Mitsubishi UFJ Financial (MUFG) 6-K 27 Dec 21 Current report (foreign) Financial data

Cover Page

Cover Page	6 Months Ended
	Sep. 30, 2021
Cover [Abstract]
Document Type	6-K
Entity Registrant Name	MITSUBISHI UFJ FINANCIAL GROUP, INC.
Document Period End Date	Sep. 30, 2021
Amendment Flag	false
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, 2021	Mar. 31, 2021
ASSETS
Cash and due from banks	¥ 50,469,922	¥ 49,977,480
Interest-earning deposits in other banks	53,141,070	53,346,721
Cash, due from banks and interest-earning deposits in other banks	103,610,992	103,324,201
Call loans, funds sold, and receivables under resale agreements	13,526,064	15,035,838
Receivables under securities borrowing transactions	3,466,015	3,369,903
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥5,032,178 and ¥7,390,869 at March 31, 2021 and September 30, 2021) (including ¥18,231,238 and ¥20,453,438 at March 31, 2021 and September 30, 2021 measured at fair value under fair value option)	45,337,381	44,444,379
Investment securities:
Available-for-sale debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥2,877,061 and ¥3,209,901 at March 31, 2021 and September 30, 2021)	47,099,281	47,117,813
Held-to-maturity debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥105,029 and ¥105,025 at March 31, 2021 and September 30, 2021) (fair value of ¥3,939,143 and ¥3,304,908 at March 31, 2021 and September 30, 2021)	3,271,606	3,903,763
Equity securities (including assets pledged that secured parties are permitted to sell or repledge of ¥1,532 and ¥1,006 at March 31, 2021 and September 30, 2021) (including ¥5,866,846 and ¥5,950,105 at March 31, 2021 and September 30, 2021 measured at fair value)	6,313,287	6,222,920
Total investment securities	56,684,174	57,244,496
Loans, net of unearned income, unamortized premiums and deferred loan fees (including assets pledged that secured parties are permitted to sell or repledge of ¥204,488 and ¥192,930 at March 31, 2021 and September 30, 2021)	106,350,454	115,718,863
Allowance for credit losses	(1,171,458)	(1,348,391)
Net loans	105,178,996	114,370,472
Premises and equipment—net	827,269	874,992
Customers’ acceptance liability	283,940	283,194
Intangible assets—net	1,149,539	1,184,994
Goodwill	300,058	370,852
Other assets (including assets held for sale relating to transferred business of MUFG Union Bank at September 30, 2021 and net of allowance for credit losses of ¥14,741 and ¥13,466 at March 31, 2021 and September 30, 2021)	23,428,681	13,321,304
Total assets	353,793,109	353,824,625
Deposits:
Domestic offices, Non-interest-bearing	32,156,904	32,287,997
Domestic offices, Interest-bearing	141,900,253	141,908,498
Overseas offices, principally interest-bearing	45,885,914	55,010,441
Total deposits	219,943,071	229,206,936
Call money, funds purchased, and payables under repurchase agreements	28,068,840	26,921,773
Payables under securities lending transactions	833,696	842,590
Due to trust account and other short-term borrowings (including ¥196,113 and ¥34,313 at March 31, 2021 and September 30, 2021 measured at fair value under fair value option)	18,102,080	18,079,554
Trading account liabilities	9,527,062	12,017,553
Bank acceptances outstanding	283,940	283,194
Long-term debt (including ¥402,823 and ¥499,929 at March 31, 2021 and September 30, 2021 measured at fair value under fair value option)	33,482,214	35,157,651
Other liabilities (including liabilities held for sale relating to transferred business of MUFG Union Bank at September 30, 2021)	26,451,387	15,070,820
Liabilities, Total	336,692,290	337,580,071
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, 2021 and September 30, 2021, with no stated value	2,090,270	2,090,270
Capital surplus	5,524,313	5,533,761
Retained earnings:
Appropriated for legal reserve	239,571	239,571
Unappropriated retained earnings	9,166,932	8,589,900
Accumulated other comprehensive loss, net of taxes	(81,491)	(289,481)
Treasury stock, at cost—737,282,154 common shares and 742,541,406 common shares at March 31, 2021 and September 30, 2021	(506,357)	(503,072)
Total Mitsubishi UFJ Financial Group shareholders’ equity	16,433,238	15,660,949
Noncontrolling interests	667,581	583,605
Total equity	17,100,819	16,244,554
Total liabilities and equity	353,793,109	353,824,625
Consolidated VIEs
ASSETS
Cash and due from banks	2,907	2,698
Interest-earning deposits in other banks	31,063	30,422
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥5,032,178 and ¥7,390,869 at March 31, 2021 and September 30, 2021) (including ¥18,231,238 and ¥20,453,438 at March 31, 2021 and September 30, 2021 measured at fair value under fair value option)	1,066,073	959,001
Investment securities:
Total investment securities	1,721,039	1,727,292
Net loans	15,652,916	15,247,928
All other assets	211,543	161,075
Total assets	18,685,541	18,128,416
Deposits:
Total deposits	0	0
Long-term debt (including ¥402,823 and ¥499,929 at March 31, 2021 and September 30, 2021 measured at fair value under fair value option)	415,517	457,763
Other short-term borrowings	47,219	33,599
All other liabilities	67,735	103,457
Liabilities, Total	¥ 530,471	¥ 594,819

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Statement of Financial Position [Abstract]
Trading account assets pledged that secured parties are permitted to sell or repledge	¥ 7,390,869	¥ 5,032,178
Trading account assets measured at fair value under fair value option	20,453,438	18,231,238
Available-for-sale debt securities pledged that secured parties are permitted to sell or repledge	3,209,901	2,877,061
Held-to-maturity debt securities pledged that secured parties are permitted to sell or repledge	105,025	105,029
Held-to-maturity debt securities, Fair value	3,304,908	3,939,143
Equity securities pledged that secured parties are permitted to sell or repledge	1,006	1,532
Equity securities measured at fair value	5,950,105	5,866,846
Loans, net of unearned income, unamortized premiums and deferred loan fees, pledged that secured parties are permitted to sell or repledge	192,930	204,488
Allowance for credit losses	13,466	14,741
Due to trust account and other short-term borrowings measured at fair value under fair value option	34,313	196,113
Long-term debt measured at fair value under fair value option	¥ 499,929	¥ 402,823
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	¥ 0	¥ 0
Treasury stock, shares	742,541,406	737,282,154

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - JPY (¥) shares in Thousands, ¥ in Millions		6 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Interest income:
Loans, including fees		¥ 851,515	¥ 1,034,727
Deposits in other banks		27,048	30,422
Investment securities		162,407	160,273
Trading account assets		194,044	196,858
Call loans, funds sold, and receivables under resale agreements and securities borrowing transactions		16,694	64,603
Total		1,251,708	1,486,883
Interest expense:
Deposits		111,927	197,457
Call money, funds purchased, and payables under repurchase agreements and securities lending transactions		15,870	75,468
Due to trust account, other short-term borrowings and trading account liabilities		20,879	44,649
Long-term debt		123,580	138,892
Total		272,256	456,466
Net interest income		979,452	1,030,417
Provision for (reversal of ) credit losses		(10,838)	209,806
Net interest income after provision for credit losses		990,290	820,611
Non-interest income:
Fees and commissions income		798,065	699,772
Foreign exchange gains —net		5,382	69,433
Trading account profits—net		59,171	244,303
Investment securities gains—net		335,333	683,661
Equity in earnings of equity method investees—net		216,085	140,420
Other non-interest income		93,305	19,658
Total		1,507,341	1,857,247
Non-interest expense:
Salaries and employee benefits		638,930	607,166
Occupancy expenses—net		84,227	89,628
Fees and commissions expenses		157,911	148,250
Outsourcing expenses, including data processing		152,125	146,721
Depreciation of premises and equipment		40,505	43,807
Amortization of intangible assets		129,528	123,181
Insurance premiums, including deposit insurance		47,416	42,825
Communications		28,819	30,182
Taxes and public charges		51,178	52,599
Impairment of goodwill		0	106,479
Reversal of off-balance sheet credit instruments		(6,381)	(36,551)
Other non-interest expenses		122,844	177,457
Total		1,447,102	1,531,744
Income before income tax expense		1,050,529	1,146,114
Income tax expense		293,696	366,109
Net income before attribution of noncontrolling interests		756,833	780,005
Net income attributable to noncontrolling interests		19,222	3,105
Net income attributable to Mitsubishi UFJ Financial Group		737,611	776,900
Effect of dilutive instruments:
Restricted stock units and performance stock units	[1]	(2,559)	(1,891)
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions		¥ 735,052	¥ 775,009
Shares used for the computation of basic EPS and diluted EPS (Denominator):
Weighted average common shares outstanding (in shares)		12,852,177	12,856,192
Effect of dilutive instruments:
Stock acquisition rights (in shares)	[1]	0	0
Weighted average common shares for diluted computation (in shares)		12,852,177	12,856,192
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 (in JPY per share)		¥ 57.39	¥ 60.43
Diluted earnings per common share—Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group (in JPY per share)	[1]	57.19	60.28
Cash dividend per common share (in JPY per share)		¥ 12.50	¥ 12.50
[1]	For the six months ended September 30, 2020 and 2021, 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, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income before attribution of noncontrolling interests	¥ 756,833	¥ 780,005
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on investment securities	(14,505)	60,183
Net debt valuation adjustments	5,965	(59,324)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges	(5,576)	38,006
Defined benefit plans	(9,293)	27,768
Foreign currency translation adjustments	250,603	(194,642)
Other Comprehensive Income (Loss), Net of Tax, Total	227,194	(128,009)
Comprehensive income	984,027	651,996
Net income attributable to noncontrolling interests	19,222	3,105
Other comprehensive income (loss) attributable to noncontrolling interests	19,204	(4,292)
Comprehensive income attributable to Mitsubishi UFJ Financial Group	¥ 945,601	¥ 653,183

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Equity (Unaudited) - JPY (¥) ¥ in Millions	Total	Capital stock:	Capital surplus:	Retained earnings appropriated for legal reserve:	Unappropriated retained earnings:	Unappropriated retained earnings:Revision of Prior Period, Accounting Standards Update, Adjustment	Accumulated other comprehensive income(loss), net of taxes:	Accumulated other comprehensive income(loss), net of taxes:Revision of Prior Period, Accounting Standards Update, Adjustment	Treasury stock, at cost:	Noncontrolling interests:	Noncontrolling interests:Revision of Prior Period, Accounting Standards Update, Adjustment	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]
Balance at beginning of period at Mar. 31, 2020		¥ 2,090,270	¥ 5,533,520	¥ 239,571	¥ 8,079,530		¥ (420,417)		¥ (505,987)	¥ 728,029
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			(2,363)
Other—net			(2,456)							(92)
Common stock—¥12.50 per share and ¥12.50 per share in 2020 and 2021					(160,518)
Other comprehensive income (loss), net of taxes	¥ (128,009)						(123,717)			(4,292)
Purchases of shares of treasury stock									(6)
Sales of shares of treasury stock									2,600
Net decrease (increase) 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 before attribution of noncontrolling interests	780,005				776,900					3,105
Dividends paid to noncontrolling interests										(6,517)
Balance at end of period at Sep. 30, 2020	15,824,539	2,090,270	5,528,701	239,571	8,410,074	¥ (285,838)	(544,100)	¥ 34	(503,361)	603,384	¥ (25,330)	¥ 15,221,155
Balance at beginning of period at Mar. 31, 2021	16,244,554	2,090,270	5,533,761	239,571	8,589,900		(289,481)		(503,072)	583,605
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			(6,937)
Other—net			(2,511)							(18)
Common stock—¥12.50 per share and ¥12.50 per share in 2020 and 2021					(160,579)
Other comprehensive income (loss), net of taxes	227,194						207,990			19,204
Purchases of shares of treasury stock									(8,507)
Sales of shares of treasury stock									5,577
Net decrease (increase) resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies									(355)
Initial subscriptions of noncontrolling interests										1,627
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders										71,318
Decrease in noncontrolling interests related to deconsolidation of subsidiaries										(9,919)
Net income before attribution of noncontrolling interests	756,833				737,611					19,222
Dividends paid to noncontrolling interests										(17,458)
Balance at end of period at Sep. 30, 2021	¥ 17,100,819	¥ 2,090,270	¥ 5,524,313	¥ 239,571	¥ 9,166,932	¥ 0	¥ (81,491)	¥ 0	¥ (506,357)	¥ 667,581	¥ 0	¥ 16,433,238
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of adopting new guidance on measurement of credit losses on financial instruments	Accounting Standards Update 2019-05 [Member]

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Equity (Unaudited) (Parenthetical) - ¥ / shares	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash dividends: Common stock, per share (in JPY per share)	¥ 12.50	¥ 12.50
Unappropriated retained earnings:
Cash dividends: Common stock, per share (in JPY per share)	¥ 12.50	¥ 12.50

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income before attribution of noncontrolling interests	¥ 756,833	¥ 780,005
Adjustments to reconcile net income before attribution of noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization	170,033	166,988
Impairment of goodwill	0	106,479
Provision for (reversal of) credit losses	(10,838)	209,806
Investment securities gains—net	(335,333)	(683,661)
Foreign exchange gains—net	(351,120)	(21,699)
Equity in earnings of equity method investees—net	(216,085)	(140,420)
Provision for deferred income tax expense	140,264	198,187
Decrease (increase) in trading account assets, excluding foreign exchange contracts	1,354,468	(7,144)
Decrease in trading account liabilities, excluding foreign exchange contracts	(1,919,720)	(112,089)
Net decrease in collateral for derivative transactions	318,095	261,245
Decrease (increase) in cash collateral for the use of the Bank of Japan’s settlement infrastructure	74,838	(31,041)
Other—net	500,914	372,004
Net cash provided by operating activities	482,349	1,098,660
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)	49,664,247	43,946,970
Purchases of Available-for-sale debt securities (including purchases of debt securities under the fair value option)	(53,270,580)	(53,776,659)
Proceeds from maturities of Held-to-maturity debt securities	323,592	184,335
Purchases of Held-to-maturity debt securities	(456,091)	0
Proceeds from sales and redemption of Equity securities (including proceeds from equity securities under the fair value option)	1,104,787	748,314
Purchases of Equity securities (including purchases of equity securities under the fair value option)	(690,250)	(654,810)
Net decrease in loans	3,565,029	431,010
Net decrease in call loans, funds sold, and receivables under resale agreements and securities borrowing transactions	2,103,589	9,730,114
Capital expenditures for premises and equipment	(52,473)	(51,085)
Purchases of intangible assets	(132,040)	(122,369)
Proceeds from sales of consolidated VIEs and subsidiaries—net	8,497	(7,802)
Other—net	117,577	31,213
Net cash provided by investing activities	2,285,884	459,231
Cash flows from financing activities:
Net increase (decrease) in deposits	(240,823)	14,781,816
Net increase (decrease) in call money, funds purchased, and payables under repurchase agreements and securities lending transactions	204,096	(4,592,482)
Net decrease in due to trust account and other short-term borrowings	(111,665)	(4,003,713)
Proceeds from issuance of long-term debt	2,308,084	14,924,032
Repayments of long-term debt	(3,392,919)	(6,713,103)
Proceeds from sales of treasury stock	2,686	905
Dividends paid	(160,479)	(160,475)
Payments for acquisition of treasury stock	(8,507)	(6)
Other—net	174,193	(266,385)
Net cash provided by (used in) financing activities	(1,225,334)	13,970,589
Effect of exchange rate changes on cash and cash equivalents	255,995	(162,497)
Net increase in cash and cash equivalents	1,798,894	15,365,983
Cash and cash equivalents at beginning of period	103,328,790	78,555,591
Cash, due from banks and interest-earning deposits in other banks	103,610,992	93,918,086
Restricted cash included in other assets	1,316	3,488
Cash and cash equivalents reclassified as assets held for sale and included in other assets (Note 2)	1,515,376	0
Cash and cash equivalents at end of period	105,127,684	93,921,574
Cash paid during the period for:
Interest	298,794	518,169
Income taxes, net of refunds	94,460	2,749
Non-cash investing and financing activities:
Assets acquired under finance lease arrangements	1,231	1,380
Assets acquired under operating lease arrangements	35,475	18,170
Assets reclassified, excluding cash and cash equivalents	10,193,119	0
Liabilities reclassified	¥ 10,874,609	¥ 0

Basis of Semiannual Condensed C

Basis of Semiannual Condensed Consolidated Financial Statements	6 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Semiannual Condensed Consolidated Financial Statements	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 for more information by business segment. 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 (“VIEs”) (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, 2021. Certain information that would be included in annual financial statements but is not required for semiannual reporting purposes under U.S. GAAP has been omitted or condensed. Use of Estimates

Business Developments

Business Developments	6 Months Ended
	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Business Developments	BUSINESS DEVELOPMENTS Agreement to Sell MUFG Union Bank and Invest in Shares of U.S. Bancorp In September 2021, the MUFG Group agreed to the sale of all shares in MUFG Union Bank, N.A. （”MUFG Union Bank"), the wholly-owned primary operating subsidiary in the United States, to U.S. Bancorp. The businesses of MUFG Union Bank that the MUFG group will transfer to U.S. Bancorp exclude the Global Corporate & Investment Banking ("GCIB") business, the Global Markets business to the extent related to the GCIB business and certain assets and liabilities etc. that are part of shared middle and back office functions etc. Under a legal agreement, the assets and liabilities of these operations will be transferred to other entities within MUFG before it sells the shares of MUFG Union Bank. The transaction value is expected to be approximately $17.6 billion consisting of $8.0 billion of consideration to be paid by U.S. Bancorp in the form of $5.5 billion in cash and 44,374,155 shares of U.S. Bancorp and $9.6 billion of capital to be distributed through a dividend or share repurchase by MUFG Union Bank prior to the closing of the transaction. The MUFG group expects to own approximately 2.9% of U.S. Bancorp’s outstanding shares immediately after the transaction. The closing of the transaction is expected to occur in the first half of calendar year 2022, subject to certain conditions, including the approval from relevant regulators. Through this transaction, the MUFG group aims to maximize shareholder value by improving the capital efficiency. The assets and liabilities of MUFG Union Bank, which will be transferred to U.S. Bancorp, were reclassified as held for sale, and included in Other assets and Other liabilities in the accompanying condensed consolidated balance sheets at September 30, 2021. Assets and liabilities reclassified as held for sale at September 30, 2021 are shown below: At September 30, 2021 (in millions) Assets held for sale: Interest-earning deposits in other banks ¥ 1,288,478 Investment securities 3,127,206 Loans, net of allowance for credit losses 6,359,733 Other 933,078 Total ¥ 11,708,495 Liabilities held for sale: Deposits ¥ 9,933,030 Other 941,579 Total ¥ 10,874,609

Investment Securities

Investment Securities	6 Months Ended
	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	INVESTMENT SECURITIES The following tables present the amortized cost, gross unrealized gains and losses, and fair value of Available-for-sale debt securities and Held-to-maturity debt securities at March 31, 2021 and September 30, 2021: At March 31, 2021: Amortized cost Gross unrealized gains Gross unrealized losses Fair value (in millions) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 35,166,245 ¥ 147,844 ¥ 40,878 ¥ 35,273,211 Japanese prefectural and municipal bonds 3,719,205 15,123 2,815 3,731,513 Foreign government and official institution bonds 2,854,037 84,707 11,781 2,926,963 Corporate bonds 1,123,271 11,400 401 1,134,270 Residential mortgage-backed securities 1,459,062 9,119 1,051 1,467,130 Commercial mortgage-backed securities 435,975 29,502 912 464,565 Asset-backed securities 1,373,450 11,685 650 1,384,485 Other debt securities 168,528 3,780 730 171,578 Commercial paper 564,072 31 5 564,098 Total ¥ 46,863,845 ¥ 313,191 ¥ 59,223 ¥ 47,117,813 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 1,100,447 ¥ 23,033 ¥ — ¥ 1,123,480 Foreign government and official institution bonds 233,883 2,262 2,795 233,350 Residential mortgage-backed securities 411,024 18,590 — (1) 429,614 Commercial mortgage-backed securities 111,750 4,846 — (1) 116,596 Asset-backed securities 2,046,659 1,721 12,277 2,036,103 Total ¥ 3,903,763 ¥ 50,452 ¥ 15,072 ¥ 3,939,143 Note: (1) 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 other comprehensive income (loss)(“Accumulated OCI”) in the accompanying condensed consolidated balance sheets were ¥4,849 million and ¥1,920 million, respectively, at March 31, 2021 and are not included in the table above. At September 30, 2021: Amortized cost (3) Gross unrealized gains Gross unrealized losses Fair value (2) (in millions) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 36,114,443 ¥ 119,213 ¥ 18,657 ¥ 36,214,999 Japanese prefectural and municipal bonds 4,002,464 15,214 1,605 4,016,073 Foreign government and official institution bonds 3,343,700 68,416 19,856 3,392,260 Corporate bonds 1,077,930 11,631 236 1,089,325 Residential mortgage-backed securities 1,706,456 6,714 8,168 1,705,002 Commercial mortgage-backed securities 475,797 21,786 2,215 495,368 Asset-backed securities 1,387,750 15,158 179 1,402,729 Other debt securities 169,413 8,305 639 177,079 Commercial paper 872,096 46 22 872,120 Total ¥ 49,150,049 ¥ 266,483 ¥ 51,577 ¥ 49,364,955 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 1,100,384 ¥ 19,116 ¥ — ¥ 1,119,500 Foreign government and official institution bonds 444,070 1,875 9,731 436,214 Residential mortgage-backed securities 309,905 13,136 — (1) 323,041 Commercial mortgage-backed securities 104,015 3,480 — (1) 107,495 Asset-backed securities 2,171,222 15,718 1,531 2,185,409 Total ¥ 4,129,596 ¥ 53,325 ¥ 11,262 ¥ 4,171,659 Notes: (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 ¥3,732 million and ¥1,549 million, respectively, at September 30, 2021 and are not included in the table above. (2) Fair value amounts in the above table include those relating to Available-for-sale debt securities of ¥2,265,674 million and Held-to-maturity debt securities of ¥866,751 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. (3) Amortized cost amounts in the above table include those relating to Held-to-maturity debt securities of ¥857,990 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Contractual Maturities The amortized cost and fair values of Held-to-maturity debt securities and the fair values of Available-for-sale debt securities at September 30, 2021 by contractual maturity are shown below. Expected maturities may be shorter than contractual maturities because issuers of debt securities may have the right to call or prepay obligations with or without penalties. Debt securities not due at a single maturity date and securities embedded with call or prepayment options, such as mortgage-backed securities, are included in the table below based on their contractual maturities. Held-to-maturity debt securities Available-for-sale debt securities Amortized cost (2) Fair value (1) Fair value (1) (in millions) Due in one year or less ¥ 33,628 ¥ 34,077 ¥ 26,058,777 Due from one year to five years 1,151,974 1,172,776 9,517,496 Due from five years to ten years 1,287,456 1,295,231 7,723,907 Due after ten years 1,656,538 1,669,575 6,064,775 Total ¥ 4,129,596 ¥ 4,171,659 ¥ 49,364,955 Notes: (1) Fair value amounts in the above table include those relating to Available-for-sale debt securities of ¥2,265,674 million and Held-to-maturity debt securities of ¥866,751 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. (2) Amortized cost amounts in the above table include those relating to Held-to-maturity debt securities of ¥857,990 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Realized Gains and Losses For the six months ended September 30, 2020 and 2021, gross realized gains on sales of Available-for-sale debt securities were ¥23,566 million and ¥61,902 million, respectively, and gross realized losses on sales of Available-for-sale debt securities were ¥22,621 million and ¥18,169 million, respectively. Impairment Losses on Investment Securities For the six months ended September 30, 2020 and 2021, impairment losses on Available-for-sale debt securities, which mainly comprised of corporate bonds, were included in Investment securities gains—net in the accompanying condensed consolidated statements of income and were not material. For the six months ended September 30, 2020 and 2021, the MUFG Group’s Held-to-maturity debt securities were explicitly or implicitly guaranteed by Japanese or U.S. government entities or agencies and had a long history of no credit losses or were rated investment grade. Therefore, no credit losses were expected on these securities. Gross Unrealized Losses and Fair Value The following tables show the gross unrealized losses and fair value of Available-for-sale debt securities at March 31, 2021 and September 30, 2021 by length of time that individual securities in each category have been in a continuous loss position: Less than 12 months 12 months or more Total At March 31, 2021: Fair value Gross Fair value Gross Fair value Gross Number of securities (in millions, except number of securities) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 12,098,437 ¥ 31,055 ¥ 429,235 ¥ 9,823 ¥ 12,527,672 ¥ 40,878 286 Japanese prefectural and municipal bonds 870,007 1,584 276,172 1,231 1,146,179 2,815 405 Foreign government and official institution bonds 429,204 11,768 50,478 13 479,682 11,781 71 Corporate bonds 96,582 166 229,518 235 326,100 401 120 Residential mortgage-backed securities 378,351 577 139,214 474 517,565 1,051 218 Commercial mortgage-backed securities 36,633 905 2,616 7 39,249 912 21 Asset-backed securities 190,795 394 49,428 256 240,223 650 89 Other debt securities 22,812 91 22,388 639 45,200 730 17 Commercial paper 116,016 5 — — 116,016 5 8 Total ¥ 14,238,837 ¥ 46,545 ¥ 1,199,049 ¥ 12,678 ¥ 15,437,886 ¥ 59,223 1,235 Less than 12 months 12 months or more Total At September 30, 2021: Fair value Gross Fair value Gross Fair value (1) Gross Number of (in millions, except number of securities) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥24,712,396 ¥ 13,802 ¥ 390,498 ¥ 4,855 ¥ 25,102,894 ¥ 18,657 240 Japanese prefectural and municipal bonds 1,004,671 1,543 32,551 62 1,037,222 1,605 389 Foreign government and official institution bonds 1,010,780 19,776 68,312 80 1,079,092 19,856 158 Corporate bonds 145,240 117 121,171 119 266,411 236 98 Residential mortgage-backed securities 802,616 7,591 180,689 577 983,305 8,168 231 Commercial mortgage-backed securities 71,423 1,961 5,680 254 77,103 2,215 36 Asset-backed securities 108,457 74 13,441 105 121,898 179 42 Other debt securities 27,910 74 18,354 565 46,264 639 17 Commercial paper 424,053 22 — — 424,053 22 28 Total ¥ 28,307,546 ¥ 44,960 ¥ 830,696 ¥ 6,617 ¥ 29,138,242 ¥ 51,577 1,239 Note: (1) Fair value amounts of a continuous loss position in the above table include those relating to Available-for-sale debt securities of ¥1,056,529 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Evaluating Available-for-sale Debt Securities for Impairment Losses The following describes the nature of the MUFG Group’s Available-for-sale debt securities and the conclusions reached in determining whether impairment losses exist. Japanese national government and Japanese government agency bonds, Foreign government and official institution bonds As of September 30, 2021, 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, 2021 and no impairment loss has been recorded. Corporate bonds As of September 30, 2021, unrealized losses associated with corporate bonds were primarily related to private placement bonds issued by Japanese non-public companies. The credit loss component recognized in earnings is identified as the amount of principal cash flows not expected to be received over the remaining terms of the bonds as estimated using the MUFG Group’s cash flow projections. The key assumptions include probability of default based on credit ratings of the bond issuers and loss given default. Residential mortgage-backed securities As of September 30, 2021, 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, 2021 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, 2021, unrealized losses on these securities were primarily driven by certain collateralized loan obligations (“CLOs”), highly illiquid securities for which fair values are difficult to determine. Unrealized losses arise from widening credit spreads, deterioration of the credit quality of the underlying collateral, uncertainty regarding the valuation of such securities and the market’s view of the performance of the fund managers. When the fair value of a security is lower than its amortized cost or when any security is subject to a deterioration in credit rating, the MUFG Group undertakes a cash flow analysis of the underlying collateral to estimate the 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, 2021 and no impairment loss has been recorded. Other debt securities As of September 30, 2021, unrealized losses on other debt securities 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, 2021. 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, 2020 and 2021. Six months ended 2020 2021 (in millions) Net gains recognized during the period (1) ¥ 683,303 ¥ 289,949 Less: Net gains (losses) recognized during the period on equity securities sold during the period 17,136 (1,913) Net unrealized gains recognized during the reporting period still held at the reporting date ¥ 666,167 ¥ 291,862 Note: (1) Included in Investment securities gains—net. Measurement Alternative of Equity Securities The following table presents the carrying value of nonmarketable equity securities that are measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes (“measurement alternative”), held at March 31, 2021 and September 30, 2021. March 31, September 30, (in millions) Measurement alternative balance ¥ 356,074 ¥ 363,991 The related adjustments for these securities during the six months ended September 30, 2020 and 2021 were as follows: Six months ended 2020 2021 (in millions) Measurement alternative impairment losses (1)(4) ¥ (2,984) ¥ (2,834) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ — ¥ — Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ 3,685 ¥ 1,075 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, 2021 and September 30, 2021 were ¥10,102 million and ¥12,591 million , respectively. (5) The cumulative downward changes for observable prices at March 31, 2021 and September 30, 2021 were ¥953 million and ¥953 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2021 and September 30, 2021 were ¥54,806 million and ¥53,600 million, respectively.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	6 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans and Allowance for Credit Losses	LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans at March 31, 2021 and September 30, 2021 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 ¥ 13,133,360 ¥ 12,529,819 Construction 763,958 692,467 Real estate 11,997,301 12,014,585 Services 2,908,975 2,735,763 Wholesale and retail 7,766,070 7,729,051 Banks and other financial institutions (1) 6,443,296 5,904,659 Communication and information services 1,407,738 1,336,456 Other industries 8,838,718 8,681,345 Consumer 15,066,986 14,826,762 Total domestic 68,326,402 66,450,907 Foreign: Governments and official institutions 655,367 640,035 Banks and other financial institutions (1) 10,649,029 11,703,363 Commercial and industrial 29,574,176 27,672,268 Other 6,822,771 6,617,255 Total foreign 47,701,343 46,632,921 Unearned income, unamortized premiums—net and deferred loan fees—net (308,882) (301,543) Less: Loans in transferred business of MUFG Union Bank (3) — (6,431,831) Total (2) ¥ 115,718,863 ¥ 106,350,454 Notes: (1) 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. (2) The above table includes loans held for sale of ¥353,095 million at March 31, 2021 and ¥325,921 million at September 30, 2021, respectively. (3) Represents loans in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. 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, 2021 for further information. Nonaccrual Loans Originated loans are generally placed on nonaccrual status when substantial doubt exists as to the full and timely collection of either principal or interest, when principal or interest is contractually past due one month or more with respect to loans within all classes of the Commercial segment, three months or more with respect to loans within the Card, MUFG Americas Holdings, and Krungsri segments, and six months or more with respect to loans within the Residential segment. See Note 1 to the consolidated financial statements for the fiscal year ended March 31, 2021 for further information. The information on nonaccrual loans by class at March 31, 2021 and September 30, 2021 are shown below: Recorded Loan Balance March 31, 2021: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 565,671 ¥ 111,141 Foreign 258,391 96,833 Residential 67,968 4,720 Card 60,200 — MUAH 73,706 30,242 Krungsri 161,338 3,042 Other 26,567 29 Total ¥ 1,213,841 ¥ 246,007 Recorded Loan Balance September 30, 2021: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 541,779 ¥ 110,425 Foreign 246,097 88,415 Residential 61,314 5,144 Card 61,723 — MUAH 75,344 30,864 Krungsri 157,215 1,861 Other 28,018 — Total ¥ 1,171,490 ¥ 236,709 Notes: (1) Nonaccrual loans in the above table do not include loans held for sale of ¥8,562 million and ¥14,832 million at March 31, 2021 and September 30, 2021, respectively. These loans include loans in transferred business of MUFG Union Bank of ¥55,035 million at September 30, 2021. See Note 2 for more information. (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 held for sale of ¥8,562 million and ¥14,832 million at March 31, 2021 and September 30, 2021, respectively, are not included in nonaccrual loans not requiring an allowance for credit losses. These loans include loans in transferred business of MUFG Union Bank of ¥30,864 million at September 30, 2021. See Note 2 for more information. The following table shows information regarding recognized interest income on nonaccrual loans for the six months ended September 30, 2020 and 2021: September 30, 2020 September 30, 2021 (in millions) Commercial Domestic ¥ 2,229 ¥ 2,004 Foreign 2,061 2,301 Residential 488 422 Card 20 13 MUAH 483 377 Krungsri 3,498 2,950 Other 3,153 1,922 Total ¥ 11,932 ¥ 9,989 Troubled Debt Restructurings The following table summarizes the MUFG Group’s TDRs by class for the six months ended September 30, 2020 and 2021: Six months ended September 30, 2020: Troubled Debt Restructurings Troubled Debt Restructurings that Subsequently Defaulted Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Recorded Investment (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 Six months ended September 30, 2021: Troubled Debt Restructurings Troubled Debt Restructurings that Subsequently Defaulted Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Recorded Investment (in millions) Commercial (1)(3) Domestic ¥ 94,584 ¥ 93,578 ¥ 7,048 Foreign 529 529 8,447 Residential (1)(3) 13,707 13,707 117 Card (2)(3) 11,485 10,877 1,269 MUAH (2)(3)(4) 14,233 14,243 258 Krungsri (2)(3) 8,135 8,135 2,104 Other (2) 5,104 5,104 1,641 Total ¥ 147,777 ¥ 146,173 ¥ 20,884 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, 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. For the six months ended September 30, 2021, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment. (4) The above table includes the loans in transferred business of MUFG Union Bank at September 30, 2021. See Note 2 for more information. 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 outstanding recorded investment and post-modification outstanding recorded investment may differ due to write-offs made as part of the concession. The impact of write-offs associated with TDRs on the MUFG Group’s results of operations for the six months ended September 30, 2020 and 2021 was not material. 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 non-accruing 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, where COVID-19 related modifications were granted to loans that were current as of December 31, 2019, based on the Coronavirus Aid, Relief, and Economic Security Act, or where COVID-19 related short-term modifications (i.e., six months or less) were granted to loans that were current as of the loan modification date, based on interagency statements issued by the U.S. federal bank regulatory agencies. These loan modifications were primarily payment deferrals, and the related borrowers’ past due and nonaccrual status will not be impacted during the deferral period. Interest income will continue to be recognized over the contractual life of the loan. In the Krungsri segment, TDR accounting was suspended for loan modifications, where COVID-19 related short-term modifications (i.e., six months or less) were granted to loans that were current as of the loan modification date, based on interagency statements issued by the U.S. federal bank regulatory agencies. These loan modifications included payment deferrals and reductions in stated rate, and the related borrowers’ past due and nonaccrual status will not be impacted during the deferral period. Interest income will continue to be recognized over the contractual life of the loan. Credit Quality Indicator Credit quality indicators of loans and fiscal year of origination by class at March 31, 2021 and September 30, 2021 are shown below: Term Loans Revolving Revolving Total (1) At March 31, 2021: 2020 2019 2018 2017 2016 Prior (in millions) Commercial: ¥ 29,805,641 ¥ 10,256,709 ¥ 9,410,172 ¥ 5,360,221 ¥ 4,736,515 ¥ 6,945,092 ¥ 19,401,336 ¥ 9,776 ¥ 85,925,462 Domestic 22,402,694 6,392,946 6,126,746 3,840,964 3,649,145 5,286,408 6,934,308 — 54,633,211 Normal 21,936,776 6,058,126 5,915,318 3,666,734 3,551,332 4,847,597 6,604,586 — 52,580,469 Close Watch 431,223 319,073 195,630 162,176 74,698 317,622 306,236 — 1,806,658 Likely to become Bankrupt or Legally/Virtually Bankrupt 34,695 15,747 15,798 12,054 23,115 121,189 23,486 — 246,084 Foreign 7,402,947 3,863,763 3,283,426 1,519,257 1,087,370 1,658,684 12,467,028 9,776 31,292,251 Normal 7,158,793 3,704,240 3,155,261 1,423,064 1,032,052 1,534,943 12,231,018 9,776 30,249,147 Close Watch 200,305 118,027 91,867 60,422 51,433 69,436 197,405 — 788,895 Likely to become Bankrupt or Legally/Virtually Bankrupt 43,849 41,496 36,298 35,771 3,885 54,305 38,605 — 254,209 Residential ¥ 623,328 ¥ 847,314 ¥ 822,883 ¥ 892,166 ¥ 1,304,110 ¥ 8,660,022 ¥ 32,984 ¥ 8 ¥ 13,182,815 Accrual 623,035 846,787 822,411 891,407 1,302,427 8,599,621 30,897 — 13,116,585 Nonaccrual 293 527 472 759 1,683 60,401 2,087 8 66,230 Card ¥ 14 ¥ 96 ¥ 171 ¥ 304 ¥ 110 ¥ 513 ¥ 417,804 ¥ 60,284 ¥ 479,296 Accrual 1 10 13 19 7 79 404,301 14,666 419,096 Nonaccrual 13 86 158 285 103 434 13,503 45,618 60,200 MUAH ¥ 1,406,996 ¥ 1,366,930 ¥ 915,570 ¥ 861,742 ¥ 770,568 ¥ 1,291,561 ¥ 1,882,377 ¥ — ¥ 8,495,744 Credit Quality Based on the Number of Delinquencies Accrual 472,892 608,580 324,369 552,380 516,051 656,087 130,514 — ¥ 3,260,873 Nonaccrual — 725 518 1,139 1,035 14,801 828 — 19,046 Credit Quality Based on Internal Credit Ratings Pass 920,959 707,841 486,354 287,316 236,715 542,634 1,625,799 — 4,807,618 Special Mention 4,865 31,361 49,784 14,904 9,522 30,015 76,487 — 216,938 Classified 8,280 18,423 54,545 6,003 7,245 48,024 48,749 — 191,269 Krungsri ¥ 1,316,031 ¥ 1,197,815 ¥ 958,241 ¥ 506,919 ¥ 285,427 ¥ 402,752 ¥ 1,922,946 ¥ 14,514 ¥ 6,604,645 Performing 1,251,246 1,086,710 855,915 434,818 241,811 314,114 1,754,840 — 5,939,454 Under-Performing 52,821 85,408 74,848 57,314 31,886 57,129 144,447 — 503,853 Non-Performing 11,964 25,697 27,478 14,787 11,730 31,509 23,659 14,514 161,338 Other ¥ 338,342 ¥ 164,650 ¥ 84,115 ¥ 37,394 ¥ 11,030 ¥ 8,538 ¥ 342,619 ¥ — ¥ 986,688 Accrual 335,830 159,363 79,608 35,366 10,556 8,201 331,197 — 960,121 Nonaccrual 2,512 5,287 4,507 2,028 474 337 11,422 — 26,567 Term Loans Revolving Revolving Total (1) At September 30, 2021: 2021 2020 2019 2018 2017 Prior (in millions) Commercial: ¥ 18,453,877 ¥ 14,031,765 ¥ 8,729,077 ¥ 7,934,655 ¥ 4,617,515 ¥ 10,141,926 ¥ 19,085,841 ¥ 3,618 ¥ 82,998,274 Domestic 13,682,280 9,706,901 5,701,452 5,531,710 3,431,971 8,069,620 6,836,453 — 52,960,387 Normal 13,476,976 9,379,217 5,374,910 5,347,194 3,288,990 7,592,772 6,511,649 — 50,971,708 Close Watch 187,910 303,221 311,227 172,855 128,990 348,587 302,139 — 1,754,929 Likely to become Bankrupt or Legally/Virtually Bankrupt 17,394 24,463 15,315 11,661 13,991 128,261 22,665 — 233,750 Foreign 4,771,597 4,324,864 3,027,625 2,402,945 1,185,544 2,072,306 12,249,388 3,618 30,037,887 Normal 4,629,791 4,176,598 2,943,456 2,301,257 1,102,141 1,948,945 12,074,150 3,618 29,179,956 Close Watch 109,375 104,006 68,176 72,739 48,437 72,635 140,307 — 615,675 Likely to become Bankrupt or Legally/Virtually Bankrupt 32,431 44,260 15,993 28,949 34,966 50,726 34,931 — 242,256 Residential ¥ 341,196 ¥ 607,300 ¥ 825,437 ¥ 798,135 ¥ 862,156 ¥ 9,504,401 ¥ 30,350 ¥ 8 ¥ 12,968,983 Accrual 341,125 607,036 824,939 797,610 861,322 9,448,841 28,306 — 12,909,179 Nonaccrual 71 264 498 525 834 55,560 2,044 8 59,804 Card ¥ 1 ¥ 75 ¥ 149 ¥ 188 ¥ 299 ¥ 520 ¥ 404,682 ¥ 62,406 ¥ 468,320 Accrual — 4 10 11 16 55 391,619 14,882 406,597 Nonaccrual 1 71 139 177 283 465 13,063 47,524 61,723 MUAH ¥ 957,613 ¥ 1,218,450 ¥ 1,192,906 ¥ 795,520 ¥ 715,342 ¥ 1,761,857 ¥ 2,060,216 ¥ — ¥ 8,701,904 Credit Quality Based on the Number of Delinquencies Accrual 521,772 439,777 437,123 225,583 410,915 942,916 120,864 — 3,098,950 Nonaccrual — — 332 332 995 14,265 663 — 16,587 Credit Quality Based on Internal Credit Ratings Pass 428,211 758,437 707,238 483,020 286,292 736,337 1,853,100 — 5,252,635 Special Mention 442 5,087 31,847 25,655 14,597 13,491 58,829 — 149,948 Classified 7,188 15,149 16,366 60,930 2,543 54,848 26,760 — 183,784 Krungsri ¥ 640,591 ¥ 1,115,181 ¥ 1,041,784 ¥ 834,107 ¥ 398,161 ¥ 572,795 ¥ 1,950,932 ¥ 15,320 ¥ 6,568,871 Performing 616,680 1,034,730 918,713 724,790 328,519 443,815 1,780,963 — 5,848,210 Under-Performing 20,246 64,569 97,874 84,307 56,641 90,904 148,905 — 563,446 Non-Performing 3,665 15,882 25,197 25,010 13,001 38,076 21,064 15,320 157,215 Other ¥ 248,301 ¥ 191,687 ¥ 121,279 ¥ 58,672 ¥ 28,283 ¥ 19,768 ¥ 329,934 ¥ — ¥ 997,924 Accrual 248,155 181,373 118,153 56,396 27,053 18,866 319,911 — 969,907 Nonaccrual 146 10,314 3,126 2,276 1,230 902 10,023 — 28,017 Note: (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. These loans include loans in transferred business of MUFG Union Bank of ¥6,378,200 million at September 30, 2021. See Note 2 for more information. 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, 2021. For the Commercial, Residential and Card segments, credit quality indicators at March 31, 2021 and September 30, 2021 are based on information as of March 31, 2021 and September 30, 2021, respectively. For the MUFG Americas Holdings, Krungsri and Other segments, credit quality indicators at March 31, 2021 and September 30, 2021 are generally based on information as of December 31, 2020 and June 30, 2021, respectively. Past Due Analysis Ages of past due loans by class at March 31, 2021 and September 30, 2021 are shown below: At March 31, 2021: 1-3 months Greater Total Current Total Loans (1) 90 Days and (in millions) Commercial Domestic ¥ 4,763 ¥ 22,996 ¥ 27,759 ¥ 54,605,452 ¥ 54,633,211 ¥ 4,673 Foreign 7,302 22,473 29,775 31,262,476 31,292,251 91 Residential 39,577 28,375 67,952 13,114,863 13,182,815 11,150 Card 2,127 26,786 28,913 450,383 479,296 — MUAH 42,082 29,337 71,419 8,424,325 8,495,744 4,626 Krungsri 131,573 127,533 259,106 6,345,539 6,604,645 — Other 21,776 24,201 45,977 940,711 986,688 — Total ¥ 249,200 ¥ 281,701 ¥ 530,901 ¥ 115,143,749 ¥ 115,674,650 ¥ 20,540 At September 30, 2021: 1-3 months Greater Total Current Total Loans (1) 90 Days and (in millions) Commercial Domestic ¥ 8,314 ¥ 10,101 ¥ 18,415 ¥ 52,941,972 ¥ 52,960,387 ¥ 3,956 Foreign 9,966 15,288 25,254 30,012,633 30,037,887 — Residential 36,733 17,456 54,189 12,914,794 12,968,983 4,899 Card 2,330 27,037 29,367 438,953 468,320 — MUAH 46,954 19,925 66,879 8,635,025 8,701,904 3,202 Krungsri 130,628 121,735 252,363 6,316,508 6,568,871 — Other 23,232 21,867 45,099 952,825 997,924 — Total ¥ 258,157 ¥ 233,409 ¥ 491,566 ¥ 112,212,710 ¥ 112,704,276 ¥ 12,057 Note: (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. These loans include loans in transferred business of MUFG Union Bank of ¥6,378,200 million at September 30, 2021. See Note 2 for more information. Allowance for Credit Losses Changes in the allowance for credit losses of loans by portfolio segment for the six months ended September 30, 2020 and 2021 are shown below: 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 (1) 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 (2) (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 Six months ended September 30, 2021: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 734,577 ¥ 82,893 ¥ 44,217 ¥ 131,755 ¥ 293,396 ¥ 61,553 ¥ 1,348,391 Provision for (reversal of) credit losses (36,415) (6,943) 7,595 (38,568) 42,836 20,657 (10,838) Charge-offs 36,033 1,399 8,704 9,459 46,405 30,040 132,040 Recoveries collected 6,360 10 691 3,335 11,741 5,593 27,730 Net charge-offs 29,673 1,389 8,013 6,124 34,664 24,447 104,310 Less: Loans in transferred business of MUFG Union Bank (3) — — — (72,098) — — (72,098) Other (2) (17) — — 7,815 (141) 2,656 10,313 Balance at end of period ¥ 668,472 ¥ 74,561 ¥ 43,799 ¥ 22,780 ¥ 301,427 ¥ 60,419 ¥ 1,171,458 Notes: (1) See Note 1 to the consolidated financial statements for the fiscal year ended March 31, 2021 for more information. (2) Other is principally comprised of gains or losses from foreign exchange translation. (3) Represents allowance for credit losses relating to loans in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. The MUFG Group sold ¥613 billion and ¥850 billion of loans within the Commercial segment during the six months ended September 30, 2020 and 2021, respectively. The MUFG Group sold ¥519 billion of loans within the MUFG Americas Holdings segment during the six months ended September 30, 2021. 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, 2021, for the Commercial, MUFG Americas Holdings, Krungsri and Other segments, collateral relating to these loans comprised primarily of real estate, and to a lesser extent, exchange traded equity securities and deposits, etc. For the Residential segment, collateral on these loans was mainly real estate. Other Financial Receivable Accounts receivable-Other, which is included in Other assets in the accompanying condensed consolidated balance sheets, amounted to ¥1,162,424 million and ¥1,040,049 million as of March 31, 2021 and September 30, 2021, respectively, and 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 expense on the condensed consolidated statements of income. The receivables relating to card business included ¥4,980 million of past due receivables (1-3 months past due receivables of ¥2,252 million and greater than 3 months past due receivables of ¥2,728 million) as of March 31, 2021, and ¥5,172 million of past due receivables (1-3 months past due receivables of ¥2,279 million and greater than 3 months past due receivables of ¥2,893 million) as of September 30, 2021, respectively. The credit quality for these receivables is primarily evaluated based on the extent of past due. The outstanding balance of these account receivables are presented on a net basis after allowance for credit losses. The change of allowance for credit losses during the six months ended September 30, 2020 and 2021 is primarily due to provision or reversal of the allowance for the receivables. There are de minimis or zero expected credit losses, for example, for lending and financing transactions, such as Interest-earning deposits in other banks, Call loans and funds sold, Receivables under resale agreements and Receivables under securities borrowing transactions because the term is short and the credit quality of the borrowers is normal. Accrued interest receivable totaled ¥259,336 million and ¥223,222 million as of March 31, 2021 and September 30, 2021, respectively, and is included in Other assets on the condensed consolidated balance sheets.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	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, 2020 and 2021: Six months ended 2020 2021 (in millions) Balance at beginning of period Goodwill (1) ¥ 1,093,554 ¥ 1,094,344 Accumulated impairment losses (1) (575,928) (723,492) 517,626 370,852 Goodwill acquired during the six months 3,990 — Impairment loss (106,479) — Foreign currency translation adjustments and other (10,128) 19,329 Balance at end of period Goodwill 1,087,416 1,113,673 Accumulated impairment losses (682,407) (723,492) Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank (2) ¥ — ¥ (90,123) ¥ 405,009 ¥ 300,058 Notes: (1) Goodwill originally recognized of ¥1,900,019 million, which has been fully impaired before April 1, 2020, is not included in the table above. (2) Represents goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Notes 2 for more information. The impairment losses on goodwill for the six months ended September 30, 2020 were ¥106,479 million and relating to the MUAH reporting unit. Due to the economic environment triggered by COVID-19, cash flow projections for reporting units were lowered. This economic environment led management to believe that the fair values of a certain reporting unit was below carrying value. As a result, the fair value of the reporting unit was measured on June 30, 2020 for the quantitative goodwill impairment test, and led to impairment of goodwill with the fair value fallen below the carrying amount of the reporting unit. The MUFG Group estimated the fair value of its reporting units using a combination of the income and the market approaches. This goodwill impairment includes the impact of an intervening event due to the economic environment triggered by COVID-19 for the three-month period ended March 31, 2020. See Note 6 to the consolidated financial statements for the fiscal year ended March 31, 2021 for further information. Other Intangible Assets The table below presents the net carrying amount by major class of other intangible assets at March 31, 2021 and September 30, 2021: March 31, September 30, (in millions) Intangible assets subject to amortization: Software ¥ 776,429 ¥ 788,935 Customer relationships 265,155 258,860 Core deposit intangibles 62,021 59,393 Trade names 50,793 49,388 Other 10,496 10,396 Total 1,164,894 1,166,972 Intangible assets not subject to amortization: Other (1) 20,100 20,571 Less: Intangible assets in transferred business of MUFG Union Bank (2) — (38,004) Total ¥ 1,184,994 ¥ 1,149,539 Notes: (1) Intangible assets not subject to amortization includes mortgage servicing rights accounted for at fair value of ¥11,355 million and ¥12,053 million at March 31, 2021 and September 30, 2021, respectively. (2) Represents intangible assets in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.

Lease Transactions

Lease Transactions	6 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Lease Transactions	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. Sales type and direct 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, 2020 and September 30, 2021: September 30, September 30, (in millions) Sales type and direct financing leases: Finance income on net investment ¥ 64,748 ¥ 59,369 Operating leases: Lease income ¥ 2,025 ¥ 1,843 Total ¥ 66,773 ¥ 61,212 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	6 Months Ended
	Sep. 30, 2021
Financial Instruments Pledged as Collateral [Abstract]
Pledged Assets and Collateral	PLEDGED ASSETS AND COLLATERAL At September 30, 2021, assets mortgaged, pledged, or otherwise subject to lien were as follows: September 30, 2021 (1) (in millions) Trading account securities ¥ 12,101,156 Investment securities 18,996,743 Loans 12,287,113 Other 22,129 Total ¥ 43,407,141 Note: (1) The above table includes pledged assets of ¥860,646 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. The above pledged assets were classified by type of liabilities to which they related as follows: September 30, 2021 (1) (in millions) Deposits ¥ 244,149 Payables under repurchase agreements and securities lending transactions 14,867,093 Other short-term borrowings and long-term debt 28,266,550 Other 29,349 Total ¥ 43,407,141 Note: (1) The above table includes liabilities amounts to which pledged assets of ¥860,646 million in transferred business of MUFG Union Bank relate at September 30, 2021. See Note 2 for more information. At September 30, 2021, certain investment securities, principally Japanese national government and Japanese government agency bonds, loans and other assets with a combined carrying value of ¥21,272,299 million, including assets held for sale relating to transferred business of MUFG Union Bank, 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 sheet securitizations. These securitizations of mortgage and apartment loans, which do not qualify for sales treatment, are accounted for as secured borrowings. The amount of loans in the table above represents the carrying amount of these transactions with the carrying amount of the associated liabilities included in Other short-term borrowings and Long-term debt. At March 31, 2021 and September 30, 2021, the cash collateral pledged for derivative transactions, which is included in Other assets, was ¥2,005,136 million and ¥1,586,822 million, respectively, and the cash collateral received for derivative transactions, which is included in Other liabilities, was ¥909,641 million and ¥882,610 million, respectively. At September 30, 2021, the amounts of cash collateral pledged for derivative transactions included ¥29,362 million of collateral,which was reclassified to assets held for sale in Other assets relating to transferred business of MUFG Union Bank.

Severance Indemnities and Pensi

Severance Indemnities and Pension Plans	6 Months Ended
	Sep. 30, 2021
Retirement Benefits [Abstract]
Severance Indemnities and Pension Plans	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, 2020 and 2021: Six months ended September 30, Domestic subsidiaries Foreign offices and subsidiaries 2020 2021 2020 2021 Pension benefits and SIPs Pension benefits and SIPs Pension benefits Other benefits Pension benefits Other benefits (in millions) Service cost—benefits earned during the period ¥ 23,695 ¥ 22,196 ¥ 7,354 ¥ 117 ¥ 9,276 ¥ 100 Interest cost on projected benefit obligation 5,596 6,081 7,255 402 5,575 264 Expected return on plan assets (35,577) (41,132) (15,785) (1,072) (16,254) (1,182) Amortization of net actuarial loss 8,547 137 8,158 125 3,215 73 Amortization of prior service cost (602) (629) (1,309) (226) (1,343) (189) Gain on settlements and curtailment (1,084) (2,632) — — — — Net periodic benefit cost (income) ¥ 575 ¥ (15,979) ¥ 5,673 ¥ (654) ¥ 469 ¥ (934)

Offsetting of Derivatives, Repu

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions	6 Months Ended
	Sep. 30, 2021
Offsetting [Abstract]
Offsetting of Derivatives Repurchase Agreements and Securities Lending Disclosure	OFFSETTING OF DERIVATIVES, REPURCHASE AGREEMENTS, AND SECURITIES LENDING TRANSACTIONSThe following tables present, as of March 31, 2021 and September 30, 2021, 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 Gross amounts offset in the condensed consolidated balance sheet Net amounts presented in the condensed consolidated balance sheet Gross amounts not offset in the condensed consolidated balance sheet Net amounts At March 31, 2021: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 11,997 ¥ — ¥ 11,997 ¥ (8,628) ¥ (605) ¥ 2,764 Receivables under resale agreements 16,053 (2,273) 13,780 (12,687) (37) 1,056 Receivables under securities borrowing transactions 3,370 — 3,370 (3,289) — 81 Total ¥ 31,420 ¥ (2,273) ¥ 29,147 ¥ (24,604) ¥ (642) ¥ 3,901 Financial liabilities: Derivative liabilities ¥ 11,714 ¥ — ¥ 11,714 ¥ (8,545) ¥ (1,624) ¥ 1,545 Payables under repurchase agreements 26,800 (2,232) 24,568 (23,835) (60) 673 Payables under securities lending transactions 843 — 843 (814) (2) 27 Obligations to return securities received as collateral 6,582 — 6,582 (1,931) — 4,651 Total ¥ 45,939 ¥ (2,232) ¥ 43,707 ¥ (35,125) ¥ (1,686) ¥ 6,896 Gross Gross amounts offset in the condensed consolidated balance sheet Net amounts presented in the condensed consolidated balance sheet (1) Gross amounts not offset in the condensed consolidated balance sheet Net amounts At September 30, 2021: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 9,932 ¥ — ¥ 9,932 ¥ (7,041) ¥ (564) ¥ 2,327 Receivables under resale agreements 14,333 (2,262) 12,071 (11,418) (24) 629 Receivables under securities borrowing transactions 3,542 (76) 3,466 (3,392) — 74 Total ¥ 27,807 ¥ (2,338) ¥ 25,469 ¥ (21,851) ¥ (588) ¥ 3,030 Financial liabilities: Derivative liabilities ¥ 9,426 ¥ — ¥ 9,426 ¥ (6,999) ¥ (1,207) ¥ 1,220 Payables under repurchase agreements 27,720 (2,231) 25,489 (24,685) (101) 703 Payables under securities lending transactions 910 (76) 834 (813) — 21 Obligations to return securities received as collateral 5,975 — 5,975 (1,494) — 4,481 Total ¥ 44,031 ¥ (2,307) ¥ 41,724 ¥ (33,991) ¥ (1,308) ¥ 6,425 Note: (1) Net amounts presented in the condensed consolidated balance sheet in the above table include Derivative assets of ¥87 billion and Derivative liabilities of ¥17 billion in transferred business of MUFG Union Bank, which is included in Other assets and Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.

Repurchase Agreements and Secur

Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings	6 Months Ended
	Sep. 30, 2021
Disclosure of Repurchase Agreements [Abstract]
Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings	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, 2021 and September 30, 2021. 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, 2021 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 6,006 ¥ 16,888 ¥ 1,973 ¥ 1,933 ¥ 26,800 Payables under securities lending transactions 789 26 28 — 843 Obligations to return securities received as collateral 5,607 278 528 169 6,582 Total ¥ 12,402 ¥ 17,192 ¥ 2,529 ¥ 2,102 ¥ 34,225 September 30, 2021 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 11,260 ¥ 12,161 ¥ 2,444 ¥ 1,855 ¥ 27,720 Payables under securities lending transactions 779 — 64 67 910 Obligations to return securities received as collateral 5,485 195 143 152 5,975 Total ¥ 17,524 ¥ 12,356 ¥ 2,651 ¥ 2,074 ¥ 34,605 Secured borrowing by the class of collateral pledged at March 31, 2021 and September 30, 2021 was as follows: March 31, 2021 Payables under repurchase agreements Payables under securities lending transactions Obligations to return securities received as collateral Total (in billions) Japanese national government and Japanese government agency bonds ¥ 7,754 ¥ 104 ¥ 4,022 ¥ 11,880 Foreign government and official institution bonds 13,914 17 738 14,669 Corporate bonds 702 1 214 917 Residential mortgage-backed securities 3,729 — — 3,729 Other debt securities 218 — 5 223 Marketable equity securities 462 721 1,603 2,786 Other 21 — — 21 Total ¥ 26,800 ¥ 843 ¥ 6,582 ¥ 34,225 September 30, 2021 Payables under repurchase agreements Payables under securities lending transactions Obligations to return securities received as collateral Total (in billions) Japanese national government and Japanese government agency bonds ¥ 7,362 ¥ 44 ¥ 3,384 ¥ 10,790 Foreign government and official institution bonds 14,171 17 794 14,982 Corporate bonds 712 67 260 1,039 Residential mortgage-backed securities 4,747 — — 4,747 Other debt securities 245 — 1 246 Marketable equity securities 444 776 1,527 2,747 Other 39 6 9 54 Total ¥ 27,720 ¥ 910 ¥ 5,975 ¥ 34,605

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	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, 2020 and 2021: Six months ended 2020 2021 (in millions) Accumulated other comprehensive income(loss), net of taxes: Net unrealized gains (losses) on investment securities: Balance at beginning of period ¥ (344,785) ¥ (383,004) Net change during the period 54,116 (28,028) Effect of adopting new guidance on measurement of credit losses on financial instruments 34 — Balance at end of period ¥ (290,635) ¥ (411,032) Net debt valuation adjustments: Balance at beginning of period ¥ 45,502 ¥ (37,862) Net change during the period (59,324) 5,965 Balance at end of period ¥ (13,822) ¥ (31,897) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Balance at beginning of period ¥ (13,343) ¥ 19,029 Net change during the period 38,130 (5,750) Balance at end of period ¥ 24,787 ¥ 13,279 Defined benefit plans: Balance at beginning of period ¥ (337,918) ¥ (20,382) Net change during the period 27,625 (9,681) Balance at end of period ¥ (310,293) ¥ (30,063) Foreign currency translation adjustments: Balance at beginning of period ¥ 230,127 ¥ 132,738 Net change during the period (184,264) 245,484 Balance at end of period ¥ 45,863 ¥ 378,222 Balance at end of period ¥ (544,100) ¥ (81,491) 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, 2020 and 2021: Six months ended September 30, 2020 2021 Before tax Tax (expense) or benefit Net of tax Before tax Tax (expense) or benefit Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities ¥ 83,444 ¥ (21,968) ¥ 61,476 ¥ 19,768 ¥ (3,871) ¥ 15,897 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (1,055) (238) (1,293) (43,792) 13,390 (30,402) Net change 82,389 (22,206) 60,183 (24,024) 9,519 (14,505) Net unrealized gains on investment securities attributable to noncontrolling interests 6,067 13,523 Net unrealized gains (losses) on investment securities attributable to Mitsubishi UFJ Financial Group 54,116 (28,028) Net debt valuation adjustments: Net debt valuation adjustments (85,613) 26,214 (59,399) 8,270 (2,533) 5,737 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 108 (33) 75 329 (101) 228 Net change (85,505) 26,181 (59,324) 8,599 (2,634) 5,965 Net debt valuation adjustments attributable to noncontrolling interests — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group (59,324) 5,965 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains (losses) on derivatives qualifying for cash flow hedges 51,002 (14,013) 36,989 (1,034) 515 (519) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 1,388 (371) 1,017 (6,748) 1,691 (5,057) Net change 52,390 (14,384) 38,006 (7,782) 2,206 (5,576) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to noncontrolling interests (124) 174 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group 38,130 (5,750) Defined benefit plans: Defined benefit plans 26,092 (8,070) 18,022 (12,034) 3,385 (8,649) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 13,617 (3,871) 9,746 (1,442) 798 (644) Net change 39,709 (11,941) 27,768 (13,476) 4,183 (9,293) Defined benefit plans attributable to noncontrolling interests 143 388 Defined benefit plans attributable to Mitsubishi UFJ Financial Group 27,625 (9,681) Foreign currency translation adjustments: Foreign currency translation adjustments (214,725) 19,531 (195,194) 262,860 (13,271) 249,589 Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 797 (245) 552 1,462 (448) 1,014 Net change (213,928) 19,286 (194,642) 264,322 (13,719) 250,603 Foreign currency translation adjustments attributable to noncontrolling interests (10,378) 5,119 Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (184,264) 245,484 Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group ¥ (123,717) ¥ 207,990 The following table presents the effect of the reclassification of significant items out of Accumulated OCI on the respective line items of the accompanying condensed consolidated statements of income for the six months ended September 30, 2020 and 2021: Six months ended 2020 2021 Details of Accumulated OCI components Amount reclassified out of Accumulated OCI 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 debt securities ¥ (1,005) ¥ (43,692) Investment securities gains—net Other (50) (100) (1,055) (43,792) Total before tax (238) 13,390 Income tax expense ¥ (1,293) ¥ (30,402) Net of tax Net debt valuation adjustments ¥ 108 ¥ 329 Equity in earnings of equity method investees—net 108 329 Total before tax (33) (101) Income tax expense ¥ 75 ¥ 228 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ 1,236 ¥ (5,589) Interest income on Loans, including fees Foreign exchange contracts 152 (1,159) Interest expense on Long-term debt or Foreign exchange losses (gains)—net 1,388 (6,748) Total before tax (371) 1,691 Income tax expense ¥ 1,017 ¥ (5,057) Net of tax Defined benefit plans Net actuarial loss (1) ¥ 16,830 ¥ 3,425 Other non-interest expenses Prior service cost (1) (2,137) (2,161) Other non-interest expenses Gain on settlements and curtailment, and other (1) (1,076) (2,706) Other non-interest expenses 13,617 (1,442) Total before tax (3,871) 798 Income tax expense ¥ 9,746 ¥ (644) Net of tax Foreign currency translation adjustments ¥ 715 ¥ 1,462 Other non-interest income 82 — Other non-interest expenses 797 1,462 Total before tax (245) (448) Income tax expense ¥ 552 ¥ 1,014 Net of tax Total reclassifications for the period ¥ 14,855 ¥ (50,191) Total before tax (4,758) 15,330 Income tax expense ¥ 10,097 ¥ (34,861) 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	6 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	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, 2021 for a further discussion of the MUFG Group’s use of derivative instruments. During the six months ended September 30, 2021, 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 the London Interbank Offered Rate (“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 ¥1,105.8 billion at June 30, 2021, which included those relating to transferred business of MUFG Union Bank, to hedge the risk of changes in cash flows attributable to changes in the designated interest rates from variable rate loans. At June 30, 2021, the weighted average remaining life of the active cash flow hedges was 2.4 years. For cash flow hedges, changes in the fair value of the hedging instruments are reported as a component of OCI and reclassified into earnings in the same period or periods during which the hedged cash flows are recognized in net interest income. At June 30, 2021, MUFG Americas Holdings expects to reclassify approximately ¥11.4 billion of income from Accumulated OCI as an increase to net interest income during the twelve months ending June 30, 2022. This amount could differ from amounts actually realized due to changes in interest rates, hedge terminations and the addition of other hedges subsequent to June 30, 2021. Notional Amounts of Derivative Contracts The following table summarizes the notional amounts of derivative contracts at March 31, 2021 and September 30, 2021: Notional amounts (1) March 31, September 30, 2021 (2) (in trillions) Interest rate contracts ¥ 1,308.4 ¥ 1,254.2 Foreign exchange contracts 222.0 219.8 Equity contracts 8.0 7.7 Commodity contracts 0.1 0.1 Credit derivatives 9.8 9.1 Other 3.5 3.4 Total ¥ 1,551.8 ¥ 1,494.3 Notes: (1) Includes both written and purchased positions. (2) Notional amounts in this table include those relating to transferred business of MUFG Union Bank. See Note 2 for more information. Impact of Derivatives on the Condensed Consolidated Balance Sheets The following table summarizes fair value information on derivative instruments that are recorded on the MUFG Group’s condensed consolidated balance sheets at March 31, 2021 and September 30, 2021: Fair value of derivative instruments March 31, 2021 (1)(5) September 30, 2021 (1)(5) Not designated as hedges (2) Designated as hedges (3) Total derivatives (4) Not designated as hedges (2) Designated as hedges (3) Total derivatives (4) (7) (in billions) Derivative assets: Interest rate contracts ¥ 7,718 ¥ — ¥ 7,718 ¥ 6,430 ¥ — ¥ 6,430 Foreign exchange contracts 3,910 — 3,910 3,153 1 3,154 Equity contracts 231 — 231 216 — 216 Commodity contracts 27 — 27 24 — 24 Credit derivatives 94 — 94 95 — 95 Other (6) 17 — 17 13 — 13 Total derivative assets ¥ 11,997 ¥ — ¥ 11,997 ¥ 9,931 ¥ 1 ¥ 9,932 Derivative liabilities: Interest rate contracts ¥ 7,361 ¥ — ¥ 7,361 ¥ 6,138 ¥ — ¥ 6,138 Foreign exchange contracts 4,022 5 4,027 2,948 2 2,950 Equity contracts 237 — 237 238 — 238 Commodity contracts 27 — 27 24 — 24 Credit derivatives 109 — 109 116 — 116 Other (6) (47) — (47) (40) — (40) Total derivative liabilities ¥ 11,709 ¥ 5 ¥ 11,714 ¥ 9,424 ¥ 2 ¥ 9,426 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 liabilities except for (6). (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, 2021. (6) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, Deposits and Long-term debt. (7) This table includes Derivative assets of ¥87 billion and Derivative liabilities of ¥17 billion in transferred business of MUFG Union Bank, which is included in Other assets and Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Impact of Derivatives on the Condensed Consolidated Statements of Income The following table provides more detailed information regarding the derivative-related impact on the accompanying condensed consolidated statements of income for the six months ended September 30, 2020 and 2021: Trading and risk management derivatives gains and losses (Not designated as hedging instruments) Foreign exchange gains (losses)—net Trading account profits (losses)—net Total (in billions) 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 (1) 9 (94) (85) Total ¥ 83 ¥ 7 ¥ 90 Six months ended September 30, 2021: Interest rate contracts ¥ — ¥ 25 ¥ 25 Foreign exchange contracts — — — Equity contracts — (115) (115) Credit derivatives — (35) (35) Other (1) (7) (22) (29) Total ¥ (7) ¥ (147) ¥ (154) Note: (1) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, Deposits and Long-term debt. 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, 2021 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, 2021 and September 30, 2021: Protection sold Maximum potential/Notional amount by expiration period Fair value At March 31, 2021: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 294,312 ¥ 2,235,390 ¥ 715,896 ¥ 3,245,598 ¥ (67,707) Non-investment grade 84,780 311,702 59,145 455,627 5,284 Not rated — 1,683 — 1,683 (83) Total 379,092 2,548,775 775,041 3,702,908 (62,506) Index and basket credit default swaps : Investment grade (2) 43,000 470,063 29,133 542,196 (4,753) Non-investment grade 35,427 65,319 — 100,746 (1,165) Not rated 59,534 29,971 852 90,357 (919) Total 137,961 565,353 29,985 733,299 (6,837) Total credit default swaps sold 517,053 3,114,128 805,026 4,436,207 (69,343) Other credit derivatives sold (3) : Investment grade (2) — 16,606 — 16,606 57 Total credit derivatives ¥ 517,053 ¥ 3,130,734 ¥ 805,026 ¥ 4,452,813 ¥ (69,286) Protection sold Maximum potential/Notional amount by expiration period Fair value At September 30, 2021: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 337,188 ¥ 1,914,711 ¥ 824,940 ¥ 3,076,839 ¥ (70,434) Non-investment grade 70,181 367,213 68,119 505,513 3,242 Not rated — — — — — Total 407,369 2,281,924 893,059 3,582,352 (67,192) Index and basket credit default swaps : Investment grade (2) 33,000 266,662 20,727 320,389 (5,843) Non-investment grade 50,364 39,172 — 89,536 (712) Not rated 57,470 46,579 894 104,943 (1,171) Total 140,834 352,413 21,621 514,868 (7,726) Total credit default swaps sold 548,203 2,634,337 914,680 4,097,220 (74,917) Other credit derivatives sold (3) : Investment grade (2) — 16,788 — 16,788 87 Total credit derivatives ¥ 548,203 ¥ 2,651,125 ¥ 914,680 ¥ 4,114,008 ¥ (74,830) 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- or higher to meet the definition of investment grade. (3) Other credit derivatives primarily consist of guarantees for exposures held by the counterparty under interest rate swaps and other types of derivative contracts. 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 ¥66 billion and ¥4,097 billion, respectively, at March 31, 2021, and approximately ¥70 billion and ¥3,751 billion, respectively, at September 30, 2021. Collateral is held by the MUFG Group in relation to these instruments. Collateral requirements are determined at the counterparty level and cover numerous transactions and products as opposed to individual contracts. Credit Risk, Liquidity Risk and Credit-risk-related Contingent Features Certain derivative instruments held by the MUFG Group contain provisions that require the MUFG Group’s debt to maintain an investment grade credit rating from each of the major credit rating agencies. If the MUFG Group’s debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request payments on early termination or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position at March 31, 2021 and September 30, 2021 was approximately ¥0.7 trillion and ¥0.6 trillion, respectively, for which the MUFG Group has posted collateral of approximately ¥227 billion and ¥145 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 ¥63 billion and ¥92 billion, respectively, as of March 31, 2021 and ¥56 billion and ¥76 billion, respectively, as of September 30, 2021.

Obligations Under Guarantees an

Obligations Under Guarantees and Other Off-balance Sheet Instruments	6 Months Ended
	Sep. 30, 2021
Guarantee Obligations And Other Off Balance Sheet Instruments [Abstract]
Obligations Under Guarantees and Other Off-balance Sheet Instruments	OBLIGATIONS UNDER GUARANTEES AND OTHER OFF-BALANCE SHEET INSTRUMENTS Obligations under Guarantees The MUFG Group provides customers with a variety of guarantees and similar arrangements as described in Note 24 to the consolidated financial statements for the fiscal year ended March 31, 2021. The table below presents the contractual or notional amounts of such guarantees at March 31, 2021 and September 30, 2021: March 31, September 30, 2021 (3) (in billions) Standby letters of credit and financial guarantees ¥ 4,055 ¥ 4,245 Performance guarantees 3,193 3,350 Derivative instruments (1)(2) 38,499 40,425 Liabilities of trust accounts 10,656 10,411 Other 40 34 Total ¥ 56,443 ¥ 58,465 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. (3) The above table includes the credit instruments in transferred business of MUFG Union Bank at September 30.2021. See Note 2 for more informatioion. 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, 2021 and September 30, 2021. The determination of the maximum potential future payments is based on the notional amount of the guarantees without consideration of possible recoveries under recourse provisions or from collateral held or pledged. Such amounts do not represent the anticipated losses, if any, on these guarantees. At March 31, 2021: Maximum potential/ Contractual or Notional amount Amount by borrower grade Normal Close Watch (1) Likely to become Bankrupt or Legally/ Virtually Bankrupt (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 4,055 ¥ 3,929 ¥ 108 ¥ 15 ¥ 3 Performance guarantees 3,193 3,092 70 3 28 Total ¥ 7,248 ¥ 7,021 ¥ 178 ¥ 18 ¥ 31 At September 30, 2021: Maximum potential/ Contractual or Notional amount Amount by borrower grade Normal Close Watch (1) Likely to become Bankrupt or Legally/ Virtually Bankrupt (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 4,245 ¥ 4,104 ¥ 112 ¥ 25 ¥ 4 Performance guarantees 3,350 3,258 60 3 29 Total (2) ¥ 7,595 ¥ 7,362 ¥ 172 ¥ 28 ¥ 33 Notes: (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, 2021. (2) The above table includes the credit instruments in transferred business of MUFG Union Bank of September 30.2021. See Note 2 for more information. The guarantees the MUFG Group does not classify based upon internal credit ratings are described in Note 24 to the consolidated financial statements for the fiscal year ended March 31, 2021. Other Off-balance Sheet Instruments In addition to obligations under guarantees and similar arrangements set forth above, the MUFG Group issues other off-balance sheet instruments to meet the financial needs of its customers and for other purposes as described in Note 24 to the consolidated financial statements for the fiscal year ended March 31, 2021. The table below presents the contractual amounts with regard to such instruments at March 31, 2021 and September 30, 2021: March 31, September 30, 2021 (1) (in billions) Commitments to extend credit ¥ 84,614 ¥ 82,850 Commercial letters of credit 835 925 Commitments to make investments 281 290 Other — 1 Note: (1) The above table includes the credit instruments in transferred business of MUFG Union Bank at September 30.2021. See Note 2 for more information.

Contingent Liabilities

Contingent Liabilities	6 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	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 ¥24,943 million and ¥22,616 million as of March 31, 2021 and September 30, 2021, respectively. Provision (reversal) related to the allowance for the six months ended September 30, 2020 and 2021 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

Variable Interest Entities	6 Months Ended
	Sep. 30, 2021
Variable Interest Entities [Abstract]
Variable Interest Entities	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 25 to the consolidated financial statements for the fiscal year ended March 31, 2021 for further information about the MUFG Group’s involvements with VIEs. The following tables present the assets and liabilities of consolidated VIEs recorded on the accompanying condensed consolidated balance sheets at March 31, 2021 and September 30, 2021: Consolidated VIEs Consolidated assets At March 31, 2021: Total Cash and due from banks Interest-earning deposits in other banks Trading account assets Investment securities Loans All other assets (in millions) Asset-backed conduits ¥ 5,986,887 ¥ 109,439 ¥ 40,061 ¥ 5,433 ¥ 1,015,434 ¥ 4,800,221 ¥ 16,299 Investment funds 374,324 — 15,171 240,327 41,512 — 77,314 Special purpose entities created for structured financing 175,630 — 2,058 4,645 — 113,943 54,984 Repackaged instruments 281,331 3,179 — 73,914 118,199 85,782 257 Securitization of the MUFG Group’s assets 10,358,628 — 996 — — 10,339,273 18,359 Trust arrangements 9,029,390 — — 623,466 1,071,708 7,334,215 1 Other 43,320 323 3,826 17,108 — 4,660 17,403 Total consolidated assets before elimination 26,249,510 112,941 62,112 964,893 2,246,853 22,678,094 184,617 The amounts eliminated in consolidation (8,121,094) (110,243) (31,690) (5,892) (519,561) (7,430,166) (23,542) Total consolidated assets ¥ 18,128,416 ¥ 2,698 ¥ 30,422 ¥ 959,001 ¥ 1,727,292 ¥ 15,247,928 ¥ 161,075 Consolidated liabilities Total Deposits Other short-term borrowings Long-term debt All other liabilities (in millions) Asset-backed conduits ¥ 5,989,188 ¥ — ¥ 4,058,248 ¥ 1,461,043 ¥ 469,897 Investment funds 15,039 — — 5,831 9,208 Special purpose entities created for structured financing 97,226 — — 84,973 12,253 Repackaged instruments 284,795 — 21,343 195,987 67,465 Securitization of the MUFG Group’s assets 10,367,099 — 31,000 9,839,204 496,895 Trust arrangements 9,029,272 7,826,959 — — 1,202,313 Other 39,141 — 3,433 18,315 17,393 Total consolidated liabilities before elimination 25,821,760 7,826,959 4,114,024 11,605,353 2,275,424 The amounts eliminated in consolidation (14,679,458) — (2,422,978) (11,144,547) (1,111,933) The amount of liabilities with recourse to the general credit of the MUFG Group (10,547,483) (7,826,959) (1,657,447) (3,043) (1,060,034) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 594,819 ¥ — ¥ 33,599 ¥ 457,763 ¥ 103,457 Consolidated VIEs Consolidated assets At September 30, 2021: Total (1) Cash and due from banks Interest-earning deposits in other banks Trading account assets Investment securities Loans All other (in millions) Asset-backed conduits ¥ 5,536,898 ¥ 51,918 ¥ 32,902 ¥ 12,503 ¥ 838,831 ¥ 4,545,764 ¥ 54,980 Investment funds 450,215 — 17,325 290,036 46,045 — 96,809 Special purpose entities created for structured financing 174,914 — 1,298 5,211 — 119,756 48,649 Repackaged instruments 312,906 2,911 — 102,267 120,120 86,996 612 Securitization of the MUFG Group’s assets 11,019,456 — 996 — — 10,999,949 18,511 Trust arrangements 8,416,454 — — 653,599 1,213,296 6,549,558 1 Other 62,501 440 3,672 17,108 15,249 3,971 22,061 Total consolidated assets before elimination 25,973,344 55,269 56,193 1,080,724 2,233,541 22,305,994 241,623 The amounts eliminated in consolidation (7,287,803) (52,362) (25,130) (14,651) (512,502) (6,653,078) (30,080) Total consolidated assets ¥ 18,685,541 ¥ 2,907 ¥ 31,063 ¥ 1,066,073 ¥ 1,721,039 ¥ 15,652,916 ¥ 211,543 Consolidated liabilities Total (1) Deposits Other short-term borrowings Long-term debt All other (in millions) Asset-backed conduits ¥ 5,534,013 ¥ — ¥ 3,785,267 ¥ 1,310,723 ¥ 438,023 Investment funds 8,038 — — 5,868 2,170 Special purpose entities created for structured financing 93,042 — — 92,015 1,027 Repackaged instruments 313,556 — 21,107 221,026 71,423 Securitization of the MUFG Group’s assets 11,027,556 — 30,208 10,535,581 461,767 Trust arrangements 8,416,792 7,044,493 29,001 — 1,343,298 Other 58,591 — 2,796 34,560 21,235 Total consolidated liabilities before elimination 25,451,588 7,044,493 3,868,379 12,199,773 2,338,943 The amounts eliminated in consolidation (14,764,238) (2,050) (1,907,983) (11,781,009) (1,073,196) The amount of liabilities with recourse to the general credit of the MUFG Group (10,156,879) (7,042,443) (1,913,177) (3,247) (1,198,012) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 530,471 ¥ — ¥ 47,219 ¥ 415,517 ¥ 67,735 Note: (1) Consolidated VIEs in the above table include Consolidated assets of ¥8,183 million and Consolidated liabilities of ¥1,548 million in transferred business of MUFG Union Bank, which is included in Other assets and Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. 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 VIEs, the maximum exposure to loss resulting from the MUFG Group’s involvement with non-consolidated VIEs, and the assets and liabilities which relate to the MUFG’s variable interests in non-consolidated VIEs at March 31, 2021 and September 30, 2021: Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At March 31, 2021: Total assets Maximum exposure Total Trading account assets Investment securities Loans All other assets Total All other liabilities (in millions) Asset-backed conduits ¥ 25,491,847 ¥ 5,606,965 ¥ 4,211,342 ¥ 277 ¥ 1,598,992 ¥ 2,612,073 ¥ — ¥ — ¥ — Investment funds 102,840,486 2,646,071 2,288,210 538,190 501,434 1,213,179 35,407 114,911 114,911 Special purpose entities created for structured financing 38,771,947 4,409,839 3,254,145 476,784 25,234 2,745,441 6,686 10,447 10,447 Repackaged instruments 8,604,182 3,088,564 3,008,695 611,245 2,142,482 204,332 50,636 29,478 29,478 Other 65,455,861 3,039,135 2,176,775 198,144 — 1,915,912 62,719 24,732 24,732 Total ¥ 241,164,323 ¥ 18,790,574 ¥ 14,939,167 ¥ 1,824,640 ¥ 4,268,142 ¥ 8,690,937 ¥ 155,448 ¥ 179,568 ¥ 179,568 Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At September 30, 2021: Total assets Maximum exposure Total (1) Trading account assets Investment securities Loans All other Total All other liabilities (in millions) Asset-backed conduits ¥ 23,029,409 ¥ 5,402,493 ¥ 4,177,144 ¥ 171 ¥ 1,588,926 ¥ 2,588,047 ¥ — ¥ 33 ¥ 33 Investment funds 102,739,859 2,860,451 2,370,234 332,708 504,543 1,486,401 46,582 — — Special purpose entities created for structured financing 37,739,921 4,344,864 3,034,948 299,681 20,897 2,705,792 8,578 2,155 2,155 Repackaged instruments 8,857,947 3,120,016 3,053,769 468,240 2,259,704 273,258 52,567 — — Other 78,150,320 3,319,299 2,318,853 195,052 7,552 2,032,667 83,582 28,317 28,317 Total ¥ 250,517,456 ¥ 19,047,123 ¥ 14,954,948 ¥ 1,295,852 ¥ 4,381,622 ¥ 9,086,165 ¥ 191,309 ¥ 30,505 ¥ 30,505 Note: (1) Non-consolidated VIEs in the above table include On-balance sheet assets of ¥15,957 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Maximum exposure to loss on each type of entity is determined based on the carrying amount of any on-balance sheet assets and any off-balance sheet liabilities held, net of any recourse liabilities. Therefore, the maximum exposure to loss represents the maximum loss the MUFG Group could possibly incur at each balance sheet date and does not reflect the likelihood of such a loss being incurred. The difference between the amount of on-balance sheet assets and the maximum exposure to loss primarily comprises the remaining undrawn commitments.

Fees and Commissions Income

Fees and Commissions Income	6 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Fees and Commissions Income	FEES AND COMMISSIONS INCOME Disaggregation of Contract Revenue Details of fees and commissions income for the six months ended September 30, 2020 and 2021 are as follows: 2020 2021 (in millions) Fees and commissions on deposits ¥ 26,221 ¥ 25,847 Fees and commissions on remittances and transfers 82,125 83,029 Fees and commissions on foreign trading business 29,195 33,903 Fees and commissions on credit card business 96,131 99,738 Fees and commissions on security-related services 121,629 132,161 Fees and commissions on administration and management services for investment funds 106,186 145,660 Trust fees 61,003 66,120 Guarantee fees (1) 22,802 22,431 Insurance commissions 19,444 20,763 Fees and commissions on real estate business 13,917 20,392 Other fees and commissions (2) 121,119 148,021 Total ¥ 699,772 ¥ 798,065 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 financing related fees that are not within the scope of the guidance on revenue from contracts with customers. 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. The business segment information is derived from the internal management reporting system used by management to measure the performance of the MUFG Group’s business segments. In addition, the business segment information is primarily based on the financial information prepared in accordance with accounting principles generally accepted in Japan as adjusted in accordance with internal management accounting rules and practices. Further, the format and information as disclosed in Note 17 are not consistent with the accompanying condensed consolidated financial statements prepared on the basis of U.S. GAAP. For example, management does not use information on segments’ gross revenue to allocate resources and assess performance. The majority of fees and commissions on deposits are attributable to Digital Service Business Group (“DS”) and Global Commercial Banking Business Group (“GCB”) with no significant concentration in any particular segments. The business activities relevant to fees and commissions on remittances and transfers are attributable to DS, Retail & Commercial Banking Business Group (“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 DS, R&C, JCIB, GCIB, and GCB with no significant concentration in any particular segments. The business activities relevant to fees and commissions on credit card business are substantially attributable to DS. 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 DS, R&C, JCIB, and GCB with no significant concentration in any particular segments.

Business Segments

Business Segments	6 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Business Segments	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 seven business segments.—Digital Service, Retail & Commercial Banking, Japanese Corporate & Investment Banking, Global Commercial Banking, Asset Management & Investor Services, Global Corporate & Investment Banking, and Global Markets. The following is a brief explanation of the MUFG Group’s business segments: Digital Service Business Group —Covers digital-based non-face-to-face businesses servicing "mass-segment" customers, or retail customers and small and medium-sized enterprise customers, of Mitsubishi UFJ NICOS, other consumer financing company and MUFG Bank in Japan. Retail & Commercial Banking Business Group —Covers the domestic retail and commercial banking businesses. This business group mainly offers retail customers (with a strategic focus on high net-worth individual) and small and medium-sized enterprise customers in Japan an extensive array of commercial banking, trust banking and securities products and services. Japanese Corporate & Investment Banking Business Group —Covers the large Japanese corporate businesses. This business 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 Commercial Banking Business Group —Covers the retail and commercial banking businesses of MUFG Union Bank, Krungsri and Bank Danamon. This business group offers a comprehensive array of financial products and services such as loans, deposits, fund transfers, investments and asset management services for local retail, small and medium-sized enterprise, and corporate customers across the Asia-Pacific region. Asset Management & Investor Services Business Group —Covers the asset management and asset administration businesses of Mitsubishi UFJ Trust and Banking, MUFG Bank and First Sentier Investors. By integrating the trust banking expertise of Mitsubishi UFJ Trust and Banking and the global strengths of MUFG Bank, the business group offers a full range of asset management and administration services for corporations and pension funds, including pension fund management and administration, advice on pension structures, and payments to beneficiaries, and also offer investment trusts for retail customers. Global Corporate & Investment Banking Business Group —Covers the global corporate, investment and transaction banking businesses of MUFG Bank and Mitsubishi UFJ Securities Holdings. Through a global network of offices and branches, this business group provides non-Japanese large corporate and financial institution customers outside Japan with a comprehensive set of solutions that meet their increasingly diverse and sophisticated financing needs. Global Markets Business Group —Covers the customer business and the treasury operations of MUFG Bank, Mitsubishi UFJ Trust and Banking and Mitsubishi UFJ Securities Holdings. The customer business includes sales and trading in fixed income instruments, currencies, equities and other investment products as well as origination and distribution of financial products. The treasury operations include asset and liability management as well as global investments for the MUFG Group. Other —Consists mainly of the corporate centers of MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking and Mitsubishi UFJ Morgan Stanley Securities. The elimination of duplicated amounts of net revenues among business segments is also reflected in 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 has reorganized its business groups (previously consisting of Retail & Commercial Banking Business Group, Japanese Corporate & Investment Banking Business Group, Global Corporate & Investment Banking Business Group, Global Commercial Banking Business Group, Asset Management & Investor Services Business Group, Global Markets Business Group and Other) under its three-year medium-term business plan commencing on April 1, 2021, in light of changes in the business environment, including the digital shift in society. A new Digital Service Business Group was established on April 1, 2021 under the medium-term business plan mainly by separating the digital-based businesses that previsously belonged to the Retail & Commercial Banking Business Group in an effort to better integrate the expertise and capabilities of its subsidiaries to respond to the need of its customers more effectively and efficiently, and the MUFG Group changed its reporting segments to the current segmentation based on the reorganized business groups. The MUFG Group has changed the method of allocation of net revenue and operating expenses among reporting segments mainly in connection with the establishment of the Digital Service Business Group. In addition, the MUFG Group made modifications to its internal management accounting rules and practices, effective April 1, 2021, including adjustments relating to the interest rate on core deposits in the Retail & Commercial Banking Business Group under the medium-term business plan. The adjustments resulted in a decrease in net revenue in the Retail & Commercial Banking Business Group and a corresponding, offsetting increase of the same amount in net revenue in Other. These changes had the following impact on its previously reported business segment information for the six months ended September 30, 2020: • increasing the operating profits of Other, the Global Corporate & Investment Banking Business Group, the Global Commercial Banking Business Group and the Global Markets Business Group by ¥6.5 billion, ¥2.4 billion, ¥0.9 billion and ¥0.9 billion, respectively, and • reducing the operating profits of the Retail & Commercial Banking Business Group, the Asset Management & Investor Services Business Group and the Japanese Corporate & Investment Banking Business Group by ¥104.6 billion, ¥1.3 billion and ¥0.6 billion, respectively. Prior period business segment information has been restated to enable comparison between the relevant amounts for six months ended September 30, 2020 and 2021. Customer Business Digital Retail & Japanese Global Asset Global Total Global Other Total (in billions) Six months ended September 30, 2020: Net revenue: ¥ 365.4 ¥ 251.9 ¥ 252.2 ¥ 415.4 ¥ 138.2 ¥ 199.6 ¥ 1,622.7 ¥ 464.8 ¥ 8.6 ¥ 2,096.1 BK and TB (1) : 128.7 168.8 199.3 0.5 46.8 120.4 664.5 344.8 37.7 1,047.0 Net interest income 113.3 81.9 81.0 0.6 2.2 60.7 339.7 104.7 44.3 488.7 Net fees 14.1 78.7 95.7 — 44.7 67.5 300.7 1.4 (29.4) 272.7 Other 1.3 8.2 22.6 (0.1) (0.1) (7.8) 24.1 238.7 22.8 285.6 Other than BK and TB 236.7 83.1 52.9 414.9 91.4 79.2 958.2 120.0 (29.1) 1,049.1 Operating expenses 271.9 247.4 155.5 263.5 102.9 131.5 1,172.7 114.7 75.6 1,363.0 Operating profit (loss) ¥ 93.5 ¥ 4.5 ¥ 96.7 ¥ 151.9 ¥ 35.3 ¥ 68.1 ¥ 450.0 ¥ 350.1 ¥ (67.0) ¥ 733.1 Six months ended September 30, 2021: Net revenue: ¥ 364.5 ¥ 287.5 ¥ 264.7 ¥ 376.8 ¥ 176.1 ¥ 231.5 ¥ 1,701.1 ¥ 280.8 ¥ 31.6 ¥ 2,013.5 BK and TB (1) : 133.2 181.5 205.8 0.9 52.7 155.8 729.9 192.1 72.6 994.6 Net interest income 110.0 82.1 96.0 0.9 4.1 73.1 366.2 127.7 88.4 582.3 Net fees 20.2 90.0 87.3 — 48.6 82.3 328.4 (4.5) (31.3) 292.6 Other 3.0 9.4 22.5 — — 0.4 35.3 68.9 15.5 119.7 Other than BK and TB 231.3 106.0 58.9 375.9 123.4 75.7 971.2 88.7 (41.0) 1,018.9 Operating expenses 276.2 247.8 156.3 267.2 118.4 139.2 1,205.1 118.2 56.1 1,379.4 Operating profit (loss) ¥ 88.3 ¥ 39.7 ¥ 108.4 ¥ 109.6 ¥ 57.7 ¥ 92.3 ¥ 496.0 ¥ 162.6 ¥ (24.5) ¥ 634.1 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, 2020 and 2021 above to income before income tax expense shown in the accompanying condensed consolidated statements of income is as follows: Six months ended 2020 2021 (in billions) Operating profit ¥ 733 ¥ 634 Reversal of (Provision for) credit losses (210) 11 Foreign exchange gains (losses)—net 87 (46) Trading account profits —net 83 4 Equity investment securities gains—net 694 289 Debt investment securities losses—net (204) (24) Equity in earnings of equity method investees—net 140 216 Impairment of goodwill (106) — Reversal of off-balance sheet credit instruments 37 6 Other—net (108) (39) Income before income tax expense ¥ 1,146 ¥ 1,051

Fair Value

Fair Value	6 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value	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, 2021. During the six months ended September 30, 2021, 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, 2021 and September 30, 2021: At March 31, 2021 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 18,439,146 ¥ 13,165,127 ¥ 756,413 ¥ 32,360,686 Debt securities Japanese national government and Japanese government agency bonds 6,800,379 401,454 — 7,201,833 Japanese prefectural and municipal bonds — 193,936 — 193,936 Foreign government and official institution bonds 9,508,030 450,443 1,280 9,959,753 Corporate bonds 5,123 2,706,611 77 2,711,811 Residential mortgage-backed securities 27 6,166,313 1,000 6,167,340 Asset-backed securities — 1,045,706 336,811 1,382,517 Other debt securities — — 277,635 277,635 Commercial paper — 1,001,233 — 1,001,233 Equity securities (2) 2,125,587 1,199,431 139,610 3,464,628 Trading derivative assets 136,515 11,774,865 70,058 11,981,438 Interest rate contracts 23,906 7,673,031 21,018 7,717,955 Foreign exchange contracts 929 3,896,713 12,520 3,910,162 Equity contracts 111,680 113,586 6,309 231,575 Commodity contracts — 1 26,896 26,897 Credit derivatives — 91,534 2,354 93,888 Other (7) — — 961 961 Investment securities: Available-for-sale debt securities 34,010,613 12,817,584 289,616 47,117,813 Japanese national government and Japanese government agency bonds 32,073,409 3,199,802 — 35,273,211 Japanese prefectural and municipal bonds — 3,731,513 — 3,731,513 Foreign government and official institution bonds 1,937,204 973,041 16,718 2,926,963 Corporate bonds — 1,134,108 162 1,134,270 Residential mortgage-backed securities — 1,467,115 15 1,467,130 Commercial mortgage-backed securities — 462,966 1,599 464,565 Asset-backed securities — 1,247,565 136,920 1,384,485 Other debt securities — 37,376 134,202 171,578 Commercial paper — 564,098 — 564,098 Equity securities 5,530,077 229,415 45,569 5,805,061 Marketable equity securities 5,530,077 229,415 — 5,759,492 Nonmarketable equity securities (3) — — 45,569 45,569 Other (4) 1,202,230 42,687 18,784 1,263,701 Total ¥ 59,318,581 ¥ 38,029,678 ¥ 1,180,440 ¥ 98,528,699 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 260,149 ¥ 989 ¥ — ¥ 261,138 Trading derivative liabilities 150,750 11,560,634 45,031 11,756,415 Interest rate contracts 10,696 7,343,594 6,839 7,361,129 Foreign exchange contracts 977 4,015,927 5,237 4,022,141 Equity contracts 139,077 92,655 5,686 237,418 Commodity contracts — 1 26,959 26,960 Credit derivatives — 108,457 83 108,540 Other (7) — — 227 227 Obligation to return securities received as collateral (5) 6,484,452 97,307 — 6,581,759 Other (6) — 558,553 (2,212) 556,341 Total ¥ 6,895,351 ¥ 12,217,483 ¥ 42,819 ¥ 19,155,653 At September 30, 2021 Level 1 Level 2 Level 3 Fair Value (8) (in millions) Assets Trading account assets: Trading securities (1) ¥ 19,693,104 ¥ 14,976,853 ¥ 699,598 ¥ 35,369,555 Debt securities Japanese national government and Japanese government agency bonds 7,271,079 342,429 — 7,613,508 Japanese prefectural and municipal bonds — 136,983 — 136,983 Foreign government and official institution bonds 10,285,602 424,816 1,433 10,711,851 Corporate bonds 4,222 2,830,826 683 2,835,731 Residential mortgage-backed securities — 7,788,583 — 7,788,583 Asset-backed securities — 1,118,202 256,014 1,374,216 Other debt securities — — 279,952 279,952 Commercial paper — 1,237,124 — 1,237,124 Equity securities (2) 2,132,201 1,097,890 161,516 3,391,607 Trading derivative assets 143,235 9,707,756 67,846 9,918,837 Interest rate contracts 26,988 6,375,295 27,717 6,430,000 Foreign exchange contracts 2,136 3,145,866 5,341 3,153,343 Equity contracts 114,111 93,698 8,138 215,947 Commodity contracts — — 23,642 23,642 Credit derivatives — 92,897 2,323 95,220 Other (7) — — 685 685 Investment securities: Available-for-sale debt securities 34,410,091 14,679,359 275,505 49,364,955 Japanese national government and Japanese government agency bonds 32,188,385 4,026,614 — 36,214,999 Japanese prefectural and municipal bonds — 4,016,073 — 4,016,073 Foreign government and official institution bonds 2,221,706 1,153,086 17,468 3,392,260 Corporate bonds — 1,086,177 3,148 1,089,325 Residential mortgage-backed securities — 1,704,987 15 1,705,002 Commercial mortgage-backed securities — 494,189 1,179 495,368 Asset-backed securities — 1,285,923 116,806 1,402,729 Other debt securities — 40,190 136,889 177,079 Commercial Paper — 872,120 — 872,120 Equity securities 5,640,412 196,343 50,150 5,886,905 Marketable equity securities 5,640,412 196,343 — 5,836,755 Nonmarketable equity securities (3) — — 50,150 50,150 Other (4) 830,251 21,922 15,544 867,717 Total ¥ 60,717,093 ¥ 39,582,233 ¥ 1,108,643 ¥ 101,407,969 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 73,815 ¥ 5,453 ¥ — ¥ 79,268 Trading derivative liabilities 142,480 9,283,194 39,370 9,465,044 Interest rate contracts 10,020 6,122,010 6,129 6,138,159 Foreign exchange contracts 981 2,944,304 3,143 2,948,428 Equity contracts 131,479 100,806 5,995 238,280 Commodity contracts — — 23,695 23,695 Credit derivatives — 116,074 88 116,162 Other (7) — — 320 320 Obligation to return securities received as collateral (5) 5,869,080 105,722 — 5,974,802 Other (6) — 491,802 3,576 495,378 Total ¥ 6,085,375 ¥ 9,886,171 ¥ 42,946 ¥ 16,014,492 Notes: (1) Includes securities measured under the fair value option. (2) Excludes certain investments valued at net asset value of private equity funds whose fair values at March 31, 2021 were ¥102,255 million and those at September 30, 2021 were ¥135,905 million, respectively. The amounts of unfunded commitments related to these private equity funds at March 31, 2021 were ¥97,413 million, and those at September 30, 2021 were ¥84,769 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, 2021. (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, 2021 were ¥27,395 million and ¥34,390 million respectively, and those at September 30, 2021 were ¥27,726 million and ¥38,207 million respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2021 were ¥1,006 million and ¥4,758 millions, respectively, and those at September 30, 2021 were ¥1,023 million and ¥8,927 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, 2021. (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) Includes certain derivatives such as earthquake derivatives. (8) Fair value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Trading derivative assets of ¥86,916 million, Available-for-sale debt securities of ¥2,265,674 million, Equity securities of ¥2,733 million and Other of ¥12,053 million, which are included in Other assets, and Trading derivative liabilities of ¥17,250 million, which are included in Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Changes in Level 3 Recurring Fair Value Measurements The following tables present a reconciliation of the assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the six months ended September 30, 2020 and 2021. The determination to classify a financial instrument within Level 3 is based upon the significance of the unobservable inputs to overall fair value measurement. However, Level 3 financial instruments typically include, in addition to the unobservable or Level 3 input, observable inputs (inputs that are actively quoted and can be validated to external sources). Accordingly, the gains and losses in the tables below include changes in fair value due in part to observable inputs used in the valuation techniques. Total gains (losses) Change in unrealized gains (losses) for assets and liabilities still held at September 30, 2020 March 31, 2020 Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2020 (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 debt securities 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) Total gains (losses) Change in unrealized gains(losses) for assets and liabilities still held at September 30, 2021 March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2021 (10) (in millions) Assets Trading account assets: Trading securities (1) ¥ 756,413 ¥ 4,592 (2) ¥ — ¥ 268,583 ¥ — ¥ (71,430) ¥ (259,220) ¥ 660 ¥ — ¥ 699,598 ¥ 4,423 (2) Debt securities Foreign government and official institution bonds 1,280 210 — 28,427 — (28,469) (15) — — 1,433 (16) Corporate bonds 77 (69) — 125 — (100) — 650 — 683 (69) Residential mortgage-backed securities 1,000 (2) — 41,844 — (42,823) (19) — — — — Asset-backed securities 336,811 4,193 — 166,760 — — (251,750) — — 256,014 5,297 Other debt securities 277,635 2,317 — — — — — — — 279,952 2,317 Equity securities 139,610 (2,057) — 31,427 — (38) (7,436) 10 — 161,516 (3,106) Trading derivatives—net 25,027 17,711 (2) 1,113 36 (355) — (9,069) (463) (5,524) 28,476 15,161 (2) Interest rate contracts—net 14,179 3,916 653 — — — 2,634 8 198 21,588 3,764 Foreign exchange contracts—net 7,283 302 147 21 — — 773 (471) (5,857) 2,198 369 Equity contracts—net 623 13,378 319 15 — — (12,327) — 135 2,143 10,907 Commodity contracts—net (63) 16 (6) — — — — — — (53) 16 Credit derivatives—net 2,271 113 — — — — (149) — — 2,235 113 Other—net (9) 734 (14) — — (355) — — — — 365 (8) Investment securities: Available-for-sale debt securities 289,616 (618) (3) 22,746 118,700 — — (170,482) 15,653 (110) 275,505 7,452 (3) Foreign government and official institution bonds 16,718 — 1,104 4,805 — — (5,159) — — 17,468 (30) Corporate bonds 162 (326) 68 557 — — (57) 2,854 (110) 3,148 (261) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 1,599 — 104 — — — (524) — — 1,179 9 Asset-backed securities 136,920 (292) 8,690 113,311 — — (141,823) — — 116,806 3,495 Other debt securities 134,202 — 12,780 27 — — (22,919) 12,799 (8) — 136,889 4,239 Equity securities 45,569 2,588 (3) — 3,602 — (1,317) — 130 (422) 50,150 1,614 (3) Nonmarketable equity securities 45,569 2,588 — 3,602 — (1,317) — 130 (422) 50,150 1,614 Other 18,784 (1,383) (7) 986 1,758 — (4,523) (57) — (21) 15,544 (1,382) (7) Total ¥ 1,135,409 ¥ 22,890 ¥ 24,845 ¥ 392,679 ¥ (355) ¥ (77,270) ¥ (438,828) ¥ 15,980 ¥ (6,077) ¥ 1,069,273 ¥ 27,268 Liabilities Other ¥ (2,212) ¥ (8,176) (4) ¥ (2,341) ¥ — ¥ 8,145 ¥ — ¥ (12,450) ¥ 6,809 (6) ¥ (7,233) (6) ¥ 3,576 ¥ (2,656) (4) Total ¥ (2,212) ¥ (8,176) ¥ (2,341) ¥ — ¥ 8,145 ¥ — ¥ (12,450) ¥ 6,809 ¥ (7,233) ¥ 3,576 ¥ (2,656) Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account profits—net and Foreign exchange gains—net. (3) Included in Investment securities gains—net and Other comprehensive income—net. (4) Included in Trading account profits—net. (5) 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 long-term debt 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 income. (8) Transfers relate to the reclassification of certain securities. (9) Includes certain derivatives such as earthquake derivatives. (10) Fair value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Available-for-sale debt securities of ¥67,266 million and Other of ¥12,053 million, which are included in Other assets, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Quantitative Information about Level 3 Fair Value Measurements The following tables present information on the valuation techniques, significant unobservable inputs and their ranges for each major category of assets and liabilities measured at fair value on a recurring basis and classified in Level 3: At March 31, 2021 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 16,718 Return on Equity Method Probability of default 0.2 % ~ 1.8 % 0.5 % Recovery rate 35.0 % ~ 90.0 % 66.9 % Market-required return on capital 8.0 % ~ 10.0 % 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 89,607 Discounted cash flow Probability of default 4.3 % ~ 4.9 % 4.7 % Recovery rate 78.0 % ~ 96.6 % 90.6 % 279,547 Internal model (4) Asset Correlations 3.0% 3.0 % Discount factor 1.3 % ~ 1.6 % 1.3 % Prepayment rate 18.3% 18.3 % Probability of default 0.0 % ~ 83.7 % — (3) Recovery rate 57.4% 57.4 % Other debt securities 313,895 Discounted cash flow Liquidity premium 1.0 % ~ 3.2 % 2.9 % 79,541 Return on Equity Method Probability of default 0.0 % ~ 8.0 % 0.4 % Recovery rate 60.0 % ~ 90.0 % 78.8 % Market-required return on capital 8.0 % ~ 10.0 % 10.0 % At March 31, 2021 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 12,841 Option model Correlation between interest rates 30.0 % ~ 61.9 % 44.8 % Correlation between interest rate and foreign exchange rate 15.1 % ~ 60.0 % 41.6 % Volatility 0.0 % ~ 100.0 % 65.0 % Foreign exchange contracts—net 7,283 Option model Correlation between interest rates 10.0 % ~ 70.0 % 51.0 % Correlation between interest rate and foreign exchange rate 0.0 % ~ 60.0 % 38.9 % Correlation between foreign exchange rates 50.0 % ~ 70.6 % 66.4 % Volatility 9.5 % ~ 22.1 % 13.7 % Equity contracts—net (4,597) Option model Correlation between foreign exchange rate and equity (58.4) % ~ 55.0 % 26.2 % Correlation between equities 15.0 % ~ 95.0 % 54.0 % Volatility 27.5 % ~ 40.0 % 31.8 % 5,557 Discounted Cash Flow Term of litigation 0.0 year ~ 1.2 years 0.6 year At September 30, 2021 Fair value (1)(5) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 17,468 Return on equity method Probability of default 0.2 % ~ 1.8 % 0.5 % Recovery rate 55.0 % ~ 90.0 % 67.0 % Market-required return on capital 10.0% 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 79,934 Discounted cash flow Recovery rate 100.0% 100.0 % 190,785 Internal model (4) Asset correlations 3.0% 3.0 % Discount factor 0.7 % ~ 0.9 % 0.9 % Prepayment rate 24.2% 24.2 % Probability of default 0.0 % ~ 85.9 % — (3) Recovery rate 60.0% 60.0 % Other debt securities 318,343 Discounted cash flow Liquidity premium 1.2 % ~ 3.2 % 3.0 % 60,867 Return on equity method Probability of default 0.1 % ~ 4.1 % 0.3 % Recovery rate 70.0 % ~ 90.0 % 83.3 % Market-required return on capital 8.0 % ~ 10.0 % 10.0 % At September 30, 2021 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 20,791 Option model Correlation between interest rates 30.0 % ~ 65.4 % 45.8 % Correlation between interest rate and foreign exchange rate 16.6 % ~ 60.0 % 41.5 % Volatility 13.0 % ~ 100.0 % 58.1 % Foreign exchange contracts—net 2,198 Option model Correlation between interest rates 30.0 % ~ 70.0 % 57.0 % Correlation between interest rate and foreign exchange rate 0.0 % ~ 60.0 % 39.1 % Correlation between foreign exchange rates 50.0 % 70.6 % 66.4 % Volatility 9.3 % ~ 22.5 % 14.0 % Equity contracts—net (3,540) Option model Correlation between foreign exchange rate and equity (58.4) % ~ 55.0 % 20.0 % Correlation between equities 14.9 % ~ 95.0 % 56.5 % Volatility 26.0 % ~ 35.5 % 28.8 % 6,441 Discounted cash flow Term of litigation 0.1 year ~ 1.3 years 0.7 year Notes: (1) The fair value as of March 31, 2021 and September 30, 2021 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) See “Probability of default” in “Change in and range of unobservable inputs” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2021. (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, 2021. (5) Fair value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Trading securities and Investment securities of ¥66,087 million, which are included in Other assets, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. Changes in and range of unobservable inputs For a discussion of the impact on fair value of changes in unobservable inputs and the relationships between unobservable inputs as well as a description of attributes of the underlying instruments and external market factors that affect the range of inputs used in the valuation of the MUFG Group’s Level 3 financial instruments, see Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2021. 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, 2021 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, 2021 and September 30, 2021: March 31, 2021 September 30, 2021 Level 1 Level 2 Level 3 Total carrying value Level 1 Level 2 Level 3 Total carrying value (3) (in millions) Assets Investment securities (1)(2) ¥ — ¥ 32,421 ¥ 8,357 ¥ 40,778 ¥ — ¥ 8,189 ¥ 5,034 ¥ 13,223 Loans 2,667 5,125 255,676 263,468 2,378 4,359 245,697 252,434 Loans held for sale — — 52,159 52,159 — — 42,254 42,254 Collateral dependent loans 2,667 5,125 203,517 211,309 2,378 4,359 203,443 210,180 Premises and equipment — — 15,243 15,243 — — 11,800 11,800 Intangible assets — — 2,421 2,421 — — 10,377 10,377 Goodwill — — 132,976 132,976 — — — — Other assets 111,626 33,840 24,512 169,978 11,880 — 15,168 27,048 Investments in equity method investees (1) 111,626 33,840 8,384 153,850 11,880 — — 11,880 Other — — 16,128 16,128 — — 15,168 15,168 Total ¥ 114,293 ¥ 71,386 ¥ 439,185 ¥ 624,864 ¥ 14,258 ¥ 12,548 ¥ 288,076 ¥ 314,882 Notes: (1) Excludes certain investments valued at net asset value of ¥24,319 million and ¥19,475 million at March 31, 2021 and September 30, 2021, respectively. The unfunded commitments related to these investments are ¥19,101 million and ¥18,494 million at March 31, 2021 and September 30, 2021, 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, 2021. (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. (3) Carrying value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Intangible assets of ¥10,273 million, which are included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. 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, 2020 and 2021: Losses(gains) for the six months ended September 30, 2020 2021 (in millions) Investment securities ¥ (701) ¥ 1,759 Loans 89,082 15,777 Loans held for sale 5,620 759 Collateral dependent loans 83,462 15,018 Premises and equipment 8,569 1,660 Intangible assets 4,286 17,459 Goodwill 106,479 — Other assets 87,584 17,500 Investments in equity method investees 53,138 7,020 Other 34,446 10,480 Total ¥ 295,299 ¥ 54,155 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, 2021. The following table presents the gains or losses recorded for the six months ended September 30, 2020 and 2021 related to the eligible instruments for which the MUFG Group elected the fair value option: Six months ended September 30, 2020 2021 Trading account profits (losses) Foreign exchange gains (losses) Total changes in fair value Trading account profits (losses) Foreign exchange gains (losses) Total changes in fair value (in millions) Financial assets: Trading account securities ¥ 148,265 ¥ (237,425) ¥ (89,160) ¥ 41,324 ¥ 121,942 ¥ 163,266 Total ¥ 148,265 ¥ (237,425) ¥ (89,160) ¥ 41,324 ¥ 121,942 ¥ 163,266 Financial liabilities: Other short-term borrowings (1) ¥ (15,805) ¥ — ¥ (15,805) ¥ 4,383 ¥ — ¥ 4,383 Long-term debt (1) (16,945) — (16,945) 32,402 — 32,402 Total ¥ (32,750) ¥ — ¥ (32,750) ¥ 36,785 ¥ — ¥ 36,785 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, 2021 and September 30, 2021 for long-term debt instruments for which the fair value option has been elected: March 31, 2021 September 30, 2021 Remaining aggregate contractual amounts outstanding Fair value Fair value over (under) remaining aggregate contractual amounts outstanding Remaining aggregate contractual amounts outstanding Fair value Fair value over (under) remaining aggregate contractual amounts outstanding (in millions) Financial liabilities: Long-term debt ¥ 420,227 ¥ 402,823 ¥ (17,404) ¥ 513,292 ¥ 499,929 ¥ (13,363) Total ¥ 420,227 ¥ 402,823 ¥ (17,404) ¥ 513,292 ¥ 499,929 ¥ (13,363) 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, 2021 and September 30, 2021: At March 31, 2021 Carrying amount Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 49,977 ¥ 49,977 ¥ 49,977 ¥ — ¥ — Interest-earning deposits in other banks 53,347 53,347 — 53,347 — Call loans and funds sold 1,256 1,256 — 1,256 — Receivables under resale agreements 13,780 13,780 — 13,780 — Receivables under securities borrowing transactions 3,370 3,370 — 3,370 — Investment securities 3,904 3,939 1,123 780 2,036 Loans, net of allowance for credit losses (1) 114,350 115,709 3 298 115,408 Other financial assets (2) 8,108 8,108 — 8,108 — Financial liabilities: Deposits Non-interest-bearing ¥ 38,521 ¥ 38,521 ¥ — ¥ 38,521 ¥ — Interest-bearing 190,695 190,712 — 190,712 — Total deposits 229,216 229,233 — 229,233 — Call money and funds purchased 2,354 2,354 — 2,354 — Payables under repurchase agreements 24,568 24,568 — 24,568 — Payables under securities lending transactions 843 843 — 843 — Due to trust account and other short-term borrowings 17,883 17,883 — 17,883 — Long-term debt 34,773 35,042 — 35,042 — Other financial liabilities 7,027 7,027 — 7,027 — At September 30, 2021 Carrying amount (3) Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 50,694 ¥ 50,694 ¥ 50,694 ¥ — ¥ — Interest-earning deposits in other banks 54,429 54,429 — 54,429 — Call loans and funds sold 1,456 1,456 — 1,456 — Receivables under resale agreements 12,071 12,071 — 12,071 — Receivables under securities borrowing transactions 3,466 3,466 — 3,466 — Investment securities 4,130 4,172 1,120 867 2,185 Loans, net of allowance for credit losses (1) 111,527 112,821 2 305 112,514 Other financial assets (2) 7,064 7,064 — 7,064 — Financial liabilities: Deposits Non-interest-bearing ¥ 39,174 ¥ 39,174 ¥ — ¥ 39,174 ¥ — Interest-bearing 190,708 190,718 — 190,718 — Total deposits 229,882 229,892 — 229,892 — Call money and funds purchased 2,580 2,580 — 2,580 — Payables under repurchase agreements 25,489 25,489 — 25,489 — Payables under securities lending transactions 834 834 — 834 — Due to trust account and other short-term borrowings 18,069 18,069 — 18,069 — Long-term debt 33,705 34,011 — 34,011 — Other financial liabilities 8,196 8,196 — 8,196 — 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 ¥2,560 billion and ¥2,774 billion at March 31, 2021 and September 30, 2021, respectively. (3) Carrying amounts in this table include those relating to transferred business of MUFG Union Bank, such as Cash and due from banks of ¥224 billion, Interest-earning deposits in other banks of ¥1,288 billion, Investment securities of ¥858 billion, Loans, net of allowance for credit losses of ¥6,360 billion and Other financial assets of ¥310 billion, which are included in Other assets, and Total deposits of ¥9,933 billion, Long-term debt of ¥705 billion and Other financial liabilities of ¥160 billion, which are included in Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. The fair values of certain off-balance sheet financial instruments held for purposes other than trading, including commitments to extend credit and commercial letters of credit, are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the credit quality. The aggregate fair value of such instruments at March 31, 2021 and September 30, 2021 was not material.

Investments in Equity Method In

Investments in Equity Method Investees	6 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Investments in Equity Method Investees	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, 2020 and 2021 are as follows: 2020 2021 (in billions) Net revenues ¥ 2,714 ¥ 3,240 Total non-interest expenses 1,838 2,193 Income from continuing operations before income taxes 838 1,037 Net income applicable to Morgan Stanley 632 793

Subsequent Events

Subsequent Events	6 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Approval of Dividends On November 15, 2021 the Board of Directors of MUFG approved the payment of semi-annual interim cash dividends of ¥13.5 per share of Common stock, totaling ¥173,791 million, that were payable on December 6, 2021 to the shareholders of record on September 30, 2021. Repurchase and Cancellation of own shares At the meeting of the Board of Directors of MUFG held on November 15, 2021, it was resolved to repurchase up to 300,000,000 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥150 billion, in aggregate, from November 16, 2021 to March 31, 2022. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 300,000,000 shares, which represents the equivalent of 2.33% of the total number of common shares outstanding excluding own shares, or of an aggregate repurchase amount of up to ¥150 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. Under this share repurchase program, MUFG repurchased 35,600,900 shares of its common stock for ¥22,605 million in November 2021. Also, on November 30, 2021, MUFG canceled 300,000,000 shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 15, 2021.

Basis of Semiannual Condensed_2

Basis of Semiannual Condensed Consolidated Financial Statements (Policies)	6 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Description of business	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 for more information by business segment.
Basis of financial statements	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 (“VIEs”) (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, 2021. Certain information that would be included in annual financial statements but is not required for semiannual reporting purposes under U.S. GAAP has been omitted or condensed.
Use of Estimates	Use of EstimatesThe 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.

Business Developments (Tables)

Business Developments (Tables)	6 Months Ended
	Sep. 30, 2021
Discontinued Operations and Disposal Groups [Abstract]
Schedule of assets and liabilities reclassified as held for sale	Assets and liabilities reclassified as held for sale at September 30, 2021 are shown below: At September 30, 2021 (in millions) Assets held for sale: Interest-earning deposits in other banks ¥ 1,288,478 Investment securities 3,127,206 Loans, net of allowance for credit losses 6,359,733 Other 933,078 Total ¥ 11,708,495 Liabilities held for sale: Deposits ¥ 9,933,030 Other 941,579 Total ¥ 10,874,609

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Amortized Costs Gross Unrealized Gain Loss and Estimated Fair Values		The following tables present the amortized cost, gross unrealized gains and losses, and fair value of Available-for-sale debt securities and Held-to-maturity debt securities at March 31, 2021 and September 30, 2021: At March 31, 2021: Amortized cost Gross unrealized gains Gross unrealized losses Fair value (in millions) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 35,166,245 ¥ 147,844 ¥ 40,878 ¥ 35,273,211 Japanese prefectural and municipal bonds 3,719,205 15,123 2,815 3,731,513 Foreign government and official institution bonds 2,854,037 84,707 11,781 2,926,963 Corporate bonds 1,123,271 11,400 401 1,134,270 Residential mortgage-backed securities 1,459,062 9,119 1,051 1,467,130 Commercial mortgage-backed securities 435,975 29,502 912 464,565 Asset-backed securities 1,373,450 11,685 650 1,384,485 Other debt securities 168,528 3,780 730 171,578 Commercial paper 564,072 31 5 564,098 Total ¥ 46,863,845 ¥ 313,191 ¥ 59,223 ¥ 47,117,813 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 1,100,447 ¥ 23,033 ¥ — ¥ 1,123,480 Foreign government and official institution bonds 233,883 2,262 2,795 233,350 Residential mortgage-backed securities 411,024 18,590 — (1) 429,614 Commercial mortgage-backed securities 111,750 4,846 — (1) 116,596 Asset-backed securities 2,046,659 1,721 12,277 2,036,103 Total ¥ 3,903,763 ¥ 50,452 ¥ 15,072 ¥ 3,939,143 Note: (1) 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 other comprehensive income (loss)(“Accumulated OCI”) in the accompanying condensed consolidated balance sheets were ¥4,849 million and ¥1,920 million, respectively, at March 31, 2021 and are not included in the table above. At September 30, 2021: Amortized cost (3) Gross unrealized gains Gross unrealized losses Fair value (2) (in millions) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 36,114,443 ¥ 119,213 ¥ 18,657 ¥ 36,214,999 Japanese prefectural and municipal bonds 4,002,464 15,214 1,605 4,016,073 Foreign government and official institution bonds 3,343,700 68,416 19,856 3,392,260 Corporate bonds 1,077,930 11,631 236 1,089,325 Residential mortgage-backed securities 1,706,456 6,714 8,168 1,705,002 Commercial mortgage-backed securities 475,797 21,786 2,215 495,368 Asset-backed securities 1,387,750 15,158 179 1,402,729 Other debt securities 169,413 8,305 639 177,079 Commercial paper 872,096 46 22 872,120 Total ¥ 49,150,049 ¥ 266,483 ¥ 51,577 ¥ 49,364,955 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 1,100,384 ¥ 19,116 ¥ — ¥ 1,119,500 Foreign government and official institution bonds 444,070 1,875 9,731 436,214 Residential mortgage-backed securities 309,905 13,136 — (1) 323,041 Commercial mortgage-backed securities 104,015 3,480 — (1) 107,495 Asset-backed securities 2,171,222 15,718 1,531 2,185,409 Total ¥ 4,129,596 ¥ 53,325 ¥ 11,262 ¥ 4,171,659 Notes: (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 ¥3,732 million and ¥1,549 million, respectively, at September 30, 2021 and are not included in the table above. (2) Fair value amounts in the above table include those relating to Available-for-sale debt securities of ¥2,265,674 million and Held-to-maturity debt securities of ¥866,751 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. (3) Amortized cost amounts in the above table include those relating to Held-to-maturity debt securities of ¥857,990 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Amortized Cost and Fair Value by Contractual Maturity	Debt securities not due at a single maturity date and securities embedded with call or prepayment options, such as mortgage-backed securities, are included in the table below based on their contractual maturities. Held-to-maturity debt securities Available-for-sale debt securities Amortized cost (2) Fair value (1) Fair value (1) (in millions) Due in one year or less ¥ 33,628 ¥ 34,077 ¥ 26,058,777 Due from one year to five years 1,151,974 1,172,776 9,517,496 Due from five years to ten years 1,287,456 1,295,231 7,723,907 Due after ten years 1,656,538 1,669,575 6,064,775 Total ¥ 4,129,596 ¥ 4,171,659 ¥ 49,364,955 Notes: (1) Fair value amounts in the above table include those relating to Available-for-sale debt securities of ¥2,265,674 million and Held-to-maturity debt securities of ¥866,751 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. (2) Amortized cost amounts in the above table include those relating to Held-to-maturity debt securities of ¥857,990 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Investments by Length and Category in Continuous Loss Position	The following tables show the gross unrealized losses and fair value of Available-for-sale debt securities at March 31, 2021 and September 30, 2021 by length of time that individual securities in each category have been in a continuous loss position: Less than 12 months 12 months or more Total At March 31, 2021: Fair value Gross Fair value Gross Fair value Gross Number of securities (in millions, except number of securities) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 12,098,437 ¥ 31,055 ¥ 429,235 ¥ 9,823 ¥ 12,527,672 ¥ 40,878 286 Japanese prefectural and municipal bonds 870,007 1,584 276,172 1,231 1,146,179 2,815 405 Foreign government and official institution bonds 429,204 11,768 50,478 13 479,682 11,781 71 Corporate bonds 96,582 166 229,518 235 326,100 401 120 Residential mortgage-backed securities 378,351 577 139,214 474 517,565 1,051 218 Commercial mortgage-backed securities 36,633 905 2,616 7 39,249 912 21 Asset-backed securities 190,795 394 49,428 256 240,223 650 89 Other debt securities 22,812 91 22,388 639 45,200 730 17 Commercial paper 116,016 5 — — 116,016 5 8 Total ¥ 14,238,837 ¥ 46,545 ¥ 1,199,049 ¥ 12,678 ¥ 15,437,886 ¥ 59,223 1,235 Less than 12 months 12 months or more Total At September 30, 2021: Fair value Gross Fair value Gross Fair value (1) Gross Number of (in millions, except number of securities) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥24,712,396 ¥ 13,802 ¥ 390,498 ¥ 4,855 ¥ 25,102,894 ¥ 18,657 240 Japanese prefectural and municipal bonds 1,004,671 1,543 32,551 62 1,037,222 1,605 389 Foreign government and official institution bonds 1,010,780 19,776 68,312 80 1,079,092 19,856 158 Corporate bonds 145,240 117 121,171 119 266,411 236 98 Residential mortgage-backed securities 802,616 7,591 180,689 577 983,305 8,168 231 Commercial mortgage-backed securities 71,423 1,961 5,680 254 77,103 2,215 36 Asset-backed securities 108,457 74 13,441 105 121,898 179 42 Other debt securities 27,910 74 18,354 565 46,264 639 17 Commercial paper 424,053 22 — — 424,053 22 28 Total ¥ 28,307,546 ¥ 44,960 ¥ 830,696 ¥ 6,617 ¥ 29,138,242 ¥ 51,577 1,239 Note: (1) Fair value amounts of a continuous loss position in the above table include those relating to Available-for-sale debt securities of ¥1,056,529 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Net Realized Gains (Losses) on Sales of Equity Securities and Net Unrealized Gains (Losses) on Equity Securities Still Held at the Reporting Date	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, 2020 and 2021. Six months ended 2020 2021 (in millions) Net gains recognized during the period (1) ¥ 683,303 ¥ 289,949 Less: Net gains (losses) recognized during the period on equity securities sold during the period 17,136 (1,913) Net unrealized gains recognized during the reporting period still held at the reporting date ¥ 666,167 ¥ 291,862 Note: (1) Included in Investment securities gains—net.
Carrying Value of Nonmarketable Equity Securities	The following table presents the carrying value of nonmarketable equity securities that are measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes (“measurement alternative”), held at March 31, 2021 and September 30, 2021. March 31, September 30, (in millions) Measurement alternative balance ¥ 356,074 ¥ 363,991
Related Adjustments for Nonmarketable Equity Securities	The related adjustments for these securities during the six months ended September 30, 2020 and 2021 were as follows: Six months ended 2020 2021 (in millions) Measurement alternative impairment losses (1)(4) ¥ (2,984) ¥ (2,834) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ — ¥ — Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ 3,685 ¥ 1,075 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, 2021 and September 30, 2021 were ¥10,102 million and ¥12,591 million , respectively. (5) The cumulative downward changes for observable prices at March 31, 2021 and September 30, 2021 were ¥953 million and ¥953 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2021 and September 30, 2021 were ¥54,806 million and ¥53,600 million, respectively.

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	6 Months Ended
	Sep. 30, 2021
Receivables [Abstract]
Loans by Domicile and Industry of Borrower Segment Classification	Loans at March 31, 2021 and September 30, 2021 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 ¥ 13,133,360 ¥ 12,529,819 Construction 763,958 692,467 Real estate 11,997,301 12,014,585 Services 2,908,975 2,735,763 Wholesale and retail 7,766,070 7,729,051 Banks and other financial institutions (1) 6,443,296 5,904,659 Communication and information services 1,407,738 1,336,456 Other industries 8,838,718 8,681,345 Consumer 15,066,986 14,826,762 Total domestic 68,326,402 66,450,907 Foreign: Governments and official institutions 655,367 640,035 Banks and other financial institutions (1) 10,649,029 11,703,363 Commercial and industrial 29,574,176 27,672,268 Other 6,822,771 6,617,255 Total foreign 47,701,343 46,632,921 Unearned income, unamortized premiums—net and deferred loan fees—net (308,882) (301,543) Less: Loans in transferred business of MUFG Union Bank (3) — (6,431,831) Total (2) ¥ 115,718,863 ¥ 106,350,454 Notes: (1) 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. (2) The above table includes loans held for sale of ¥353,095 million at March 31, 2021 and ¥325,921 million at September 30, 2021, respectively. (3) Represents loans in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Nonaccrual Loans by Class	The information on nonaccrual loans by class at March 31, 2021 and September 30, 2021 are shown below: Recorded Loan Balance March 31, 2021: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 565,671 ¥ 111,141 Foreign 258,391 96,833 Residential 67,968 4,720 Card 60,200 — MUAH 73,706 30,242 Krungsri 161,338 3,042 Other 26,567 29 Total ¥ 1,213,841 ¥ 246,007 Recorded Loan Balance September 30, 2021: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 541,779 ¥ 110,425 Foreign 246,097 88,415 Residential 61,314 5,144 Card 61,723 — MUAH 75,344 30,864 Krungsri 157,215 1,861 Other 28,018 — Total ¥ 1,171,490 ¥ 236,709 Notes: (1) Nonaccrual loans in the above table do not include loans held for sale of ¥8,562 million and ¥14,832 million at March 31, 2021 and September 30, 2021, respectively. These loans include loans in transferred business of MUFG Union Bank of ¥55,035 million at September 30, 2021. See Note 2 for more information. (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 held for sale of ¥8,562 million and ¥14,832 million at March 31, 2021 and September 30, 2021, respectively, are not included in nonaccrual loans not requiring an allowance for credit losses. These loans include loans in transferred business of MUFG Union Bank of ¥30,864 million at September 30, 2021. See Note 2 for more information. The following table shows information regarding recognized interest income on nonaccrual loans for the six months ended September 30, 2020 and 2021: September 30, 2020 September 30, 2021 (in millions) Commercial Domestic ¥ 2,229 ¥ 2,004 Foreign 2,061 2,301 Residential 488 422 Card 20 13 MUAH 483 377 Krungsri 3,498 2,950 Other 3,153 1,922 Total ¥ 11,932 ¥ 9,989
TDRs by Class	The following table summarizes the MUFG Group’s TDRs by class for the six months ended September 30, 2020 and 2021: Six months ended September 30, 2020: Troubled Debt Restructurings Troubled Debt Restructurings that Subsequently Defaulted Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Recorded Investment (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 Six months ended September 30, 2021: Troubled Debt Restructurings Troubled Debt Restructurings that Subsequently Defaulted Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Recorded Investment (in millions) Commercial (1)(3) Domestic ¥ 94,584 ¥ 93,578 ¥ 7,048 Foreign 529 529 8,447 Residential (1)(3) 13,707 13,707 117 Card (2)(3) 11,485 10,877 1,269 MUAH (2)(3)(4) 14,233 14,243 258 Krungsri (2)(3) 8,135 8,135 2,104 Other (2) 5,104 5,104 1,641 Total ¥ 147,777 ¥ 146,173 ¥ 20,884 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, 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. For the six months ended September 30, 2021, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment. (4) The above table includes the loans in transferred business of MUFG Union Bank at September 30, 2021. See Note 2 for more information.
Credit Quality Indicators of Loans by Class	Credit quality indicators of loans and fiscal year of origination by class at March 31, 2021 and September 30, 2021 are shown below: Term Loans Revolving Revolving Total (1) At March 31, 2021: 2020 2019 2018 2017 2016 Prior (in millions) Commercial: ¥ 29,805,641 ¥ 10,256,709 ¥ 9,410,172 ¥ 5,360,221 ¥ 4,736,515 ¥ 6,945,092 ¥ 19,401,336 ¥ 9,776 ¥ 85,925,462 Domestic 22,402,694 6,392,946 6,126,746 3,840,964 3,649,145 5,286,408 6,934,308 — 54,633,211 Normal 21,936,776 6,058,126 5,915,318 3,666,734 3,551,332 4,847,597 6,604,586 — 52,580,469 Close Watch 431,223 319,073 195,630 162,176 74,698 317,622 306,236 — 1,806,658 Likely to become Bankrupt or Legally/Virtually Bankrupt 34,695 15,747 15,798 12,054 23,115 121,189 23,486 — 246,084 Foreign 7,402,947 3,863,763 3,283,426 1,519,257 1,087,370 1,658,684 12,467,028 9,776 31,292,251 Normal 7,158,793 3,704,240 3,155,261 1,423,064 1,032,052 1,534,943 12,231,018 9,776 30,249,147 Close Watch 200,305 118,027 91,867 60,422 51,433 69,436 197,405 — 788,895 Likely to become Bankrupt or Legally/Virtually Bankrupt 43,849 41,496 36,298 35,771 3,885 54,305 38,605 — 254,209 Residential ¥ 623,328 ¥ 847,314 ¥ 822,883 ¥ 892,166 ¥ 1,304,110 ¥ 8,660,022 ¥ 32,984 ¥ 8 ¥ 13,182,815 Accrual 623,035 846,787 822,411 891,407 1,302,427 8,599,621 30,897 — 13,116,585 Nonaccrual 293 527 472 759 1,683 60,401 2,087 8 66,230 Card ¥ 14 ¥ 96 ¥ 171 ¥ 304 ¥ 110 ¥ 513 ¥ 417,804 ¥ 60,284 ¥ 479,296 Accrual 1 10 13 19 7 79 404,301 14,666 419,096 Nonaccrual 13 86 158 285 103 434 13,503 45,618 60,200 MUAH ¥ 1,406,996 ¥ 1,366,930 ¥ 915,570 ¥ 861,742 ¥ 770,568 ¥ 1,291,561 ¥ 1,882,377 ¥ — ¥ 8,495,744 Credit Quality Based on the Number of Delinquencies Accrual 472,892 608,580 324,369 552,380 516,051 656,087 130,514 — ¥ 3,260,873 Nonaccrual — 725 518 1,139 1,035 14,801 828 — 19,046 Credit Quality Based on Internal Credit Ratings Pass 920,959 707,841 486,354 287,316 236,715 542,634 1,625,799 — 4,807,618 Special Mention 4,865 31,361 49,784 14,904 9,522 30,015 76,487 — 216,938 Classified 8,280 18,423 54,545 6,003 7,245 48,024 48,749 — 191,269 Krungsri ¥ 1,316,031 ¥ 1,197,815 ¥ 958,241 ¥ 506,919 ¥ 285,427 ¥ 402,752 ¥ 1,922,946 ¥ 14,514 ¥ 6,604,645 Performing 1,251,246 1,086,710 855,915 434,818 241,811 314,114 1,754,840 — 5,939,454 Under-Performing 52,821 85,408 74,848 57,314 31,886 57,129 144,447 — 503,853 Non-Performing 11,964 25,697 27,478 14,787 11,730 31,509 23,659 14,514 161,338 Other ¥ 338,342 ¥ 164,650 ¥ 84,115 ¥ 37,394 ¥ 11,030 ¥ 8,538 ¥ 342,619 ¥ — ¥ 986,688 Accrual 335,830 159,363 79,608 35,366 10,556 8,201 331,197 — 960,121 Nonaccrual 2,512 5,287 4,507 2,028 474 337 11,422 — 26,567 Term Loans Revolving Revolving Total (1) At September 30, 2021: 2021 2020 2019 2018 2017 Prior (in millions) Commercial: ¥ 18,453,877 ¥ 14,031,765 ¥ 8,729,077 ¥ 7,934,655 ¥ 4,617,515 ¥ 10,141,926 ¥ 19,085,841 ¥ 3,618 ¥ 82,998,274 Domestic 13,682,280 9,706,901 5,701,452 5,531,710 3,431,971 8,069,620 6,836,453 — 52,960,387 Normal 13,476,976 9,379,217 5,374,910 5,347,194 3,288,990 7,592,772 6,511,649 — 50,971,708 Close Watch 187,910 303,221 311,227 172,855 128,990 348,587 302,139 — 1,754,929 Likely to become Bankrupt or Legally/Virtually Bankrupt 17,394 24,463 15,315 11,661 13,991 128,261 22,665 — 233,750 Foreign 4,771,597 4,324,864 3,027,625 2,402,945 1,185,544 2,072,306 12,249,388 3,618 30,037,887 Normal 4,629,791 4,176,598 2,943,456 2,301,257 1,102,141 1,948,945 12,074,150 3,618 29,179,956 Close Watch 109,375 104,006 68,176 72,739 48,437 72,635 140,307 — 615,675 Likely to become Bankrupt or Legally/Virtually Bankrupt 32,431 44,260 15,993 28,949 34,966 50,726 34,931 — 242,256 Residential ¥ 341,196 ¥ 607,300 ¥ 825,437 ¥ 798,135 ¥ 862,156 ¥ 9,504,401 ¥ 30,350 ¥ 8 ¥ 12,968,983 Accrual 341,125 607,036 824,939 797,610 861,322 9,448,841 28,306 — 12,909,179 Nonaccrual 71 264 498 525 834 55,560 2,044 8 59,804 Card ¥ 1 ¥ 75 ¥ 149 ¥ 188 ¥ 299 ¥ 520 ¥ 404,682 ¥ 62,406 ¥ 468,320 Accrual — 4 10 11 16 55 391,619 14,882 406,597 Nonaccrual 1 71 139 177 283 465 13,063 47,524 61,723 MUAH ¥ 957,613 ¥ 1,218,450 ¥ 1,192,906 ¥ 795,520 ¥ 715,342 ¥ 1,761,857 ¥ 2,060,216 ¥ — ¥ 8,701,904 Credit Quality Based on the Number of Delinquencies Accrual 521,772 439,777 437,123 225,583 410,915 942,916 120,864 — 3,098,950 Nonaccrual — — 332 332 995 14,265 663 — 16,587 Credit Quality Based on Internal Credit Ratings Pass 428,211 758,437 707,238 483,020 286,292 736,337 1,853,100 — 5,252,635 Special Mention 442 5,087 31,847 25,655 14,597 13,491 58,829 — 149,948 Classified 7,188 15,149 16,366 60,930 2,543 54,848 26,760 — 183,784 Krungsri ¥ 640,591 ¥ 1,115,181 ¥ 1,041,784 ¥ 834,107 ¥ 398,161 ¥ 572,795 ¥ 1,950,932 ¥ 15,320 ¥ 6,568,871 Performing 616,680 1,034,730 918,713 724,790 328,519 443,815 1,780,963 — 5,848,210 Under-Performing 20,246 64,569 97,874 84,307 56,641 90,904 148,905 — 563,446 Non-Performing 3,665 15,882 25,197 25,010 13,001 38,076 21,064 15,320 157,215 Other ¥ 248,301 ¥ 191,687 ¥ 121,279 ¥ 58,672 ¥ 28,283 ¥ 19,768 ¥ 329,934 ¥ — ¥ 997,924 Accrual 248,155 181,373 118,153 56,396 27,053 18,866 319,911 — 969,907 Nonaccrual 146 10,314 3,126 2,276 1,230 902 10,023 — 28,017 Note: (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. These loans include loans in transferred business of MUFG Union Bank of ¥6,378,200 million at September 30, 2021. See Note 2 for more information.
Ages of Past Due Loans by Class	Ages of past due loans by class at March 31, 2021 and September 30, 2021 are shown below: At March 31, 2021: 1-3 months Greater Total Current Total Loans (1) 90 Days and (in millions) Commercial Domestic ¥ 4,763 ¥ 22,996 ¥ 27,759 ¥ 54,605,452 ¥ 54,633,211 ¥ 4,673 Foreign 7,302 22,473 29,775 31,262,476 31,292,251 91 Residential 39,577 28,375 67,952 13,114,863 13,182,815 11,150 Card 2,127 26,786 28,913 450,383 479,296 — MUAH 42,082 29,337 71,419 8,424,325 8,495,744 4,626 Krungsri 131,573 127,533 259,106 6,345,539 6,604,645 — Other 21,776 24,201 45,977 940,711 986,688 — Total ¥ 249,200 ¥ 281,701 ¥ 530,901 ¥ 115,143,749 ¥ 115,674,650 ¥ 20,540 At September 30, 2021: 1-3 months Greater Total Current Total Loans (1) 90 Days and (in millions) Commercial Domestic ¥ 8,314 ¥ 10,101 ¥ 18,415 ¥ 52,941,972 ¥ 52,960,387 ¥ 3,956 Foreign 9,966 15,288 25,254 30,012,633 30,037,887 — Residential 36,733 17,456 54,189 12,914,794 12,968,983 4,899 Card 2,330 27,037 29,367 438,953 468,320 — MUAH 46,954 19,925 66,879 8,635,025 8,701,904 3,202 Krungsri 130,628 121,735 252,363 6,316,508 6,568,871 — Other 23,232 21,867 45,099 952,825 997,924 — Total ¥ 258,157 ¥ 233,409 ¥ 491,566 ¥ 112,212,710 ¥ 112,704,276 ¥ 12,057 Note: (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. These loans include loans in transferred business of MUFG Union Bank of ¥6,378,200 million at September 30, 2021. See Note 2 for more information.
Changes in Allowance for Credit Losses by Portfolio Segment	Changes in the allowance for credit losses of loans by portfolio segment for the six months ended September 30, 2020 and 2021 are shown below: 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 (1) 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 (2) (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 Six months ended September 30, 2021: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 734,577 ¥ 82,893 ¥ 44,217 ¥ 131,755 ¥ 293,396 ¥ 61,553 ¥ 1,348,391 Provision for (reversal of) credit losses (36,415) (6,943) 7,595 (38,568) 42,836 20,657 (10,838) Charge-offs 36,033 1,399 8,704 9,459 46,405 30,040 132,040 Recoveries collected 6,360 10 691 3,335 11,741 5,593 27,730 Net charge-offs 29,673 1,389 8,013 6,124 34,664 24,447 104,310 Less: Loans in transferred business of MUFG Union Bank (3) — — — (72,098) — — (72,098) Other (2) (17) — — 7,815 (141) 2,656 10,313 Balance at end of period ¥ 668,472 ¥ 74,561 ¥ 43,799 ¥ 22,780 ¥ 301,427 ¥ 60,419 ¥ 1,171,458 Notes: (1) See Note 1 to the consolidated financial statements for the fiscal year ended March 31, 2021 for more information. (2) Other is principally comprised of gains or losses from foreign exchange translation. (3) Represents allowance for credit losses relating to loans in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Movement in Carrying Amount of Goodwill	The table below presents the movement in the carrying amount of goodwill during the six months ended September 30, 2020 and 2021: Six months ended 2020 2021 (in millions) Balance at beginning of period Goodwill (1) ¥ 1,093,554 ¥ 1,094,344 Accumulated impairment losses (1) (575,928) (723,492) 517,626 370,852 Goodwill acquired during the six months 3,990 — Impairment loss (106,479) — Foreign currency translation adjustments and other (10,128) 19,329 Balance at end of period Goodwill 1,087,416 1,113,673 Accumulated impairment losses (682,407) (723,492) Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank (2) ¥ — ¥ (90,123) ¥ 405,009 ¥ 300,058 Notes: (1) Goodwill originally recognized of ¥1,900,019 million, which has been fully impaired before April 1, 2020, is not included in the table above. (2) Represents goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Notes 2 for more information.
Carrying Amount of Other Intangible Assets by Major Class	The table below presents the net carrying amount by major class of other intangible assets at March 31, 2021 and September 30, 2021: March 31, September 30, (in millions) Intangible assets subject to amortization: Software ¥ 776,429 ¥ 788,935 Customer relationships 265,155 258,860 Core deposit intangibles 62,021 59,393 Trade names 50,793 49,388 Other 10,496 10,396 Total 1,164,894 1,166,972 Intangible assets not subject to amortization: Other (1) 20,100 20,571 Less: Intangible assets in transferred business of MUFG Union Bank (2) — (38,004) Total ¥ 1,184,994 ¥ 1,149,539 Notes: (1) Intangible assets not subject to amortization includes mortgage servicing rights accounted for at fair value of ¥11,355 million and ¥12,053 million at March 31, 2021 and September 30, 2021, respectively. (2) Represents intangible assets in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.

Lease Transactions (Tables)

Lease Transactions (Tables)	6 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Profit or Loss of Lease Transactions	The following table presents profit or loss of lease transactions as a lessor for the six months ended September 30, 2020 and September 30, 2021: September 30, September 30, (in millions) Sales type and direct financing leases: Finance income on net investment ¥ 64,748 ¥ 59,369 Operating leases: Lease income ¥ 2,025 ¥ 1,843 Total ¥ 66,773 ¥ 61,212

Pledged Assets and Collateral (

Pledged Assets and Collateral (Tables)	6 Months Ended
	Sep. 30, 2021
Financial Instruments Pledged as Collateral [Abstract]
Assets Mortgaged Pledged or Otherwise Subject to Lien	At September 30, 2021, assets mortgaged, pledged, or otherwise subject to lien were as follows: September 30, 2021 (1) (in millions) Trading account securities ¥ 12,101,156 Investment securities 18,996,743 Loans 12,287,113 Other 22,129 Total ¥ 43,407,141 Note: (1) The above table includes pledged assets of ¥860,646 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Pledged Assets Classified by Type of Liabilities	The above pledged assets were classified by type of liabilities to which they related as follows: September 30, 2021 (1) (in millions) Deposits ¥ 244,149 Payables under repurchase agreements and securities lending transactions 14,867,093 Other short-term borrowings and long-term debt 28,266,550 Other 29,349 Total ¥ 43,407,141 Note: (1) The above table includes liabilities amounts to which pledged assets of ¥860,646 million in transferred business of MUFG Union Bank relate at September 30, 2021. See Note 2 for more information.

Severance Indemnities and Pen_2

Severance Indemnities and Pension Plans (Tables)	6 Months Ended
	Sep. 30, 2021
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Cost of Pension Benefits, SIPs and Other Benefits	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, 2020 and 2021: Six months ended September 30, Domestic subsidiaries Foreign offices and subsidiaries 2020 2021 2020 2021 Pension benefits and SIPs Pension benefits and SIPs Pension benefits Other benefits Pension benefits Other benefits (in millions) Service cost—benefits earned during the period ¥ 23,695 ¥ 22,196 ¥ 7,354 ¥ 117 ¥ 9,276 ¥ 100 Interest cost on projected benefit obligation 5,596 6,081 7,255 402 5,575 264 Expected return on plan assets (35,577) (41,132) (15,785) (1,072) (16,254) (1,182) Amortization of net actuarial loss 8,547 137 8,158 125 3,215 73 Amortization of prior service cost (602) (629) (1,309) (226) (1,343) (189) Gain on settlements and curtailment (1,084) (2,632) — — — — Net periodic benefit cost (income) ¥ 575 ¥ (15,979) ¥ 5,673 ¥ (654) ¥ 469 ¥ (934)

Offsetting of Derivatives, Re_2

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions (Tables)	6 Months Ended
	Sep. 30, 2021
Offsetting [Abstract]
Offsetting Assets	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 Gross amounts offset in the condensed consolidated balance sheet Net amounts presented in the condensed consolidated balance sheet Gross amounts not offset in the condensed consolidated balance sheet Net amounts At March 31, 2021: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 11,997 ¥ — ¥ 11,997 ¥ (8,628) ¥ (605) ¥ 2,764 Receivables under resale agreements 16,053 (2,273) 13,780 (12,687) (37) 1,056 Receivables under securities borrowing transactions 3,370 — 3,370 (3,289) — 81 Total ¥ 31,420 ¥ (2,273) ¥ 29,147 ¥ (24,604) ¥ (642) ¥ 3,901 Financial liabilities: Derivative liabilities ¥ 11,714 ¥ — ¥ 11,714 ¥ (8,545) ¥ (1,624) ¥ 1,545 Payables under repurchase agreements 26,800 (2,232) 24,568 (23,835) (60) 673 Payables under securities lending transactions 843 — 843 (814) (2) 27 Obligations to return securities received as collateral 6,582 — 6,582 (1,931) — 4,651 Total ¥ 45,939 ¥ (2,232) ¥ 43,707 ¥ (35,125) ¥ (1,686) ¥ 6,896 Gross Gross amounts offset in the condensed consolidated balance sheet Net amounts presented in the condensed consolidated balance sheet (1) Gross amounts not offset in the condensed consolidated balance sheet Net amounts At September 30, 2021: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 9,932 ¥ — ¥ 9,932 ¥ (7,041) ¥ (564) ¥ 2,327 Receivables under resale agreements 14,333 (2,262) 12,071 (11,418) (24) 629 Receivables under securities borrowing transactions 3,542 (76) 3,466 (3,392) — 74 Total ¥ 27,807 ¥ (2,338) ¥ 25,469 ¥ (21,851) ¥ (588) ¥ 3,030 Financial liabilities: Derivative liabilities ¥ 9,426 ¥ — ¥ 9,426 ¥ (6,999) ¥ (1,207) ¥ 1,220 Payables under repurchase agreements 27,720 (2,231) 25,489 (24,685) (101) 703 Payables under securities lending transactions 910 (76) 834 (813) — 21 Obligations to return securities received as collateral 5,975 — 5,975 (1,494) — 4,481 Total ¥ 44,031 ¥ (2,307) ¥ 41,724 ¥ (33,991) ¥ (1,308) ¥ 6,425 Note: (1) Net amounts presented in the condensed consolidated balance sheet in the above table include Derivative assets of ¥87 billion and Derivative liabilities of ¥17 billion in transferred business of MUFG Union Bank, which is included in Other assets and Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Offsetting Liabilities	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 Gross amounts offset in the condensed consolidated balance sheet Net amounts presented in the condensed consolidated balance sheet Gross amounts not offset in the condensed consolidated balance sheet Net amounts At March 31, 2021: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 11,997 ¥ — ¥ 11,997 ¥ (8,628) ¥ (605) ¥ 2,764 Receivables under resale agreements 16,053 (2,273) 13,780 (12,687) (37) 1,056 Receivables under securities borrowing transactions 3,370 — 3,370 (3,289) — 81 Total ¥ 31,420 ¥ (2,273) ¥ 29,147 ¥ (24,604) ¥ (642) ¥ 3,901 Financial liabilities: Derivative liabilities ¥ 11,714 ¥ — ¥ 11,714 ¥ (8,545) ¥ (1,624) ¥ 1,545 Payables under repurchase agreements 26,800 (2,232) 24,568 (23,835) (60) 673 Payables under securities lending transactions 843 — 843 (814) (2) 27 Obligations to return securities received as collateral 6,582 — 6,582 (1,931) — 4,651 Total ¥ 45,939 ¥ (2,232) ¥ 43,707 ¥ (35,125) ¥ (1,686) ¥ 6,896 Gross Gross amounts offset in the condensed consolidated balance sheet Net amounts presented in the condensed consolidated balance sheet (1) Gross amounts not offset in the condensed consolidated balance sheet Net amounts At September 30, 2021: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 9,932 ¥ — ¥ 9,932 ¥ (7,041) ¥ (564) ¥ 2,327 Receivables under resale agreements 14,333 (2,262) 12,071 (11,418) (24) 629 Receivables under securities borrowing transactions 3,542 (76) 3,466 (3,392) — 74 Total ¥ 27,807 ¥ (2,338) ¥ 25,469 ¥ (21,851) ¥ (588) ¥ 3,030 Financial liabilities: Derivative liabilities ¥ 9,426 ¥ — ¥ 9,426 ¥ (6,999) ¥ (1,207) ¥ 1,220 Payables under repurchase agreements 27,720 (2,231) 25,489 (24,685) (101) 703 Payables under securities lending transactions 910 (76) 834 (813) — 21 Obligations to return securities received as collateral 5,975 — 5,975 (1,494) — 4,481 Total ¥ 44,031 ¥ (2,307) ¥ 41,724 ¥ (33,991) ¥ (1,308) ¥ 6,425 Note: (1) Net amounts presented in the condensed consolidated balance sheet in the above table include Derivative assets of ¥87 billion and Derivative liabilities of ¥17 billion in transferred business of MUFG Union Bank, which is included in Other assets and Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.

Repurchase Agreements and Sec_2

Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings (Tables)	6 Months Ended
	Sep. 30, 2021
Disclosure of Repurchase Agreements [Abstract]
Gross Obligations by Remaining Contractual Maturity and Class of Collateral Pledged	March 31, 2021 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 6,006 ¥ 16,888 ¥ 1,973 ¥ 1,933 ¥ 26,800 Payables under securities lending transactions 789 26 28 — 843 Obligations to return securities received as collateral 5,607 278 528 169 6,582 Total ¥ 12,402 ¥ 17,192 ¥ 2,529 ¥ 2,102 ¥ 34,225 September 30, 2021 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 11,260 ¥ 12,161 ¥ 2,444 ¥ 1,855 ¥ 27,720 Payables under securities lending transactions 779 — 64 67 910 Obligations to return securities received as collateral 5,485 195 143 152 5,975 Total ¥ 17,524 ¥ 12,356 ¥ 2,651 ¥ 2,074 ¥ 34,605
Secured Borrowing by the Class of Collateral Pledged	Secured borrowing by the class of collateral pledged at March 31, 2021 and September 30, 2021 was as follows: March 31, 2021 Payables under repurchase agreements Payables under securities lending transactions Obligations to return securities received as collateral Total (in billions) Japanese national government and Japanese government agency bonds ¥ 7,754 ¥ 104 ¥ 4,022 ¥ 11,880 Foreign government and official institution bonds 13,914 17 738 14,669 Corporate bonds 702 1 214 917 Residential mortgage-backed securities 3,729 — — 3,729 Other debt securities 218 — 5 223 Marketable equity securities 462 721 1,603 2,786 Other 21 — — 21 Total ¥ 26,800 ¥ 843 ¥ 6,582 ¥ 34,225 September 30, 2021 Payables under repurchase agreements Payables under securities lending transactions Obligations to return securities received as collateral Total (in billions) Japanese national government and Japanese government agency bonds ¥ 7,362 ¥ 44 ¥ 3,384 ¥ 10,790 Foreign government and official institution bonds 14,171 17 794 14,982 Corporate bonds 712 67 260 1,039 Residential mortgage-backed securities 4,747 — — 4,747 Other debt securities 245 — 1 246 Marketable equity securities 444 776 1,527 2,747 Other 39 6 9 54 Total ¥ 27,720 ¥ 910 ¥ 5,975 ¥ 34,605

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes In Accumulated OCI, Net of Tax and Net of Noncontrolling Interests	The following table presents the changes in Accumulated OCI, net of tax and net of noncontrolling interests, for the six months ended September 30, 2020 and 2021: Six months ended 2020 2021 (in millions) Accumulated other comprehensive income(loss), net of taxes: Net unrealized gains (losses) on investment securities: Balance at beginning of period ¥ (344,785) ¥ (383,004) Net change during the period 54,116 (28,028) Effect of adopting new guidance on measurement of credit losses on financial instruments 34 — Balance at end of period ¥ (290,635) ¥ (411,032) Net debt valuation adjustments: Balance at beginning of period ¥ 45,502 ¥ (37,862) Net change during the period (59,324) 5,965 Balance at end of period ¥ (13,822) ¥ (31,897) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Balance at beginning of period ¥ (13,343) ¥ 19,029 Net change during the period 38,130 (5,750) Balance at end of period ¥ 24,787 ¥ 13,279 Defined benefit plans: Balance at beginning of period ¥ (337,918) ¥ (20,382) Net change during the period 27,625 (9,681) Balance at end of period ¥ (310,293) ¥ (30,063) Foreign currency translation adjustments: Balance at beginning of period ¥ 230,127 ¥ 132,738 Net change during the period (184,264) 245,484 Balance at end of period ¥ 45,863 ¥ 378,222 Balance at end of period ¥ (544,100) ¥ (81,491)
Before Tax and Net of Tax Changes in Each Component of Accumulated OCI	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, 2020 and 2021: Six months ended September 30, 2020 2021 Before tax Tax (expense) or benefit Net of tax Before tax Tax (expense) or benefit Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities ¥ 83,444 ¥ (21,968) ¥ 61,476 ¥ 19,768 ¥ (3,871) ¥ 15,897 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (1,055) (238) (1,293) (43,792) 13,390 (30,402) Net change 82,389 (22,206) 60,183 (24,024) 9,519 (14,505) Net unrealized gains on investment securities attributable to noncontrolling interests 6,067 13,523 Net unrealized gains (losses) on investment securities attributable to Mitsubishi UFJ Financial Group 54,116 (28,028) Net debt valuation adjustments: Net debt valuation adjustments (85,613) 26,214 (59,399) 8,270 (2,533) 5,737 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 108 (33) 75 329 (101) 228 Net change (85,505) 26,181 (59,324) 8,599 (2,634) 5,965 Net debt valuation adjustments attributable to noncontrolling interests — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group (59,324) 5,965 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains (losses) on derivatives qualifying for cash flow hedges 51,002 (14,013) 36,989 (1,034) 515 (519) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 1,388 (371) 1,017 (6,748) 1,691 (5,057) Net change 52,390 (14,384) 38,006 (7,782) 2,206 (5,576) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to noncontrolling interests (124) 174 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group 38,130 (5,750) Defined benefit plans: Defined benefit plans 26,092 (8,070) 18,022 (12,034) 3,385 (8,649) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 13,617 (3,871) 9,746 (1,442) 798 (644) Net change 39,709 (11,941) 27,768 (13,476) 4,183 (9,293) Defined benefit plans attributable to noncontrolling interests 143 388 Defined benefit plans attributable to Mitsubishi UFJ Financial Group 27,625 (9,681) Foreign currency translation adjustments: Foreign currency translation adjustments (214,725) 19,531 (195,194) 262,860 (13,271) 249,589 Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 797 (245) 552 1,462 (448) 1,014 Net change (213,928) 19,286 (194,642) 264,322 (13,719) 250,603 Foreign currency translation adjustments attributable to noncontrolling interests (10,378) 5,119 Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (184,264) 245,484 Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group ¥ (123,717) ¥ 207,990
Reclassification of Significant Items out of Accumulated OCI	The following table presents the effect of the reclassification of significant items out of Accumulated OCI on the respective line items of the accompanying condensed consolidated statements of income for the six months ended September 30, 2020 and 2021: Six months ended 2020 2021 Details of Accumulated OCI components Amount reclassified out of Accumulated OCI 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 debt securities ¥ (1,005) ¥ (43,692) Investment securities gains—net Other (50) (100) (1,055) (43,792) Total before tax (238) 13,390 Income tax expense ¥ (1,293) ¥ (30,402) Net of tax Net debt valuation adjustments ¥ 108 ¥ 329 Equity in earnings of equity method investees—net 108 329 Total before tax (33) (101) Income tax expense ¥ 75 ¥ 228 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ 1,236 ¥ (5,589) Interest income on Loans, including fees Foreign exchange contracts 152 (1,159) Interest expense on Long-term debt or Foreign exchange losses (gains)—net 1,388 (6,748) Total before tax (371) 1,691 Income tax expense ¥ 1,017 ¥ (5,057) Net of tax Defined benefit plans Net actuarial loss (1) ¥ 16,830 ¥ 3,425 Other non-interest expenses Prior service cost (1) (2,137) (2,161) Other non-interest expenses Gain on settlements and curtailment, and other (1) (1,076) (2,706) Other non-interest expenses 13,617 (1,442) Total before tax (3,871) 798 Income tax expense ¥ 9,746 ¥ (644) Net of tax Foreign currency translation adjustments ¥ 715 ¥ 1,462 Other non-interest income 82 — Other non-interest expenses 797 1,462 Total before tax (245) (448) Income tax expense ¥ 552 ¥ 1,014 Net of tax Total reclassifications for the period ¥ 14,855 ¥ (50,191) Total before tax (4,758) 15,330 Income tax expense ¥ 10,097 ¥ (34,861) 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 (Tables)	6 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts of Derivative Contracts	The following table summarizes the notional amounts of derivative contracts at March 31, 2021 and September 30, 2021: Notional amounts (1) March 31, September 30, 2021 (2) (in trillions) Interest rate contracts ¥ 1,308.4 ¥ 1,254.2 Foreign exchange contracts 222.0 219.8 Equity contracts 8.0 7.7 Commodity contracts 0.1 0.1 Credit derivatives 9.8 9.1 Other 3.5 3.4 Total ¥ 1,551.8 ¥ 1,494.3 Notes: (1) Includes both written and purchased positions. (2) Notional amounts in this table include those relating to transferred business of MUFG Union Bank. See Note 2 for more information.
Fair Value Information on Derivative Instruments Recorded on Condensed Consolidated Balance Sheets	Fair value of derivative instruments March 31, 2021 (1)(5) September 30, 2021 (1)(5) Not designated as hedges (2) Designated as hedges (3) Total derivatives (4) Not designated as hedges (2) Designated as hedges (3) Total derivatives (4) (7) (in billions) Derivative assets: Interest rate contracts ¥ 7,718 ¥ — ¥ 7,718 ¥ 6,430 ¥ — ¥ 6,430 Foreign exchange contracts 3,910 — 3,910 3,153 1 3,154 Equity contracts 231 — 231 216 — 216 Commodity contracts 27 — 27 24 — 24 Credit derivatives 94 — 94 95 — 95 Other (6) 17 — 17 13 — 13 Total derivative assets ¥ 11,997 ¥ — ¥ 11,997 ¥ 9,931 ¥ 1 ¥ 9,932 Derivative liabilities: Interest rate contracts ¥ 7,361 ¥ — ¥ 7,361 ¥ 6,138 ¥ — ¥ 6,138 Foreign exchange contracts 4,022 5 4,027 2,948 2 2,950 Equity contracts 237 — 237 238 — 238 Commodity contracts 27 — 27 24 — 24 Credit derivatives 109 — 109 116 — 116 Other (6) (47) — (47) (40) — (40) Total derivative liabilities ¥ 11,709 ¥ 5 ¥ 11,714 ¥ 9,424 ¥ 2 ¥ 9,426 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 liabilities except for (6). (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, 2021. (6) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, Deposits and Long-term debt. (7) This table includes Derivative assets of ¥87 billion and Derivative liabilities of ¥17 billion in transferred business of MUFG Union Bank, which is included in Other assets and Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Gains and Losses for Trading and Risk Management Derivatives (Not Designated as Hedging Instruments)	The following table provides more detailed information regarding the derivative-related impact on the accompanying condensed consolidated statements of income for the six months ended September 30, 2020 and 2021: Trading and risk management derivatives gains and losses (Not designated as hedging instruments) Foreign exchange gains (losses)—net Trading account profits (losses)—net Total (in billions) 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 (1) 9 (94) (85) Total ¥ 83 ¥ 7 ¥ 90 Six months ended September 30, 2021: Interest rate contracts ¥ — ¥ 25 ¥ 25 Foreign exchange contracts — — — Equity contracts — (115) (115) Credit derivatives — (35) (35) Other (1) (7) (22) (29) Total ¥ (7) ¥ (147) ¥ (154) Note: (1) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, Deposits and Long-term debt.
Protection Sold Through Credit Derivatives	Protection sold Maximum potential/Notional amount by expiration period Fair value At March 31, 2021: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 294,312 ¥ 2,235,390 ¥ 715,896 ¥ 3,245,598 ¥ (67,707) Non-investment grade 84,780 311,702 59,145 455,627 5,284 Not rated — 1,683 — 1,683 (83) Total 379,092 2,548,775 775,041 3,702,908 (62,506) Index and basket credit default swaps : Investment grade (2) 43,000 470,063 29,133 542,196 (4,753) Non-investment grade 35,427 65,319 — 100,746 (1,165) Not rated 59,534 29,971 852 90,357 (919) Total 137,961 565,353 29,985 733,299 (6,837) Total credit default swaps sold 517,053 3,114,128 805,026 4,436,207 (69,343) Other credit derivatives sold (3) : Investment grade (2) — 16,606 — 16,606 57 Total credit derivatives ¥ 517,053 ¥ 3,130,734 ¥ 805,026 ¥ 4,452,813 ¥ (69,286) Protection sold Maximum potential/Notional amount by expiration period Fair value At September 30, 2021: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 337,188 ¥ 1,914,711 ¥ 824,940 ¥ 3,076,839 ¥ (70,434) Non-investment grade 70,181 367,213 68,119 505,513 3,242 Not rated — — — — — Total 407,369 2,281,924 893,059 3,582,352 (67,192) Index and basket credit default swaps : Investment grade (2) 33,000 266,662 20,727 320,389 (5,843) Non-investment grade 50,364 39,172 — 89,536 (712) Not rated 57,470 46,579 894 104,943 (1,171) Total 140,834 352,413 21,621 514,868 (7,726) Total credit default swaps sold 548,203 2,634,337 914,680 4,097,220 (74,917) Other credit derivatives sold (3) : Investment grade (2) — 16,788 — 16,788 87 Total credit derivatives ¥ 548,203 ¥ 2,651,125 ¥ 914,680 ¥ 4,114,008 ¥ (74,830) 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- or higher to meet the definition of investment grade. (3) Other credit derivatives primarily consist of guarantees for exposures held by the counterparty under interest rate swaps and other types of derivative contracts.

Obligations Under Guarantees _2

Obligations Under Guarantees and Other Off-balance Sheet Instruments (Tables)	6 Months Ended
	Sep. 30, 2021
Guarantee Obligations And Other Off Balance Sheet Instruments [Abstract]
Contractual or Notional Amounts of Guarantees	The table below presents the contractual or notional amounts of such guarantees at March 31, 2021 and September 30, 2021: March 31, September 30, 2021 (3) (in billions) Standby letters of credit and financial guarantees ¥ 4,055 ¥ 4,245 Performance guarantees 3,193 3,350 Derivative instruments (1)(2) 38,499 40,425 Liabilities of trust accounts 10,656 10,411 Other 40 34 Total ¥ 56,443 ¥ 58,465 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. (3) The above table includes the credit instruments in transferred business of MUFG Union Bank at September 30.2021. See Note 2 for more informatioion.
Maximum Potential Amount of Future Payments Classified Based Upon Internal Credit Ratings	Presented in the tables below is the maximum potential amount of future payments classified based upon internal credit ratings as of March 31, 2021 and September 30, 2021. The determination of the maximum potential future payments is based on the notional amount of the guarantees without consideration of possible recoveries under recourse provisions or from collateral held or pledged. Such amounts do not represent the anticipated losses, if any, on these guarantees. At March 31, 2021: Maximum potential/ Contractual or Notional amount Amount by borrower grade Normal Close Watch (1) Likely to become Bankrupt or Legally/ Virtually Bankrupt (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 4,055 ¥ 3,929 ¥ 108 ¥ 15 ¥ 3 Performance guarantees 3,193 3,092 70 3 28 Total ¥ 7,248 ¥ 7,021 ¥ 178 ¥ 18 ¥ 31 At September 30, 2021: Maximum potential/ Contractual or Notional amount Amount by borrower grade Normal Close Watch (1) Likely to become Bankrupt or Legally/ Virtually Bankrupt (1) Not rated (in billions) Standby letters of credit and financial guarantees ¥ 4,245 ¥ 4,104 ¥ 112 ¥ 25 ¥ 4 Performance guarantees 3,350 3,258 60 3 29 Total (2) ¥ 7,595 ¥ 7,362 ¥ 172 ¥ 28 ¥ 33 Notes: (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, 2021. (2) The above table includes the credit instruments in transferred business of MUFG Union Bank of September 30.2021. See Note 2 for more information.
Contractual Amounts With Regard to Other Off Balance Sheet Instruments	The table below presents the contractual amounts with regard to such instruments at March 31, 2021 and September 30, 2021: March 31, September 30, 2021 (1) (in billions) Commitments to extend credit ¥ 84,614 ¥ 82,850 Commercial letters of credit 835 925 Commitments to make investments 281 290 Other — 1 Note: (1) The above table includes the credit instruments in transferred business of MUFG Union Bank at September 30.2021. See Note 2 for more information.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	Sep. 30, 2021
Variable Interest Entities [Abstract]
Assets and Liabilities of Variable Interest Entities	The following tables present the assets and liabilities of consolidated VIEs recorded on the accompanying condensed consolidated balance sheets at March 31, 2021 and September 30, 2021: Consolidated VIEs Consolidated assets At March 31, 2021: Total Cash and due from banks Interest-earning deposits in other banks Trading account assets Investment securities Loans All other assets (in millions) Asset-backed conduits ¥ 5,986,887 ¥ 109,439 ¥ 40,061 ¥ 5,433 ¥ 1,015,434 ¥ 4,800,221 ¥ 16,299 Investment funds 374,324 — 15,171 240,327 41,512 — 77,314 Special purpose entities created for structured financing 175,630 — 2,058 4,645 — 113,943 54,984 Repackaged instruments 281,331 3,179 — 73,914 118,199 85,782 257 Securitization of the MUFG Group’s assets 10,358,628 — 996 — — 10,339,273 18,359 Trust arrangements 9,029,390 — — 623,466 1,071,708 7,334,215 1 Other 43,320 323 3,826 17,108 — 4,660 17,403 Total consolidated assets before elimination 26,249,510 112,941 62,112 964,893 2,246,853 22,678,094 184,617 The amounts eliminated in consolidation (8,121,094) (110,243) (31,690) (5,892) (519,561) (7,430,166) (23,542) Total consolidated assets ¥ 18,128,416 ¥ 2,698 ¥ 30,422 ¥ 959,001 ¥ 1,727,292 ¥ 15,247,928 ¥ 161,075 Consolidated liabilities Total Deposits Other short-term borrowings Long-term debt All other liabilities (in millions) Asset-backed conduits ¥ 5,989,188 ¥ — ¥ 4,058,248 ¥ 1,461,043 ¥ 469,897 Investment funds 15,039 — — 5,831 9,208 Special purpose entities created for structured financing 97,226 — — 84,973 12,253 Repackaged instruments 284,795 — 21,343 195,987 67,465 Securitization of the MUFG Group’s assets 10,367,099 — 31,000 9,839,204 496,895 Trust arrangements 9,029,272 7,826,959 — — 1,202,313 Other 39,141 — 3,433 18,315 17,393 Total consolidated liabilities before elimination 25,821,760 7,826,959 4,114,024 11,605,353 2,275,424 The amounts eliminated in consolidation (14,679,458) — (2,422,978) (11,144,547) (1,111,933) The amount of liabilities with recourse to the general credit of the MUFG Group (10,547,483) (7,826,959) (1,657,447) (3,043) (1,060,034) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 594,819 ¥ — ¥ 33,599 ¥ 457,763 ¥ 103,457 Consolidated VIEs Consolidated assets At September 30, 2021: Total (1) Cash and due from banks Interest-earning deposits in other banks Trading account assets Investment securities Loans All other (in millions) Asset-backed conduits ¥ 5,536,898 ¥ 51,918 ¥ 32,902 ¥ 12,503 ¥ 838,831 ¥ 4,545,764 ¥ 54,980 Investment funds 450,215 — 17,325 290,036 46,045 — 96,809 Special purpose entities created for structured financing 174,914 — 1,298 5,211 — 119,756 48,649 Repackaged instruments 312,906 2,911 — 102,267 120,120 86,996 612 Securitization of the MUFG Group’s assets 11,019,456 — 996 — — 10,999,949 18,511 Trust arrangements 8,416,454 — — 653,599 1,213,296 6,549,558 1 Other 62,501 440 3,672 17,108 15,249 3,971 22,061 Total consolidated assets before elimination 25,973,344 55,269 56,193 1,080,724 2,233,541 22,305,994 241,623 The amounts eliminated in consolidation (7,287,803) (52,362) (25,130) (14,651) (512,502) (6,653,078) (30,080) Total consolidated assets ¥ 18,685,541 ¥ 2,907 ¥ 31,063 ¥ 1,066,073 ¥ 1,721,039 ¥ 15,652,916 ¥ 211,543 Consolidated liabilities Total (1) Deposits Other short-term borrowings Long-term debt All other (in millions) Asset-backed conduits ¥ 5,534,013 ¥ — ¥ 3,785,267 ¥ 1,310,723 ¥ 438,023 Investment funds 8,038 — — 5,868 2,170 Special purpose entities created for structured financing 93,042 — — 92,015 1,027 Repackaged instruments 313,556 — 21,107 221,026 71,423 Securitization of the MUFG Group’s assets 11,027,556 — 30,208 10,535,581 461,767 Trust arrangements 8,416,792 7,044,493 29,001 — 1,343,298 Other 58,591 — 2,796 34,560 21,235 Total consolidated liabilities before elimination 25,451,588 7,044,493 3,868,379 12,199,773 2,338,943 The amounts eliminated in consolidation (14,764,238) (2,050) (1,907,983) (11,781,009) (1,073,196) The amount of liabilities with recourse to the general credit of the MUFG Group (10,156,879) (7,042,443) (1,913,177) (3,247) (1,198,012) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 530,471 ¥ — ¥ 47,219 ¥ 415,517 ¥ 67,735 Note: (1) Consolidated VIEs in the above table include Consolidated assets of ¥8,183 million and Consolidated liabilities of ¥1,548 million in transferred business of MUFG Union Bank, which is included in Other assets and Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information. The following tables present the total assets of non-consolidated VIEs, the maximum exposure to loss resulting from the MUFG Group’s involvement with non-consolidated VIEs, and the assets and liabilities which relate to the MUFG’s variable interests in non-consolidated VIEs at March 31, 2021 and September 30, 2021: Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At March 31, 2021: Total assets Maximum exposure Total Trading account assets Investment securities Loans All other assets Total All other liabilities (in millions) Asset-backed conduits ¥ 25,491,847 ¥ 5,606,965 ¥ 4,211,342 ¥ 277 ¥ 1,598,992 ¥ 2,612,073 ¥ — ¥ — ¥ — Investment funds 102,840,486 2,646,071 2,288,210 538,190 501,434 1,213,179 35,407 114,911 114,911 Special purpose entities created for structured financing 38,771,947 4,409,839 3,254,145 476,784 25,234 2,745,441 6,686 10,447 10,447 Repackaged instruments 8,604,182 3,088,564 3,008,695 611,245 2,142,482 204,332 50,636 29,478 29,478 Other 65,455,861 3,039,135 2,176,775 198,144 — 1,915,912 62,719 24,732 24,732 Total ¥ 241,164,323 ¥ 18,790,574 ¥ 14,939,167 ¥ 1,824,640 ¥ 4,268,142 ¥ 8,690,937 ¥ 155,448 ¥ 179,568 ¥ 179,568 Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At September 30, 2021: Total assets Maximum exposure Total (1) Trading account assets Investment securities Loans All other Total All other liabilities (in millions) Asset-backed conduits ¥ 23,029,409 ¥ 5,402,493 ¥ 4,177,144 ¥ 171 ¥ 1,588,926 ¥ 2,588,047 ¥ — ¥ 33 ¥ 33 Investment funds 102,739,859 2,860,451 2,370,234 332,708 504,543 1,486,401 46,582 — — Special purpose entities created for structured financing 37,739,921 4,344,864 3,034,948 299,681 20,897 2,705,792 8,578 2,155 2,155 Repackaged instruments 8,857,947 3,120,016 3,053,769 468,240 2,259,704 273,258 52,567 — — Other 78,150,320 3,319,299 2,318,853 195,052 7,552 2,032,667 83,582 28,317 28,317 Total ¥ 250,517,456 ¥ 19,047,123 ¥ 14,954,948 ¥ 1,295,852 ¥ 4,381,622 ¥ 9,086,165 ¥ 191,309 ¥ 30,505 ¥ 30,505 Note: (1) Non-consolidated VIEs in the above table include On-balance sheet assets of ¥15,957 million in transferred business of MUFG Union Bank, which is included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.

Fees and Commissions Income (Ta

Fees and Commissions Income (Tables)	6 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Details of Fees and Commissions Income	Details of fees and commissions income for the six months ended September 30, 2020 and 2021 are as follows: 2020 2021 (in millions) Fees and commissions on deposits ¥ 26,221 ¥ 25,847 Fees and commissions on remittances and transfers 82,125 83,029 Fees and commissions on foreign trading business 29,195 33,903 Fees and commissions on credit card business 96,131 99,738 Fees and commissions on security-related services 121,629 132,161 Fees and commissions on administration and management services for investment funds 106,186 145,660 Trust fees 61,003 66,120 Guarantee fees (1) 22,802 22,431 Insurance commissions 19,444 20,763 Fees and commissions on real estate business 13,917 20,392 Other fees and commissions (2) 121,119 148,021 Total ¥ 699,772 ¥ 798,065 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 financing related fees that are not within the scope of the guidance on revenue from contracts with customers.

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Financial Information by Business Segment	Customer Business Digital Retail & Japanese Global Asset Global Total Global Other Total (in billions) Six months ended September 30, 2020: Net revenue: ¥ 365.4 ¥ 251.9 ¥ 252.2 ¥ 415.4 ¥ 138.2 ¥ 199.6 ¥ 1,622.7 ¥ 464.8 ¥ 8.6 ¥ 2,096.1 BK and TB (1) : 128.7 168.8 199.3 0.5 46.8 120.4 664.5 344.8 37.7 1,047.0 Net interest income 113.3 81.9 81.0 0.6 2.2 60.7 339.7 104.7 44.3 488.7 Net fees 14.1 78.7 95.7 — 44.7 67.5 300.7 1.4 (29.4) 272.7 Other 1.3 8.2 22.6 (0.1) (0.1) (7.8) 24.1 238.7 22.8 285.6 Other than BK and TB 236.7 83.1 52.9 414.9 91.4 79.2 958.2 120.0 (29.1) 1,049.1 Operating expenses 271.9 247.4 155.5 263.5 102.9 131.5 1,172.7 114.7 75.6 1,363.0 Operating profit (loss) ¥ 93.5 ¥ 4.5 ¥ 96.7 ¥ 151.9 ¥ 35.3 ¥ 68.1 ¥ 450.0 ¥ 350.1 ¥ (67.0) ¥ 733.1 Six months ended September 30, 2021: Net revenue: ¥ 364.5 ¥ 287.5 ¥ 264.7 ¥ 376.8 ¥ 176.1 ¥ 231.5 ¥ 1,701.1 ¥ 280.8 ¥ 31.6 ¥ 2,013.5 BK and TB (1) : 133.2 181.5 205.8 0.9 52.7 155.8 729.9 192.1 72.6 994.6 Net interest income 110.0 82.1 96.0 0.9 4.1 73.1 366.2 127.7 88.4 582.3 Net fees 20.2 90.0 87.3 — 48.6 82.3 328.4 (4.5) (31.3) 292.6 Other 3.0 9.4 22.5 — — 0.4 35.3 68.9 15.5 119.7 Other than BK and TB 231.3 106.0 58.9 375.9 123.4 75.7 971.2 88.7 (41.0) 1,018.9 Operating expenses 276.2 247.8 156.3 267.2 118.4 139.2 1,205.1 118.2 56.1 1,379.4 Operating profit (loss) ¥ 88.3 ¥ 39.7 ¥ 108.4 ¥ 109.6 ¥ 57.7 ¥ 92.3 ¥ 496.0 ¥ 162.6 ¥ (24.5) ¥ 634.1 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	A reconciliation of operating profit under the internal management reporting system for the six months ended September 30, 2020 and 2021 above to income before income tax expense shown in the accompanying condensed consolidated statements of income is as follows: Six months ended 2020 2021 (in billions) Operating profit ¥ 733 ¥ 634 Reversal of (Provision for) credit losses (210) 11 Foreign exchange gains (losses)—net 87 (46) Trading account profits —net 83 4 Equity investment securities gains—net 694 289 Debt investment securities losses—net (204) (24) Equity in earnings of equity method investees—net 140 216 Impairment of goodwill (106) — Reversal of off-balance sheet credit instruments 37 6 Other—net (108) (39) Income before income tax expense ¥ 1,146 ¥ 1,051

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables present the financial instruments carried at fair value by level within the fair value hierarchy as of March 31, 2021 and September 30, 2021: At March 31, 2021 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 18,439,146 ¥ 13,165,127 ¥ 756,413 ¥ 32,360,686 Debt securities Japanese national government and Japanese government agency bonds 6,800,379 401,454 — 7,201,833 Japanese prefectural and municipal bonds — 193,936 — 193,936 Foreign government and official institution bonds 9,508,030 450,443 1,280 9,959,753 Corporate bonds 5,123 2,706,611 77 2,711,811 Residential mortgage-backed securities 27 6,166,313 1,000 6,167,340 Asset-backed securities — 1,045,706 336,811 1,382,517 Other debt securities — — 277,635 277,635 Commercial paper — 1,001,233 — 1,001,233 Equity securities (2) 2,125,587 1,199,431 139,610 3,464,628 Trading derivative assets 136,515 11,774,865 70,058 11,981,438 Interest rate contracts 23,906 7,673,031 21,018 7,717,955 Foreign exchange contracts 929 3,896,713 12,520 3,910,162 Equity contracts 111,680 113,586 6,309 231,575 Commodity contracts — 1 26,896 26,897 Credit derivatives — 91,534 2,354 93,888 Other (7) — — 961 961 Investment securities: Available-for-sale debt securities 34,010,613 12,817,584 289,616 47,117,813 Japanese national government and Japanese government agency bonds 32,073,409 3,199,802 — 35,273,211 Japanese prefectural and municipal bonds — 3,731,513 — 3,731,513 Foreign government and official institution bonds 1,937,204 973,041 16,718 2,926,963 Corporate bonds — 1,134,108 162 1,134,270 Residential mortgage-backed securities — 1,467,115 15 1,467,130 Commercial mortgage-backed securities — 462,966 1,599 464,565 Asset-backed securities — 1,247,565 136,920 1,384,485 Other debt securities — 37,376 134,202 171,578 Commercial paper — 564,098 — 564,098 Equity securities 5,530,077 229,415 45,569 5,805,061 Marketable equity securities 5,530,077 229,415 — 5,759,492 Nonmarketable equity securities (3) — — 45,569 45,569 Other (4) 1,202,230 42,687 18,784 1,263,701 Total ¥ 59,318,581 ¥ 38,029,678 ¥ 1,180,440 ¥ 98,528,699 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 260,149 ¥ 989 ¥ — ¥ 261,138 Trading derivative liabilities 150,750 11,560,634 45,031 11,756,415 Interest rate contracts 10,696 7,343,594 6,839 7,361,129 Foreign exchange contracts 977 4,015,927 5,237 4,022,141 Equity contracts 139,077 92,655 5,686 237,418 Commodity contracts — 1 26,959 26,960 Credit derivatives — 108,457 83 108,540 Other (7) — — 227 227 Obligation to return securities received as collateral (5) 6,484,452 97,307 — 6,581,759 Other (6) — 558,553 (2,212) 556,341 Total ¥ 6,895,351 ¥ 12,217,483 ¥ 42,819 ¥ 19,155,653 At September 30, 2021 Level 1 Level 2 Level 3 Fair Value (8) (in millions) Assets Trading account assets: Trading securities (1) ¥ 19,693,104 ¥ 14,976,853 ¥ 699,598 ¥ 35,369,555 Debt securities Japanese national government and Japanese government agency bonds 7,271,079 342,429 — 7,613,508 Japanese prefectural and municipal bonds — 136,983 — 136,983 Foreign government and official institution bonds 10,285,602 424,816 1,433 10,711,851 Corporate bonds 4,222 2,830,826 683 2,835,731 Residential mortgage-backed securities — 7,788,583 — 7,788,583 Asset-backed securities — 1,118,202 256,014 1,374,216 Other debt securities — — 279,952 279,952 Commercial paper — 1,237,124 — 1,237,124 Equity securities (2) 2,132,201 1,097,890 161,516 3,391,607 Trading derivative assets 143,235 9,707,756 67,846 9,918,837 Interest rate contracts 26,988 6,375,295 27,717 6,430,000 Foreign exchange contracts 2,136 3,145,866 5,341 3,153,343 Equity contracts 114,111 93,698 8,138 215,947 Commodity contracts — — 23,642 23,642 Credit derivatives — 92,897 2,323 95,220 Other (7) — — 685 685 Investment securities: Available-for-sale debt securities 34,410,091 14,679,359 275,505 49,364,955 Japanese national government and Japanese government agency bonds 32,188,385 4,026,614 — 36,214,999 Japanese prefectural and municipal bonds — 4,016,073 — 4,016,073 Foreign government and official institution bonds 2,221,706 1,153,086 17,468 3,392,260 Corporate bonds — 1,086,177 3,148 1,089,325 Residential mortgage-backed securities — 1,704,987 15 1,705,002 Commercial mortgage-backed securities — 494,189 1,179 495,368 Asset-backed securities — 1,285,923 116,806 1,402,729 Other debt securities — 40,190 136,889 177,079 Commercial Paper — 872,120 — 872,120 Equity securities 5,640,412 196,343 50,150 5,886,905 Marketable equity securities 5,640,412 196,343 — 5,836,755 Nonmarketable equity securities (3) — — 50,150 50,150 Other (4) 830,251 21,922 15,544 867,717 Total ¥ 60,717,093 ¥ 39,582,233 ¥ 1,108,643 ¥ 101,407,969 Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 73,815 ¥ 5,453 ¥ — ¥ 79,268 Trading derivative liabilities 142,480 9,283,194 39,370 9,465,044 Interest rate contracts 10,020 6,122,010 6,129 6,138,159 Foreign exchange contracts 981 2,944,304 3,143 2,948,428 Equity contracts 131,479 100,806 5,995 238,280 Commodity contracts — — 23,695 23,695 Credit derivatives — 116,074 88 116,162 Other (7) — — 320 320 Obligation to return securities received as collateral (5) 5,869,080 105,722 — 5,974,802 Other (6) — 491,802 3,576 495,378 Total ¥ 6,085,375 ¥ 9,886,171 ¥ 42,946 ¥ 16,014,492 Notes: (1) Includes securities measured under the fair value option. (2) Excludes certain investments valued at net asset value of private equity funds whose fair values at March 31, 2021 were ¥102,255 million and those at September 30, 2021 were ¥135,905 million, respectively. The amounts of unfunded commitments related to these private equity funds at March 31, 2021 were ¥97,413 million, and those at September 30, 2021 were ¥84,769 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, 2021. (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, 2021 were ¥27,395 million and ¥34,390 million respectively, and those at September 30, 2021 were ¥27,726 million and ¥38,207 million respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2021 were ¥1,006 million and ¥4,758 millions, respectively, and those at September 30, 2021 were ¥1,023 million and ¥8,927 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, 2021. (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) Includes certain derivatives such as earthquake derivatives. (8) Fair value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Trading derivative assets of ¥86,916 million, Available-for-sale debt securities of ¥2,265,674 million, Equity securities of ¥2,733 million and Other of ¥12,053 million, which are included in Other assets, and Trading derivative liabilities of ¥17,250 million, which are included in Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Changes in Level 3 Recurring Fair Value Measurements	Accordingly, the gains and losses in the tables below include changes in fair value due in part to observable inputs used in the valuation techniques. Total gains (losses) Change in unrealized gains (losses) for assets and liabilities still held at September 30, 2020 March 31, 2020 Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2020 (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 debt securities 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) Total gains (losses) Change in unrealized gains(losses) for assets and liabilities still held at September 30, 2021 March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2021 (10) (in millions) Assets Trading account assets: Trading securities (1) ¥ 756,413 ¥ 4,592 (2) ¥ — ¥ 268,583 ¥ — ¥ (71,430) ¥ (259,220) ¥ 660 ¥ — ¥ 699,598 ¥ 4,423 (2) Debt securities Foreign government and official institution bonds 1,280 210 — 28,427 — (28,469) (15) — — 1,433 (16) Corporate bonds 77 (69) — 125 — (100) — 650 — 683 (69) Residential mortgage-backed securities 1,000 (2) — 41,844 — (42,823) (19) — — — — Asset-backed securities 336,811 4,193 — 166,760 — — (251,750) — — 256,014 5,297 Other debt securities 277,635 2,317 — — — — — — — 279,952 2,317 Equity securities 139,610 (2,057) — 31,427 — (38) (7,436) 10 — 161,516 (3,106) Trading derivatives—net 25,027 17,711 (2) 1,113 36 (355) — (9,069) (463) (5,524) 28,476 15,161 (2) Interest rate contracts—net 14,179 3,916 653 — — — 2,634 8 198 21,588 3,764 Foreign exchange contracts—net 7,283 302 147 21 — — 773 (471) (5,857) 2,198 369 Equity contracts—net 623 13,378 319 15 — — (12,327) — 135 2,143 10,907 Commodity contracts—net (63) 16 (6) — — — — — — (53) 16 Credit derivatives—net 2,271 113 — — — — (149) — — 2,235 113 Other—net (9) 734 (14) — — (355) — — — — 365 (8) Investment securities: Available-for-sale debt securities 289,616 (618) (3) 22,746 118,700 — — (170,482) 15,653 (110) 275,505 7,452 (3) Foreign government and official institution bonds 16,718 — 1,104 4,805 — — (5,159) — — 17,468 (30) Corporate bonds 162 (326) 68 557 — — (57) 2,854 (110) 3,148 (261) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 1,599 — 104 — — — (524) — — 1,179 9 Asset-backed securities 136,920 (292) 8,690 113,311 — — (141,823) — — 116,806 3,495 Other debt securities 134,202 — 12,780 27 — — (22,919) 12,799 (8) — 136,889 4,239 Equity securities 45,569 2,588 (3) — 3,602 — (1,317) — 130 (422) 50,150 1,614 (3) Nonmarketable equity securities 45,569 2,588 — 3,602 — (1,317) — 130 (422) 50,150 1,614 Other 18,784 (1,383) (7) 986 1,758 — (4,523) (57) — (21) 15,544 (1,382) (7) Total ¥ 1,135,409 ¥ 22,890 ¥ 24,845 ¥ 392,679 ¥ (355) ¥ (77,270) ¥ (438,828) ¥ 15,980 ¥ (6,077) ¥ 1,069,273 ¥ 27,268 Liabilities Other ¥ (2,212) ¥ (8,176) (4) ¥ (2,341) ¥ — ¥ 8,145 ¥ — ¥ (12,450) ¥ 6,809 (6) ¥ (7,233) (6) ¥ 3,576 ¥ (2,656) (4) Total ¥ (2,212) ¥ (8,176) ¥ (2,341) ¥ — ¥ 8,145 ¥ — ¥ (12,450) ¥ 6,809 ¥ (7,233) ¥ 3,576 ¥ (2,656) Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account profits—net and Foreign exchange gains—net. (3) Included in Investment securities gains—net and Other comprehensive income—net. (4) Included in Trading account profits—net. (5) 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 long-term debt 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 income. (8) Transfers relate to the reclassification of certain securities. (9) Includes certain derivatives such as earthquake derivatives. (10) Fair value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Available-for-sale debt securities of ¥67,266 million and Other of ¥12,053 million, which are included in Other assets, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Quantitative Information About Level 3 Fair Value Measurements	The following tables present information on the valuation techniques, significant unobservable inputs and their ranges for each major category of assets and liabilities measured at fair value on a recurring basis and classified in Level 3: At March 31, 2021 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 16,718 Return on Equity Method Probability of default 0.2 % ~ 1.8 % 0.5 % Recovery rate 35.0 % ~ 90.0 % 66.9 % Market-required return on capital 8.0 % ~ 10.0 % 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 89,607 Discounted cash flow Probability of default 4.3 % ~ 4.9 % 4.7 % Recovery rate 78.0 % ~ 96.6 % 90.6 % 279,547 Internal model (4) Asset Correlations 3.0% 3.0 % Discount factor 1.3 % ~ 1.6 % 1.3 % Prepayment rate 18.3% 18.3 % Probability of default 0.0 % ~ 83.7 % — (3) Recovery rate 57.4% 57.4 % Other debt securities 313,895 Discounted cash flow Liquidity premium 1.0 % ~ 3.2 % 2.9 % 79,541 Return on Equity Method Probability of default 0.0 % ~ 8.0 % 0.4 % Recovery rate 60.0 % ~ 90.0 % 78.8 % Market-required return on capital 8.0 % ~ 10.0 % 10.0 % At March 31, 2021 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 12,841 Option model Correlation between interest rates 30.0 % ~ 61.9 % 44.8 % Correlation between interest rate and foreign exchange rate 15.1 % ~ 60.0 % 41.6 % Volatility 0.0 % ~ 100.0 % 65.0 % Foreign exchange contracts—net 7,283 Option model Correlation between interest rates 10.0 % ~ 70.0 % 51.0 % Correlation between interest rate and foreign exchange rate 0.0 % ~ 60.0 % 38.9 % Correlation between foreign exchange rates 50.0 % ~ 70.6 % 66.4 % Volatility 9.5 % ~ 22.1 % 13.7 % Equity contracts—net (4,597) Option model Correlation between foreign exchange rate and equity (58.4) % ~ 55.0 % 26.2 % Correlation between equities 15.0 % ~ 95.0 % 54.0 % Volatility 27.5 % ~ 40.0 % 31.8 % 5,557 Discounted Cash Flow Term of litigation 0.0 year ~ 1.2 years 0.6 year At September 30, 2021 Fair value (1)(5) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 17,468 Return on equity method Probability of default 0.2 % ~ 1.8 % 0.5 % Recovery rate 55.0 % ~ 90.0 % 67.0 % Market-required return on capital 10.0% 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 79,934 Discounted cash flow Recovery rate 100.0% 100.0 % 190,785 Internal model (4) Asset correlations 3.0% 3.0 % Discount factor 0.7 % ~ 0.9 % 0.9 % Prepayment rate 24.2% 24.2 % Probability of default 0.0 % ~ 85.9 % — (3) Recovery rate 60.0% 60.0 % Other debt securities 318,343 Discounted cash flow Liquidity premium 1.2 % ~ 3.2 % 3.0 % 60,867 Return on equity method Probability of default 0.1 % ~ 4.1 % 0.3 % Recovery rate 70.0 % ~ 90.0 % 83.3 % Market-required return on capital 8.0 % ~ 10.0 % 10.0 % At September 30, 2021 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 20,791 Option model Correlation between interest rates 30.0 % ~ 65.4 % 45.8 % Correlation between interest rate and foreign exchange rate 16.6 % ~ 60.0 % 41.5 % Volatility 13.0 % ~ 100.0 % 58.1 % Foreign exchange contracts—net 2,198 Option model Correlation between interest rates 30.0 % ~ 70.0 % 57.0 % Correlation between interest rate and foreign exchange rate 0.0 % ~ 60.0 % 39.1 % Correlation between foreign exchange rates 50.0 % 70.6 % 66.4 % Volatility 9.3 % ~ 22.5 % 14.0 % Equity contracts—net (3,540) Option model Correlation between foreign exchange rate and equity (58.4) % ~ 55.0 % 20.0 % Correlation between equities 14.9 % ~ 95.0 % 56.5 % Volatility 26.0 % ~ 35.5 % 28.8 % 6,441 Discounted cash flow Term of litigation 0.1 year ~ 1.3 years 0.7 year Notes: (1) The fair value as of March 31, 2021 and September 30, 2021 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) See “Probability of default” in “Change in and range of unobservable inputs” in Note 31 to the consolidated financial statements for the fiscal year ended March 31, 2021. (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, 2021. (5) Fair value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Trading securities and Investment securities of ¥66,087 million, which are included in Other assets, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
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, 2021 and September 30, 2021: March 31, 2021 September 30, 2021 Level 1 Level 2 Level 3 Total carrying value Level 1 Level 2 Level 3 Total carrying value (3) (in millions) Assets Investment securities (1)(2) ¥ — ¥ 32,421 ¥ 8,357 ¥ 40,778 ¥ — ¥ 8,189 ¥ 5,034 ¥ 13,223 Loans 2,667 5,125 255,676 263,468 2,378 4,359 245,697 252,434 Loans held for sale — — 52,159 52,159 — — 42,254 42,254 Collateral dependent loans 2,667 5,125 203,517 211,309 2,378 4,359 203,443 210,180 Premises and equipment — — 15,243 15,243 — — 11,800 11,800 Intangible assets — — 2,421 2,421 — — 10,377 10,377 Goodwill — — 132,976 132,976 — — — — Other assets 111,626 33,840 24,512 169,978 11,880 — 15,168 27,048 Investments in equity method investees (1) 111,626 33,840 8,384 153,850 11,880 — — 11,880 Other — — 16,128 16,128 — — 15,168 15,168 Total ¥ 114,293 ¥ 71,386 ¥ 439,185 ¥ 624,864 ¥ 14,258 ¥ 12,548 ¥ 288,076 ¥ 314,882 Notes: (1) Excludes certain investments valued at net asset value of ¥24,319 million and ¥19,475 million at March 31, 2021 and September 30, 2021, respectively. The unfunded commitments related to these investments are ¥19,101 million and ¥18,494 million at March 31, 2021 and September 30, 2021, 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, 2021. (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. (3) Carrying value amounts in this table include those relating to transferred business of MUFG Union Bank, such as Intangible assets of ¥10,273 million, which are included in Other assets in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.
Losses Gains Recorded As Result Of Nonrecurring Changes In Fair Value	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, 2020 and 2021: Losses(gains) for the six months ended September 30, 2020 2021 (in millions) Investment securities ¥ (701) ¥ 1,759 Loans 89,082 15,777 Loans held for sale 5,620 759 Collateral dependent loans 83,462 15,018 Premises and equipment 8,569 1,660 Intangible assets 4,286 17,459 Goodwill 106,479 — Other assets 87,584 17,500 Investments in equity method investees 53,138 7,020 Other 34,446 10,480 Total ¥ 295,299 ¥ 54,155
Gains (Losses) Related to Instruments for which Fair Value Option was Elected	The following table presents the gains or losses recorded for the six months ended September 30, 2020 and 2021 related to the eligible instruments for which the MUFG Group elected the fair value option: Six months ended September 30, 2020 2021 Trading account profits (losses) Foreign exchange gains (losses) Total changes in fair value Trading account profits (losses) Foreign exchange gains (losses) Total changes in fair value (in millions) Financial assets: Trading account securities ¥ 148,265 ¥ (237,425) ¥ (89,160) ¥ 41,324 ¥ 121,942 ¥ 163,266 Total ¥ 148,265 ¥ (237,425) ¥ (89,160) ¥ 41,324 ¥ 121,942 ¥ 163,266 Financial liabilities: Other short-term borrowings (1) ¥ (15,805) ¥ — ¥ (15,805) ¥ 4,383 ¥ — ¥ 4,383 Long-term debt (1) (16,945) — (16,945) 32,402 — 32,402 Total ¥ (32,750) ¥ — ¥ (32,750) ¥ 36,785 ¥ — ¥ 36,785 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 Balance Of Long Term Receivables And Debt Instruments For Which Fair Value Option Was Elected	The following table presents the differences between the aggregate fair value and the aggregate remaining contractual principal balance outstanding as of March 31, 2021 and September 30, 2021 for long-term debt instruments for which the fair value option has been elected: March 31, 2021 September 30, 2021 Remaining aggregate contractual amounts outstanding Fair value Fair value over (under) remaining aggregate contractual amounts outstanding Remaining aggregate contractual amounts outstanding Fair value Fair value over (under) remaining aggregate contractual amounts outstanding (in millions) Financial liabilities: Long-term debt ¥ 420,227 ¥ 402,823 ¥ (17,404) ¥ 513,292 ¥ 499,929 ¥ (13,363) Total ¥ 420,227 ¥ 402,823 ¥ (17,404) ¥ 513,292 ¥ 499,929 ¥ (13,363)
Estimated Fair Values by Level	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, 2021 and September 30, 2021: At March 31, 2021 Carrying amount Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 49,977 ¥ 49,977 ¥ 49,977 ¥ — ¥ — Interest-earning deposits in other banks 53,347 53,347 — 53,347 — Call loans and funds sold 1,256 1,256 — 1,256 — Receivables under resale agreements 13,780 13,780 — 13,780 — Receivables under securities borrowing transactions 3,370 3,370 — 3,370 — Investment securities 3,904 3,939 1,123 780 2,036 Loans, net of allowance for credit losses (1) 114,350 115,709 3 298 115,408 Other financial assets (2) 8,108 8,108 — 8,108 — Financial liabilities: Deposits Non-interest-bearing ¥ 38,521 ¥ 38,521 ¥ — ¥ 38,521 ¥ — Interest-bearing 190,695 190,712 — 190,712 — Total deposits 229,216 229,233 — 229,233 — Call money and funds purchased 2,354 2,354 — 2,354 — Payables under repurchase agreements 24,568 24,568 — 24,568 — Payables under securities lending transactions 843 843 — 843 — Due to trust account and other short-term borrowings 17,883 17,883 — 17,883 — Long-term debt 34,773 35,042 — 35,042 — Other financial liabilities 7,027 7,027 — 7,027 — At September 30, 2021 Carrying amount (3) Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 50,694 ¥ 50,694 ¥ 50,694 ¥ — ¥ — Interest-earning deposits in other banks 54,429 54,429 — 54,429 — Call loans and funds sold 1,456 1,456 — 1,456 — Receivables under resale agreements 12,071 12,071 — 12,071 — Receivables under securities borrowing transactions 3,466 3,466 — 3,466 — Investment securities 4,130 4,172 1,120 867 2,185 Loans, net of allowance for credit losses (1) 111,527 112,821 2 305 112,514 Other financial assets (2) 7,064 7,064 — 7,064 — Financial liabilities: Deposits Non-interest-bearing ¥ 39,174 ¥ 39,174 ¥ — ¥ 39,174 ¥ — Interest-bearing 190,708 190,718 — 190,718 — Total deposits 229,882 229,892 — 229,892 — Call money and funds purchased 2,580 2,580 — 2,580 — Payables under repurchase agreements 25,489 25,489 — 25,489 — Payables under securities lending transactions 834 834 — 834 — Due to trust account and other short-term borrowings 18,069 18,069 — 18,069 — Long-term debt 33,705 34,011 — 34,011 — Other financial liabilities 8,196 8,196 — 8,196 — 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 ¥2,560 billion and ¥2,774 billion at March 31, 2021 and September 30, 2021, respectively. (3) Carrying amounts in this table include those relating to transferred business of MUFG Union Bank, such as Cash and due from banks of ¥224 billion, Interest-earning deposits in other banks of ¥1,288 billion, Investment securities of ¥858 billion, Loans, net of allowance for credit losses of ¥6,360 billion and Other financial assets of ¥310 billion, which are included in Other assets, and Total deposits of ¥9,933 billion, Long-term debt of ¥705 billion and Other financial liabilities of ¥160 billion, which are included in Other liabilities, respectively, in the accompanying condensed consolidated balance sheets at September 30, 2021. See Note 2 for more information.

Investments in Equity Method _2

Investments in Equity Method Investees (Tables)	6 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Summarized Operating Results of Morgan Stanley	Summarized operating results of Morgan Stanley, the largest portion of the MUFG Group’s equity method investees, for the six months ended September 30, 2020 and 2021 are as follows: 2020 2021 (in billions) Net revenues ¥ 2,714 ¥ 3,240 Total non-interest expenses 1,838 2,193 Income from continuing operations before income taxes 838 1,037 Net income applicable to Morgan Stanley 632 793

Business Developments - Narrati

Business Developments - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
U.S. Bancorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage	2.90%
MUFG Union Bank | U.S. Bancorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration	$ 8,000
Payment in cash	$ 5,500
Shares issued in business combination	44,374,155
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, transaction value	$ 17,600
Capital to be distributed through a dividend or share repurchase	$ 9,600
Income (loss) from discontinued operation before income tax		$ 70,029	$ 57,321

Business Developments - Assets

Business Developments - Assets and liabilities (Details) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Sep. 30, 2020
Assets held for sale:
Total	¥ 10,193,119	¥ 0
Liabilities held for sale:
Total	10,874,609	¥ 0
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Assets held for sale:
Interest-earning deposits in other banks	1,288,478
Investment securities	3,127,206
Loans, net of allowance for credit losses	6,359,733
Other	933,078
Total	11,708,495
Liabilities held for sale:
Deposits	9,933,030
Other	941,579
Total	¥ 10,874,609

Investment Securities (Amortize

Investment Securities (Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	¥ 49,150,049	¥ 46,863,845
Available-for-sale debt securities, Gross unrealized gains	266,483	313,191
Available-for-sale debt securities, Gross unrealized losses	51,577	59,223
Available-for-sale debt securities	47,099,281	47,117,813
Total	49,364,955
Total	3,271,606	3,903,763
Held-to-maturity debt securities, Gross unrealized gains	53,325	50,452
Held-to-maturity debt securities, Gross unrealized losses	11,262	15,072
Held-to-maturity debt securities, Fair value	3,304,908	3,939,143
Total	4,129,596
Held-to-maturity debt securities, fair value before disposal group reclassification	4,171,659
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Investment Securities [Line Items]
Available-for-sale debt securities	2,265,674
Total	857,990
Held-to-maturity debt securities, Fair value	866,751
Japanese national government and Japanese government agency bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	36,114,443	35,166,245
Available-for-sale debt securities, Gross unrealized gains	119,213	147,844
Available-for-sale debt securities, Gross unrealized losses	18,657	40,878
Available-for-sale debt securities	36,214,999	35,273,211
Total	1,100,384	1,100,447
Held-to-maturity debt securities, Gross unrealized gains	19,116	23,033
Held-to-maturity debt securities, Gross unrealized losses	0	0
Held-to-maturity debt securities, Fair value	1,119,500	1,123,480
Japanese prefectural and municipal bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	4,002,464	3,719,205
Available-for-sale debt securities, Gross unrealized gains	15,214	15,123
Available-for-sale debt securities, Gross unrealized losses	1,605	2,815
Available-for-sale debt securities	4,016,073	3,731,513
Foreign government and official institution bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	3,343,700	2,854,037
Available-for-sale debt securities, Gross unrealized gains	68,416	84,707
Available-for-sale debt securities, Gross unrealized losses	19,856	11,781
Available-for-sale debt securities	3,392,260	2,926,963
Total	444,070	233,883
Held-to-maturity debt securities, Gross unrealized gains	1,875	2,262
Held-to-maturity debt securities, Gross unrealized losses	9,731	2,795
Held-to-maturity debt securities, Fair value	436,214	233,350
Corporate bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,077,930	1,123,271
Available-for-sale debt securities, Gross unrealized gains	11,631	11,400
Available-for-sale debt securities, Gross unrealized losses	236	401
Available-for-sale debt securities	1,089,325	1,134,270
Residential mortgage-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,706,456	1,459,062
Available-for-sale debt securities, Gross unrealized gains	6,714	9,119
Available-for-sale debt securities, Gross unrealized losses	8,168	1,051
Available-for-sale debt securities	1,705,002	1,467,130
Total	309,905	411,024
Held-to-maturity debt securities, Gross unrealized gains	13,136	18,590
Held-to-maturity debt securities, Gross unrealized losses	0	0
Held-to-maturity debt securities, Fair value	323,041	429,614
Residential mortgage-backed securities | MUAH
Investment Securities [Line Items]
Unrealized losses before taxes from available-for-sale to held-to-maturity debt securities remaining in accumulated OCI	3,732	4,849
Commercial mortgage-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	475,797	435,975
Available-for-sale debt securities, Gross unrealized gains	21,786	29,502
Available-for-sale debt securities, Gross unrealized losses	2,215	912
Available-for-sale debt securities	495,368	464,565
Total	104,015	111,750
Held-to-maturity debt securities, Gross unrealized gains	3,480	4,846
Held-to-maturity debt securities, Gross unrealized losses	0	0
Held-to-maturity debt securities, Fair value	107,495	116,596
Commercial mortgage-backed securities | MUAH
Investment Securities [Line Items]
Unrealized losses before taxes from available-for-sale to held-to-maturity debt securities remaining in accumulated OCI	1,549	1,920
Asset-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,387,750	1,373,450
Available-for-sale debt securities, Gross unrealized gains	15,158	11,685
Available-for-sale debt securities, Gross unrealized losses	179	650
Available-for-sale debt securities	1,402,729	1,384,485
Total	2,171,222	2,046,659
Held-to-maturity debt securities, Gross unrealized gains	15,718	1,721
Held-to-maturity debt securities, Gross unrealized losses	1,531	12,277
Held-to-maturity debt securities, Fair value	2,185,409	2,036,103
Other debt securities
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	169,413	168,528
Available-for-sale debt securities, Gross unrealized gains	8,305	3,780
Available-for-sale debt securities, Gross unrealized losses	639	730
Available-for-sale debt securities	177,079	171,578
Commercial paper
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	872,096	564,072
Available-for-sale debt securities, Gross unrealized gains	46	31
Available-for-sale debt securities, Gross unrealized losses	22	5
Available-for-sale debt securities	¥ 872,120	¥ 564,098

Investment Securities (Amorti_2

Investment Securities (Amortized Cost and Fair Value by Contractual Maturity) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Held-to-maturity debt securities, Amortized cost:
Due in one year or less	¥ 33,628
Due from one year to five years	1,151,974
Due from five years to ten years	1,287,456
Due after ten years	1,656,538
Total	4,129,596
Held-to-maturity debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥105,029 and ¥105,025 at March 31, 2021 and September 30, 2021) (fair value of ¥3,939,143 and ¥3,304,908 at March 31, 2021 and September 30, 2021)	3,271,606	¥ 3,903,763
Held-to-maturity debt securities, Fair value:
Due in one year or less	34,077
Due from one year to five years	1,172,776
Due from five years to ten years	1,295,231
Due after ten years	1,669,575
Total	4,171,659
Available-for-sale debt securities, Fair value:
Due in one year or less	26,058,777
Due from one year to five years	9,517,496
Due from five years to ten years	7,723,907
Due after ten years	6,064,775
Total	49,364,955
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Held-to-maturity debt securities, Amortized cost:
Held-to-maturity debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥105,029 and ¥105,025 at March 31, 2021 and September 30, 2021) (fair value of ¥3,939,143 and ¥3,304,908 at March 31, 2021 and September 30, 2021)	¥ 857,990

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail) - JPY (¥)	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Investment Securities [Line Items]
Gross realized gains on sales of Available-for-sale debt securities	¥ 61,902,000,000	¥ 23,566,000,000
Gross realized losses on sales of Available-for-sale debt securities	18,169,000,000	¥ 22,621,000,000
Other debt securities
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities	¥ 0

Investment Securities (Investme

Investment Securities (Investments by Length and Category in Continuous Loss Position) (Detail) ¥ in Millions	Sep. 30, 2021JPY (¥)Securities	Mar. 31, 2021JPY (¥)Securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 28,307,546	¥ 14,238,837
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	44,960	46,545
Available-for-sale debt securities, Fair value, 12 months or more	830,696	1,199,049
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	6,617	12,678
Available-for-sale debt securities, Fair value, Total	29,138,242	15,437,886
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 51,577	¥ 59,223
Available-for-sale debt securities, Number of securities | Securities	1,239	1,235
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Total	¥ 1,056,529
Japanese national government and Japanese government agency bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	24,712,396	¥ 12,098,437
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	13,802	31,055
Available-for-sale debt securities, Fair value, 12 months or more	390,498	429,235
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	4,855	9,823
Available-for-sale debt securities, Fair value, Total	25,102,894	12,527,672
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 18,657	¥ 40,878
Available-for-sale debt securities, Number of securities | Securities	240	286
Japanese prefectural and municipal bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 1,004,671	¥ 870,007
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,543	1,584
Available-for-sale debt securities, Fair value, 12 months or more	32,551	276,172
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	62	1,231
Available-for-sale debt securities, Fair value, Total	1,037,222	1,146,179
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,605	¥ 2,815
Available-for-sale debt securities, Number of securities | Securities	389	405
Foreign government and official institution bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 1,010,780	¥ 429,204
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	19,776	11,768
Available-for-sale debt securities, Fair value, 12 months or more	68,312	50,478
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	80	13
Available-for-sale debt securities, Fair value, Total	1,079,092	479,682
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 19,856	¥ 11,781
Available-for-sale debt securities, Number of securities | Securities	158	71
Corporate bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 145,240	¥ 96,582
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	117	166
Available-for-sale debt securities, Fair value, 12 months or more	121,171	229,518
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	119	235
Available-for-sale debt securities, Fair value, Total	266,411	326,100
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 236	¥ 401
Available-for-sale debt securities, Number of securities | Securities	98	120
Residential mortgage-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 802,616	¥ 378,351
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	7,591	577
Available-for-sale debt securities, Fair value, 12 months or more	180,689	139,214
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	577	474
Available-for-sale debt securities, Fair value, Total	983,305	517,565
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 8,168	¥ 1,051
Available-for-sale debt securities, Number of securities | Securities	231	218
Commercial mortgage-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 71,423	¥ 36,633
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,961	905
Available-for-sale debt securities, Fair value, 12 months or more	5,680	2,616
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	254	7
Available-for-sale debt securities, Fair value, Total	77,103	39,249
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 2,215	¥ 912
Available-for-sale debt securities, Number of securities | Securities	36	21
Asset-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 108,457	¥ 190,795
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	74	394
Available-for-sale debt securities, Fair value, 12 months or more	13,441	49,428
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	105	256
Available-for-sale debt securities, Fair value, Total	121,898	240,223
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 179	¥ 650
Available-for-sale debt securities, Number of securities | Securities	42	89
Other debt securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 27,910	¥ 22,812
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	74	91
Available-for-sale debt securities, Fair value, 12 months or more	18,354	22,388
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	565	639
Available-for-sale debt securities, Fair value, Total	46,264	45,200
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 639	¥ 730
Available-for-sale debt securities, Number of securities | Securities	17	17
Commercial paper
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 424,053	¥ 116,016
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	22	5
Available-for-sale debt securities, Fair value, 12 months or more	0	0
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	0	0
Available-for-sale debt securities, Fair value, Total	424,053	116,016
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 22	¥ 5
Available-for-sale debt securities, Number of securities | Securities	28	8

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, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized during the period	¥ 289,949	¥ 683,303
Equity Securities, FV-NI, Realized Gain (Loss)	(1,913)	17,136
Net unrealized gains recognized during the reporting period still held at the reporting date	¥ 291,862	¥ 666,167

Investment Securities (Carrying

Investment Securities (Carrying Value of Nonmarketable Equity Securities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Nonmarketable equity securities | Measurement Alternative
Investment Securities [Line Items]
Measurement alternative balance	¥ 363,991	¥ 356,074

Investment Securities (Related

Investment Securities (Related Adjustments for Nonmarketable Equity Securities) (Detail) - Nonmarketable equity securities - Measurement Alternative - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Investment Securities [Line Items]
Measurement alternative impairment losses	¥ (2,834)	¥ (2,984)
Measurement alternative downward changes for observable prices	0	0
Measurement alternative upward changes for observable prices	1,075	¥ 3,685
Cumulative impairment losses	12,591		¥ 10,102
Cumulative downward changes for observable prices	953		953
Cumulative upward changes for observable prices	¥ 53,600		¥ 54,806

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses (Loans by Domicile and Industry of Borrower Segment Classification) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Unearned income, unamortized premiums—net and deferred loan fees—net	¥ (301,543)	¥ (308,882)
Total loans, net	106,350,454	115,718,863
Loans held for sale	325,921	353,095
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Loans and Leases Receivable Disclosure [Line Items]
Less: Loans in transferred business of MUFG Union Bank	(6,431,831)	0
Domestic
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	66,450,907	68,326,402
Domestic | Manufacturing
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	12,529,819	13,133,360
Domestic | Construction
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	692,467	763,958
Domestic | Real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	12,014,585	11,997,301
Domestic | Services
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	2,735,763	2,908,975
Domestic | Wholesale and retail
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	7,729,051	7,766,070
Domestic | Banks and other financial institutions
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	5,904,659	6,443,296
Domestic | Communication and information services
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	1,336,456	1,407,738
Domestic | Other industries
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	8,681,345	8,838,718
Domestic | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	14,826,762	15,066,986
Foreign
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	46,632,921	47,701,343
Foreign | Banks and other financial institutions
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	11,703,363	10,649,029
Foreign | Governments and official institutions
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	640,035	655,367
Foreign | Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	27,672,268	29,574,176
Foreign | Other
Loans and Leases Receivable Disclosure [Line Items]
Loans, gross	¥ 6,617,255	¥ 6,822,771

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses (Narrative) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	¥ 1,040,049		¥ 1,162,424
Accrued interest receivable	223,222		259,336
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Significant sales of loans	¥ 850,000	¥ 613,000
Commercial | Minimum
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 | Maximum
Financing Receivable, Allowance for Credit Losses [Line Items]
Temporary extensions of maturity dates to nonaccrual loans, in day	90 days
Card | 1 - 3 months past due
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	¥ 2,279		2,252
Card | Greater than 3 months
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	2,893		2,728
Card | Total past due
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	¥ 5,172		¥ 4,980
Card | Minimum
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
Financing Receivable, Allowance for Credit Losses [Line Items]
Significant sales of loans	¥ 519,000
MUAH | Minimum
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 | Minimum
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
Residential | Minimum
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 | Maximum
Financing Receivable, Allowance for Credit Losses [Line Items]
Temporary extensions of maturity dates to nonaccrual loans, in day	90 days

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses (Nonaccrual Status of Loans by Class) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	¥ 1,171,490	¥ 1,213,841
Nonaccrual loans not requiring an allowance for credit losses	236,709	246,007
Loans held for sale placed on nonaccrual status	14,832	8,562
Loans held for sale placed on nonaccrual status, not requiring allowance	14,832	8,562
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	55,035
Nonaccrual loans not requiring an allowance for credit losses	30,864
Commercial | Domestic
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	541,779	565,671
Nonaccrual loans not requiring an allowance for credit losses	110,425	111,141
Commercial | Foreign
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	246,097	258,391
Nonaccrual loans not requiring an allowance for credit losses	88,415	96,833
Residential
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	61,314	67,968
Nonaccrual loans not requiring an allowance for credit losses	5,144	4,720
Card
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	61,723	60,200
Nonaccrual loans not requiring an allowance for credit losses	0	0
MUAH
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	75,344	73,706
Nonaccrual loans not requiring an allowance for credit losses	30,864	30,242
Krungsri
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	157,215	161,338
Nonaccrual loans not requiring an allowance for credit losses	1,861	3,042
Other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	28,018	26,567
Nonaccrual loans not requiring an allowance for credit losses	¥ 0	¥ 29

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses (Recognized Interest Income on Nonaccrual Loans) (Details) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	¥ 9,989	¥ 11,932
Commercial | Domestic
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	2,004	2,229
Commercial | Foreign
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	2,301	2,061
Residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	422	488
Card
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	13	20
MUAH
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	377	483
Krungsri
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	2,950	3,498
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	¥ 1,922	¥ 3,153

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses (Troubled Debt Restructurings by Class) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	¥ 147,777	¥ 122,897
Troubled debt restructurings, Post-modification outstanding recorded investment	146,173	122,338
Troubled debt restructurings that subsequently defaulted, Recorded Investment	20,884	19,985
Commercial | Domestic
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	94,584	43,717
Troubled debt restructurings, Post-modification outstanding recorded investment	93,578	43,717
Troubled debt restructurings that subsequently defaulted, Recorded Investment	7,048	9,280
Commercial | Foreign
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	529	10,292
Troubled debt restructurings, Post-modification outstanding recorded investment	529	10,292
Troubled debt restructurings that subsequently defaulted, Recorded Investment	8,447	3,940
Residential
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	13,707	27,985
Troubled debt restructurings, Post-modification outstanding recorded investment	13,707	27,985
Troubled debt restructurings that subsequently defaulted, Recorded Investment	117	41
Card
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	11,485	10,694
Troubled debt restructurings, Post-modification outstanding recorded investment	10,877	10,185
Troubled debt restructurings that subsequently defaulted, Recorded Investment	1,269	1,556
MUAH
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	14,233	13,958
Troubled debt restructurings, Post-modification outstanding recorded investment	14,243	13,920
Troubled debt restructurings that subsequently defaulted, Recorded Investment	258	3,113
Krungsri
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	8,135	9,130
Troubled debt restructurings, Post-modification outstanding recorded investment	8,135	9,130
Troubled debt restructurings that subsequently defaulted, Recorded Investment	2,104	1,875
Other
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	5,104	7,121
Troubled debt restructurings, Post-modification outstanding recorded investment	5,104	7,109
Troubled debt restructurings that subsequently defaulted, Recorded Investment	¥ 1,641	¥ 180

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, 2021	Mar. 31, 2021
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	¥ 112,704,276	¥ 115,674,650
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	6,378,200
Commercial
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	18,453,877	29,805,641
2019	14,031,765	10,256,709
2018	8,729,077	9,410,172
2017	7,934,655	5,360,221
2016	4,617,515	4,736,515
Prior	10,141,926	6,945,092
Revolving loans amortized cost basis	19,085,841	19,401,336
Revolving loans converted to term loans amortized cost basis	3,618	9,776
Total	82,998,274	85,925,462
Commercial | Domestic
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	13,682,280	22,402,694
2019	9,706,901	6,392,946
2018	5,701,452	6,126,746
2017	5,531,710	3,840,964
2016	3,431,971	3,649,145
Prior	8,069,620	5,286,408
Revolving loans amortized cost basis	6,836,453	6,934,308
Revolving loans converted to term loans amortized cost basis	0	0
Total	52,960,387	54,633,211
Commercial | Domestic | Normal
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	13,476,976	21,936,776
2019	9,379,217	6,058,126
2018	5,374,910	5,915,318
2017	5,347,194	3,666,734
2016	3,288,990	3,551,332
Prior	7,592,772	4,847,597
Revolving loans amortized cost basis	6,511,649	6,604,586
Revolving loans converted to term loans amortized cost basis	0	0
Total	50,971,708	52,580,469
Commercial | Domestic | Close Watch
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	187,910	431,223
2019	303,221	319,073
2018	311,227	195,630
2017	172,855	162,176
2016	128,990	74,698
Prior	348,587	317,622
Revolving loans amortized cost basis	302,139	306,236
Revolving loans converted to term loans amortized cost basis	0	0
Total	1,754,929	1,806,658
Commercial | Domestic | Likely to become Bankrupt or Legally/Virtually Bankrupt
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	17,394	34,695
2019	24,463	15,747
2018	15,315	15,798
2017	11,661	12,054
2016	13,991	23,115
Prior	128,261	121,189
Revolving loans amortized cost basis	22,665	23,486
Revolving loans converted to term loans amortized cost basis	0	0
Total	233,750	246,084
Commercial | Foreign
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	4,771,597	7,402,947
2019	4,324,864	3,863,763
2018	3,027,625	3,283,426
2017	2,402,945	1,519,257
2016	1,185,544	1,087,370
Prior	2,072,306	1,658,684
Revolving loans amortized cost basis	12,249,388	12,467,028
Revolving loans converted to term loans amortized cost basis	3,618	9,776
Total	30,037,887	31,292,251
Commercial | Foreign | Normal
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	4,629,791	7,158,793
2019	4,176,598	3,704,240
2018	2,943,456	3,155,261
2017	2,301,257	1,423,064
2016	1,102,141	1,032,052
Prior	1,948,945	1,534,943
Revolving loans amortized cost basis	12,074,150	12,231,018
Revolving loans converted to term loans amortized cost basis	3,618	9,776
Total	29,179,956	30,249,147
Commercial | Foreign | Close Watch
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	109,375	200,305
2019	104,006	118,027
2018	68,176	91,867
2017	72,739	60,422
2016	48,437	51,433
Prior	72,635	69,436
Revolving loans amortized cost basis	140,307	197,405
Revolving loans converted to term loans amortized cost basis	0	0
Total	615,675	788,895
Commercial | Foreign | Likely to become Bankrupt or Legally/Virtually Bankrupt
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	32,431	43,849
2019	44,260	41,496
2018	15,993	36,298
2017	28,949	35,771
2016	34,966	3,885
Prior	50,726	54,305
Revolving loans amortized cost basis	34,931	38,605
Revolving loans converted to term loans amortized cost basis	0	0
Total	242,256	254,209
Residential
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	341,196	623,328
2019	607,300	847,314
2018	825,437	822,883
2017	798,135	892,166
2016	862,156	1,304,110
Prior	9,504,401	8,660,022
Revolving loans amortized cost basis	30,350	32,984
Revolving loans converted to term loans amortized cost basis	8	8
Total	12,968,983	13,182,815
Residential | Accrual
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	341,125	623,035
2019	607,036	846,787
2018	824,939	822,411
2017	797,610	891,407
2016	861,322	1,302,427
Prior	9,448,841	8,599,621
Revolving loans amortized cost basis	28,306	30,897
Revolving loans converted to term loans amortized cost basis	0	0
Total	12,909,179	13,116,585
Residential | Nonaccrual
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	71	293
2019	264	527
2018	498	472
2017	525	759
2016	834	1,683
Prior	55,560	60,401
Revolving loans amortized cost basis	2,044	2,087
Revolving loans converted to term loans amortized cost basis	8	8
Total	59,804	66,230
Card
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	1	14
2019	75	96
2018	149	171
2017	188	304
2016	299	110
Prior	520	513
Revolving loans amortized cost basis	404,682	417,804
Revolving loans converted to term loans amortized cost basis	62,406	60,284
Total	468,320	479,296
Card | Accrual
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	0	1
2019	4	10
2018	10	13
2017	11	19
2016	16	7
Prior	55	79
Revolving loans amortized cost basis	391,619	404,301
Revolving loans converted to term loans amortized cost basis	14,882	14,666
Total	406,597	419,096
Card | Nonaccrual
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	1	13
2019	71	86
2018	139	158
2017	177	285
2016	283	103
Prior	465	434
Revolving loans amortized cost basis	13,063	13,503
Revolving loans converted to term loans amortized cost basis	47,524	45,618
Total	61,723	60,200
MUAH
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	957,613	1,406,996
2019	1,218,450	1,366,930
2018	1,192,906	915,570
2017	795,520	861,742
2016	715,342	770,568
Prior	1,761,857	1,291,561
Revolving loans amortized cost basis	2,060,216	1,882,377
Revolving loans converted to term loans amortized cost basis	0	0
Total	8,701,904	8,495,744
MUAH | Accrual | Credit Quality Based on the Number of Delinquencies
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	521,772	472,892
2019	439,777	608,580
2018	437,123	324,369
2017	225,583	552,380
2016	410,915	516,051
Prior	942,916	656,087
Revolving loans amortized cost basis	120,864	130,514
Revolving loans converted to term loans amortized cost basis	0	0
Total	3,098,950	3,260,873
MUAH | Nonaccrual | Credit Quality Based on the Number of Delinquencies
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	0	0
2019	0	725
2018	332	518
2017	332	1,139
2016	995	1,035
Prior	14,265	14,801
Revolving loans amortized cost basis	663	828
Revolving loans converted to term loans amortized cost basis	0	0
Total	16,587	19,046
MUAH | Pass | Credit Quality Based on Internal Credit Ratings
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	428,211	920,959
2019	758,437	707,841
2018	707,238	486,354
2017	483,020	287,316
2016	286,292	236,715
Prior	736,337	542,634
Revolving loans amortized cost basis	1,853,100	1,625,799
Revolving loans converted to term loans amortized cost basis	0	0
Total	5,252,635	4,807,618
MUAH | Special Mention | Credit Quality Based on Internal Credit Ratings
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	442	4,865
2019	5,087	31,361
2018	31,847	49,784
2017	25,655	14,904
2016	14,597	9,522
Prior	13,491	30,015
Revolving loans amortized cost basis	58,829	76,487
Revolving loans converted to term loans amortized cost basis	0	0
Total	149,948	216,938
MUAH | Classified | Credit Quality Based on Internal Credit Ratings
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	7,188	8,280
2019	15,149	18,423
2018	16,366	54,545
2017	60,930	6,003
2016	2,543	7,245
Prior	54,848	48,024
Revolving loans amortized cost basis	26,760	48,749
Revolving loans converted to term loans amortized cost basis	0	0
Total	183,784	191,269
Krungsri
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	640,591	1,316,031
2019	1,115,181	1,197,815
2018	1,041,784	958,241
2017	834,107	506,919
2016	398,161	285,427
Prior	572,795	402,752
Revolving loans amortized cost basis	1,950,932	1,922,946
Revolving loans converted to term loans amortized cost basis	15,320	14,514
Total	6,568,871	6,604,645
Krungsri | Performing
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	616,680	1,251,246
2019	1,034,730	1,086,710
2018	918,713	855,915
2017	724,790	434,818
2016	328,519	241,811
Prior	443,815	314,114
Revolving loans amortized cost basis	1,780,963	1,754,840
Revolving loans converted to term loans amortized cost basis	0	0
Total	5,848,210	5,939,454
Krungsri | Under-Performing
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	20,246	52,821
2019	64,569	85,408
2018	97,874	74,848
2017	84,307	57,314
2016	56,641	31,886
Prior	90,904	57,129
Revolving loans amortized cost basis	148,905	144,447
Revolving loans converted to term loans amortized cost basis	0	0
Total	563,446	503,853
Krungsri | Non-Performing
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	3,665	11,964
2019	15,882	25,697
2018	25,197	27,478
2017	25,010	14,787
2016	13,001	11,730
Prior	38,076	31,509
Revolving loans amortized cost basis	21,064	23,659
Revolving loans converted to term loans amortized cost basis	15,320	14,514
Total	157,215	161,338
Other
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	248,301	338,342
2019	191,687	164,650
2018	121,279	84,115
2017	58,672	37,394
2016	28,283	11,030
Prior	19,768	8,538
Revolving loans amortized cost basis	329,934	342,619
Revolving loans converted to term loans amortized cost basis	0	0
Total	997,924	986,688
Other | Accrual
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	248,155	335,830
2019	181,373	159,363
2018	118,153	79,608
2017	56,396	35,366
2016	27,053	10,556
Prior	18,866	8,201
Revolving loans amortized cost basis	319,911	331,197
Revolving loans converted to term loans amortized cost basis	0	0
Total	969,907	960,121
Other | Nonaccrual
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
2020	146	2,512
2019	10,314	5,287
2018	3,126	4,507
2017	2,276	2,028
2016	1,230	474
Prior	902	337
Revolving loans amortized cost basis	10,023	11,422
Revolving loans converted to term loans amortized cost basis	0	0
Total	¥ 28,017	¥ 26,567

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, 2021	Mar. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	¥ 12,057	¥ 20,540
Financing Receivable, before Allowance for Credit Loss	112,704,276	115,674,650
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	6,378,200
1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	258,157	249,200
Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	233,409	281,701
Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	491,566	530,901
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	112,212,710	115,143,749
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	82,998,274	85,925,462
Commercial | Domestic
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	3,956	4,673
Financing Receivable, before Allowance for Credit Loss	52,960,387	54,633,211
Commercial | Domestic | 1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	8,314	4,763
Commercial | Domestic | Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	10,101	22,996
Commercial | Domestic | Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	18,415	27,759
Commercial | Domestic | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	52,941,972	54,605,452
Commercial | Foreign
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	0	91
Financing Receivable, before Allowance for Credit Loss	30,037,887	31,292,251
Commercial | Foreign | 1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	9,966	7,302
Commercial | Foreign | Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	15,288	22,473
Commercial | Foreign | Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	25,254	29,775
Commercial | Foreign | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	30,012,633	31,262,476
Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	4,899	11,150
Financing Receivable, before Allowance for Credit Loss	12,968,983	13,182,815
Residential | 1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	36,733	39,577
Residential | Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	17,456	28,375
Residential | Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	54,189	67,952
Residential | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	12,914,794	13,114,863
Card
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	0	0
Financing Receivable, before Allowance for Credit Loss	468,320	479,296
Card | 1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,330	2,127
Card | Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	27,037	26,786
Card | Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	29,367	28,913
Card | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	438,953	450,383
MUAH
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	3,202	4,626
Financing Receivable, before Allowance for Credit Loss	8,701,904	8,495,744
MUAH | 1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	46,954	42,082
MUAH | Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	19,925	29,337
MUAH | Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	66,879	71,419
MUAH | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	8,635,025	8,424,325
Krungsri
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	0	0
Financing Receivable, before Allowance for Credit Loss	6,568,871	6,604,645
Krungsri | 1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	130,628	131,573
Krungsri | Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	121,735	127,533
Krungsri | Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	252,363	259,106
Krungsri | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	6,316,508	6,345,539
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 days and accruing	0	0
Financing Receivable, before Allowance for Credit Loss	997,924	986,688
Other | 1 - 3 months past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	23,232	21,776
Other | Greater than 3 months
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	21,867	24,201
Other | Total past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	45,099	45,977
Other | Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	¥ 952,825	¥ 940,711

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, 2021	Sep. 30, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	¥ 1,348,391	¥ 809,540
Charge-offs	132,040	135,190
Recoveries collected	27,730	19,537
Net charge-offs	104,310	115,653
Other	10,313	(18,862)
Balance at end of period	1,171,458	1,208,535
Provision for Other Credit Losses	(10,838)	209,806
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	(72,098)
Effect of adopting new guidance on measurement of credit losses on financial instruments | Measurement of Credit Losses on Financial Instruments
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		323,704
Commercial
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	734,577	482,275
Charge-offs	36,033	34,833
Recoveries collected	6,360	3,362
Net charge-offs	29,673	31,471
Other	(17)	(3,968)
Balance at end of period	668,472	567,818
Provision for Other Credit Losses	(36,415)	37,154
Commercial | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	0
Commercial | Effect of adopting new guidance on measurement of credit losses on financial instruments | Measurement of Credit Losses on Financial Instruments
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		83,828
Residential
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	82,893	34,746
Charge-offs	1,399	997
Recoveries collected	10	7
Net charge-offs	1,389	990
Other	0	0
Balance at end of period	74,561	82,303
Provision for Other Credit Losses	(6,943)	(947)
Residential | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	0
Residential | Effect of adopting new guidance on measurement of credit losses on financial instruments | Measurement of Credit Losses on Financial Instruments
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		49,494
Card
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	44,217	35,180
Charge-offs	8,704	11,230
Recoveries collected	691	486
Net charge-offs	8,013	10,744
Other	0	0
Balance at end of period	43,799	47,520
Provision for Other Credit Losses	7,595	8,822
Card | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	0
Card | Effect of adopting new guidance on measurement of credit losses on financial instruments | Measurement of Credit Losses on Financial Instruments
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		14,262
MUAH
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	131,755	58,995
Charge-offs	9,459	17,453
Recoveries collected	3,335	1,749
Net charge-offs	6,124	15,704
Other	7,815	(1,757)
Balance at end of period	22,780	156,383
Provision for Other Credit Losses	(38,568)	89,812
MUAH | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	(72,098)
MUAH | Effect of adopting new guidance on measurement of credit losses on financial instruments | Measurement of Credit Losses on Financial Instruments
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		25,037
Krungsri
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	293,396	169,626
Charge-offs	46,405	44,882
Recoveries collected	11,741	11,405
Net charge-offs	34,664	33,477
Other	(141)	(10,860)
Balance at end of period	301,427	291,151
Provision for Other Credit Losses	42,836	47,529
Krungsri | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	0
Krungsri | Effect of adopting new guidance on measurement of credit losses on financial instruments | Measurement of Credit Losses on Financial Instruments
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		118,333
Other
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	61,553	28,718
Charge-offs	30,040	25,795
Recoveries collected	5,593	2,528
Net charge-offs	24,447	23,267
Other	2,656	(2,277)
Balance at end of period	60,419	63,360
Provision for Other Credit Losses	20,657	27,436
Other | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	¥ 0
Other | Effect of adopting new guidance on measurement of credit losses on financial instruments | Measurement of Credit Losses on Financial Instruments
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		¥ 32,750

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Movement in Carrying Amount of Goodwill) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Goodwill [Roll Forward]
Goodwill, at beginning of period	¥ 1,094,344	¥ 1,093,554
Accumulated impairment losses, at beginning of period	(723,492)	(575,928)
Goodwill, Net at beginning of period	370,852	517,626
Goodwill acquired during the six months	0	3,990
Impairment loss	0	(106,479)
Foreign currency translation adjustments and other	19,329	(10,128)
Goodwill, at end of period	1,113,673	1,087,416
Accumulated impairment losses, at end of period	(723,492)	(682,407)
Goodwill, Net at end of period	300,058	405,009
Goodwill, fully impaired before April 1, 2019	1,900,019
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Goodwill [Roll Forward]
Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank	¥ 90,123	¥ 0

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Narrative) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment losses on goodwill	¥ 0	¥ 106,479

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, 2021	Mar. 31, 2021
Intangible assets subject to amortization:
Finite-Lived Intangible Assets, Net	¥ 1,166,972	¥ 1,164,894
Intangible assets not subject to amortization:
Indefinite-lived Intangible Assets	20,571	20,100
Total	1,149,539	1,184,994
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Intangible assets not subject to amortization:
Less: Intangible assets in transferred business of MUFG Union Bank	38,004	0
Mortgage servicing rights
Intangible assets not subject to amortization:
Indefinite-lived Intangible Assets	12,053	11,355
Software
Intangible assets subject to amortization:
Finite-Lived Intangible Assets, Net	788,935	776,429
Customer relationships
Intangible assets subject to amortization:
Finite-Lived Intangible Assets, Net	258,860	265,155
Core deposit intangibles
Intangible assets subject to amortization:
Finite-Lived Intangible Assets, Net	59,393	62,021
Trade names
Intangible assets subject to amortization:
Finite-Lived Intangible Assets, Net	49,388	50,793
Other
Intangible assets subject to amortization:
Finite-Lived Intangible Assets, Net	¥ 10,396	¥ 10,496

Lease Transactions (Detail)

Lease Transactions (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Sales type and direct financing leases:
Finance income on net investment	¥ 59,369	¥ 64,748
Operating leases:
Lease income	1,843	2,025
Total	¥ 61,212	¥ 66,773

Pledged Assets and Collateral_2

Pledged Assets and Collateral (Assets Mortgaged, Pledged, or Otherwise Subject to Lien) (Detail) ¥ in Millions	Sep. 30, 2021JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 43,407,141
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	860,646
Trading account securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	12,101,156
Investment securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	18,996,743
Loans
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	12,287,113
Other
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 22,129

Pledged Assets and Collateral_3

Pledged Assets and Collateral (Pledged Assets Classified by Type of Liabilities) (Detail) ¥ in Millions	Sep. 30, 2021JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 43,407,141
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	860,646
Deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	244,149
Payables under repurchase agreements and securities lending transactions
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	14,867,093
Other short term borrowings and long term debt
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	28,266,550
Other
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 29,349

Pledged Assets and Collateral_4

Pledged Assets and Collateral (Narrative) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]
Investment securities pledged for acting as a collection agent of public funds	¥ 21,272,299
Cash collateral pledged for derivative transactions included in Other assets	1,586,822	¥ 2,005,136
Cash collateral received for derivative transactions included in Other liabilities	882,610	¥ 909,641
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Financial Instruments Owned and Pledged as Collateral [Line Items]
Cash collateral pledged for derivative transactions included in Other assets	¥ 29,362

Severance Indemnities and Pen_3

Severance Indemnities and Pension Plans (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Foreign offices and subsidiaries | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	¥ 9,276	¥ 7,354
Interest cost on projected benefit obligation	5,575	7,255
Expected return on plan assets	(16,254)	(15,785)
Amortization of net actuarial loss	3,215	8,158
Amortization of prior service cost	(1,343)	(1,309)
Gain on settlements and curtailment	0	0
Net periodic benefit cost (income)	469	5,673
Foreign offices and subsidiaries | Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	100	117
Interest cost on projected benefit obligation	264	402
Expected return on plan assets	(1,182)	(1,072)
Amortization of net actuarial loss	73	125
Amortization of prior service cost	(189)	(226)
Gain on settlements and curtailment	0	0
Net periodic benefit cost (income)	(934)	(654)
Domestic subsidiaries | Pension Benefits and SIPs
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	22,196	23,695
Interest cost on projected benefit obligation	6,081	5,596
Expected return on plan assets	(41,132)	(35,577)
Amortization of net actuarial loss	137	8,547
Amortization of prior service cost	(629)	(602)
Gain on settlements and curtailment	(2,632)	(1,084)
Net periodic benefit cost (income)	¥ (15,979)	¥ 575

Offsetting of Derivatives, Re_3

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions (Detail) - JPY (¥)	Sep. 30, 2021	Mar. 31, 2021
Offsetting Derivative Assets [Abstract]
Derivative assets, Gross amounts of recognized assets/liabilities	¥ 9,932,000,000,000	¥ 11,997,000,000,000
Derivative assets, Gross amounts offset in the condensed consolidated balance sheet	0	0
Derivative assets, Net amounts presented in the condensed consolidated balance sheet	9,932,000,000,000	11,997,000,000,000
Derivative assets, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(7,041,000,000,000)	(8,628,000,000,000)
Derivative assets, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(564,000,000,000)	(605,000,000,000)
Derivative assets, Net amounts	2,327,000,000,000	2,764,000,000,000
Offsetting Securities Purchased under Agreements to Resell [Abstract]
Receivables under resale agreements, Gross amounts of recognized assets/liabilities	14,333,000,000,000	16,053,000,000,000
Receivables under resale agreements, Gross amounts offset in the condensed consolidated balance sheet	(2,262,000,000,000)	(2,273,000,000,000)
Receivables under resale agreements, Net amounts presented in the condensed consolidated balance sheet	12,071,000,000,000	13,780,000,000,000
Receivables under resale agreements, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(11,418,000,000,000)	(12,687,000,000,000)
Receivables under resale agreements, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(24,000,000,000)	(37,000,000,000)
Receivables under resale agreements, Net amounts	629,000,000,000	1,056,000,000,000
Offsetting Securities Borrowed [Abstract]
Receivables under securities borrowing transactions, Gross amounts of recognized assets/liabilities	3,542,000,000,000	3,370,000,000,000
Receivables under securities borrowing transactions, Gross amounts offset in the condensed consolidated balance sheet	(76,000,000,000)	0
Receivables under securities borrowing transactions, Net amounts presented in the condensed consolidated balance sheet	3,466,015,000,000	3,369,903,000,000
Receivables under securities borrowing transactions, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(3,392,000,000,000)	(3,289,000,000,000)
Receivables under securities borrowing transactions, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	0	0
Receivables under securities borrowing transactions, Net amounts	74,000,000,000	81,000,000,000
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Financial assets, Gross amounts of recognized assets/liabilities, Total	27,807,000,000,000	31,420,000,000,000
Financial assets, Gross amounts offset in the condensed consolidated balance sheet, Total	(2,338,000,000,000)	(2,273,000,000,000)
Financial assets, Net amounts presented in the condensed consolidated balance sheet, Total	25,469,000,000,000	29,147,000,000,000
Financial assets, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments, Total	(21,851,000,000,000)	(24,604,000,000,000)
Financial assets, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged, Total	(588,000,000,000)	(642,000,000,000)
Financial assets, Net amounts, Total	3,030,000,000,000	3,901,000,000,000
Offsetting Derivative Liabilities [Abstract]
Derivative liabilities, Gross amounts of recognized assets/liabilities	9,426,000,000,000	11,714,000,000,000
Derivative liabilities, Gross amounts offset in the condensed consolidated balance sheet	0	0
Derivative liabilities, Net amounts presented in the condensed consolidated balance sheet	9,426,000,000,000	11,714,000,000,000
Derivative liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(6,999,000,000,000)	(8,545,000,000,000)
Derivative liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(1,207,000,000,000)	(1,624,000,000,000)
Derivative liabilities, Net amounts	1,220,000,000,000	1,545,000,000,000
Offsetting Securities Sold under Agreements to Repurchase [Abstract]
Payables under repurchase agreements, Gross amounts of recognized assets/liabilities	27,720,000,000,000	26,800,000,000,000
Payables under repurchase agreements, Gross amounts offset in the condensed consolidated balance sheet	(2,231,000,000,000)	(2,232,000,000,000)
Payables under repurchase agreements, Net amounts presented in the condensed consolidated balance sheet	25,489,000,000,000	24,568,000,000,000
Payables under repurchase agreements, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(24,685,000,000,000)	(23,835,000,000,000)
Payables under repurchase agreements, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(101,000,000,000)	(60,000,000,000)
Payables under repurchase agreements, Net amounts	703,000,000,000	673,000,000,000
Offsetting Securities Loaned [Abstract]
Payables under securities lending transactions, Gross amounts of recognized assets/liabilities	910,000,000,000	843,000,000,000
Payables under securities lending transactions, Gross amounts offset in the condensed consolidated balance sheet	(76,000,000,000)	0
Payables under securities lending transactions, Net amounts presented in the condensed consolidated balance sheet	833,696,000,000	842,590,000,000
Payables under securities lending transactions, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(813,000,000,000)	(814,000,000,000)
Payables under securities lending transactions, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	0	(2,000,000,000)
Payables under securities lending transactions, Net amounts	21,000,000,000	27,000,000,000
Offsetting Obligations To Return Securities Received As Collateral [Abstract]
Obligations to return securities received as collateral, Gross amounts of recognized assets/liabilities	5,975,000,000,000	6,582,000,000,000
Obligations to return securities received as collateral, Gross amounts offset in the condensed consolidated balance sheet	0	0
Obligations to return securities received as collateral, Net amounts presented in the condensed consolidated balance sheet	5,975,000,000,000	6,582,000,000,000
Obligations to return securities received as collateral, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(1,494,000,000,000)	(1,931,000,000,000)
Obligations to return securities received as collateral, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	0	0
Obligations to return securities received as collateral, Net amounts	4,481,000,000,000	4,651,000,000,000
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
Financial liabilities, Gross amounts of recognized assets/liabilities, Total	44,031,000,000,000	45,939,000,000,000
Financial liabilities, Gross amounts offset in the condensed consolidated balance sheet, Total	(2,307,000,000,000)	(2,232,000,000,000)
Financial liabilities, Net amounts presented in the condensed consolidated balance sheet, Total	41,724,000,000,000	43,707,000,000,000
Financial liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments, Total	(33,991,000,000,000)	(35,125,000,000,000)
Financial liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged, Total	(1,308,000,000,000)	(1,686,000,000,000)
Financial liabilities, Net amounts, Total	6,425,000,000,000	¥ 6,896,000,000,000
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Offsetting Derivative Assets [Abstract]
Derivative assets, Net amounts presented in the condensed consolidated balance sheet	87,000,000,000
Offsetting Derivative Liabilities [Abstract]
Derivative liabilities, Net amounts presented in the condensed consolidated balance sheet	¥ 17,000,000,000

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, 2021	Mar. 31, 2021
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 27,720	¥ 26,800
Payables under securities lending transactions	910	843
Obligations to return securities received as collateral	5,975	6,582
Total	34,605	34,225
Overnight and open
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	11,260	6,006
Payables under securities lending transactions	779	789
Obligations to return securities received as collateral	5,485	5,607
Total	17,524	12,402
30 days or less
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	12,161	16,888
Payables under securities lending transactions	0	26
Obligations to return securities received as collateral	195	278
Total	12,356	17,192
31-90 days
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	2,444	1,973
Payables under securities lending transactions	64	28
Obligations to return securities received as collateral	143	528
Total	2,651	2,529
Over 90 days
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	1,855	1,933
Payables under securities lending transactions	67	0
Obligations to return securities received as collateral	152	169
Total	¥ 2,074	¥ 2,102

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, 2021	Mar. 31, 2021
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 27,720	¥ 26,800
Payables under securities lending transactions	910	843
Obligations to return securities received as collateral	5,975	6,582
Total	34,605	34,225
Japanese national government and Japanese government agency bonds
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	7,362	7,754
Payables under securities lending transactions	44	104
Obligations to return securities received as collateral	3,384	4,022
Total	10,790	11,880
Foreign government and official institution bonds
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	14,171	13,914
Payables under securities lending transactions	17	17
Obligations to return securities received as collateral	794	738
Total	14,982	14,669
Corporate bonds
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	712	702
Payables under securities lending transactions	67	1
Obligations to return securities received as collateral	260	214
Total	1,039	917
Residential mortgage-backed securities
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	4,747	3,729
Payables under securities lending transactions	0	0
Obligations to return securities received as collateral	0	0
Total	4,747	3,729
Other debt securities
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	245	218
Payables under securities lending transactions	0	0
Obligations to return securities received as collateral	1	5
Total	246	223
Marketable equity securities
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	444	462
Payables under securities lending transactions	776	721
Obligations to return securities received as collateral	1,527	1,603
Total	2,747	2,786
Other
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	39	21
Payables under securities lending transactions	6	0
Obligations to return securities received as collateral	9	0
Total	¥ 54	¥ 21

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, 2021	Sep. 30, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	¥ 16,244,554
Net change during the period	227,194	¥ (128,009)
Balance at end of period	17,100,819	15,824,539
Accumulated other comprehensive income(loss), net of taxes:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(289,481)	(420,417)
Net change during the period	207,990	(123,717)
Balance at end of period	(81,491)	(544,100)
Accumulated other comprehensive income(loss), net of taxes: | Revision of Prior Period, Accounting Standards Update, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at end of period	0	34
Net unrealized losses (gains) on investment securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(383,004)	(344,785)
Net change during the period	(28,028)	54,116
Balance at end of period	(411,032)	(290,635)
Net unrealized losses (gains) on investment securities | Revision of Prior Period, Accounting Standards Update, Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at end of period		34
Net debt valuation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(37,862)	45,502
Net change during the period	5,965	(59,324)
Balance at end of period	(31,897)	(13,822)
Net unrealized losses (gains) on derivatives qualifying for cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	19,029	(13,343)
Net change during the period	(5,750)	38,130
Balance at end of period	13,279	24,787
Defined benefit plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(20,382)	(337,918)
Net change during the period	(9,681)	27,625
Balance at end of period	(30,063)	(310,293)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	132,738	230,127
Net change during the period	245,484	(184,264)
Balance at end of period	¥ 378,222	¥ 45,863

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, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	¥ 227,194	¥ (128,009)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	207,990	(123,717)
Net unrealized gains (losses) on investment securities:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	19,768	83,444
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	3,871	21,968
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	15,897	61,476
Reclassification adjustment, Current Period, before Tax	43,792	1,055
Reclassification adjustment, Current Period, Tax (expense) or benefit	13,390	(238)
Reclassification adjustment, Current Period, Net of Tax	30,402	1,293
Other Comprehensive Income (Loss), before Tax	(24,024)	82,389
Other Comprehensive Income (Loss), Tax (expense) or benefit	(9,519)	22,206
Other Comprehensive Income (Loss), Net of Tax, Total	(14,505)	60,183
Net unrealized gains on investment securities attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	13,523	6,067
Net unrealized gains (losses) on investment securities attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	(28,028)	54,116
Net debt valuation adjustments:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	8,270	(85,613)
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	2,533	(26,214)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	5,737	(59,399)
Reclassification adjustment, Current Period, before Tax	(329)	(108)
Reclassification adjustment, Current Period, Tax (expense) or benefit	(101)	(33)
Reclassification adjustment, Current Period, Net of Tax	(228)	(75)
Other Comprehensive Income (Loss), before Tax	8,599	(85,505)
Other Comprehensive Income (Loss), Tax (expense) or benefit	2,634	(26,181)
Other Comprehensive Income (Loss), Net of Tax, Total	5,965	(59,324)
Net debt valuation adjustments attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	0	0
Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	5,965	(59,324)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(1,034)	51,002
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	(515)	14,013
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(519)	36,989
Reclassification adjustment, Current Period, before Tax	6,748	(1,388)
Reclassification adjustment, Current Period, Tax (expense) or benefit	1,691	(371)
Reclassification adjustment, Current Period, Net of Tax	5,057	(1,017)
Other Comprehensive Income (Loss), before Tax	(7,782)	52,390
Other Comprehensive Income (Loss), Tax (expense) or benefit	(2,206)	14,384
Other Comprehensive Income (Loss), Net of Tax, Total	(5,576)	38,006
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	174	(124)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	(5,750)	38,130
Defined benefit plans:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(12,034)	26,092
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	(3,385)	8,070
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(8,649)	18,022
Reclassification adjustment, Current Period, before Tax	1,442	(13,617)
Reclassification adjustment, Current Period, Tax (expense) or benefit	798	(3,871)
Reclassification adjustment, Current Period, Net of Tax	644	(9,746)
Other Comprehensive Income (Loss), before Tax	(13,476)	39,709
Other Comprehensive Income (Loss), Tax (expense) or benefit	(4,183)	11,941
Other Comprehensive Income (Loss), Net of Tax, Total	(9,293)	27,768
Defined benefit plans attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	388	143
Defined benefit plans attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	(9,681)	27,625
Foreign currency translation adjustments:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	262,860	(214,725)
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	13,271	(19,531)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	249,589	(195,194)
Reclassification adjustment, Current Period, before Tax	(1,462)	(797)
Reclassification adjustment, Current Period, Tax (expense) or benefit	(448)	(245)
Reclassification adjustment, Current Period, Net of Tax	(1,014)	(552)
Other Comprehensive Income (Loss), before Tax	264,322	(213,928)
Other Comprehensive Income (Loss), Tax (expense) or benefit	13,719	(19,286)
Other Comprehensive Income (Loss), Net of Tax, Total	250,603	(194,642)
Foreign currency translation adjustments attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	5,119	(10,378)
Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Total	¥ 245,484	¥ (184,264)

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, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains—net	¥ (335,333)	¥ (683,661)
Equity in earnings of equity method investees—net	(216,085)	(140,420)
Interest income on Loans, including fees	(851,515)	(1,034,727)
Other non-interest income	(93,305)	(19,658)
Other non-interest expenses	(122,844)	(177,457)
Income before income tax expense	1,050,529	1,146,114
Income tax expense	293,696	366,109
Net income before attribution of noncontrolling interests	756,833	780,005
Amount reclassified out of Accumulated OCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income tax expense	50,191	(14,855)
Income tax expense	15,330	(4,758)
Net income before attribution of noncontrolling interests	34,861	(10,097)
Amount reclassified out of Accumulated OCI | Net gains on sales and redemptions of Available-for-sale debt securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains—net	(43,692)	(1,005)
Amount reclassified out of Accumulated OCI | Net unrealized losses (gains) on investment securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains—net	(100)	(50)
Income before income tax expense	43,792	1,055
Income tax expense	13,390	(238)
Net income before attribution of noncontrolling interests	30,402	1,293
Amount reclassified out of Accumulated OCI | Net debt valuation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Equity in earnings of equity method investees—net	329	108
Income before income tax expense	(329)	(108)
Income tax expense	(101)	(33)
Net income before attribution of noncontrolling interests	(228)	(75)
Amount reclassified out of Accumulated OCI | Net unrealized losses (gains) on derivatives qualifying for cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income tax expense	6,748	(1,388)
Income tax expense	1,691	(371)
Net income before attribution of noncontrolling interests	5,057	(1,017)
Amount reclassified out of Accumulated OCI | Net unrealized losses (gains) on derivatives qualifying for cash flow hedges | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on Loans, including fees	(5,589)	1,236
Amount reclassified out of Accumulated OCI | Net unrealized losses (gains) on derivatives qualifying for cash flow hedges | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense on Long-term debt or Foreign exchange losses (gains)—net	(1,159)	152
Amount reclassified out of Accumulated OCI | Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	3,425	16,830
Amount reclassified out of Accumulated OCI | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	(2,161)	(2,137)
Amount reclassified out of Accumulated OCI | Gain on settlements and curtailment, and other
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	(2,706)	(1,076)
Amount reclassified out of Accumulated OCI | Defined benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income tax expense	1,442	(13,617)
Income tax expense	798	(3,871)
Net income before attribution of noncontrolling interests	644	(9,746)
Amount reclassified out of Accumulated OCI | Foreign currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest income	1,462	715
Other non-interest expenses	0	82
Income before income tax expense	(1,462)	(797)
Income tax expense	(448)	(245)
Net income before attribution of noncontrolling interests	¥ (1,014)	¥ (552)

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Detail) - JPY (¥) ¥ in Billions	6 Months Ended		12 Months Ended
	Sep. 30, 2021	Jun. 30, 2020	Mar. 31, 2021	Jun. 30, 2021
Cash Flow Hedge:
Notional amounts of derivatives	¥ 1,494,300		¥ 1,551,800
Credit Derivatives:
Credit derivative, purchased credit protection	70		66
Credit derivative, purchased credit protection, notional value	3,751		4,097
Credit Risk, Liquidity Risk and Credit-risk-related Contingent Features:
Derivative, net liability position, aggregate fair value	600		700
Collateral already posted, aggregate fair value	145		227
Additional collateral, aggregate fair value	56		63
Assets needed for immediate settlement, aggregate fair value	76		92
Interest rate contracts
Cash Flow Hedge:
Notional amounts of derivatives	¥ 1,254,200		¥ 1,308,400
MUAH
Cash Flow Hedge:
Cash flow hedge gain (loss) to be reclassified within twelve months		¥ 11.4
MUAH | Cash Flow Hedging | Weighted Average
Cash Flow Hedge:
Remaining life of the active cash flow hedges, in years		2 years 4 months 24 days
MUAH | Cash Flow Hedging | Interest rate contracts | Interest rates from variable rate loans
Cash Flow Hedge:
Notional amounts of derivatives				¥ 1,105.8

Derivative Financial Instrume_4

Derivative Financial Instruments (Notional Amounts of Derivative Contracts) (Detail) - JPY (¥) ¥ in Trillions	Sep. 30, 2021	Mar. 31, 2021
Derivative [Line Items]
Notional amounts of derivatives	¥ 1,494.3	¥ 1,551.8
Interest rate contracts
Derivative [Line Items]
Notional amounts of derivatives	1,254.2	1,308.4
Foreign exchange contracts
Derivative [Line Items]
Notional amounts of derivatives	219.8	222
Equity contracts
Derivative [Line Items]
Notional amounts of derivatives	7.7	8
Commodity contracts
Derivative [Line Items]
Notional amounts of derivatives	0.1	0.1
Credit derivatives
Derivative [Line Items]
Notional amounts of derivatives	9.1	9.8
Other—net
Derivative [Line Items]
Notional amounts of derivatives	¥ 3.4	¥ 3.5

Derivative Financial Instrume_5

Derivative Financial Instruments (Fair Value Information on Derivative Instruments Recorded on Condensed Consolidated Balance Sheets) (Detail) - JPY (¥)	Sep. 30, 2021	Mar. 31, 2021
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	¥ 9,932,000,000,000	¥ 11,997,000,000,000
Fair value of derivative liabilities	9,426,000,000,000	11,714,000,000,000
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	87,000,000,000
Fair value of derivative liabilities	17,000,000,000
Interest rate contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	6,430,000,000,000	7,718,000,000,000
Fair value of derivative liabilities	6,138,000,000,000	7,361,000,000,000
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	3,154,000,000,000	3,910,000,000,000
Fair value of derivative liabilities	2,950,000,000,000	4,027,000,000,000
Equity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	216,000,000,000	231,000,000,000
Fair value of derivative liabilities	238,000,000,000	237,000,000,000
Commodity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	24,000,000,000	27,000,000,000
Fair value of derivative liabilities	24,000,000,000	27,000,000,000
Credit derivatives
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	95,000,000,000	94,000,000,000
Fair value of derivative liabilities	116,000,000,000	109,000,000,000
Other—net
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	13,000,000,000	17,000,000,000
Fair value of derivative liabilities	(40,000,000,000)	(47,000,000,000)
Not designated as hedges
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	9,931,000,000,000	11,997,000,000,000
Fair value of derivative liabilities	9,424,000,000,000	11,709,000,000,000
Not designated as hedges | Interest rate contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	6,430,000,000,000	7,718,000,000,000
Fair value of derivative liabilities	6,138,000,000,000	7,361,000,000,000
Not designated as hedges | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	3,153,000,000,000	3,910,000,000,000
Fair value of derivative liabilities	2,948,000,000,000	4,022,000,000,000
Not designated as hedges | Equity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	216,000,000,000	231,000,000,000
Fair value of derivative liabilities	238,000,000,000	237,000,000,000
Not designated as hedges | Commodity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	24,000,000,000	27,000,000,000
Fair value of derivative liabilities	24,000,000,000	27,000,000,000
Not designated as hedges | Credit derivatives
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	95,000,000,000	94,000,000,000
Fair value of derivative liabilities	116,000,000,000	109,000,000,000
Not designated as hedges | Other—net
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	13,000,000,000	17,000,000,000
Fair value of derivative liabilities	(40,000,000,000)	(47,000,000,000)
Designated as hedges
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1,000,000,000	0
Fair value of derivative liabilities	2,000,000,000	5,000,000,000
Designated as hedges | Interest rate contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Fair value of derivative liabilities	0	0
Designated as hedges | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	1,000,000,000	0
Fair value of derivative liabilities	2,000,000,000	5,000,000,000
Designated as hedges | Equity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Fair value of derivative liabilities	0	0
Designated as hedges | Commodity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Fair value of derivative liabilities	0	0
Designated as hedges | Credit derivatives
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Fair value of derivative liabilities	0	0
Designated as hedges | Other—net
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Fair value of derivative liabilities	¥ 0	¥ 0

Derivative Financial Instrume_6

Derivative Financial Instruments (Gains and Losses for Trading and Risk Management Derivatives (Not Designated as Hedging Instruments)) (Detail) - JPY (¥)	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (154,000,000,000)	¥ 90,000,000,000
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	25,000,000,000	136,000,000,000
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	0	74,000,000,000
Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(115,000,000,000)	(37,000,000,000)
Credit derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(35,000,000,000)	2,000,000,000
Other
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(29,000,000,000)	(85,000,000,000)
Foreign exchange gains (losses) - net
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(7,000,000,000)	83,000,000,000
Foreign exchange gains (losses) - net | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	0	0
Foreign exchange gains (losses) - net | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	0	74,000,000,000
Foreign exchange gains (losses) - net | Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	0	0
Foreign exchange gains (losses) - net | Credit derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	0	0
Foreign exchange gains (losses) - net | Other
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(7,000,000,000)	9,000,000,000
Trading account profits (losses) - net
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(147,000,000,000)	7,000,000,000
Trading account profits (losses) - net | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	25,000,000,000	136,000,000,000
Trading account profits (losses) - net | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	0	0
Trading account profits (losses) - net | Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(115,000,000,000)	(37,000,000,000)
Trading account profits (losses) - net | Credit derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(35,000,000,000)	2,000,000,000
Trading account profits (losses) - net | Other
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (22,000,000,000)	¥ (94,000,000,000)

Derivative Financial Instrume_7

Derivative Financial Instruments (Protection Sold Through Credit Derivatives) (Detail) - JPY (¥)	Sep. 30, 2021	Mar. 31, 2021
Credit Derivatives [Line Items]
1 year or less	¥ 548,203,000,000	¥ 517,053,000,000
1-5 years	2,651,125,000,000	3,130,734,000,000
Over 5 years	914,680,000,000	805,026,000,000
Total	4,114,008,000,000	4,452,813,000,000
(Asset)/liability	(74,830,000,000)	(69,286,000,000)
Protection Sold
Credit Derivatives [Line Items]
1 year or less	548,203,000,000	517,053,000,000
1-5 years	2,634,337,000,000	3,114,128,000,000
Over 5 years	914,680,000,000	805,026,000,000
Total	4,097,220,000,000	4,436,207,000,000
(Asset)/liability	(74,917,000,000)	(69,343,000,000)
Protection Sold | Single name credit default swaps:
Credit Derivatives [Line Items]
1 year or less	407,369,000,000	379,092,000,000
1-5 years	2,281,924,000,000	2,548,775,000,000
Over 5 years	893,059,000,000	775,041,000,000
Total	3,582,352,000,000	3,702,908,000,000
(Asset)/liability	(67,192,000,000)	(62,506,000,000)
Protection Sold | Single name credit default swaps: | Investment Grade
Credit Derivatives [Line Items]
1 year or less	337,188,000,000	294,312,000,000
1-5 years	1,914,711,000,000	2,235,390,000,000
Over 5 years	824,940,000,000	715,896,000,000
Total	3,076,839,000,000	3,245,598,000,000
(Asset)/liability	(70,434,000,000)	(67,707,000,000)
Protection Sold | Single name credit default swaps: | Non-investment grade
Credit Derivatives [Line Items]
1 year or less	70,181,000,000	84,780,000,000
1-5 years	367,213,000,000	311,702,000,000
Over 5 years	68,119,000,000	59,145,000,000
Total	505,513,000,000	455,627,000,000
(Asset)/liability	3,242,000,000	5,284,000,000
Protection Sold | Single name credit default swaps: | Not rated
Credit Derivatives [Line Items]
1 year or less	0	0
1-5 years	0	1,683,000,000
Over 5 years	0	0
Total	0	1,683,000,000
(Asset)/liability	0	(83,000,000)
Protection Sold | Index and basket credit default swaps :
Credit Derivatives [Line Items]
1 year or less	140,834,000,000	137,961,000,000
1-5 years	352,413,000,000	565,353,000,000
Over 5 years	21,621,000,000	29,985,000,000
Total	514,868,000,000	733,299,000,000
(Asset)/liability	(7,726,000,000)	(6,837,000,000)
Protection Sold | Index and basket credit default swaps : | Investment Grade
Credit Derivatives [Line Items]
1 year or less	33,000,000,000	43,000,000,000
1-5 years	266,662,000,000	470,063,000,000
Over 5 years	20,727,000,000	29,133,000,000
Total	320,389,000,000	542,196,000,000
(Asset)/liability	(5,843,000,000)	(4,753,000,000)
Protection Sold | Index and basket credit default swaps : | Non-investment grade
Credit Derivatives [Line Items]
1 year or less	50,364,000,000	35,427,000,000
1-5 years	39,172,000,000	65,319,000,000
Over 5 years	0	0
Total	89,536,000,000	100,746,000,000
(Asset)/liability	(712,000,000)	(1,165,000,000)
Protection Sold | Index and basket credit default swaps : | Not rated
Credit Derivatives [Line Items]
1 year or less	57,470,000,000	59,534,000,000
1-5 years	46,579,000,000	29,971,000,000
Over 5 years	894,000,000	852,000,000
Total	104,943,000,000	90,357,000,000
(Asset)/liability	(1,171,000,000)	(919,000,000)
Protection Sold | Other Credit Derivatives | Investment Grade
Credit Derivatives [Line Items]
1 year or less	0	0
1-5 years	16,788,000,000	16,606,000,000
Over 5 years	0	0
Total	16,788,000,000	16,606,000,000
(Asset)/liability	¥ 87,000,000	¥ 57,000,000

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, 2021	Mar. 31, 2021
Guarantor Obligations [Line Items]
Contractual or Notional amount	¥ 58,465	¥ 56,443
Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Contractual or Notional amount	4,245	4,055
Performance guarantees
Guarantor Obligations [Line Items]
Contractual or Notional amount	3,350	3,193
Derivative Instruments
Guarantor Obligations [Line Items]
Contractual or Notional amount	40,425	38,499
Liabilities of trust accounts
Guarantor Obligations [Line Items]
Contractual or Notional amount	10,411	10,656
Other
Guarantor Obligations [Line Items]
Contractual or Notional amount	¥ 34	¥ 40

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, 2021	Mar. 31, 2021
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	¥ 58,465	¥ 56,443
Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	4,245	4,055
Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	3,350	3,193
Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	7,595	7,248
Normal | Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	4,104	3,929
Normal | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	3,258	3,092
Normal | Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	7,362	7,021
Close Watch | Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	112	108
Close Watch | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	60	70
Close Watch | Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	172	178
Likely to become Bankrupt or Legally/Virtually Bankrupt | Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	25	15
Likely to become Bankrupt or Legally/Virtually Bankrupt | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	3	3
Likely to become Bankrupt or Legally/Virtually Bankrupt | Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	28	18
Not rated | Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	4	3
Not rated | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	29	28
Not rated | Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	¥ 33	¥ 31

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, 2021	Mar. 31, 2021
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 82,850	¥ 84,614
Commercial letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	925	835
Commitments to make investments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	290	281
Other
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 1	¥ 0

Contingent Liabilities (Narrati

Contingent Liabilities (Narrative) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Allowance for repayment of excess interest	¥ 22,616	¥ 24,943

Variable Interest Entities (Ass

Variable Interest Entities (Assets and Liabilities of Consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Variable Interest Entity [Line Items]
Total assets	¥ 353,793,109	¥ 353,824,625
Cash and due from banks	50,469,922	49,977,480
Interest-earning deposits in other banks	53,141,070	53,346,721
Trading account assets	45,337,381	44,444,379
Investment securities	56,684,174	57,244,496
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	105,178,996	114,370,472
Liabilities, Total	336,692,290	337,580,071
Deposits	219,943,071	229,206,936
Long-term debt	33,482,214	35,157,651
Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	18,685,541	18,128,416
Cash and due from banks	2,907	2,698
Interest-earning deposits in other banks	31,063	30,422
Trading account assets	1,066,073	959,001
Investment securities	1,721,039	1,727,292
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	15,652,916	15,247,928
All other assets	211,543	161,075
Liabilities, Total	530,471	594,819
Deposits	0	0
Other short-term borrowings	47,219	33,599
Long-term debt	415,517	457,763
All other liabilities	67,735	103,457
Consolidated VIEs | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Variable Interest Entity [Line Items]
Total assets	8,183
Liabilities, Total	1,548
Consolidated VIEs | Consolidated VIEs before Elimination
Variable Interest Entity [Line Items]
Total assets	25,973,344	26,249,510
Cash and due from banks	55,269	112,941
Interest-earning deposits in other banks	56,193	62,112
Trading account assets	1,080,724	964,893
Investment securities	2,233,541	2,246,853
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	22,305,994	22,678,094
All other assets	241,623	184,617
Liabilities, Total	25,451,588	25,821,760
Deposits	7,044,493	7,826,959
Other short-term borrowings	3,868,379	4,114,024
Long-term debt	12,199,773	11,605,353
All other liabilities	2,338,943	2,275,424
Consolidated VIEs | Consolidated VIEs before Elimination | Asset-backed conduits
Variable Interest Entity [Line Items]
Total assets	5,536,898	5,986,887
Cash and due from banks	51,918	109,439
Interest-earning deposits in other banks	32,902	40,061
Trading account assets	12,503	5,433
Investment securities	838,831	1,015,434
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	4,545,764	4,800,221
All other assets	54,980	16,299
Liabilities, Total	5,534,013	5,989,188
Deposits	0	0
Other short-term borrowings	3,785,267	4,058,248
Long-term debt	1,310,723	1,461,043
All other liabilities	438,023	469,897
Consolidated VIEs | Consolidated VIEs before Elimination | Investment funds
Variable Interest Entity [Line Items]
Total assets	450,215	374,324
Cash and due from banks	0	0
Interest-earning deposits in other banks	17,325	15,171
Trading account assets	290,036	240,327
Investment securities	46,045	41,512
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	0	0
All other assets	96,809	77,314
Liabilities, Total	8,038	15,039
Deposits	0	0
Other short-term borrowings	0	0
Long-term debt	5,868	5,831
All other liabilities	2,170	9,208
Consolidated VIEs | Consolidated VIEs before Elimination | Special purpose entities created for structured financing
Variable Interest Entity [Line Items]
Total assets	174,914	175,630
Cash and due from banks	0	0
Interest-earning deposits in other banks	1,298	2,058
Trading account assets	5,211	4,645
Investment securities	0	0
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	119,756	113,943
All other assets	48,649	54,984
Liabilities, Total	93,042	97,226
Deposits	0	0
Other short-term borrowings	0	0
Long-term debt	92,015	84,973
All other liabilities	1,027	12,253
Consolidated VIEs | Consolidated VIEs before Elimination | Repackaged instruments
Variable Interest Entity [Line Items]
Total assets	312,906	281,331
Cash and due from banks	2,911	3,179
Interest-earning deposits in other banks	0	0
Trading account assets	102,267	73,914
Investment securities	120,120	118,199
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	86,996	85,782
All other assets	612	257
Liabilities, Total	313,556	284,795
Deposits	0	0
Other short-term borrowings	21,107	21,343
Long-term debt	221,026	195,987
All other liabilities	71,423	67,465
Consolidated VIEs | Consolidated VIEs before Elimination | Securitization of the MUFG Group’s assets
Variable Interest Entity [Line Items]
Total assets	11,019,456	10,358,628
Cash and due from banks	0	0
Interest-earning deposits in other banks	996	996
Trading account assets	0	0
Investment securities	0	0
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	10,999,949	10,339,273
All other assets	18,511	18,359
Liabilities, Total	11,027,556	10,367,099
Deposits	0	0
Other short-term borrowings	30,208	31,000
Long-term debt	10,535,581	9,839,204
All other liabilities	461,767	496,895
Consolidated VIEs | Consolidated VIEs before Elimination | Trust arrangements
Variable Interest Entity [Line Items]
Total assets	8,416,454	9,029,390
Cash and due from banks	0	0
Interest-earning deposits in other banks	0	0
Trading account assets	653,599	623,466
Investment securities	1,213,296	1,071,708
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	6,549,558	7,334,215
All other assets	1	1
Liabilities, Total	8,416,792	9,029,272
Deposits	7,044,493	7,826,959
Other short-term borrowings	29,001	0
Long-term debt	0	0
All other liabilities	1,343,298	1,202,313
Consolidated VIEs | Consolidated VIEs before Elimination | Other
Variable Interest Entity [Line Items]
Total assets	62,501	43,320
Cash and due from banks	440	323
Interest-earning deposits in other banks	3,672	3,826
Trading account assets	17,108	17,108
Investment securities	15,249	0
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	3,971	4,660
All other assets	22,061	17,403
Liabilities, Total	58,591	39,141
Deposits	0	0
Other short-term borrowings	2,796	3,433
Long-term debt	34,560	18,315
All other liabilities	21,235	17,393
Consolidated VIEs | The amounts eliminated in consolidation
Variable Interest Entity [Line Items]
Total assets	(7,287,803)	(8,121,094)
Cash and due from banks	(52,362)	(110,243)
Interest-earning deposits in other banks	(25,130)	(31,690)
Trading account assets	(14,651)	(5,892)
Investment securities	(512,502)	(519,561)
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	(6,653,078)	(7,430,166)
All other assets	(30,080)	(23,542)
Liabilities, Total	(14,764,238)	(14,679,458)
Deposits	(2,050)	0
Other short-term borrowings	(1,907,983)	(2,422,978)
Long-term debt	(11,781,009)	(11,144,547)
All other liabilities	(1,073,196)	(1,111,933)
Consolidated VIEs | The amount of liabilities with recourse to the general credit of the MUFG Group
Variable Interest Entity [Line Items]
Liabilities, Total	(10,156,879)	(10,547,483)
Deposits	(7,042,443)	(7,826,959)
Other short-term borrowings	(1,913,177)	(1,657,447)
Long-term debt	(3,247)	(3,043)
All other liabilities	¥ (1,198,012)	¥ (1,060,034)

Variable Interest Entities (A_2

Variable Interest Entities (Assets and Liabilities of Non-consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Variable Interest Entity [Line Items]
Total assets	¥ 353,793,109	¥ 353,824,625
Liabilities, Total	336,692,290	337,580,071
Non-consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	250,517,456	241,164,323
Maximum exposure	19,047,123	18,790,574
Total assets	14,954,948	14,939,167
Trading account assets	1,295,852	1,824,640
Investment securities	4,381,622	4,268,142
Loans	9,086,165	8,690,937
All other assets	191,309	155,448
Liabilities, Total	30,505	179,568
All other liabilities	30,505	179,568
Non-consolidated VIEs | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Variable Interest Entity [Line Items]
Total assets	15,957
Non-consolidated VIEs | Asset-backed conduits
Variable Interest Entity [Line Items]
Total assets	23,029,409	25,491,847
Maximum exposure	5,402,493	5,606,965
Total assets	4,177,144	4,211,342
Trading account assets	171	277
Investment securities	1,588,926	1,598,992
Loans	2,588,047	2,612,073
All other assets	0	0
Liabilities, Total	33	0
All other liabilities	33	0
Non-consolidated VIEs | Investment funds
Variable Interest Entity [Line Items]
Total assets	102,739,859	102,840,486
Maximum exposure	2,860,451	2,646,071
Total assets	2,370,234	2,288,210
Trading account assets	332,708	538,190
Investment securities	504,543	501,434
Loans	1,486,401	1,213,179
All other assets	46,582	35,407
Liabilities, Total	0	114,911
All other liabilities	0	114,911
Non-consolidated VIEs | Special purpose entities created for structured financing
Variable Interest Entity [Line Items]
Total assets	37,739,921	38,771,947
Maximum exposure	4,344,864	4,409,839
Total assets	3,034,948	3,254,145
Trading account assets	299,681	476,784
Investment securities	20,897	25,234
Loans	2,705,792	2,745,441
All other assets	8,578	6,686
Liabilities, Total	2,155	10,447
All other liabilities	2,155	10,447
Non-consolidated VIEs | Repackaged instruments
Variable Interest Entity [Line Items]
Total assets	8,857,947	8,604,182
Maximum exposure	3,120,016	3,088,564
Total assets	3,053,769	3,008,695
Trading account assets	468,240	611,245
Investment securities	2,259,704	2,142,482
Loans	273,258	204,332
All other assets	52,567	50,636
Liabilities, Total	0	29,478
All other liabilities	0	29,478
Non-consolidated VIEs | Other
Variable Interest Entity [Line Items]
Total assets	78,150,320	65,455,861
Maximum exposure	3,319,299	3,039,135
Total assets	2,318,853	2,176,775
Trading account assets	195,052	198,144
Investment securities	7,552	0
Loans	2,032,667	1,915,912
All other assets	83,582	62,719
Liabilities, Total	28,317	24,732
All other liabilities	¥ 28,317	¥ 24,732

Fees and Commissions Income (De

Fees and Commissions Income (Details of Fees and Commissions Income) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	¥ 798,065	¥ 699,772
Fees and commissions on deposits
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	25,847	26,221
Fees and commissions on remittances and transfers
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	83,029	82,125
Fees and commissions on foreign trading business
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	33,903	29,195
Fees and commissions on credit card business
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	99,738	96,131
Fees and commissions on security-related services
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	132,161	121,629
Fees and commissions on administration and management services for investment funds
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	145,660	106,186
Trust fees
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	66,120	61,003
Guarantee fees
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	22,431	22,802
Insurance commissions
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	20,763	19,444
Fees and commissions on real estate business
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	20,392	13,917
Other fees and commissions
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	¥ 148,021	¥ 121,119

Business Segments (Narrative) (

Business Segments (Narrative) (Detail) ¥ in Billions	Apr. 01, 2021	Sep. 30, 2021segment	Sep. 30, 2020JPY (¥)
Segment Reporting Information [Line Items]
Number of operating segments | segment		7
Business Plan, Term	3 years
Retail & Commercial Banking Business Group
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)			¥ 104.6
Asset Management & Investor Services Business Group
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)			1.3
Japanese Corporate & Investment Banking Business Group
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)			0.6
Operating Segments | Global Markets Business Group
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)			0.9
Operating Segments | Global Corporate & Investment Banking Business Group | Customer Business
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)			2.4
Operating Segments | Global Commercial Banking Business Group | Customer Business
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)			0.9
Other
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)			¥ 6.5

Business Segments (Financial In

Business Segments (Financial Information by Business Segment) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Business segment information
Net revenue:	¥ 2,013,500	¥ 2,096,100
Net interest income	979,452	1,030,417
Operating expenses	1,379,400	1,363,000
Operating profit (loss)	634,100	733,100
BK and TB
Business segment information
Net revenue:	994,600	1,047,000
Net interest income	582,300	488,700
Net fees	292,600	272,700
Other	119,700	285,600
Other than BK and TB
Business segment information
Net revenue:	1,018,900	1,049,100
Operating Segments | Customer Business
Business segment information
Net revenue:	1,701,100	1,622,700
Net interest income	366,200	339,700
Net fees	328,400	300,700
Other	35,300	24,100
Operating expenses	1,205,100	1,172,700
Operating profit (loss)	496,000	450,000
Operating Segments | BK and TB | Customer Business
Business segment information
Net revenue:	729,900	664,500
Operating Segments | Other than BK and TB | Customer Business
Business segment information
Net revenue:	971,200	958,200
Operating Segments | Digital Service Business Group | Customer Business
Business segment information
Net revenue:	364,500	365,400
Net interest income	110,000	113,300
Net fees	20,200	14,100
Other	3,000	1,300
Operating expenses	276,200	271,900
Operating profit (loss)	88,300	93,500
Operating Segments | Digital Service Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	133,200	128,700
Operating Segments | Digital Service Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	231,300	236,700
Operating Segments | Retail & Commercial Banking Business Group | Customer Business
Business segment information
Net revenue:	287,500	251,900
Net interest income	82,100	81,900
Net fees	90,000	78,700
Other	9,400	8,200
Operating expenses	247,800	247,400
Operating profit (loss)	39,700	4,500
Operating Segments | Retail & Commercial Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	181,500	168,800
Operating Segments | Retail & Commercial Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	106,000	83,100
Operating Segments | Japanese Corporate & Investment Banking Business Group | Customer Business
Business segment information
Net revenue:	264,700	252,200
Net interest income	96,000	81,000
Net fees	87,300	95,700
Other	22,500	22,600
Operating expenses	156,300	155,500
Operating profit (loss)	108,400	96,700
Operating Segments | Japanese Corporate & Investment Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	205,800	199,300
Operating Segments | Japanese Corporate & Investment Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	58,900	52,900
Operating Segments | Global Corporate & Investment Banking Business Group | Customer Business
Business segment information
Net revenue:	376,800	415,400
Net interest income	900	600
Net fees	0	0
Other	0	(100)
Operating expenses	267,200	263,500
Operating profit (loss)	109,600	151,900
Operating Segments | Global Corporate & Investment Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	900	500
Operating Segments | Global Corporate & Investment Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	375,900	414,900
Operating Segments | Global Commercial Banking Business Group | Customer Business
Business segment information
Net revenue:	176,100	138,200
Net interest income	4,100	2,200
Net fees	48,600	44,700
Other	0	(100)
Operating expenses	118,400	102,900
Operating profit (loss)	57,700	35,300
Operating Segments | Global Commercial Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	52,700	46,800
Operating Segments | Global Commercial Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	123,400	91,400
Operating Segments | Asset Management & Investor Services Business Group | Customer Business
Business segment information
Net revenue:	231,500	199,600
Net interest income	73,100	60,700
Net fees	82,300	67,500
Other	400	(7,800)
Operating expenses	139,200	131,500
Operating profit (loss)	92,300	68,100
Operating Segments | Asset Management & Investor Services Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	155,800	120,400
Operating Segments | Asset Management & Investor Services Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	75,700	79,200
Operating Segments | Global Markets Business Group
Business segment information
Net revenue:	280,800	464,800
Net interest income	127,700	104,700
Net fees	(4,500)	1,400
Other	68,900	238,700
Operating expenses	118,200	114,700
Operating profit (loss)	162,600	350,100
Operating Segments | Global Markets Business Group | BK and TB
Business segment information
Net revenue:	192,100	344,800
Operating Segments | Global Markets Business Group | Other than BK and TB
Business segment information
Net revenue:	88,700	120,000
Other
Business segment information
Net revenue:	31,600	8,600
Net interest income	88,400	44,300
Net fees	(31,300)	(29,400)
Other	15,500	22,800
Operating expenses	56,100	75,600
Operating profit (loss)	(24,500)	(67,000)
Other | BK and TB
Business segment information
Net revenue:	72,600	37,700
Other | Other than BK and TB
Business segment information
Net revenue:	¥ (41,000)	¥ (29,100)

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, 2021	Sep. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	¥ 634,100	¥ 733,100
Reversal of (Provision for) credit losses	10,838	(209,806)
Foreign exchange gains (losses)—net	5,382	69,433
Trading account profits —net	59,171	244,303
Equity investment securities gains—net	(1,913)	17,136
Equity in earnings of equity method investees—net	216,085	140,420
Impairment of goodwill	0	(106,479)
Reversal of off-balance sheet credit instruments	6,381	36,551
Income before income tax expense	1,050,529	1,146,114
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	634,000	733,000
Reversal of (Provision for) credit losses	11,000	(210,000)
Foreign exchange gains (losses)—net	(46,000)	87,000
Trading account profits —net	4,000	83,000
Equity investment securities gains—net	289,000	694,000
Debt investment securities losses—net	(24,000)	(204,000)
Equity in earnings of equity method investees—net	216,000	140,000
Impairment of goodwill	0	(106,000)
Reversal of off-balance sheet credit instruments	6,000	37,000
Other—net	(39,000)	(108,000)
Income before income tax expense	¥ 1,051,000	¥ 1,146,000

Fair Value (Assets and Liabilit

Fair Value (Assets and Liabilities Measured at Fair Value by Level on Recurring Basis) (Detail) - JPY (¥)	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020
Assets
Trading derivative assets	¥ 9,932,000,000,000	¥ 11,997,000,000,000
Available-for-sale debt securities	47,099,281,000,000	47,117,813,000,000
Equity securities	6,313,287,000,000	6,222,920,000,000
Liabilities
Trading derivative liabilities	9,426,000,000,000	11,714,000,000,000
Obligation to return securities received as collateral	5,975,000,000,000	6,582,000,000,000
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Assets
Trading derivative assets	87,000,000,000
Available-for-sale debt securities	2,265,674,000,000
Liabilities
Trading derivative liabilities	17,000,000,000
Japanese national government and Japanese government agency bonds
Assets
Available-for-sale debt securities	36,214,999,000,000	35,273,211,000,000
Japanese prefectural and municipal bonds
Assets
Available-for-sale debt securities	4,016,073,000,000	3,731,513,000,000
Foreign government and official institution bonds
Assets
Available-for-sale debt securities	3,392,260,000,000	2,926,963,000,000
Corporate bonds
Assets
Available-for-sale debt securities	1,089,325,000,000	1,134,270,000,000
Residential mortgage-backed securities
Assets
Available-for-sale debt securities	1,705,002,000,000	1,467,130,000,000
Commercial mortgage-backed securities
Assets
Available-for-sale debt securities	495,368,000,000	464,565,000,000
Asset-backed securities
Assets
Available-for-sale debt securities	1,402,729,000,000	1,384,485,000,000
Other debt securities
Assets
Available-for-sale debt securities	177,079,000,000	171,578,000,000
Commercial paper
Assets
Available-for-sale debt securities	872,120,000,000	564,098,000,000
Fair Value, Measurements, Recurring
Assets
Trading account assets:	35,369,555,000,000	32,360,686,000,000
Trading derivative assets	9,918,837,000,000	11,981,438,000,000
Available-for-sale debt securities	49,364,955,000,000	47,117,813,000,000
Equity securities	5,886,905,000,000	5,805,061,000,000
Other	867,717,000,000	1,263,701,000,000
Total	101,407,969,000,000	98,528,699,000,000
Liabilities
Trading securities sold, not yet purchased	79,268,000,000	261,138,000,000
Trading derivative liabilities	9,465,044,000,000	11,756,415,000,000
Obligation to return securities received as collateral	5,974,802,000,000	6,581,759,000,000
Other	495,378,000,000	556,341,000,000
Total	16,014,492,000,000	19,155,653,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1,069,273,000,000	1,135,409,000,000	¥ 1,116,285,000,000	¥ 881,017,000,000
Fair Value, Measurements, Recurring | Trading derivatives—net
Liabilities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	28,476,000,000	25,027,000,000	¥ 20,236,000,000	¥ 3,477,000,000
Fair Value, Measurements, Recurring | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Assets
Trading derivative assets	86,916,000,000
Available-for-sale debt securities	2,265,674,000,000
Liabilities
Trading derivative liabilities	17,250,000,000
Fair Value, Measurements, Recurring | Level 1
Assets
Trading account assets:	19,693,104,000,000	18,439,146,000,000
Trading derivative assets	143,235,000,000	136,515,000,000
Available-for-sale debt securities	34,410,091,000,000	34,010,613,000,000
Equity securities	5,640,412,000,000	5,530,077,000,000
Other	830,251,000,000	1,202,230,000,000
Total	60,717,093,000,000	59,318,581,000,000
Liabilities
Trading securities sold, not yet purchased	73,815,000,000	260,149,000,000
Trading derivative liabilities	142,480,000,000	150,750,000,000
Obligation to return securities received as collateral	5,869,080,000,000	6,484,452,000,000
Other	0	0
Total	6,085,375,000,000	6,895,351,000,000
Fair Value, Measurements, Recurring | Level 2
Assets
Trading account assets:	14,976,853,000,000	13,165,127,000,000
Trading derivative assets	9,707,756,000,000	11,774,865,000,000
Available-for-sale debt securities	14,679,359,000,000	12,817,584,000,000
Equity securities	196,343,000,000	229,415,000,000
Other	21,922,000,000	42,687,000,000
Total	39,582,233,000,000	38,029,678,000,000
Liabilities
Trading securities sold, not yet purchased	5,453,000,000	989,000,000
Trading derivative liabilities	9,283,194,000,000	11,560,634,000,000
Obligation to return securities received as collateral	105,722,000,000	97,307,000,000
Other	491,802,000,000	558,553,000,000
Total	9,886,171,000,000	12,217,483,000,000
Fair Value, Measurements, Recurring | Level 3
Assets
Trading account assets:	699,598,000,000	756,413,000,000
Trading derivative assets	67,846,000,000	70,058,000,000
Available-for-sale debt securities	275,505,000,000	289,616,000,000
Equity securities	50,150,000,000	45,569,000,000
Other	15,544,000,000	18,784,000,000
Total	1,108,643,000,000	1,180,440,000,000
Liabilities
Trading securities sold, not yet purchased	0	0
Trading derivative liabilities	39,370,000,000	45,031,000,000
Obligation to return securities received as collateral	0	0
Other	3,576,000,000	(2,212,000,000)
Total	42,946,000,000	42,819,000,000
Fair Value, Measurements, Recurring | Japanese national government and Japanese government agency bonds
Assets
Available-for-sale debt securities	36,214,999,000,000	35,273,211,000,000
Fair Value, Measurements, Recurring | Japanese national government and Japanese government agency bonds | Level 1
Assets
Available-for-sale debt securities	32,188,385,000,000	32,073,409,000,000
Fair Value, Measurements, Recurring | Japanese national government and Japanese government agency bonds | Level 2
Assets
Available-for-sale debt securities	4,026,614,000,000	3,199,802,000,000
Fair Value, Measurements, Recurring | Japanese national government and Japanese government agency bonds | Level 3
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Japanese prefectural and municipal bonds
Assets
Available-for-sale debt securities	4,016,073,000,000	3,731,513,000,000
Fair Value, Measurements, Recurring | Japanese prefectural and municipal bonds | Level 1
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Japanese prefectural and municipal bonds | Level 2
Assets
Available-for-sale debt securities	4,016,073,000,000	3,731,513,000,000
Fair Value, Measurements, Recurring | Japanese prefectural and municipal bonds | Level 3
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Foreign government and official institution bonds
Assets
Available-for-sale debt securities	3,392,260,000,000	2,926,963,000,000
Fair Value, Measurements, Recurring | Foreign government and official institution bonds | Level 1
Assets
Available-for-sale debt securities	2,221,706,000,000	1,937,204,000,000
Fair Value, Measurements, Recurring | Foreign government and official institution bonds | Level 2
Assets
Available-for-sale debt securities	1,153,086,000,000	973,041,000,000
Fair Value, Measurements, Recurring | Foreign government and official institution bonds | Level 3
Assets
Available-for-sale debt securities	17,468,000,000	16,718,000,000
Fair Value, Measurements, Recurring | Corporate bonds
Assets
Available-for-sale debt securities	1,089,325,000,000	1,134,270,000,000
Fair Value, Measurements, Recurring | Corporate bonds | Level 1
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Corporate bonds | Level 2
Assets
Available-for-sale debt securities	1,086,177,000,000	1,134,108,000,000
Fair Value, Measurements, Recurring | Corporate bonds | Level 3
Assets
Available-for-sale debt securities	3,148,000,000	162,000,000
Fair Value, Measurements, Recurring | Residential mortgage-backed securities
Assets
Available-for-sale debt securities	1,705,002,000,000	1,467,130,000,000
Fair Value, Measurements, Recurring | Residential mortgage-backed securities | Level 1
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Residential mortgage-backed securities | Level 2
Assets
Available-for-sale debt securities	1,704,987,000,000	1,467,115,000,000
Fair Value, Measurements, Recurring | Residential mortgage-backed securities | Level 3
Assets
Available-for-sale debt securities	15,000,000	15,000,000
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities
Assets
Available-for-sale debt securities	495,368,000,000	464,565,000,000
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | Level 1
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | Level 2
Assets
Available-for-sale debt securities	494,189,000,000	462,966,000,000
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities | Level 3
Assets
Available-for-sale debt securities	1,179,000,000	1,599,000,000
Fair Value, Measurements, Recurring | Asset-backed securities
Assets
Available-for-sale debt securities	1,402,729,000,000	1,384,485,000,000
Fair Value, Measurements, Recurring | Asset-backed securities | Level 1
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Asset-backed securities | Level 2
Assets
Available-for-sale debt securities	1,285,923,000,000	1,247,565,000,000
Fair Value, Measurements, Recurring | Asset-backed securities | Level 3
Assets
Available-for-sale debt securities	116,806,000,000	136,920,000,000
Fair Value, Measurements, Recurring | Other debt securities
Assets
Available-for-sale debt securities	177,079,000,000	171,578,000,000
Fair Value, Measurements, Recurring | Other debt securities | Level 1
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Other debt securities | Level 2
Assets
Available-for-sale debt securities	40,190,000,000	37,376,000,000
Fair Value, Measurements, Recurring | Other debt securities | Level 3
Assets
Available-for-sale debt securities	136,889,000,000	134,202,000,000
Fair Value, Measurements, Recurring | Commercial paper
Assets
Available-for-sale debt securities	872,120,000,000	564,098,000,000
Fair Value, Measurements, Recurring | Commercial paper | Level 1
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Commercial paper | Level 2
Assets
Available-for-sale debt securities	872,120,000,000	564,098,000,000
Fair Value, Measurements, Recurring | Commercial paper | Level 3
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Marketable equity securities
Assets
Equity securities	5,836,755,000,000	5,759,492,000,000
Fair Value, Measurements, Recurring | Marketable equity securities | Level 1
Assets
Equity securities	5,640,412,000,000	5,530,077,000,000
Fair Value, Measurements, Recurring | Marketable equity securities | Level 2
Assets
Equity securities	196,343,000,000	229,415,000,000
Fair Value, Measurements, Recurring | Marketable equity securities | Level 3
Assets
Equity securities	0	0
Fair Value, Measurements, Recurring | Nonmarketable equity securities
Assets
Equity securities	50,150,000,000	45,569,000,000
Fair Value, Measurements, Recurring | Nonmarketable equity securities | Level 1
Assets
Equity securities	0	0
Fair Value, Measurements, Recurring | Nonmarketable equity securities | Level 2
Assets
Equity securities	0	0
Fair Value, Measurements, Recurring | Nonmarketable equity securities | Level 3
Assets
Equity securities	50,150,000,000	45,569,000,000
Fair Value, Measurements, Recurring | Interest rate contracts
Assets
Trading derivative assets	6,430,000,000,000	7,717,955,000,000
Liabilities
Trading derivative liabilities	6,138,159,000,000	7,361,129,000,000
Fair Value, Measurements, Recurring | Interest rate contracts | Level 1
Assets
Trading derivative assets	26,988,000,000	23,906,000,000
Liabilities
Trading derivative liabilities	10,020,000,000	10,696,000,000
Fair Value, Measurements, Recurring | Interest rate contracts | Level 2
Assets
Trading derivative assets	6,375,295,000,000	7,673,031,000,000
Liabilities
Trading derivative liabilities	6,122,010,000,000	7,343,594,000,000
Fair Value, Measurements, Recurring | Interest rate contracts | Level 3
Assets
Trading derivative assets	27,717,000,000	21,018,000,000
Liabilities
Trading derivative liabilities	6,129,000,000	6,839,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts
Assets
Trading derivative assets	3,153,343,000,000	3,910,162,000,000
Liabilities
Trading derivative liabilities	2,948,428,000,000	4,022,141,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts | Level 1
Assets
Trading derivative assets	2,136,000,000	929,000,000
Liabilities
Trading derivative liabilities	981,000,000	977,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts | Level 2
Assets
Trading derivative assets	3,145,866,000,000	3,896,713,000,000
Liabilities
Trading derivative liabilities	2,944,304,000,000	4,015,927,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts | Level 3
Assets
Trading derivative assets	5,341,000,000	12,520,000,000
Liabilities
Trading derivative liabilities	3,143,000,000	5,237,000,000
Fair Value, Measurements, Recurring | Equity contracts
Assets
Trading derivative assets	215,947,000,000	231,575,000,000
Liabilities
Trading derivative liabilities	238,280,000,000	237,418,000,000
Fair Value, Measurements, Recurring | Equity contracts | Level 1
Assets
Trading derivative assets	114,111,000,000	111,680,000,000
Liabilities
Trading derivative liabilities	131,479,000,000	139,077,000,000
Fair Value, Measurements, Recurring | Equity contracts | Level 2
Assets
Trading derivative assets	93,698,000,000	113,586,000,000
Liabilities
Trading derivative liabilities	100,806,000,000	92,655,000,000
Fair Value, Measurements, Recurring | Equity contracts | Level 3
Assets
Trading derivative assets	8,138,000,000	6,309,000,000
Liabilities
Trading derivative liabilities	5,995,000,000	5,686,000,000
Fair Value, Measurements, Recurring | Commodity contracts
Assets
Trading derivative assets	23,642,000,000	26,897,000,000
Liabilities
Trading derivative liabilities	23,695,000,000	26,960,000,000
Fair Value, Measurements, Recurring | Commodity contracts | Level 1
Assets
Trading derivative assets	0	0
Liabilities
Trading derivative liabilities	0	0
Fair Value, Measurements, Recurring | Commodity contracts | Level 2
Assets
Trading derivative assets	0	1,000,000
Liabilities
Trading derivative liabilities	0	1,000,000
Fair Value, Measurements, Recurring | Commodity contracts | Level 3
Assets
Trading derivative assets	23,642,000,000	26,896,000,000
Liabilities
Trading derivative liabilities	23,695,000,000	26,959,000,000
Fair Value, Measurements, Recurring | Credit derivatives
Assets
Trading derivative assets	95,220,000,000	93,888,000,000
Liabilities
Trading derivative liabilities	116,162,000,000	108,540,000,000
Fair Value, Measurements, Recurring | Credit derivatives | Level 1
Assets
Trading derivative assets	0	0
Liabilities
Trading derivative liabilities	0	0
Fair Value, Measurements, Recurring | Credit derivatives | Level 2
Assets
Trading derivative assets	92,897,000,000	91,534,000,000
Liabilities
Trading derivative liabilities	116,074,000,000	108,457,000,000
Fair Value, Measurements, Recurring | Credit derivatives | Level 3
Assets
Trading derivative assets	2,323,000,000	2,354,000,000
Liabilities
Trading derivative liabilities	88,000,000	83,000,000
Fair Value, Measurements, Recurring | Other
Assets
Trading derivative assets	685,000,000	961,000,000
Liabilities
Trading derivative liabilities	320,000,000	227,000,000
Fair Value, Measurements, Recurring | Other | Level 1
Assets
Trading derivative assets	0	0
Liabilities
Trading derivative liabilities	0	0
Fair Value, Measurements, Recurring | Other | Level 2
Assets
Trading derivative assets	0	0
Liabilities
Trading derivative liabilities	0	0
Fair Value, Measurements, Recurring | Other | Level 3
Assets
Trading derivative assets	685,000,000	961,000,000
Liabilities
Trading derivative liabilities	320,000,000	227,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds
Assets
Trading account assets:	7,613,508,000,000	7,201,833,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds | Level 1
Assets
Trading account assets:	7,271,079,000,000	6,800,379,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds | Level 2
Assets
Trading account assets:	342,429,000,000	401,454,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds | Level 3
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds
Assets
Trading account assets:	136,983,000,000	193,936,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds | Level 1
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds | Level 2
Assets
Trading account assets:	136,983,000,000	193,936,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds | Level 3
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds
Assets
Trading account assets:	10,711,851,000,000	9,959,753,000,000
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds | Level 1
Assets
Trading account assets:	10,285,602,000,000	9,508,030,000,000
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds | Level 2
Assets
Trading account assets:	424,816,000,000	450,443,000,000
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds | Level 3
Assets
Trading account assets:	1,433,000,000	1,280,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds
Assets
Trading account assets:	2,835,731,000,000	2,711,811,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds | Level 1
Assets
Trading account assets:	4,222,000,000	5,123,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds | Level 2
Assets
Trading account assets:	2,830,826,000,000	2,706,611,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds | Level 3
Assets
Trading account assets:	683,000,000	77,000,000
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities
Assets
Trading account assets:	7,788,583,000,000	6,167,340,000,000
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities | Level 1
Assets
Trading account assets:	0	27,000,000
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities | Level 2
Assets
Trading account assets:	7,788,583,000,000	6,166,313,000,000
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities | Level 3
Assets
Trading account assets:	0	1,000,000,000
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities
Assets
Trading account assets:	1,374,216,000,000	1,382,517,000,000
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities | Level 1
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities | Level 2
Assets
Trading account assets:	1,118,202,000,000	1,045,706,000,000
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities | Level 3
Assets
Trading account assets:	256,014,000,000	336,811,000,000
Fair Value, Measurements, Recurring | Debt securities | Other debt securities
Assets
Trading account assets:	279,952,000,000	277,635,000,000
Fair Value, Measurements, Recurring | Debt securities | Other debt securities | Level 1
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Debt securities | Other debt securities | Level 2
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Debt securities | Other debt securities | Level 3
Assets
Trading account assets:	279,952,000,000	277,635,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial paper
Assets
Trading account assets:	1,237,124,000,000	1,001,233,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial paper | Level 1
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Debt securities | Commercial paper | Level 2
Assets
Trading account assets:	1,237,124,000,000	1,001,233,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial paper | Level 3
Assets
Trading account assets:	0	0
Fair Value, Measurements, Recurring | Equity securities
Assets
Trading account assets:	3,391,607,000,000	3,464,628,000,000
Fair Value, Measurements, Recurring | Equity securities | Net Asset Value Of Private Equity Funds Member
Liabilities
Investment securities valued at net asset value	135,905,000,000	102,255,000,000
Unfunded commitments	84,769,000,000	97,413,000,000
Fair Value, Measurements, Recurring | Equity securities | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Assets
Trading account assets:	2,733,000,000
Fair Value, Measurements, Recurring | Equity securities | Level 1
Assets
Trading account assets:	2,132,201,000,000	2,125,587,000,000
Fair Value, Measurements, Recurring | Equity securities | Level 2
Assets
Trading account assets:	1,097,890,000,000	1,199,431,000,000
Fair Value, Measurements, Recurring | Equity securities | Level 3
Assets
Trading account assets:	161,516,000,000	139,610,000,000
Fair Value, Measurements, Recurring | Real Estate Funds | Nonmarketable equity securities
Liabilities
Investment securities valued at net asset value	27,726,000,000	27,395,000,000
Unfunded commitments	1,023,000,000	1,006,000,000
Fair Value, Measurements, Recurring | Private Equity and Other Funds | Nonmarketable equity securities
Liabilities
Investment securities valued at net asset value	38,207,000,000	34,390,000,000
Unfunded commitments	¥ 8,927,000,000	¥ 4,758,000,000

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 - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	¥ 1,135,409	¥ 881,017
Total gains (losses) for the period included in earnings, Assets	22,890	16,108
Total gains (losses) for the period included in other comprehensive income, Assets	24,845	(5,657)
Purchases, Assets	392,679	296,652
Issues, Assets	(355)	(334)
Sales, Assets	(77,270)	(65,706)
Settlements, Assets	(438,828)	(158,507)
Transfers into Level 3, Assets	15,980	190,304
Transfers out of Level 3, Assets	(6,077)	(37,592)
Level 3 assets, Ending balance	1,069,273	1,116,285
Change in unrealized gains (losses) for assets still held at period end	27,268	(9,242)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 liabilities, Beginning balance	(2,212)	6,606
Total gains (losses) for the period included in earnings, Liabilities	(8,176)	(18,465)
Total gains (losses) for the period included in other comprehensive income, Liabilities	(2,341)	3,711
Purchases, Liabilities	0	0
Issues, Liabilities	8,145	30,192
Sales, Liabilities	0	0
Settlements, Liabilities	12,450	(9,309)
Transfers into Level 3, Liabilities	6,809	11,330
Transfers out of Level 3, Liabilities	7,233	(4,322)
Level 3 liabilities, Ending balance	3,576	49,251
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	(2,656)	(14,090)
Other
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 liabilities, Beginning balance	(2,212)	6,606
Total gains (losses) for the period included in earnings, Liabilities	(8,176)	(18,465)
Total gains (losses) for the period included in other comprehensive income, Liabilities	(2,341)	3,711
Purchases, Liabilities	0	0
Issues, Liabilities	8,145	30,192
Sales, Liabilities	0	0
Settlements, Liabilities	12,450	(9,309)
Transfers into Level 3, Liabilities	6,809	11,330
Transfers out of Level 3, Liabilities	7,233	(4,322)
Level 3 liabilities, Ending balance	3,576	49,251
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	(2,656)	(14,090)
Trading securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	756,413	525,946
Total gains (losses) for the period included in earnings, Assets	4,592	(627)
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	268,583	158,481
Issues, Assets	0	0
Sales, Assets	(71,430)	(65,231)
Settlements, Assets	(259,220)	(2,091)
Transfers into Level 3, Assets	660	190,391
Transfers out of Level 3, Assets	0	(27,160)
Level 3 assets, Ending balance	699,598	779,709
Change in unrealized gains (losses) for assets still held at period end	4,423	(1,434)
Trading account, debt securities | Foreign government and official institution bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	1,280	1,052
Total gains (losses) for the period included in earnings, Assets	210	188
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	28,427	12,625
Issues, Assets	0	0
Sales, Assets	(28,469)	(12,713)
Settlements, Assets	(15)	(14)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	(16)
Level 3 assets, Ending balance	1,433	1,122
Change in unrealized gains (losses) for assets still held at period end	(16)	78
Trading account, debt securities | Corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	77	144
Total gains (losses) for the period included in earnings, Assets	(69)	35
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	125	0
Issues, Assets	0	0
Sales, Assets	(100)	(179)
Settlements, Assets	0	0
Transfers into Level 3, Assets	650	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	683	0
Change in unrealized gains (losses) for assets still held at period end	(69)	0
Trading account, debt securities | Residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	1,000
Total gains (losses) for the period included in earnings, Assets	(2)
Total gains (losses) for the period included in other comprehensive income, Assets	0
Purchases, Assets	41,844
Issues, Assets	0
Sales, Assets	(42,823)
Settlements, Assets	(19)
Transfers into Level 3, Assets	0
Transfers out of Level 3, Assets	0
Level 3 assets, Ending balance	0
Change in unrealized gains (losses) for assets still held at period end	0
Trading account, debt securities | Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	336,811	416,259
Total gains (losses) for the period included in earnings, Assets	4,193	(1,685)
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	166,760	46,455
Issues, Assets	0	0
Sales, Assets	0	(46,700)
Settlements, Assets	(251,750)	(1,024)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	256,014	413,305
Change in unrealized gains (losses) for assets still held at period end	5,297	(1,728)
Trading account, debt securities | Other debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	277,635	6,651
Total gains (losses) for the period included in earnings, Assets	2,317	3,446
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	0	69,498
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	0	0
Transfers into Level 3, Assets	0	190,389
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	279,952	269,984
Change in unrealized gains (losses) for assets still held at period end	2,317	3,446
Trading account, equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	139,610	101,840
Total gains (losses) for the period included in earnings, Assets	(2,057)	(2,611)
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	31,427	29,903
Issues, Assets	0	0
Sales, Assets	(38)	(5,639)
Settlements, Assets	(7,436)	(1,053)
Transfers into Level 3, Assets	10	2
Transfers out of Level 3, Assets	0	(27,144)
Level 3 assets, Ending balance	161,516	95,298
Change in unrealized gains (losses) for assets still held at period end	(3,106)	(3,230)
Trading derivatives—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	25,027	3,477
Total gains (losses) for the period included in earnings, Assets	17,711	33,219
Total gains (losses) for the period included in other comprehensive income, Assets	1,113	(757)
Purchases, Assets	36	595
Issues, Assets	(355)	(334)
Sales, Assets	0	0
Settlements, Assets	(9,069)	(15,112)
Transfers into Level 3, Assets	(463)	(392)
Transfers out of Level 3, Assets	5,524	(460)
Level 3 assets, Ending balance	28,476	20,236
Change in unrealized gains (losses) for assets still held at period end	15,161	7,640
Trading derivatives—net | Interest rate contracts—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	14,179	(750)
Total gains (losses) for the period included in earnings, Assets	(3,916)	13,271
Total gains (losses) for the period included in other comprehensive income, Assets	653	(341)
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	2,634	(3,364)
Transfers into Level 3, Assets	8	(15)
Transfers out of Level 3, Assets	198	(396)
Level 3 assets, Ending balance	21,588	8,405
Change in unrealized gains (losses) for assets still held at period end	3,764	5,130
Trading derivatives—net | Foreign exchange contracts—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	7,283	5,005
Total gains (losses) for the period included in earnings, Assets	302	1,909
Total gains (losses) for the period included in other comprehensive income, Assets	147	(276)
Purchases, Assets	21	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	773	159
Transfers into Level 3, Assets	(471)	(377)
Transfers out of Level 3, Assets	5,857	22
Level 3 assets, Ending balance	2,198	6,442
Change in unrealized gains (losses) for assets still held at period end	369	1,226
Trading derivatives—net | Equity contracts—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	623	(4,222)
Total gains (losses) for the period included in earnings, Assets	13,378	18,054
Total gains (losses) for the period included in other comprehensive income, Assets	319	(145)
Purchases, Assets	15	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(12,327)	(11,748)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	(135)	(14)
Level 3 assets, Ending balance	2,143	1,925
Change in unrealized gains (losses) for assets still held at period end	10,907	1,288
Trading derivatives—net | Commodity contracts—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	(63)	(65)
Total gains (losses) for the period included in earnings, Assets	16	(11)
Total gains (losses) for the period included in other comprehensive income, Assets	(6)	5
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	0	0
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	(53)	(71)
Change in unrealized gains (losses) for assets still held at period end	16	0
Trading derivatives—net | Credit derivatives—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	2,271	2,727
Total gains (losses) for the period included in earnings, Assets	113	(103)
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(149)	(159)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	2,235	2,465
Change in unrealized gains (losses) for assets still held at period end	113	(103)
Trading derivatives—net | Other—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	734	782
Total gains (losses) for the period included in earnings, Assets	(14)	99
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	0	595
Issues, Assets	(355)	(334)
Sales, Assets	0	0
Settlements, Assets	0	0
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	(72)
Level 3 assets, Ending balance	365	1,070
Change in unrealized gains (losses) for assets still held at period end	(8)	99
Trading derivatives—net | Other—net | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Ending balance	12,053
Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	289,616	274,930
Total gains (losses) for the period included in earnings, Assets	(618)	(1,478)
Total gains (losses) for the period included in other comprehensive income, Assets	22,746	(4,400)
Purchases, Assets	118,700	130,042
Issues, Assets	0	0
Sales, Assets	0	(11)
Settlements, Assets	(170,482)	(141,214)
Transfers into Level 3, Assets	15,653	20
Transfers out of Level 3, Assets	110	(9,962)
Level 3 assets, Ending balance	275,505	247,927
Change in unrealized gains (losses) for assets still held at period end	7,452	(206)
Available-for-sale Securities | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Ending balance	67,266
Available-for-sale Securities | Foreign government and official institution bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	16,718	15,767
Total gains (losses) for the period included in earnings, Assets	0	0
Total gains (losses) for the period included in other comprehensive income, Assets	1,104	(682)
Purchases, Assets	4,805	3,230
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(5,159)	(1,556)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	17,468	16,759
Change in unrealized gains (losses) for assets still held at period end	(30)	0
Available-for-sale Securities | Corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	162	10,108
Total gains (losses) for the period included in earnings, Assets	(326)	(3)
Total gains (losses) for the period included in other comprehensive income, Assets	68	0
Purchases, Assets	557	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(57)	(18)
Transfers into Level 3, Assets	2,854	20
Transfers out of Level 3, Assets	110	(9,962)
Level 3 assets, Ending balance	3,148	145
Change in unrealized gains (losses) for assets still held at period end	(261)	(4)
Available-for-sale Securities | Residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	15	15
Total gains (losses) for the period included in earnings, Assets	0	0
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	0	0
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	15	15
Change in unrealized gains (losses) for assets still held at period end	0	0
Available-for-sale Securities | Commercial mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	1,599	1,977
Total gains (losses) for the period included in earnings, Assets	0	0
Total gains (losses) for the period included in other comprehensive income, Assets	104	(149)
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	(11)
Settlements, Assets	(524)	(21)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	1,179	1,796
Change in unrealized gains (losses) for assets still held at period end	9	0
Available-for-sale Securities | Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	136,920	140,875
Total gains (losses) for the period included in earnings, Assets	(292)	(1,475)
Total gains (losses) for the period included in other comprehensive income, Assets	8,690	(2,416)
Purchases, Assets	113,311	126,800
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(141,823)	(137,187)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	116,806	126,597
Change in unrealized gains (losses) for assets still held at period end	3,495	(202)
Available-for-sale Securities | Other debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	134,202	106,188
Total gains (losses) for the period included in earnings, Assets	0	0
Total gains (losses) for the period included in other comprehensive income, Assets	12,780	(1,153)
Purchases, Assets	27	12
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(22,919)	(2,432)
Transfers into Level 3, Assets	12,799	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	136,889	102,615
Change in unrealized gains (losses) for assets still held at period end	4,239	0
Investment securities, equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	45,569	39,963
Total gains (losses) for the period included in earnings, Assets	2,588	(423)
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	3,602	6,413
Issues, Assets	0	0
Sales, Assets	(1,317)	(464)
Settlements, Assets	0	0
Transfers into Level 3, Assets	130	285
Transfers out of Level 3, Assets	422	(10)
Level 3 assets, Ending balance	50,150	45,764
Change in unrealized gains (losses) for assets still held at period end	1,614	(665)
Investment securities, equity securities | Nonmarketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	45,569	39,963
Total gains (losses) for the period included in earnings, Assets	2,588	(423)
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	3,602	6,413
Issues, Assets	0	0
Sales, Assets	(1,317)	(464)
Settlements, Assets	0	0
Transfers into Level 3, Assets	130	285
Transfers out of Level 3, Assets	422	(10)
Level 3 assets, Ending balance	50,150	45,764
Change in unrealized gains (losses) for assets still held at period end	1,614	(665)
Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	18,784	36,701
Total gains (losses) for the period included in earnings, Assets	(1,383)	(14,583)
Total gains (losses) for the period included in other comprehensive income, Assets	986	(500)
Purchases, Assets	1,758	1,121
Issues, Assets	0	0
Sales, Assets	(4,523)	0
Settlements, Assets	(57)	(90)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	21	0
Level 3 assets, Ending balance	15,544	22,649
Change in unrealized gains (losses) for assets still held at period end	¥ (1,382)	¥ (14,577)

Fair Value (Quantitative Inform

Fair Value (Quantitative Information about Level 3 Fair Value Measurements) (Detail) - Fair Value, Measurements, Recurring - Level 3 ¥ in Millions	Sep. 30, 2021JPY (¥)yr	Mar. 31, 2021JPY (¥)yr
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	¥ 66,087
Interest rate contracts—net | Option model
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	¥ 20,791	¥ 12,841
Interest rate contracts—net | Option model | Correlation between interest rates | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.300	0.300
Interest rate contracts—net | Option model | Correlation between interest rates | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.654	0.619
Interest rate contracts—net | Option model | Correlation between interest rates | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.458	0.448
Interest rate contracts—net | Option model | Correlation between interest rate and foreign exchange rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.166	0.151
Interest rate contracts—net | Option model | Correlation between interest rate and foreign exchange rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.600	0.600
Interest rate contracts—net | Option model | Correlation between interest rate and foreign exchange rate | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.415	0.416
Interest rate contracts—net | Option model | Volatility | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.130	0
Interest rate contracts—net | Option model | Volatility | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	1	1
Interest rate contracts—net | Option model | Volatility | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.581	0.650
Foreign exchange contracts—net | Option model
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	¥ 2,198	¥ 7,283
Foreign exchange contracts—net | Option model | Correlation between interest rates | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.300	0.100
Foreign exchange contracts—net | Option model | Correlation between interest rates | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.700	0.700
Foreign exchange contracts—net | Option model | Correlation between interest rates | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.570	0.510
Foreign exchange contracts—net | Option model | Correlation between interest rate and foreign exchange rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0	0
Foreign exchange contracts—net | Option model | Correlation between interest rate and foreign exchange rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.600	0.600
Foreign exchange contracts—net | Option model | Correlation between interest rate and foreign exchange rate | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.391	0.389
Foreign exchange contracts—net | Option model | Volatility | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.093	0.095
Foreign exchange contracts—net | Option model | Volatility | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.225	0.221
Foreign exchange contracts—net | Option model | Volatility | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.140	0.137
Foreign exchange contracts—net | Option model | Correlation between foreign exchange rates | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.500	0.500
Foreign exchange contracts—net | Option model | Correlation between foreign exchange rates | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.706	0.706
Foreign exchange contracts—net | Option model | Correlation between foreign exchange rates | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.664	0.664
Equity contracts—net | Discounted Cash Flow
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	¥ 6,441	¥ 5,557
Equity contracts—net | Discounted Cash Flow | Term of litigation | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs | yr	0.1	0
Equity contracts—net | Discounted Cash Flow | Term of litigation | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs | yr	1.3	1.2
Equity contracts—net | Discounted Cash Flow | Term of litigation | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs | yr	0.7	0.6
Equity contracts—net | Option model
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	¥ (3,540)	¥ (4,597)
Equity contracts—net | Option model | Volatility | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.260	0.275
Equity contracts—net | Option model | Volatility | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.355	0.400
Equity contracts—net | Option model | Volatility | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.288	0.318
Equity contracts—net | Option model | Correlation between foreign exchange rate and equity | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	(0.584)	(0.584)
Equity contracts—net | Option model | Correlation between foreign exchange rate and equity | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.550	0.550
Equity contracts—net | Option model | Correlation between foreign exchange rate and equity | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.200	0.262
Equity contracts—net | Option model | Correlation between equities | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.149	0.150
Equity contracts—net | Option model | Correlation between equities | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.950	0.950
Equity contracts—net | Option model | Correlation between equities | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.565	0.540
Foreign government and official institution bonds | Return on equity method
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	¥ 17,468	¥ 16,718
Foreign government and official institution bonds | Return on equity method | Probability of default | Minimum
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 | Return on equity method | Probability of default | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.018	0.018
Foreign government and official institution bonds | Return on equity method | Probability of default | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.005	0.005
Foreign government and official institution bonds | Return on equity method | Recovery rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.550	0.350
Foreign government and official institution bonds | Return on equity method | Recovery rate | Maximum
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 | Return on equity method | Recovery rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.670	0.669
Foreign government and official institution bonds | Return on equity method | Market-required return on capital
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.100
Foreign government and official institution bonds | Return on equity method | Market-required return on capital | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.080
Foreign government and official institution bonds | Return on equity method | Market-required return on capital | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.100
Foreign government and official institution bonds | Return on equity method | Market-required return on capital | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.100	0.100
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	¥ 79,934	¥ 89,607
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow | Probability of default | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.043
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow | Probability of default | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.049
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow | Probability of default | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.047
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow | Recovery rate
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	1
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow | Recovery rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.780
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow | Recovery rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.966
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Discounted Cash Flow | Recovery rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	1	0.906
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	¥ 190,785	¥ 279,547
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Probability of default | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0	0
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Probability of default | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.859	0.837
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Probability of default | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0	0
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Recovery rate
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.600	0.574
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Recovery rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.600	0.574
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Asset correlations
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.030	0.030
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Asset correlations | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.030	0.030
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Discount factor | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.007	0.013
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Discount factor | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.009	0.016
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Discount factor | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.009	0.013
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Prepayment rate
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.242	0.183
Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities | Internal model | Prepayment rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.242	0.183
Other debt securities | Discounted Cash Flow
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	¥ 318,343	¥ 313,895
Other debt securities | Discounted Cash Flow | Liquidity premium | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.012	0.010
Other debt securities | Discounted Cash Flow | Liquidity premium | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.032	0.032
Other debt securities | Discounted Cash Flow | Liquidity premium | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.030	0.029
Other debt securities | Return on equity method
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	¥ 60,867	¥ 79,541
Other debt securities | Return on equity method | Probability of default | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.001	0
Other debt securities | Return on equity method | Probability of default | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.041	0.080
Other debt securities | Return on equity method | Probability of default | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.003	0.004
Other debt securities | Return on equity method | Recovery rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.700	0.600
Other debt securities | Return on equity method | Recovery rate | Maximum
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 | Return on equity method | Recovery rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.833	0.788
Other debt securities | Return on equity method | Market-required return on capital | Minimum
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 | Return on equity method | Market-required return on capital | Maximum
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 | Return on equity method | Market-required return on capital | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	0.100	0.100

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, 2021	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Goodwill	¥ 300,058	¥ 370,852	¥ 405,009	¥ 517,626
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	13,223	40,778
Loans	252,434	263,468
Loans held for sale	42,254	52,159
Collateral dependent loans	210,180	211,309
Premises and equipment	11,800	15,243
Intangible assets	10,377	2,421
Goodwill	0	132,976
Other assets	27,048	169,978
Investments in equity method investees	11,880	153,850
Other	15,168	16,128
Total	314,882	624,864
Fair Value, Measurements, Nonrecurring | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Intangible assets	10,273
Fair Value, Measurements, Nonrecurring | Private Equity Funds
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities valued at net asset value	19,475	24,319
Unfunded commitments related to investment securities valued at net asset value	18,494	19,101
Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	0	0
Loans	2,378	2,667
Loans held for sale	0	0
Collateral dependent loans	2,378	2,667
Premises and equipment	0	0
Intangible assets	0	0
Goodwill	0	0
Other assets	11,880	111,626
Investments in equity method investees	11,880	111,626
Other	0	0
Total	14,258	114,293
Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	8,189	32,421
Loans	4,359	5,125
Loans held for sale	0	0
Collateral dependent loans	4,359	5,125
Premises and equipment	0	0
Intangible assets	0	0
Goodwill	0	0
Other assets	0	33,840
Investments in equity method investees	0	33,840
Other	0	0
Total	12,548	71,386
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	5,034	8,357
Loans	245,697	255,676
Loans held for sale	42,254	52,159
Collateral dependent loans	203,443	203,517
Premises and equipment	11,800	15,243
Intangible assets	10,377	2,421
Goodwill	0	132,976
Other assets	15,168	24,512
Investments in equity method investees	0	8,384
Other	15,168	16,128
Total	¥ 288,076	¥ 439,185

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, 2021	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 54,155	¥ 295,299
Investment securities
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	1,759	(701)
Loans
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	15,777	89,082
Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	759	5,620
Loans | Collateral dependent loans
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	15,018	83,462
Premises and equipment
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	1,660	8,569
Intangible assets
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	17,459	4,286
Goodwill
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	0	106,479
Other assets
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	17,500	87,584
Other assets | Investments in equity method investees
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	7,020	53,138
Other assets | Other
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 10,480	¥ 34,446

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, 2021	Sep. 30, 2020
Financial liabilities:
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	¥ 36,785	¥ (32,750)
Financial liabilities: | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	36,785	(32,750)
Financial liabilities: | Foreign exchange gains (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Financial liabilities: | Other short-term borrowings
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	4,383	(15,805)
Financial liabilities: | Other short-term borrowings | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	4,383	(15,805)
Financial liabilities: | Other short-term borrowings | Foreign exchange gains (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Financial liabilities: | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	32,402	(16,945)
Financial liabilities: | Long-term debt | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	32,402	(16,945)
Financial liabilities: | Long-term debt | Foreign exchange gains (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Financial assets:
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	163,266	(89,160)
Financial assets: | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	41,324	148,265
Financial assets: | Foreign exchange gains (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	121,942	(237,425)
Financial assets: | Trading account securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	163,266	(89,160)
Financial assets: | Trading account securities | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	41,324	148,265
Financial assets: | Trading account securities | Foreign exchange gains (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	¥ 121,942	¥ (237,425)

Fair Value (Differences between

Fair Value (Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2021	Mar. 31, 2021
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	¥ 513,292	¥ 420,227
Fair value	499,929	402,823
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	(13,363)	(17,404)
Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	513,292	420,227
Fair value	499,929	402,823
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	¥ (13,363)	¥ (17,404)

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, 2021	Mar. 31, 2021
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	¥ 50,694	¥ 49,977
Interest-earning deposits in other banks	54,429	53,347
Call loans and funds sold	1,456	1,256
Receivables under resale agreements	12,071	13,780
Receivables under securities borrowing transactions	3,466	3,370
Investment securities	4,130	3,904
Loans, net of allowance for credit losses	111,527	114,350
Other financial assets	7,064	8,108
Non-interest-bearing	39,174	38,521
Interest-bearing	190,708	190,695
Total deposits	229,882	229,216
Call money and funds purchased	2,580	2,354
Payables under repurchase agreements	25,489	24,568
Payables under securities lending transactions	834	843
Due to trust account and other short-term borrowings	18,069	17,883
Long-term debt	33,705	34,773
Other financial liabilities	8,196	7,027
Carrying amounts of investments in equity method investees	2,774	2,560
Carrying amount | Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	224
Interest-earning deposits in other banks	1,288
Investment securities	858
Loans, net of allowance for credit losses	6,360
Other financial assets	310
Total deposits	9,933
Long-term debt	705
Other financial liabilities	160
Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	50,694	49,977
Interest-earning deposits in other banks	54,429	53,347
Call loans and funds sold	1,456	1,256
Receivables under resale agreements	12,071	13,780
Receivables under securities borrowing transactions	3,466	3,370
Investment securities	4,172	3,939
Loans, net of allowance for credit losses	112,821	115,709
Other financial assets	7,064	8,108
Non-interest-bearing	39,174	38,521
Interest-bearing	190,718	190,712
Total deposits	229,892	229,233
Call money and funds purchased	2,580	2,354
Payables under repurchase agreements	25,489	24,568
Payables under securities lending transactions	834	843
Due to trust account and other short-term borrowings	18,069	17,883
Long-term debt	34,011	35,042
Other financial liabilities	8,196	7,027
Estimated fair value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	50,694	49,977
Interest-earning deposits in other banks	0	0
Call loans and funds sold	0	0
Receivables under resale agreements	0	0
Receivables under securities borrowing transactions	0	0
Investment securities	1,120	1,123
Loans, net of allowance for credit losses	2	3
Other financial assets	0	0
Non-interest-bearing	0	0
Interest-bearing	0	0
Total deposits	0	0
Call money and funds purchased	0	0
Payables under repurchase agreements	0	0
Payables under securities lending transactions	0	0
Due to trust account and other short-term borrowings	0	0
Long-term debt	0	0
Other financial liabilities	0	0
Estimated fair value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	0
Interest-earning deposits in other banks	54,429	53,347
Call loans and funds sold	1,456	1,256
Receivables under resale agreements	12,071	13,780
Receivables under securities borrowing transactions	3,466	3,370
Investment securities	867	780
Loans, net of allowance for credit losses	305	298
Other financial assets	7,064	8,108
Non-interest-bearing	39,174	38,521
Interest-bearing	190,718	190,712
Total deposits	229,892	229,233
Call money and funds purchased	2,580	2,354
Payables under repurchase agreements	25,489	24,568
Payables under securities lending transactions	834	843
Due to trust account and other short-term borrowings	18,069	17,883
Long-term debt	34,011	35,042
Other financial liabilities	8,196	7,027
Estimated fair value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	0	0
Interest-earning deposits in other banks	0	0
Call loans and funds sold	0	0
Receivables under resale agreements	0	0
Receivables under securities borrowing transactions	0	0
Investment securities	2,185	2,036
Loans, net of allowance for credit losses	112,514	115,408
Other financial assets	0	0
Non-interest-bearing	0	0
Interest-bearing	0	0
Total deposits	0	0
Call money and funds purchased	0	0
Payables under repurchase agreements	0	0
Payables under securities lending transactions	0	0
Due to trust account and other short-term borrowings	0	0
Long-term debt	0	0
Other financial liabilities	¥ 0	¥ 0

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, 2021	Sep. 30, 2020
Equity Method Investment, Summarized Financial Information, Income and Loss
Net income applicable to Morgan Stanley	¥ 756,833	¥ 780,005
Morgan Stanley
Equity Method Investment, Summarized Financial Information, Income and Loss
Net revenues	3,240,000	2,714,000
Total non-interest expenses	2,193,000	1,838,000
Income from continuing operations before income taxes	1,037,000	838,000
Morgan Stanley | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Equity Method Investment, Summarized Financial Information, Income and Loss
Net income applicable to Morgan Stanley	¥ 793,000	¥ 632,000

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Detail) - Subsequent Event - JPY (¥) ¥ / shares in Units, ¥ in Millions	Nov. 30, 2021	Dec. 27, 2021	Mar. 31, 2022	Nov. 15, 2021
Subsequent Event [Line Items]
Number of shares authorized to be repurchased (in shares)			300,000,000
Stock repurchase program, authorized amount			¥ 150,000
Treasury stock, shares acquired (in shares)		35,600,900
Treasury stock, shares acquired, value		¥ 22,605
Treasury stock, shares retired (in shares)	300,000,000
Common Stock
Subsequent Event [Line Items]
Dividends payable (in Yen per share)				¥ 13.5
Dividends payable, total amount				¥ 173,791
Shares repurchased as % of total shares			2.33%