379,234 6,110 3,089 382,255 Asset-backed securities 1,461,083 9,516 1,123 1,469,476 Other debt securities (1) 161,832 3,190 1,956 163,066 Total ¥ 33,907,767 ¥ 343,331 ¥ 50,895 ¥ 34,200,203 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,574 ¥ 29,856 ¥ — ¥ 1,130,430 Foreign government and official institution bonds 151,555 243 689 151,109 Residential mortgage-backed securities 737,242 10,478 3,012 (2) 744,708 Commercial mortgage-backed securities 146,039 2,993 317 (2) 148,715 Asset-backed securities 2,030,371 277 27,716 2,002,932 Total ¥ 4,165,781 ¥ 43,847 ¥ 31,734 ¥ 4,177,894 Notes: (1) Other debt securities in the table above mainly include ¥86,734 million of private placement debt conduit bonds. (2) MUFG Americas Holdings Corporation (“MUFG Americas Holdings” or “MUAH”) reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity At September 30, 2020: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 33,645,301 ¥ 180,810 ¥ 16,643 ¥ 33,809,468 Japanese prefectural and municipal bonds 3,328,438 16,585 1,517 3,343,506 Foreign government and official institution bonds 2,706,767 123,091 2,281 2,827,577 Corporate bonds 1,209,772 12,236 721 1,221,287 Residential mortgage-backed securities 1,375,478 11,216 1,100 1,385,594 Commercial mortgage-backed securities 417,732 26,960 1,391 443,301 Asset-backed securities 1,262,027 7,218 4,503 1,264,742 Other debt securities 275,245 3,099 1,326 277,018 Commercial paper 440,010 48 — 440,058 Total ¥ 44,660,770 ¥ 381,263 ¥ 29,482 ¥ 45,012,551 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,508 ¥ 26,632 ¥ — ¥ 1,127,140 Foreign government and official institution bonds 133,970 2,043 — 136,013 Residential mortgage-backed securities 605,042 25,670 — (1) 630,712 Commercial mortgage-backed securities 134,202 6,108 15 (1) 140,295 Asset-backed securities 1,956,524 154 18,783 1,937,895 Total ¥ 3,930,246 ¥ 60,607 ¥ 18,798 ¥ 3,972,055 Note: (1) 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 debt securities Available-for-sale Amortized Fair value Fair value (in millions) Due in one year or less ¥ 18,595 ¥ 18,649 ¥ 20,830,504 Due from one year to five years 1,191,186 1,221,061 11,185,978 Due from five years to ten years 610,998 614,175 6,838,352 Due after ten years 2,109,467 2,118,170 6,157,717 Total ¥ 3,930,246 ¥ 3,972,055 ¥ 45,012,551 Realized Gains and Losses For the six months ended September 30, 2019 and 2020, gross realized gains on sales of Available-for-sale Available-for-sale million and ¥ Impairment Losses on Investment Securities For the six months ended September 30 , 2019 the Available-for-sale For the six months ended September 30 , Available-for-sale Held-to-maturity Available-for-sale , Available-for-sale For Held-to-maturity expected life is required to be provided. Held-to-maturity except Gross Unrealized Losses and Fair Value The following tables show the gross unrealized losses and fair value of Available-for-sale Held-to-maturity . From the six months ended September 30, 2020, the table does not include the securities for which an allowance for credit losses has been recorded: Less than 12 months 12 months or more Total At March 31, 2020: 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 ¥ 11,781,600 ¥ 30,961 ¥ — ¥ — ¥ 11,781,600 ¥ 30,961 202 Japanese prefectural and municipal bonds 935,540 2,202 — — 935,540 2,202 340 Foreign government and official institution bonds 564,620 5,481 114,407 547 679,027 6,028 153 Corporate bonds 522,941 1,191 25,228 14 548,169 1,205 154 Residential mortgage-backed securities 114,057 530 388,064 3,801 502,121 4,331 402 Commercial mortgage-backed securities 182,887 3,087 1,304 2 184,191 3,089 39 Asset-backed securities 189,775 503 86,605 620 276,380 1,123 94 Other debt securities 53,070 132 30,657 1,824 83,727 1,956 24 Total ¥ 14,344,490 ¥ 44,087 ¥ 646,265 ¥ 6,808 ¥ 14,990,755 ¥ 50,895 1,408 Held-to-maturity Foreign government and official institution bonds ¥ 55,746 ¥ 689 ¥ — ¥ — ¥ 55,746 ¥ 689 9 Residential mortgage-backed securities 108,478 1,033 360,841 1,979 469,319 3,012 281 Commercial mortgage-backed securities 10,281 32 133,791 285 144,072 317 31 Asset-backed securities 637,201 8,536 1,259,720 19,180 1,896,921 27,716 77 Total ¥ 811,706 ¥ 10,290 ¥ 1,754,352 ¥ 21,444 ¥ 2,566,058 ¥ 31,734 398 Less than 12 months 12 months or more Total At September 30, 2020: 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 ¥ 12,651,521 ¥ 16,634 ¥ 733 ¥ 9 ¥ 12,652,254 ¥ 16,643 186 Japanese prefectural and municipal bonds 715,401 1,517 — — 715,401 1,517 262 Foreign government and official institution bonds 261,083 2,278 36,846 3 297,929 2,281 42 Corporate bonds 402,062 718 4,417 3 406,479 721 136 Residential mortgage-backed securities 168,166 400 117,942 700 286,108 1,100 201 Commercial mortgage-backed securities 30,431 1,391 — — 30,431 1,391 36 Asset-backed securities 204,689 2,735 51,321 1,768 256,010 4,503 110 Other debt securities 170,762 300 19,903 1,026 190,665 1,326 60 Total ¥ 14,604,115 ¥ 25,973 ¥ 231,162 ¥ 3,509 ¥ 14,835,277 ¥ 29,482 1,033 Evaluating Available-for-sale The following describes the nature of the MUFG Group’s Available-for-sale Japanese national government and Japanese government agency bonds, Foreign government and official institution bonds As of September 30, 2020, unrealized losses associated with these securities were deemed to be attributable to changes in market interest rates rather than a deterioration in the creditworthiness of the underlying obligor. Based on a consideration of factors, including cash flow analysis, the MUFG Group expects to recover the entire amortized cost basis of these securities. Accordingly, no credit loss was identified as of September 30, 2020 and no impairment loss has been recorded. Corporate bonds As of September 30, 2020, unrealized losses associated with corporate bonds were primarily related to private placement bonds issued by Japanese non-public Residential mortgage-backed securities As of September 30, 2020, 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 determined through analysis that no credit loss was identified on such securities as of September 30, 2020 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 September 30, 2020, unrealized losses on these securities were primarily driven by certain 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 credit loss and confirms the intent and ability to hold these securities until recovery. Based on the analysis performed, no credit loss was identified as of September 30, 2020 and no impairment loss has been recorded. Other debt securities As of September 30, 2020, 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 credit loss, 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 credit loss was identified as of September 30, 2020. Equity Securities The following table presents net realized gains (losses) on sales of equity securities, and net unrealized gains (losses) on equity securities still held at September 30, 2019 and 2020. Six months ended 2019 2020 (in millions) Net gains (losses) recognized during the period (1) ¥ (36,019 ) ¥ 683,303 Less: Net gains (losses) recognized during the period on equity securities sold during the period (9,960 ) 17,136 Net unrealized gains (losses) recognized during the reporting period still held at the reporting date ¥ (26,059 ) ¥ 666,167 Note: (1) Included in Investment securities gains—net. Measurement Alternative of Equity Securities The following table presents the carrying value of nonmarketable equity securities held at March 31, 2020 and September 30, 2020. March 31, September 30, (in millions) Measurement alternative balance ¥ 534,882 ¥ 323,990 The related adjustments for these securities during the six months ended September 30, 2019 and 2020 were as follow. Six months ended 2019 2020 (in millions) Measurement alternative impairment losses (1)(4) ¥ (1,402 ) ¥ (2,984 ) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ (953 ) ¥ — Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ 162 ¥ 3,685 Notes: (1) Included in Investment securities gains—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 downward or upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities. (4) The cumulative impairment losses at March 31, 2020 and September 30, 2020 were ¥5,007 million and ¥7,925 million, respectively. (5) The cumulative downward changes for observable prices at March 31, 2020 and September 30, 2020 were ¥953 million and ¥953 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2020 and September 30, 2020 were ¥34,466 million and ¥36,782 million, respectively.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses [Text Block]	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Loans and Allowance for Credit Losses [Text Block]	4. LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans at March 31, 2020 and September 30, 2020 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. March 31, September 30, (in millions) Domestic: Manufacturing ¥ 11,448,778 ¥ 13,580,404 Construction 733,212 729,357 Real estate 12,054,671 12,254,948 Services 2,585,111 2,915,608 Wholesale and retail 7,504,561 7,778,422 Banks and other financial institutions (1) 5,161,093 5,043,357 Communication and information services 1,572,344 1,486,217 Other industries 8,673,871 9,420,430 Consumer 15,319,721 14,962,766 Total domestic 65,053,362 68,171,509 Foreign: Governments and official institutions 726,347 692,943 Banks and other financial institutions (1) 11,788,225 10,700,402 Commercial and industrial 32,565,030 29,877,321 Other 8,404,062 7,625,703 Total foreign 53,483,664 48,896,369 Unearned income, unamortized premiums—net and deferred loan fees—net (350,287 ) (319,759 ) Total (2) ¥ 118,186,739 ¥ 116,748,119 Notes: (1) Loans to so-called “non-bank Non-bank (2) The above table includes loans held for sale of ¥344,790 million at March 31, 2020 and ¥315,142 million at September 30, 2020, respectively. The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUFG Americas Holdings, Bank of Ayudhya Public Company Limited (“Krungsri”), and Other 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. See Note 1 to the consolidated financial statements for the fiscal year ended March 31, 2020 for further information. Effective as of April 1, 2020, all of the domestic classes within the Commercial segment were combined into one class. 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 to the consolidated financial statements for the fiscal year ended March 31, 2020 for further information. The information on nonaccrual loans by class at March 31, 2020 and September 30, 2020, and recognized interest income on nonaccrual loans by class for the six months ended September 30, 2020 are shown below: March 31, 2020: Nonaccrual (1) (in millions) Commercial Domestic ¥ 312,972 Foreign 127,001 Residential 63,998 Card 61,172 MUAH 35,840 Krungsri 149,732 Other 27,754 Total ¥ 778,469 Recorded Loan Balance September 30, 2020: Nonaccrual (1) Nonaccrual Loans (2) Recognized (in millions) Commercial Domestic ¥ 357,412 ¥ 112,770 ¥ 2,229 Foreign 184,317 53,354 2,061 Residential 71,976 4,188 488 Card 62,012 641 20 MUAH 63,782 16,007 483 Krungsri 172,239 3,338 3,498 Other 43,464 — 3,153 Total ¥ 955,202 ¥ 190,298 ¥ 11,932 Notes: (1) Nonaccrual loans in the above table do not include loans held for sale of ¥330 million and ¥6,767 million at March 31, 2020 and September 30, 2020, respectively, and do not include loans acquired with deteriorated credit quality of ¥25,427 million at March 31, 2020. (2) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the Troubled Debt Restructurings The following table summarizes the MUFG Group’s TDRs by class for the six months ended September 30, 2019 and 2020: Six months ended September 30, 2019: Troubled Debt Troubled Debt Pre- Post- Recorded (in millions) Commercial (1)(3) Domestic ¥ 20,607 ¥ 20,607 ¥ 6,342 Foreign 29,360 29,360 — Residential (1)(3) 3,215 3,215 27 Card (2)(3) 11,900 11,362 1,825 MUAH (2)(3) 18,766 18,656 4,572 Krungsri (2)(3) 16,724 16,695 3,815 Other (2) 5,117 5,117 — Total ¥ 105,689 ¥ 105,012 ¥ 16,581 Six months ended September 30, 2020: Troubled Debt Troubled Debt Pre- Post- Recorded (in millions) Commercial (1)(3) Domestic ¥ 43,717 ¥ 43,717 ¥ 9,280 Foreign 10,292 10,292 3,940 Residential (1)(3) 27,985 27,985 41 Card (2)(3) 10,694 10,185 1,556 MUAH (2)(3) 13,958 13,920 3,113 Krungsri (2)(3) 9,130 9,130 1,875 Other (2)(3) 7,121 7,109 180 Total ¥ 122,897 ¥ 122,338 ¥ 19,985 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, Krungsri and Other segments include accrual and nonaccrual loans. (3) For the six months ended September 30, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial and Residential segments, reduction in the stated rate was the primary concession type in the Card segment, and some combination thereof were the primary concession type in the MUFG Americas Holdings and Krungsri segments. For the six months ended September 30, 2020, 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 and Other segments and forbearance was the primary concession type in the MUFG Americas Holdings segment. 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. 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, Krungsri and Other 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. In the MUFG Americas Holdings segment, TDR accounting was suspended for loan modifications that occurred from March 1, 2020, through June 30, 2020, where COVID-19 COVID-19 In the Krungsri segment, TDR accounting was suspended for loan modifications that occurred during the six months ended June 30, 2020, where COVID-19 Credit Quality Indicator Credit quality indicators of loans by class at March 31, 2020 are shown below: At March 31, 2020: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,695,889 ¥ 1,186,044 ¥ 220,245 ¥ 51,102,178 Foreign 34,719,041 636,523 128,073 35,483,637 Loans acquired with deteriorated credit quality 8,255 9,739 18,978 36,972 Total ¥ 84,423,185 ¥ 1,832,306 ¥ 367,296 ¥ 86,622,787 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,256,744 ¥ 61,746 ¥ 13,318,490 Card ¥ 504,357 ¥ 61,286 ¥ 565,643 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,590,805 ¥ 15,119 ¥ 4,877,863 ¥ 87,648 ¥ 84,033 ¥ 9,655,468 Performing Under- Non-Performing Total (1) (in millions) Krungsri ¥ 6,241,696 ¥ 508,847 ¥ 161,047 ¥ 6,911,590 Accrual Nonaccrual Total (1) (in millions) Other ¥ 1,086,517 ¥ 31,376 ¥ 1,117,893 Credit quality indicators of loans and year of origination by class at September 30, 2020 are shown below: Term Loans Revolving Revolving Total (1) At September 30, 2020: 2020 2019 2018 2017 2016 Prior (in millions) Commercial: ¥ 21,726,648 ¥ 13,635,192 ¥ 10,586,577 ¥ 6,294,885 ¥ 5,423,100 ¥ 8,805,508 ¥ 19,434,719 ¥ 14,706 ¥ 85,921,335 Domestic 17,012,671 8,041,145 6,880,626 4,386,030 4,136,969 6,499,262 7,591,943 — 54,548,646 Normal 16,731,403 7,793,705 6,708,236 4,212,921 4,037,026 6,019,442 7,294,686 — 52,797,419 Close Watch 266,470 231,540 155,590 158,486 75,883 347,677 273,753 — 1,509,399 Likely to become Bankrupt or Legally/Virtually Bankrupt 14,798 15,900 16,800 14,623 24,060 132,143 23,504 — 241,828 Foreign 4,713,977 5,594,047 3,705,951 1,908,855 1,286,131 2,306,246 11,842,776 14,706 31,372,689 Normal 4,592,892 5,467,471 3,572,056 1,811,264 1,223,744 2,138,758 11,664,163 14,706 30,485,054 Close Watch 115,006 74,537 106,742 91,792 60,835 90,305 165,238 — 704,455 Likely to become Bankrupt or Legally/Virtually Bankrupt 6,079 52,039 27,153 5,799 1,552 77,183 13,375 — 183,180 Residential ¥ 257,477 ¥ 748,682 ¥ 779,669 ¥ 875,938 ¥ 1,312,073 ¥ 9,083,685 ¥ 35,158 ¥ 8 ¥ 13,092,690 Accrual 257,309 748,210 779,153 875,057 1,310,291 9,019,418 32,916 — 13,022,354 Nonaccrual 168 472 516 881 1,782 64,267 2,242 8 70,336 Card ¥ 615 ¥ 1,350 ¥ 2,226 ¥ 651 ¥ 177 ¥ 7,807 ¥ 447,708 ¥ 59,329 ¥ 519,863 Accrual 559 1,183 1,890 330 69 6,623 432,578 14,619 457,851 Nonaccrual 56 167 336 321 108 1,184 15,130 44,710 62,012 MUAH (2) ¥ 812,392 ¥ 1,640,547 ¥ 1,141,188 ¥ 1,157,236 ¥ 989,283 ¥ 1,634,056 ¥ 1,947,184 ¥ — ¥ 9,321,886 Credit Quality Based on the Number of Delinquencies Accrual 224,531 815,376 480,089 771,203 692,337 854,594 155,253 — 3,993,383 Nonaccrual — 323 539 862 862 19,285 431 — 22,302 Credit Quality Based on Internal Credit Ratings Pass 578,811 774,425 577,062 367,717 281,755 663,880 1,652,947 — 4,896,597 Special Mention 3,663 44,066 69,492 11,313 13,683 45,790 73,155 — 261,162 Classified 5,387 6,357 14,006 6,141 646 50,507 65,398 — 148,442 Krungsri ¥ 773,460 ¥ 1,369,075 ¥ 1,112,319 ¥ 617,690 ¥ 334,566 ¥ 509,080 ¥ 2,101,674 ¥ 11,964 ¥ 6,829,828 Performing 751,398 1,261,184 972,167 528,286 283,029 407,251 1,932,692 — 6,136,007 Under-performing 19,249 81,332 108,811 71,709 37,575 61,834 141,072 — 521,582 Non-performing 2,813 26,559 31,341 17,695 13,962 39,995 27,910 11,964 172,239 Other ¥ 204,235 ¥ 267,571 ¥ 142,773 ¥ 57,223 ¥ 17,434 ¥ 12,055 ¥ 365,843 ¥ — ¥ 1,067,134 Accrual 203,021 256,046 132,678 53,381 16,357 11,201 350,986 — 1,023,670 Nonaccrual 1,214 11,525 10,095 3,842 1,077 854 14,857 — 43,464 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 Federal Deposit Insurance Corporation (“FDIC”) covered loans which are not individually rated totaling ¥365 million and nil at March 31, 2020 and September 30, 2020, 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. For a discussion and explanation of the MUFG Group’s credit quality indicator, see Note 4 to the consolidated financial statements for the fiscal year ended March 31, 2020. Effective as of April 1, 2020, the category of the Krungsri segment’s credit quality indicator was changed to Performing, Under-performing, and Non-performing. Non-performing For the Commercial, Residential and Card segments, credit quality indicators at March 31, 2020 and September 30, 2020 are based on information as of March 31, 2020 and September 30, 2020, respectively. For the MUFG Americas Holdings, Krungsri and Other segments, credit quality indicators at March 31, 2020 and September 30, 2020 are generally based on information as of December 31, 2019 and June 30, 2020, respectively. Past Due Analysis Ages of past due loans by class at March 31, 2020 and September 30, 2020 are shown below: At March 31, 2020: 1-3 months Greater Total Current Total (1) 90 Days and (in millions) Commercial Domestic ¥ 9,215 ¥ 26,971 ¥ 36,186 ¥ 51,065,992 ¥ 51,102,178 ¥ 4,720 Foreign 9,927 23,548 33,475 35,450,162 35,483,637 164 Residential 48,404 15,443 63,847 13,248,278 13,312,125 6,288 Card 14,735 29,997 44,732 518,008 562,740 — MUAH 31,052 14,435 45,487 9,603,339 9,648,826 2,101 Krungsri 160,253 129,186 289,439 6,616,104 6,905,543 — Other 16,442 24,348 40,790 1,069,186 1,109,976 — Total ¥ 290,028 ¥ 263,928 ¥ 553,956 ¥ 117,571,069 ¥ 118,125,025 ¥ 13,273 At September 30, 2020: 1-3 months Greater Total Current Total (1) 90 Days and (in millions) Commercial Domestic ¥ 15,794 ¥ 23,739 ¥ 39,533 ¥ 54,509,113 ¥ 54,548,646 ¥ 5,211 Foreign 16,084 35,918 52,002 31,320,687 31,372,689 331 Residential 45,852 33,119 78,971 13,013,719 13,092,690 13,015 Card 12,262 29,905 42,167 477,696 519,863 — MUAH 65,796 20,346 86,142 9,235,744 9,321,886 7,867 Krungsri 198,923 130,468 329,391 6,500,437 6,829,828 — Other 26,290 38,887 65,177 1,001,957 1,067,134 — Total ¥ 381,001 ¥ 312,382 ¥ 693,383 ¥ 116,059,353 ¥ 116,752,736 ¥ 26,424 Note: (1) At March 31, 2020, 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. At September 30, 2020, 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. Allowance for Credit Losses Effective as o Under the new guidance, the MUFG Group maintains an allowance for credit losses, which is a valuation account that is deducted from the amortized cost basis of the loans to present the net amount expected to be collected on the loans. The amount necessary to adjust the allowance for credit losses for management’s current estimate of expected credit losses on loans is reported in net income as a credit loss expense. The methodologies used to estimate the allowance for the major portfolio segments are as follows: Commercial segment In the Commercial segment, expected credit losses of loans are measured on a collective basis when similar risk characteristics exist. Risk characteristics that are considered for aggregation of loans include internal credit ratings, geographical location, and industry of the borrower. The collectively-assessed allowance is measured over the contractual term of the loans that is adjusted for expected prepayments, using probability of default (“PD”), loss given default (“LGD”) and exposure at default (“EAD”) loss forecasting model, which is based on historical information and adjusted to incorporate expectations of future economic conditions considering economic variables such as gross domestic product and unemployment rate. The PD is determined as the marginal PD that denotes the likelihood that a borrower is observed to experience the default during a defined period of time, based on internal credit rating, geographical location, or industry of the borrower. two-year The allowance for loans that have been modified into a TDR or reasonably expected to be modified TDR are measured on an individual basis. 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. Residential segment In the Residential segment, the loans are comprised of smaller-balance homogeneous loans and expected credit losses of loans are measured on a collective basis. The allowance for credit losses is measured over the contractual term of the loans that is adjusted for expected prepayments, using state transition probability matrix, which captures delinquency status changes and prepayments by loans’ remaining term, and is based on historical information and adjusted to incorporate expectations of future economic conditions considering economic variables, such as unemployment rate. The LGD is also used to capture the estimated loss on the loan that would be realized upon the default of the borrower. The allowance methodology incorporates an economic forecast over a three-year period. Beyond the three-year economic forecast, the allowance methodology reverts to average historical loss information on a straight-line basis over two-year The allowance for loans that have been modified into a TDR or reasonably expected to be modified TDR are measured on an individual basis. 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. Card segment In the Card segment, the loans are smaller-balance homogeneous loans and expected credit losses of loans are measured on a collective basis. The allowance for credit losses is measured over the contractual term of the loans that is adjusted for expected prepayments, using state transition probability matrix, which captures delinquency status changes and prepayments by loans’ remaining term, and is based on historical information and adjusted to incorporate expectations of future economic conditions considering economic variables, such as unemployment rate. The collectively-assessed allowance methodology incorporates an economic forecast over a three-year period. Beyond the three-year economic forecast, the allowance methodology reverts to average historical loss information. The allowance for loans that have been modified into a TDR or reasonably expected to be modified TDR are measured on an individual basis, 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. MUFG Americas Holdings segment In the MUFG Americas Holdings segment, expected credit losses are measured on a collective basis when similar risk characteristics exist. The allowance for credit loss is calculated as the product of PD, LGD, and EAD modeled parameters that are projected on a monthly basis over the assets’ remaining contractual lives. The sum of each month’s expected loss calculation results in the collectively-assessed allowance estimate. Expected loss models use historical loss information and a variety of economic assumptions that considers economic variables such as gross domestic product and unemployment rate, to estimate PD, LGD, and EAD. These models are tailored to different loan segments, classes and products by changing the economic variables or their weighting in the calculation used to estimate expected losses. The collectively-assessed allowance methodology incorporates an economic forecast over a three-year period. Beyond the three-year economic forecast, the allowance methodology reverts to average historical loss information on a straight-line basis over two-year Management implements qualitative adjustments to the collectively-assessed allowance to account for the risks not incorporated in the model between current conditions and those reflected in the historical loss information used to estimate the models. These qualitative factors include changes in credit policies, problem loan trends, identification of new risks not incorporated into the modeling framework, credit concentrations, changes in lending management and other external factors. Qualitative adjustments are also used to adjust the collectively-assessed allowance to account for risks attributed to imprecision in the economic forecast and when risks emerge that impact specific portfolio components (i.e., natural disasters). The allowance for loans that have been modified into a TDR or reasonably expected to be modified TDR are measured either individually or in pools with similar risk characteristics. The allowance for individually assessed TDR loans can be measured using a discounted cash flow methodology, or by evaluating the fair value of the collateral, if collateral dependent. When the value of a concession cannot be measured using a method other than the discounted cash flow method, the value of a concession is measured by discounting the expected future cash flows at the original interest rate of the loan. Krungsri segment In the Krungsri segment, expected credit losses are measured on a collective basis for portfolios of loans that share similar economic risk characteristics. Expected credit losses are a probability-weighted estimate of the present value of credit losses. These are measured as the present value of the difference between the cash flows under the contract and the cash flows expected to be received arising from the weighting of multiple future economic scenarios that considers economic variables such as gross domestic product and unemployment rate, discounted at the loan’s effective interest rate. The qualitative adjustment is made where considered appropriate. Loans that do not share risk characteristics are evaluated individually to determine the allowance balance. Individually-assessed allowance is measured based on the present value of expected future cash flows discounted at the loan’s original effective interest rate, or the fair value of the collateral if the loan is collateral dependent. The allowance for loans that have been modified into a TDR or reasonably expected to be modified TDR are measured on an individual basis. 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. In all segments, when estimating the allowance for credit losses, significant management assumptions are incorporated in economic variables, qualitative adjustments, or both to capture the heightened volatility and uncertainty in the economy due to the COVID-19 Changes in the allowance for credit losses of loans by portfolio segment for the six months ended September 30, 2019 and 2020 are shown below: Six months ended September 30, 2019: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ — ¥ 658,184 Provision for credit losses 28,388 130 14,456 17,950 24,902 16,295 102,121 Charge-offs 29,033 2,093 12,715 16,266 36,240 6,223 102,570 Recoveries collected 15,612 355 721 2,791 11,115 2,420 33,014 Net charge-offs 13,421 1,738 11,994 13,475 25,125 3,803 69,556 Other (1) (3,410 ) — — (1,613 ) 3,568 1,379 (76 ) Balance at end of period ¥ 401,172 ¥ 37,018 ¥ 35,012 ¥ 55,443 ¥ 148,157 ¥ 13,871 ¥ 690,673 Six months ended September 30, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Effect of adopting new guidance on measurement of credit losses on financial instruments (2) 83,828 49,494 14,262 25,037 118,333 32,750 323,704 Provision for (reversal of) credit losses 37,154 (947 ) 8,822 89,812 47,529 27,436 209,806 Charge-offs 34,833 997 11,230 17,453 44,882 25,795 135,190 Recoveries collected 3,362 7 486 1,749 11,405 2,528 19,537 Net charge-offs 31,471 990 10,744 15,704 33,477 23,267 115,653 Other (1) (3,968 ) — — (1,757 ) (10,860 ) (2,277 ) (18,862 ) Balance at end of period ¥ 567,818 ¥ 82,303 ¥ 47,520 ¥ 156,383 ¥ 291,151 ¥ 63,360 ¥ 1,208,535 Notes: (1 ) Other is principally comprised of gains or losses from foreign exchange translation. (2 ) See Note 1 for more information. Allowance for credit losses and recorded investment in loans by portfolio segment at March 31, 2020 are shown below: At March 31, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 364,079 ¥ 12,651 ¥ 19,799 ¥ 5,977 ¥ 30,198 ¥ 5,073 ¥ 437,777 Collectively evaluated for impairment 108,100 21,130 15,369 53,013 139,401 22,566 359,579 Loans acquired with deteriorated credit quality (2) 10,096 965 12 5 27 1,079 12,184 Total ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Loans: Individually evaluated for impairment ¥ 944,988 ¥ 92,448 ¥ 65,292 ¥ 67,719 ¥ 98,959 ¥ 17,512 ¥ 1,286,918 Collectively evaluated for impairment 85,640,827 13,219,677 497,448 9,581,107 6,806,584 1,092,464 116,838,107 Loans acquired with deteriorated credit quality (2) 36,972 6,365 2,903 7,007 6,047 7,917 67,211 Total (1) ¥ 86,622,787 ¥ 13,318,490 ¥ 565,643 ¥ 9,655,833 ¥ 6,911,590 ¥ 1,117,893 ¥ 118,192,236 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. The MUFG Group sold ¥816 billion and ¥613 billion of loans within the Commercial segment during the six months ended September 30, 2019 and 2020, respectively. The MUFG Group consolidates certain subsidiaries based on financial information for the year ended December 31 as this date and MUFG’s fiscal year which ends on March 31 have been treated as coterminous. For the six months off-balance Collateral Dependent Loans The MUFG Group uses, as a practical expedient, the fair value of the collateral when recording the net carrying amounts of loans and determining the allowance for credit losses of such loans, for which the repayment is expected to be provided substantially through the operation or sale of the collateral, when the borrower is experiencing financial difficulty based on the assessment as of the reporting date. As of September 30, 2020, for the Commercial, MUFG Americas Holdings, Krungsri and Other segments, collateral relating to these loans comprised of real estate, exchange traded equity securities and deposits, etc., and primarily collateral type was real estate. For the Residential segment, collateral on these loans was mainly real estate. There were no significant changes in the extent to which collateral secures these loans for the six months. Other Financial Receivable Accounts receivable-Other, which is one of the components in Other assets in Note 14 to the consolidated financial statements for the fiscal year ended March 31, 2020, of ¥1,117,650 million as of September 30, 2020, were primarily comprised of receivables relating to card business. The provision or reversal of the allowance for credit losses relating to the receivables was included in Non-interest (1-3 greater than The outstanding balance of these account receivables are presented on a net basis after allowance for credit losses. Upon adoption of the new guidance on measurement of credit losses on financial instruments as of April 1, 2020, the amount of the allowance for credit losses increased by ¥10,248 million. The change of allowance for credit losses during the period ended September 30, 2020 is primarily due to provision or reversal of the allowance for the receivables. There are de minimis Accrued interest receivable totaled and is

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets [Text Block]	6 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets [Text Block]	5. GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill The table below presents the movement in the carrying amount of goodwill during the six months ended September 30, 2019 and 2020: Six months ended 2019 2020 (in millions) Balance at beginning of period Goodwill (1) ¥ 626,009 ¥ 1,093,554 Accumulated impairment losses (1) (192,118 ) (575,928 ) 433,891 517,626 Goodwill acquired during the six months (2) 446,643 3,990 Impairment loss (241,356 ) (106,479 ) Foreign currency translation adjustments and other (22,558 ) (10,128 ) Balance at end of period Goodwill 1,050,094 1,087,416 Accumulated impairment losses (433,474 ) (682,407 ) ¥ 616,620 ¥ 405,009 Notes: (1 ) Goodwill originally recognized of 2019, is not included in the table above. (2 ) See Note 2 for the goodwill acquired in connection with acquisitions. The impairment losses on goodwill for the six months ended September 30, 2019 were ¥241,356 million and relating to Danamon reporting unit, which is included in impairment of goodwill in the accompanying condensed consolidated statements of income. In determining the acquisition price of Bank Danamon, the results of multiple valuation techniques were considered with an expectation to benefit from Danamon’s foothold in the developing local retail and SME segments to deepen its banking franchise in Indonesia. After the acquisition of Danamon by MUFG Bank, Danamon’s market capitalization decreased. As a result, the fair value of the reporting unit as an exit price was measured on June 30, 2019 for the quantitative goodwill impairment test, and led to impairment of goodwill as the fair value had fallen below the carrying amount of the reporting unit, including goodwill, reflecting a reduction in stock price as well as changes in the inputs to the valuation techniques in comparison to those considered in determining the acquisition price such as discount rate. The measurement of the fair value of the reporting unit was primarily based on a market approach, and was also corroborated by multiple valuation techniques. The impairment losses on goodwill for the six months ended September 30, 2020 were ¥106,479 million and relating to MUAH reporting unit. Due to economic environment triggered by COVID-19, as COVID-19 Other Intangible Assets The table below presents the net carrying amount by major class of other intangible assets at March 31, 2020 and September 30, 2020: March 31, September 30, (in millions) Intangible assets subject to amortization: Software (1) ¥ 755,638 ¥ 764,940 Customer relationships 303,250 276,802 Core deposit intangibles 74,780 67,642 Trade names 56,693 53,311 Other 11,605 10,915 Total 1,201,966 1,173,610 Intangible assets not subject to amortization: Other (2) 37,560 25,630 Total ¥ 1,239,526 ¥ 1,199,240 Notes: (1 ) As a result of adopting new guidance, costs for implementation activities in certain hosting arrangements are capitalized as software. (2 ) Intangible assets not subject to amortization includes mortgage servicing rights accounted for at fair value of ¥29,641 million and ¥15,274 million at March 31, 2020 and September 30, 2020, respectively.

Lease Transactions _Text Block_

Lease Transactions [Text Block]	6 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Lease Transactions [Text Block]	6. LEASE TRANSACTIONS Lease transactions as a lessor As part of its financing activities, the MUFG Group enters into leasing arrangements with customers. The MUFG Group’s leasing operations are conducted through leasing subsidiaries and consist principally various types of data processing equipment, office equipment and transportation equipment. Financing leases are presented in loans. In certain case, the MUFG Group requests lessees to deposit in amount nearly or equal to residual value of leased assets. The following table presents profit or loss of lease transactions as a lessor for the six months ended September 30, 2019 and September 30, 2020: September 30, September 30, (in millions) Financing leases: Finance income on net investment ¥ 59,058 ¥ 64,748 Operating leases: Lease income ¥ 1,917 ¥ 2,025 Total ¥ 60,975 ¥ 66,773 Finance income on net investment is included in Interest income—Loans, including fees in the condensed consolidated statements of income. Lease income from operating lease transactions is included in Other non-interest income in the condensed consolidated statements of income.

Pledged Assets and Collateral _

Pledged Assets and Collateral [Text Block]	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Pledged Assets and Collateral [Text Block]	7. PLEDGED ASSETS AND COLLATERAL At September 30, 2020, assets mortgaged, pledged, or otherwise subject to lien were as follows: September 30, (in millions) Trading account securities ¥ 9,578,255 Investment securities 18,831,013 Loans 13,827,599 Other 16,775 Total ¥ 42,253,642 The above pledged assets were classified by type of liabilities to which they related as follows: September 30, (in millions) Deposits ¥ 215,110 Payables under repurchase agreements and securities lending transactions 14,638,080 Other short-term borrowings and long-term debt 27,374,865 Other 25,587 Total ¥ 42,253,642 At September 30, 2020, certain investment securities, principally Japanese national government and Japanese government agency bonds, loans and other assets with a combined carrying value of ¥21,322,674 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 At March 31, 2020 and September 30, 2020, the cash collateral pledged for derivative transactions, which is included in Other assets, was ¥1,696,108 million and ¥1,484,866 million, respectively, and the cash collateral received for derivative transactions, which is included in Other liabilities, was ¥1,125,305 million and ¥1,108,155 million, respectively.

Severance Indemnities and Pensi

Severance Indemnities and Pension Plans [Text Block]	6 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Severance Indemnities and Pension Plans [Text Block]	8. SEVERANCE INDEMNITIES AND PENSION PLANS The following table summarizes the components of net periodic benefit costs of pension benefits, severance indemnities plans (“SIPs”) and other benefits for the six months ended September 30, 2019 and 2020: Six months ended September 30, Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Pension Pension Pension Other Pension Other (in millions) Service cost—benefits earned during the period ¥ 24,585 ¥ 23,695 ¥ 6,550 ¥ 175 ¥ 7,354 ¥ 117 Interest cost on projected benefit obligation 5,545 5,596 8,667 575 7,255 402 Expected return on plan assets (37,585 ) (35,577 ) (15,847 ) (949 ) (15,785 ) (1,072 ) Amortization of net actuarial loss 2,602 8,547 4,915 556 8,158 125 Amortization of prior service cost (602 ) (602 ) (1,332 ) (948 ) (1,309 ) (226 ) Loss (gain) on settlements and curtailment (2,347 ) (1,084 ) 185 — — — Net periodic benefit cost (income) ¥ (7,802 ) ¥ 575 ¥ 3,138 ¥ (591 ) ¥ 5,673 ¥ (654 )

Offsetting of Derivatives, Repu

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block]	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block]	9. OFFSETTING OF DERIVATIVES, REPURCHASE AGREEMENTS, AND SECURITIES LENDING TRANSACTIONS The following tables present, as of March 31, 2020 and September 30, 2020, 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 condensed 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 condensed 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 condensed consolidated balance sheet” column in the tabular disclosure below. Gross amounts of Gross amounts Net amounts Gross amounts not offset At March 31, 2020 consolidated balance sheet Financial Cash collateral Net amounts (in billions) Financial assets: Derivative assets ¥ 14,958 ¥ — ¥ 14,958 ¥ (11,282 ) ¥ (874 ) ¥ 2,802 Receivables under resale agreements 25,884 (1,888 ) 23,996 (23,195 ) (21 ) 780 Receivables under securities borrowing transactions 3,444 — 3,444 (3,336 ) — 108 Total ¥ 44,286 ¥ (1,888 ) ¥ 42,398 ¥ (37,813 ) ¥ (895 ) ¥ 3,690 Financial liabilities: Derivative liabilities ¥ 14,034 ¥ — ¥ 14,034 ¥ (11,296 ) ¥ (1,140 ) ¥ 1,598 Payables under repurchase agreements 33,733 (1,883 ) 31,850 (31,569 ) (34 ) 247 Payables under securities lending transactions 1,017 — 1,017 (986 ) — 31 Obligations to return securities received as collateral 4,806 — 4,806 (1,966 ) — 2,840 Total ¥ 53,590 ¥ (1,883 ) ¥ 51,707 ¥ (45,817 ) ¥ (1,174 ) ¥ 4,716 Gross amounts of Gross amounts Net amounts Gross amounts not offset At September 30, 2020 consolidated Financial Cash collateral Net amounts (in billions) Financial assets: Derivative assets ¥ 13,673 ¥ — ¥ 13,673 ¥ (10,188 ) ¥ (741 ) ¥ 2,744 Receivables under resale agreements 15,706 (1,655 ) 14,051 (13,308 ) (34 ) 709 Receivables under securities borrowing transactions 3,199 — 3,199 (3,101 ) — 98 Total ¥ 32,578 ¥ (1,655 ) ¥ 30,923 ¥ (26,597 ) ¥ (775 ) ¥ 3,551 Financial liabilities: Derivative liabilities ¥ 12,636 ¥ — ¥ 12,636 ¥ (10,204 ) ¥ (1,129 ) ¥ 1,303 Payables under repurchase agreements 28,081 (1,633 ) 26,448 (25,935 ) (42 ) 471 Payables under securities lending 842 — 842 (809 ) (2 ) 31 Obligations to return securities received as 5,146 — 5,146 (1,339 ) — 3,807 Total ¥ 46,705 ¥ (1,633 ) ¥ 45,072 ¥ (38,287 ) ¥ (1,173 ) ¥ 5,612

Repurchase Agreements and Secur

Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block]	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block]	10. 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, 2020 and September 30, 2020. 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, 2020 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 9,685 ¥ 16,608 ¥ 4,496 ¥ 2,944 ¥ 33,733 Payables under securities lending transactions 934 64 19 — 1,017 Obligations to return securities received as collateral 3,856 599 276 75 4,806 Total ¥ 14,475 ¥ 17,271 ¥ 4,791 ¥ 3,019 ¥ 39,556 September 30, 2020 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 11,591 ¥ 12,592 ¥ 1,563 ¥ 2,335 ¥ 28,081 Payables under securities lending transactions 819 — 23 — 842 Obligations to return securities received as collateral 4,505 239 258 144 5,146 Total ¥ 16,915 ¥ 12,831 ¥ 1,844 ¥ 2,479 ¥ 34,069 Secured borrowing by the class of collateral pledged at March 31, 2020 and September 30, 2020 was as follows: March 31, 2020 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 10,687 ¥ 38 ¥ 2,241 ¥ 12,966 Foreign government and official institution bonds 17,326 57 873 18,256 Corporate bonds 784 — 183 967 Residential mortgage-backed securities 4,248 — 10 4,258 Other debt securities 157 — 2 159 Marketable equity securities 506 914 1,497 2,917 Other 25 8 — 33 Total ¥ 33,733 ¥ 1,017 ¥ 4,806 ¥ 39,556 September 30, 2020 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 11,030 ¥ 149 ¥ 2,769 ¥ 13,948 Foreign government and official institution bonds 12,057 52 716 12,825 Corporate bonds 732 16 193 941 Residential mortgage-backed securities 3,707 — — 3,707 Other debt securities 233 — — 233 Marketable equity securities 300 616 1,462 2,378 Other 22 9 6 37 Total ¥ 28,081 ¥ 842 ¥ 5,146 ¥ 34,069

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) [Text Block]	6 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss) [Text Block]	11. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table presents the changes in Accumulated OCI, net of tax and net of noncontrolling interests, for the six months ended September 30, 2019 and 2020: Six months ended 2019 2020 (in millions) Accumulated other comprehensive income(loss), net of taxes: Net unrealized gains (losses) on investment securities: Balance at beginning of period ¥ (369,369 ) ¥ (344,785 ) Net change during the period 82,908 54,116 Effect of adopting new guidance on measurement of credit losses on financial instruments — 34 Balance at end of period ¥ (286,461 ) ¥ (290,635 ) Net debt valuation adjustments: Balance at beginning of period ¥ (8,670 ) ¥ 45,502 Net change during the period 850 (59,324 ) Balance at end of period ¥ (7,820 ) ¥ (13,822 ) Net unrealized gains ( losses ) Balance at beginning of period ¥ (24,140 ) ¥ (13,343 ) Net change during the period 9,167 38,130 Balance at end of period ¥ (14,973 ) ¥ 24,787 Defined benefit plans: Balance at beginning of period ¥ (208,273 ) ¥ (337,918 ) Net change during the period (7,750 ) 27,625 Balance at end of period ¥ (216,023 ) ¥ (310,293 ) Foreign currency translation adjustments: Balance at beginning of period ¥ 326,183 ¥ 230,127 Net change during the period (205,047 ) (184,264 ) Balance at end of period ¥ 121,136 ¥ 45,863 Balance at end of period ¥ (404,141 ) ¥ (544,100 ) The following table presents the before tax and net of tax changes in each component of Accumulated OCI for the six months ended September 30, 2019 and 2020: Six months ended September 30, 2019 2020 Before tax Tax (expense) Net of tax Before tax Tax (expense) Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities ¥ 157,642 ¥ (34,202 ) ¥ 123,440 ¥ 83,444 ¥ (21,968 ) ¥ 61,476 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (45,354 ) 13,370 (31,984 ) (1,055 ) (238 ) (1,293 ) Net change 112,288 (20,832 ) 91,456 82,389 (22,206 ) 60,183 Net unrealized gains on investment securities attributable to noncontrolling interests 8,548 6,067 Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group 82,908 54,116 Net debt valuation adjustments: Net debt valuation adjustments 1,067 (327 ) 740 (85,613 ) 26,214 (59,399 ) Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 159 (49 ) 110 108 (33 ) 75 Net change 1,226 (376 ) 850 (85,505 ) 26,181 (59,324 ) Net debt valuation adjustments attributable to noncontrolling interests — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group 850 (59,324 ) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains on derivatives qualifying for cash flow hedges 6,748 (1,934 ) 4,814 51,002 (14,013 ) 36,989 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 5,843 (1,527 ) 4,316 1,388 (371 ) 1,017 Net change 12,591 (3,461 ) 9,130 52,390 (14,384 ) 38,006 Net unrealized losses on derivatives qualifying for cash flow hedges attributable to noncontrolling interests (37 ) (124 ) Net unrealized gains on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group 9,167 38,130 Defined benefit plans: Defined benefit plans (13,959 ) 3,917 (10,042 ) 26,092 (8,070 ) 18,022 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 2,169 (500 ) 1,669 13,617 (3,871 ) 9,746 Net change (11,790 ) 3,417 (8,373 ) 39,709 (11,941 ) 27,768 Defined benefit plans attributable to noncontrolling interests (623 ) 143 Defined benefit plans attributable to Mitsubishi UFJ Financial Group (7,750 ) 27,625 Foreign currency translation adjustments: Foreign currency translation adjustments (224,257 ) 24,752 (199,505 ) (214,725 ) 19,531 (195,194 ) Reclassification adjustment for losses ( gains ) (2,208 ) 1,095 (1,113 ) 797 (245 ) 552 Net change (226,465 ) 25,847 (200,618 ) (213,928 ) 19,286 (194,642 ) Foreign currency translation adjustments attributable to noncontrolling interests 4,429 (10,378 ) Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (205,047 ) (184,264 ) Other comprehensive loss attributable to Mitsubishi UFJ Financial Group ¥ (119,872 ) ¥ (123,717 ) The following table presents t Accumulated respective Six months ended 2019 2020 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated statements of income (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale ¥ (45,550 ) ¥ (1,005 ) Investment securities gains—net Other 196 (50 ) (45,354 ) (1,055 ) Total before tax 13,370 (238 ) Income tax expense ¥ (31,984 ) ¥ (1,293 ) Net of tax Net debt valuation adjustments ¥ 159 ¥ 108 Equity in earnings of equity method investees—net 159 108 Total before tax (49 ) (33 ) Income tax expense ¥ 110 ¥ 75 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ 4,408 ¥ 1,236 Interest income on Loans, including fees Foreign exchange contracts 1,433 152 Interest expense on Long-term debt or Foreign exchange losses—net Other 2 — 5,843 1,388 Total before tax (1,527 ) (371 ) Income tax expense ¥ 4,316 ¥ 1,017 Net of tax Defined benefit plans Net actuarial loss (1) ¥ 8,073 ¥ 16,830 Other non-interest Prior service cost (1) (2,882 ) (2,137 ) Other non-interest Gain on settlements and curtailment, and other (1) (3,022 ) (1,076 ) Other non-interest 2,169 13,617 Total before tax (500 ) (3,871 ) Income tax expense ¥ 1,669 ¥ 9,746 Net of tax Foreign currency translation adjustments ¥ (4,976 ) ¥ 715 Other non-interest 2,768 82 Other non-interest (2,208 ) 797 Total before tax 1,095 (245 ) Income tax expense ¥ (1,113 ) ¥ 552 Net of tax Total reclassifications for the period ¥ (39,391 ) ¥ 14,855 Total before tax 12,389 (4,758 ) Income tax expense ¥ (27,002 ) ¥ 10,097 Net of tax Note: (1 ) These Accumulated OCI components are components of net periodic benefit cost. See Note 8 for more information.

Derivative Financial Instrument

Derivative Financial Instruments [Text Block]	6 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments [Text Block]	12. 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. See Note 23 to the consolidated financial statements for the fiscal year ended March 31, 2020 for a further discussion of the MUFG Group’s use of derivative instruments. During the six months ended September 30, 2020, there was no change in the MUFG Group’s use of derivative instruments that had a material impact on the MUFG Group’s financial position and results of operations. Derivatives Designated as Hedges The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered mainly by MUFG Americas Holdings whose fiscal period ends on December 31. Cash Flow Hedges From time to time, MUFG Americas Holdings uses interest rate derivatives to hedge the risk of changes in cash flows attributable to changes in the designated interest rate on LIBOR indexed loans, and to a lesser extent, to hedge interest rate risk on rollover debt. MUFG Americas Holdings used interest rate derivatives with an aggregate notional amount of ¥1,023.5 billion at June 30, 2020 to hedge the risk of changes in cash flows attributable to changes in the designated interest rates from variable rate loans. MUFG Americas Holdings used interest rate derivatives with an aggregate notional amount of ¥1.0 billion at June 30, 2020 to hedge the risk of changes in cash flows attributable to changes in the designated interest rate on LIBOR indexed short-term borrowings. At June 30, 2020, the weighted average remaining life of the active cash flow hedges was 3.2 years. For cash flow hedges, changes in the fair value of the hedging instruments are reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged cash flows are recognized in net interest income. At June 30, 2020, MUFG Americas Holdings expects to reclassify approximately ¥10.1 billion of income from A ccumulated Notional Amounts of Derivative Contracts The following table summarizes the notional amounts of derivative contracts at March 31, 2020 and September 30, 2020: Notional amounts (1) March 31, September 30, (in trillions) Interest rate contracts ¥ 1,553.5 ¥ 1,455.9 Foreign exchange contracts 230.2 212.4 Equity contracts 8.1 7.2 Commodity contracts 0.1 0.1 Credit derivatives 8.7 10.3 Other 3.1 3.3 Total ¥ 1,803.7 ¥ 1,689.2 Note: (1) Includes both written and purchased positions. Fair value of derivative instruments March 31, 2020 (1)(5) September 30, 2020 (1)(5) Not designated (2) Designated (3) Total (4) Not designated (2) Designated (3) Total (4) (in billions) Derivative assets: Interest rate contracts ¥ 10,847 ¥ — ¥ 10,847 ¥ 10,477 ¥ — ¥ 10,477 Foreign exchange contracts 3,734 — 3,734 2,860 — 2,860 Equity contracts 236 — 236 210 — 210 Commodity contracts 26 — 26 31 — 31 Credit derivatives 114 — 114 91 — 91 Other (6) 1 — 1 4 — 4 Total derivative assets ¥ 14,958 ¥ — ¥ 14,958 ¥ 13,673 ¥ — ¥ 13,673 Derivative liabilities: Interest rate contracts ¥ 10,205 ¥ — ¥ 10,205 ¥ 9,640 ¥ — ¥ 9,640 Foreign exchange contracts 3,604 4 3,608 2,754 3 2,757 Equity contracts 277 — 277 223 — 223 Commodity contracts 26 — 26 30 — 30 Credit derivatives 95 — 95 91 — 91 Other (6) (177 ) — (177 ) (105 ) — (105 ) Total derivative liabilities ¥ 14,030 ¥ 4 ¥ 14,034 ¥ 12,633 ¥ 3 ¥ 12,636 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 and (3) The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by certain subsidiaries. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying condensed 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 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. (6) Other mainly include s Loan s Impact of Derivatives on the Conden sed The following table provide s Trading and risk management derivatives gains and losses Foreign exchange Trading account Total (in billions) Six months ended September 30, 2019: Interest rate contracts ¥ — ¥ 122 ¥ 122 Foreign exchange contracts (185 ) — (185 ) Equity contracts — (58 ) (58 ) Commodity contracts — (15 ) (15 ) Credit derivatives — (23 ) (23 ) Other — (48 ) (48 ) Total ¥ (185 ) ¥ (22 ) ¥ (207 ) Six months ended September 30, 2020: Interest rate contracts ¥ — ¥ 136 ¥ 136 Foreign exchange contracts 74 — 74 Equity contracts — (37 ) (37 ) Credit derivatives — 2 2 Other 9 (94 ) (85 ) Total ¥ 83 ¥ 7 ¥ 90 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. See Note 23 to the consolidated financial statements for the fiscal year ended March 31, 2020 for a more detailed explanation and discussion of credit derivatives. The table below summarizes certain information regarding protection sold through credit derivatives as of March 31, 2020 and September 30, 2020: Protection sold Maximum potential/Notional amount Fair value At March 31, 2020: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 303,870 ¥ 2,125,006 ¥ 494,040 ¥ 2,922,916 ¥ (63,855 ) Non-investment 93,671 279,892 49,681 423,244 3,358 Not rated 2,453 6,826 — 9,279 (18 ) Total 399,994 2,411,724 543,721 3,355,439 (60,515 ) Index and basket credit default swaps held by BK: Investment grade (2) — 28,296 — 28,296 (3 ) Non-investment — 99,035 — 99,035 (1,195 ) Total — 127,331 — 127,331 (1,198 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 20,000 182,306 14,950 217,256 (1,820 ) Non-investment — 7,595 — 7,595 (165 ) Not rated 28,296 190,398 5,316 224,010 (5,205 ) Total 48,296 380,299 20,266 448,861 (7,190 ) Total index and basket credit default swaps sold 48,296 507,630 20,266 576,192 (8,388 ) Total credit default swaps sold ¥ 448,290 ¥ 2,919,354 ¥ 563,987 ¥ 3,931,631 ¥ (68,903 ) Protection sold Maximum potential/Notional amount by Fair value At September 30, 2020: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 360,206 ¥ 2,216,372 ¥ 648,184 ¥ 3,224,762 ¥ (47,942 ) Non-investment 118,924 377,967 87,198 584,089 12,209 Not rated 848 2,437 — 3,285 (121 ) Total 479,978 2,596,776 735,382 3,812,136 (35,854 ) Index and basket credit default swaps held by BK: Investment grade (2) — 367,247 47,557 414,804 (33 ) Non-investment 11,638 84,640 — 96,278 (1,449 ) Total 11,638 451,887 47,557 511,082 (1,482 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 36,000 169,791 6,820 212,611 (3,265 ) Non-investment — 7,504 — 7,504 (141 ) Not rated 32,038 239,229 16,207 287,474 (3,945 ) Total 68,038 416,524 23,027 507,589 (7,351 ) Total index and basket credit default swaps sold 79,676 868,411 70,584 1,018,671 (8,833 ) Total credit default swaps sold ¥ 559,654 ¥ 3,465,187 ¥ 805,966 ¥ 4,830,807 ¥ (44,687 ) 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- 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 ¥65 billion and ¥3,544 billion, respectively, at March 31, 2020, and approximately ¥42 billion and ¥4,489 billion, respectively, at September 30, 2020. 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 the MUFG Group has posted collateral of approximately ¥152 billion and ¥210 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 ¥58 billion and ¥80 billion, respectively, as of March 31, 2020 and ¥59 billion and ¥41 billion, respectively, as of September 30, 2020.

Obligations under Guarantees an

Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block]	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block]	13. OBLIGATIONS UNDER GUARANTEES AND OTHER OFF-BALANCE Obligations under Guarantees The MUFG Group provides customers with a variety of guarantees and similar arrangements as described in Note 24 2020 2020 2020 March 31, 2020 September 30, 2020 (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,895 Performance guarantees 3,058 2,974 Derivative instruments (1)(2) 58,836 45,827 Liabilities of trust accounts 13,142 12,058 Other 88 38 Total ¥ 79,222 ¥ 64,792 Notes: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation. (2) 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. 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, 2020 2020 At March 31, 2020 Maximum Amount by borrower grade Normal Close (1) Likely to (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,984 ¥ 93 ¥ 17 ¥ 4 Performance guarantees 3,058 2,904 96 36 22 Total ¥ 7,156 ¥ 6,888 ¥ 189 ¥ 53 ¥ 26 At September 30, 2020 Maximum Amount by borrower grade Normal Close (1) Likely to (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 3,895 ¥ 3,785 ¥ 89 ¥ 17 ¥ 4 Performance guarantees 2,974 2,853 76 19 26 Total ¥ 6,869 ¥ 6,638 ¥ 165 ¥ 36 ¥ 30 Note: (1 ) See Notes of the tables regarding “the maximum potential amount of future payments classified based upon internal credit ratings “in Note 24 2020 The guarantees the MUFG Group does not classify based upon internal credit ratings are described in Note 24 2020 Other Off-balance In addition to obligations under guarantees and similar arrangements set forth above, the MUFG Group issues other off-balance March 31, September 30, (in billions) Commitments to extend credit ¥ 76,398 ¥ 84,339 Commercial letters of credit 757 680 Commitments to make investments 247 256 Other 5 6 Allowance for Credit Losses on Off-Balance The MUFG Group maintains an allowance for credit losses on off-balance

Contingent Liabilities _Text Bl

Contingent Liabilities [Text Block]	6 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities [Text Block]	14. CONTINGENT LIABILITIES Repayment of Excess Interest 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 ¥29,438 million and ¥28,241 million as of March 31, 2020 and September 30, 2020, respectively. Provision (reversal) related to the allowance for the six months ended September 30, 2019 and 2020 were not material. 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.

Variable Interest Entities _Tex

Variable Interest Entities [Text Block]	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Variable Interest Entities [Text Block]	15. 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. See Note 2 5 The following tables present the assets and liabilities of consolidated VIEs recorded on the accompanying condensed consolidated balance sheets at March 31, 2020 and September 30, 2020: Consolidated VIEs Consolidated assets At March 31, 2020: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,263,082 ¥ 102,781 ¥ 31,625 ¥ 12,989 ¥ 1,195,283 ¥ 4,913,939 ¥ 6,465 Investment funds 493,757 — 16,482 314,074 34,121 — 129,080 Special purpose entities created for structured financing 204,047 — 2,658 — — 119,348 82,041 Repackaged instruments 249,529 1,330 — 42,052 118,776 86,859 512 Securitization of the MUFG Group’s assets 10,956,261 — — — — 10,933,580 22,681 Trust arrangements 7,527,539 — 654 336,546 745,846 6,441,864 2,629 Other 31,295 350 2,055 — — 6,885 22,005 Total consolidated assets before elimination 25,725,510 104,461 53,474 705,661 2,094,026 22,502,475 265,413 The amounts eliminated in consolidation (6,877,849 ) (103,615 ) (23,427 ) (10,592 ) (289,567 ) (6,429,880 ) (20,768 ) Total consolidated assets ¥ 18,847,661 ¥ 846 ¥ 30,047 ¥ 695,069 ¥ 1,804,459 ¥ 16,072,595 ¥ 244,645 Consolidated liabilities Total Deposits Other Long-term All other (in millions) Asset-backed conduits ¥ 6,253,318 ¥ — ¥ 4,327,685 ¥ 1,478,921 ¥ 446,712 Investment funds 15,817 — — 5,546 10,271 Special purpose entities created for structured financing 114,357 — — 112,474 1,883 Repackaged instruments 251,056 — 65,965 163,833 21,258 Securitization of the MUFG Group’s assets 10,924,830 — 16,008 10,077,839 830,983 Trust arrangements 7,522,190 6,743,261 — — 778,929 Other 27,302 — 5,989 1,321 19,992 Total consolidated liabilities before elimination 25,108,870 6,743,261 4,415,647 11,839,934 2,110,028 The amounts eliminated in consolidation (15,045,398 ) (703 ) (2,526,893 ) (11,374,581 ) (1,143,221 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,465,320 ) (6,742,558 ) (1,857,923 ) (1 ) (864,838 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 598,152 ¥ — ¥ 30,831 ¥ 465,352 ¥ 101,969 Consolidated VIEs Consolidated assets At September 30, 2020: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 5,469,538 ¥ 41,437 ¥ 29,879 ¥ 11,056 ¥ 1,035,425 ¥ 4,313,554 ¥ 38,187 Investment funds 454,682 — 14,905 304,249 37,550 — 97,978 Special purpose entities created for structured financing 178,382 — 1,581 2,631 — 121,556 52,614 Repackaged instruments 246,388 1,628 — 42,725 115,302 86,474 259 Securitization of the MUFG Group’s assets 10,948,652 — — — — 10,928,152 20,500 Trust arrangements 7,871,857 — — 493,749 811,669 6,566,438 1 Other 26,902 327 3,591 — — 5,556 17,428 Total consolidated assets before elimination 25,196,401 43,392 49,956 854,410 1,999,946 22,021,730 226,967 The amounts eliminated in consolidation (7,182,793 ) (42,254 ) (20,600 ) (7,345 ) (426,809 ) (6,665,007 ) (20,778 ) Total consolidated assets ¥ 18,013,608 ¥ 1,138 ¥ 29,356 ¥ 847,065 ¥ 1,573,137 ¥ 15,356,723 ¥ 206,189 Consolidated liabilities Total Deposits Other Long-term All other (in millions) Asset-backed conduits ¥ 5,468,866 ¥ — ¥ 3,584,976 ¥ 1,456,023 ¥ 427,867 Investment funds 12,773 — — 5,438 7,335 Special purpose entities created for structured financing 96,885 — — 88,959 7,926 Repackaged instruments 247,379 — 20,836 162,788 63,755 Securitization of the MUFG Group’s assets 10,939,846 — 17,957 10,442,692 479,197 Trust arrangements 7,871,292 6,961,743 58,159 — 851,390 Other 22,969 — 4,294 1,259 17,416 Total consolidated liabilities before elimination 24,660,010 6,961,743 3,686,222 12,157,159 1,854,886 The amounts eliminated in consolidation (14,821,066 ) — (2,069,125 ) (11,776,218 ) (975,723 ) The amount of liabilities with recourse to the (9,368,713 ) (6,961,743 ) (1,586,600 ) — (820,370 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have ¥ 470,231 ¥ — ¥ 30,497 ¥ 380,941 ¥ 58,793 In general, the creditors or beneficial interest holders of consolidated VIEs have recourse not only to the assets of those VIEs of which they are creditors or beneficial interest holders, but also to other assets of the MUFG Group, since the MUFG Group is also contractually required to provide credit enhancement or program-wide liquidity to these VIEs. The following tables present the total assets of non-consolidated non-consolidated non-consolidated Non-consolidated On-balance On-balance sheet At March 31, 2020 Total assets Maximum Total Trading Investment Loans All other Total All other (in millions) Asset-backed conduits ¥ 27,700,099 ¥ 5,836,895 ¥ 4,797,551 ¥ 190 ¥ 1,737,979 ¥ 3,059,382 ¥ — ¥ — ¥ — Investment funds 55,644,434 1,918,403 1,712,037 437,858 525,022 724,253 24,904 356,679 356,679 Special purpose entities created for structured financing 37,026,192 3,601,834 2,764,156 392,588 35,774 2,317,128 18,666 6,058 6,058 Repackaged instruments 8,215,327 3,030,263 2,931,617 394,478 2,123,058 361,184 52,897 — — Other 54,962,702 2,940,349 2,314,142 191,646 — 1,995,985 126,511 41,693 41,693 Total ¥ 183,548,754 ¥ 17,327,744 ¥ 14,519,503 ¥ 1,416,760 ¥ 4,421,833 ¥ 8,457,932 ¥ 222,978 ¥ 404,430 ¥ 404,430 Non-consolidated VIEs On-balance On-balance sheet At September 30, 2020 Total assets Maximum Total Trading Investment Loans All other Total All other (in millions) Asset-backed conduits ¥ 23,625,636 ¥ 5,601,213 ¥ 4,323,980 ¥ 196 ¥ 1,640,676 ¥ 2,683,108 ¥ — ¥ — ¥ — Investment funds 56,790,968 2,395,171 1,968,163 562,081 531,817 832,961 41,304 — — Special purpose entities created for structured financing 38,824,813 3,850,285 2,854,711 434,870 1,005 2,415,283 3,553 8,687 8,687 Repackaged instruments 8,894,052 2,927,552 2,859,769 387,971 1,995,105 443,619 33,074 — — Other 53,978,941 2,662,086 1,997,173 172,260 — 1,733,234 91,679 23,753 23,753 Total ¥ 182,114,410 ¥ 17,436,307 ¥ 14,003,796 ¥ 1,557,378 ¥ 4,168,603 ¥ 8,108,205 ¥ 169,610 ¥ 32,440 ¥ 32,440 Maximum exposure to loss on each type of entity is determined based on the carrying amount of any on-balance off-balance on-balance

Fees and Commissions Income _Te

Fees and Commissions Income [Text Block]	6 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Fees and Commissions Income [Text Block]	16. FEES AND COMMISSIONS INCOME Disaggregation of Contract Revenue Details of fees and commissions income for the six months ended September 30, 2019 and 2020 are as follows: 2019 2020 (in millions) Fees and commissions on deposits ¥ 26,731 ¥ 26,221 Fees and commissions on remittances and transfers 83,541 82,125 Fees and commissions on foreign trading business 33,117 29,195 Fees and commissions on credit card business 118,916 96,131 Fees and commissions on security-related services 108,403 121,629 Fees and commissions on administration and management services for investment funds 71,981 106,186 Trust fees 58,948 61,003 Guarantee fees (1) 22,846 22,802 Insurance commissions 21,178 19,444 Fees and commissions on real estate business 21,094 13,917 Other fees and commissions (2) 131,708 121,119 Total ¥ 698,463 ¥ 699,772 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 17 17 condensed 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 Business 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 Business Group (“JCIB”), Global Corporate Investment Banking Business 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 busi n 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.

Business Segments _Text Block_

Business Segments [Text Block]	6 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Business Segments [Text Block]	17. 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 condensed 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. 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 group offers large Japanese corporations advanced financial solutions designed to respond to their diversified and globalized needs and to contribute to their business and financial strategies through the global network of the MUFG group companies. 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. The MUFG Group made modifications to its internal management accounting rules and practices to clarify the responsibility for profits of each business segment, effective April 1, 2020. Major rule changes are (i) allocation of adjustments related to the derivative counterparty risk previously included in Other to the Global Markets Business Group, which holds the derivative assets, and (ii) reorganization of functions between the Retail & Commercial Banking Business Group, the Japanese Corporate & Investment Banking Business Group, the Global Corporate & Investment Banking Business Group and Other due to refinement of the business segment definition. These modifications had the following impact on its previously reported business segment information for the six months ended September 30, 2019: • increasing the operating profits of the Global Markets Business Group, the Japanese Corporate & Investment Banking Business Group and the Global Corporate & Investment Banking Business Group by ¥12.1 billion, ¥7.2 billion and ¥6.9 billion, respectively; and • reducing the operating profits of Other, the Retail & Commercial Banking Business Group and the Global Commercial Banking Business Group by ¥24.4 billion, ¥4.4 billion and ¥1.4 billion, respectively. Customer Business Retail & Japanese Global Global Asset Total Global Other Total (in billions) Six months ended September 30, 2019: Net revenue: ¥ 723.9 ¥ 276.2 ¥ 199.6 ¥ 366.5 ¥ 101.3 ¥ 1,667.5 ¥ 336.1 ¥ 2.2 ¥ 2,005.8 BK and TB (1): 345.1 210.0 137.2 (0.8 ) 45.6 737.1 239.4 35.1 1,011.6 Net interest income 225.5 92.4 59.5 0.1 0.8 378.3 71.8 40.5 490.6 Net fees 105.2 92.4 78.0 — 44.8 320.4 (6.5 ) (22.6 ) 291.3 Other 14.4 25.2 (0.3 ) (0.9 ) — 38.4 174.1 17.2 229.7 Other than BK and TB 378.8 66.2 62.4 367.3 55.7 930.4 96.7 (32.9 ) 994.2 Operating expenses 590.4 160.2 126.8 270.8 65.3 1,213.5 113.3 60.7 1,387.5 Operating profit (loss) ¥ 133.5 ¥ 116.0 ¥ 72.8 ¥ 95.7 ¥ 36.0 ¥ 454.0 ¥ 222.8 ¥ (58.5 ) ¥ 618.3 Six months ended September 30, 2020: Net revenue: ¥ 662.7 ¥ 249.8 ¥ 197.5 ¥ 415.3 ¥ 138.1 ¥ 1,663.4 ¥ 461.7 ¥ 4.1 ¥ 2,129.2 BK and TB (1) 304.9 198.3 117.6 0.4 46.8 668.0 343.6 38.0 1,049.6 Net interest income 203.6 79.4 57.9 0.5 2.2 343.6 103.4 44.2 491.2 Net fees 90.6 95.9 67.5 — 44.6 298.6 1.4 (27.3 ) 272.7 Other 10.7 23.0 (7.8 ) (0.1 ) — 25.8 238.8 21.1 285.7 Other than BK and TB 357.8 51.5 79.9 414.9 91.3 995.4 118.1 (33.9 ) 1,079.6 Operating expenses 553.6 152.5 131.8 264.3 101.5 1,203.7 112.5 77.6 1,393.8 Operating profit (loss) ¥ 109.1 ¥ 97.3 ¥ 65.7 ¥ 151.0 ¥ 36.6 ¥ 459.7 ¥ 349.2 ¥ (73.5 ) ¥ 735.4 Note: (1) “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 condensed 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 condensed consolidated statements of income. A reconciliation of operating profit under the internal management reporting system for the six months ended September 30, 2019 and 2020 above to income before i Six months ended 2019 2020 (in billions) Operating profit ¥ 618 ¥ 735 Provision (102 ) (210 ) Foreign exchange gains (losses)—net (32 ) 87 Trading account profits —net 505 83 Equity investment securities gains (losses)—net (26 ) 694 Debt investment securities losses—net (136 ) (204 ) Equity in earnings of equity method investees—net 165 140 Impairment of goodwill (241 ) (106 ) Reversal of off-balance 63 37 Other—net 24 (110 ) Income before income tax expense ¥ 838 ¥ 1,146

Fair Value _Text Block_

Fair Value [Text Block]	6 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value [Text Block]	18. FAIR VALUE For a discussion and explanation of the MUFG Group’s valuation methodologies for assets and liabilities measured at fair value and the fair value hierarchy, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. During the six months ended September 30, 2020, there were no changes to the MUFG Group’s valuation methodologies that had a material impact on the MUFG Group’s financial position and results of operations. 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, 2020 and September 30, 2020: At March 31, 2020 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 14,891,635 ¥ 17,061,985 ¥ 525,946 ¥ 32,479,566 Debt securities Japanese national government and Japanese government agency bonds 3,805,039 350,128 — 4,155,167 Japanese prefectural and municipal bonds — 93,479 — 93,479 Foreign government and official institution bonds 9,356,427 417,766 1,052 9,775,245 Corporate bonds 11 2,537,559 144 2,537,714 Residential mortgage-backed securities — 9,037,539 — 9,037,539 Asset-backed securities — 590,556 416,259 1,006,815 Other debt securities — 7,787 6,651 14,438 Commercial paper — 2,959,580 — 2,959,580 Equity securities (2) 1,730,158 1,067,591 101,840 2,899,589 Trading derivative assets 216,834 14,680,632 60,108 14,957,574 Interest rate contracts 74,488 10,758,790 13,329 10,846,607 Foreign exchange contracts 1,550 3,723,087 9,046 3,733,683 Equity contracts 140,796 87,285 7,491 235,572 Commodity contracts — 10 27,492 27,502 Credit derivatives — 111,460 2,750 114,210 Investment securities: Available-for-sale 22,126,881 11,798,392 274,930 34,200,203 Japanese national government and Japanese government agency bonds 19,897,187 3,565,692 — 23,462,879 Japanese prefectural and municipal bonds — 2,952,820 — 2,952,820 Foreign government and official institution bonds 2,229,694 792,027 15,767 3,037,488 Corporate bonds — 1,262,718 10,108 1,272,826 Residential mortgage-backed securities — 1,459,378 15 1,459,393 Commercial mortgage-backed securities — 380,278 1,977 382,255 Asset-backed securities — 1,328,601 140,875 1,469,476 Other debt securities — 56,878 106,188 163,066 Equity securities 4,471,499 296,819 39,963 4,808,281 Marketable equity securities 4,471,499 296,819 — 4,768,318 Nonmarketable equity securities (3) — — 39,963 39,963 Other (4) 1,054,186 45,913 36,701 1,136,800 Total ¥ 42,761,035 ¥ 43,883,741 ¥ 937,648 ¥ 87,582,424 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 555,664 ¥ 3,718 ¥ — ¥ 559,382 Trading derivative liabilities 300,215 13,851,205 56,631 14,208,051 Interest rate contracts 153,098 10,038,198 14,079 10,205,375 Foreign exchange contracts 3,360 3,596,589 4,041 3,603,990 Equity contracts 143,757 121,229 11,713 276,699 Commodity contracts — 14 26,775 26,789 Credit derivatives — 95,175 23 95,198 Obligation to return securities received as collateral (5) 4,663,068 143,103 — 4,806,171 Other (6) — 514,003 6,606 520,609 Total ¥ 5,518,947 ¥ 14,512,029 ¥ 63,237 ¥ 20,094,213 At September 30, 2020 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 19,178,865 ¥ 12,313,174 ¥ 779,709 ¥ 32,271,748 Debt securities Japanese national government and Japanese government agency bonds 5,997,301 363,252 — 6,360,553 Japanese prefectural and municipal bonds — 95,846 — 95,846 Foreign government and official institution bonds 11,797,972 694,545 1,122 12,493,639 Corporate bonds — 2,479,587 — 2,479,587 Residential mortgage-backed securities 120 5,018,942 — 5,019,062 Asset-backed securities — 817,786 413,305 1,231,091 Other debt securities — 7,579 269,984 277,563 Commercial paper — 1,626,513 — 1,626,513 Equity securities (2) 1,383,472 1,209,124 95,298 2,687,894 Trading derivative assets 96,022 13,507,030 67,440 13,670,492 Interest rate contracts 20,459 10,440,306 16,159 10,476,924 Foreign exchange contracts 588 2,849,093 10,612 2,860,293 Equity contracts 74,975 129,075 6,242 210,292 Commodity contracts — 5 30,550 30,555 Credit derivatives — 88,539 2,526 91,065 Other (7) — 12 1,351 1,363 Investment securities: Available-for-sale 32,362,705 12,401,919 247,927 45,012,551 Japanese national government and Japanese government agency bonds 30,410,927 3,398,541 — 33,809,468 Japanese prefectural and municipal bonds — 3,343,506 — 3,343,506 Foreign government and official institution bonds 1,951,778 859,040 16,759 2,827,577 Corporate bonds — 1,221,142 145 1,221,287 Residential mortgage-backed securities — 1,385,579 15 1,385,594 Commercial mortgage-backed securities — 441,505 1,796 443,301 Asset-backed securities — 1,138,145 126,597 1,264,742 Other debt securities — 174,403 102,615 277,018 Commercial Paper — 440,058 — 440,058 Equity securities 4,976,057 344,445 45,764 5,366,266 Marketable equity securities 4,976,057 344,445 — 5,320,502 Nonmarketable equity securities (3) — — 45,764 45,764 Other (4) 780,868 32,590 22,649 836,107 Total ¥ 57,394,517 ¥ 38,599,158 ¥ 1,163,489 ¥ 97,157,164 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 106,076 ¥ 2,722 ¥ — ¥ 108,798 Trading derivative liabilities 139,392 12,551,354 47,204 12,737,950 Interest rate contracts 35,749 9,596,157 7,754 9,639,660 Foreign exchange contracts 944 2,748,606 4,170 2,753,720 Equity contracts 102,699 115,816 4,317 222,832 Commodity contracts — 5 30,621 30,626 Credit derivatives — 90,756 61 90,817 Other (7) — 14 281 295 Obligation to return securities received as collateral (5) 5,038,763 107,149 — 5,145,912 Other (6) — 418,084 49,251 467,335 Total ¥ 5,284,231 ¥ 13,079,309 ¥ 96,455 ¥ 18,459,995 Notes: (1) Includes securities measured under the fair value option. (2) Excludes ( 3 Excludes certain investments valued at net asset value of real estate funds and private equity and other funds whose fair values at March 31, 2020 were ¥23,233 million and ¥18,862 million respectively, and those at September 30, 2020 were ¥23,838 million and ¥17,951 million respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2020 were ¥1,494 million and nil, respectively, and those at September 30, 2020 were ¥1,307 million and nil (4) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions and money in trust for segregating cash deposited by customers on security transactions. (5) Included in Other liabilities. (6) Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments. (7) From the period ended September 30, 2020, certain derivatives such as earthquake derivatives previously included in Commodity contracts are separately disclosed in Other of Trading derivative assets and liabilities. Changes in Level 3 Recurring Fair Value Measurements The following tabl e Total gains (losses) Change in March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, (in millions) Assets Trading account assets: Trading securities (1) ¥ 785,326 ¥ (20,158 ) (2) ¥ — ¥ 134,609 ¥ — ¥ (120,505 ) ¥ (105,890 ) ¥ 24,882 ¥ (15,402 ) ¥ 682,862 ¥ (19,011 ) (2) Debt securities Foreign government and official institution bonds 792 347 — 50,548 — (48,068 ) (18 ) — — 3,601 (11 ) Corporate bonds 31,384 (76 ) — — — (1,049 ) (3,621 ) 24,882 (5) (15,402 ) (5) 36,118 6 Residential mortgage-backed securities 35,181 (1,425 ) — — — (11,134 ) (10,649 ) — — 11,973 (1,109 ) Asset-backed securities 627,678 (20,780 ) — 79,717 — (60,249 ) (89,939 ) — — 536,427 (18,740 ) Other debt securities 35,148 (952 ) — — — — — — — 34,196 (952 ) Equity securities 55,143 2,728 — 4,344 — (5 ) (1,663 ) — — 60,547 1,795 Trading derivatives—net 36,170 4,283 (2) (107 ) 99 (773 ) — (21,616 ) 37,553 (321 ) 55,288 1,797 (2) Interest rate contracts—net (4,189 ) 14,185 (113 ) — — — (5,471 ) 2,976 (340 ) 7,048 6,246 Foreign exchange contracts—net 18,191 (10,614 ) (87 ) 3 — — 4,037 34,577 (5) (144 ) 45,963 (5,580 ) Equity contracts—net 2,862 743 87 96 (419 ) — (5,350 ) — 163 (1,818 ) 703 Commodity contracts—net 949 (27 ) 2 — (354 ) — — — — 570 645 Credit derivatives—net 18,357 (4 ) 4 — — — (14,832 ) — — 3,525 (217 ) Investment securities: Available-for-sale 283,434 1,331 (3) (5,379 ) 134,575 — — (162,520 ) 5,450 (3,020 ) 253,871 (619 ) (3) Foreign government and official institution bonds 19,246 — 209 382 — — (5,835 ) — — 14,002 — Corporate bonds 4,196 (383 ) 114 20 — — (641 ) 5,450 (5) (3,020 ) (5) 5,736 (619 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,038 — 58 — — — (33 ) — — 2,063 — Asset-backed securities 131,455 1,714 (3,914 ) 134,169 — — (132,544 ) — — 130,880 — Other debt securities 126,484 — (1,846 ) 4 — — (23,467 ) — — 101,175 — Equity securities 27,820 2,660 (3) — 5,636 — (1,515 ) (1 ) — (202 ) 34,398 1,736 (3) Nonmarketable equity securities 27,820 2,660 — 5,636 — (1,515 ) (1 ) — (202 ) 34,398 1,736 Other 32,378 (8,350 ) (7) (1,732 ) 35,894 — (48 ) (1 ) — — 58,141 (8,346 ) (7) Total ¥ 1,165,128 ¥ (20,234 ) ¥ (7,218 ) ¥ 310,813 ¥ (773 ) ¥ (122,068 ) ¥ (290,028 ) ¥ 67,885 ¥ (18,945 ) ¥ 1,084,560 ¥ (24,443 ) Liabilities Other ¥ 65,648 ¥ (18,504 ) (4) ¥ 1,807 ¥ — ¥ 2,338 ¥ — ¥ (9,708 ) ¥ 1,171 (6) ¥ (37,043 ) (6) ¥ 39,103 ¥ (16,212 ) (4) Total ¥ 65,648 ¥ (18,504 ) ¥ 1,807 ¥ — ¥ 2,338 ¥ — ¥ (9,708 ) ¥ 1,171 ¥ (37,043 ) ¥ 39,103 ¥ (16,212 ) Total gains (losses) Change in March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, (in millions) Assets Trading account assets: Trading securities (1) ¥ 525,946 ¥ (627 ) (2) ¥ — ¥ 158,481 ¥ — ¥ (65,231 ) ¥ (2,091 ) ¥ 190,391 ¥ (27,160 ) ¥ 779,709 ¥ (1,434 ) (2) Debt securities Foreign government and official institution bonds 1,052 188 — 12,625 — (12,713 ) (14 ) — (16 ) 1,122 78 Corporate bonds 144 35 — — — (179 ) — — — — — Asset-backed securities 416,259 (1,685 ) — 46,455 — (46,700 ) (1,024 ) — — 413,305 (1,728 ) Other debt securities 6,651 3,446 — 69,498 — — — 190,389 (8) — 269,984 3,446 Equity securities 101,840 (2,611 ) — 29,903 — (5,639 ) (1,053 ) 2 (27,144 ) (8) 95,298 (3,230 ) Trading derivatives—net 3,477 33,219 (2) (757 ) 595 (334 ) — (15,112 ) (392 ) (460 ) 20,236 7,640 (2) Interest rate contracts—net (750 ) 13,271 (341 ) — — — (3,364 ) (15 ) (396 ) 8,405 5,130 Foreign exchange contracts—net 5,005 1,909 (276 ) — — — 159 (377 ) 22 6,442 1,226 Equity contracts—net (4,222 ) 18,054 (145 ) — — — (11,748 ) — (14 ) 1,925 1,288 Commodity contracts—net (65 ) (11 ) 5 — — — — — — (71 ) — Credit derivatives—net 2,727 (103 ) — — — — (159 ) — — 2,465 (103 ) Other—net (9) 782 99 — 595 (334 ) — — — (72 ) 1,070 99 Investment securities: Available-for-sale 274,930 (1,478 ) (3) (4,400 ) 130,042 — (11 ) (141,214 ) 20 (9,962 ) 247,927 (206 ) (3) Foreign government and official institution bonds 15,767 — (682 ) 3,230 — — (1,556 ) — — 16,759 — Corporate bonds 10,108 (3 ) — — — — (18 ) 20 (9,962 ) (5) 145 (4 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 1,977 — (149 ) — — (11 ) (21 ) — — 1,796 — Asset-backed securities 140,875 (1,475 ) (2,416 ) 126,800 — — (137,187 ) — — 126,597 (202 ) Other debt securities 106,188 — (1,153 ) 12 — — (2,432 ) — — 102,615 — Equity securities 39,963 (423 ) (3) — 6,413 — (464 ) — 285 (10 ) 45,764 (665 ) (3) Nonmarketable equity securities 39,963 (423 ) — 6,413 — (464 ) — 285 (10 ) 45,764 (665 ) Other 36,701 (14,583 ) (7) (500 ) 1,121 — — (90 ) — — 22,649 (14,577 ) (7) Total ¥ 881,017 ¥ 16,108 ¥ (5,657 ) ¥ 296,652 ¥ (334 ) ¥ (65,706 ) ¥ (158,507 ) ¥ 190,304 ¥ (37,592 ) ¥ 1,116,285 ¥ (9,242 ) Liabilities Other ¥ 6,606 ¥ (18,465 ) (4) ¥ 3,711 ¥ — ¥ 30,192 ¥ — ¥ (9,309 ) ¥ 11,330 (6) ¥ (4,322 ) (6) ¥ 49,251 ¥ (14,090 ) (4) Total ¥ 6,606 ¥ (18,465 ) ¥ 3,711 ¥ — ¥ 30,192 ¥ — ¥ (9,309 ) ¥ 11,330 ¥ (4,322 ) ¥ 49,251 ¥ (14,090 ) Notes: (1 ) Includes Trading securities measured under the fair value option. (2 ) Included in Trading account profits—net and Foreign exchange gains (losses)—net. (3 ) Included in Investment securities gains—net and Other comprehensive income—net. (4 ) Included in Trading account profits—net. (5 ) Transfers into Level 3 for Foreign exchange contracts—net were mainly caused by the valuation using certain unobservable input. For the six months ended September 30, 2019, transfers into (out of) Level 3 for corporate bonds were mainly caused by the decrease (increase) in liquidity or the availability of the quoted prices provided by third-party venders. For the six months ended September 30, 2020, transfers out of Level 3 for corporate bonds were due to changes in the impact of unobservable credit worthiness inputs to the entire fair value measurement of the private placement bonds issued by Japanese non-public companies. Unobservable credit worthiness inputs include probability of default based on credit ratings of the bond issuers and loss given default. (6 ) Transfers into (out of) Level 3 for embedded derivatives in Other 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 Fees and commissions income and Other non-interest (8 ) Transfers relate to the reclassification of certain securities (9 ) From the period ended September 30, 2020, certain derivatives such as earthquake derivatives previously included in Commodity contracts—net are separately disclosed in Other—net of Trading derivatives—net. 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, 2020 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 ¥ 15,767 Return on equity method Probability of default 0.2%~1.3% 0.4% Recovery rate 55.0%~90.0% 69.9% Market-required return on capital 8.0%~10.0% 9.9% Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed 92,025 Discounted cash flow Probability of default 1.2%~5.3% 5.0% Recovery rate 60.0%~76.0% 68.2% 389,170 Internal model (4) Asset correlations 1.0% 1.0% Discount factor 1.1%~1.4% 1.4% Prepayment rate 21.0% 21.0% Probability of default 0.0%~99.0% — (3) Recovery rate 57.8% 57.8% Other debt securities 6,651 Discounted cash flow Liquidity premium 2.4% 2.4% 86,734 Return on equity method Probability of default 0.0%~25.0% 0.3% Recovery rate 60.0%~90.0% 79.8% Market-required return on capital 8.0%~10.0% 9.4% Equity Securities 27,144 Discounted cash flow Liquidity premium 1.0% 1.0% At March 31, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate (728 ) Option model Correlation between interest rates 32.9%~62.5% Correlation between interest rate and foreign exchange rate 16.7%~60.0% Volatility 0.0%~100.0% Foreign exchange contracts—net 5,005 Option model Correlation between interest rates 30.0%~70.0% Correlation between interest rate and foreign exchange rate 15.8%~60.0% Correlation between foreign exchange rates 60.0% Volatility 7.5%~17.0% Equity contracts—net (10,038 ) Option model Correlation between foreign exchange rate and equity (58.4)%~56.9% Correlation between equities 19.5%~81.0% Volatility 24.2%~32.0% 6,166 Discounted cash flow Term of litigation 0.1year~1.1year s At September 30, 2020 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 ¥ 16,759 Return on equity method Probability of default 0.2%~1.8% 0.6% Recovery rate 35.0%~90.0% 66.6% Market-required return on capital 8.0%~10.0% 9.9% Residential mortgage- backed securities, Commercial mortgage- backed securities and Asset-backed securities 86,222 Discounted cash flow Probability of default 4.6%~5.3% 5.1% Recovery rate 65.0%~76.0% 68.8% 381,036 Internal model (4) Asset correlations 1.0% 1.0% Discount factor 1.5%~1.6% 1.6% Prepayment rate 22.2% 22.2% Probability of default 0.0%~91.1% — (3) Recovery rate 51.1% 51.1% Other debt securities 269,984 Discounted cash flow Liquidity premium 1.0%~3.1% 2.9% 83,647 Return on equity method Probability of default 0.0%~25.0% 0.4% Recovery rate 55.0%~90.0% 78.1% Market-required return on capital 8.0%~10.0% 9.6% At September 30, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 6,917 Option model Correlation between interest rates 30.0%~63.2% 45.7% Correlation between interest rate and foreign exchange rate 15.6%~60.0% 40.3% Volatility 0.0%~100.0% 50.0% Foreign exchange contracts—net 6,442 Option model Correlation between interest rates 30.0%~70.0% 47.4% Correlation between interest rate and foreign exchange rate 17.4%~60.0% 38.5% Correlation between foreign exchange rates 55.0% 55.0% Volatility 9.5%~22.3% 14.4% Equity contracts—net (3,054 ) Option model Correlation between foreign exchange rate and equity (58.4)%~56.4% 32.6% Correlation between equities 19.1%~96.0% 53.7% Volatility 29.0%~40.0% 31.5% 5,091 Discounted cash flow Term of litigation 0.1year~1.2years 0.6year Notes: (1) The fair value as of March 31, 2020 and September 30, 2020 excludes the fair value of investments valued using vendor prices. (2) Weighted average is for investment securities. Median is used for derivative instruments (3) See “Probability of default” in “Sensitivity to and range of unobservable inputs” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. (4) For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. Changes in For a discussion of the impact o 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. See Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020 for further information on assets and liabilities measured at fair value on a nonrecurring basis. 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, 2020 and September 30, 2020: March 31, 2020 September 30, 2020 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ 15,473 ¥ 2,703 ¥ 18,176 ¥ — ¥ 11,091 ¥ 1,901 ¥ 12,992 Loans 2,548 9,199 260,282 272,029 2,648 9,800 263,428 275,876 Loans held for sale — — 73,573 73,573 — — 44,210 44,210 Collateral dependent loans 2,548 9,199 186,709 198,456 2,648 9,800 219,218 231,666 Premises and equipment — — 37,109 37,109 — — 7,877 7,877 Intangible assets — — 453 453 — — 1,357 1,357 Goodwill — — 283,032 283,032 — — 97,072 97,072 Other assets 73,015 — 18,609 91,624 111,626 33,840 9,075 154,541 Investments in equity method investees (1) 73,015 — 5,911 78,926 111,626 33,840 — 145,466 Other — — 12,698 12,698 — — 9,075 9,075 Total ¥ 75,563 ¥ 24,672 ¥ 602,188 ¥ 702,423 ¥ 114,274 ¥ 54,731 ¥ 380,710 ¥ 549,715 Notes: (1 ) Excludes certain investments valued at net asset value of ¥12,935 million and ¥10,031 million at March 31, 2020 and September 30, 2020, respectively. The unfunded commitments related to these investments are ¥17,216 million and ¥13,219 million at March 31, 2020 and September 30, 2020, respectively. These investments are in private equity funds. For the nature and details of private equity funds, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. (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. The following table presents losses (gains) recorded as a result of changes in the fair value of assets measured at fair value on a nonrecurring basis for the six months ended September 30, 2019 and 2020: Losses(gains) for the 2019 2020 (in millions) Investment securities ¥ 2,193 ¥ (701 ) Loans 30,664 89,082 Loans held for sale 8,468 5,620 Collateral dependent loans 22,196 83,462 Premises and equipment 5,975 8,569 Intangible assets 2,334 4,286 Goodwill 241,356 106,479 Other assets 15,437 87,584 Investments in equity method investees 4,944 53,138 Other 10,493 34,446 Total ¥ 297,959 ¥ 295,299 Fair Value Option For a discussion of the primary financial instruments for which the fair value option was previously elected, including the basis for those, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. The following table presents the gains or losses recorded for the six months ended September 30, 2019 and 2020 related to the eligible instruments for which the MUFG Group elected the fair value option: Six months ended September 30, 2019 2020 Trading Foreign Total Trading Foreign Total (in millions) Financial assets: Trading account securities ¥ 437,931 ¥ (654,622 ) ¥ (216,691 ) ¥ 148,265 ¥ (237,425 ) ¥ (89,160 ) Total ¥ 437,931 ¥ (654,622 ) ¥ (216,691 ) ¥ 148,265 ¥ (237,425 ) ¥ (89,160 ) Financial liabilities: Other short-term borrowings (1) ¥ (778 ) ¥ — ¥ (778 ) ¥ (15,805 ) ¥ — ¥ (15,805 ) Long-term debt (1) (20,559 ) — (20,559 ) (16,945 ) — (16,945 ) Total ¥ (21,337 ) ¥ — ¥ (21,337 ) ¥ (32,750 ) ¥ — ¥ (32,750 ) Note: (1) Change in value attributable to the instrument-specific credit risk related to those financial liabilities are not material. The following table presents the differences between the aggregate fair value and the aggregate remaining contractual principal balance outstanding as of March 31, 2020 and September 30, 2020 f o March 31, 2020 September 30, 2020 Remaining Fair value Fair value Remaining Fair value Fair value (in millions) Financial liabilities: Long-term debt ¥ 319,149 ¥ 304,067 ¥ (15,082 ) ¥ 416,035 ¥ 393,710 ¥ (22,325 ) Total ¥ 319,149 ¥ 304,067 ¥ (15,082 ) ¥ 416,035 ¥ 393,710 ¥ (22,325 ) Interest income and expense related to the assets and liabilities for which the fair value option is elected are measured based on the contractual rates and dividend income related to these assets are recognized when the shareholder right to receive the dividend is established. These interest income and expense and dividend income are reported in the accompanying condensed consolidated statements of income as either interest income or expense, depending on the nature of the related asset or liability. Estimated Fair Value of Financial Instruments The following is a summary of carrying amounts and estimated fair values by level within the fair value hierarchy of financial instruments which are not carried at fair value on a recurring basis in the accompanying condensed consolidated balance sheets as of March 31, 2020 and September 30, 2020: At March 31, 2020 Carrying Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 33,283 ¥ 33,283 ¥ 33,283 ¥ — ¥ — Interest-earning deposits in other banks 45,267 45,267 — 45,267 — Call loans and funds sold 1,169 1,169 — 1,169 — Receivables under resale agreements 23,996 23,996 — 23,996 — Receivables under securities borrowing transactions 3,444 3,444 — 3,444 — Investment securities 4,166 4,178 1,134 1,042 2,002 Loans, net of allowance for credit losses (1) 117,373 118,497 3 259 118,235 Other financial assets (2) 8,494 8,494 — 8,494 — Financial liabilities: Deposits Non-interest-bearing ¥ 33,382 ¥ 33,382 ¥ — ¥ 33,382 ¥ — Interest-bearing 170,574 170,631 — 170,631 — Total deposits 203,956 204,013 — 204,013 — Call money and funds purchased 3,669 3,669 — 3,669 — Payables under repurchase agreements 31,850 31,850 — 31,850 — Payables under securities lending transactions 1,017 1,017 — 1,017 — Due to trust account and other short-term borrowings 19,057 19,057 — 19,057 — Long-term debt 27,772 27,941 — 27,941 — Other financial liabilities 7,139 7,139 — 7,139 — At September 30, 2020 Carrying Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 46,982 ¥ 46,982 ¥ 46,982 ¥ — ¥ — Interest-earning deposits in other banks 46,936 46,936 — 46,936 — Call loans and funds sold 1,049 1,049 — 1,049 — Receivables under resale agreements 14,051 14,051 — 14,051 — Receivables under securities borrowing transactions 3,199 3,199 — 3,199 — Investment securities 3,930 3,972 1,127 907 1,938 Loans, net of allowance for credit losses (1) 115,532 116,984 3 265 116,716 Other financial assets (2) 7,194 7,194 — 7,194 — Financial liabilities: Deposits Non-interest-bearing ¥ 35,643 ¥ 35,643 ¥ — ¥ 35,643 ¥ — Interest-bearing 182,750 182,789 — 182,789 — Total deposits 218,393 218,432 — 218,432 — Call money and funds purchased 3,797 3,797 — 3,797 — Payables under repurchase agreements 26,448 26,448 — 26,448 — Payables under securities lending transactions 842 842 — 842 — Due to trust account and other short-term borrowings 14,916 14,916 — 14,916 — Long-term debt 35,391 35,824 — 35,824 — Other financial liabilities 6,880 6,880 — 6,880 — Notes: (1) 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. (2) Excludes investments in equity method investees of ¥2,421 billion and ¥2,327 billion at March 31, 20 20 20 The fair values of certain off-balance

Investments in Equity Method In

Investments in Equity Method Investees [Text Block]	6 Months Ended
	Sep. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
Investments in Equity Method Investees [Text Block]	19. INVESTMENTS IN EQUITY METHOD INVESTEES Summarized Financial Information of the MUFG Group’s Equity Method Investee Summarized operating results of Morgan Stanley, the largest portion of the MUFG Group’s equity method investees, for the six months ended September 30, 2019 and 2020 are as follows: 2019 2020 (in billions) Net revenues ¥ 2,203 ¥ 2,681 Total non-interest 1,593 1,842 Income from continuing operations before income taxes 610 839 Net income applicable to Morgan Stanley 475 632

Subsequent Events _Text Block_

Subsequent Events [Text Block]	6 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events [Text Block]	20. SUBSEQUENT EVENTS Approval of Dividends On November 13 Discontinuation of acquisition of DVB Bank SE’s aviation finance-related businesses In November 2020, MUFG Bank decided to discontinue the acquisition of DVB’s aviation investment management and asset management businesses, that was initially planned to be transferred to a newly established subsidiary of BOT Lease, since it was difficult to fully obtain the approval of the relevant national authorities. The impact of the discontinuation on the consolidated financial statements was not material. See Note 2 for further information.

Basis of Semiannual Condensed_2

Basis of Semiannual Condensed Consolidated Financial Statements [Text Block] (Policies)	6 Months Ended
	Sep. 30, 2020
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 17
Basis of Financial Statements [Policy Text Block]	Basis of Financial Statements The accompanying semiannual condensed consolidated financial statements are presented in Japanese yen, the currency of the country in which MUFG is incorporated and principally operates. The accompanying condensed consolidated financial statements include the accounts of MUFG, its subsidiaries and certain variable interest entities (“VIE”s) (together, the “MUFG Group”), and reflect all adjustments (consisting of normal recurring adjustments) that, in the opinion of management, are necessary to conform with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The accompanying condensed consolidated financial statements should be read in conjunction with the consolidated financial statements for the fiscal year ended March 31, 2020
Use of Estimates [Policy Text Block]	Use of Estimates The preparation of condensed 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Accounting Changes [Policy Text Block]	Accounting Changes Disclosure Framework Changes to the Disclosure Requirements for Fair Value Measurement adoption is permitted upon issuance of this guidance. An entity is permitted to early adopt any removed or modified disclosures upon issuance of this guidance and delay adoption of the additional disclosures until their effective date. The MUFG Group early adopted removal disclosure requirements as of March 31, 2019 , and then Measurement of Credit Losses on Financial Instruments available-for-sale In April 2019 and November 2019, the FASB issued additional guidance to improve certain aspects of this guidance. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The MUFG Group adopted the guidance on April 1, 2020. Upon adoption, the MUFG Group resulted in an increase in the beginning balance of the allowance for credit losses and the allowance for off-balance 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
Recently Issued Accounting Pronouncements [Policy Text Block]	Recently Issued Accounting Pronouncements Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans

Investment Securities _Text B_2

Investment Securities [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities [Table Text Block]	At March 31, 2020: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,308,538 ¥ 185,302 ¥ 30,961 ¥ 23,462,879 Japanese prefectural and municipal bonds 2,938,743 16,279 2,202 2,952,820 Foreign government and official institution bonds 2,936,110 107,406 6,028 3,037,488 Corporate bonds 1,261,586 12,445 1,205 1,272,826 Residential mortgage-backed securities 1,460,641 3,083 4,331 1,459,393 Commercial mortgage-backed securities 379,234 6,110 3,089 382,255 Asset-backed securities 1,461,083 9,516 1,123 1,469,476 Other debt securities (1) 161,832 3,190 1,956 163,066 Total ¥ 33,907,767 ¥ 343,331 ¥ 50,895 ¥ 34,200,203 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,574 ¥ 29,856 ¥ — ¥ 1,130,430 Foreign government and official institution bonds 151,555 243 689 151,109 Residential mortgage-backed securities 737,242 10,478 3,012 (2) 744,708 Commercial mortgage-backed securities 146,039 2,993 317 (2) 148,715 Asset-backed securities 2,030,371 277 27,716 2,002,932 Total ¥ 4,165,781 ¥ 43,847 ¥ 31,734 ¥ 4,177,894 Notes: (1) Other debt securities in the table above mainly include ¥86,734 million of private placement debt conduit bonds. (2) MUFG Americas Holdings Corporation (“MUFG Americas Holdings” or “MUAH”) reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity At September 30, 2020: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 33,645,301 ¥ 180,810 ¥ 16,643 ¥ 33,809,468 Japanese prefectural and municipal bonds 3,328,438 16,585 1,517 3,343,506 Foreign government and official institution bonds 2,706,767 123,091 2,281 2,827,577 Corporate bonds 1,209,772 12,236 721 1,221,287 Residential mortgage-backed securities 1,375,478 11,216 1,100 1,385,594 Commercial mortgage-backed securities 417,732 26,960 1,391 443,301 Asset-backed securities 1,262,027 7,218 4,503 1,264,742 Other debt securities 275,245 3,099 1,326 277,018 Commercial paper 440,010 48 — 440,058 Total ¥ 44,660,770 ¥ 381,263 ¥ 29,482 ¥ 45,012,551 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,508 ¥ 26,632 ¥ — ¥ 1,127,140 Foreign government and official institution bonds 133,970 2,043 — 136,013 Residential mortgage-backed securities 605,042 25,670 — (1) 630,712 Commercial mortgage-backed securities 134,202 6,108 15 (1) 140,295 Asset-backed securities 1,956,524 154 18,783 1,937,895 Total ¥ 3,930,246 ¥ 60,607 ¥ 18,798 ¥ 3,972,055 Note: (1) 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 debt securities Available-for-sale Amortized Fair value Fair value (in millions) Due in one year or less ¥ 18,595 ¥ 18,649 ¥ 20,830,504 Due from one year to five years 1,191,186 1,221,061 11,185,978 Due from five years to ten years 610,998 614,175 6,838,352 Due after ten years 2,109,467 2,118,170 6,157,717 Total ¥ 3,930,246 ¥ 3,972,055 ¥ 45,012,551
Investments by Length and Category in Continuous Loss Position [Table Text Block]	Less than 12 months 12 months or more Total At March 31, 2020: 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 ¥ 11,781,600 ¥ 30,961 ¥ — ¥ — ¥ 11,781,600 ¥ 30,961 202 Japanese prefectural and municipal bonds 935,540 2,202 — — 935,540 2,202 340 Foreign government and official institution bonds 564,620 5,481 114,407 547 679,027 6,028 153 Corporate bonds 522,941 1,191 25,228 14 548,169 1,205 154 Residential mortgage-backed securities 114,057 530 388,064 3,801 502,121 4,331 402 Commercial mortgage-backed securities 182,887 3,087 1,304 2 184,191 3,089 39 Asset-backed securities 189,775 503 86,605 620 276,380 1,123 94 Other debt securities 53,070 132 30,657 1,824 83,727 1,956 24 Total ¥ 14,344,490 ¥ 44,087 ¥ 646,265 ¥ 6,808 ¥ 14,990,755 ¥ 50,895 1,408 Held-to-maturity Foreign government and official institution bonds ¥ 55,746 ¥ 689 ¥ — ¥ — ¥ 55,746 ¥ 689 9 Residential mortgage-backed securities 108,478 1,033 360,841 1,979 469,319 3,012 281 Commercial mortgage-backed securities 10,281 32 133,791 285 144,072 317 31 Asset-backed securities 637,201 8,536 1,259,720 19,180 1,896,921 27,716 77 Total ¥ 811,706 ¥ 10,290 ¥ 1,754,352 ¥ 21,444 ¥ 2,566,058 ¥ 31,734 398 Less than 12 months 12 months or more Total At September 30, 2020: 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 ¥ 12,651,521 ¥ 16,634 ¥ 733 ¥ 9 ¥ 12,652,254 ¥ 16,643 186 Japanese prefectural and municipal bonds 715,401 1,517 — — 715,401 1,517 262 Foreign government and official institution bonds 261,083 2,278 36,846 3 297,929 2,281 42 Corporate bonds 402,062 718 4,417 3 406,479 721 136 Residential mortgage-backed securities 168,166 400 117,942 700 286,108 1,100 201 Commercial mortgage-backed securities 30,431 1,391 — — 30,431 1,391 36 Asset-backed securities 204,689 2,735 51,321 1,768 256,010 4,503 110 Other debt securities 170,762 300 19,903 1,026 190,665 1,326 60 Total ¥ 14,604,115 ¥ 25,973 ¥ 231,162 ¥ 3,509 ¥ 14,835,277 ¥ 29,482 1,033
Carrying Value of Nonmarketable Equity Securities [Table Text Block]	March 31, September 30, (in millions) Measurement alternative balance ¥ 534,882 ¥ 323,990
Related Adjustments for Nonmarketable Equity Securities [Table Text Block]	Six months ended 2019 2020 (in millions) Measurement alternative impairment losses (1)(4) ¥ (1,402 ) ¥ (2,984 ) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ (953 ) ¥ — Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ 162 ¥ 3,685 Notes: (1) Included in Investment securities gains—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 downward or upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities. (4) The cumulative impairment losses at March 31, 2020 and September 30, 2020 were ¥5,007 million and ¥7,925 million, respectively. (5) The cumulative downward changes for observable prices at March 31, 2020 and September 30, 2020 were ¥953 million and ¥953 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2020 and September 30, 2020 were ¥34,466 million and ¥36,782 million, respectively.
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]	Six months ended 2019 2020 (in millions) Net gains (losses) recognized during the period (1) ¥ (36,019 ) ¥ 683,303 Less: Net gains (losses) recognized during the period on equity securities sold during the period (9,960 ) 17,136 Net unrealized gains (losses) recognized during the reporting period still held at the reporting date ¥ (26,059 ) ¥ 666,167 Note: (1) Included in Investment securities gains—net.

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Loans by Domicile and Industry of Borrower Segment Classification [Table Text Block]	March 31, September 30, (in millions) Domestic: Manufacturing ¥ 11,448,778 ¥ 13,580,404 Construction 733,212 729,357 Real estate 12,054,671 12,254,948 Services 2,585,111 2,915,608 Wholesale and retail 7,504,561 7,778,422 Banks and other financial institutions (1) 5,161,093 5,043,357 Communication and information services 1,572,344 1,486,217 Other industries 8,673,871 9,420,430 Consumer 15,319,721 14,962,766 Total domestic 65,053,362 68,171,509 Foreign: Governments and official institutions 726,347 692,943 Banks and other financial institutions (1) 11,788,225 10,700,402 Commercial and industrial 32,565,030 29,877,321 Other 8,404,062 7,625,703 Total foreign 53,483,664 48,896,369 Unearned income, unamortized premiums—net and deferred loan fees—net (350,287 ) (319,759 ) Total (2) ¥ 118,186,739 ¥ 116,748,119 Notes: (1) Loans to so-called “non-bank Non-bank (2) The above table includes loans held for sale of ¥344,790 million at March 31, 2020 and ¥315,142 million at September 30, 2020, respectively.
Nonaccrual Loans by Class [Table Text Block]	March 31, 2020: Nonaccrual (1) (in millions) Commercial Domestic ¥ 312,972 Foreign 127,001 Residential 63,998 Card 61,172 MUAH 35,840 Krungsri 149,732 Other 27,754 Total ¥ 778,469 Recorded Loan Balance September 30, 2020: Nonaccrual (1) Nonaccrual Loans (2) Recognized (in millions) Commercial Domestic ¥ 357,412 ¥ 112,770 ¥ 2,229 Foreign 184,317 53,354 2,061 Residential 71,976 4,188 488 Card 62,012 641 20 MUAH 63,782 16,007 483 Krungsri 172,239 3,338 3,498 Other 43,464 — 3,153 Total ¥ 955,202 ¥ 190,298 ¥ 11,932 Notes: (1) Nonaccrual loans in the above table do not include loans held for sale of ¥330 million and ¥6,767 million at March 31, 2020 and September 30, 2020, respectively, and do not include loans acquired with deteriorated credit quality of ¥25,427 million at March 31, 2020. (2) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the
TDRs by Class [Table Text Block]	Six months ended September 30, 2019: Troubled Debt Troubled Debt Pre- Post- Recorded (in millions) Commercial (1)(3) Domestic ¥ 20,607 ¥ 20,607 ¥ 6,342 Foreign 29,360 29,360 — Residential (1)(3) 3,215 3,215 27 Card (2)(3) 11,900 11,362 1,825 MUAH (2)(3) 18,766 18,656 4,572 Krungsri (2)(3) 16,724 16,695 3,815 Other (2) 5,117 5,117 — Total ¥ 105,689 ¥ 105,012 ¥ 16,581 Six months ended September 30, 2020: Troubled Debt Troubled Debt Pre- Post- Recorded (in millions) Commercial (1)(3) Domestic ¥ 43,717 ¥ 43,717 ¥ 9,280 Foreign 10,292 10,292 3,940 Residential (1)(3) 27,985 27,985 41 Card (2)(3) 10,694 10,185 1,556 MUAH (2)(3) 13,958 13,920 3,113 Krungsri (2)(3) 9,130 9,130 1,875 Other (2)(3) 7,121 7,109 180 Total ¥ 122,897 ¥ 122,338 ¥ 19,985 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, Krungsri and Other segments include accrual and nonaccrual loans. (3) For the six months ended September 30, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial and Residential segments, reduction in the stated rate was the primary concession type in the Card segment, and some combination thereof were the primary concession type in the MUFG Americas Holdings and Krungsri segments. For the six months ended September 30, 2020, 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 and Other segments and forbearance was the primary concession type in the MUFG Americas Holdings segment.
Credit Quality Indicators of Loans by Class [Table Text Block]	At March 31, 2020: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,695,889 ¥ 1,186,044 ¥ 220,245 ¥ 51,102,178 Foreign 34,719,041 636,523 128,073 35,483,637 Loans acquired with deteriorated credit quality 8,255 9,739 18,978 36,972 Total ¥ 84,423,185 ¥ 1,832,306 ¥ 367,296 ¥ 86,622,787 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,256,744 ¥ 61,746 ¥ 13,318,490 Card ¥ 504,357 ¥ 61,286 ¥ 565,643 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,590,805 ¥ 15,119 ¥ 4,877,863 ¥ 87,648 ¥ 84,033 ¥ 9,655,468 Performing Under- Non-Performing Total (1) (in millions) Krungsri ¥ 6,241,696 ¥ 508,847 ¥ 161,047 ¥ 6,911,590 Accrual Nonaccrual Total (1) (in millions) Other ¥ 1,086,517 ¥ 31,376 ¥ 1,117,893
Credit Quality Indicators of Loans and Year of Origination by Class [Table Text Block]	Term Loans Revolving Revolving Total (1) At September 30, 2020: 2020 2019 2018 2017 2016 Prior (in millions) Commercial: ¥ 21,726,648 ¥ 13,635,192 ¥ 10,586,577 ¥ 6,294,885 ¥ 5,423,100 ¥ 8,805,508 ¥ 19,434,719 ¥ 14,706 ¥ 85,921,335 Domestic 17,012,671 8,041,145 6,880,626 4,386,030 4,136,969 6,499,262 7,591,943 — 54,548,646 Normal 16,731,403 7,793,705 6,708,236 4,212,921 4,037,026 6,019,442 7,294,686 — 52,797,419 Close Watch 266,470 231,540 155,590 158,486 75,883 347,677 273,753 — 1,509,399 Likely to become Bankrupt or Legally/Virtually Bankrupt 14,798 15,900 16,800 14,623 24,060 132,143 23,504 — 241,828 Foreign 4,713,977 5,594,047 3,705,951 1,908,855 1,286,131 2,306,246 11,842,776 14,706 31,372,689 Normal 4,592,892 5,467,471 3,572,056 1,811,264 1,223,744 2,138,758 11,664,163 14,706 30,485,054 Close Watch 115,006 74,537 106,742 91,792 60,835 90,305 165,238 — 704,455 Likely to become Bankrupt or Legally/Virtually Bankrupt 6,079 52,039 27,153 5,799 1,552 77,183 13,375 — 183,180 Residential ¥ 257,477 ¥ 748,682 ¥ 779,669 ¥ 875,938 ¥ 1,312,073 ¥ 9,083,685 ¥ 35,158 ¥ 8 ¥ 13,092,690 Accrual 257,309 748,210 779,153 875,057 1,310,291 9,019,418 32,916 — 13,022,354 Nonaccrual 168 472 516 881 1,782 64,267 2,242 8 70,336 Card ¥ 615 ¥ 1,350 ¥ 2,226 ¥ 651 ¥ 177 ¥ 7,807 ¥ 447,708 ¥ 59,329 ¥ 519,863 Accrual 559 1,183 1,890 330 69 6,623 432,578 14,619 457,851 Nonaccrual 56 167 336 321 108 1,184 15,130 44,710 62,012 MUAH (2) ¥ 812,392 ¥ 1,640,547 ¥ 1,141,188 ¥ 1,157,236 ¥ 989,283 ¥ 1,634,056 ¥ 1,947,184 ¥ — ¥ 9,321,886 Credit Quality Based on the Number of Delinquencies Accrual 224,531 815,376 480,089 771,203 692,337 854,594 155,253 — 3,993,383 Nonaccrual — 323 539 862 862 19,285 431 — 22,302 Credit Quality Based on Internal Credit Ratings Pass 578,811 774,425 577,062 367,717 281,755 663,880 1,652,947 — 4,896,597 Special Mention 3,663 44,066 69,492 11,313 13,683 45,790 73,155 — 261,162 Classified 5,387 6,357 14,006 6,141 646 50,507 65,398 — 148,442 Krungsri ¥ 773,460 ¥ 1,369,075 ¥ 1,112,319 ¥ 617,690 ¥ 334,566 ¥ 509,080 ¥ 2,101,674 ¥ 11,964 ¥ 6,829,828 Performing 751,398 1,261,184 972,167 528,286 283,029 407,251 1,932,692 — 6,136,007 Under-performing 19,249 81,332 108,811 71,709 37,575 61,834 141,072 — 521,582 Non-performing 2,813 26,559 31,341 17,695 13,962 39,995 27,910 11,964 172,239 Other ¥ 204,235 ¥ 267,571 ¥ 142,773 ¥ 57,223 ¥ 17,434 ¥ 12,055 ¥ 365,843 ¥ — ¥ 1,067,134 Accrual 203,021 256,046 132,678 53,381 16,357 11,201 350,986 — 1,023,670 Nonaccrual 1,214 11,525 10,095 3,842 1,077 854 14,857 — 43,464 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 Federal Deposit Insurance Corporation (“FDIC”) covered loans which are not individually rated totaling ¥365 million and nil at March 31, 2020 and September 30, 2020, 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, 2020: 1-3 months Greater Total Current Total (1) 90 Days and (in millions) Commercial Domestic ¥ 9,215 ¥ 26,971 ¥ 36,186 ¥ 51,065,992 ¥ 51,102,178 ¥ 4,720 Foreign 9,927 23,548 33,475 35,450,162 35,483,637 164 Residential 48,404 15,443 63,847 13,248,278 13,312,125 6,288 Card 14,735 29,997 44,732 518,008 562,740 — MUAH 31,052 14,435 45,487 9,603,339 9,648,826 2,101 Krungsri 160,253 129,186 289,439 6,616,104 6,905,543 — Other 16,442 24,348 40,790 1,069,186 1,109,976 — Total ¥ 290,028 ¥ 263,928 ¥ 553,956 ¥ 117,571,069 ¥ 118,125,025 ¥ 13,273 At September 30, 2020: 1-3 months Greater Total Current Total (1) 90 Days and (in millions) Commercial Domestic ¥ 15,794 ¥ 23,739 ¥ 39,533 ¥ 54,509,113 ¥ 54,548,646 ¥ 5,211 Foreign 16,084 35,918 52,002 31,320,687 31,372,689 331 Residential 45,852 33,119 78,971 13,013,719 13,092,690 13,015 Card 12,262 29,905 42,167 477,696 519,863 — MUAH 65,796 20,346 86,142 9,235,744 9,321,886 7,867 Krungsri 198,923 130,468 329,391 6,500,437 6,829,828 — Other 26,290 38,887 65,177 1,001,957 1,067,134 — Total ¥ 381,001 ¥ 312,382 ¥ 693,383 ¥ 116,059,353 ¥ 116,752,736 ¥ 26,424 Note: (1) At March 31, 2020, 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. At September 30, 2020, 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.
Changes in Allowance for Credit Losses by Portfolio Segment [Table Text Block]	Six months ended September 30, 2019: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ — ¥ 658,184 Provision for credit losses 28,388 130 14,456 17,950 24,902 16,295 102,121 Charge-offs 29,033 2,093 12,715 16,266 36,240 6,223 102,570 Recoveries collected 15,612 355 721 2,791 11,115 2,420 33,014 Net charge-offs 13,421 1,738 11,994 13,475 25,125 3,803 69,556 Other (1) (3,410 ) — — (1,613 ) 3,568 1,379 (76 ) Balance at end of period ¥ 401,172 ¥ 37,018 ¥ 35,012 ¥ 55,443 ¥ 148,157 ¥ 13,871 ¥ 690,673 Six months ended September 30, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Effect of adopting new guidance on measurement of credit losses on financial instruments (2) 83,828 49,494 14,262 25,037 118,333 32,750 323,704 Provision for (reversal of) credit losses 37,154 (947 ) 8,822 89,812 47,529 27,436 209,806 Charge-offs 34,833 997 11,230 17,453 44,882 25,795 135,190 Recoveries collected 3,362 7 486 1,749 11,405 2,528 19,537 Net charge-offs 31,471 990 10,744 15,704 33,477 23,267 115,653 Other (1) (3,968 ) — — (1,757 ) (10,860 ) (2,277 ) (18,862 ) Balance at end of period ¥ 567,818 ¥ 82,303 ¥ 47,520 ¥ 156,383 ¥ 291,151 ¥ 63,360 ¥ 1,208,535 Notes: (1 ) Other is principally comprised of gains or losses from foreign exchange translation. (2 ) See Note 1 for more information.
Allowance for Credit Losses and Recorded Investment in Loans by Portfolio Segment [Table Text Block]	At March 31, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 364,079 ¥ 12,651 ¥ 19,799 ¥ 5,977 ¥ 30,198 ¥ 5,073 ¥ 437,777 Collectively evaluated for impairment 108,100 21,130 15,369 53,013 139,401 22,566 359,579 Loans acquired with deteriorated credit quality (2) 10,096 965 12 5 27 1,079 12,184 Total ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Loans: Individually evaluated for impairment ¥ 944,988 ¥ 92,448 ¥ 65,292 ¥ 67,719 ¥ 98,959 ¥ 17,512 ¥ 1,286,918 Collectively evaluated for impairment 85,640,827 13,219,677 497,448 9,581,107 6,806,584 1,092,464 116,838,107 Loans acquired with deteriorated credit quality (2) 36,972 6,365 2,903 7,007 6,047 7,917 67,211 Total (1) ¥ 86,622,787 ¥ 13,318,490 ¥ 565,643 ¥ 9,655,833 ¥ 6,911,590 ¥ 1,117,893 ¥ 118,192,236 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.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Movement in Carrying Amount of Goodwill [Table Text Block]	Six months ended 2019 2020 (in millions) Balance at beginning of period Goodwill (1) ¥ 626,009 ¥ 1,093,554 Accumulated impairment losses (1) (192,118 ) (575,928 ) 433,891 517,626 Goodwill acquired during the six months (2) 446,643 3,990 Impairment loss (241,356 ) (106,479 ) Foreign currency translation adjustments and other (22,558 ) (10,128 ) Balance at end of period Goodwill 1,050,094 1,087,416 Accumulated impairment losses (433,474 ) (682,407 ) ¥ 616,620 ¥ 405,009 Notes: (1 ) Goodwill originally recognized of 2019, is not included in the table above. (2 ) See Note 2 for the goodwill acquired in connection with acquisitions.
Carrying Amount of Other Intangible Assets by Major Class [Table Text Block]	March 31, September 30, (in millions) Intangible assets subject to amortization: Software (1) ¥ 755,638 ¥ 764,940 Customer relationships 303,250 276,802 Core deposit intangibles 74,780 67,642 Trade names 56,693 53,311 Other 11,605 10,915 Total 1,201,966 1,173,610 Intangible assets not subject to amortization: Other (2) 37,560 25,630 Total ¥ 1,239,526 ¥ 1,199,240 Notes: (1 ) As a result of adopting new guidance, costs for implementation activities in certain hosting arrangements are capitalized as software. (2 ) Intangible assets not subject to amortization includes mortgage servicing rights accounted for at fair value of ¥29,641 million and ¥15,274 million at March 31, 2020 and September 30, 2020, respectively.

Lease Transactions _Text Bloc_2

Lease Transactions [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Profit or Loss of Lease Transactions as a Lessor [Table Text Block]	September 30, September 30, (in millions) Financing leases: Finance income on net investment ¥ 59,058 ¥ 64,748 Operating leases: Lease income ¥ 1,917 ¥ 2,025 Total ¥ 60,975 ¥ 66,773

Pledged Assets and Collateral_2

Pledged Assets and Collateral [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Assets Mortgaged Pledged or Otherwise Subject to Lien [Table Text Block]	September 30, (in millions) Trading account securities ¥ 9,578,255 Investment securities 18,831,013 Loans 13,827,599 Other 16,775 Total ¥ 42,253,642
Pledged Assets Classified by Type of Liabilities [Table Text Block]	September 30, (in millions) Deposits ¥ 215,110 Payables under repurchase agreements and securities lending transactions 14,638,080 Other short-term borrowings and long-term debt 27,374,865 Other 25,587 Total ¥ 42,253,642

Severance Indemnities and Pen_2

Severance Indemnities and Pension Plans [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Components of Net Periodic Benefit Cost of Pension Benefits, SIPs and Other Benefits [Table Text Block]	Six months ended September 30, Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Pension Pension Pension Other Pension Other (in millions) Service cost—benefits earned during the period ¥ 24,585 ¥ 23,695 ¥ 6,550 ¥ 175 ¥ 7,354 ¥ 117 Interest cost on projected benefit obligation 5,545 5,596 8,667 575 7,255 402 Expected return on plan assets (37,585 ) (35,577 ) (15,847 ) (949 ) (15,785 ) (1,072 ) Amortization of net actuarial loss 2,602 8,547 4,915 556 8,158 125 Amortization of prior service cost (602 ) (602 ) (1,332 ) (948 ) (1,309 ) (226 ) Loss (gain) on settlements and curtailment (2,347 ) (1,084 ) 185 — — — Net periodic benefit cost (income) ¥ (7,802 ) ¥ 575 ¥ 3,138 ¥ (591 ) ¥ 5,673 ¥ (654 )

Offsetting of Derivatives, Re_2

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Summary of Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Table Text Block]	Gross amounts of Gross amounts Net amounts Gross amounts not offset At March 31, 2020 consolidated balance sheet Financial Cash collateral Net amounts (in billions) Financial assets: Derivative assets ¥ 14,958 ¥ — ¥ 14,958 ¥ (11,282 ) ¥ (874 ) ¥ 2,802 Receivables under resale agreements 25,884 (1,888 ) 23,996 (23,195 ) (21 ) 780 Receivables under securities borrowing transactions 3,444 — 3,444 (3,336 ) — 108 Total ¥ 44,286 ¥ (1,888 ) ¥ 42,398 ¥ (37,813 ) ¥ (895 ) ¥ 3,690 Financial liabilities: Derivative liabilities ¥ 14,034 ¥ — ¥ 14,034 ¥ (11,296 ) ¥ (1,140 ) ¥ 1,598 Payables under repurchase agreements 33,733 (1,883 ) 31,850 (31,569 ) (34 ) 247 Payables under securities lending transactions 1,017 — 1,017 (986 ) — 31 Obligations to return securities received as collateral 4,806 — 4,806 (1,966 ) — 2,840 Total ¥ 53,590 ¥ (1,883 ) ¥ 51,707 ¥ (45,817 ) ¥ (1,174 ) ¥ 4,716 Gross amounts of Gross amounts Net amounts Gross amounts not offset At September 30, 2020 consolidated Financial Cash collateral Net amounts (in billions) Financial assets: Derivative assets ¥ 13,673 ¥ — ¥ 13,673 ¥ (10,188 ) ¥ (741 ) ¥ 2,744 Receivables under resale agreements 15,706 (1,655 ) 14,051 (13,308 ) (34 ) 709 Receivables under securities borrowing transactions 3,199 — 3,199 (3,101 ) — 98 Total ¥ 32,578 ¥ (1,655 ) ¥ 30,923 ¥ (26,597 ) ¥ (775 ) ¥ 3,551 Financial liabilities: Derivative liabilities ¥ 12,636 ¥ — ¥ 12,636 ¥ (10,204 ) ¥ (1,129 ) ¥ 1,303 Payables under repurchase agreements 28,081 (1,633 ) 26,448 (25,935 ) (42 ) 471 Payables under securities lending 842 — 842 (809 ) (2 ) 31 Obligations to return securities received as 5,146 — 5,146 (1,339 ) — 3,807 Total ¥ 46,705 ¥ (1,633 ) ¥ 45,072 ¥ (38,287 ) ¥ (1,173 ) ¥ 5,612

Repurchase Agreements and Sec_2

Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Gross Obligations by Remaining Contractual Maturity and Class of Collateral Pledged [Table Text Block]	March 31, 2020 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 9,685 ¥ 16,608 ¥ 4,496 ¥ 2,944 ¥ 33,733 Payables under securities lending transactions 934 64 19 — 1,017 Obligations to return securities received as collateral 3,856 599 276 75 4,806 Total ¥ 14,475 ¥ 17,271 ¥ 4,791 ¥ 3,019 ¥ 39,556 September 30, 2020 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 11,591 ¥ 12,592 ¥ 1,563 ¥ 2,335 ¥ 28,081 Payables under securities lending transactions 819 — 23 — 842 Obligations to return securities received as collateral 4,505 239 258 144 5,146 Total ¥ 16,915 ¥ 12,831 ¥ 1,844 ¥ 2,479 ¥ 34,069
Secured Borrowing by the Class of Collateral Pledged [Table Text Block]	Secured borrowing by the class of collateral pledged at March 31, 2020 and September 30, 2020 was as follows: March 31, 2020 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 10,687 ¥ 38 ¥ 2,241 ¥ 12,966 Foreign government and official institution bonds 17,326 57 873 18,256 Corporate bonds 784 — 183 967 Residential mortgage-backed securities 4,248 — 10 4,258 Other debt securities 157 — 2 159 Marketable equity securities 506 914 1,497 2,917 Other 25 8 — 33 Total ¥ 33,733 ¥ 1,017 ¥ 4,806 ¥ 39,556 September 30, 2020 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 11,030 ¥ 149 ¥ 2,769 ¥ 13,948 Foreign government and official institution bonds 12,057 52 716 12,825 Corporate bonds 732 16 193 941 Residential mortgage-backed securities 3,707 — — 3,707 Other debt securities 233 — — 233 Marketable equity securities 300 616 1,462 2,378 Other 22 9 6 37 Total ¥ 28,081 ¥ 842 ¥ 5,146 ¥ 34,069

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Changes in Accumulated OCI, Net of Tax and Net of Noncontrolling Interests [Table Text Block]	Six months ended 2019 2020 (in millions) Accumulated other comprehensive income(loss), net of taxes: Net unrealized gains (losses) on investment securities: Balance at beginning of period ¥ (369,369 ) ¥ (344,785 ) Net change during the period 82,908 54,116 Effect of adopting new guidance on measurement of credit losses on financial instruments — 34 Balance at end of period ¥ (286,461 ) ¥ (290,635 ) Net debt valuation adjustments: Balance at beginning of period ¥ (8,670 ) ¥ 45,502 Net change during the period 850 (59,324 ) Balance at end of period ¥ (7,820 ) ¥ (13,822 ) Net unrealized gains ( losses ) Balance at beginning of period ¥ (24,140 ) ¥ (13,343 ) Net change during the period 9,167 38,130 Balance at end of period ¥ (14,973 ) ¥ 24,787 Defined benefit plans: Balance at beginning of period ¥ (208,273 ) ¥ (337,918 ) Net change during the period (7,750 ) 27,625 Balance at end of period ¥ (216,023 ) ¥ (310,293 ) Foreign currency translation adjustments: Balance at beginning of period ¥ 326,183 ¥ 230,127 Net change during the period (205,047 ) (184,264 ) Balance at end of period ¥ 121,136 ¥ 45,863 Balance at end of period ¥ (404,141 ) ¥ (544,100 )
Before Tax and Net of Tax Changes in Each Component of Accumulated OCI [Table Text Block]	Six months ended September 30, 2019 2020 Before tax Tax (expense) Net of tax Before tax Tax (expense) Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities ¥ 157,642 ¥ (34,202 ) ¥ 123,440 ¥ 83,444 ¥ (21,968 ) ¥ 61,476 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (45,354 ) 13,370 (31,984 ) (1,055 ) (238 ) (1,293 ) Net change 112,288 (20,832 ) 91,456 82,389 (22,206 ) 60,183 Net unrealized gains on investment securities attributable to noncontrolling interests 8,548 6,067 Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group 82,908 54,116 Net debt valuation adjustments: Net debt valuation adjustments 1,067 (327 ) 740 (85,613 ) 26,214 (59,399 ) Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 159 (49 ) 110 108 (33 ) 75 Net change 1,226 (376 ) 850 (85,505 ) 26,181 (59,324 ) Net debt valuation adjustments attributable to noncontrolling interests — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group 850 (59,324 ) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains on derivatives qualifying for cash flow hedges 6,748 (1,934 ) 4,814 51,002 (14,013 ) 36,989 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 5,843 (1,527 ) 4,316 1,388 (371 ) 1,017 Net change 12,591 (3,461 ) 9,130 52,390 (14,384 ) 38,006 Net unrealized losses on derivatives qualifying for cash flow hedges attributable to noncontrolling interests (37 ) (124 ) Net unrealized gains on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group 9,167 38,130 Defined benefit plans: Defined benefit plans (13,959 ) 3,917 (10,042 ) 26,092 (8,070 ) 18,022 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 2,169 (500 ) 1,669 13,617 (3,871 ) 9,746 Net change (11,790 ) 3,417 (8,373 ) 39,709 (11,941 ) 27,768 Defined benefit plans attributable to noncontrolling interests (623 ) 143 Defined benefit plans attributable to Mitsubishi UFJ Financial Group (7,750 ) 27,625 Foreign currency translation adjustments: Foreign currency translation adjustments (224,257 ) 24,752 (199,505 ) (214,725 ) 19,531 (195,194 ) Reclassification adjustment for losses ( gains ) (2,208 ) 1,095 (1,113 ) 797 (245 ) 552 Net change (226,465 ) 25,847 (200,618 ) (213,928 ) 19,286 (194,642 ) Foreign currency translation adjustments attributable to noncontrolling interests 4,429 (10,378 ) Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (205,047 ) (184,264 ) Other comprehensive loss attributable to Mitsubishi UFJ Financial Group ¥ (119,872 ) ¥ (123,717 )
Reclassification of Significant Items out of Accumulated OCI [Table Text Block]	Six months ended 2019 2020 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated statements of income (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale ¥ (45,550 ) ¥ (1,005 ) Investment securities gains—net Other 196 (50 ) (45,354 ) (1,055 ) Total before tax 13,370 (238 ) Income tax expense ¥ (31,984 ) ¥ (1,293 ) Net of tax Net debt valuation adjustments ¥ 159 ¥ 108 Equity in earnings of equity method investees—net 159 108 Total before tax (49 ) (33 ) Income tax expense ¥ 110 ¥ 75 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ 4,408 ¥ 1,236 Interest income on Loans, including fees Foreign exchange contracts 1,433 152 Interest expense on Long-term debt or Foreign exchange losses—net Other 2 — 5,843 1,388 Total before tax (1,527 ) (371 ) Income tax expense ¥ 4,316 ¥ 1,017 Net of tax Defined benefit plans Net actuarial loss (1) ¥ 8,073 ¥ 16,830 Other non-interest Prior service cost (1) (2,882 ) (2,137 ) Other non-interest Gain on settlements and curtailment, and other (1) (3,022 ) (1,076 ) Other non-interest 2,169 13,617 Total before tax (500 ) (3,871 ) Income tax expense ¥ 1,669 ¥ 9,746 Net of tax Foreign currency translation adjustments ¥ (4,976 ) ¥ 715 Other non-interest 2,768 82 Other non-interest (2,208 ) 797 Total before tax 1,095 (245 ) Income tax expense ¥ (1,113 ) ¥ 552 Net of tax Total reclassifications for the period ¥ (39,391 ) ¥ 14,855 Total before tax 12,389 (4,758 ) Income tax expense ¥ (27,002 ) ¥ 10,097 Net of tax Note: (1 ) These Accumulated OCI components are components of net periodic benefit cost. See Note 8 for more information.

Derivative Financial Instrume_2

Derivative Financial Instruments [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts of Derivative Contracts [Table Text Block]	Notional amounts (1) March 31, September 30, (in trillions) Interest rate contracts ¥ 1,553.5 ¥ 1,455.9 Foreign exchange contracts 230.2 212.4 Equity contracts 8.1 7.2 Commodity contracts 0.1 0.1 Credit derivatives 8.7 10.3 Other 3.1 3.3 Total ¥ 1,803.7 ¥ 1,689.2 Note: (1) Includes both written and purchased positions.
Fair Value Information on Derivative Instruments Recorded on Condensed Consolidated Balance Sheets [Table Text Block]	Fair value of derivative instruments March 31, 2020 (1)(5) September 30, 2020 (1)(5) Not designated (2) Designated (3) Total (4) Not designated (2) Designated (3) Total (4) (in billions) Derivative assets: Interest rate contracts ¥ 10,847 ¥ — ¥ 10,847 ¥ 10,477 ¥ — ¥ 10,477 Foreign exchange contracts 3,734 — 3,734 2,860 — 2,860 Equity contracts 236 — 236 210 — 210 Commodity contracts 26 — 26 31 — 31 Credit derivatives 114 — 114 91 — 91 Other (6) 1 — 1 4 — 4 Total derivative assets ¥ 14,958 ¥ — ¥ 14,958 ¥ 13,673 ¥ — ¥ 13,673 Derivative liabilities: Interest rate contracts ¥ 10,205 ¥ — ¥ 10,205 ¥ 9,640 ¥ — ¥ 9,640 Foreign exchange contracts 3,604 4 3,608 2,754 3 2,757 Equity contracts 277 — 277 223 — 223 Commodity contracts 26 — 26 30 — 30 Credit derivatives 95 — 95 91 — 91 Other (6) (177 ) — (177 ) (105 ) — (105 ) Total derivative liabilities ¥ 14,030 ¥ 4 ¥ 14,034 ¥ 12,633 ¥ 3 ¥ 12,636 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 and (3) The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by certain subsidiaries. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying condensed 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 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. (6) Other mainly include s Loan s
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 Foreign exchange Trading account Total (in billions) Six months ended September 30, 2019: Interest rate contracts ¥ — ¥ 122 ¥ 122 Foreign exchange contracts (185 ) — (185 ) Equity contracts — (58 ) (58 ) Commodity contracts — (15 ) (15 ) Credit derivatives — (23 ) (23 ) Other — (48 ) (48 ) Total ¥ (185 ) ¥ (22 ) ¥ (207 ) Six months ended September 30, 2020: Interest rate contracts ¥ — ¥ 136 ¥ 136 Foreign exchange contracts 74 — 74 Equity contracts — (37 ) (37 ) Credit derivatives — 2 2 Other 9 (94 ) (85 ) Total ¥ 83 ¥ 7 ¥ 90
Protection Sold Through Credit Derivatives [Table Text Block]	Protection sold Maximum potential/Notional amount Fair value At March 31, 2020: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 303,870 ¥ 2,125,006 ¥ 494,040 ¥ 2,922,916 ¥ (63,855 ) Non-investment 93,671 279,892 49,681 423,244 3,358 Not rated 2,453 6,826 — 9,279 (18 ) Total 399,994 2,411,724 543,721 3,355,439 (60,515 ) Index and basket credit default swaps held by BK: Investment grade (2) — 28,296 — 28,296 (3 ) Non-investment — 99,035 — 99,035 (1,195 ) Total — 127,331 — 127,331 (1,198 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 20,000 182,306 14,950 217,256 (1,820 ) Non-investment — 7,595 — 7,595 (165 ) Not rated 28,296 190,398 5,316 224,010 (5,205 ) Total 48,296 380,299 20,266 448,861 (7,190 ) Total index and basket credit default swaps sold 48,296 507,630 20,266 576,192 (8,388 ) Total credit default swaps sold ¥ 448,290 ¥ 2,919,354 ¥ 563,987 ¥ 3,931,631 ¥ (68,903 ) Protection sold Maximum potential/Notional amount by Fair value At September 30, 2020: 1 year 1-5 years Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 360,206 ¥ 2,216,372 ¥ 648,184 ¥ 3,224,762 ¥ (47,942 ) Non-investment 118,924 377,967 87,198 584,089 12,209 Not rated 848 2,437 — 3,285 (121 ) Total 479,978 2,596,776 735,382 3,812,136 (35,854 ) Index and basket credit default swaps held by BK: Investment grade (2) — 367,247 47,557 414,804 (33 ) Non-investment 11,638 84,640 — 96,278 (1,449 ) Total 11,638 451,887 47,557 511,082 (1,482 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 36,000 169,791 6,820 212,611 (3,265 ) Non-investment — 7,504 — 7,504 (141 ) Not rated 32,038 239,229 16,207 287,474 (3,945 ) Total 68,038 416,524 23,027 507,589 (7,351 ) Total index and basket credit default swaps sold 79,676 868,411 70,584 1,018,671 (8,833 ) Total credit default swaps sold ¥ 559,654 ¥ 3,465,187 ¥ 805,966 ¥ 4,830,807 ¥ (44,687 ) 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-

Obligations under Guarantees _2

Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Text Block [Abstract]
Contractual or Notional Amounts of Guarantees [Table Text Block]	March 31, 2020 September 30, 2020 (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,895 Performance guarantees 3,058 2,974 Derivative instruments (1)(2) 58,836 45,827 Liabilities of trust accounts 13,142 12,058 Other 88 38 Total ¥ 79,222 ¥ 64,792 Notes: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation. (2) 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.
Maximum Potential Amount of Future Payments Classified Based upon Internal Credit Ratings [Table Text Block]	At March 31, 2020 Maximum Amount by borrower grade Normal Close (1) Likely to (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,984 ¥ 93 ¥ 17 ¥ 4 Performance guarantees 3,058 2,904 96 36 22 Total ¥ 7,156 ¥ 6,888 ¥ 189 ¥ 53 ¥ 26 At September 30, 2020 Maximum Amount by borrower grade Normal Close (1) Likely to (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 3,895 ¥ 3,785 ¥ 89 ¥ 17 ¥ 4 Performance guarantees 2,974 2,853 76 19 26 Total ¥ 6,869 ¥ 6,638 ¥ 165 ¥ 36 ¥ 30 Note: (1 ) See Notes of the tables regarding “the maximum potential amount of future payments classified based upon internal credit ratings “in Note 24 2020
Contractual Amounts with Regard to Other Off-balance Sheet Instruments [Table Text Block]	March 31, September 30, (in billions) Commitments to extend credit ¥ 76,398 ¥ 84,339 Commercial letters of credit 757 680 Commitments to make investments 247 256 Other 5 6

Variable Interest Entities _T_2

Variable Interest Entities [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Consolidated VIEs [Member]
Assets and Liabilities of Variable Interest Entities [Table Text Block]	Consolidated VIEs Consolidated assets At March 31, 2020: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,263,082 ¥ 102,781 ¥ 31,625 ¥ 12,989 ¥ 1,195,283 ¥ 4,913,939 ¥ 6,465 Investment funds 493,757 — 16,482 314,074 34,121 — 129,080 Special purpose entities created for structured financing 204,047 — 2,658 — — 119,348 82,041 Repackaged instruments 249,529 1,330 — 42,052 118,776 86,859 512 Securitization of the MUFG Group’s assets 10,956,261 — — — — 10,933,580 22,681 Trust arrangements 7,527,539 — 654 336,546 745,846 6,441,864 2,629 Other 31,295 350 2,055 — — 6,885 22,005 Total consolidated assets before elimination 25,725,510 104,461 53,474 705,661 2,094,026 22,502,475 265,413 The amounts eliminated in consolidation (6,877,849 ) (103,615 ) (23,427 ) (10,592 ) (289,567 ) (6,429,880 ) (20,768 ) Total consolidated assets ¥ 18,847,661 ¥ 846 ¥ 30,047 ¥ 695,069 ¥ 1,804,459 ¥ 16,072,595 ¥ 244,645 Consolidated liabilities Total Deposits Other Long-term All other (in millions) Asset-backed conduits ¥ 6,253,318 ¥ — ¥ 4,327,685 ¥ 1,478,921 ¥ 446,712 Investment funds 15,817 — — 5,546 10,271 Special purpose entities created for structured financing 114,357 — — 112,474 1,883 Repackaged instruments 251,056 — 65,965 163,833 21,258 Securitization of the MUFG Group’s assets 10,924,830 — 16,008 10,077,839 830,983 Trust arrangements 7,522,190 6,743,261 — — 778,929 Other 27,302 — 5,989 1,321 19,992 Total consolidated liabilities before elimination 25,108,870 6,743,261 4,415,647 11,839,934 2,110,028 The amounts eliminated in consolidation (15,045,398 ) (703 ) (2,526,893 ) (11,374,581 ) (1,143,221 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,465,320 ) (6,742,558 ) (1,857,923 ) (1 ) (864,838 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 598,152 ¥ — ¥ 30,831 ¥ 465,352 ¥ 101,969 Consolidated VIEs Consolidated assets At September 30, 2020: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 5,469,538 ¥ 41,437 ¥ 29,879 ¥ 11,056 ¥ 1,035,425 ¥ 4,313,554 ¥ 38,187 Investment funds 454,682 — 14,905 304,249 37,550 — 97,978 Special purpose entities created for structured financing 178,382 — 1,581 2,631 — 121,556 52,614 Repackaged instruments 246,388 1,628 — 42,725 115,302 86,474 259 Securitization of the MUFG Group’s assets 10,948,652 — — — — 10,928,152 20,500 Trust arrangements 7,871,857 — — 493,749 811,669 6,566,438 1 Other 26,902 327 3,591 — — 5,556 17,428 Total consolidated assets before elimination 25,196,401 43,392 49,956 854,410 1,999,946 22,021,730 226,967 The amounts eliminated in consolidation (7,182,793 ) (42,254 ) (20,600 ) (7,345 ) (426,809 ) (6,665,007 ) (20,778 ) Total consolidated assets ¥ 18,013,608 ¥ 1,138 ¥ 29,356 ¥ 847,065 ¥ 1,573,137 ¥ 15,356,723 ¥ 206,189 Consolidated liabilities Total Deposits Other Long-term All other (in millions) Asset-backed conduits ¥ 5,468,866 ¥ — ¥ 3,584,976 ¥ 1,456,023 ¥ 427,867 Investment funds 12,773 — — 5,438 7,335 Special purpose entities created for structured financing 96,885 — — 88,959 7,926 Repackaged instruments 247,379 — 20,836 162,788 63,755 Securitization of the MUFG Group’s assets 10,939,846 — 17,957 10,442,692 479,197 Trust arrangements 7,871,292 6,961,743 58,159 — 851,390 Other 22,969 — 4,294 1,259 17,416 Total consolidated liabilities before elimination 24,660,010 6,961,743 3,686,222 12,157,159 1,854,886 The amounts eliminated in consolidation (14,821,066 ) — (2,069,125 ) (11,776,218 ) (975,723 ) The amount of liabilities with recourse to the (9,368,713 ) (6,961,743 ) (1,586,600 ) — (820,370 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have ¥ 470,231 ¥ — ¥ 30,497 ¥ 380,941 ¥ 58,793
Non-consolidated VIEs [Member]
Assets and Liabilities of Variable Interest Entities [Table Text Block]	Non-consolidated On-balance On-balance sheet At March 31, 2020 Total assets Maximum Total Trading Investment Loans All other Total All other (in millions) Asset-backed conduits ¥ 27,700,099 ¥ 5,836,895 ¥ 4,797,551 ¥ 190 ¥ 1,737,979 ¥ 3,059,382 ¥ — ¥ — ¥ — Investment funds 55,644,434 1,918,403 1,712,037 437,858 525,022 724,253 24,904 356,679 356,679 Special purpose entities created for structured financing 37,026,192 3,601,834 2,764,156 392,588 35,774 2,317,128 18,666 6,058 6,058 Repackaged instruments 8,215,327 3,030,263 2,931,617 394,478 2,123,058 361,184 52,897 — — Other 54,962,702 2,940,349 2,314,142 191,646 — 1,995,985 126,511 41,693 41,693 Total ¥ 183,548,754 ¥ 17,327,744 ¥ 14,519,503 ¥ 1,416,760 ¥ 4,421,833 ¥ 8,457,932 ¥ 222,978 ¥ 404,430 ¥ 404,430 Non-consolidated VIEs On-balance On-balance sheet At September 30, 2020 Total assets Maximum Total Trading Investment Loans All other Total All other (in millions) Asset-backed conduits ¥ 23,625,636 ¥ 5,601,213 ¥ 4,323,980 ¥ 196 ¥ 1,640,676 ¥ 2,683,108 ¥ — ¥ — ¥ — Investment funds 56,790,968 2,395,171 1,968,163 562,081 531,817 832,961 41,304 — — Special purpose entities created for structured financing 38,824,813 3,850,285 2,854,711 434,870 1,005 2,415,283 3,553 8,687 8,687 Repackaged instruments 8,894,052 2,927,552 2,859,769 387,971 1,995,105 443,619 33,074 — — Other 53,978,941 2,662,086 1,997,173 172,260 — 1,733,234 91,679 23,753 23,753 Total ¥ 182,114,410 ¥ 17,436,307 ¥ 14,003,796 ¥ 1,557,378 ¥ 4,168,603 ¥ 8,108,205 ¥ 169,610 ¥ 32,440 ¥ 32,440

Fees and Commissions Income __2

Fees and Commissions Income [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Details of Fees and Commissions Income [Table Text Block]	2019 2020 (in millions) Fees and commissions on deposits ¥ 26,731 ¥ 26,221 Fees and commissions on remittances and transfers 83,541 82,125 Fees and commissions on foreign trading business 33,117 29,195 Fees and commissions on credit card business 118,916 96,131 Fees and commissions on security-related services 108,403 121,629 Fees and commissions on administration and management services for investment funds 71,981 106,186 Trust fees 58,948 61,003 Guarantee fees (1) 22,846 22,802 Insurance commissions 21,178 19,444 Fees and commissions on real estate business 21,094 13,917 Other fees and commissions (2) 131,708 121,119 Total ¥ 698,463 ¥ 699,772 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

Business Segments _Text Block_

Business Segments [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Financial Information by Business Segment [Table Text Block]	Customer Business Retail & Japanese Global Global Asset Total Global Other Total (in billions) Six months ended September 30, 2019: Net revenue: ¥ 723.9 ¥ 276.2 ¥ 199.6 ¥ 366.5 ¥ 101.3 ¥ 1,667.5 ¥ 336.1 ¥ 2.2 ¥ 2,005.8 BK and TB (1): 345.1 210.0 137.2 (0.8 ) 45.6 737.1 239.4 35.1 1,011.6 Net interest income 225.5 92.4 59.5 0.1 0.8 378.3 71.8 40.5 490.6 Net fees 105.2 92.4 78.0 — 44.8 320.4 (6.5 ) (22.6 ) 291.3 Other 14.4 25.2 (0.3 ) (0.9 ) — 38.4 174.1 17.2 229.7 Other than BK and TB 378.8 66.2 62.4 367.3 55.7 930.4 96.7 (32.9 ) 994.2 Operating expenses 590.4 160.2 126.8 270.8 65.3 1,213.5 113.3 60.7 1,387.5 Operating profit (loss) ¥ 133.5 ¥ 116.0 ¥ 72.8 ¥ 95.7 ¥ 36.0 ¥ 454.0 ¥ 222.8 ¥ (58.5 ) ¥ 618.3 Six months ended September 30, 2020: Net revenue: ¥ 662.7 ¥ 249.8 ¥ 197.5 ¥ 415.3 ¥ 138.1 ¥ 1,663.4 ¥ 461.7 ¥ 4.1 ¥ 2,129.2 BK and TB (1) 304.9 198.3 117.6 0.4 46.8 668.0 343.6 38.0 1,049.6 Net interest income 203.6 79.4 57.9 0.5 2.2 343.6 103.4 44.2 491.2 Net fees 90.6 95.9 67.5 — 44.6 298.6 1.4 (27.3 ) 272.7 Other 10.7 23.0 (7.8 ) (0.1 ) — 25.8 238.8 21.1 285.7 Other than BK and TB 357.8 51.5 79.9 414.9 91.3 995.4 118.1 (33.9 ) 1,079.6 Operating expenses 553.6 152.5 131.8 264.3 101.5 1,203.7 112.5 77.6 1,393.8 Operating profit (loss) ¥ 109.1 ¥ 97.3 ¥ 65.7 ¥ 151.0 ¥ 36.6 ¥ 459.7 ¥ 349.2 ¥ (73.5 ) ¥ 735.4 Note: (1) “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 Condensed Consolidated Statements of Income [Table Text Block]	Six months ended 2019 2020 (in billions) Operating profit ¥ 618 ¥ 735 Provision (102 ) (210 ) Foreign exchange gains (losses)—net (32 ) 87 Trading account profits —net 505 83 Equity investment securities gains (losses)—net (26 ) 694 Debt investment securities losses—net (136 ) (204 ) Equity in earnings of equity method investees—net 165 140 Impairment of goodwill (241 ) (106 ) Reversal of off-balance 63 37 Other—net 24 (110 ) Income before income tax expense ¥ 838 ¥ 1,146

Fair Value _Text Block_ (Tables

Fair Value [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Assets and Liabilities Measured at Fair Value by Level on Recurring Basis [Table Text Block]	At March 31, 2020 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 14,891,635 ¥ 17,061,985 ¥ 525,946 ¥ 32,479,566 Debt securities Japanese national government and Japanese government agency bonds 3,805,039 350,128 — 4,155,167 Japanese prefectural and municipal bonds — 93,479 — 93,479 Foreign government and official institution bonds 9,356,427 417,766 1,052 9,775,245 Corporate bonds 11 2,537,559 144 2,537,714 Residential mortgage-backed securities — 9,037,539 — 9,037,539 Asset-backed securities — 590,556 416,259 1,006,815 Other debt securities — 7,787 6,651 14,438 Commercial paper — 2,959,580 — 2,959,580 Equity securities (2) 1,730,158 1,067,591 101,840 2,899,589 Trading derivative assets 216,834 14,680,632 60,108 14,957,574 Interest rate contracts 74,488 10,758,790 13,329 10,846,607 Foreign exchange contracts 1,550 3,723,087 9,046 3,733,683 Equity contracts 140,796 87,285 7,491 235,572 Commodity contracts — 10 27,492 27,502 Credit derivatives — 111,460 2,750 114,210 Investment securities: Available-for-sale 22,126,881 11,798,392 274,930 34,200,203 Japanese national government and Japanese government agency bonds 19,897,187 3,565,692 — 23,462,879 Japanese prefectural and municipal bonds — 2,952,820 — 2,952,820 Foreign government and official institution bonds 2,229,694 792,027 15,767 3,037,488 Corporate bonds — 1,262,718 10,108 1,272,826 Residential mortgage-backed securities — 1,459,378 15 1,459,393 Commercial mortgage-backed securities — 380,278 1,977 382,255 Asset-backed securities — 1,328,601 140,875 1,469,476 Other debt securities — 56,878 106,188 163,066 Equity securities 4,471,499 296,819 39,963 4,808,281 Marketable equity securities 4,471,499 296,819 — 4,768,318 Nonmarketable equity securities (3) — — 39,963 39,963 Other (4) 1,054,186 45,913 36,701 1,136,800 Total ¥ 42,761,035 ¥ 43,883,741 ¥ 937,648 ¥ 87,582,424 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 555,664 ¥ 3,718 ¥ — ¥ 559,382 Trading derivative liabilities 300,215 13,851,205 56,631 14,208,051 Interest rate contracts 153,098 10,038,198 14,079 10,205,375 Foreign exchange contracts 3,360 3,596,589 4,041 3,603,990 Equity contracts 143,757 121,229 11,713 276,699 Commodity contracts — 14 26,775 26,789 Credit derivatives — 95,175 23 95,198 Obligation to return securities received as collateral (5) 4,663,068 143,103 — 4,806,171 Other (6) — 514,003 6,606 520,609 Total ¥ 5,518,947 ¥ 14,512,029 ¥ 63,237 ¥ 20,094,213 At September 30, 2020 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 19,178,865 ¥ 12,313,174 ¥ 779,709 ¥ 32,271,748 Debt securities Japanese national government and Japanese government agency bonds 5,997,301 363,252 — 6,360,553 Japanese prefectural and municipal bonds — 95,846 — 95,846 Foreign government and official institution bonds 11,797,972 694,545 1,122 12,493,639 Corporate bonds — 2,479,587 — 2,479,587 Residential mortgage-backed securities 120 5,018,942 — 5,019,062 Asset-backed securities — 817,786 413,305 1,231,091 Other debt securities — 7,579 269,984 277,563 Commercial paper — 1,626,513 — 1,626,513 Equity securities (2) 1,383,472 1,209,124 95,298 2,687,894 Trading derivative assets 96,022 13,507,030 67,440 13,670,492 Interest rate contracts 20,459 10,440,306 16,159 10,476,924 Foreign exchange contracts 588 2,849,093 10,612 2,860,293 Equity contracts 74,975 129,075 6,242 210,292 Commodity contracts — 5 30,550 30,555 Credit derivatives — 88,539 2,526 91,065 Other (7) — 12 1,351 1,363 Investment securities: Available-for-sale 32,362,705 12,401,919 247,927 45,012,551 Japanese national government and Japanese government agency bonds 30,410,927 3,398,541 — 33,809,468 Japanese prefectural and municipal bonds — 3,343,506 — 3,343,506 Foreign government and official institution bonds 1,951,778 859,040 16,759 2,827,577 Corporate bonds — 1,221,142 145 1,221,287 Residential mortgage-backed securities — 1,385,579 15 1,385,594 Commercial mortgage-backed securities — 441,505 1,796 443,301 Asset-backed securities — 1,138,145 126,597 1,264,742 Other debt securities — 174,403 102,615 277,018 Commercial Paper — 440,058 — 440,058 Equity securities 4,976,057 344,445 45,764 5,366,266 Marketable equity securities 4,976,057 344,445 — 5,320,502 Nonmarketable equity securities (3) — — 45,764 45,764 Other (4) 780,868 32,590 22,649 836,107 Total ¥ 57,394,517 ¥ 38,599,158 ¥ 1,163,489 ¥ 97,157,164 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 106,076 ¥ 2,722 ¥ — ¥ 108,798 Trading derivative liabilities 139,392 12,551,354 47,204 12,737,950 Interest rate contracts 35,749 9,596,157 7,754 9,639,660 Foreign exchange contracts 944 2,748,606 4,170 2,753,720 Equity contracts 102,699 115,816 4,317 222,832 Commodity contracts — 5 30,621 30,626 Credit derivatives — 90,756 61 90,817 Other (7) — 14 281 295 Obligation to return securities received as collateral (5) 5,038,763 107,149 — 5,145,912 Other (6) — 418,084 49,251 467,335 Total ¥ 5,284,231 ¥ 13,079,309 ¥ 96,455 ¥ 18,459,995 Notes: (1) Includes securities measured under the fair value option. (2) Excludes ( 3 Excludes certain investments valued at net asset value of real estate funds and private equity and other funds whose fair values at March 31, 2020 were ¥23,233 million and ¥18,862 million respectively, and those at September 30, 2020 were ¥23,838 million and ¥17,951 million respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2020 were ¥1,494 million and nil, respectively, and those at September 30, 2020 were ¥1,307 million and nil (4) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions and money in trust for segregating cash deposited by customers on security transactions. (5) Included in Other liabilities. (6) Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments. (7) From the period ended September 30, 2020, certain derivatives such as earthquake derivatives previously included in Commodity contracts are separately disclosed in Other of Trading derivative assets and liabilities.
Reconciliation of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 Inputs [Table Text Block]	Total gains (losses) Change in March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, (in millions) Assets Trading account assets: Trading securities (1) ¥ 785,326 ¥ (20,158 ) (2) ¥ — ¥ 134,609 ¥ — ¥ (120,505 ) ¥ (105,890 ) ¥ 24,882 ¥ (15,402 ) ¥ 682,862 ¥ (19,011 ) (2) Debt securities Foreign government and official institution bonds 792 347 — 50,548 — (48,068 ) (18 ) — — 3,601 (11 ) Corporate bonds 31,384 (76 ) — — — (1,049 ) (3,621 ) 24,882 (5) (15,402 ) (5) 36,118 6 Residential mortgage-backed securities 35,181 (1,425 ) — — — (11,134 ) (10,649 ) — — 11,973 (1,109 ) Asset-backed securities 627,678 (20,780 ) — 79,717 — (60,249 ) (89,939 ) — — 536,427 (18,740 ) Other debt securities 35,148 (952 ) — — — — — — — 34,196 (952 ) Equity securities 55,143 2,728 — 4,344 — (5 ) (1,663 ) — — 60,547 1,795 Trading derivatives—net 36,170 4,283 (2) (107 ) 99 (773 ) — (21,616 ) 37,553 (321 ) 55,288 1,797 (2) Interest rate contracts—net (4,189 ) 14,185 (113 ) — — — (5,471 ) 2,976 (340 ) 7,048 6,246 Foreign exchange contracts—net 18,191 (10,614 ) (87 ) 3 — — 4,037 34,577 (5) (144 ) 45,963 (5,580 ) Equity contracts—net 2,862 743 87 96 (419 ) — (5,350 ) — 163 (1,818 ) 703 Commodity contracts—net 949 (27 ) 2 — (354 ) — — — — 570 645 Credit derivatives—net 18,357 (4 ) 4 — — — (14,832 ) — — 3,525 (217 ) Investment securities: Available-for-sale 283,434 1,331 (3) (5,379 ) 134,575 — — (162,520 ) 5,450 (3,020 ) 253,871 (619 ) (3) Foreign government and official institution bonds 19,246 — 209 382 — — (5,835 ) — — 14,002 — Corporate bonds 4,196 (383 ) 114 20 — — (641 ) 5,450 (5) (3,020 ) (5) 5,736 (619 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,038 — 58 — — — (33 ) — — 2,063 — Asset-backed securities 131,455 1,714 (3,914 ) 134,169 — — (132,544 ) — — 130,880 — Other debt securities 126,484 — (1,846 ) 4 — — (23,467 ) — — 101,175 — Equity securities 27,820 2,660 (3) — 5,636 — (1,515 ) (1 ) — (202 ) 34,398 1,736 (3) Nonmarketable equity securities 27,820 2,660 — 5,636 — (1,515 ) (1 ) — (202 ) 34,398 1,736 Other 32,378 (8,350 ) (7) (1,732 ) 35,894 — (48 ) (1 ) — — 58,141 (8,346 ) (7) Total ¥ 1,165,128 ¥ (20,234 ) ¥ (7,218 ) ¥ 310,813 ¥ (773 ) ¥ (122,068 ) ¥ (290,028 ) ¥ 67,885 ¥ (18,945 ) ¥ 1,084,560 ¥ (24,443 ) Liabilities Other ¥ 65,648 ¥ (18,504 ) (4) ¥ 1,807 ¥ — ¥ 2,338 ¥ — ¥ (9,708 ) ¥ 1,171 (6) ¥ (37,043 ) (6) ¥ 39,103 ¥ (16,212 ) (4) Total ¥ 65,648 ¥ (18,504 ) ¥ 1,807 ¥ — ¥ 2,338 ¥ — ¥ (9,708 ) ¥ 1,171 ¥ (37,043 ) ¥ 39,103 ¥ (16,212 ) Total gains (losses) Change in March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, (in millions) Assets Trading account assets: Trading securities (1) ¥ 525,946 ¥ (627 ) (2) ¥ — ¥ 158,481 ¥ — ¥ (65,231 ) ¥ (2,091 ) ¥ 190,391 ¥ (27,160 ) ¥ 779,709 ¥ (1,434 ) (2) Debt securities Foreign government and official institution bonds 1,052 188 — 12,625 — (12,713 ) (14 ) — (16 ) 1,122 78 Corporate bonds 144 35 — — — (179 ) — — — — — Asset-backed securities 416,259 (1,685 ) — 46,455 — (46,700 ) (1,024 ) — — 413,305 (1,728 ) Other debt securities 6,651 3,446 — 69,498 — — — 190,389 (8) — 269,984 3,446 Equity securities 101,840 (2,611 ) — 29,903 — (5,639 ) (1,053 ) 2 (27,144 ) (8) 95,298 (3,230 ) Trading derivatives—net 3,477 33,219 (2) (757 ) 595 (334 ) — (15,112 ) (392 ) (460 ) 20,236 7,640 (2) Interest rate contracts—net (750 ) 13,271 (341 ) — — — (3,364 ) (15 ) (396 ) 8,405 5,130 Foreign exchange contracts—net 5,005 1,909 (276 ) — — — 159 (377 ) 22 6,442 1,226 Equity contracts—net (4,222 ) 18,054 (145 ) — — — (11,748 ) — (14 ) 1,925 1,288 Commodity contracts—net (65 ) (11 ) 5 — — — — — — (71 ) — Credit derivatives—net 2,727 (103 ) — — — — (159 ) — — 2,465 (103 ) Other—net (9) 782 99 — 595 (334 ) — — — (72 ) 1,070 99 Investment securities: Available-for-sale 274,930 (1,478 ) (3) (4,400 ) 130,042 — (11 ) (141,214 ) 20 (9,962 ) 247,927 (206 ) (3) Foreign government and official institution bonds 15,767 — (682 ) 3,230 — — (1,556 ) — — 16,759 — Corporate bonds 10,108 (3 ) — — — — (18 ) 20 (9,962 ) (5) 145 (4 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 1,977 — (149 ) — — (11 ) (21 ) — — 1,796 — Asset-backed securities 140,875 (1,475 ) (2,416 ) 126,800 — — (137,187 ) — — 126,597 (202 ) Other debt securities 106,188 — (1,153 ) 12 — — (2,432 ) — — 102,615 — Equity securities 39,963 (423 ) (3) — 6,413 — (464 ) — 285 (10 ) 45,764 (665 ) (3) Nonmarketable equity securities 39,963 (423 ) — 6,413 — (464 ) — 285 (10 ) 45,764 (665 ) Other 36,701 (14,583 ) (7) (500 ) 1,121 — — (90 ) — — 22,649 (14,577 ) (7) Total ¥ 881,017 ¥ 16,108 ¥ (5,657 ) ¥ 296,652 ¥ (334 ) ¥ (65,706 ) ¥ (158,507 ) ¥ 190,304 ¥ (37,592 ) ¥ 1,116,285 ¥ (9,242 ) Liabilities Other ¥ 6,606 ¥ (18,465 ) (4) ¥ 3,711 ¥ — ¥ 30,192 ¥ — ¥ (9,309 ) ¥ 11,330 (6) ¥ (4,322 ) (6) ¥ 49,251 ¥ (14,090 ) (4) Total ¥ 6,606 ¥ (18,465 ) ¥ 3,711 ¥ — ¥ 30,192 ¥ — ¥ (9,309 ) ¥ 11,330 ¥ (4,322 ) ¥ 49,251 ¥ (14,090 ) Notes: (1 ) Includes Trading securities measured under the fair value option. (2 ) Included in Trading account profits—net and Foreign exchange gains (losses)—net. (3 ) Included in Investment securities gains—net and Other comprehensive income—net. (4 ) Included in Trading account profits—net. (5 ) Transfers into Level 3 for Foreign exchange contracts—net were mainly caused by the valuation using certain unobservable input. For the six months ended September 30, 2019, transfers into (out of) Level 3 for corporate bonds were mainly caused by the decrease (increase) in liquidity or the availability of the quoted prices provided by third-party venders. For the six months ended September 30, 2020, transfers out of Level 3 for corporate bonds were due to changes in the impact of unobservable credit worthiness inputs to the entire fair value measurement of the private placement bonds issued by Japanese non-public companies. Unobservable credit worthiness inputs include probability of default based on credit ratings of the bond issuers and loss given default. (6 ) Transfers into (out of) Level 3 for embedded derivatives in Other 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 Fees and commissions income and Other non-interest (8 ) Transfers relate to the reclassification of certain securities (9 ) From the period ended September 30, 2020, certain derivatives such as earthquake derivatives previously included in Commodity contracts—net are separately disclosed in Other—net of Trading derivatives—net.
Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level [Table Text Block]	March 31, 2020 September 30, 2020 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ 15,473 ¥ 2,703 ¥ 18,176 ¥ — ¥ 11,091 ¥ 1,901 ¥ 12,992 Loans 2,548 9,199 260,282 272,029 2,648 9,800 263,428 275,876 Loans held for sale — — 73,573 73,573 — — 44,210 44,210 Collateral dependent loans 2,548 9,199 186,709 198,456 2,648 9,800 219,218 231,666 Premises and equipment — — 37,109 37,109 — — 7,877 7,877 Intangible assets — — 453 453 — — 1,357 1,357 Goodwill — — 283,032 283,032 — — 97,072 97,072 Other assets 73,015 — 18,609 91,624 111,626 33,840 9,075 154,541 Investments in equity method investees (1) 73,015 — 5,911 78,926 111,626 33,840 — 145,466 Other — — 12,698 12,698 — — 9,075 9,075 Total ¥ 75,563 ¥ 24,672 ¥ 602,188 ¥ 702,423 ¥ 114,274 ¥ 54,731 ¥ 380,710 ¥ 549,715 Notes: (1 ) Excludes certain investments valued at net asset value of ¥12,935 million and ¥10,031 million at March 31, 2020 and September 30, 2020, respectively. The unfunded commitments related to these investments are ¥17,216 million and ¥13,219 million at March 31, 2020 and September 30, 2020, respectively. These investments are in private equity funds. For the nature and details of private equity funds, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. (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]	Losses(gains) for the 2019 2020 (in millions) Investment securities ¥ 2,193 ¥ (701 ) Loans 30,664 89,082 Loans held for sale 8,468 5,620 Collateral dependent loans 22,196 83,462 Premises and equipment 5,975 8,569 Intangible assets 2,334 4,286 Goodwill 241,356 106,479 Other assets 15,437 87,584 Investments in equity method investees 4,944 53,138 Other 10,493 34,446 Total ¥ 297,959 ¥ 295,299
Gains (Losses) Related to Instruments for which Fair Value Option was Elected [Table Text Block]	Six months ended September 30, 2019 2020 Trading Foreign Total Trading Foreign Total (in millions) Financial assets: Trading account securities ¥ 437,931 ¥ (654,622 ) ¥ (216,691 ) ¥ 148,265 ¥ (237,425 ) ¥ (89,160 ) Total ¥ 437,931 ¥ (654,622 ) ¥ (216,691 ) ¥ 148,265 ¥ (237,425 ) ¥ (89,160 ) Financial liabilities: Other short-term borrowings (1) ¥ (778 ) ¥ — ¥ (778 ) ¥ (15,805 ) ¥ — ¥ (15,805 ) Long-term debt (1) (20,559 ) — (20,559 ) (16,945 ) — (16,945 ) Total ¥ (21,337 ) ¥ — ¥ (21,337 ) ¥ (32,750 ) ¥ — ¥ (32,750 ) Note: (1) 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]	March 31, 2020 September 30, 2020 Remaining Fair value Fair value Remaining Fair value Fair value (in millions) Financial liabilities: Long-term debt ¥ 319,149 ¥ 304,067 ¥ (15,082 ) ¥ 416,035 ¥ 393,710 ¥ (22,325 ) Total ¥ 319,149 ¥ 304,067 ¥ (15,082 ) ¥ 416,035 ¥ 393,710 ¥ (22,325 )
Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Not Carried at Fair Value on Recurring Basis on Condensed Consolidated Balance Sheets by Level [Table Text Block]	At March 31, 2020 Carrying Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 33,283 ¥ 33,283 ¥ 33,283 ¥ — ¥ — Interest-earning deposits in other banks 45,267 45,267 — 45,267 — Call loans and funds sold 1,169 1,169 — 1,169 — Receivables under resale agreements 23,996 23,996 — 23,996 — Receivables under securities borrowing transactions 3,444 3,444 — 3,444 — Investment securities 4,166 4,178 1,134 1,042 2,002 Loans, net of allowance for credit losses (1) 117,373 118,497 3 259 118,235 Other financial assets (2) 8,494 8,494 — 8,494 — Financial liabilities: Deposits Non-interest-bearing ¥ 33,382 ¥ 33,382 ¥ — ¥ 33,382 ¥ — Interest-bearing 170,574 170,631 — 170,631 — Total deposits 203,956 204,013 — 204,013 — Call money and funds purchased 3,669 3,669 — 3,669 — Payables under repurchase agreements 31,850 31,850 — 31,850 — Payables under securities lending transactions 1,017 1,017 — 1,017 — Due to trust account and other short-term borrowings 19,057 19,057 — 19,057 — Long-term debt 27,772 27,941 — 27,941 — Other financial liabilities 7,139 7,139 — 7,139 — At September 30, 2020 Carrying Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 46,982 ¥ 46,982 ¥ 46,982 ¥ — ¥ — Interest-earning deposits in other banks 46,936 46,936 — 46,936 — Call loans and funds sold 1,049 1,049 — 1,049 — Receivables under resale agreements 14,051 14,051 — 14,051 — Receivables under securities borrowing transactions 3,199 3,199 — 3,199 — Investment securities 3,930 3,972 1,127 907 1,938 Loans, net of allowance for credit losses (1) 115,532 116,984 3 265 116,716 Other financial assets (2) 7,194 7,194 — 7,194 — Financial liabilities: Deposits Non-interest-bearing ¥ 35,643 ¥ 35,643 ¥ — ¥ 35,643 ¥ — Interest-bearing 182,750 182,789 — 182,789 — Total deposits 218,393 218,432 — 218,432 — Call money and funds purchased 3,797 3,797 — 3,797 — Payables under repurchase agreements 26,448 26,448 — 26,448 — Payables under securities lending transactions 842 842 — 842 — Due to trust account and other short-term borrowings 14,916 14,916 — 14,916 — Long-term debt 35,391 35,824 — 35,824 — Other financial liabilities 6,880 6,880 — 6,880 — Notes: (1) 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. (2) Excludes investments in equity method investees of ¥2,421 billion and ¥2,327 billion at March 31, 20 20 20
Fair Value, Measurements, Recurring [Member]
Quantitative Information about Level 3 Fair Value Measurements [Table Text Block]	At March 31, 2020 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 ¥ 15,767 Return on equity method Probability of default 0.2%~1.3% 0.4% Recovery rate 55.0%~90.0% 69.9% Market-required return on capital 8.0%~10.0% 9.9% Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed 92,025 Discounted cash flow Probability of default 1.2%~5.3% 5.0% Recovery rate 60.0%~76.0% 68.2% 389,170 Internal model (4) Asset correlations 1.0% 1.0% Discount factor 1.1%~1.4% 1.4% Prepayment rate 21.0% 21.0% Probability of default 0.0%~99.0% — (3) Recovery rate 57.8% 57.8% Other debt securities 6,651 Discounted cash flow Liquidity premium 2.4% 2.4% 86,734 Return on equity method Probability of default 0.0%~25.0% 0.3% Recovery rate 60.0%~90.0% 79.8% Market-required return on capital 8.0%~10.0% 9.4% Equity Securities 27,144 Discounted cash flow Liquidity premium 1.0% 1.0% At March 31, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate (728 ) Option model Correlation between interest rates 32.9%~62.5% Correlation between interest rate and foreign exchange rate 16.7%~60.0% Volatility 0.0%~100.0% Foreign exchange contracts—net 5,005 Option model Correlation between interest rates 30.0%~70.0% Correlation between interest rate and foreign exchange rate 15.8%~60.0% Correlation between foreign exchange rates 60.0% Volatility 7.5%~17.0% Equity contracts—net (10,038 ) Option model Correlation between foreign exchange rate and equity (58.4)%~56.9% Correlation between equities 19.5%~81.0% Volatility 24.2%~32.0% 6,166 Discounted cash flow Term of litigation 0.1year~1.1year s At September 30, 2020 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 ¥ 16,759 Return on equity method Probability of default 0.2%~1.8% 0.6% Recovery rate 35.0%~90.0% 66.6% Market-required return on capital 8.0%~10.0% 9.9% Residential mortgage- backed securities, Commercial mortgage- backed securities and Asset-backed securities 86,222 Discounted cash flow Probability of default 4.6%~5.3% 5.1% Recovery rate 65.0%~76.0% 68.8% 381,036 Internal model (4) Asset correlations 1.0% 1.0% Discount factor 1.5%~1.6% 1.6% Prepayment rate 22.2% 22.2% Probability of default 0.0%~91.1% — (3) Recovery rate 51.1% 51.1% Other debt securities 269,984 Discounted cash flow Liquidity premium 1.0%~3.1% 2.9% 83,647 Return on equity method Probability of default 0.0%~25.0% 0.4% Recovery rate 55.0%~90.0% 78.1% Market-required return on capital 8.0%~10.0% 9.6% At September 30, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 6,917 Option model Correlation between interest rates 30.0%~63.2% 45.7% Correlation between interest rate and foreign exchange rate 15.6%~60.0% 40.3% Volatility 0.0%~100.0% 50.0% Foreign exchange contracts—net 6,442 Option model Correlation between interest rates 30.0%~70.0% 47.4% Correlation between interest rate and foreign exchange rate 17.4%~60.0% 38.5% Correlation between foreign exchange rates 55.0% 55.0% Volatility 9.5%~22.3% 14.4% Equity contracts—net (3,054 ) Option model Correlation between foreign exchange rate and equity (58.4)%~56.4% 32.6% Correlation between equities 19.1%~96.0% 53.7% Volatility 29.0%~40.0% 31.5% 5,091 Discounted cash flow Term of litigation 0.1year~1.2years 0.6year Notes: (1) The fair value as of March 31, 2020 and September 30, 2020 excludes the fair value of investments valued using vendor prices. (2) Weighted average is for investment securities. Median is used for derivative instruments (3) See “Probability of default” in “Sensitivity to and range of unobservable inputs” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020. (4) For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.

Investments in Equity Method _2

Investments in Equity Method Investees [Text Block] (Tables)	6 Months Ended
	Sep. 30, 2020
Morgan Stanley [Member]
Summarized Operating Results of Morgan Stanley [Table Text Block]	Summarized operating results of Morgan Stanley, the largest portion of the MUFG Group’s equity method investees, for the six months ended September 30, 2019 and 2020 are as follows: 2019 2020 (in billions) Net revenues ¥ 2,203 ¥ 2,681 Total non-interest 1,593 1,842 Income from continuing operations before income taxes 610 839 Net income applicable to Morgan Stanley 475 632

Basis of Semiannual Condensed_3

Basis of Semiannual Condensed Consolidated Financial Statements (Narrative) (Detail) - Measurement of Credit Losses on Financial Instruments [Member] ¥ in Billions	Apr. 01, 2020JPY (¥)
Effect of adopting new guidance [Member]
Accounting changes:
Increase in allowance for credit losses	¥ 408.1
Revision of Prior Period, Change in Accounting Principle, Adjustment [Member]
Accounting changes:
Decrease to retained earnings	¥ 285.8

Business Developments (Narrativ

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

Nov. 18, 2019JPY (¥)

Aug. 02, 2019JPY (¥)Subsidiaries

May 01, 2019

Apr. 29, 2019JPY (¥)¥ / shares

Apr. 29, 2019IDR (Rp)

Aug. 03, 2018JPY (¥)

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

Dec. 29, 2017JPY (¥)

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

Sep. 30, 2019JPY (¥)

Sep. 30, 2020JPY (¥)Offices

Sep. 30, 2019JPY (¥)

Mar. 31, 2020JPY (¥)

Apr. 29, 2019Rp / shares

Mar. 31, 2019JPY (¥)

Aug. 03, 2018shares¥ / shares

Dec. 29, 2017shares¥ / shares

Dec. 26, 2017

Business Developments [Line Items]

Goodwill, recorded on acquisition

¥ 616,620

¥ 405,009

¥ 616,620

¥ 517,626

¥ 433,891

Remeasurement profits

¥ 0

41,218

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

Business Developments [Line Items]

Final equity interest expected upon the completion of proposed transactions

73.80%

Number of offices in Indonesia | Offices

900

Description of strategic investment

was executed through three steps (the “Proposed Transaction”), and the completion of the Proposed Transaction resulted 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

94.10%

94.00%

94.00%

40.00%

40.00%

19.90%

19.90%

Additional equity interests acquired, in percentage

54.00%

54.00%

20.10%

20.10%

Price per share paid | (per share)

¥ 77

[1]

Rp 8,921

Rp 8,323

Rp 9,590

¥ 69

[2]

¥ 70

[3]

Investment amount paid

¥ 397,000

Rp 50,000

¥ 132,300

[2]

Rp 17,187

¥ 133,000

[3]

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 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 | shares

2

2

2

2

Goodwill, recorded on acquisition

254,271

Intangible assets, recorded on acquisition

¥ 146,899

Noncontrolling interests, recorded on acquisition

51,314

¥ 51,314

Equity interest remeasured to fair value

271,830

Remeasurement profits

¥ 41,218

Exchange rate of IDR

0.0080

0.0077

0.0084

0.0077

0.0084

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

Business Developments [Line Items]

Equity interest after acquisition, in aggregated percentage

99.90%

99.90%

Additional equity interests acquired, in percentage

92.10%

92.10%

Price per share paid | (per share)

¥ 33

[1]

Rp 4,088

Investment amount paid

¥ 24,100

Rp 3,000

Exchange rate of IDR

0.0080

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

Business Developments [Line Items]

Payment in cash

¥ 312,225

Equity interest after acquisition, in aggregated percentage

100.00%

Goodwill, recorded on acquisition

¥ 177,065

Intangible assets, recorded on acquisition

¥ 105,973

Weighted average amortization period, in years

18 years 8 months 12 days

Number of subsidiaries acquired | Subsidiaries

9

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

Business Developments [Line Items]

Intangible assets, recorded on acquisition

¥ 100,862

Weighted average amortization period, in years

18 years

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

Business Developments [Line Items]

Payment in cash

¥ 555,000

Goodwill, recorded on acquisition

¥ 32,591

Acquisition of DVB Bank SEs Aviation Finance Division [Member] | Maximum [Member]

Business Developments [Line Items]

Goodwill, Purchase Accounting Adjustments

¥ 519

[1]

Calculated based on the exchange rate of IDR1 = ¥0.0080

[2]

Calculated based on the exchange rate of IDR1 = ¥0.0077

[3]

Calculated based on the exchange rate of IDR1 = ¥0.0084

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Investment Securities [Line Items]
Gross realized gains on sales of Available-for-sale debt securities	¥ 23,566	¥ 61,039
Gross realized losses on sales of Available-for-sale debt securities	22,621	15,800
Corporate Bonds [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of debt securities included in Investment securities gains (losses)—net		¥ 661
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

Investment Securities (Amortize

Investment Securities (Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended		12 Months Ended
	Sep. 30, 2020		Mar. 31, 2020
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	¥ 44,660,770		¥ 33,907,767
Available-for-sale debt securities, Gross unrealized gains	381,263		343,331
Available-for-sale debt securities, Gross unrealized losses	29,482		50,895
Available-for-sale debt securities, Fair value	45,012,551		34,200,203
Held-to-maturity debt securities, Amortized cost	3,930,246		4,165,781
Held-to-maturity debt securities, Gross unrealized gains	60,607		43,847
Held-to-maturity debt securities, Gross unrealized losses	18,798		31,734
Held-to-maturity debt securities, Fair value	3,972,055		4,177,894
Japanese National Government and Japanese Government Agency Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	33,645,301		23,308,538
Available-for-sale debt securities, Gross unrealized gains	180,810		185,302
Available-for-sale debt securities, Gross unrealized losses	16,643		30,961
Available-for-sale debt securities, Fair value	33,809,468		23,462,879
Held-to-maturity debt securities, Amortized cost	1,100,508		1,100,574
Held-to-maturity debt securities, Gross unrealized gains	26,632		29,856
Held-to-maturity debt securities, Gross unrealized losses	0
Held-to-maturity debt securities, Fair value	1,127,140		1,130,430
Japanese Prefectural and Municipal Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	3,328,438		2,938,743
Available-for-sale debt securities, Gross unrealized gains	16,585		16,279
Available-for-sale debt securities, Gross unrealized losses	1,517		2,202
Available-for-sale debt securities, Fair value	3,343,506		2,952,820
Foreign Government and Official Institution Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	2,706,767		2,936,110
Available-for-sale debt securities, Gross unrealized gains	123,091		107,406
Available-for-sale debt securities, Gross unrealized losses	2,281		6,028
Available-for-sale debt securities, Fair value	2,827,577		3,037,488
Held-to-maturity debt securities, Amortized cost	133,970		151,555
Held-to-maturity debt securities, Gross unrealized gains	2,043		243
Held-to-maturity debt securities, Gross unrealized losses	0		689
Held-to-maturity debt securities, Fair value	136,013		151,109
Corporate Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,209,772		1,261,586
Available-for-sale debt securities, Gross unrealized gains	12,236		12,445
Available-for-sale debt securities, Gross unrealized losses	721		1,205
Available-for-sale debt securities, Fair value	1,221,287		1,272,826
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,375,478		1,460,641
Available-for-sale debt securities, Gross unrealized gains	11,216		3,083
Available-for-sale debt securities, Gross unrealized losses	1,100		4,331
Available-for-sale debt securities, Fair value	1,385,594		1,459,393
Held-to-maturity debt securities, Amortized cost	605,042		737,242
Held-to-maturity debt securities, Gross unrealized gains	25,670		10,478
Held-to-maturity debt securities, Gross unrealized losses	0	[1]	3,012	[2]
Held-to-maturity debt securities, Fair value	630,712		744,708
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	6,843		8,215
Commercial Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	417,732		379,234
Available-for-sale debt securities, Gross unrealized gains	26,960		6,110
Available-for-sale debt securities, Gross unrealized losses	1,391		3,089
Available-for-sale debt securities, Fair value	443,301		382,255
Held-to-maturity debt securities, Amortized cost	134,202		146,039
Held-to-maturity debt securities, Gross unrealized gains	6,108		2,993
Held-to-maturity debt securities, Gross unrealized losses	15	[1]	317	[2]
Held-to-maturity debt securities, Fair value	140,295		148,715
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	2,593		3,178
Asset-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,262,027		1,461,083
Available-for-sale debt securities, Gross unrealized gains	7,218		9,516
Available-for-sale debt securities, Gross unrealized losses	4,503		1,123
Available-for-sale debt securities, Fair value	1,264,742		1,469,476
Held-to-maturity debt securities, Amortized cost	1,956,524		2,030,371
Held-to-maturity debt securities, Gross unrealized gains	154		277
Held-to-maturity debt securities, Gross unrealized losses	18,783		27,716
Held-to-maturity debt securities, Fair value	1,937,895		2,002,932
Other Debt Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	275,245		161,832	[3]
Available-for-sale debt securities, Gross unrealized gains	3,099		3,190	[3]
Available-for-sale debt securities, Gross unrealized losses	1,326		1,956	[3]
Available-for-sale debt securities, Fair value	277,018		163,066	[3]
Other Debt Securities [Member] | Private Placement Debt Conduit Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value			¥ 86,734
Commercial Paper [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	440,010
Available-for-sale debt securities, Gross unrealized gains	48
Available-for-sale debt securities, Gross unrealized losses	0
Available-for-sale debt securities, Fair value	¥ 440,058
[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 condensed consolidated balance sheets were ¥6,843 million and ¥2,593 million, respectively, at September 30, 2020 and are not included in the table above.
[2]	MUFG Americas Holdings Corporation (“MUFG Americas Holdings” or “MUAH”) 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 condensed consolidated balance sheets were ¥8,215 million and ¥3,178 million, respectively, at March 31, 2020 and are not included in the table above.
[3]	Other debt securities in the table above mainly include ¥86,734 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	Sep. 30, 2020	Mar. 31, 2020
Held-to-maturity debt securities, Amortized cost:
Due in one year or less	¥ 18,595
Due from one year to five years	1,191,186
Due from five years to ten years	610,998
Due after ten years	2,109,467
Held-to-maturity debt securities, Amortized cost	3,930,246	¥ 4,165,781
Held-to-maturity debt securities, Fair value:
Due in one year or less	18,649
Due from one year to five years	1,221,061
Due from five years to ten years	614,175
Due after ten years	2,118,170
Held-to-maturity debt securities, Fair value	3,972,055	4,177,894
Available-for-sale debt securities, Fair value:
Due in one year or less	20,830,504
Due from one year to five years	11,185,978
Due from five years to ten years	6,838,352
Due after ten years	6,157,717
Available-for-sale debt securities, Fair value	¥ 45,012,551	¥ 34,200,203

Investment Securities (Investme

Investment Securities (Investments by Length and Category in Continuous Loss Position) (Detail) ¥ in Millions	Sep. 30, 2020JPY (¥)Securities	Mar. 31, 2020JPY (¥)Securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 14,604,115	¥ 14,344,490
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	25,973	44,087
Available-for-sale debt securities, Fair value, 12 months or more	231,162	646,265
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	3,509	6,808
Available-for-sale debt securities, Fair value, Total	14,835,277	14,990,755
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 29,482	¥ 50,895
Available-for-sale debt securities, Number of securities | Securities	1,033	1,408
Held-to-maturity debt securities, Fair value, Less than 12 months		¥ 811,706
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months		10,290
Held-to-maturity debt securities, Fair value, 12 months or more		1,754,352
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more		21,444
Held-to-maturity debt securities, Fair value, Total		2,566,058
Held-to-maturity debt securities, Gross unrealized losses, Total		¥ 31,734
Held-to-maturity debt securities, Number of securities | Securities		398
Japanese National Government and Japanese Government Agency Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 12,651,521	¥ 11,781,600
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	16,634	30,961
Available-for-sale debt securities, Fair value, 12 months or more	733
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	9
Available-for-sale debt securities, Fair value, Total	12,652,254	11,781,600
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 16,643	¥ 30,961
Available-for-sale debt securities, Number of securities | Securities	186	202
Japanese Prefectural and Municipal Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 715,401	¥ 935,540
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,517	2,202
Available-for-sale debt securities, Fair value, 12 months or more	0
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	0
Available-for-sale debt securities, Fair value, Total	715,401	935,540
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,517	¥ 2,202
Available-for-sale debt securities, Number of securities | Securities	262	340
Foreign Government and Official Institution Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 261,083	¥ 564,620
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	2,278	5,481
Available-for-sale debt securities, Fair value, 12 months or more	36,846	114,407
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	3	547
Available-for-sale debt securities, Fair value, Total	297,929	679,027
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 2,281	¥ 6,028
Available-for-sale debt securities, Number of securities | Securities	42	153
Held-to-maturity debt securities, Fair value, Less than 12 months		¥ 55,746
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months		689
Held-to-maturity debt securities, Fair value, 12 months or more
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more
Held-to-maturity debt securities, Fair value, Total		55,746
Held-to-maturity debt securities, Gross unrealized losses, Total		¥ 689
Held-to-maturity debt securities, Number of securities | Securities		9
Corporate Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 402,062	¥ 522,941
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	718	1,191
Available-for-sale debt securities, Fair value, 12 months or more	4,417	25,228
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	3	14
Available-for-sale debt securities, Fair value, Total	406,479	548,169
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 721	¥ 1,205
Available-for-sale debt securities, Number of securities | Securities	136	154
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 168,166	¥ 114,057
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	400	530
Available-for-sale debt securities, Fair value, 12 months or more	117,942	388,064
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	700	3,801
Available-for-sale debt securities, Fair value, Total	286,108	502,121
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,100	¥ 4,331
Available-for-sale debt securities, Number of securities | Securities	201	402
Held-to-maturity debt securities, Fair value, Less than 12 months		¥ 108,478
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months		1,033
Held-to-maturity debt securities, Fair value, 12 months or more		360,841
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more		1,979
Held-to-maturity debt securities, Fair value, Total		469,319
Held-to-maturity debt securities, Gross unrealized losses, Total		¥ 3,012
Held-to-maturity debt securities, Number of securities | Securities		281
Commercial Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 30,431	¥ 182,887
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,391	3,087
Available-for-sale debt securities, Fair value, 12 months or more	0	1,304
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	0	2
Available-for-sale debt securities, Fair value, Total	30,431	184,191
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,391	¥ 3,089
Available-for-sale debt securities, Number of securities | Securities	36	39
Held-to-maturity debt securities, Fair value, Less than 12 months		¥ 10,281
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months		32
Held-to-maturity debt securities, Fair value, 12 months or more		133,791
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more		285
Held-to-maturity debt securities, Fair value, Total		144,072
Held-to-maturity debt securities, Gross unrealized losses, Total		¥ 317
Held-to-maturity debt securities, Number of securities | Securities		31
Asset-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 204,689	¥ 189,775
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	2,735	503
Available-for-sale debt securities, Fair value, 12 months or more	51,321	86,605
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	1,768	620
Available-for-sale debt securities, Fair value, Total	256,010	276,380
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 4,503	¥ 1,123
Available-for-sale debt securities, Number of securities | Securities	110	94
Held-to-maturity debt securities, Fair value, Less than 12 months		¥ 637,201
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months		8,536
Held-to-maturity debt securities, Fair value, 12 months or more		1,259,720
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more		19,180
Held-to-maturity debt securities, Fair value, Total		1,896,921
Held-to-maturity debt securities, Gross unrealized losses, Total		¥ 27,716
Held-to-maturity debt securities, Number of securities | Securities		77
Other Debt Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 170,762	¥ 53,070
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	300	132
Available-for-sale debt securities, Fair value, 12 months or more	19,903	30,657
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	1,026	1,824
Available-for-sale debt securities, Fair value, Total	190,665	83,727
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,326	¥ 1,956
Available-for-sale debt securities, Number of securities | Securities	60	24

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) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized during the period	[1]	¥ 683,303	¥ (36,019)
Less: Net gains (losses) recognized during the period on equity securities sold during the period		17,136	(9,960)
Net unrealized gains (losses) recognized during the reporting period still held at the reporting date		¥ 666,167	¥ (26,059)
[1]	Included in Investment securities gains—net.

Investment Securities (Carrying

Investment Securities (Carrying Value of Nonmarketable Equity Securities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2020	Mar. 31, 2020
Nonmarketable Equity Securities [Member] | Measurement Alternative [Member]
Investment Securities [Line Items]
Balance	¥ 323,990	¥ 534,882

Investment Securities (Related

Investment Securities (Related Adjustments for Nonmarketable Equity Securities) (Detail) - Nonmarketable Equity Securities [Member] - Measurement Alternative [Member] - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Investment Securities [Line Items]
Impairment losses	[1],[2]	¥ (2,984)	¥ (1,402)
Downward changes for observable prices	[3],[4],[5],[6]		(953)
Upward changes for observable prices	[3],[4],[6],[7]	3,685	¥ 162
Cumulative impairment losses		7,925		¥ 5,007
Cumulative downward changes for observable prices		953		953
Cumulative upward changes for observable prices		¥ 36,782		¥ 34,466
[1]	Included in Investment securities gains—net.
[2]	The cumulative impairment losses at March 31, 2020 and September 30, 2020 were ¥5,007 million and ¥7,925 million, respectively.
[3]	Included in Investment securities gains—net and Other comprehensive income—net.
[4]	The MUFG Group applied measurement alternative downward or upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities.
[5]	The cumulative downward changes for observable prices at March 31, 2020 and September 30, 2020 were ¥953 million and ¥953 million, respectively.
[6]	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.
[7]	The cumulative upward changes for observable prices at March 31, 2020 and September 30, 2020 were ¥34,466 million and ¥36,782 million, respectively.

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses (Narrative) (Detail) - JPY (¥) ¥ in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Apr. 01, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowances for credit losses on other accounts receivable	¥ 14,465	¥ 14,465
Accrued interest receivable	257,551	257,551
Accounts receivable: Other	1,117,650	1,117,650
Measurement of Credit Losses on Financial Instruments [Member] | Effect of adopting new guidance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowances for credit losses on other accounts receivable				¥ 10,248
Foreign Subsidiaries [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Effect of recording a provision for credit losses and a provision for off-balance sheet credit instruments	40,000
Decrease in net income attributable to Mitsubishi UFJ Financial Group	24,000
Call Loans And Funds Sold And Receivables Under Resale And Receivables Under Securities Borrowing Transactions Agreements [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowances for credit losses on other accounts receivable	0	0
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Significant sales of loans		¥ 613,000	¥ 816,000
Commercial [Member] | Economc Forecast Method [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for determining allowances for credit losses		3 years
Commercial [Member] | Average historical loss information [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for determining allowances for credit losses		2 years
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
Residential [Member] | Economc Forecast Method [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for determining allowances for credit losses		3 years
Residential [Member] | Average Historical Loss Method [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for determining allowances for credit losses		2 years
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]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable-Other, past due	5,288	¥ 5,288
Card [Member] | Economc Forecast Method [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for determining allowances for credit losses		3 years
Card [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable-Other, past due	1,931	¥ 1,931
Card [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable-Other, past due	¥ 3,357	¥ 3,357
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] | Economc Forecast Method [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for determining allowances for credit losses		3 years
MUAH [Member] | Average Historical Loss Method [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Period for determining allowances for credit losses		2 years
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] | Minimum [Member] | Under-Performing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Past due period of loans for categorizing internal borrower ratings, from the contractual due date in day		30 days
Krungsri [Member] | Minimum [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Past due period of loans for categorizing internal borrower ratings, from the contractual due date in day		90 days

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		Sep. 30, 2020	Mar. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Unearned income, unamortized premiums-net and deferred loan fees-net		¥ (319,759)	¥ (350,287)
Total Loans, net	[1]	116,748,119	118,186,739
Loans held for sale		315,142	344,790
Domestic [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		68,171,509	65,053,362
Domestic [Member] | Manufacturing [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		13,580,404	11,448,778
Domestic [Member] | Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		729,357	733,212
Domestic [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		12,254,948	12,054,671
Domestic [Member] | Services [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		2,915,608	2,585,111
Domestic [Member] | Wholesale and Retail [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		7,778,422	7,504,561
Domestic [Member] | Banks and Other Financial Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	[2]	5,043,357	5,161,093
Domestic [Member] | Communication and Information Services [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		1,486,217	1,572,344
Domestic [Member] | Other Industries [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		9,420,430	8,673,871
Domestic [Member] | Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		14,962,766	15,319,721
Foreign [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		48,896,369	53,483,664
Foreign [Member] | Governments and Official Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		692,943	726,347
Foreign [Member] | Banks and Other Financial Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	[2]	10,700,402	11,788,225
Foreign [Member] | Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		29,877,321	32,565,030
Foreign [Member] | Other [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		¥ 7,625,703	¥ 8,404,062
[1]	The above table includes loans held for sale of ¥344,790 million at March 31, 2020 and ¥315,142 million at September 30, 2020, 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		6 Months Ended
		Sep. 30, 2020	Mar. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	¥ 955,202	¥ 778,469
Nonaccrual loans not requiring an allowance for credit losses	[2]	190,298
Recognized interest income		11,932
Loans held for sale placed on nonaccrual status		6,767	330
Loans acquired with deteriorated credit quality placed on nonaccrual status			25,427
Commercial [Member] | Domestic [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	357,412	312,972
Nonaccrual loans not requiring an allowance for credit losses	[2]	112,770
Recognized interest income		2,229
Commercial [Member] | Foreign [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	184,317	127,001
Nonaccrual loans not requiring an allowance for credit losses	[2]	53,354
Recognized interest income		2,061
Residential [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	71,976	63,998
Nonaccrual loans not requiring an allowance for credit losses	[2]	4,188
Recognized interest income		488
Card [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	62,012	61,172
Nonaccrual loans not requiring an allowance for credit losses	[2]	641
Recognized interest income		20
MUAH [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	63,782	35,840
Nonaccrual loans not requiring an allowance for credit losses	[2]	16,007
Recognized interest income		483
Krungsri [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	172,239	149,732
Nonaccrual loans not requiring an allowance for credit losses	[2]	3,338
Recognized interest income		3,498
Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	[1]	43,464	¥ 27,754
Recognized interest income		¥ 3,153
[1]	Nonaccrual loans in the above table do not include loans held for sale of ¥330 million and ¥6,767 million at March 31, 2020 and September 30, 2020, respectively, and do not include loans acquired with deteriorated credit quality of ¥25,427 million at March 31, 2020.
[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, or the fair value of the collateral if the loan is a collateral-dependent loan.

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses (Troubled Debt Restructurings by Class) (Detail) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020		Sep. 30, 2019
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment		¥ 122,897		¥ 105,689
Troubled debt restructurings, Post-modification outstanding recorded investment		122,338		105,012
Troubled debt restructurings that subsequently defaulted, Recorded Investment		19,985		16,581
Commercial [Member] | Domestic [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	43,717		20,607
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	43,717		20,607
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	9,280		6,342
Commercial [Member] | Foreign [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	10,292		29,360
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	10,292		29,360
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	3,940
Residential [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	27,985		3,215
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	27,985		3,215
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	41		27
Card [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	10,694		11,900
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	10,185		11,362
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	1,556		1,825
MUAH [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	13,958		18,766
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	13,920		18,656
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	3,113		4,572
Krungsri [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	9,130		16,724
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	9,130		16,695
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	1,875		3,815
Other [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[3]	7,121	[1]	5,117
Troubled debt restructurings, Post-modification outstanding recorded investment	[3]	7,109	[1]	¥ 5,117
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	¥ 180
[1]	For the six months ended September 30, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial and Residential segments, reduction in the stated rate was the primary concession type in the Card segment, and some combination thereof were the primary concession type in the MUFG Americas Holdings and Krungsri segments. For the six months ended September 30, 2020, 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 and Other segments 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, Krungsri and Other segments include accrual and nonaccrual loans.

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses (Credit Quality Indicators of Loans by Class) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	¥ 86,622,787
Commercial [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	84,423,185
Commercial [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	1,832,306
Commercial [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	367,296
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	36,972
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	8,255
Commercial [Member] | Loans Acquired with Deteriorated Credit Quality [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	9,739
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	18,978
Commercial [Member] | Domestic [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	51,102,178
Commercial [Member] | Domestic [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	49,695,889
Commercial [Member] | Domestic [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	1,186,044
Commercial [Member] | Domestic [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	220,245
Commercial [Member] | Foreign [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	35,483,637
Commercial [Member] | Foreign [Member] | Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	34,719,041
Commercial [Member] | Foreign [Member] | Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	636,523
Commercial [Member] | Foreign [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	128,073
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	13,318,490
Residential [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	13,256,744
Residential [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	61,746
Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	565,643
Card [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	504,357
Card [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	61,286
MUAH [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	9,655,468
MUAH [Member] | Credit Quality Based on the Number of Delinquencies [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	4,590,805
MUAH [Member] | Credit Quality Based on the Number of Delinquencies [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	15,119
MUAH [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	4,877,863
MUAH [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	87,648
MUAH [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	84,033
Krungsri [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	6,911,590
Krungsri [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	6,241,696
Krungsri [Member] | Under-Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	508,847
Krungsri [Member] | Non-Performing[Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	161,047
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	1,117,893
Other [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	1,086,517
Other [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	¥ 31,376

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses (Credit Quality Indicators of Loans and Year of Origination by Class) (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2020	Mar. 31, 2020
Commercial [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		¥ 21,726,648
Term loans, 2019		13,635,192
Term loans, 2018		10,586,577
Term loans, 2017		6,294,885
Term loans, 2016		5,423,100
Term loans, Prior		8,805,508
Revolving loans amortized cost basis		19,434,719
Revolving loans converted to term loans amortized		14,706
Total	[1]	85,921,335
Commercial [Member] | Domestic [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		17,012,671
Term loans, 2019		8,041,145
Term loans, 2018		6,880,626
Term loans, 2017		4,386,030
Term loans, 2016		4,136,969
Term loans, Prior		6,499,262
Revolving loans amortized cost basis		7,591,943
Total	[1]	54,548,646
Commercial [Member] | Domestic [Member] | Normal [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		16,731,403
Term loans, 2019		7,793,705
Term loans, 2018		6,708,236
Term loans, 2017		4,212,921
Term loans, 2016		4,037,026
Term loans, Prior		6,019,442
Revolving loans amortized cost basis		7,294,686
Total	[1]	52,797,419
Commercial [Member] | Domestic [Member] | Close Watch [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		266,470
Term loans, 2019		231,540
Term loans, 2018		155,590
Term loans, 2017		158,486
Term loans, 2016		75,883
Term loans, Prior		347,677
Revolving loans amortized cost basis		273,753
Total	[1]	1,509,399
Commercial [Member] | Domestic [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		14,798
Term loans, 2019		15,900
Term loans, 2018		16,800
Term loans, 2017		14,623
Term loans, 2016		24,060
Term loans, Prior		132,143
Revolving loans amortized cost basis		23,504
Total	[1]	241,828
Commercial [Member] | Foreign [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		4,713,977
Term loans, 2019		5,594,047
Term loans, 2018		3,705,951
Term loans, 2017		1,908,855
Term loans, 2016		1,286,131
Term loans, Prior		2,306,246
Revolving loans amortized cost basis		11,842,776
Revolving loans converted to term loans amortized		14,706
Total	[1]	31,372,689
Commercial [Member] | Foreign [Member] | Normal [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		4,592,892
Term loans, 2019		5,467,471
Term loans, 2018		3,572,056
Term loans, 2017		1,811,264
Term loans, 2016		1,223,744
Term loans, Prior		2,138,758
Revolving loans amortized cost basis		11,664,163
Revolving loans converted to term loans amortized		14,706
Total	[1]	30,485,054
Commercial [Member] | Foreign [Member] | Close Watch [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		115,006
Term loans, 2019		74,537
Term loans, 2018		106,742
Term loans, 2017		91,792
Term loans, 2016		60,835
Term loans, Prior		90,305
Revolving loans amortized cost basis		165,238
Total	[1]	704,455
Commercial [Member] | Foreign [Member] | Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		6,079
Term loans, 2019		52,039
Term loans, 2018		27,153
Term loans, 2017		5,799
Term loans, 2016		1,552
Term loans, Prior		77,183
Revolving loans amortized cost basis		13,375
Total	[1]	183,180
Residential [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		257,477
Term loans, 2019		748,682
Term loans, 2018		779,669
Term loans, 2017		875,938
Term loans, 2016		1,312,073
Term loans, Prior		9,083,685
Revolving loans amortized cost basis		35,158
Revolving loans converted to term loans amortized		8
Total	[1]	13,092,690
Residential [Member] | Accrual [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		257,309
Term loans, 2019		748,210
Term loans, 2018		779,153
Term loans, 2017		875,057
Term loans, 2016		1,310,291
Term loans, Prior		9,019,418
Revolving loans amortized cost basis		32,916
Total	[1]	13,022,354
Residential [Member] | Nonaccrual [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		168
Term loans, 2019		472
Term loans, 2018		516
Term loans, 2017		881
Term loans, 2016		1,782
Term loans, Prior		64,267
Revolving loans amortized cost basis		2,242
Revolving loans converted to term loans amortized		8
Total	[1]	70,336
Card [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		615
Term loans, 2019		1,350
Term loans, 2018		2,226
Term loans, 2017		651
Term loans, 2016		177
Term loans, Prior		7,807
Revolving loans amortized cost basis		447,708
Revolving loans converted to term loans amortized		59,329
Total	[1]	519,863
Card [Member] | Accrual [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		559
Term loans, 2019		1,183
Term loans, 2018		1,890
Term loans, 2017		330
Term loans, 2016		69
Term loans, Prior		6,623
Revolving loans amortized cost basis		432,578
Revolving loans converted to term loans amortized		14,619
Total	[1]	457,851
Card [Member] | Nonaccrual [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		56
Term loans, 2019		167
Term loans, 2018		336
Term loans, 2017		321
Term loans, 2016		108
Term loans, Prior		1,184
Revolving loans amortized cost basis		15,130
Revolving loans converted to term loans amortized		44,710
Total	[1]	62,012
MUAH [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
FDIC covered loans acquired with deteriorated credit quality and small business loans which are not individually rated			¥ 365
MUAH [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		812,392
Term loans, 2019		1,640,547
Term loans, 2018		1,141,188
Term loans, 2017		1,157,236
Term loans, 2016		989,283
Term loans, Prior		1,634,056
Revolving loans amortized cost basis		1,947,184
Total	[1]	9,321,886
MUAH [Member] | Accrual [Member] | Credit Quality Based on the Number of Delinquencies [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020	[2]	224,531
Term loans, 2019	[2]	815,376
Term loans, 2018	[2]	480,089
Term loans, 2017	[2]	771,203
Term loans, 2016	[2]	692,337
Term loans, Prior	[2]	854,594
Revolving loans amortized cost basis	[2]	155,253
Total	[1],[2]	3,993,383
MUAH [Member] | Nonaccrual [Member] | Credit Quality Based on the Number of Delinquencies [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2019	[2]	323
Term loans, 2018	[2]	539
Term loans, 2017	[2]	862
Term loans, 2016	[2]	862
Term loans, Prior	[2]	19,285
Revolving loans amortized cost basis	[2]	431
Total	[1],[2]	22,302
MUAH [Member] | Pass [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020	[2]	578,811
Term loans, 2019	[2]	774,425
Term loans, 2018	[2]	577,062
Term loans, 2017	[2]	367,717
Term loans, 2016	[2]	281,755
Term loans, Prior	[2]	663,880
Revolving loans amortized cost basis	[2]	1,652,947
Total	[1],[2]	4,896,597
MUAH [Member] | Special Mention [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020	[2]	3,663
Term loans, 2019	[2]	44,066
Term loans, 2018	[2]	69,492
Term loans, 2017	[2]	11,313
Term loans, 2016	[2]	13,683
Term loans, Prior	[2]	45,790
Revolving loans amortized cost basis	[2]	73,155
Total	[1],[2]	261,162
MUAH [Member] | Classified [Member] | Credit Quality Based on Internal Credit Ratings [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020	[2]	5,387
Term loans, 2019	[2]	6,357
Term loans, 2018	[2]	14,006
Term loans, 2017	[2]	6,141
Term loans, 2016	[2]	646
Term loans, Prior	[2]	50,507
Revolving loans amortized cost basis	[2]	65,398
Total	[1],[2]	148,442
Krungsri [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		773,460
Term loans, 2019		1,369,075
Term loans, 2018		1,112,319
Term loans, 2017		617,690
Term loans, 2016		334,566
Term loans, Prior		509,080
Revolving loans amortized cost basis		2,101,674
Revolving loans converted to term loans amortized		11,964
Total	[1]	6,829,828
Krungsri [Member] | Performing Financial Instruments [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		751,398
Term loans, 2019		1,261,184
Term loans, 2018		972,167
Term loans, 2017		528,286
Term loans, 2016		283,029
Term loans, Prior		407,251
Revolving loans amortized cost basis		1,932,692
Total	[1]	6,136,007
Krungsri [Member] | Under Performing [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		19,249
Term loans, 2019		81,332
Term loans, 2018		108,811
Term loans, 2017		71,709
Term loans, 2016		37,575
Term loans, Prior		61,834
Revolving loans amortized cost basis		141,072
Total	[1]	521,582
Krungsri [Member] | Nonperforming Financial Instruments [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		2,813
Term loans, 2019		26,559
Term loans, 2018		31,341
Term loans, 2017		17,695
Term loans, 2016		13,962
Term loans, Prior		39,995
Revolving loans amortized cost basis		27,910
Revolving loans converted to term loans amortized		11,964
Total	[1]	172,239
Other [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		204,235
Term loans, 2019		267,571
Term loans, 2018		142,773
Term loans, 2017		57,223
Term loans, 2016		17,434
Term loans, Prior		12,055
Revolving loans amortized cost basis		365,843
Total	[1]	1,067,134
Other [Member] | Accrual [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		203,021
Term loans, 2019		256,046
Term loans, 2018		132,678
Term loans, 2017		53,381
Term loans, 2016		16,357
Term loans, Prior		11,201
Revolving loans amortized cost basis		350,986
Total	[1]	1,023,670
Other [Member] | Nonaccrual [Member] | Excluding Loans Held For Sale And Covered Loans [Member]
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Term loans, 2020		1,214
Term loans, 2019		11,525
Term loans, 2018		10,095
Term loans, 2017		3,842
Term loans, 2016		1,077
Term loans, Prior		854
Revolving loans amortized cost basis		14,857
Total	[1]	¥ 43,464
[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 Federal Deposit Insurance Corporation (“FDIC”) covered loans which are not individually rated totaling ¥365 million and nil at March 31, 2020 and September 30, 2020, 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 Credi_9

Loans and Allowance for Credit Losses (Ages of Past Due Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2020	Mar. 31, 2020
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		¥ 693,383	¥ 553,956
Loans, current		116,059,353	117,571,069
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	116,752,736	118,125,025
Loans, greater than 90 days past due and accruing		26,424	13,273
1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		381,001	290,028
Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		312,382	263,928
Commercial [Member] | Domestic [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		39,533	36,186
Loans, current		54,509,113	51,065,992
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	54,548,646	51,102,178
Loans, greater than 90 days past due and accruing		5,211	4,720
Commercial [Member] | Domestic [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		15,794	9,215
Commercial [Member] | Domestic [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		23,739	26,971
Commercial [Member] | Foreign [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		52,002	33,475
Loans, current		31,320,687	35,450,162
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	31,372,689	35,483,637
Loans, greater than 90 days past due and accruing		331	164
Commercial [Member] | Foreign [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		16,084	9,927
Commercial [Member] | Foreign [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		35,918	23,548
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		78,971	63,847
Loans, current		13,013,719	13,248,278
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	13,092,690	13,312,125
Loans, greater than 90 days past due and accruing		13,015	6,288
Residential [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		45,852	48,404
Residential [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		33,119	15,443
Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		42,167	44,732
Loans, current		477,696	518,008
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	519,863	562,740
Card [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		12,262	14,735
Card [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		29,905	29,997
MUAH [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		86,142	45,487
Loans, current		9,235,744	9,603,339
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	9,321,886	9,648,826
Loans, greater than 90 days past due and accruing		7,867	2,101
MUAH [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		65,796	31,052
MUAH [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		20,346	14,435
Krungsri [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		329,391	289,439
Loans, current		6,500,437	6,616,104
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	6,829,828	6,905,543
Krungsri [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		198,923	160,253
Krungsri [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		130,468	129,186
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		65,177	40,790
Loans, current		1,001,957	1,069,186
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	1,067,134	1,109,976
Other [Member] | 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		26,290	16,442
Other [Member] | Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		¥ 38,887	¥ 24,348
[1]	At March 31, 2020, 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. At September 30, 2020, 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_10

Loans and Allowance for Credit Losses (Changes in Allowance for Credit Losses by Portfolio Segment) (Detail) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020		Sep. 30, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		¥ 809,540	[1]	¥ 658,184
Provision for (reversal of) credit losses		209,806		102,121
Charge-offs		135,190		102,570
Recoveries collected		19,537		33,014
Net charge-offs		115,653		69,556
Other	[2]	(18,862)		(76)
Balance at end of period		1,208,535	[1]	690,673
Effect of adopting new guidance [Member] | Measurement of credit losses on financial instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	[3]	323,704
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		482,275		389,615
Provision for (reversal of) credit losses		37,154		28,388
Charge-offs		34,833		29,033
Recoveries collected		3,362		15,612
Net charge-offs		31,471		13,421
Other	[2]	(3,968)		(3,410)
Balance at end of period		567,818		401,172
Commercial [Member] | Effect of adopting new guidance [Member] | Measurement of credit losses on financial instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	[3]	83,828
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		34,746		38,626
Provision for (reversal of) credit losses		(947)		130
Charge-offs		997		2,093
Recoveries collected		7		355
Net charge-offs		990		1,738
Other	[2]	0
Balance at end of period		82,303		37,018
Residential [Member] | Effect of adopting new guidance [Member] | Measurement of credit losses on financial instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	[3]	49,494
Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		35,180		32,550
Provision for (reversal of) credit losses		8,822		14,456
Charge-offs		11,230		12,715
Recoveries collected		486		721
Net charge-offs		10,744		11,994
Balance at end of period		47,520		35,012
Card [Member] | Effect of adopting new guidance [Member] | Measurement of credit losses on financial instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	[3]	14,262
MUAH [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		58,995		52,581
Provision for (reversal of) credit losses		89,812		17,950
Charge-offs		17,453		16,266
Recoveries collected		1,749		2,791
Net charge-offs		15,704		13,475
Other	[2]	(1,757)		(1,613)
Balance at end of period		156,383		55,443
MUAH [Member] | Effect of adopting new guidance [Member] | Measurement of credit losses on financial instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	[3]	25,037
Krungsri [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		169,626		144,812
Provision for (reversal of) credit losses		47,529		24,902
Charge-offs		44,882		36,240
Recoveries collected		11,405		11,115
Net charge-offs		33,477		25,125
Other	[2]	(10,860)		3,568
Balance at end of period		291,151		148,157
Krungsri [Member] | Effect of adopting new guidance [Member] | Measurement of credit losses on financial instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	[3]	118,333
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		28,718
Provision for (reversal of) credit losses		27,436		16,295
Charge-offs		25,795		6,223
Recoveries collected		2,528		2,420
Net charge-offs		23,267		3,803
Other	[2]	(2,277)		1,379
Balance at end of period		63,360		¥ 13,871
Other [Member] | Effect of adopting new guidance [Member] | Measurement of credit losses on financial instruments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	[3]	¥ 32,750
[1]	New guidance on measurement of credit losses on financial instruments requires allowance for credit losses to be measured by current expected credit losses model from April 1, 2020. For additional information, refer to Note 1.
[2]	Other is principally comprised of gains or losses from foreign exchange translation.
[3]	See Note 1 for more information.

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses (Allowance for Credit Losses and Recorded Investment in Loans by Portfolio Segment) (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2020		Mar. 31, 2020		Sep. 30, 2019	Mar. 31, 2019
Allowance for credit losses:
Individually evaluated for impairment				¥ 437,777
Collectively evaluated for impairment				359,579
Loans acquired with deteriorated credit quality	[1]			12,184
Total		¥ 1,208,535	[2]	809,540	[2]	¥ 690,673	¥ 658,184
Loans:
Individually evaluated for impairment				1,286,918
Collectively evaluated for impairment				116,838,107
Loans acquired with deteriorated credit quality	[1]			67,211
Total	[3]			118,192,236
Commercial [Member]
Allowance for credit losses:
Individually evaluated for impairment				364,079
Collectively evaluated for impairment				108,100
Loans acquired with deteriorated credit quality	[1]			10,096
Total		567,818		482,275		401,172	389,615
Loans:
Individually evaluated for impairment				944,988
Collectively evaluated for impairment				85,640,827
Loans acquired with deteriorated credit quality	[1]			36,972
Total	[3]			86,622,787
Residential [Member]
Allowance for credit losses:
Individually evaluated for impairment				12,651
Collectively evaluated for impairment				21,130
Loans acquired with deteriorated credit quality	[1]			965
Total		82,303		34,746		37,018	38,626
Loans:
Individually evaluated for impairment				92,448
Collectively evaluated for impairment				13,219,677
Loans acquired with deteriorated credit quality	[1]			6,365
Total	[3]			13,318,490
Card [Member]
Allowance for credit losses:
Individually evaluated for impairment				19,799
Collectively evaluated for impairment				15,369
Loans acquired with deteriorated credit quality	[1]			12
Total		47,520		35,180		35,012	32,550
Loans:
Individually evaluated for impairment				65,292
Collectively evaluated for impairment				497,448
Loans acquired with deteriorated credit quality	[1]			2,903
Total	[3]			565,643
MUAH [Member]
Allowance for credit losses:
Individually evaluated for impairment				5,977
Collectively evaluated for impairment				53,013
Loans acquired with deteriorated credit quality	[1]			5
Total		156,383		58,995		55,443	52,581
Loans:
Individually evaluated for impairment				67,719
Collectively evaluated for impairment				9,581,107
Loans acquired with deteriorated credit quality	[1]			7,007
Total	[3]			9,655,833
Krungsri [Member]
Allowance for credit losses:
Individually evaluated for impairment				30,198
Collectively evaluated for impairment				139,401
Loans acquired with deteriorated credit quality	[1]			27
Total		291,151		169,626		148,157	¥ 144,812
Loans:
Individually evaluated for impairment				98,959
Collectively evaluated for impairment				6,806,584
Loans acquired with deteriorated credit quality	[1]			6,047
Total	[3]			6,911,590
Other [Member]
Allowance for credit losses:
Individually evaluated for impairment				5,073
Collectively evaluated for impairment				22,566
Loans acquired with deteriorated credit quality	[1]			1,079
Total		¥ 63,360		28,718		¥ 13,871
Loans:
Individually evaluated for impairment				17,512
Collectively evaluated for impairment				1,092,464
Loans acquired with deteriorated credit quality	[1]			7,917
Total	[3]			¥ 1,117,893
[1]	Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment.
[2]	New guidance on measurement of credit losses on financial instruments requires allowance for credit losses to be measured by current expected credit losses model from April 1, 2020. For additional information, refer to Note 1.
[3]	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.

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Narrative) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment losses on goodwill	¥ 106,479	¥ 241,356

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Movement in Carrying Amount of Goodwill) (Detail) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, at beginning of period	[1]	¥ 1,093,554	¥ 626,009
Accumulated impairment losses, at beginning of period	[1]	(575,928)	(192,118)
Goodwill, Net at beginning of period		517,626	433,891
Goodwill acquired during the six months	[2]	3,990	446,643
Impairment loss		(106,479)	(241,356)
Foreign currency translation adjustments and other		(10,128)	(22,558)
Goodwill, at end of period		1,087,416	1,050,094
Accumulated impairment losses, at end of period		(682,407)	(433,474)
Goodwill, Net at end of period		405,009	¥ 616,620
Goodwill, Fully impaired before April 1, 2019		¥ 1,900,019
[1]	Goodwill originally recognized of ¥1,900,019 million, which has been fully impaired before April 1, 2019, is not included in the table above.
[2]	See Note 2 for the goodwill acquired in connection with acquisitions.

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Carrying Amount of Other Intangible Assets by Major Class) (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2020	Mar. 31, 2020
Intangible assets subject to amortization:
Net carrying amount		¥ 1,173,610	¥ 1,201,966
Intangible assets not subject to amortization:
Total intangible assets, Net carrying amount		1,199,240	1,239,526
Mortgage Servicing Rights [Member]
Intangible assets not subject to amortization:
Net carrying amount, Other		15,274	29,641
Software [Member]
Intangible assets subject to amortization:
Net carrying amount	[1]	764,940	755,638
Customer Relationships [Member]
Intangible assets subject to amortization:
Net carrying amount		276,802	303,250
Core Deposit Intangibles [Member]
Intangible assets subject to amortization:
Net carrying amount		67,642	74,780
Trade Names [Member]
Intangible assets subject to amortization:
Net carrying amount		53,311	56,693
Other [Member]
Intangible assets subject to amortization:
Net carrying amount		10,915	11,605
Intangible assets not subject to amortization:
Net carrying amount, Other	[2]	¥ 25,630	¥ 37,560
[1]	As a result of adopting new guidance, costs for implementation activities in certain hosting arrangements are capitalized as software.
[2]	Intangible assets not subject to amortization includes mortgage servicing rights accounted for at fair value of ¥29,641 million and ¥15,274 million at March 31, 2020 and September 30, 2020, respectively.

Lease Transactions (Profit or L

Lease Transactions (Profit or Loss of Lease Transactions as a Lessor) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Financing leases:
Finance income on net investment	¥ 64,748	¥ 59,058
Operating leases:
Lease income	2,025	1,917
Total	¥ 66,773	¥ 60,975

Pledged Assets and Collateral (

Pledged Assets and Collateral (Narrative) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2020	Mar. 31, 2020
Financial Instruments Pledged as Collateral [Abstract]
Investment securities pledged for acting as a collection agent of public funds	¥ 21,322,674
Cash collateral pledged for derivative transactions included in Other assets	1,484,866	¥ 1,696,108
Cash collateral received for derivative transactions included in Other liabilities	¥ 1,108,155	¥ 1,125,305

Pledged Assets and Collateral_3

Pledged Assets and Collateral (Assets Mortgaged, Pledged, or Otherwise Subject to Lien) (Detail) ¥ in Millions	Sep. 30, 2020JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 42,253,642
Trading Account Securities [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	9,578,255
Investment Securities [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	18,831,013
Loans [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	13,827,599
Other [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 16,775

Pledged Assets and Collateral_4

Pledged Assets and Collateral (Pledged Assets Classified by Type of Liabilities) (Detail) ¥ in Millions	Sep. 30, 2020JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 42,253,642
Deposits [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	215,110
Payables under Repurchase Agreements and Securities Lending Transactions [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	14,638,080
Other Short-term Borrowings and Long-term Debt [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	27,374,865
Other [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 25,587

Severance Indemnities and Pen_3

Severance Indemnities and Pension Plans (Components of Net Periodic Cost of Pension Benefits and Other Benefits) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Domestic, Japan [Member] | Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	¥ 23,695	¥ 24,585
Interest cost on projected benefit obligation	5,596	5,545
Expected return on plan assets	(35,577)	(37,585)
Amortization of net actuarial loss	8,547	2,602
Amortization of prior service cost	(602)	(602)
Loss (gain) on settlements and curtailment	(1,084)	(2,347)
Net periodic benefit cost (income)	575	(7,802)
Foreign Offices and Subsidiaries [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	7,354	6,550
Interest cost on projected benefit obligation	7,255	8,667
Expected return on plan assets	(15,785)	(15,847)
Amortization of net actuarial loss	8,158	4,915
Amortization of prior service cost	(1,309)	(1,332)
Loss (gain) on settlements and curtailment		185
Net periodic benefit cost (income)	5,673	3,138
Foreign Offices and Subsidiaries [Member] | Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	117	175
Interest cost on projected benefit obligation	402	575
Expected return on plan assets	(1,072)	(949)
Amortization of net actuarial loss	125	556
Amortization of prior service cost	(226)	(948)
Net periodic benefit cost (income)	¥ (654)	¥ (591)

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		Sep. 30, 2020	Mar. 31, 2020
Offsetting [Abstract]
Derivative assets, Gross amounts of recognized assets/liabilities		¥ 13,673,000	¥ 14,958,000
Derivative assets, Gross amounts offset in the condensed consolidated balance sheet
Derivative assets, Net amounts presented in the condensed consolidated balance sheet	[1],[2],[3]	13,673,000	14,958,000
Derivative assets, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments		(10,188,000)	(11,282,000)
Derivative assets, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged		(741,000)	(874,000)
Derivative assets, Net amounts		2,744,000	2,802,000
Receivables under resale agreements, Gross amounts of recognized assets/liabilities		15,706,000	25,884,000
Receivables under resale agreements, Gross amounts offset in the condensed consolidated balance sheet		(1,655,000)	(1,888,000)
Receivables under resale agreements, Net amounts presented in the condensed consolidated balance sheet		14,051,000	23,996,000
Receivables under resale agreements, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments		(13,308,000)	(23,195,000)
Receivables under resale agreements, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged		(34,000)	(21,000)
Receivables under resale agreements, Net amounts		709,000	780,000
Receivables under securities borrowing transactions, Gross amounts of recognized assets/liabilities		3,199,000	3,444,000
Receivables under securities borrowing transactions, Gross amounts offset in the condensed consolidated balance sheet
Receivables under securities borrowing transactions, Net amounts presented in the condensed consolidated balance sheet		3,199,178	3,443,959
Receivables under securities borrowing transactions, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments		(3,101,000)	(3,336,000)
Receivables under securities borrowing transactions, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged
Receivables under securities borrowing transactions, Net amounts		98,000	108,000
Financial assets, Gross amounts of recognized assets/liabilities, Total		32,578,000	44,286,000
Financial assets, Gross amounts offset in the condensed consolidated balance sheet, Total		(1,655,000)	(1,888,000)
Financial assets, Net amounts presented in the condensed consolidated balance sheet, Total		30,923,000	42,398,000
Financial assets, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments, Total		(26,597,000)	(37,813,000)
Financial assets, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged, Total		(775,000)	(895,000)
Financial assets, Net amounts, Total		3,551,000	3,690,000
Derivative liabilities, Gross amounts of recognized assets/liabilities		12,636,000	14,034,000
Derivative liabilities, Gross amounts offset in the condensed consolidated balance sheet
Derivative liabilities, Net amounts presented in the condensed consolidated balance sheet	[1],[2],[3]	12,636,000	14,034,000
Derivative liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments		(10,204,000)	(11,296,000)
Derivative liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged		(1,129,000)	(1,140,000)
Derivative liabilities, Net amounts		1,303,000	1,598,000
Payables under repurchase agreements, Gross amounts of recognized assets/liabilities		28,081,000	33,733,000
Payables under repurchase agreements, Gross amounts offset in the condensed consolidated balance sheet		(1,633,000)	(1,883,000)
Payables under repurchase agreements, Net amounts presented in the condensed consolidated balance sheet		26,448,000	31,850,000
Payables under repurchase agreements, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments		(25,935,000)	(31,569,000)
Payables under repurchase agreements, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged		(42,000)	(34,000)
Payables under repurchase agreements, Net amounts		471,000	247,000
Payables under securities lending transactions, Gross amounts of recognized assets/liabilities		842,000	1,017,000
Payables under securities lending transactions, Gross amounts offset in the condensed consolidated balance sheet
Payables under securities lending transactions, Net amounts presented in the condensed consolidated balance sheet		841,747	1,016,874
Payables under securities lending transactions, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments		(809,000)	(986,000)
Payables under securities lending transactions, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged		(2,000)
Payables under securities lending transactions, Net amounts		31,000	31,000
Obligations to return securities received as collateral, Gross amounts of recognized assets/liabilities		5,146,000	4,806,000
Obligations to return securities received as collateral, Gross amounts offset in the condensed consolidated balance sheet
Obligations to return securities received as collateral, Net amounts presented in the condensed consolidated balance sheet		5,146,000	4,806,000
Obligations to return securities received as collateral, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments		(1,339,000)	(1,966,000)
Obligations to return securities received as collateral, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged
Obligations to return securities received as collateral, Net amounts		3,807,000	2,840,000
Financial liabilities, Gross amounts of recognized assets/liabilities, Total		46,705,000	53,590,000
Financial liabilities, Gross amounts offset in the condensed consolidated balance sheet, Total		(1,633,000)	(1,883,000)
Financial liabilities, Net amounts presented in the condensed consolidated balance sheet, Total		45,072,000	51,707,000
Financial liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments, Total		(38,287,000)	(45,817,000)
Financial liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged, Total		(1,173,000)	(1,174,000)
Financial liabilities, Net amounts, Total		¥ 5,612,000	¥ 4,716,000
[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.
[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 Sec_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	Sep. 30, 2020	Mar. 31, 2020
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 28,081	¥ 33,733
Payables under securities lending transactions	842	1,017
Obligations to return securities received as collateral	5,146	4,806
Total	34,069	39,556
Overnight and Open [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	11,591	9,685
Payables under securities lending transactions	819	934
Obligations to return securities received as collateral	4,505	3,856
Total	16,915	14,475
30 Days or Less [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	12,592	16,608
Payables under securities lending transactions		64
Obligations to return securities received as collateral	239	599
Total	12,831	17,271
31-90 Days [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	1,563	4,496
Payables under securities lending transactions	23	19
Obligations to return securities received as collateral	258	276
Total	1,844	4,791
Over 90 Days [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	2,335	2,944
Obligations to return securities received as collateral	144	75
Total	¥ 2,479	¥ 3,019

Repurchase Agreements and Sec_4

Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings (Secured Borrowing by the Class of Collateral Pledged) (Detail) - JPY (¥) ¥ in Billions	Sep. 30, 2020	Mar. 31, 2020
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 28,081	¥ 33,733
Payables under securities lending transactions	842	1,017
Obligations to return securities received as collateral	5,146	4,806
Total	34,069	39,556
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	11,030	10,687
Payables under securities lending transactions	149	38
Obligations to return securities received as collateral	2,769	2,241
Total	13,948	12,966
Foreign Government and Official Institution Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	12,057	17,326
Payables under securities lending transactions	52	57
Obligations to return securities received as collateral	716	873
Total	12,825	18,256
Corporate Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	732	784
Payables under securities lending transactions	16
Obligations to return securities received as collateral	193	183
Total	941	967
Residential Mortgage-backed Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	3,707	4,248
Obligations to return securities received as collateral		10
Total	3,707	4,258
Other Debt Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	233	157
Obligations to return securities received as collateral		2
Total	233	159
Marketable Equity Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	300	506
Payables under securities lending transactions	616	914
Obligations to return securities received as collateral	1,462	1,497
Total	2,378	2,917
Other [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	22	25
Payables under securities lending transactions	9	8
Obligations to return securities received as collateral	6
Total	¥ 37	¥ 33

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	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gains (losses) on investment securities, Balance at beginning of period	¥ (344,785)	¥ (369,369)
Net unrealized gains (losses) on investment securities, Net change during the period	54,116	82,908
Effect of adopting new guidance on measurement of credit losses on financial instruments	34
Net unrealized gains (losses) on investment securities, Balance at end of period	(290,635)	(286,461)
Net debt valuation adjustments, Balance at beginning of period	45,502	(8,670)
Net debt valuation adjustments, Net change during the period	(59,324)	850
Net debt valuation adjustments, Balance at end of period	(13,822)	(7,820)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Balance at beginning of period	(13,343)	(24,140)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Net change during the period	38,130	9,167
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Balance at end of period	24,787	(14,973)
Defined benefit plans, Balance at beginning of period	(337,918)	(208,273)
Defined benefit plans, Net change during the period	27,625	(7,750)
Defined benefit plans, Balance at end of period	(310,293)	(216,023)
Foreign currency translation adjustments, Balance at beginning of period	230,127	326,183
Foreign currency translation adjustments, Net change during the period	(184,264)	(205,047)
Foreign currency translation adjustments, Balance at end of period	45,863	121,136
Accumulated other comprehensive income (loss), net of taxes: Balance at end of period	¥ (544,100)	¥ (404,141)	¥ (420,417)

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	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net unrealized gains (losses) on investment securities, Before tax:
Net unrealized gains on investment securities	¥ 83,444	¥ 157,642
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests	(1,055)	(45,354)
Net change	82,389	112,288
Net unrealized gains (losses) on investment securities, Tax (expense) or benefit:
Net unrealized gains on investment securities	(21,968)	(34,202)
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests	(238)	13,370
Net change	(22,206)	(20,832)
Net unrealized gains (losses) on investment securities, Net of tax:
Net unrealized gains on investment securities	61,476	123,440
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests	(1,293)	(31,984)
Net change	60,183	91,456
Net unrealized gains on investment securities attributable to noncontrolling interests	6,067	8,548
Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group	54,116	82,908
Net debt valuation adjustments, Before tax:
Net debt valuation adjustments	(85,613)	1,067
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	108	159
Net change	(85,505)	1,226
Net debt valuation adjustments, Tax (expense) or benefit:
Net debt valuation adjustments	26,214	(327)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	(33)	(49)
Net change	26,181	(376)
Net debt valuation adjustments, Net of tax:
Net debt valuation adjustments	(59,399)	740
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	75	110
Net change	(59,324)	850
Net debt valuation adjustments attributable to noncontrolling interests
Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group	(59,324)	850
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Before tax:
Net unrealized gains on derivatives qualifying for cash flow hedges	51,002	6,748
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	1,388	5,843
Net change	52,390	12,591
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Tax (expense) or benefit:
Net unrealized gains on derivatives qualifying for cash flow hedges	(14,013)	(1,934)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	(371)	(1,527)
Net change	(14,384)	(3,461)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Net of tax:
Net unrealized gains on derivatives qualifying for cash flow hedges	36,989	4,814
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	1,017	4,316
Net change	38,006	9,130
Net unrealized losses on derivatives qualifying for cash flow hedges attributable to noncontrolling interests	(124)	(37)
Net unrealized gains on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group	38,130	9,167
Defined benefit plans, Before tax:
Defined benefit plans	26,092	(13,959)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	13,617	2,169
Net change	39,709	(11,790)
Defined benefit plans, Tax (expense) or benefit:
Defined benefit plans	(8,070)	3,917
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	(3,871)	(500)
Net change	(11,941)	3,417
Defined benefit plans, Net of tax:
Defined benefit plans	18,022	(10,042)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests	9,746	1,669
Net change	27,768	(8,373)
Defined benefit plans attributable to noncontrolling interests	143	(623)
Defined benefit plans attributable to Mitsubishi UFJ Financial Group	27,625	(7,750)
Foreign currency translation adjustments, Before tax:
Foreign currency translation adjustments	(214,725)	(224,257)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests	797	(2,208)
Net change	(213,928)	(226,465)
Foreign currency translation adjustments, Tax (expense) or benefit:
Foreign currency translation adjustments	19,531	24,752
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests	(245)	1,095
Net change	19,286	25,847
Foreign currency translation adjustments, Net of tax:
Foreign currency translation adjustments	(195,194)	(199,505)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests	552	(1,113)
Net change	(194,642)	(200,618)
Foreign currency translation adjustments attributable to noncontrolling interests	(10,378)	4,429
Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group	(184,264)	(205,047)
Other comprehensive loss attributable to Mitsubishi UFJ Financial Group	¥ (123,717)	¥ (119,872)

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) (Reclassification of Significant Items out of Accumulated OCI) (Detail) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains—net		¥ (683,661)	¥ (11,654)
Equity in earnings of equity method investees—net		(140,420)	(165,487)
Interest income on Loans, including fees		(1,034,727)	(1,322,361)
Other non-interest income		(19,658)	(73,729)
Other non-interest expenses		(177,457)	(158,758)
Total before tax		(1,146,114)	(838,492)
Income tax expense		366,109	221,171
Net of tax		(780,005)	(617,321)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax		14,855	(39,391)
Income tax expense		(4,758)	12,389
Net of tax		10,097	(27,002)
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		(50)	196
Total before tax		(1,055)	(45,354)
Income tax expense		(238)	13,370
Net of tax		(1,293)	(31,984)
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—net		(1,005)	(45,550)
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		108	159
Total before tax		108	159
Income tax expense		(33)	(49)
Net of tax		75	110
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		0	2
Total before tax		1,388	5,843
Income tax expense		(371)	(1,527)
Net of tax		1,017	4,316
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		1,236	4,408
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member] | Foreign Exchange Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense on Long-term debt or Foreign exchange losses—net		152	1,433
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		13,617	2,169
Income tax expense		(3,871)	(500)
Net of tax		9,746	1,669
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	[1]	16,830	8,073
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	[1]	(2,137)	(2,882)
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	[1]	(1,076)	(3,022)
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		715	(4,976)
Other non-interest expenses		82	2,768
Total before tax		797	(2,208)
Income tax expense		(245)	1,095
Net of tax		¥ 552	¥ (1,113)
[1]	These Accumulated OCI components are components of net periodic benefit cost. See Note 8 for more information.

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Detail) - JPY (¥) ¥ in Billions		6 Months Ended		12 Months Ended
		Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Cash Flow Hedge:
Derivative, Notional Amount	[1]	¥ 1,689,200		¥ 1,803,700
Credit Derivatives:
Carrying value of credit protection, offsetting with purchased protection with identical underlying referenced entities, in approximate		42		65
Notional amounts of credit protection, offsetting with purchased protection with identical underlying referenced entities, in approximate		4,489		3,544
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		700		600
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a liability position, posted collateral, in approximate		210		152
Additional collateral amount which could be requested if the MUFG Group's debt falls below investment grade		59		58
Early termination amount which could be requested if the MUFG Group's debt falls below investment grade		41		80
Interest Rate Contracts [Member]
Cash Flow Hedge:
Derivative, Notional Amount	[1]	¥ 1,455,900		¥ 1,553,500
MUAH [Member]
Cash Flow Hedge:
Approximate income expected to be reclassified to net interest income during the twelve months ending June 30, 2021			¥ 10.1
MUAH [Member] | Cash Flow Hedging [Member] | Weighted Average [Member]
Cash Flow Hedge:
Remaining life of the active cash flow hedges, in years			3 years 2 months 12 days
MUAH [Member] | Cash Flow Hedging [Member] | Interest Rate Contracts [Member] | Interest Rates From Variable Rate Loans [Member]
Cash Flow Hedge:
Derivative, Notional Amount			¥ 1,023.5
MUAH [Member] | Cash Flow Hedging [Member] | Interest Rate Contracts [Member] | Interest Rate On LIBOR indexed short-term borrowings [Member]
Cash Flow Hedge:
Derivative, Notional Amount			¥ 1
[1]	Includes both written and purchased positions.

Derivative Financial Instrume_4

Derivative Financial Instruments (Notional Amounts of Derivative Contracts) (Detail) - JPY (¥) ¥ in Trillions		Sep. 30, 2020	Mar. 31, 2020
Derivative [Line Items]
Notional amounts of derivatives	[1]	¥ 1,689.2	¥ 1,803.7
Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	1,455.9	1,553.5
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	212.4	230.2
Equity Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	7.2	8.1
Commodity Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	0.1	0.1
Credit Derivatives [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	10.3	8.7
Other [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	¥ 3.3	¥ 3.1
[1]	Includes both written and purchased positions.

Derivative Financial Instrume_5

Derivative Financial Instruments (Fair Value Information on Derivative Instruments Recorded on Condensed Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Billions		Sep. 30, 2020	Mar. 31, 2020
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	¥ 13,673	¥ 14,958
Fair value of derivative liabilities	[1],[2],[3]	12,636	14,034
Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	10,477	10,847
Fair value of derivative liabilities	[1],[2],[3]	9,640	10,205
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	2,860	3,734
Fair value of derivative liabilities	[1],[2],[3]	2,757	3,608
Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	210	236
Fair value of derivative liabilities	[1],[2],[3]	223	277
Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	31	26
Fair value of derivative liabilities	[1],[2],[3]	30	26
Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	91	114
Fair value of derivative liabilities	[1],[2],[3]	91	95
Other [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3],[4]	4	1
Fair value of derivative liabilities	[1],[2],[3],[4]	(105)	(177)
Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	13,673	14,958
Fair value of derivative liabilities	[1],[2],[5]	12,633	14,030
Not Designated as Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	10,477	10,847
Fair value of derivative liabilities	[1],[2],[5]	9,640	10,205
Not Designated as Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	2,860	3,734
Fair value of derivative liabilities	[1],[2],[5]	2,754	3,604
Not Designated as Hedging Instruments [Member] | Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	210	236
Fair value of derivative liabilities	[1],[2],[5]	223	277
Not Designated as Hedging Instruments [Member] | Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	31	26
Fair value of derivative liabilities	[1],[2],[5]	30	26
Not Designated as Hedging Instruments [Member] | Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	91	114
Fair value of derivative liabilities	[1],[2],[5]	91	95
Not Designated as Hedging Instruments [Member] | Other [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[4],[5]	4	1
Fair value of derivative liabilities	[1],[2],[4],[5]	(105)	(177)
Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]	3	4
Designated as Hedging Instruments [Member] | Interest Rate 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] | 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]	3	4
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] | Other [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[4],[6]
Fair value of derivative liabilities	[1],[2],[3],[4]
[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.
[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 mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, 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 acount assets and liabilities except for (6).
[6]	The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by certain subsidiaries. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying condensed 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	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ 90	¥ (207)
Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	136	122
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	74	(185)
Equity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(37)	(58)
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)		(15)
Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	2	(23)
Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(85)	(48)
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)	83	(185)
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)	74	(185)
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] | Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	9
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)	7	(22)
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)	136	122
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)	(37)	(58)
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)		(15)
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)	2	(23)
Trading Account Profits (Losses)—Net [Member] | Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (94)	¥ (48)

Derivative Financial Instrume_7

Derivative Financial Instruments (Protection Sold Through Credit Derivatives) (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2020	Mar. 31, 2020
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		¥ 559,654	¥ 448,290
Maximum potential/Notional amount, Expiring in 1-5 years		3,465,187	2,919,354
Maximum potential/Notional amount, Expiring over 5 years		805,966	563,987
Maximum potential/Notional amount, Total		4,830,807	3,931,631
Credit derivative (asset) liability at fair value	[1]	(44,687)	(68,903)
Protection sold [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		479,978	399,994
Maximum potential/Notional amount, Expiring in 1-5 years		2,596,776	2,411,724
Maximum potential/Notional amount, Expiring over 5 years		735,382	543,721
Maximum potential/Notional amount, Total		3,812,136	3,355,439
Credit derivative (asset) liability at fair value	[1]	(35,854)	(60,515)
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]	360,206	303,870
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	2,216,372	2,125,006
Maximum potential/Notional amount, Expiring over 5 years	[2]	648,184	494,040
Maximum potential/Notional amount, Total	[2]	3,224,762	2,922,916
Credit derivative (asset) liability at fair value	[1],[2]	(47,942)	(63,855)
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		118,924	93,671
Maximum potential/Notional amount, Expiring in 1-5 years		377,967	279,892
Maximum potential/Notional amount, Expiring over 5 years		87,198	49,681
Maximum potential/Notional amount, Total		584,089	423,244
Credit derivative (asset) liability at fair value	[1]	12,209	3,358
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		848	2,453
Maximum potential/Notional amount, Expiring in 1-5 years		2,437	6,826
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total		3,285	9,279
Credit derivative (asset) liability at fair value	[1]	(121)	(18)
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		79,676	48,296
Maximum potential/Notional amount, Expiring in 1-5 years		868,411	507,630
Maximum potential/Notional amount, Expiring over 5 years		70,584	20,266
Maximum potential/Notional amount, Total		1,018,671	576,192
Credit derivative (asset) liability at fair value	[1]	(8,833)	(8,388)
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		11,638
Maximum potential/Notional amount, Expiring in 1-5 years		451,887	127,331
Maximum potential/Notional amount, Expiring over 5 years		47,557
Maximum potential/Notional amount, Total		511,082	127,331
Credit derivative (asset) liability at fair value	[1]	(1,482)	(1,198)
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 1-5 years	[2]	367,247	28,296
Maximum potential/Notional amount, Expiring over 5 years	[2]	47,557
Maximum potential/Notional amount, Total	[2]	414,804	28,296
Credit derivative (asset) liability at fair value	[1],[2]	(33)	(3)
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		11,638
Maximum potential/Notional amount, Expiring in 1-5 years		84,640	99,035
Maximum potential/Notional amount, Total		96,278	99,035
Credit derivative (asset) liability at fair value	[1]	(1,449)	(1,195)
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		68,038	48,296
Maximum potential/Notional amount, Expiring in 1-5 years		416,524	380,299
Maximum potential/Notional amount, Expiring over 5 years		23,027	20,266
Maximum potential/Notional amount, Total		507,589	448,861
Credit derivative (asset) liability at fair value	[1]	(7,351)	(7,190)
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]	36,000	20,000
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	169,791	182,306
Maximum potential/Notional amount, Expiring over 5 years	[2]	6,820	14,950
Maximum potential/Notional amount, Total	[2]	212,611	217,256
Credit derivative (asset) liability at fair value	[1],[2]	(3,265)	(1,820)
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 1-5 years		7,504	7,595
Maximum potential/Notional amount, Total		7,504	7,595
Credit derivative (asset) liability at fair value	[1]	(141)	(165)
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		32,038	28,296
Maximum potential/Notional amount, Expiring in 1-5 years		239,229	190,398
Maximum potential/Notional amount, Expiring over 5 years		16,207	5,316
Maximum potential/Notional amount, Total		287,474	224,010
Credit derivative (asset) liability at fair value	[1]	¥ (3,945)	¥ (5,205)
[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.

Obligations under Guarantees _3

Obligations under Guarantees and Other Off-balance Sheet Instruments (Contractual or Notional Amounts of Guarantees) (Detail) - JPY (¥) ¥ in Billions		Sep. 30, 2020	Mar. 31, 2020
Guarantor Obligations [Line Items]
Contractual or Notional amount		¥ 64,792	¥ 79,222
Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Contractual or Notional amount		3,895	4,098
Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Contractual or Notional amount		2,974	3,058
Derivative Instruments [Member]
Guarantor Obligations [Line Items]
Contractual or Notional amount	[1],[2]	45,827	58,836
Liabilities of Trust Accounts [Member]
Guarantor Obligations [Line Items]
Contractual or Notional amount		12,058	13,142
Other [Member]
Guarantor Obligations [Line Items]
Contractual or Notional amount		¥ 38	¥ 88
[1]	Credit derivatives sold by the MUFG Group are excluded from this presentation.
[2]	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.

Obligations under Guarantees _4

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		Sep. 30, 2020	Mar. 31, 2020
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		¥ 64,792	¥ 79,222
Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,895	4,098
Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		2,974	3,058
Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		6,869	7,156
Normal [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,785	3,984
Normal [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		2,853	2,904
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		6,638	6,888
Close Watch [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	89	93
Close Watch [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	76	96
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]	165	189
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	17	17
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	19	36
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	[1]	36	53
Not Rated [Member] | Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		4	4
Not Rated [Member] | Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		26	22
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		¥ 30	¥ 26
[1]	See Notes of the tables regarding “the maximum potential amount of future payments classified based upon internal credit ratings “in Note 24 to the consolidated financial statements for the fiscal year ended March 31, 2020.

Obligations under Guarantees _5

Obligations under Guarantees and Other Off-balance Sheet Instruments (Contractual Amounts with Regard to Other Off-balance Sheet Instruments) (Detail) - JPY (¥) ¥ in Billions	Sep. 30, 2020	Mar. 31, 2020
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	¥ 84,339	¥ 76,398
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	680	757
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	256	247
Other [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 6	¥ 5

Contingent Liabilities (Narrati

Contingent Liabilities (Narrative) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2020	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Allowance for repayment of excess interest	¥ 28,241	¥ 29,438

Variable Interest Entities (Ass

Variable Interest Entities (Assets and Liabilities of Consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2020	Mar. 31, 2020
Variable Interest Entity [Line Items]
Total assets	¥ 342,530,687	¥ 331,753,283
Consolidated assets, Cash and due from banks	46,982,224	33,283,032
Consolidated assets, Interest-earning deposits in other banks	46,935,862	45,266,680
Consolidated assets, Trading account assets	46,018,006	47,504,058
Consolidated assets, Investment securities	54,674,842	43,751,242
Consolidated assets, Loans	115,539,584	117,377,199
Total liabilities	326,706,148	316,008,767
Consolidated liabilities, Deposits	218,388,871	203,954,528
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total assets	18,013,608	18,847,661
Consolidated assets, Cash and due from banks	1,138	846
Consolidated assets, Interest-earning deposits in other banks	29,356	30,047
Consolidated assets, Trading account assets	847,065	695,069
Consolidated assets, Investment securities	1,573,137	1,804,459
Consolidated assets, Loans	15,356,723	16,072,595
Consolidated assets, All other assets	206,189	244,645
Total liabilities	470,231	598,152
Consolidated liabilities, Other short-term borrowings	30,497	30,831
Consolidated liabilities, Long-term debt	380,941	465,352
Consolidated liabilities, All other liabilities	58,793	101,969
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member]
Variable Interest Entity [Line Items]
Total assets	25,196,401	25,725,510
Consolidated assets, Cash and due from banks	43,392	104,461
Consolidated assets, Interest-earning deposits in other banks	49,956	53,474
Consolidated assets, Trading account assets	854,410	705,661
Consolidated assets, Investment securities	1,999,946	2,094,026
Consolidated assets, Loans	22,021,730	22,502,475
Consolidated assets, All other assets	226,967	265,413
Total liabilities	24,660,010	25,108,870
Consolidated liabilities, Deposits	6,961,743	6,743,261
Consolidated liabilities, Other short-term borrowings	3,686,222	4,415,647
Consolidated liabilities, Long-term debt	12,157,159	11,839,934
Consolidated liabilities, All other liabilities	1,854,886	2,110,028
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Asset-backed Conduits [Member]
Variable Interest Entity [Line Items]
Total assets	5,469,538	6,263,082
Consolidated assets, Cash and due from banks	41,437	102,781
Consolidated assets, Interest-earning deposits in other banks	29,879	31,625
Consolidated assets, Trading account assets	11,056	12,989
Consolidated assets, Investment securities	1,035,425	1,195,283
Consolidated assets, Loans	4,313,554	4,913,939
Consolidated assets, All other assets	38,187	6,465
Total liabilities	5,468,866	6,253,318
Consolidated liabilities, Other short-term borrowings	3,584,976	4,327,685
Consolidated liabilities, Long-term debt	1,456,023	1,478,921
Consolidated liabilities, All other liabilities	427,867	446,712
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Total assets	454,682	493,757
Consolidated assets, Interest-earning deposits in other banks	14,905	16,482
Consolidated assets, Trading account assets	304,249	314,074
Consolidated assets, Investment securities	37,550	34,121
Consolidated assets, All other assets	97,978	129,080
Total liabilities	12,773	15,817
Consolidated liabilities, Long-term debt	5,438	5,546
Consolidated liabilities, All other liabilities	7,335	10,271
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Special Purpose Entities Created for Structured Financing [Member]
Variable Interest Entity [Line Items]
Total assets	178,382	204,047
Consolidated assets, Interest-earning deposits in other banks	1,581	2,658
Consolidated assets, Trading account assets	2,631
Consolidated assets, Loans	121,556	119,348
Consolidated assets, All other assets	52,614	82,041
Total liabilities	96,885	114,357
Consolidated liabilities, Long-term debt	88,959	112,474
Consolidated liabilities, All other liabilities	7,926	1,883
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Repackaged Instruments [Member]
Variable Interest Entity [Line Items]
Total assets	246,388	249,529
Consolidated assets, Cash and due from banks	1,628	1,330
Consolidated assets, Trading account assets	42,725	42,052
Consolidated assets, Investment securities	115,302	118,776
Consolidated assets, Loans	86,474	86,859
Consolidated assets, All other assets	259	512
Total liabilities	247,379	251,056
Consolidated liabilities, Other short-term borrowings	20,836	65,965
Consolidated liabilities, Long-term debt	162,788	163,833
Consolidated liabilities, All other liabilities	63,755	21,258
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Securitization of MUFG Group's Assets [Member]
Variable Interest Entity [Line Items]
Total assets	10,948,652	10,956,261
Consolidated assets, Loans	10,928,152	10,933,580
Consolidated assets, All other assets	20,500	22,681
Total liabilities	10,939,846	10,924,830
Consolidated liabilities, Other short-term borrowings	17,957	16,008
Consolidated liabilities, Long-term debt	10,442,692	10,077,839
Consolidated liabilities, All other liabilities	479,197	830,983
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Trust Arrangements [Member]
Variable Interest Entity [Line Items]
Total assets	7,871,857	7,527,539
Consolidated assets, Interest-earning deposits in other banks		654
Consolidated assets, Trading account assets	493,749	336,546
Consolidated assets, Investment securities	811,669	745,846
Consolidated assets, Loans	6,566,438	6,441,864
Consolidated assets, All other assets	1	2,629
Total liabilities	7,871,292	7,522,190
Consolidated liabilities, Deposits	6,961,743	6,743,261
Consolidated liabilities, Other short-term borrowings	58,159
Consolidated liabilities, All other liabilities	851,390	778,929
Consolidated VIEs [Member] | Consolidated VIEs before Elimination [Member] | Other [Member]
Variable Interest Entity [Line Items]
Total assets	26,902	31,295
Consolidated assets, Cash and due from banks	327	350
Consolidated assets, Interest-earning deposits in other banks	3,591	2,055
Consolidated assets, Loans	5,556	6,885
Consolidated assets, All other assets	17,428	22,005
Total liabilities	22,969	27,302
Consolidated liabilities, Other short-term borrowings	4,294	5,989
Consolidated liabilities, Long-term debt	1,259	1,321
Consolidated liabilities, All other liabilities	17,416	19,992
Consolidated VIEs [Member] | Amounts Eliminated in Consolidation [Member]
Variable Interest Entity [Line Items]
Total assets	(7,182,793)	(6,877,849)
Consolidated assets, Cash and due from banks	(42,254)	(103,615)
Consolidated assets, Interest-earning deposits in other banks	(20,600)	(23,427)
Consolidated assets, Trading account assets	(7,345)	(10,592)
Consolidated assets, Investment securities	(426,809)	(289,567)
Consolidated assets, Loans	(6,665,007)	(6,429,880)
Consolidated assets, All other assets	(20,778)	(20,768)
Total liabilities	(14,821,066)	(15,045,398)
Consolidated liabilities, Deposits		(703)
Consolidated liabilities, Other short-term borrowings	(2,069,125)	(2,526,893)
Consolidated liabilities, Long-term debt	(11,776,218)	(11,374,581)
Consolidated liabilities, All other liabilities	(975,723)	(1,143,221)
Consolidated VIEs [Member] | Amount of Liabilities with Recourse to General Credit of MUFG Group [Member]
Variable Interest Entity [Line Items]
Total liabilities	(9,368,713)	(9,465,320)
Consolidated liabilities, Deposits	(6,961,743)	(6,742,558)
Consolidated liabilities, Other short-term borrowings	(1,586,600)	(1,857,923)
Consolidated liabilities, Long-term debt		(1)
Consolidated liabilities, All other liabilities	¥ (820,370)	¥ (864,838)

Variable Interest Entities (A_2

Variable Interest Entities (Assets and Liabilities of Non-consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2020	Mar. 31, 2020
Variable Interest Entity [Line Items]
Total assets	¥ 342,530,687	¥ 331,753,283
Total liabilities	326,706,148	316,008,767
Non-consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total assets	182,114,410	183,548,754
Maximum exposure	17,436,307	17,327,744
Total assets	14,003,796	14,519,503
On-balance sheet assets, Trading account assets	1,557,378	1,416,760
On-balance sheet assets, Investment securities	4,168,603	4,421,833
On-balance sheet assets, Loans	8,108,205	8,457,932
On-balance sheet assets, All other assets	169,610	222,978
Total liabilities	32,440	404,430
On-balance sheet liabilities, All other liabilities	32,440	404,430
Non-consolidated VIEs [Member] | Asset-backed Conduits [Member]
Variable Interest Entity [Line Items]
Total assets	23,625,636	27,700,099
Maximum exposure	5,601,213	5,836,895
Total assets	4,323,980	4,797,551
On-balance sheet assets, Trading account assets	196	190
On-balance sheet assets, Investment securities	1,640,676	1,737,979
On-balance sheet assets, Loans	2,683,108	3,059,382
Non-consolidated VIEs [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Total assets	56,790,968	55,644,434
Maximum exposure	2,395,171	1,918,403
Total assets	1,968,163	1,712,037
On-balance sheet assets, Trading account assets	562,081	437,858
On-balance sheet assets, Investment securities	531,817	525,022
On-balance sheet assets, Loans	832,961	724,253
On-balance sheet assets, All other assets	41,304	24,904
Total liabilities		356,679
On-balance sheet liabilities, All other liabilities		356,679
Non-consolidated VIEs [Member] | Special Purpose Entities Created for Structured Financing [Member]
Variable Interest Entity [Line Items]
Total assets	38,824,813	37,026,192
Maximum exposure	3,850,285	3,601,834
Total assets	2,854,711	2,764,156
On-balance sheet assets, Trading account assets	434,870	392,588
On-balance sheet assets, Investment securities	1,005	35,774
On-balance sheet assets, Loans	2,415,283	2,317,128
On-balance sheet assets, All other assets	3,553	18,666
Total liabilities	8,687	6,058
On-balance sheet liabilities, All other liabilities	8,687	6,058
Non-consolidated VIEs [Member] | Repackaged Instruments [Member]
Variable Interest Entity [Line Items]
Total assets	8,894,052	8,215,327
Maximum exposure	2,927,552	3,030,263
Total assets	2,859,769	2,931,617
On-balance sheet assets, Trading account assets	387,971	394,478
On-balance sheet assets, Investment securities	1,995,105	2,123,058
On-balance sheet assets, Loans	443,619	361,184
On-balance sheet assets, All other assets	33,074	52,897
Non-consolidated VIEs [Member] | Other [Member]
Variable Interest Entity [Line Items]
Total assets	53,978,941	54,962,702
Maximum exposure	2,662,086	2,940,349
Total assets	1,997,173	2,314,142
On-balance sheet assets, Trading account assets	172,260	191,646
On-balance sheet assets, Loans	1,733,234	1,995,985
On-balance sheet assets, All other assets	91,679	126,511
Total liabilities	23,753	41,693
On-balance sheet liabilities, All other liabilities	¥ 23,753	¥ 41,693

Fees and Commissions Income (De

Fees and Commissions Income (Details of Fees and Commissions Income) (Detail) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		¥ 699,772	¥ 698,463
Deposits [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		26,221	26,731
Remittances and Transfers [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		82,125	83,541
Foreign Trading Business [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		29,195	33,117
Credit card business [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		96,131	118,916
Security-related Services [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		121,629	108,403
Administration and management services for investment funds [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		106,186	71,981
Trust fees [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		61,003	58,948
Guarantee fees [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	[1]	22,802	22,846
Insurance Commissions [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		19,444	21,178
Real Estate [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		13,917	21,094
Others [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	[2]	¥ 121,119	¥ 131,708
[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.

Business Segments (Narrative) (

Business Segments (Narrative) (Detail) ¥ in Billions	6 Months Ended
	Sep. 30, 2019JPY (¥)
Customer Business [Member] | Retail & Commercial Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	¥ 4.4
Operating Segments [Member] | Japanese Corporate & Investment Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	7.2
Operating Segments [Member] | Customer Business [Member] | Global Corporate & Investment Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	6.9
Operating Segments [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	1.4
Operating Segments [Member] | Global Markets Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	12.1
Business Segment, Other [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	¥ 24.4

Business Segments (Financial In

Business Segments (Financial Information by Business Segment) (Detail) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Business segment information
Net revenue		¥ 2,129,200	¥ 2,005,800
Net interest income		1,030,417	1,137,753
Operating expenses		1,393,800	1,387,500
Operating profit (loss)		735,400	618,300
BK and TB [Member]
Business segment information
Net revenue	[1]	1,049,600	1,011,600
Net interest income		491,200	490,600
Net fees		272,700	291,300
Other		285,700	229,700
Other than BK and TB [Member]
Business segment information
Net revenue		1,079,600	994,200
Operating Segments [Member] | Customer Business [Member]
Business segment information
Net revenue		1,663,400	1,667,500
Operating expenses		1,203,700	1,213,500
Operating profit (loss)		459,700	454,000
Operating Segments [Member] | Customer Business [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	668,000	737,100
Net interest income		343,600	378,300
Net fees		298,600	320,400
Other		25,800	38,400
Operating Segments [Member] | Customer Business [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		995,400	930,400
Operating Segments [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member]
Business segment information
Net revenue		662,700	723,900
Operating expenses		553,600	590,400
Operating profit (loss)		109,100	133,500
Operating Segments [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	304,900	345,100
Net interest income		203,600	225,500
Net fees		90,600	105,200
Other		10,700	14,400
Operating Segments [Member] | Customer Business [Member] | Retail & Commercial Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		357,800	378,800
Operating Segments [Member] | Customer Business [Member] | Japanese Corporate & Investment Banking Business Group [Member]
Business segment information
Net revenue		249,800	276,200
Operating expenses		152,500	160,200
Operating profit (loss)		97,300	116,000
Operating Segments [Member] | Customer Business [Member] | Japanese Corporate & Investment Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	198,300	210,000
Net interest income		79,400	92,400
Net fees		95,900	92,400
Other		23,000	25,200
Operating Segments [Member] | Customer Business [Member] | Japanese Corporate & Investment Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		51,500	66,200
Operating Segments [Member] | Customer Business [Member] | Global Corporate & Investment Banking Business Group [Member]
Business segment information
Net revenue		197,500	199,600
Operating expenses		131,800	126,800
Operating profit (loss)		65,700	72,800
Operating Segments [Member] | Customer Business [Member] | Global Corporate & Investment Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	117,600	137,200
Net interest income		57,900	59,500
Net fees		67,500	78,000
Other		(7,800)	(300)
Operating Segments [Member] | Customer Business [Member] | Global Corporate & Investment Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		79,900	62,400
Operating Segments [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member]
Business segment information
Net revenue		415,300	366,500
Operating expenses		264,300	270,800
Operating profit (loss)		151,000	95,700
Operating Segments [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	400	(800)
Net interest income		500	100
Other		(100)	(900)
Operating Segments [Member] | Customer Business [Member] | Global Commercial Banking Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		414,900	367,300
Operating Segments [Member] | Customer Business [Member] | Asset Management & Investor Services Business Group [Member]
Business segment information
Net revenue		138,100	101,300
Operating expenses		101,500	65,300
Operating profit (loss)		36,600	36,000
Operating Segments [Member] | Customer Business [Member] | Asset Management & Investor Services Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	46,800	45,600
Net interest income		2,200	800
Net fees		44,600	44,800
Operating Segments [Member] | Customer Business [Member] | Asset Management & Investor Services Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		91,300	55,700
Operating Segments [Member] | Global Markets Business Group [Member]
Business segment information
Net revenue		461,700	336,100
Operating expenses		112,500	113,300
Operating profit (loss)		349,200	222,800
Operating Segments [Member] | Global Markets Business Group [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	343,600	239,400
Net interest income		103,400	71,800
Net fees		1,400	(6,500)
Other		238,800	174,100
Operating Segments [Member] | Global Markets Business Group [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		118,100	96,700
Business Segment, Other [Member]
Business segment information
Net revenue		4,100	2,200
Operating expenses		77,600	60,700
Operating profit (loss)		(73,500)	(58,500)
Business Segment, Other [Member] | BK and TB [Member]
Business segment information
Net revenue	[1]	38,000	35,100
Net interest income		44,200	40,500
Net fees		(27,300)	(22,600)
Other		21,100	17,200
Business Segment, Other [Member] | Other than BK and TB [Member]
Business segment information
Net revenue		¥ (33,900)	¥ (32,900)
[1]	“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 Condensed Consolidated Statements of Income) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	¥ 735,400	¥ 618,300
Provision for credit losses	(209,806)	(102,121)
Foreign exchange gains (losses)—net	69,433	(108,687)
Trading account profits —net	244,303	547,299
Equity in earnings of equity method investees—net	140,420	165,487
Impairment of goodwill	(106,479)	(241,356)
Reversal of off-balance sheet credit instruments	36,551	63,342
Income before income tax expense	1,146,114	838,492
Reconciliation [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	735,000	618,000
Provision for credit losses	(210,000)	(102,000)
Foreign exchange gains (losses)—net	87,000	(32,000)
Trading account profits —net	83,000	505,000
Equity investment securities gains (losses)—net	694,000	(26,000)
Debt investment securities losses—net	(204,000)	(136,000)
Equity in earnings of equity method investees—net	140,000	165,000
Impairment of goodwill	(106,000)	(241,000)
Reversal of off-balance sheet credit instruments	37,000	63,000
Other—net	(110,000)	24,000
Income before income tax expense	¥ 1,146,000	¥ 838,000

Fair Value (Assets and Liabilit

Fair Value (Assets and Liabilities Measured at Fair Value by Level on Recurring Basis) (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2020	Mar. 31, 2020
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	¥ 13,673,000	¥ 14,958,000
Investment securities, Available-for-sale debt securities		45,012,551	34,200,203
Equity securities		5,732,045	5,385,258
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	12,636,000	14,034,000
Obligation to return securities received as collateral		5,146,000	4,806,000
Interest Rate Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	10,477,000	10,847,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	9,640,000	10,205,000
Foreign Exchange Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	2,860,000	3,734,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	2,757,000	3,608,000
Equity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	210,000	236,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	223,000	277,000
Commodity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	31,000	26,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	30,000	26,000
Credit Derivatives [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	91,000	114,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	91,000	95,000
Other [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3],[4]	4,000	1,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3],[4]	(105,000)	(177,000)
Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		33,809,468	23,462,879
Japanese Prefectural and Municipal Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		3,343,506	2,952,820
Foreign Government and Official Institution Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,827,577	3,037,488
Corporate Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,221,287	1,272,826
Residential Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,385,594	1,459,393
Commercial Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		443,301	382,255
Asset-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,264,742	1,469,476
Other Debt Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		277,018	163,066	[5]
Commercial Paper [Member]
Assets:
Investment securities, Available-for-sale debt securities		440,058
Fair Value, Measurements, Recurring [Member]
Assets:
Trading account assets, Trading securities	[6]	32,271,748	32,479,566
Trading account assets, Trading derivative assets		13,670,492	14,957,574
Investment securities, Available-for-sale debt securities		45,012,551	34,200,203
Equity securities		5,366,266	4,808,281
Others	[7]	836,107	1,136,800
Assets at fair value, Total		97,157,164	87,582,424
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		108,798	559,382
Trading account liabilities, Trading derivative liabilities		12,737,950	14,208,051
Obligation to return securities received as collateral	[8]	5,145,912	4,806,171
Other	[9]	467,335	520,609
Liabilities at fair value, Total		18,459,995	20,094,213
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities	[6]	19,178,865	14,891,635
Trading account assets, Trading derivative assets		96,022	216,834
Investment securities, Available-for-sale debt securities		32,362,705	22,126,881
Equity securities		4,976,057	4,471,499
Others	[7]	780,868	1,054,186
Assets at fair value, Total		57,394,517	42,761,035
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		106,076	555,664
Trading account liabilities, Trading derivative liabilities		139,392	300,215
Obligation to return securities received as collateral	[8]	5,038,763	4,663,068
Liabilities at fair value, Total		5,284,231	5,518,947
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities	[6]	12,313,174	17,061,985
Trading account assets, Trading derivative assets		13,507,030	14,680,632
Investment securities, Available-for-sale debt securities		12,401,919	11,798,392
Equity securities		344,445	296,819
Others	[7]	32,590	45,913
Assets at fair value, Total		38,599,158	43,883,741
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		2,722	3,718
Trading account liabilities, Trading derivative liabilities		12,551,354	13,851,205
Obligation to return securities received as collateral	[8]	107,149	143,103
Other	[9]	418,084	514,003
Liabilities at fair value, Total		13,079,309	14,512,029
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities	[6]	779,709	525,946
Trading account assets, Trading derivative assets		67,440	60,108
Investment securities, Available-for-sale debt securities		247,927	274,930
Equity securities		45,764	39,963
Others	[7]	22,649	36,701
Assets at fair value, Total		1,163,489	937,648
Liabilities:
Trading account liabilities, Trading derivative liabilities		47,204	56,631
Other	[9]	49,251	6,606
Liabilities at fair value, Total		96,455	63,237
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		10,476,924	10,846,607
Liabilities:
Trading account liabilities, Trading derivative liabilities		9,639,660	10,205,375
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		20,459	74,488
Liabilities:
Trading account liabilities, Trading derivative liabilities		35,749	153,098
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		10,440,306	10,758,790
Liabilities:
Trading account liabilities, Trading derivative liabilities		9,596,157	10,038,198
Fair Value, Measurements, Recurring [Member] | Interest Rate Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		16,159	13,329
Liabilities:
Trading account liabilities, Trading derivative liabilities		7,754	14,079
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		2,860,293	3,733,683
Liabilities:
Trading account liabilities, Trading derivative liabilities		2,753,720	3,603,990
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		588	1,550
Liabilities:
Trading account liabilities, Trading derivative liabilities		944	3,360
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		2,849,093	3,723,087
Liabilities:
Trading account liabilities, Trading derivative liabilities		2,748,606	3,596,589
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		10,612	9,046
Liabilities:
Trading account liabilities, Trading derivative liabilities		4,170	4,041
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		210,292	235,572
Liabilities:
Trading account liabilities, Trading derivative liabilities		222,832	276,699
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		74,975	140,796
Liabilities:
Trading account liabilities, Trading derivative liabilities		102,699	143,757
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		129,075	87,285
Liabilities:
Trading account liabilities, Trading derivative liabilities		115,816	121,229
Fair Value, Measurements, Recurring [Member] | Equity Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		6,242	7,491
Liabilities:
Trading account liabilities, Trading derivative liabilities		4,317	11,713
Fair Value, Measurements, Recurring [Member] | Commodity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		30,555	27,502
Liabilities:
Trading account liabilities, Trading derivative liabilities		30,626	26,789
Fair Value, Measurements, Recurring [Member] | Commodity Contracts [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		5	10
Liabilities:
Trading account liabilities, Trading derivative liabilities		5	14
Fair Value, Measurements, Recurring [Member] | Commodity Contracts [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		30,550	27,492
Liabilities:
Trading account liabilities, Trading derivative liabilities		30,621	26,775
Fair Value, Measurements, Recurring [Member] | Credit Derivatives [Member]
Assets:
Trading account assets, Trading derivative assets		91,065	114,210
Liabilities:
Trading account liabilities, Trading derivative liabilities		90,817	95,198
Fair Value, Measurements, Recurring [Member] | Credit Derivatives [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		88,539	111,460
Liabilities:
Trading account liabilities, Trading derivative liabilities		90,756	95,175
Fair Value, Measurements, Recurring [Member] | Credit Derivatives [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		2,526	2,750
Liabilities:
Trading account liabilities, Trading derivative liabilities		61	23
Fair Value, Measurements, Recurring [Member] | Other [Member]
Assets:
Trading account assets, Trading derivative assets	[10]	1,363
Liabilities:
Trading account liabilities, Trading derivative liabilities	[10]	295
Fair Value, Measurements, Recurring [Member] | Other [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets	[10]	12
Liabilities:
Trading account liabilities, Trading derivative liabilities	[10]	14
Fair Value, Measurements, Recurring [Member] | Other [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets	[10]	1,351
Liabilities:
Trading account liabilities, Trading derivative liabilities	[10]	281
Fair Value, Measurements, Recurring [Member] | Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		33,809,468	23,462,879
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		30,410,927	19,897,187
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		3,398,541	3,565,692
Fair Value, Measurements, Recurring [Member] | Japanese Prefectural and Municipal Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		3,343,506	2,952,820
Fair Value, Measurements, Recurring [Member] | Japanese Prefectural and Municipal Bonds [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		3,343,506	2,952,820
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,827,577	3,037,488
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member] | Level 1 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,951,778	2,229,694
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		859,040	792,027
Fair Value, Measurements, Recurring [Member] | Foreign Government and Official Institution Bonds [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		16,759	15,767
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,221,287	1,272,826
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,221,142	1,262,718
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		145	10,108
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,385,594	1,459,393
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-backed Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,385,579	1,459,378
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		443,301	382,255
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-backed Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		441,505	380,278
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-backed Securities [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,796	1,977
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,264,742	1,469,476
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,138,145	1,328,601
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		126,597	140,875
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		277,018	163,066
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		174,403	56,878
Fair Value, Measurements, Recurring [Member] | Other Debt Securities [Member] | Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		102,615	106,188
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member]
Assets:
Investment securities, Available-for-sale debt securities		440,058
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member] | Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		440,058
Fair Value, Measurements, Recurring [Member] | Marketable Equity Securities [Member]
Assets:
Equity securities		5,320,502	4,768,318
Fair Value, Measurements, Recurring [Member] | Marketable Equity Securities [Member] | Level 1 [Member]
Assets:
Equity securities		4,976,057	4,471,499
Fair Value, Measurements, Recurring [Member] | Marketable Equity Securities [Member] | Level 2 [Member]
Assets:
Equity securities		344,445	296,819
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member]
Assets:
Equity securities	[11]	45,764	39,963
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member] | Real Estate Funds [Member]
Assets:
Investments valued at net asset value		23,838	23,233
Unfunded commitments		1,307	1,494
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member] | Private Equity and Other Funds [Member]
Assets:
Investments valued at net asset value		17,951	18,862
Unfunded commitments
Fair Value, Measurements, Recurring [Member] | Nonmarketable Equity Securities [Member] | Level 3 [Member]
Assets:
Equity securities	[11]	45,764	39,963
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Trading account assets, Trading securities		6,360,553	4,155,167
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		5,997,301	3,805,039
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		363,252	350,128
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese Prefectural and Municipal Bonds [Member]
Assets:
Trading account assets, Trading securities		95,846	93,479
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Japanese Prefectural and Municipal Bonds [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		95,846	93,479
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member]
Assets:
Trading account assets, Trading securities		12,493,639	9,775,245
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities		11,797,972	9,356,427
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		694,545	417,766
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Foreign Government and Official Institution Bonds [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		1,122	1,052
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Corporate Bonds [Member]
Assets:
Trading account assets, Trading securities		2,479,587	2,537,714
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Corporate Bonds [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities			11
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Corporate Bonds [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		2,479,587	2,537,559
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Corporate Bonds [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities			144
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Residential Mortgage-backed Securities [Member]
Assets:
Trading account assets, Trading securities		5,019,062	9,037,539
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Residential Mortgage-backed Securities [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities		120
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Residential Mortgage-backed Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		5,018,942	9,037,539
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Asset-backed Securities [Member]
Assets:
Trading account assets, Trading securities		1,231,091	1,006,815
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Asset-backed Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		817,786	590,556
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Asset-backed Securities [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		413,305	416,259
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Debt Securities [Member]
Assets:
Trading account assets, Trading securities		277,563	14,438
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Debt Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		7,579	7,787
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Other Debt Securities [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities		269,984	6,651
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Commercial Paper [Member]
Assets:
Trading account assets, Trading securities		1,626,513	2,959,580
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Commercial Paper [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities		1,626,513	2,959,580
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Assets:
Trading account assets, Trading securities	[12]	2,687,894	2,899,589
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Private Equity Funds [Member]
Assets:
Investments valued at net asset value		75,766	66,918
Unfunded commitments		91,287	102,743
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 1 [Member]
Assets:
Trading account assets, Trading securities	[12]	1,383,472	1,730,158
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 2 [Member]
Assets:
Trading account assets, Trading securities	[12]	1,209,124	1,067,591
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Level 3 [Member]
Assets:
Trading account assets, Trading securities	[12]	¥ 95,298	¥ 101,840
[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.
[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 mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, Deposits and Long-term debt.
[5]	Other debt securities in the table above mainly include ¥86,734 million of private placement debt conduit bonds.
[6]	Includes securities measured under the fair value option.
[7]	Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions and money in trust for segregating cash deposited by customers on security transactions.
[8]	Included in Other liabilities.
[9]	Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments.
[10]	From the period ended September 30, 2020, certain derivatives such as earthquake derivatives previously included in Commodity contracts are separately disclosed in Other of Trading derivative assets and liabilities.
[11]	Excludes certain investments valued at net asset value of real estate funds and private equity and other funds whose fair values at March 31, 2020 were ¥23,233 million and ¥18,862 million respectively, and those at September 30, 2020 were ¥23,838 million and ¥17,951 million respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2020 were ¥1,494 million and nil, respectively, and those at September 30, 2020 were ¥1,307 million and nil, respectively. For the nature and details of these investments, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.
[12]	Excludes certain investments valued at net asset value of private equity funds whose fair values at March 31, 2020 were ¥66,918 million and those at September 30, 2020 were ¥75,766 million, respectively. The amounts of unfunded commitments related to these private equity funds at March 31, 2020 were ¥102,743 million, and those at September 30, 2020 were ¥91,287 million, respectively. For the nature and details of these investments, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.

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		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		¥ 881,017	¥ 1,165,128
Total gains (losses) for the period included in earnings, Assets		16,108	(20,234)
Total gains (losses) for the period included in other comprehensive income, Assets		(5,657)	(7,218)
Purchases, Assets		296,652	310,813
Issues, Assets		(334)	(773)
Sales, Assets		(65,706)	(122,068)
Settlements, Assets		(158,507)	(290,028)
Transfers into Level 3, Assets		190,304	67,885
Transfers out of Level 3, Assets		(37,592)	(18,945)
Level 3 assets, Ending balance		1,116,285	1,084,560
Change in unrealized gains (losses) included in earnings for assets still held at period end		(9,242)	(24,443)
Level 3 liabilities, Beginning balance		6,606	65,648
Total gains (losses) for the period included in earnings, Liabilities		(18,465)	(18,504)
Total gains (losses) for the period included in other comprehensive income, Liabilities		3,711	1,807
Issues, Liabilities		30,192	2,338
Settlements, Liabilities		(9,309)	(9,708)
Transfers into Level 3, Liabilities		11,330	1,171
Transfers out of Level 3, Liabilities		(4,322)	(37,043)
Level 3 liabilities, Ending balance		49,251	39,103
Change in unrealized gains (losses) included in earnings for liabilities still held at period end		(14,090)	(16,212)
Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 liabilities, Beginning balance		6,606	65,648
Total gains (losses) for the period included in earnings, Liabilities	[1]	(18,465)	(18,504)
Total gains (losses) for the period included in other comprehensive income, Liabilities		3,711	1,807
Issues, Liabilities		30,192	2,338
Settlements, Liabilities		(9,309)	(9,708)
Transfers into Level 3, Liabilities	[2]	11,330	1,171
Transfers out of Level 3, Liabilities	[2]	(4,322)	(37,043)
Level 3 liabilities, Ending balance		49,251	39,103
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	[1]	(14,090)	(16,212)
Trading Account Assets, Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance	[3]	525,946	785,326
Total gains (losses) for the period included in earnings, Assets	[3],[4]	(627)	(20,158)
Purchases, Assets	[3]	158,481	134,609
Sales, Assets	[3]	(65,231)	(120,505)
Settlements, Assets	[3]	(2,091)	(105,890)
Transfers into Level 3, Assets	[3]	190,391	24,882
Transfers out of Level 3, Assets	[3]	(27,160)	(15,402)
Level 3 assets, Ending balance	[3]	779,709	682,862
Change in unrealized gains (losses) included in earnings for assets still held at period end	[3],[4]	(1,434)	(19,011)
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		1,052	792
Total gains (losses) for the period included in earnings, Assets		188	347
Purchases, Assets		12,625	50,548
Sales, Assets		(12,713)	(48,068)
Settlements, Assets		(14)	(18)
Transfers out of Level 3, Assets		(16)
Level 3 assets, Ending balance		1,122	3,601
Change in unrealized gains (losses) included in earnings for assets still held at period end		78	(11)
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		144	31,384
Total gains (losses) for the period included in earnings, Assets		35	(76)
Sales, Assets		(179)	(1,049)
Settlements, Assets			(3,621)
Transfers into Level 3, Assets	[5]		24,882
Transfers out of Level 3, Assets	[5]		(15,402)
Level 3 assets, Ending balance			36,118
Change in unrealized gains (losses) included in earnings for assets still held at period end			6
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			35,181
Total gains (losses) for the period included in earnings, Assets			(1,425)
Sales, Assets			(11,134)
Settlements, Assets			(10,649)
Level 3 assets, Ending balance			11,973
Change in unrealized gains (losses) included in earnings for assets still held at period end			(1,109)
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		416,259	627,678
Total gains (losses) for the period included in earnings, Assets		(1,685)	(20,780)
Purchases, Assets		46,455	79,717
Sales, Assets		(46,700)	(60,249)
Settlements, Assets		(1,024)	(89,939)
Level 3 assets, Ending balance		413,305	536,427
Change in unrealized gains (losses) included in earnings for assets still held at period end		(1,728)	(18,740)
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		6,651	35,148
Total gains (losses) for the period included in earnings, Assets		3,446	(952)
Purchases, Assets		69,498
Transfers into Level 3, Assets	[6]	190,389
Level 3 assets, Ending balance		269,984	34,196
Change in unrealized gains (losses) included in earnings for assets still held at period end		3,446	(952)
Trading Account Assets, Trading Securities, Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		101,840	55,143
Total gains (losses) for the period included in earnings, Assets		(2,611)	2,728
Purchases, Assets		29,903	4,344
Sales, Assets		(5,639)	(5)
Settlements, Assets		(1,053)	(1,663)
Transfers into Level 3, Assets		2
Transfers out of Level 3, Assets	[6]	(27,144)
Level 3 assets, Ending balance		95,298	60,547
Change in unrealized gains (losses) included in earnings for assets still held at period end		(3,230)	1,795
Trading Account Assets, Trading Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		3,477	36,170
Total gains (losses) for the period included in earnings, Assets	[4]	33,219	4,283
Total gains (losses) for the period included in other comprehensive income, Assets		(757)	(107)
Purchases, Assets		595	99
Issues, Assets		(334)	(773)
Settlements, Assets		(15,112)	(21,616)
Transfers into Level 3, Assets		(392)	37,553
Transfers out of Level 3, Assets		(460)	(321)
Level 3 assets, Ending balance		20,236	55,288
Change in unrealized gains (losses) included in earnings for assets still held at period end	[4]	7,640	1,797
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		(750)	(4,189)
Total gains (losses) for the period included in earnings, Assets		13,271	14,185
Total gains (losses) for the period included in other comprehensive income, Assets		(341)	(113)
Settlements, Assets		(3,364)	(5,471)
Transfers into Level 3, Assets		(15)	2,976
Transfers out of Level 3, Assets		(396)	(340)
Level 3 assets, Ending balance		8,405	7,048
Change in unrealized gains (losses) included in earnings for assets still held at period end		5,130	6,246
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		5,005	18,191
Total gains (losses) for the period included in earnings, Assets		1,909	(10,614)
Total gains (losses) for the period included in other comprehensive income, Assets		(276)	(87)
Purchases, Assets			3
Settlements, Assets		159	4,037
Transfers into Level 3, Assets		(377)	34,577	[5]
Transfers out of Level 3, Assets		22	(144)
Level 3 assets, Ending balance		6,442	45,963
Change in unrealized gains (losses) included in earnings for assets still held at period end		1,226	(5,580)
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		(4,222)	2,862
Total gains (losses) for the period included in earnings, Assets		18,054	743
Total gains (losses) for the period included in other comprehensive income, Assets		(145)	87
Purchases, Assets			96
Issues, Assets			(419)
Settlements, Assets		(11,748)	(5,350)
Transfers out of Level 3, Assets		(14)	163
Level 3 assets, Ending balance		1,925	(1,818)
Change in unrealized gains (losses) included in earnings for assets still held at period end		1,288	703
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		(65)	949
Total gains (losses) for the period included in earnings, Assets		(11)	(27)
Total gains (losses) for the period included in other comprehensive income, Assets		5	2
Issues, Assets			(354)
Level 3 assets, Ending balance		(71)	570
Change in unrealized gains (losses) included in earnings for assets still held at period end			645
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		2,727	18,357
Total gains (losses) for the period included in earnings, Assets		(103)	(4)
Total gains (losses) for the period included in other comprehensive income, Assets			4
Settlements, Assets		(159)	(14,832)
Level 3 assets, Ending balance		2,465	3,525
Change in unrealized gains (losses) included in earnings for assets still held at period end		(103)	(217)
Trading Account Assets, Trading Derivatives [Member] | Other—net [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance	[7]	782
Total gains (losses) for the period included in earnings, Assets	[7]	99
Purchases, Assets	[7]	595
Issues, Assets	[7]	(334)
Transfers out of Level 3, Assets	[7]	(72)
Level 3 assets, Ending balance	[7]	1,070
Change in unrealized gains (losses) included in earnings for assets still held at period end	[7]	99
Investment Securities, Available-for-sale Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		274,930	283,434
Total gains (losses) for the period included in earnings, Assets	[8]	(1,478)	1,331
Total gains (losses) for the period included in other comprehensive income, Assets		(4,400)	(5,379)
Purchases, Assets		130,042	134,575
Sales, Assets		(11)
Settlements, Assets		(141,214)	(162,520)
Transfers into Level 3, Assets		20	5,450
Transfers out of Level 3, Assets		(9,962)	(3,020)
Level 3 assets, Ending balance		247,927	253,871
Change in unrealized gains (losses) included in earnings for assets still held at period end	[8]	(206)	(619)
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		15,767	19,246
Total gains (losses) for the period included in other comprehensive income, Assets		(682)	209
Purchases, Assets		3,230	382
Settlements, Assets		(1,556)	(5,835)
Level 3 assets, Ending balance		16,759	14,002
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		10,108	4,196
Total gains (losses) for the period included in earnings, Assets		(3)	(383)
Total gains (losses) for the period included in other comprehensive income, Assets			114
Purchases, Assets			20
Settlements, Assets		(18)	(641)
Transfers into Level 3, Assets		20	5,450	[5]
Transfers out of Level 3, Assets	[5]	(9,962)	(3,020)
Level 3 assets, Ending balance		145	5,736
Change in unrealized gains (losses) included in earnings for assets still held at period end		(4)	(619)
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		1,977	2,038
Total gains (losses) for the period included in other comprehensive income, Assets		(149)	58
Sales, Assets		(11)
Settlements, Assets		(21)	(33)
Level 3 assets, Ending balance		1,796	2,063
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		140,875	131,455
Total gains (losses) for the period included in earnings, Assets		(1,475)	1,714
Total gains (losses) for the period included in other comprehensive income, Assets		(2,416)	(3,914)
Purchases, Assets		126,800	134,169
Settlements, Assets		(137,187)	(132,544)
Level 3 assets, Ending balance		126,597	130,880
Change in unrealized gains (losses) included in earnings for assets still held at period end		(202)
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		106,188	126,484
Total gains (losses) for the period included in other comprehensive income, Assets		(1,153)	(1,846)
Purchases, Assets		12	4
Settlements, Assets		(2,432)	(23,467)
Level 3 assets, Ending balance		102,615	101,175
Investment Securities, Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		39,963	27,820
Total gains (losses) for the period included in earnings, Assets	[8]	(423)	2,660
Purchases, Assets		6,413	5,636
Sales, Assets		(464)	(1,515)
Settlements, Assets			(1)
Transfers into Level 3, Assets		285
Transfers out of Level 3, Assets		(10)	(202)
Level 3 assets, Ending balance		45,764	34,398
Change in unrealized gains (losses) included in earnings for assets still held at period end	[8]	(665)	1,736
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		39,963	27,820
Total gains (losses) for the period included in earnings, Assets		(423)	2,660
Purchases, Assets		6,413	5,636
Sales, Assets		(464)	(1,515)
Settlements, Assets			(1)
Transfers into Level 3, Assets		285
Transfers out of Level 3, Assets		(10)	(202)
Level 3 assets, Ending balance		45,764	34,398
Change in unrealized gains (losses) included in earnings for assets still held at period end		(665)	1,736
Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		36,701	32,378
Total gains (losses) for the period included in earnings, Assets	[9]	(14,583)	(8,350)
Total gains (losses) for the period included in other comprehensive income, Assets		(500)	(1,732)
Purchases, Assets		1,121	35,894
Sales, Assets			(48)
Settlements, Assets		(90)	(1)
Level 3 assets, Ending balance		22,649	58,141
Change in unrealized gains (losses) included in earnings for assets still held at period end	[9]	¥ (14,577)	¥ (8,346)
[1]	Included in Trading account profits—net.
[2]	Transfers into (out of) Level 3 for embedded derivatives in Other 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—net and Foreign exchange gains (losses)—net.
[5]	Transfers into Level 3 for Foreign exchange contracts—net were mainly caused by the valuation using certain unobservable input. For the six months ended September 30, 2019, transfers into (out of) Level 3 for corporate bonds were mainly caused by the decrease (increase) in liquidity or the availability of the quoted prices provided by third-party venders. For the six months ended September 30, 2020, transfers out of Level 3 for corporate bonds were due to changes in the impact of unobservable credit worthiness inputs to the entire fair value measurement of the private placement bonds issued by Japanese non-public companies. Unobservable credit worthiness inputs include probability of default based on credit ratings of the bond issuers and loss given default.
[6]	Transfers relate to the reclassification of certain securities
[7]	From the period ended September 30, 2020, certain derivatives such as earthquake derivatives previously included in Commodity contracts—net are separately disclosed in Other—net of Trading derivatives—net.
[8]	Included in Investment securities gains—net and Other comprehensive income—net.
[9]	Included in Fees and commissions income and 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		Sep. 30, 2020JPY (¥)yr	Mar. 31, 2020JPY (¥)yr
Interest Rate Contracts [Member] | Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ 6,917	¥ (728)
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		0.300	0.329
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		0.632	0.625
Interest Rate Contracts [Member] | Option Model [Member] | Correlation Between Interest Rates [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.457
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		0.156	0.167
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	0.600
Interest Rate Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Foreign Exchange Rate [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.403
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	0
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		1	1
Interest Rate Contracts [Member] | Option Model [Member] | Volatility [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.500
Foreign Exchange Contracts [Member] | Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ 6,442	¥ 5,005
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		0.300	0.300
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	0.700
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Interest Rates [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.474
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		0.174	0.158
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	0.600
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Interest Rate and Foreign Exchange Rate [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.385
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Foreign Exchange Rate [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.550	0.600
Foreign Exchange Contracts [Member] | Option Model [Member] | Correlation Between Foreign Exchange Rate [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.550
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		0.095	0.075
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		0.223	0.170
Foreign Exchange Contracts [Member] | Option Model [Member] | Volatility [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.144
Equity Contracts [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ 5,091	¥ 6,166
Equity Contracts [Member] | Discounted Cash Flow [Member] | Term of Litigation [Member] | Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs | yr		0.1	0.1
Equity Contracts [Member] | Discounted Cash Flow [Member] | Term of Litigation [Member] | Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs | yr		1.2	1.1
Equity Contracts [Member] | Discounted Cash Flow [Member] | Term of Litigation [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs | yr	[2]	0.6
Equity Contracts [Member] | Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ (3,054)	¥ (10,038)
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		0.290	0.242
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		0.400	0.320
Equity Contracts [Member] | Option Model [Member] | Volatility [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.315
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		(0.584)	(0.584)
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		0.564	0.569
Equity Contracts [Member] | Option Model [Member] | Correlation Between Foreign Exchange Rate and Equity [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.326
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		0.191	0.195
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		0.960	0.810
Equity Contracts [Member] | Option Model [Member] | Correlation Between Equities [Member] | Median [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	[2]	0.537
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]	¥ 16,759	¥ 15,767
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		0.002	0.002
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		0.018	0.013
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]	0.006	0.004
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		0.350	0.550
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		0.900	0.900
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]	0.666	0.699
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	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	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]	0.099	0.099
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]	¥ 86,222	¥ 92,025
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		0.046	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]	0.051	0.050
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		0.650	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]	0.688	0.682
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]	¥ 381,036	¥ 389,170
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]	0.010	0.010
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]	0.010	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]	0.015	0.011
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]	0.016	0.014
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]	0.016	0.014
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]	0.222	0.210
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]	0.222	0.210
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]	0.911	0.990
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	[4]			[3]
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]	0.511	0.578
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]	0.511	0.578
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]	¥ 269,984	¥ 6,651
Other Debt Securities [Member] | Discounted Cash Flow [Member] | Liquidity Premium [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.024
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
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		0.031
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]	0.029	0.024
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]	¥ 83,647	¥ 86,734
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]	0.004	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		0.550	0.600
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]	0.781	0.798
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]	0.096	0.094
Equity Securities [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]		¥ 27,144
Equity Securities [Member] | Discounted Cash Flow [Member] | Liquidity Premium [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.010
Equity 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]		0.010
[1]	The fair value as of March 31, 2020 and September 30, 2020 excludes the fair value of investments valued using vendor prices.
[2]	Weighted average is calculated by weighing each input by the relative fair value of the respective financial instruments for investment securities. Median is used for derivative instruments.
[3]	For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.
[4]	See “Probability of default” in “Sensitivity to and range of unobservable inputs” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.

Fair Value (Carrying Value of A

Fair Value (Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level) (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Goodwill		¥ 405,009	¥ 517,626	¥ 616,620	¥ 433,891
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	12,992	18,176
Loans		275,876	272,029
Loans, Loans held for sale		44,210	73,573
Loans, Collateral dependent loans		231,666	198,456
Premises and equipment		7,877	37,109
Intangible assets		1,357	453
Goodwill		97,072	283,032
Other assets		154,541	91,624
Other assets, Investments in equity method investees	[1]	145,466	78,926
Other assets, Other		9,075	12,698
Assets at fair value, Total		549,715	702,423
Fair Value, Measurements, Nonrecurring [Member] | Private Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities valued at net asset value		10,031	12,935
Unfunded commitments related to investment securities valued at net asset value		13,219	17,216
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans		2,648	2,548
Loans, Collateral dependent loans		2,648	2,548
Other assets		111,626	73,015
Other assets, Investments in equity method investees	[1]	111,626	73,015
Assets at fair value, Total		114,274	75,563
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	11,091	15,473
Loans		9,800	9,199
Loans, Collateral dependent loans		9,800	9,199
Other assets		33,840
Other assets, Investments in equity method investees	[1]	33,840
Assets at fair value, Total		54,731	24,672
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	1,901	2,703
Loans		263,428	260,282
Loans, Loans held for sale		44,210	73,573
Loans, Collateral dependent loans		219,218	186,709
Premises and equipment		7,877	37,109
Intangible assets		1,357	453
Goodwill		97,072	283,032
Other assets		9,075	18,609
Other assets, Investments in equity method investees	[1]		5,911
Other assets, Other		9,075	12,698
Assets at fair value, Total		¥ 380,710	¥ 602,188
[1]	Excludes certain investments valued at net asset value of ¥12,935 million and ¥10,031 million at March 31, 2020 and September 30, 2020, respectively. The unfunded commitments related to these investments are ¥17,216 million and ¥13,219 million at March 31, 2020 and September 30, 2020, respectively. These investments are in private equity funds. For the nature and details of private equity funds, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2020.
[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	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 295,299	¥ 297,959
Investment Securities [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	(701)	2,193
Loans [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	89,082	30,664
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	5,620	8,468
Loans [Member] | Collateral Dependent Loans [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	83,462	22,196
Premises and Equipment [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	8,569	5,975
Intangible Assets [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	4,286	2,334
Goodwill [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	106,479	241,356
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	87,584	15,437
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	53,138	4,944
Other Assets [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 34,446	¥ 10,493

Fair Value (Gains (Losses) Rela

Fair Value (Gains (Losses) Related to Instruments for which Fair Value Option was Elected) (Detail) - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Financial Liabilities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		¥ (32,750)	¥ (21,337)
Financial Liabilities [Member] | Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		(32,750)	(21,337)
Financial Liabilities [Member] | Other Short-term Borrowings [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(15,805)	(778)
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]	(15,805)	(778)
Financial Liabilities [Member] | Long-term Debt [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(16,945)	(20,559)
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]	(16,945)	(20,559)
Financial Assets [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		(89,160)	(216,691)
Financial Assets [Member] | Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		148,265	437,931
Financial Assets [Member] | Foreign Exchange Gains (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		(237,425)	(654,622)
Financial Assets [Member] | Trading Account Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		(89,160)	(216,691)
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		148,265	437,931
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		¥ (237,425)	¥ (654,622)
[1]	Change in value attributable to the instrument-specific credit risk related to those financial liabilities are not material.

Fair Value (Differences between

Fair Value (Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2020	Mar. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	¥ 416,035	¥ 319,149
Fair value, Financial liabilities	393,710	304,067
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	(22,325)	(15,082)
Long-term Debt [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	416,035	319,149
Fair value, Financial liabilities	393,710	304,067
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	¥ (22,325)	¥ (15,082)

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 Billions		Sep. 30, 2020	Mar. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying amounts of investments in equity method investees		¥ 2,327	¥ 2,421
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		46,982	33,283
Interest-earning deposits in other banks		46,936	45,267
Call loans and funds sold		1,049	1,169
Receivables under resale agreements		14,051	23,996
Receivables under securities borrowing transactions		3,199	3,444
Investment securities		3,930	4,166
Loans, net of allowance for credit losses	[1]	115,532	117,373
Other financial assets	[2]	7,194	8,494
Deposits, Non-interest-bearing		35,643	33,382
Deposits, Interest-bearing		182,750	170,574
Total deposits		218,393	203,956
Call money and funds purchased		3,797	3,669
Payables under repurchase agreements		26,448	31,850
Payables under securities lending transactions		842	1,017
Due to trust account and other short-term borrowings		14,916	19,057
Long-term debt		35,391	27,772
Other financial liabilities		6,880	7,139
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		46,982	33,283
Interest-earning deposits in other banks		46,936	45,267
Call loans and funds sold		1,049	1,169
Receivables under resale agreements		14,051	23,996
Receivables under securities borrowing transactions		3,199	3,444
Investment securities		3,972	4,178
Loans, net of allowance for credit losses	[1]	116,984	118,497
Other financial assets	[2]	7,194	8,494
Deposits, Non-interest-bearing		35,643	33,382
Deposits, Interest-bearing		182,789	170,631
Total deposits		218,432	204,013
Call money and funds purchased		3,797	3,669
Payables under repurchase agreements		26,448	31,850
Payables under securities lending transactions		842	1,017
Due to trust account and other short-term borrowings		14,916	19,057
Long-term debt		35,824	27,941
Other financial liabilities		6,880	7,139
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		46,982	33,283
Investment securities		1,127	1,134
Loans, net of allowance for credit losses	[1]	3	3
Estimated Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest-earning deposits in other banks		46,936	45,267
Call loans and funds sold		1,049	1,169
Receivables under resale agreements		14,051	23,996
Receivables under securities borrowing transactions		3,199	3,444
Investment securities		907	1,042
Loans, net of allowance for credit losses	[1]	265	259
Other financial assets	[2]	7,194	8,494
Deposits, Non-interest-bearing		35,643	33,382
Deposits, Interest-bearing		182,789	170,631
Total deposits		218,432	204,013
Call money and funds purchased		3,797	3,669
Payables under repurchase agreements		26,448	31,850
Payables under securities lending transactions		842	1,017
Due to trust account and other short-term borrowings		14,916	19,057
Long-term debt		35,824	27,941
Other financial liabilities		6,880	7,139
Estimated Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities		1,938	2,002
Loans, net of allowance for credit losses	[1]	¥ 116,716	¥ 118,235
[1]	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.
[2]	Excludes investments in equity method investees of ¥2,421 billion and ¥2,327 billion at March 31, 2020 and September 30, 2020, respectively.

Investments in Equity Method _3

Investments in Equity Method Investees (Summarized Operating Results of Morgan Stanley) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Equity Method Investment, Summarized Financial Information, Income and Loss
Net income applicable to Morgan Stanley	¥ 780,005	¥ 617,321
Morgan Stanley [Member]
Equity Method Investment, Summarized Financial Information, Income and Loss
Net revenues	2,681,000	2,203,000
Total non-interest expenses	1,842,000	1,593,000
Income from continuing operations before income taxes	839,000	610,000
Morgan Stanley [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Equity Method Investment, Summarized Financial Information, Income and Loss
Net income applicable to Morgan Stanley	¥ 632,000	¥ 475,000

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Detail) - Subsequent Event [Member] - Common Stock [Member] ¥ / shares in Units, ¥ in Millions	Nov. 30, 2020JPY (¥)¥ / shares
Subsequent Event [Line Items]
Dividends payable, amount per share | ¥ / shares	¥ 12.5
Dividends payable, total amount | ¥	¥ 160,918
Dividends payable, date to be paid	Dec. 7, 2020
Dividends payable, date of record	Sep. 30, 2020