Mitsubishi UFJ Financial (MUFG) 6-K 26 Dec 23 Current report (foreign) Financial data

Cover Page

Cover Page	6 Months Ended
	Sep. 30, 2023
Cover [Abstract]
Document Type	6-K
Entity Registrant Name	MITSUBISHI UFJ FINANCIAL GROUP, INC.
Document Period End Date	Sep. 30, 2023
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, 2023	Mar. 31, 2023
ASSETS
Cash and due from banks	¥ 59,953,857	¥ 60,050,640
Interest-earning deposits in other banks	48,957,399	53,989,863
Cash, due from banks and interest-earning deposits in other banks	108,911,256	114,040,503
Call loans, funds sold, and receivables under resale agreements	19,339,983	15,861,426
Receivables under securities borrowing transactions	5,085,189	4,555,748
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥11,407,569 and ¥6,676,877 at March 31, 2023 and September 30, 2023) (including ¥19,691,210 and ¥17,278,705 at March 31, 2023 and September 30, 2023 measured at fair value under fair value option)	51,177,655	46,168,461
Investment securities:
Available-for-sale debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥6,277,947 and ¥4,866,092 at March 31, 2023 and September 30, 2023)	32,372,779	35,740,802
Held-to-maturity debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥8,264,085 and ¥6,587,489 at March 31, 2023 and September 30, 2023) (fair value of ¥21,386,156 and ¥24,158,087 at March 31, 2023 and September 30, 2023)	24,657,026	21,520,081
Equity securities (including assets pledged that secured parties are permitted to sell or repledge of ¥724 and ¥668 at March 31, 2023 and September 30, 2023) (including ¥4,619,120 and ¥5,188,143 at March 31, 2023 and September 30, 2023 measured at fair value)	5,659,975	5,001,048
Total investment securities	62,689,780	62,261,931
Loans, net of unearned income, unamortized premiums and deferred loan fees (including assets pledged that secured parties are permitted to sell or repledge of ¥144,288 and ¥137,332 at March 31, 2023 and September 30, 2023)	124,402,512	119,955,460
Allowance for credit losses	(1,294,757)	(1,272,898)
Net loans	123,107,755	118,682,562
Premises and equipment—net	857,991	860,578
Customers’ acceptance liability	493,943	378,525
Intangible assets—net	1,240,894	1,174,223
Goodwill	378,323	296,772
Other assets (including net of allowance for credit losses of ¥15,918 and ¥15,003 at March 31, 2023 and September 30, 2023)	18,963,934	17,455,004
Total assets	392,246,703	381,735,733
Deposits:
Domestic offices, non-interest-bearing	35,132,859	35,186,603
Domestic offices, interest-bearing	149,532,407	147,716,037
Overseas offices, principally interest-bearing	59,141,701	52,374,141
Total deposits	243,806,967	235,276,781
Call money, funds purchased, and payables under repurchase agreements	36,813,919	43,570,073
Payables under securities lending transactions	1,016,655	1,137,693
Due to trust account and other short-term borrowings (including ¥49,555 and ¥41,058 at March 31, 2023 and September 30, 2023 measured at fair value under fair value option)	14,452,706	14,309,258
Trading account liabilities	20,315,164	14,178,275
Bank acceptances outstanding	493,943	378,525
Long-term debt (including ¥431,338 and ¥339,840 at March 31, 2023 and September 30, 2023 measured at fair value under fair value option)	40,457,710	39,071,755
Other liabilities	17,432,245	17,347,206
Total liabilities	374,789,309	365,269,566
Commitments and contingent liabilities
Mitsubishi UFJ Financial Group shareholders’ equity:
Capital stock—common stock authorized, 33,000,000,000 shares; common stock issued, 12,687,710,920 shares and 12,687,710,920 shares at March 31, 2023 and September 30, 2023, with no stated value	2,090,270	2,090,270
Capital surplus	4,895,005	4,902,155
Retained earnings:
Appropriated for legal reserve	239,571	239,571
Unappropriated retained earnings	8,221,772	8,169,710
Accumulated other comprehensive income, net of taxes	1,685,007	844,192
Treasury stock, at cost—665,392,775 common shares and 662,903,215 common shares at March 31, 2023 and September 30, 2023	(481,237)	(482,552)
Total Mitsubishi UFJ Financial Group shareholders’ equity	16,650,388	15,763,346
Noncontrolling interests	807,006	702,821
Total equity	17,457,394	16,466,167
Total liabilities and equity	392,246,703	381,735,733
Consolidated VIEs
ASSETS
Cash and due from banks	7,410	8,243
Interest-earning deposits in other banks	62,613	52,031
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥11,407,569 and ¥6,676,877 at March 31, 2023 and September 30, 2023) (including ¥19,691,210 and ¥17,278,705 at March 31, 2023 and September 30, 2023 measured at fair value under fair value option)	1,308,287	1,367,928
Investment securities:
Total investment securities	2,113,141	2,076,737
Net loans	17,349,257	16,598,585
All other assets	1,096,817	998,096
Total assets	21,937,525	21,101,620
Deposits:
Total deposits	0	0
Long-term debt (including ¥431,338 and ¥339,840 at March 31, 2023 and September 30, 2023 measured at fair value under fair value option)	374,102	406,429
Other short-term borrowings	40,145	45,432
All other liabilities	81,875	163,075
Total liabilities	¥ 496,122	¥ 614,936

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Trading account assets pledged that secured parties are permitted to sell or repledge	¥ 6,676,877	¥ 11,407,569
Trading account assets measured at fair value under fair value option	17,278,705	19,691,210
Available-for-sale debt securities pledged that secured parties are permitted to sell or repledge	4,866,092	6,277,947
Held-to-maturity debt securities pledged that secured parties are permitted to sell or repledge	6,587,489	8,264,085
Held-to-maturity debt securities, fair value	24,158,087	21,386,156
Equity securities pledged that secured parties are permitted to sell or repledge	668	724
Equity securities measured at fair value	5,188,143	4,619,120
Financing receivable, before allowance for credit loss	124,839,339	120,356,472
Allowance for credit losses	15,003	15,918
Due to trust account and other short-term borrowings measured at fair value under fair value option	41,058	49,555
Long-term debt measured at fair value under fair value option	¥ 339,840	¥ 431,338
Common stock, authorized (in shares)	33,000,000,000	33,000,000,000
Common stock, issued (in shares)	12,687,710,920	12,687,710,920
Treasury stock, shares (in shares)	662,903,215	665,392,775
Asset pledged with permission to sell or repledge
Financing receivable, before allowance for credit loss	¥ 137,332	¥ 144,288

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - JPY (¥) shares in Thousands, ¥ in Millions		6 Months Ended
		Sep. 30, 2023	Sep. 30, 2022
Interest income:
Loans, including fees		¥ 2,011,363	¥ 1,201,227
Deposits in other banks		355,192	103,477
Investment securities		355,121	237,410
Trading account assets		360,921	250,571
Call loans, funds sold, and receivables under resale agreements and securities borrowing transactions		193,947	30,721
Total		3,276,544	1,823,406
Interest expense:
Deposits		1,142,035	334,538
Call money, funds purchased, and payables under repurchase agreements and securities lending transactions		461,932	106,351
Due to trust account, other short-term borrowings and trading account liabilities		174,949	59,154
Long-term debt		252,757	156,629
Total		2,031,673	656,672
Net interest income		1,244,871	1,166,734
Provision for (reversal of) credit losses		61,772	(97,785)
Net interest income after provision for (reversal of) credit losses		1,183,099	1,264,519
Non-interest income:
Fees and commissions income		881,258	787,642
Foreign exchange losses —net		(329,089)	(126,755)
Trading account losses —net		(940,660)	(1,367,090)
Investment securities gains (losses) —net		743,395	(493,309)
Equity in earnings of equity method investees—net		214,835	186,906
Other non-interest income		86,876	38,856
Total		656,615	(973,750)
Non-interest expense:
Salaries and employee benefits		623,877	659,606
Occupancy expenses—net		76,784	78,602
Fees and commissions expenses		189,657	161,797
Outsourcing expenses, including data processing		162,312	178,132
Depreciation of premises and equipment		35,813	34,819
Amortization of intangible assets		141,668	133,124
Insurance premiums, including deposit insurance		44,684	36,745
Communications		29,391	29,273
Taxes and public charges		52,467	51,095
Reversal of off-balance sheet credit instruments		(3,646)	(12,112)
Reversal of impairment of assets held for sale		0	(134,141)
Loss on valuation adjustment for loans held for sale held by MUFG Union Bank		0	209,107
Other non-interest expenses		202,385	156,407
Total		1,555,392	1,582,454
Income (loss) before income tax expense (benefit)		284,322	(1,291,685)
Income tax expense (benefit)		15,864	(340,290)
Net income (loss) before attribution of noncontrolling interests		268,458	(951,395)
Net income attributable to noncontrolling interests		37,677	62,734
Net income (loss) attributable to Mitsubishi UFJ Financial Group		230,781	(1,014,129)
Effect of dilutive instruments:
Restricted stock units and performance stock units	[1]	(1,452)	(1,793)
Earnings (loss) applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions		¥ 229,329	¥ (1,015,922)
Shares used for the computation of basic EPS and diluted EPS (Denominator):
Weighted average common shares outstanding (in shares)		12,037,251	12,500,816
Effect of dilutive instruments:
Stock acquisition rights and the common shares of MUFG under the Board Incentive Plan (in shares)	[1]	0	0
Weighted average common shares for diluted computation (in shares)		12,037,251	12,500,816
Earnings (loss) per common share applicable to common shareholders of Mitsubishi UFJ Financial Group
Basic earnings (loss) per common share—Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group (in JPY per share)		¥ 19.17	¥ (81.13)
Diluted earnings (loss) per common share—Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group (in JPY per share)	[1]	19.05	(81.27)
Cash dividend per common share (in JPY per share)		¥ 16	¥ 14.50
[1] For the six months ended September 30, 2022 and 2023, 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, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss) before attribution of noncontrolling interests	¥ 268,458	¥ (951,395)
Other comprehensive income (loss), net of tax:
Net unrealized losses on investment securities	(162,130)	(193,709)
Net debt valuation adjustments	(22,260)	45,485
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges	15	(21,360)
Defined benefit plans	48,965	(16,865)
Foreign currency translation adjustments	1,050,954	1,449,622
Total	915,544	1,263,173
Comprehensive income	1,184,002	311,778
Net income attributable to noncontrolling interests	37,677	62,734
Other comprehensive income attributable to noncontrolling interests	74,729	65,035
Comprehensive income attributable to Mitsubishi UFJ Financial Group	¥ 1,071,596	¥ 184,009

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: Effect of adopting new guidance on troubled debt restructurings and vintage disclosures	Accumulated other comprehensive income, net of taxes:	Treasury stock, at cost:	Total Mitsubishi UFJ Financial Group shareholders’ equity	Noncontrolling interests:
Balance at beginning of period at Mar. 31, 2022		¥ 2,090,270	¥ 5,327,772	¥ 239,571	¥ 8,172,646		¥ 227,033	¥ (452,224)		¥ 691,454
Balance at beginning of period (ASU 2022-02) at Mar. 31, 2022						¥ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			(10,190)
Other—net			242							55
Common stock—¥14.50 per share and ¥16.00 per share in 2022 and 2023					(182,921)
Net change during the period	¥ 1,263,173						1,198,138			65,035
Purchases of shares of treasury stock								(238,784)
Sales of shares of treasury stock								1,918
Net increase resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies								(11)
Initial subscriptions of noncontrolling interests										16
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders										(3,403)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries										(12,556)
Decrease in noncontrolling interests related to disposition of subsidiaries										0
Net income (loss) before attribution of noncontrolling interests	(951,395)				(1,014,129)					62,734
Dividends paid to noncontrolling interests										(15,158)
Balance at end of period at Sep. 30, 2022	16,147,508	2,090,270	5,317,824	239,571	6,975,596		1,425,171	(689,101)	¥ 15,359,331	788,177
Balance at beginning of period at Mar. 31, 2023	16,466,167	2,090,270	4,902,155	239,571	8,169,710		844,192	(482,552)		702,821
Balance at beginning of period (ASU 2022-02) at Mar. 31, 2023						¥ 13,663
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation			(6,683)
Other—net			(467)							(231)
Common stock—¥14.50 per share and ¥16.00 per share in 2022 and 2023					(192,382)
Net change during the period	915,544						840,815			74,729
Purchases of shares of treasury stock								(68)
Sales of shares of treasury stock								1,666
Net increase resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies								(283)
Initial subscriptions of noncontrolling interests										34,317
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders										(16,734)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries										(7,405)
Decrease in noncontrolling interests related to disposition of subsidiaries										(817)
Net income (loss) before attribution of noncontrolling interests	268,458				230,781					37,677
Dividends paid to noncontrolling interests										(17,351)
Balance at end of period at Sep. 30, 2023	¥ 17,457,394	¥ 2,090,270	¥ 4,895,005	¥ 239,571	¥ 8,221,772		¥ 1,685,007	¥ (481,237)	¥ 16,650,388	¥ 807,006

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Equity (Unaudited) (Parenthetical) - ¥ / shares	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash dividends: common stock, per share (in JPY per share)	¥ 16	¥ 14.50
Unappropriated retained earnings:
Cash dividends: common stock, per share (in JPY per share)	¥ 16	¥ 14.50

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - JPY (¥) ¥ in Millions	6 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Cash flows from operating activities:
Net income (loss) before attribution of noncontrolling interests	¥ 268,458	¥ (951,395)
Adjustments to reconcile net income (loss) before attribution of noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization	177,481	167,943
Provision for (reversal of) credit losses (Note 4)	61,772	(97,785)
Reversal of impairment of assets held for sale	0	(134,141)
Loss on valuation adjustment for loans held for sale held by MUFG Union Bank	0	209,107
Investment securities (gains) losses—net	(743,395)	493,309
Foreign exchange (gains) losses—net	484,560	(182,854)
Equity in earnings of equity method investees—net	(214,835)	(186,906)
Benefit for deferred income tax expense	(200,007)	(541,331)
Increase in trading account assets, excluding foreign exchange contracts	(4,405,363)	(1,224,746)
Increase in trading account liabilities, excluding foreign exchange contracts	4,082,033	2,548,147
Increase in accrued interest receivable and other receivables	(138,342)	(68,686)
Increase (decrease) in accrued interest payable and other payables	(663,358)	72,278
Net decrease in accrued income taxes and increase in income tax receivables	(38,880)	(80,915)
Net decrease (increase) in collateral for derivative transactions	(737,229)	658,823
Other—net	(15,161)	(632,966)
Net cash provided by (used in) operating activities	(2,082,266)	47,882
Cash flows from investing activities:
Proceeds from sales of Available-for-sale debt securities (including proceeds from debt securities under the fair value option)	35,278,674	28,509,178
Proceeds from maturities of Available-for-sale debt securities (including proceeds from debt securities under the fair value option)	15,222,492	17,429,364
Purchases of Available-for-sale debt securities (including purchases of debt securities under the fair value option)	(42,823,777)	(39,576,717)
Proceeds from maturities of Held-to-maturity debt securities	226,392	44,469
Purchases of Held-to-maturity debt securities	(2,633,518)	(8,392,086)
Proceeds from sales and redemption of Equity securities (including proceeds from equity securities under the fair value option)	1,193,033	1,759,782
Acquisition of HC Consumer Finance Philippines, Inc., a subsidiary of Krungsri, net of cash acquired (Note 2)	(55,868)	0
Purchases of Equity securities (including purchases of equity securities under the fair value option)	(1,351,798)	(1,036,709)
Net decrease (increase) in loans	1,252,246	(3,623,985)
Net increase in call loans, funds sold, and receivables under resale agreements and securities borrowing transactions	(2,635,756)	(33,161)
Capital expenditures for premises and equipment	(47,932)	(49,054)
Purchases of intangible assets	(152,072)	(134,595)
Proceeds from sales of consolidated VIEs and subsidiaries—net	46,392	(28,499)
Other—net	(31,191)	62,856
Net cash provided by (used in) investing activities	3,487,317	(5,069,157)
Cash flows from financing activities:
Net increase in deposits	2,421,039	42,228
Net increase (decrease) in call money, funds purchased, and payables under repurchase agreements and securities lending transactions	(9,771,370)	4,545,312
Net decrease in due to trust account and other short-term borrowings	(521,193)	(10,018,516)
Proceeds from issuance of long-term debt	2,022,741	2,996,406
Repayments of long-term debt	(2,021,065)	(2,049,260)
Proceeds from sales of treasury stock	1,504	1,111
Dividends paid	(192,313)	(182,860)
Payments for acquisition of treasury stock	(68)	(238,784)
Other—net	(43,203)	(16,092)
Net cash used in financing activities	(8,103,928)	(4,920,455)
Effect of exchange rate changes on cash and cash equivalents	1,569,102	1,968,560
Net decrease in cash and cash equivalents	(5,129,775)	(7,973,170)
Cash and cash equivalents at beginning of period	114,044,090	111,111,544	¥ 111,111,544
Cash, due from banks and interest-earning deposits in other banks	108,911,256	101,684,194	114,040,503
Restricted cash included in other assets	3,059	12,622
Cash and cash equivalents reclassified as assets held for sale and included in other assets (Note 2)	0	1,441,558
Cash and cash equivalents at end of period	108,914,315	103,138,374	¥ 114,044,090
Cash paid during the period for:
Interest	1,983,677	552,301
Income taxes, net of refunds	254,751	273,730
Non-cash investing and financing activities:
Assets acquired under finance lease arrangements	5,022	7,308
Assets acquired under operating lease arrangements	22,905	13,582
Reclassification of assets and liabilities in transferred business of MUFG Union Bank to assets and liabilities held for sale (Note 2)：
Assets reclassified, excluding cash and cash equivalents	0	1,794,976
Liabilities reclassified	0	2,592,893
Acquisition of HC Consumer Finance Philippines, Inc., a subsidiary of Krungsri, (Note 2)：
Fair value of assets acquired, excluding cash and cash equivalents	151,231	0
Fair value of liabilities assumed	¥ 95,448	¥ 0

Basis of Semiannual Condensed C

Basis of Semiannual Condensed Consolidated Financial Statements	6 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Condensed Consolidated Financial Statements	BASIS OF CONDENSED CONSOLIDATED FINANCIAL STATEMENTS Description of Business Mitsubishi UFJ Financial Group, Inc. (“MUFG”) is a holding company for MUFG Bank, 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”), 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 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 have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). In certain respects, the accompanying condensed consolidated financial statements reflect adjustments to conform with U.S. GAAP and therefore are not included in the consolidated financial statements issued by MUFG in accordance with accounting principles generally accepted in Japan (“Japanese GAAP”) and certain of its subsidiaries in accordance with the corresponding applicable statutory requirements and accounting practices in their respective countries of incorporation. The major adjustments include those relating to (1) investment securities, (2) derivative financial instruments, (3) allowance for credit losses, (4) income taxes, (5) consolidation, (6) premises and equipment, (7) transfer of financial assets, (8) accrued severance indemnities and pension liabilities, (9) goodwill and other intangible assets and (10) lease transactions. The accompanying condensed semiannual consolidated financial statements should be read in conjunction with the consolidated financial statements for the fiscal year ended March 31, 2023. Certain information that would be included in annual financial statements but is not required for reporting purposes under U.S. GAAP has been omitted or condensed. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Accounting Changes Troubled Debt Restructurings and Vintage Disclosures —In March 2022, the Financial Accounting Standards Board (“FASB”) issued new guidance which eliminates the accounting and disclosure requirements for Troubled Debt Restructurings (“TDRs”) by creditors and introduces new required disclosures for loan modifications made to borrowers experiencing financial difficulty. The guidance also amends the requirement for vintage disclosures to disclose current period gross charge-offs by year of origination. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The guidance should be applied prospectively, except for requirements related to the recognition and measurement of TDRs, for which entities have the option to apply a modified retrospective transition method. The MUFG Group adopted the guidance on April 1, 2023, using the modified retrospective transition method on the requirements related to the recognition and measurement of TDRs, and there was no material impact on its financial position and results of operations. The allowance for modified loans is mainly measured using a discounted cash flow methodology that utilizes a discount rate based on the post-modification contractual interest rate, other than those in the Card segment, for which the allowance is measured using collectively-assessed allowance methodology. Recently Issued Accounting Pronouncements Fair Value Measurement of Equity Securities Subject to Contractual Sale Restriction —In June 2022, the FASB issued new guidance which clarifies the guidance when measuring the fair value of an equity security subject to contractual restrictions that prohibit the sale of an equity security. The guidance also introduces new disclosure requirements for equity securities subject to contractual sale restrictions that are measured at fair value. This guidance is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The MUFG Group is currently evaluating what effect this guidance will have on its consolidated financial statements and related disclosures.

Business Developments

Business Developments	6 Months Ended
	Sep. 30, 2023
Discontinued Operations and Disposal Groups [Abstract]
Business Developments	BUSINESS DEVELOPMENTS Sale of MUFG Union Bank and Investment 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 (“USB”) (hereinafter referred to as the “Share Transfer”). The businesses of MUFG Union Bank that the MUFG Group transferred to USB exclude the Global Corporate & Investment Banking (GCIB) business (with certain exceptions as agreed to by the parties, including certain deposits of the GCIB business that were retained by MUFG Union Bank), the Global Markets business to the extent related to the GCIB business and certain assets and liabilities. that were part of shared middle and back office functions. Under a legal agreement, the assets and liabilities of these operations were transferred to other entities within the MUFG Group prior to the Share Transfer. The carrying amount of any assets that are not covered by the guidance on long-lived assets and included in the disposal group, is necessary to be adjusted in accordance with other applicable guidance before measuring the disposal group by lower of cost or market method. The loss amount, which was recognized through lower of cost or market method from the assets and liabilities held for sale, was ¥134,141 million and recognized during the second half of the fiscal year ended March 31, 2022. However, the fair value less cost to sell exceeded the carrying value as of September 30, 2022, and the reversal of ¥134,141 million, which is included in Reversal of impairment of assets held for sale in the condensed consolidated statements of operations through the six months ended September 30, 2022, was recognized, and as a result, the valuation allowance for assets held for sale was fully reversed as of September 30, 2022. The business of MUFG Union Bank that was transferred to USB recorded pretax losses of ¥346,781 million for the six months ended September 30, 2022. On December 1, 2022, the MUFG Group sold all the issued and outstanding shares of common stock of MUFG Union Bank to USB for the agreed upon consideration, received ¥754.0 billion in cash and 44,374,155 shares, ¥276.1 billion, of USB common stock representing approximately 3% of the outstanding shares subject to future closing adjustments. Additionally, the MUFG Group will receive from USB an additional ¥464.5 billion in cash within five years of the closing date, whose discounted present value at sale was ¥396.6 billion. Before the closing of the share transfer, MUFG Union Bank declared and paid a special dividend of approximately ¥636.8 billion to MUFG’s subsidiary, MUFG Americas Holdings Corporation (“MUAH”). The MUFG Group recorded a pretax gain on the sale of MUFG Union Bank of ¥557,954 million, net of cost to sell the business during the second half of the fiscal year ended March 31, 2023. The business of MUFG Union Bank that was transferred to USB had ¥13,935.6 billion in assets at sale, including ¥2,251.3 billion of interest-earning deposits in other banks, ¥3,123.3 billion of investment securities, and ¥7,567.7 billion of loans. The total amount of liabilities was ¥13,128.0 billion, including ¥11,789.9 billion of deposits. The sale of all shares of MUFG Union Bank was completed on December 1, 2022. In August 2023, after the completion of the sale of MUFG Union Bank, MUFG Bank additionally acquired 24,000,000 shares of the common stock of USB for a purchase price of ¥136.8 billion. Following this investment, MUFG Bank’s total shareholding in USB increased to 4.39%. The proceeds received by USB for the investment were paid to MUAH to reduce the outstanding obligation due within five years of the closing date of the sale simultaneously. The repayment was not reflected on the accompanying condensed consolidated financial statements for the six months ended September 30, 2023 because the MUFG Group consolidates MUAH, based on financial information for the six months ended June 30, 2023. The six-month period of MUAH, which ends on June 30, and MUFG’s six-month period, which ends on September 30, have been treated as coterminous. Acquisition of shares in HC Consumer Finance Philippines, Inc. On June 1, 2023, MUFG Bank and its subsidiary, Krungsri acquired 100% of the shares of HC Consumer Finance Philippines, Inc. (“HC Philippines”) for ¥61,605 million in cash. As a result of the acquisition, Krungsri and MUFG Bank hold 75% and 25% of the shares respectively. The MUFG group intends to strengthen its business in Southeast Asia through the establishment of business platforms in the region in collaboration with partner banks in which MUFG Bank has invested. In executing this strategy, the MUFG Group will continue striving to contribute to the growth of Southeast Asia. The assets acquired and liabilities assumed were recorded at their estimated fair values on the acquisition date. These fair value estimates are considered provisional and are subject to change pending the receipt of additional information in relation to closing date fair values, but not to exceed a period of one year after the closing date of the acquisition. The total assets and liabilities of the acquired business were ¥130,640 million and ¥95,448 million, respectively, and the goodwill resulting from the acquisition was ¥26,328 million and allocated to the Global Commercial Banking Business Group Segment.

Investment Securities

Investment Securities	6 Months Ended
	Sep. 30, 2023
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, 2023 and September 30, 2023: At March 31, 2023: 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 ¥ 26,153,862 ¥ 16,510 ¥ 123,769 ¥ 26,046,603 Japanese prefectural and municipal bonds 2,773,750 2,063 15,872 2,759,941 Foreign government and official institution bonds 3,029,042 2,072 108,372 2,922,742 Corporate bonds 1,051,347 9,791 2,977 1,058,161 Residential mortgage-backed securities 1,110,126 569 441 1,110,254 Asset-backed securities 1,418,563 16,116 4,364 1,430,315 Other debt securities 417,755 1,873 6,842 412,786 Total ¥ 35,954,445 ¥ 48,994 ¥ 262,637 ¥ 35,740,802 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 13,860,457 ¥ 32,927 ¥ 19,789 ¥ 13,873,595 Japanese prefectural and municipal bonds 1,144,825 2,473 7,808 1,139,490 Corporate bonds 46,730 213 3 46,940 Residential mortgage-backed securities 3,913,346 13,606 105,754 3,821,198 Asset-backed securities 2,554,723 19 49,809 2,504,933 Total ¥ 21,520,081 ¥ 49,238 ¥ 183,163 ¥ 21,386,156 At September 30, 2023: Amortized Gross unrealized gains Gross unrealized losses Fair value (in millions) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 24,004,739 ¥ 6,628 ¥ 204,887 ¥ 23,806,480 Japanese prefectural and municipal bonds 1,448,520 529 13,053 1,435,996 Foreign government and official institution bonds 3,321,914 1,887 176,360 3,147,441 Corporate bonds 993,368 8,886 5,093 997,161 Residential mortgage-backed securities 1,190,027 630 335 1,190,322 Asset-backed securities 1,327,319 10,448 4,196 1,333,571 Other debt securities 469,145 1,610 8,947 461,808 Total ¥ 32,755,032 ¥ 30,618 ¥ 412,871 ¥ 32,372,779 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 15,278,373 ¥ 9,192 ¥ 125,726 ¥ 15,161,839 Japanese prefectural and municipal bonds 1,742,822 69 25,501 1,717,390 Corporate bonds 83,270 70 216 83,124 Residential mortgage-backed securities 4,785,680 — 333,444 4,452,236 Asset-backed securities 2,766,881 883 24,266 2,743,498 Total ¥ 24,657,026 ¥ 10,214 ¥ 509,153 ¥ 24,158,087 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, 2023 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 Fair value Fair value (in millions) Due in one year or less ¥ 2,855,090 ¥ 2,860,151 ¥ 21,295,450 Due from one year to five years 9,204,124 9,180,648 6,105,423 Due from five years to ten years 6,823,850 6,685,577 1,700,974 Due after ten years 5,773,962 5,431,711 3,270,932 Total ¥ 24,657,026 ¥ 24,158,087 ¥ 32,372,779 Realized Gains and Losses For the six months ended September 30, 2022 and 2023, gross realized gains on sales of Available-for-sale debt securities were ¥82,340 million and ¥79,165 million, respectively, and gross realized losses on sales of Available-for-sale debt securities were ¥72,520 million and ¥26,596 million, respectively. Impairment Losses on Investment Securities For the six months ended September 30, 2022, impairment losses on Available-for-sale debt securities of ¥299,478 million were included in Investment securities gains (losses)—net in the accompanying condensed consolidated statements of operations. These were mainly the impairment losses on the Available-for-sale debt securities held by MUFG Union Bank, which were reclassified as held for sale, and then sold on December 1, 2022. For the six months ended September 30, 2023, impairment losses on Available-for-sale debt securities, mainly comprised of corporate bonds, were included in Investment securities gains (losses)—net in the accompanying condensed consolidated statements of operations and were not material. For the six months ended September 30, 2022 and 2023, the MUFG Group’s Held-to-maturity debt securities were guaranteed by Japanese or U.S. government entities or agencies and had a long history of no credit losses or were rated investment grade. Based on the analysis performed, the MUFG Group has the intent and ability to hold these securities to maturity. Therefore, no credit losses were expected on these securities and no impairment loss has been recorded. 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, 2023 and September 30, 2023 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, 2023: 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 ¥ 7,644,337 ¥ 8,066 ¥ 2,105,210 ¥ 115,703 ¥ 9,749,547 ¥ 123,769 438 Japanese prefectural and municipal bonds 962,234 1,781 711,896 14,091 1,674,130 15,872 723 Foreign government and official institution bonds 858,970 18,677 1,436,798 89,695 2,295,768 108,372 118 Corporate bonds 331,411 1,800 249,088 1,177 580,499 2,977 256 Residential mortgage-backed securities 166,778 5 522,774 436 689,552 441 15 Asset-backed securities 310,388 4,170 39,806 194 350,194 4,364 32 Other debt securities 48,804 1,266 47,886 5,576 96,690 6,842 28 Total ¥ 10,322,922 ¥ 35,765 ¥ 5,113,458 ¥ 226,872 ¥ 15,436,380 ¥ 262,637 1,610 Less than 12 months 12 months or more Total At September 30, 2023: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥15,513,132 ¥ 11,509 ¥ 2,281,507 ¥ 193,378 ¥ 17,794,639 ¥ 204,887 465 Japanese prefectural and municipal bonds 632,087 2,471 547,689 10,582 1,179,776 13,053 618 Foreign government and official institution bonds 414,975 16,286 2,044,973 160,074 2,459,948 176,360 112 Corporate bonds 223,396 1,646 379,043 3,447 602,439 5,093 298 Residential mortgage-backed securities 50,483 2 310,171 333 360,654 335 10 Asset-backed securities 254,849 3,647 71,708 549 326,557 4,196 26 Other debt securities 342,014 2,186 58,531 6,761 400,545 8,947 88 Total ¥ 17,430,936 ¥ 37,747 ¥ 5,693,622 ¥ 375,124 ¥ 23,124,558 ¥ 412,871 1,617 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, Japanese prefectural and municipal bonds, Foreign government and official institution bonds As of September 30, 2023, 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, 2023 and no impairment loss has been recorded. Corporate bonds As of September 30, 2023, 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, 2023, 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, 2023 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, 2023, 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, 2023 and no impairment loss has been recorded. 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, 2022 and 2023. Six months ended 2022 2023 (in millions) Net gains (losses) recognized during the period (1) ¥ (203,007) ¥ 687,966 Less: Net gains (losses) recognized during the period on equity securities sold during the period (214) 19,195 Net unrealized gains (losses) recognized during the reporting period still held at the reporting date ¥ (202,793) ¥ 668,771 Note: (1) Included in Investment securities gains (losses)—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, 2023 and September 30, 2023. March 31, September 30, (in millions) Measurement alternative balance ¥ 381,928 ¥ 471,832 The related adjustments for these securities during the six months ended September 30, 2022 and 2023 were as follows: Six months ended 2022 2023 (in millions) Measurement alternative impairment losses (1)(4) ¥ (5,155) ¥ (8,187) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ (440) ¥ (1,567) Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ 5,090 ¥ 783 Notes: (1) Included in Investment securities gains (losses)—net. (2) Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer. (3) The MUFG Group applied measurement alternative 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, 2023 and September 30, 2023 were ¥20,151 million and ¥27,784 million, respectively. (5) The cumulative downward changes for observable prices at March 31, 2023 and September 30, 2023 were ¥1,393 million and ¥2,961 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2023 and September 30, 2023 were ¥59,069 million and ¥59,822 million, respectively.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	6 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Loans and Allowance for Credit Losses	LOANS AND ALLOWANCE FOR CREDIT LOSSES The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUAH, Bank of Ayudhya Public Company Limited and its consolidated subsidiaries (“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, 2023 for further information. However, for the fiscal year ended March 31, 2023, the MUAH segment is included in the Other segment in the respective tables, because its importance as a segment declined as a result of the sale of MUFG Union Bank and an internal reorganization within the MUFG Group. The reorganization involved the transfer of assets, including loans of ¥2,614,535 million from the MUAH segment to the Commercial segment on November 14, 2022. See Note 2 for further information. Total Outstanding Loans and Past Due Analysis The table below presents total outstanding loans and past due analysis by class at March 31, 2023 and September 30, 2023. Past Due At March 31, 2023: 1-3 months Greater Total Current Loans Total Past Due 90 Days and (in millions) Commercial Domestic ¥ 6,599 ¥ 12,485 ¥ 19,084 ¥ 55,519,315 ¥ 87,659 ¥ 55,626,058 ¥ 2,652 Foreign 8,818 33,203 42,021 41,268,228 879,423 42,189,672 12,158 Residential 32,514 11,496 44,010 12,830,845 — 12,874,855 3,342 Card 14,992 26,587 41,579 431,263 — 472,842 — Krungsri 188,802 136,627 325,429 7,457,206 — 7,782,635 — Other 14,241 20,235 34,476 1,375,934 — 1,410,410 — Total ¥ 265,966 ¥ 240,633 ¥ 506,599 ¥ 118,882,791 ¥ 967,082 ¥ 120,356,472 ¥ 18,152 Unearned income, unamortized premiums—net and deferred loan fees—net (401,012) Total ¥ 119,955,460 Past Due At September 30, 2023: 1-3 months Greater Total Current Loans Total Past Due 90 Days and Accruing (in millions) Commercial Domestic ¥ 5,741 ¥ 11,431 ¥ 17,172 ¥ 55,250,944 ¥ 57,876 ¥ 55,325,992 ¥ 2,510 Foreign 1,339 38,029 39,368 44,944,455 997,123 45,980,946 13,183 Residential 34,298 12,879 47,177 12,550,728 — 12,597,905 4,396 Card 15,815 27,762 43,577 434,805 — 478,382 — Krungsri 224,565 167,420 391,985 8,355,723 — 8,747,708 — Other 18,416 29,673 48,089 1,660,317 — 1,708,406 — Total ¥ 300,174 ¥ 287,194 ¥ 587,368 ¥ 123,196,972 ¥ 1,054,999 ¥ 124,839,339 ¥ 20,089 Unearned income, unamortized premiums—net and deferred loan fees—net (436,827) Total ¥ 124,402,512 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, MUAH, 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, 2023 for further information. The information on nonaccrual loans by class at March 31, 2023 and September 30, 2023 are shown below: Recorded Loan Balance March 31, 2023: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 401,836 ¥ 99,657 Foreign 246,675 65,242 Residential 47,910 3,962 Card 67,159 — Krungsri 211,705 3,286 Other 29,848 5 Total ¥ 1,005,133 ¥ 172,152 Recorded Loan Balance September 30, 2023: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 336,679 ¥ 103,914 Foreign 202,085 50,016 Residential 44,874 4,177 Card 70,093 — Krungsri 255,876 3,286 Other 33,791 9 Total ¥ 943,398 ¥ 161,402 Notes: (1) Nonaccrual loans in the above table do not include loans held for sale of ¥9,205 million and ¥14,384 million at March 31, 2023 and September 30, 2023, respectively. (2) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans’ effective interest rate, or the fair value of the collateral if the loan is a collateral-dependent loan. The following table shows information regarding recognized interest income on nonaccrual loans for the six months ended September 30, 2022 and 2023: September 30, 2022 (in millions) Commercial Domestic ¥ 10,033 Foreign 2,247 Residential 378 Card 9 MUAH 51 Krungsri 3,250 Other 2,084 Total ¥ 18,052 September 30, 2023 (in millions) Commercial Domestic ¥ 2,209 Foreign 3,534 Residential 276 Card 8 Krungsri 4,641 Other 1,549 Total ¥ 12,217 Troubled Debt Restructurings The following table summarizes the MUFG Group’s TDRs by class for the six months ended September 30, 2022: Six months ended September 30, 2022 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 ¥ 37,312 ¥ 37,312 ¥ 1,830 Foreign 17,057 17,057 — Residential (1)(3) 8,697 8,697 95 Card (2)(3) 11,408 10,934 1,410 MUAH (2)(3) 8,216 8,216 — Krungsri (2)(3) 48,899 48,899 1,827 Other (2) 7,638 7,638 1,202 Total ¥ 139,227 ¥ 138,753 ¥ 6,364 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUAH, Krungsri and Other segments include accrual and nonaccrual loans. (3) For the six months ended September 30, 2022, 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 MUAH segment. A modification of terms of a loan under a TDR mainly involves: (i) a reduction in the stated interest rate applicable to the loan, (ii) an extension of the stated maturity date of the loan, (iii) a partial forgiveness of the principal of the loan, or (iv) a combination of all of these. The amount of pre-modification 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, 2022 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, MUAH, Krungsri and Other segments, the TDRs in the above tables represent nonaccrual and accruing loans, and the defaulted loans in the above table represent nonaccrual and accruing loans that became past due one month or more within the Card segment, 60 days or more within the MUAH 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 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. Loan Modifications The following table summarizes the MUFG Group’s loan modifications that were made to borrowers experiencing financial difficulty by class for the six months ended September 30, 2023: Six months ended September 30, 2023: Loan Modifications Made to Borrowers Experiencing Financial Difficulty Loans Modified within 12 months of Subsequent Default Amortized Cost Basis at the Period End Percentage of Total Class of Loans Amortized Cost Basis at the Period End (in millions, except percentages) Commercial (1) Domestic Interest rate reduction ¥ 2,909 0.01 % ¥ — Term extension 146,968 0.27 2,676 Combination of interest rate reduction and term extension 4,774 0.01 — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Foreign Interest rate reduction ¥ — — % ¥ — Term extension 101,054 0.22 — Combination of interest rate reduction and term extension — — — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Residential (1) Interest rate reduction ¥ — — % ¥ — Term extension 8,491 0.07 60 Combination of interest rate reduction and term extension — — — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Card (2) Interest rate reduction ¥ — — % ¥ — Term extension — — — Combination of interest rate reduction and term extension 12,480 2.61 1,472 Combination of term extension and principal forgiveness 121 0.03 1 All other modifications and combinations — — — Krungsri (2) Interest rate reduction ¥ 389 0.00 % ¥ 113 Term extension 193,354 2.21 1,854 Combination of interest rate reduction and term extension 2,134 0.02 122 Combination of term extension and principal forgiveness 464 0.01 834 All other modifications and combinations 884 0.01 142 Other (2) Interest rate reduction ¥ 250 0.01 % ¥ 185 Term extension 1,569 0.09 290 Combination of interest rate reduction and term extension 149 0.01 — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Notes: (1) The modified loans for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) The modified loans for the Card, Krungsri and Other segments include accrual and nonaccrual loans. Loan modifications made to borrowers experiencing financial difficulty 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 loans on the period-ended amortized cost basis is immaterial, and the vast majority of nonaccrual modified loans have subsequently defaulted. Loans that had a payment default during the period and had been modified to borrowers experiencing financial difficulty at the time of the modification within the previous 12 months preceding the payment default 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, Krungsri and Other segments, loan modifications made to borrowers experiencing financial difficulty in the above tables represent nonaccrual and accruing loans, and the defaulted loans in the above table represent nonaccrual and accruing loans that became past due one month or more within the Card segment, and six months or more within the Krungsri segment. Historical payment defaults are one of the factors considered when determining the allowance for credit losses, and are factored into projecting future cash flows for segments other than the Card segment, for which such default information is considered when using collectively-assessed allowance methodology. The following table provides the financial effect of the modifications made to borrowers experiencing financial difficulty by class for the six months ended September 30, 2023: Six months ended September 30, 2023: Financial Effect Commercial Domestic Interest rate reduction Reduced weighted-average contractual interest rate by 0.06% Term extension Added a weighted-average 0.8 years to the life of loans. Foreign Term extension Added a weighted-average 0.5 years to the life of loans. Residential Term extension Added a weighted-average 1.3 years to the life of loans. Card Interest rate reduction Reduced weighted-average contractual interest rate by 15.24%. Term extension Added a weighted-average 3.0 years to the life of loans. Principal forgiveness Reduced the principal balance of the loans by ¥404 million. Krungsri Interest rate reduction Reduced weighted-average contractual interest rate by 1.24%. Term extension Added a weighted-average 1.7 years to the life of loans. Principal forgiveness Reduced the principal balance of the loans by ¥484 million. Other Interest rate reduction Reduced weighted-average contractual interest rate by 3.40%. Term extension Added a weighted-average 3.0 years to the life of loans. The following table provides the performance of loans that have been modified in the last 12 months to borrowers experiencing financial difficulty by class for the six months ended September 30, 2023: Six months ended September 30, 2023: Payment Status (Amortized Cost Basis at the Period End) Current 1-3 months Past Due Greater Than 3 months Past Due (in millions) Commercial (1) Domestic ¥ 266,915 ¥ 305 ¥ 470 Foreign 108,618 — — Residential (1) 16,094 948 214 Card (2) 16,816 4,270 1,973 Krungsri (2) 298,694 10,727 10,783 Other (2) 4,068 591 188 Total ¥ 711,205 ¥ 16,841 ¥ 13,628 Notes: (1) The modified loans for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) The modified loans for the Card, Krungsri and Other segments include accrual and nonaccrual loans. The MUFG Group provided commitments to extend credit to borrowers experiencing financial difficulty that were granted modifications in the form of principal forgiveness, an interest rate reduction, or a term extension for the six months ended September 30, 2023. The amount of such commitments was ¥19,982 million at September 30, 2023. See Note 24 to the consolidated financial statements for the fiscal year ended March 31, 2023 for further discussion of commitments to extend credit. See Note 13 for further information on balance of commitments. Credit Quality Indicator Credit quality indicators of loans and fiscal year of origination by class at March 31, 2023 are shown below: Term Loans Revolving Revolving Total (1) At March 31, 2023: 2022 2021 2020 2019 2018 Prior (in millions) Commercial: ¥ 32,957,651 ¥ 10,100,587 ¥ 8,626,319 ¥ 5,653,421 ¥ 4,385,807 ¥ 9,366,641 ¥ 25,743,172 ¥ 15,050 ¥ 96,848,648 Domestic 20,132,474 6,099,692 6,675,895 4,002,329 3,214,528 7,406,590 8,006,891 — 55,538,399 Normal 19,867,845 5,957,659 6,472,135 3,823,755 3,126,146 6,722,981 7,722,379 — 53,692,900 Close Watch 222,202 124,499 172,270 114,534 74,635 567,514 262,686 — 1,538,340 Likely to become Bankrupt or Legally/Virtually Bankrupt 42,427 17,534 31,490 64,040 13,747 116,095 21,826 — 307,159 Foreign 12,825,177 4,000,895 1,950,424 1,651,092 1,171,279 1,960,051 17,736,281 15,050 41,310,249 Normal 12,508,547 3,931,278 1,857,934 1,577,120 1,083,934 1,824,977 17,540,822 15,050 40,339,662 Close Watch 262,388 34,656 60,637 50,210 71,966 79,450 174,436 — 733,743 Likely to become Bankrupt or Legally/Virtually Bankrupt 54,242 34,961 31,853 23,762 15,379 55,624 21,023 — 236,844 Residential ¥ 688,000 ¥ 747,161 ¥ 607,237 ¥ 919,359 ¥ 811,469 ¥ 9,077,669 ¥ 23,960 ¥ — ¥ 12,874,855 Accrual 687,800 747,121 607,047 918,781 810,933 9,034,589 22,093 — 12,828,364 Nonaccrual 200 40 190 578 536 43,080 1,867 — 46,491 Card ¥ 12 ¥ 147 ¥ 240 ¥ 239 ¥ 181 ¥ 587 ¥ 403,687 ¥ 67,749 ¥ 472,842 Accrual 1 7 10 8 9 37 391,237 14,374 405,683 Nonaccrual 11 140 230 231 172 550 12,450 53,375 67,159 Krungsri ¥ 1,824,628 ¥ 1,046,959 ¥ 654,933 ¥ 692,616 ¥ 515,731 ¥ 605,053 ¥ 2,427,923 ¥ 14,792 ¥ 7,782,635 Performing 1,689,034 956,470 570,865 553,616 406,258 459,322 2,292,418 — 6,927,983 Under-Performing 108,770 66,555 67,504 111,435 85,928 98,103 104,652 — 642,947 Non-Performing 26,824 23,934 16,564 27,565 23,545 47,628 30,853 14,792 211,705 Other ¥ 551,560 ¥ 190,786 ¥ 108,148 ¥ 48,867 ¥ 19,875 ¥ 80,252 ¥ 410,922 ¥ — ¥ 1,410,410 Accrual 549,274 187,638 106,522 47,235 17,832 75,726 396,334 — 1,380,561 Nonaccrual 2,286 3,148 1,626 1,632 2,043 4,526 14,588 — 29,849 Credit quality indicators of loans and fiscal year of origination by class at September 30, 2023, and gross charge-offs for the six months ended September 30, 2023 are shown below: Term Loans Revolving Revolving Total (1) At September 30, 2023: 2023 2022 2021 2020 2019 Prior (in millions) Commercial: ¥ 24,683,463 ¥ 17,014,732 ¥ 8,183,201 ¥ 7,037,786 ¥ 4,794,778 ¥ 11,556,449 ¥ 26,933,190 ¥ 48,340 ¥ 100,251,939 Domestic 14,475,541 8,962,771 5,386,826 5,862,545 3,592,584 9,224,351 7,763,498 — 55,268,116 Normal 14,320,810 8,821,506 5,254,183 5,694,307 3,446,184 8,559,902 7,518,069 — 53,614,961 Close Watch 146,705 126,472 122,444 140,338 80,540 551,639 224,428 — 1,392,566 Likely to become Bankrupt or Legally/Virtually Bankrupt 8,026 14,793 10,199 27,900 65,860 112,810 21,001 — 260,589 Gross charge-offs 1,896 22,519 1,213 918 583 460 865 — 28,454 Foreign 10,207,922 8,051,961 2,796,375 1,175,241 1,202,194 2,332,098 19,169,692 48,340 44,983,823 Normal 9,976,734 7,886,252 2,769,053 1,131,884 1,070,727 2,144,663 18,851,641 48,340 43,879,294 Close Watch 179,305 145,486 27,233 25,793 113,147 122,666 303,862 — 917,492 Likely to become Bankrupt or Legally/Virtually Bankrupt 51,883 20,223 89 17,564 18,320 64,769 14,189 — 187,037 Gross charge-offs 176 330 959 401 149 — 6,474 — 8,489 Residential ¥ 244,078 ¥ 673,841 ¥ 731,671 ¥ 591,262 ¥ 892,586 ¥ 9,442,305 ¥ 22,162 ¥ — ¥ 12,597,905 Accrual 244,072 673,649 731,530 591,025 891,988 9,401,590 20,257 — 12,554,111 Nonaccrual 6 192 141 237 598 40,715 1,905 — 43,794 Gross charge-offs — — — 6 18 435 — — 459 Card ¥ — ¥ 82 ¥ 194 ¥ 266 ¥ 237 ¥ 709 ¥ 406,199 ¥ 70,695 ¥ 478,382 Accrual — 4 6 8 7 40 393,455 14,769 408,289 Nonaccrual — 78 188 258 230 669 12,744 55,926 70,093 Gross charge-offs 6 17 62 51 49 82 4,047 5,844 10,158 Krungsri ¥ 1,193,301 ¥ 1,728,989 ¥ 925,488 ¥ 560,513 ¥ 574,963 ¥ 964,264 ¥ 2,784,735 ¥ 15,455 ¥ 8,747,708 Performing 1,130,458 1,534,215 822,929 478,441 451,429 726,205 2,616,328 — 7,760,005 Under-Performing 52,188 135,884 72,846 65,469 96,467 172,772 136,201 — 731,827 Non-Performing 10,655 58,890 29,713 16,603 27,067 65,287 32,206 15,455 255,876 Gross charge-offs 358 11,594 11,552 6,355 6,036 9,473 14,649 — 60,017 Other ¥ 461,916 ¥ 381,708 ¥ 158,192 ¥ 82,994 ¥ 40,010 ¥ 117,397 ¥ 466,189 ¥ — ¥ 1,708,406 Accrual 461,455 375,823 155,147 81,668 38,720 110,971 450,831 — 1,674,615 Nonaccrual 461 5,885 3,045 1,326 1,290 6,426 15,358 — 33,791 Gross charge-offs 228 5,976 3,602 1,082 557 1,571 2,913 — 15,929 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. 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, 2023. For the Commercial, Residential and Card segments, credit quality indicators at March 31, 2023 and September 30, 2023 are based on information as of March 31, 2023 and September 30, 2023, respectively. For the Krungsri and Other segments, credit quality indicators at March 31, 2023 and September 30, 2023 are generally based on information as of December 31, 2022 and June 30, 2023, respectively. Allowance for Credit Losses Effective as of April 1, 2023, the MUFG Group adopted new guidance on measurement of credit losses on financial instruments for loan modifications made to borrowers experiencing financial difficulty. Under the new guidance, the MUFG Group adopts a discounted cash flow methodology that utilizes a discount rate based on the post-modification contractual interest rate, other than those in the Card segment, for which the allowance is measured using collectively-assessed allowance methodology. See Note 1 for further information. Changes in the allowance for credit losses of loans by portfolio segment for the six months ended September 30, 2022 and 2023 are shown below: Six months ended September 30, 2022: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 934,086 ¥ 69,887 ¥ 40,768 ¥ 30,365 ¥ 322,386 ¥ 73,209 ¥ 1,470,701 Provision for (reversal of) credit losses (164,085) (5,867) 10,326 4,792 39,380 17,669 (97,785) Charge-offs 130,524 110 8,867 10,083 38,792 22,991 211,367 Recoveries collected 6,096 11 431 2,270 12,028 8,989 29,825 Net charge-offs 124,428 99 8,436 7,813 26,764 14,002 181,542 Other (1) 12,307 — — 3,191 40,167 10,198 65,863 Balance at end of period ¥ 657,880 ¥ 63,921 ¥ 42,658 ¥ 30,535 ¥ 375,169 ¥ 87,074 ¥ 1,257,237 Six months ended September 30, 2023: Commercial Residential Card Krungsri Other (2) Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 719,589 ¥ 59,747 ¥ 42,469 ¥ 358,031 ¥ 93,062 ¥ 1,272,898 Provision for (reversal of) credit losses (17,974) 433 10,255 47,303 21,755 61,772 Charge-offs 36,943 459 10,158 60,017 15,929 123,506 Recoveries collected 9,720 2 393 13,959 8,491 32,565 Net charge-offs 27,223 457 9,765 46,058 7,438 90,941 Other (1)(3) 1,580 — (7,666) 45,955 11,159 51,028 Balance at end of period ¥ 675,972 ¥ 59,723 ¥ 35,293 ¥ 405,231 ¥ 118,538 ¥ 1,294,757 Notes: (1) Other is principally comprised of gains or losses from foreign exchange translation. (2) For the six months ended September 30, 2023, the beginning balance and the ending balance of the Other segment in the above table include the allowance for credit losses of ¥3,428 million and ¥1,151 million, respectively, which were previously included in the MUAH segment. (3) For the six months ended September 30, 2023, Other includes the change in accounting principle related to the recognition and measurement of TDRs which was adopted on April 1, 2023. As a result of accumulating the amounts included in each segment amount, the Total includes negative of ¥18,869 million. The MUFG Group sold ¥1,295 billion and ¥1,206 billion of loans within the Commercial segment during the six months ended September 30, 2022 and 2023, respectively. The MUFG Group sold ¥337 billion of loans within the MUAH segment during the six months ended September 30, 2022. 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. For the Commercial, Krungsri and Other segments, collateral relating to these loans was 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 ¥1,794,983 million and ¥1,944,234 million as of March 31, 2023 and September 30, 2023, respectively, and were primarily comprised of receivables relating to the credit 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 operations. The receivables relating to the credit card business included ¥6,849 million of past due receivables (1-3 months past due receivables of ¥3,173 million and greater than 3 months past due receivables of ¥3,676 million) as of March 31, 2023, and ¥7,439 million of past due receivables (1-3 months past due receivables of ¥3,405 million and greater than 3 months past due receivables of ¥4,034 million) as of September 30, 2023, respectively. The credit quality for these receivables is primarily evaluated based on the extent of delinquency. 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, 2022 and 2023 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 ¥500,506 million and ¥629,985 million as of March 31, 2023 and September 30, 2023, 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, 2023
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, 2022 and 2023: Six months ended 2022 2023 (in millions) Balance at beginning of period Goodwill (1)(3) ¥ 1,118,889 ¥ 889,524 Accumulated impairment losses (1)(3) (723,492) (592,752) Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank (2) (91,786) — 303,611 296,772 Goodwill acquired during the six months (4) — 59,127 Foreign currency translation adjustments and other 54,093 22,424 Balance at end of period Goodwill 1,172,982 971,075 Accumulated impairment losses (723,492) (592,752) Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank (2) ¥ (108,468) ¥ — ¥ 341,022 ¥ 378,323 Notes: (1) Goodwill originally recognized of ¥1,900,019 million, which has been fully impaired before April 1, 2022, 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 condensed consolidated balance sheets at September 30, 2022. See Note 2 for more information. (3) For the balance at April 1, 2023, the Goodwill and Accumulated impairment losses in the above table exclude the goodwill and accumulated impairment losses previously recorded for MUFG Union Bank, which was sold during the fiscal year ended March 31, 2023. See Note 2 for further information. (4) Goodwill acquired during the six months ended September 30, 2023 mainly relates to the acquisition of business in the Global Commercial Banking Business Group, including the acquisition of HC Philippines (See Note 2). Other Intangible Assets The table below presents the net carrying amount by major class of other intangible assets at March 31, 2023 and September 30, 2023: March 31, September 30, (in millions) Intangible assets subject to amortization: Software ¥ 833,297 ¥ 887,780 Customer relationships 232,911 241,517 Core deposit intangibles 50,176 50,862 Trade names 38,771 39,647 Other 11,110 13,215 Total 1,166,265 1,233,021 Intangible assets not subject to amortization: Other 7,958 7,873 Total ¥ 1,174,223 ¥ 1,240,894

Lease Transactions

Lease Transactions	6 Months Ended
	Sep. 30, 2023
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 of various types of data processing equipment, office equipment and transportation equipment. Sales type and direct financing leases are presented in loans. In certain cases, the MUFG Group requests lessees to deposit an amount nearly, or equal to, the 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, 2022 and September 30, 2023: September 30, September 30, (in millions) Sales type and direct financing leases: Finance income on net investment ¥ 61,812 ¥ 68,780 Operating leases: Lease income 1,799 3,937 Total ¥ 63,611 ¥ 72,717 Finance income on net investment is included in Interest income—Loans, including fees in the condensed consolidated statements of operations. Lease income from operating lease transactions is included in Other non-interest income in the condensed consolidated statements of operations.

Pledged Assets and Collateral

Pledged Assets and Collateral	6 Months Ended
	Sep. 30, 2023
Financial Instruments Pledged as Collateral [Abstract]
Pledged Assets and Collateral	PLEDGED ASSETS AND COLLATERAL At September 30, 2023, assets mortgaged, pledged, or otherwise subject to lien were as follows: September 30, 2023 (in millions) Trading account securities ¥ 7,820,667 Investment securities 23,430,643 Loans 12,197,635 Other 22,929 Total ¥ 43,471,874 The above pledged assets were classified by type of liabilities to which they related as follows: September 30, 2023 (in millions) Deposits ¥ 14,911 Payables under repurchase agreements and securities lending transactions 20,906,911 Other short-term borrowings and long-term debt 22,473,103 Other 76,949 Total ¥ 43,471,874 At September 30, 2023, certain investment securities, principally Japanese national government and Japanese government agency bonds, loans and other assets with a combined carrying value of ¥21,191,472 million were pledged for acting as a collection agent of public funds, for settlement of exchange at the Bank of Japan and Japanese Banks’ Payment Clearing Network, for derivative transactions and for certain other purposes. The MUFG Group engages in on-balance 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, 2023 and September 30, 2023, the cash collateral pledged for derivative transactions, which is included in Other assets, was ¥2,585,837 million and ¥3,569,638 million, respectively, and the cash collateral received for derivative transactions, which is included in Other liabilities, was ¥1,318,338 million and ¥1,561,905 million, respectively.

Severance Indemnities and Pensi

Severance Indemnities and Pension Plans	6 Months Ended
	Sep. 30, 2023
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, 2022 and 2023: Six months ended September 30, Domestic subsidiaries Foreign offices and subsidiaries 2022 2023 2022 2023 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 ¥ 20,580 ¥ 17,788 ¥ 8,281 ¥ 56 ¥ 6,141 ¥ 30 Interest cost on projected benefit obligation 7,131 10,288 7,667 340 4,345 594 Expected return on plan assets (42,328) (41,218) (18,381) (1,338) (5,574) (732) Amortization of net actuarial loss (gain) 346 925 3,896 (77) 837 584 Amortization of prior service cost (650) (973) (1,607) (212) (435) (208) Loss (gain) on settlements and curtailment (2,121) (6,393) — — 974 — Net periodic benefit cost (income) ¥ (17,042) ¥ (19,583) ¥ (144) ¥ (1,231) ¥ 6,288 ¥ 268

Offsetting of Derivatives, Repu

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions	6 Months Ended
	Sep. 30, 2023
Offsetting [Abstract]
Offsetting of Derivatives Repurchase Agreements and Securities Lending Disclosure	OFFSETTING OF DERIVATIVES, REPURCHASE AGREEMENTS, AND SECURITIES LENDING TRANSACTIONS The following tables present, as of March 31, 2023 and September 30, 2023, 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 set off 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, 2023: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 12,911 ¥ — ¥ 12,911 ¥ (9,902) ¥ (690) ¥ 2,319 Receivables under resale agreements 16,152 (2,093) 14,059 (13,391) (32) 636 Receivables under securities borrowing transactions 4,630 (74) 4,556 (4,478) — 78 Total ¥ 33,693 ¥ (2,167) ¥ 31,526 ¥ (27,771) ¥ (722) ¥ 3,033 Financial liabilities: Derivative liabilities ¥ 13,833 ¥ — ¥ 13,833 ¥ (9,668) ¥ (1,489) ¥ 2,676 Payables under repurchase agreements 42,172 (2,040) 40,132 (39,232) (76) 824 Payables under securities lending transactions 1,212 (74) 1,138 (1,108) (18) 12 Obligations to return securities received as collateral 6,892 — 6,892 (1,975) — 4,917 Total ¥ 64,109 ¥ (2,114) ¥ 61,995 ¥ (51,983) ¥ (1,583) ¥ 8,429 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 September 30, 2023: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 18,554 ¥ — ¥ 18,554 ¥ (14,849) ¥ (1,100) ¥ 2,605 Receivables under resale agreements 19,029 (2,659) 16,370 (15,670) (9) 691 Receivables under securities borrowing transactions 5,166 (81) 5,085 (4,811) — 274 Total ¥ 42,749 ¥ (2,740) ¥ 40,009 ¥ (35,330) ¥ (1,109) ¥ 3,570 Financial liabilities: Derivative liabilities ¥ 20,105 ¥ — ¥ 20,105 ¥ (14,364) ¥ (2,404) ¥ 3,337 Payables under repurchase agreements 35,529 (2,569) 32,960 (31,587) (124) 1,249 Payables under securities lending transactions 1,098 (81) 1,017 (986) (11) 20 Obligations to return securities received as collateral 6,895 — 6,895 (1,437) — 5,458 Total ¥ 63,627 ¥ (2,650) ¥ 60,977 ¥ (48,374) ¥ (2,539) ¥ 10,064

Repurchase Agreements and Secur

Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings	6 Months Ended
	Sep. 30, 2023
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, 2023 and September 30, 2023. 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, 2023 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 8,593 ¥ 23,546 ¥ 8,393 ¥ 1,640 ¥ 42,172 Payables under securities lending transactions 947 191 5 69 1,212 Obligations to return securities received as collateral 5,516 642 404 330 6,892 Total ¥ 15,056 ¥ 24,379 ¥ 8,802 ¥ 2,039 ¥ 50,276 September 30, 2023 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 11,525 ¥ 12,729 ¥ 7,680 ¥ 3,595 ¥ 35,529 Payables under securities lending transactions 1,015 — 6 77 1,098 Obligations to return securities received as collateral 6,233 256 127 279 6,895 Total ¥ 18,773 ¥ 12,985 ¥ 7,813 ¥ 3,951 ¥ 43,522 Secured borrowing by the class of collateral pledged at March 31, 2023 and September 30, 2023 was as follows: March 31, 2023 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 ¥ 13,280 ¥ 577 ¥ 3,956 ¥ 17,813 Foreign government and official institution bonds 17,618 9 1,122 18,749 Corporate bonds 657 70 400 1,127 Residential mortgage-backed securities 9,650 — — 9,650 Other debt securities 552 — 46 598 Marketable equity securities 367 556 1,368 2,291 Other 48 — — 48 Total ¥ 42,172 ¥ 1,212 ¥ 6,892 ¥ 50,276 September 30, 2023 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 ¥ 12,686 ¥ 254 ¥ 4,013 ¥ 16,953 Foreign government and official institution bonds 13,357 7 965 14,329 Corporate bonds 908 77 354 1,339 Residential mortgage-backed securities 7,563 — — 7,563 Other debt securities 454 — 43 497 Marketable equity securities 534 735 1,520 2,789 Other 27 25 — 52 Total ¥ 35,529 ¥ 1,098 ¥ 6,895 ¥ 43,522

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Sep. 30, 2023
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 other comprehensive income (loss) (“Accumulated OCI”), net of tax and net of noncontrolling interests, for the six months ended September 30, 2022 and 2023: Six months ended 2022 2023 (in millions) Accumulated other comprehensive income (loss), net of taxes: Net unrealized losses on investment securities: Balance at beginning of period ¥ (674,230) ¥ (883,466) Net change during the period (218,267) (157,542) Balance at end of period ¥ (892,497) ¥ (1,041,008) Net debt valuation adjustments: Balance at beginning of period ¥ (14,538) ¥ 3,268 Net change during the period 45,485 (22,260) Balance at end of period ¥ 30,947 ¥ (18,992) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Balance at beginning of period ¥ 5,969 ¥ 594 Net change during the period (21,686) 13 Balance at end of period ¥ (15,717) ¥ 607 Defined benefit plans: Balance at beginning of period ¥ 29,124 ¥ 8,304 Net change during the period (16,948) 48,926 Balance at end of period ¥ 12,176 ¥ 57,230 Foreign currency translation adjustments: Balance at beginning of period ¥ 880,708 ¥ 1,715,492 Net change during the period 1,409,554 971,678 Balance at end of period ¥ 2,290,262 ¥ 2,687,170 Balance at end of period ¥ 1,425,171 ¥ 1,685,007 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, 2022 and 2023: Six months ended September 30, 2022 2023 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 losses on investment securities ¥ (534,655) ¥ 132,963 ¥ (401,692) ¥ (147,389) ¥ 23,204 ¥ (124,185) Reclassification adjustment for losses (gains) included in net income (loss) before attribution of noncontrolling interests 296,064 (88,081) 207,983 (51,965) 14,020 (37,945) Net change (238,591) 44,882 (193,709) (199,354) 37,224 (162,130) Net unrealized gains (losses) on investment securities attributable to noncontrolling interests 24,558 (4,588) Net unrealized losses on investment securities attributable to Mitsubishi UFJ Financial Group (218,267) (157,542) Net debt valuation adjustments: Net debt valuation adjustments 65,470 (20,047) 45,423 (32,387) 9,917 (22,470) Reclassification adjustment for losses included in net income (loss) before attribution of noncontrolling interests 89 (27) 62 302 (92) 210 Net change 65,559 (20,074) 45,485 (32,085) 9,825 (22,260) Net debt valuation adjustments attributable to noncontrolling interests — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group 45,485 (22,260) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains (losses) on derivatives qualifying for cash flow hedges (22,892) 6,571 (16,321) 3,029 (599) 2,430 Reclassification adjustment for gains included in net income (loss) before attribution of noncontrolling interests (6,701) 1,662 (5,039) (3,013) 598 (2,415) Net change (29,593) 8,233 (21,360) 16 (1) 15 Net unrealized gains on derivatives qualifying for cash flow hedges attributable to noncontrolling interests 326 2 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group (21,686) 13 Defined benefit plans: Defined benefit plans (23,354) 6,682 (16,672) 75,036 (22,992) 52,044 Reclassification adjustment for gains included in net income (loss) before attribution of noncontrolling interests (443) 250 (193) (4,612) 1,533 (3,079) Net change (23,797) 6,932 (16,865) 70,424 (21,459) 48,965 Defined benefit plans attributable to noncontrolling interests 83 39 Defined benefit plans attributable to Mitsubishi UFJ Financial Group (16,948) 48,926 Foreign currency translation adjustments: Foreign currency translation adjustments 1,654,830 (196,704) 1,458,126 1,200,624 (146,735) 1,053,889 Reclassification adjustment for gains included in net income (loss) before attribution of noncontrolling interests (12,257) 3,753 (8,504) (4,231) 1,296 (2,935) Net change 1,642,573 (192,951) 1,449,622 1,196,393 (145,439) 1,050,954 Foreign currency translation adjustments attributable to noncontrolling interests 40,068 79,276 Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group 1,409,554 971,678 Other comprehensive income attributable to Mitsubishi UFJ Financial Group ¥ 1,198,138 ¥ 840,815 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 operations for the six months ended September 30, 2022 and 2023: Six months ended 2022 2023 Details of Accumulated OCI components Amount reclassified out of Accumulated OCI Line items in the consolidated statements of operations (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale debt securities ¥ (9,738) ¥ (52,655) Investment securities gains (losses)—net Impairment losses on investment securities 299,281 2 Investment securities gains (losses)—net Other 6,521 688 296,064 (51,965) Total before tax (88,081) 14,020 Income tax expense (benefit) ¥ 207,983 ¥ (37,945) Net of tax Net debt valuation adjustments ¥ 89 ¥ 302 Equity in earnings of equity method investees—net 89 302 Total before tax (27) (92) Income tax expense (benefit) ¥ 62 ¥ 210 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ (5,173) ¥ — Interest income on Loans, including fees Foreign exchange contracts (1,528) (3,013) Interest expense on Long-term debt or Foreign exchange losses—net (6,701) (3,013) Total before tax 1,662 598 Income tax expense (benefit) ¥ (5,039) ¥ (2,415) Net of tax Defined benefit plans Net actuarial loss (1) ¥ 4,165 ¥ 2,346 Other non-interest expenses Prior service cost (1) (2,469) (1,616) Other non-interest expenses Gain on settlements and curtailment, and other (1) (2,139) (5,342) Other non-interest expenses (443) (4,612) Total before tax 250 1,533 Income tax expense (benefit) ¥ (193) ¥ (3,079) Net of tax Foreign currency translation adjustments ¥ (12,257) ¥ (4,231) Other non-interest income (12,257) (4,231) Total before tax 3,753 1,296 Income tax expense (benefit) ¥ (8,504) ¥ (2,935) Net of tax Total reclassifications for the period ¥ 276,752 ¥ (63,519) Total before tax (82,443) 17,355 Income tax expense (benefit) ¥ 194,309 ¥ (46,164) 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, 2023
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, 2023 for a further discussion of the MUFG Group’s use of derivative instruments. During the six months ended September 30, 2023, 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. Notional Amounts of Derivative Contracts The following table summarizes the notional amounts of derivative contracts at March 31, 2023 and September 30, 2023: Notional amounts (1) March 31, September 30, 2023 (in trillions) Interest rate contracts ¥ 1,625.6 ¥ 1,742.9 Foreign exchange contracts 307.4 322.4 Equity contracts 5.3 6.0 Commodity contracts 0.1 0.2 Credit derivatives 11.5 6.7 Other 3.2 3.3 Total ¥ 1,953.1 ¥ 2,081.5 Note: (1) Includes both written and purchased positions. 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, 2023 and September 30, 2023: Fair value of derivative instruments March 31, 2023 (1)(5) September 30, 2023 (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) (in billions) Derivative assets: Interest rate contracts ¥ 7,445 ¥ — ¥ 7,445 ¥ 11,151 ¥ — ¥ 11,151 Foreign exchange contracts 5,276 5 5,281 7,176 8 7,184 Equity contracts 90 — 90 150 — 150 Commodity contracts 10 — 10 19 — 19 Credit derivatives 80 — 80 50 — 50 Other (6) 5 — 5 — — — Total derivative assets ¥ 12,906 ¥ 5 ¥ 12,911 ¥ 18,546 ¥ 8 ¥ 18,554 Derivative liabilities: Interest rate contracts ¥ 8,697 ¥ — ¥ 8,697 ¥ 12,809 ¥ — ¥ 12,809 Foreign exchange contracts 5,018 — 5,018 7,202 — 7,202 Equity contracts 128 — 128 125 — 125 Commodity contracts 10 — 10 19 — 19 Credit derivatives 90 — 90 72 — 72 Other (6) (110) — (110) (122) — (122) Total derivative liabilities ¥ 13,833 ¥ — ¥ 13,833 ¥ 20,105 ¥ — ¥ 20,105 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, 2023. (6) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, Deposits and Long-term debt. Impact of Derivatives on the Condensed Consolidated Statements of Operations The following table provides more detailed information regarding the derivative-related impact on the accompanying condensed consolidated statements of operations for the six months ended September 30, 2022 and 2023: 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, 2022: Interest rate contracts ¥ — ¥ 64 ¥ 64 Foreign exchange contracts (168) — (168) Equity contracts — (24) (24) Credit derivatives — (2) (2) Other (1) (8) 23 15 Total ¥ (176) ¥ 61 ¥ (115) Six months ended September 30, 2023: Interest rate contracts ¥ — ¥ (219) ¥ (219) Foreign exchange contracts (385) — (385) Equity contracts — (268) (268) Credit derivatives — (20) (20) Other (1) (8) (32) (40) Total ¥ (393) ¥ (539) ¥ (932) 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, 2023 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, 2023 and September 30, 2023: Protection sold Maximum potential/Notional amount by expiration period Fair value At March 31, 2023: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 616,504 ¥ 2,222,393 ¥ 529,796 ¥ 3,368,693 ¥ (30,117) Non-investment grade 163,982 313,135 48,177 525,294 13,477 Total 780,486 2,535,528 577,973 3,893,987 (16,640) Index and basket credit default swaps : Investment grade (2) — 217,259 1,596 218,855 (1,266) Non-investment grade 37,359 599,638 6,200 643,197 (7,121) Not rated — 435,452 3,192 438,644 (3,329) Total 37,359 1,252,349 10,988 1,300,696 (11,716) Total credit default swaps sold ¥ 817,845 ¥ 3,787,877 ¥ 588,961 ¥ 5,194,683 ¥ (28,356) Protection sold Maximum potential/Notional amount by expiration period Fair value At September 30, 2023: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 321,667 ¥ 925,277 ¥ 327,235 ¥ 1,574,179 ¥ (13,488) Non-investment grade 103,022 188,539 21,298 312,859 3,810 Total 424,689 1,113,816 348,533 1,887,038 (9,678) Index and basket credit default swaps : Investment grade (2) 56,000 905,146 18,281 979,427 (9,869) Non-investment grade — — — — — Not rated 2,876 — — 2,876 (12) Total 58,876 905,146 18,281 982,303 (9,881) Total credit default swaps sold ¥ 483,565 ¥ 2,018,962 ¥ 366,814 ¥ 2,869,341 ¥ (19,559) 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. 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 ¥27 billion and ¥4,880 billion, respectively, at March 31, 2023, and approximately ¥17 billion and ¥2,577 billion, respectively, at September 30, 2023. 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, 2023 and September 30, 2023 was approximately ¥0.8 trillion and ¥0.9 trillion, respectively, for which the MUFG Group has posted collateral of approximately ¥222 billion and ¥338 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 ¥70 billion and ¥116 billion, respectively, as of March 31, 2023 and ¥72 billion and ¥165 billion, respectively, as of September 30, 2023.

Obligations Under Guarantees an

Obligations Under Guarantees and Other Off-balance Sheet Instruments	6 Months Ended
	Sep. 30, 2023
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, 2023. The table below presents the contractual or notional amounts of such guarantees at March 31, 2023 and September 30, 2023: March 31, September 30, 2023 (in billions) Standby letters of credit and financial guarantees ¥ 4,975 ¥ 5,087 Performance guarantees 4,179 4,697 Derivative instruments (1)(2) 48,363 53,415 Liabilities of trust accounts 17,139 21,703 Other 85 76 Total ¥ 74,741 ¥ 84,978 Notes: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation. (2) Derivative instruments that are deemed to be included within the definition of guarantees as prescribed in the guidance on guarantees include certain written options and credit default swaps. Performance Risk The MUFG Group monitors performance risk of its guarantees using the same credit rating system utilized for estimating probabilities of default with its loan portfolio. The MUFG Group’s credit rating system is consistent with both the method of evaluating credit risk under Basel III and those of third-party credit rating agencies. On certain underlying referenced credits or entities, ratings are not available. Such referenced credits are included in the “Not rated” category in the following tables. Presented in the tables below is the maximum potential amount of future payments classified based upon internal credit ratings as of March 31, 2023 and September 30, 2023. 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, 2023: 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 ¥ 4,975 ¥ 4,819 ¥ 78 ¥ 17 ¥ 61 Performance guarantees 4,179 4,066 53 29 31 Total ¥ 9,154 ¥ 8,885 ¥ 131 ¥ 46 ¥ 92 At September 30, 2023: 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 ¥ 5,087 ¥ 4,972 ¥ 88 ¥ 10 ¥ 17 Performance guarantees 4,697 4,598 35 27 37 Total ¥ 9,784 ¥ 9,570 ¥ 123 ¥ 37 ¥ 54 Note: (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, 2023. The guarantees that 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, 2023. 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, 2023. The table below presents the contractual amounts with regard to such instruments at March 31, 2023 and September 30, 2023: March 31, September 30, 2023 (in billions) Commitments to extend credit ¥ 88,631 ¥ 92,387 Commercial letters of credit 871 894 Commitments to make investments 705 712

Contingent Liabilities

Contingent Liabilities	6 Months Ended
	Sep. 30, 2023
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 ¥12,113 million and ¥9,070 million as of March 31, 2023 and September 30, 2023, respectively. Provision (reversal) related to the allowance for the six months ended September 30, 2022 and 2023 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, 2023
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, 2023 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, 2023 and September 30, 2023: Consolidated VIEs Consolidated assets At March 31, 2023: 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 ¥ 7,388,845 ¥ 71,649 ¥ 34,521 ¥ 47,606 ¥ 1,027,862 ¥ 6,185,514 ¥ 21,693 Investment funds 1,331,962 — 46,157 359,777 65,204 — 860,824 Special purpose entities created for structured financing 248,952 — 2,593 8,624 — 135,606 102,129 Repackaged instruments 243,513 7,882 — 167,007 53,617 15,007 — Securitization of the MUFG Group’s assets 10,389,398 — 1,434 — — 10,371,275 16,689 Trust arrangements 8,176,795 — — 833,864 1,514,530 5,828,397 4 Other 62,109 584 3,952 14,606 16,159 2,822 23,986 Total consolidated assets before elimination 27,841,574 80,115 88,657 1,431,484 2,677,372 22,538,621 1,025,325 The amounts eliminated in consolidation (6,739,954) (71,872) (36,626) (63,556) (600,635) (5,940,036) (27,229) Total consolidated assets ¥ 21,101,620 ¥ 8,243 ¥ 52,031 ¥ 1,367,928 ¥ 2,076,737 ¥ 16,598,585 ¥ 998,096 Consolidated liabilities Total Deposits Other short-term borrowings Long-term debt All other liabilities (in millions) Asset-backed conduits ¥ 7,364,030 ¥ — ¥ 5,587,813 ¥ 1,367,234 ¥ 408,983 Investment funds 830,751 — 817,292 7,407 6,052 Special purpose entities created for structured financing 127,768 — — 109,352 18,416 Repackaged instruments 245,829 — — 230,285 15,544 Securitization of the MUFG Group’s assets 10,418,160 — — 10,154,662 263,498 Trust arrangements 8,176,907 6,408,837 840,690 — 927,380 Other 56,902 — 1,456 31,900 23,546 Total consolidated liabilities before elimination 27,220,347 6,408,837 7,247,251 11,900,840 1,663,419 The amounts eliminated in consolidation (16,102,106) (302) (3,696,647) (11,469,378) (935,779) The amount of liabilities with recourse to the general credit of the MUFG Group (10,503,305) (6,408,535) (3,505,172) (25,033) (564,565) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 614,936 ¥ — ¥ 45,432 ¥ 406,429 ¥ 163,075 Consolidated VIEs Consolidated assets At September 30, 2023: Total Cash and due from banks Interest-earning deposits in other banks Trading account assets Investment securities Loans All other (in millions) Asset-backed conduits ¥ 7,732,815 ¥ 77,234 ¥ 30,077 ¥ 68,683 ¥ 969,899 ¥ 6,539,924 ¥ 46,998 Investment funds 1,467,112 901 116,379 327,950 73,117 — 948,765 Special purpose entities created for structured financing 250,614 — 3,293 8,071 — 147,264 91,986 Repackaged instruments 288,371 7,132 — 136,973 129,266 15,000 — Securitization of the MUFG Group’s assets 10,786,948 — 1,431 — — 10,766,601 18,916 Trust arrangements 8,770,532 — — 840,042 1,524,982 6,405,502 6 Other 67,548 499 3,794 24,726 16,249 2,597 19,683 Total consolidated assets before elimination 29,363,940 85,766 154,974 1,406,445 2,713,513 23,876,888 1,126,354 The amounts eliminated in consolidation (7,426,415) (78,356) (92,361) (98,158) (600,372) (6,527,631) (29,537) Total consolidated assets ¥ 21,937,525 ¥ 7,410 ¥ 62,613 ¥ 1,308,287 ¥ 2,113,141 ¥ 17,349,257 ¥ 1,096,817 Consolidated liabilities Total Deposits Other short-term borrowings Long-term debt All other (in millions) Asset-backed conduits ¥ 7,697,001 ¥ — ¥ 5,880,073 ¥ 1,362,328 ¥ 454,600 Investment funds 951,058 — 934,436 8,339 8,283 Special purpose entities created for structured financing 123,698 — — 119,496 4,202 Repackaged instruments 296,297 — — 281,304 14,993 Securitization of the MUFG Group’s assets 10,798,823 — — 10,524,243 274,580 Trust arrangements 8,770,460 6,988,735 850,957 — 930,768 Other 62,254 — 1,173 41,972 19,109 Total consolidated liabilities before elimination 28,699,591 6,988,735 7,666,639 12,337,682 1,706,535 The amounts eliminated in consolidation (16,622,457) (1,337) (3,744,249) (11,935,141) (941,730) The amount of liabilities with recourse to the general credit of the MUFG Group (11,581,012) (6,987,398) (3,882,245) (28,439) (682,930) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 496,122 ¥ — ¥ 40,145 ¥ 374,102 ¥ 81,875 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, 2023 and September 30, 2023: Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At March 31, 2023: Total assets Maximum exposure Total Trading account assets Investment securities Loans All other assets Total All other liabilities (in millions) Asset-backed conduits ¥ 41,001,958 ¥ 8,062,589 ¥ 6,384,079 ¥ 21,719 ¥ 2,205,877 ¥ 4,142,995 ¥ 13,488 ¥ 10,823 ¥ 10,823 Investment funds 55,386,213 4,930,989 3,446,109 262,312 120,436 2,710,177 353,184 27,606 27,606 Special purpose entities created for structured financing 54,543,066 5,864,814 3,907,598 80,382 39,357 3,749,670 38,189 208,100 208,100 Repackaged instruments 9,034,058 4,372,581 4,117,969 944,795 2,641,384 386,793 144,997 2,230 2,230 Other 87,989,676 3,989,548 2,761,087 146,286 7,552 2,523,976 83,273 46,354 46,354 Total ¥ 247,954,971 ¥ 27,220,521 ¥ 20,616,842 ¥ 1,455,494 ¥ 5,014,606 ¥ 13,513,611 ¥ 633,131 ¥ 295,113 ¥ 295,113 Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At September 30, 2023: Total assets Maximum exposure Total Trading account assets Investment securities Loans All other Total All other liabilities (in millions) Asset-backed conduits ¥ 47,471,678 ¥ 9,089,567 ¥ 7,124,602 ¥ 12,163 ¥ 2,157,156 ¥ 4,942,714 ¥ 12,569 ¥ 18,936 ¥ 18,936 Investment funds 96,500,851 6,697,234 4,355,603 452,953 168,683 3,310,669 423,298 42,092 42,092 Special purpose entities created for structured financing 66,635,155 7,309,836 4,838,196 66,104 43,255 4,685,051 43,786 382,651 382,651 Repackaged instruments 9,710,418 5,016,578 4,846,411 1,436,901 2,805,459 427,025 177,026 1,342 1,342 Other 89,295,182 4,721,771 3,139,977 221,414 3,716 2,858,393 56,454 31,282 31,282 Total ¥ 309,613,284 ¥ 32,834,986 ¥ 24,304,789 ¥ 2,189,535 ¥ 5,178,269 ¥ 16,223,852 ¥ 713,133 ¥ 476,303 ¥ 476,303 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, 2023
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, 2022 and 2023 are as follows: 2022 2023 (in millions) Fees and commissions on deposits ¥ 27,784 ¥ 18,310 Fees and commissions on remittances and transfers 73,627 73,427 Fees and commissions on foreign trading business 35,165 36,901 Fees and commissions on credit card business 111,697 120,071 Fees and commissions on security-related services 107,541 132,829 Fees and commissions on administration and management services for investment funds 133,070 150,525 Trust fees 66,832 62,724 Guarantee fees (1) 23,481 25,237 Insurance commissions 22,259 26,482 Fees and commissions on real estate business 21,984 22,347 Other fees and commissions (2) 164,202 212,405 Total ¥ 787,642 ¥ 881,258 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”) and Global Corporate Investment Banking Business Group (“GCIB”) 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 and GCIB 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. The business activities relevant to fees and commissions on real estate business are attributable to R&C and JCIB with no significant concentration in any particular segments.

Business Segments

Business Segments	6 Months Ended
	Sep. 30, 2023
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 Japanese GAAP 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 does not use information on the segments’ total assets to allocate its resources and assess performance. Accordingly, business segment information on total assets is not presented. However, in order to ensure more efficient management of resources, and to strengthen controls on profits and losses in each business group, the MUFG Group allocate fixed assets of both MUFG Bank on a stand-alone basis and Mitsubishi UFJ Trust and Banking on a stand-alone basis to each business unit. Accordingly, such fixed assets allocated to business groups are presented below. 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 companies, 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 individuals) 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 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 offers 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 large non-Japanese 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. The MUFG Group made modifications to its internal management accounting rules and practices, effective April 1, 2023, including reallocation of indirect expenses to the Retail & Commercial Banking Business Group from the Digital Service Business Group as well as updates to internal booking rules relating to net revenue in the customer business groups. Corresponding adjustments were booked in Other. There was no impact of these modifications on the Global Commercial Banking Business Group and the Asset Management & Investor Services Business Group. These modifications had the following impact on its previously reported business segment information for the six months ended September 30, 2022: • increasing the operating profits of the Digital Service Business Group, the Retail & Commercial Banking Business Group and the Global Corporate & Investment Banking Business Group by ¥3.5 billion, ¥0.8 billion and ¥0.3 billion, respectively, and • reducing the operating profits of Other, the Global Markets Business Group and the Japanese Corporate & Investment Banking Business Group by ¥3.0 billion, ¥1.0 billion and ¥0.6 billion, respectively. Prior period business segment information has been restated to enable comparison between the relevant amounts for the six months ended September 30, 2022 and 2023. Customer Business Digital Retail & Japanese Global Asset Global Total Global Other Total (in billions) Six months ended September 30, 2022: Net revenue: ¥ 371.7 ¥ 283.8 ¥ 345.3 ¥ 447.4 ¥ 177.2 ¥ 345.5 ¥ 1,970.9 ¥ 360.6 ¥ 13.4 ¥ 2,344.9 BK and TB (1) : 127.2 194.6 277.5 27.3 53.0 247.4 927.0 225.6 23.5 1,176.1 Net interest income 106.7 90.8 153.0 27.3 5.3 114.5 497.6 604.6 57.8 1,160.0 Net fees 19.2 87.2 91.9 — 47.8 114.1 360.2 (8.6) (30.7) 320.9 Other 1.3 16.6 32.6 — (0.1) 18.8 69.2 (370.4) (3.6) (304.8) Other than BK and TB 244.5 89.2 67.8 420.1 124.2 98.1 1,043.9 135.0 (10.1) 1,168.8 Operating expenses 259.0 227.6 165.8 305.0 123.4 168.4 1,249.2 136.3 69.8 1,455.3 Operating profit (loss) ¥ 112.7 ¥ 56.2 ¥ 179.5 ¥ 142.4 ¥ 53.8 ¥ 177.1 ¥ 721.7 ¥ 224.3 ¥ (56.4) ¥ 889.6 Fixed assets (2) ¥ 147.5 ¥ 199.1 ¥ 157.1 ¥ 1.2 ¥ 13.7 ¥ 134.5 ¥ 653.1 ¥ 108.7 ¥ 541.5 ¥ 1,303.3 Increase in fixed assets (3) ¥ 15.2 ¥ 21.0 ¥ 17.7 ¥ 0.4 ¥ 3.2 ¥ 9.7 ¥ 67.2 ¥ 10.4 ¥ 9.6 ¥ 87.2 Depreciation (3) ¥ 5.1 ¥ 11.0 ¥ 18.0 ¥ 0.1 ¥ 2.8 ¥ 15.5 ¥ 52.5 ¥ 13.3 ¥ 8.8 ¥ 74.6 Six months ended September 30, 2023: Net revenue: ¥ 380.2 ¥ 318.8 ¥ 463.8 ¥ 310.9 ¥ 205.7 ¥ 418.4 ¥ 2,097.8 ¥ 381.7 ¥ 25.0 ¥ 2,504.5 BK and TB (1) : 124.3 220.0 376.8 19.6 56.8 376.6 1,174.1 229.4 106.3 1,509.8 Net interest income 106.9 115.1 237.4 19.1 6.5 195.6 680.6 119.3 86.6 886.5 Net fees 16.6 91.1 104.9 — 50.3 162.4 425.3 (9.3) (7.2) 408.8 Other 0.8 13.8 34.5 0.5 — 18.6 68.2 119.4 26.9 214.5 Other than BK and TB 255.9 98.8 87.0 291.3 148.9 41.8 923.7 152.3 (81.3) 994.7 Operating expenses 264.2 230.8 169.4 174.9 145.7 174.1 1,159.1 149.9 117.6 1,426.6 Operating profit (loss) ¥ 116.0 ¥ 88.0 ¥ 294.4 ¥ 136.0 ¥ 60.0 ¥ 244.3 ¥ 938.7 ¥ 231.8 ¥ (92.6) ¥ 1,077.9 Fixed assets (2) ¥ 172.8 ¥ 211.0 ¥ 161.0 ¥ 1.3 ¥ 22.1 ¥ 168.4 ¥ 736.6 ¥ 108.4 ¥ 531.9 ¥ 1,376.9 Increase in fixed assets (3) ¥ 19.1 ¥ 20.8 ¥ 22.3 ¥ 0.2 ¥ 7.3 ¥ 15.9 ¥ 85.6 ¥ 13.1 ¥ 15.3 ¥ 114.0 Depreciation (3) ¥ 7.0 ¥ 12.0 ¥ 21.2 ¥ 0.1 ¥ 4.0 ¥ 21.8 ¥ 66.1 ¥ 15.5 ¥ 8.6 ¥ 90.2 Notes: (1) “BK and TB” is a sum of MUFG Bank on a stand-alone basis (BK) and Mitsubishi UFJ Trust and Banking on a stand-alone basis (TB). (2) Fixed assets in the above table are based on the financial information prepared in accordance with Japanese GAAP as adjusted in accordance with internal management accounting rules and practices, and the amounts correspond to premises and equipment-net, intangible assets-net and goodwill of BK and TB. Fixed assets of MUFG and other consolidated subsidiaries and Japanese GAAP consolidation adjustments amounting to ¥1,422.4 billion as of September 30, 2022 and ¥1,344.5 billion as of September 30, 2023, respectively, are not allocated to each business segment when determining the allocation of management resources and assessing performance and, therefore, such amounts are not included in the table above. (3) These amounts are related to the fixed assets of BK and TB included in the table above. 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 operations. 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 operations. A reconciliation of operating profit and fixed assets under the internal management reporting system for the six months ended September 30, 2022 and 2023 above to income before income tax expense shown in the accompanying condensed consolidated statements of operations and the total amount of premises and equipment-net, intangible assets-net and goodwill are as follows: Six months ended 2022 2023 (in billions) Operating profit: ¥ 890 ¥ 1,078 Reversal of (provision for) credit losses 98 (62) Foreign exchange losses—net (165) (385) Trading account losses—net (1,670) (1,133) Equity investment securities gains (losses)—net (433) 624 Debt investment securities gains—net 199 102 Equity in earnings of equity method investees—net 187 215 Reversal of off-balance sheet credit instruments 12 4 Reversal of impairment of assets held for sale 134 — Loss on valuation adjustment for loans held for sale held by MUFG Union Bank (209) — Other—net (335) (159) Income (loss) before income tax expense (benefit) ¥ (1,292) ¥ 284 Fixed assets: ¥ 1,303 ¥ 1,377 U.S. GAAP adjustments and other 1,088 1,100 Premises and equipment-net, Intangible assets-net and Goodwill ¥ 2,391 ¥ 2,477

Fair Value

Fair Value	6 Months Ended
	Sep. 30, 2023
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, 2023. During the six months ended September 30, 2023, 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, 2023 and September 30, 2023: At March 31, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 19,098,208 ¥ 12,746,415 ¥ 1,182,319 ¥ 33,026,942 Debt securities Japanese national government and Japanese government agency bonds 6,092,523 329,502 — 6,422,025 Japanese prefectural and municipal bonds — 279,168 — 279,168 Foreign government and official institution bonds 11,760,274 493,691 1,168 12,255,133 Corporate bonds 3,965 2,252,424 — 2,256,389 Residential mortgage-backed securities — 4,978,709 — 4,978,709 Commercial mortgage-backed securities — 4,627 — 4,627 Asset-backed securities — 1,210,381 668,911 1,879,292 Other debt securities — — 334,124 334,124 Commercial paper — 1,931,569 — 1,931,569 Equity securities (2) 1,241,446 1,266,344 178,116 2,685,906 Trading derivative assets 84,406 12,674,978 142,343 12,901,727 Interest rate contracts 40,013 7,311,689 93,833 7,445,535 Foreign exchange contracts 3,909 5,258,511 13,714 5,276,134 Equity contracts 40,484 28,617 20,659 89,760 Commodity contracts — 17 9,908 9,925 Credit derivatives — 76,144 3,801 79,945 Other (8) — — 428 428 Trading loans (3) — 13,820 — 13,820 Investment securities: Available-for-sale debt securities 25,236,359 10,250,511 253,932 35,740,802 Japanese national government and Japanese government agency bonds 23,292,055 2,754,548 — 26,046,603 Japanese prefectural and municipal bonds — 2,759,941 — 2,759,941 Foreign government and official institution bonds 1,944,304 978,438 — 2,922,742 Corporate bonds — 1,056,191 1,970 1,058,161 Residential mortgage-backed securities — 1,110,239 15 1,110,254 Asset-backed securities — 1,247,377 182,938 1,430,315 Other debt securities — 343,777 69,009 412,786 Equity securities 4,362,017 101,576 74,761 4,538,354 Marketable equity securities 4,362,017 101,576 — 4,463,593 Nonmarketable equity securities (4) — — 74,761 74,761 Other (5) 1,535,446 848,596 92,251 2,476,293 Total ¥ 50,316,436 ¥ 36,635,896 ¥ 1,745,606 ¥ 88,697,938 At March 31, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 232,287 ¥ 2,620 ¥ — ¥ 234,907 Trading derivative liabilities 163,129 13,718,992 61,247 13,943,368 Interest rate contracts 85,641 8,566,043 45,204 8,696,888 Foreign exchange contracts 1,679 5,013,909 2,369 5,017,957 Equity contracts 75,809 48,953 3,731 128,493 Commodity contracts — — 9,817 9,817 Credit derivatives — 90,087 62 90,149 Other (8) — — 64 64 Obligation to return securities received as collateral (6) 6,664,578 158,763 68,204 6,891,545 Other (7) — 313,482 73,663 387,145 Total ¥ 7,059,994 ¥ 14,193,857 ¥ 203,114 ¥ 21,456,965 At September 30, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 15,816,502 ¥ 14,709,285 ¥ 1,816,498 ¥ 32,342,285 Debt securities Japanese national government and Japanese government agency bonds 6,491,075 497,522 — 6,988,597 Japanese prefectural and municipal bonds — 211,107 — 211,107 Foreign government and official institution bonds 7,754,392 792,052 150 8,546,594 Corporate bonds — 2,660,321 — 2,660,321 Residential mortgage-backed securities — 5,585,266 — 5,585,266 Asset-backed securities — 1,246,481 1,118,759 2,365,240 Other debt securities — 2,135 517,349 519,484 Commercial paper — 2,428,377 — 2,428,377 Equity securities (2) 1,571,035 1,286,024 180,240 3,037,299 Trading derivative assets 143,551 18,330,520 71,219 18,545,290 Interest rate contracts 55,656 11,071,557 23,369 11,150,582 Foreign exchange contracts 4,661 7,159,046 11,989 7,175,696 Equity contracts 83,234 50,814 15,589 149,637 Commodity contracts — 476 18,548 19,024 Credit derivatives — 48,610 1,449 50,059 Other (8) — 17 275 292 Trading loans (3) — 22,996 — 22,996 Investment securities: Available-for-sale debt securities 23,749,188 8,281,883 341,708 32,372,779 Japanese national government and Japanese government agency bonds 21,647,505 2,158,975 — 23,806,480 Japanese prefectural and municipal bonds — 1,435,996 — 1,435,996 Foreign government and official institution bonds 2,101,683 1,045,758 — 3,147,441 Corporate bonds — 994,968 2,193 997,161 Residential mortgage-backed securities — 1,190,307 15 1,190,322 Asset-backed securities — 1,060,851 272,720 1,333,571 Other debt securities — 395,028 66,780 461,808 Equity securities 4,934,283 81,667 82,488 5,098,438 Marketable equity securities 4,934,283 81,568 — 5,015,851 Nonmarketable equity securities (4) — 99 82,488 82,587 Other (5) 854,305 962,406 120,275 1,936,986 Total ¥ 45,497,829 ¥ 42,388,757 ¥ 2,432,188 ¥ 90,318,774 At September 30, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 81,006 ¥ 6,877 ¥ — ¥ 87,883 Trading derivative liabilities 106,471 20,064,626 56,184 20,227,281 Interest rate contracts 28,508 12,746,145 34,249 12,808,902 Foreign exchange contracts 4,886 7,195,310 2,290 7,202,486 Equity contracts 73,077 51,854 530 125,461 Commodity contracts — — 18,592 18,592 Credit derivatives — 71,307 252 71,559 Other (8) — 10 271 281 Obligation to return securities received as collateral (6) 6,602,613 219,257 73,257 6,895,127 Other (7) — 268,535 28,932 297,467 Total ¥ 6,790,090 ¥ 20,559,295 ¥ 158,373 ¥ 27,507,758 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, 2023 were ¥225,972 million and those at September 30, 2023 were ¥267,084 million, respectively. The amounts of unfunded commitments related to these private equity funds at March 31, 2023 were ¥172,562 million, and those at September 30, 2023 were ¥230,396 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, 2023. (3) Includes loans measured under the fair value option. (4) Excludes certain investments valued at net asset value of real estate funds and private equity and other funds whose fair values at March 31, 2023 were ¥29,308 million and ¥51,458 million, respectively, and those at September 30, 2023 were ¥32,322 million and ¥57,383 million, respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2023 were ¥1,305 million and nil, respectively, and those at September 30, 2023 were ¥1,018 million and ¥250 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, 2023. (5) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions. (6) Included in Other liabilities. (7) Mainly includes other short-term borrowings, long-term debt and bifurcated embedded derivatives carried at fair value. (8) Includes certain derivatives such as earthquake derivatives. 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, 2022 and 2023. 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, 2022 March 31, 2022 Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2022 (in millions) Assets Trading account assets: Trading securities (1) ¥ 797,997 ¥ 125,172 (2) ¥ — ¥ 333,302 ¥ — ¥ (21,408) ¥ (9,255) ¥ — ¥ (877) ¥ 1,224,931 ¥ 121,950 (2) Debt securities Foreign government and official institution bonds 1,711 57 — 5,712 — (5,765) (250) — (194) 1,271 5 Corporate bonds 683 — — — — — — — (683) — — Asset-backed securities 315,231 72,667 — 324,375 — (15,636) (259) — — 696,378 71,580 Other debt securities 313,166 44,986 — — — — — — — 358,152 44,986 Equity securities 167,206 7,462 — 3,215 — (7) (8,746) — — 169,130 5,379 Trading derivatives—net 71,089 (24,159) (2) 1,775 612 (334) — (19,889) 20,791 (25,003) 24,882 (21,160) (2) Interest rate contracts—net 37,493 (39,744) 30 — — — (1,901) 20,612 (5) (25,017) (5) (8,527) (33,999) Foreign exchange contracts—net 7,463 3,509 392 — — — (4,200) 179 56 7,399 1,705 Equity contracts—net 23,420 10,723 1,355 19 — — (13,639) — (42) 21,836 9,785 Commodity contracts—net (45) 26 (2) — — — (5) — — (26) 27 Credit derivatives—net 2,729 1,236 — — — — (144) — — 3,821 1,232 Other—net (8) 29 91 — 593 (334) — — — — 379 90 Investment securities: Available-for-sale debt securities 212,936 (1,096) (3) 30,227 170,610 — — (141,788) 1,405 — 272,294 23,794 (3) Foreign government and official institution bonds 11,890 — (925) 128 — — (11,093) — — — — Corporate bonds 3,089 (42) 210 1,824 — — (57) 1,255 — 6,279 165 Residential mortgage-backed securities 15 — — — — — — — — 15 — Asset-backed securities 124,379 (1,125) 21,490 168,312 — — (130,638) — — 182,418 14,106 Other debt securities 73,563 71 9,452 346 — — — 150 — 83,582 9,523 Equity securities 55,883 1,881 (3) 495 9,884 — (1,336) (806) 2,855 (236) 68,620 1,737 (3) Nonmarketable equity securities 55,883 1,881 495 9,884 — (1,336) (806) 2,855 (236) 68,620 1,737 Other 4,912 357 (7) (3) 89,081 — — (111) 1,925 — 96,161 357 (7) Assets held for sale 76,918 3,928 (9) 13,071 1,120 — (1,158) (9,254) — — 84,625 15,113 (9) Investment securities 65,262 (1,261) 10,114 93 — (1,158) (9,254) — — 63,796 7,456 Other 11,656 5,189 2,957 1,027 — — — — — 20,829 7,657 Total ¥ 1,219,735 ¥ 106,083 ¥ 45,565 ¥ 604,609 ¥ (334) ¥ (23,902) ¥ (181,103) ¥ 26,976 ¥ (26,116) ¥ 1,771,513 ¥ 141,791 Liabilities Obligation to return securities received as collateral ¥ — ¥ — ¥ — ¥ — ¥ 73,595 ¥ — ¥ — ¥ — ¥ — ¥ 73,595 ¥ — Other 16,463 54,070 (4) (10,269) — 54,527 — (19,043) 116,892 (6) (3,554) (6) 121,484 58,483 (4) Total ¥ 16,463 ¥ 54,070 ¥ (10,269) ¥ — ¥ 128,122 ¥ — ¥ (19,043) ¥ 116,892 ¥ (3,554) ¥ 195,079 ¥ 58,483 Total gains (losses) Change in unrealized gains (losses) for assets and liabilities still held at September 30, 2023 March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2023 (in millions) Assets Trading account assets: Trading securities (1) ¥ 1,182,319 ¥ 149,674 (2) ¥ — ¥ 494,881 ¥ — ¥ (626) ¥ (9,895) ¥ 145 ¥ — ¥ 1,816,498 ¥ 148,307 (2) Debt securities Foreign government and official institution bonds 1,168 122 — 7 — (7) (1,140) — — 150 (1) Asset-backed securities 668,911 108,122 — 345,917 — — (4,191) — — 1,118,759 107,898 Other debt securities 334,124 42,225 — 141,000 — — — — — 517,349 42,225 Equity securities 178,116 (795) — 7,957 — (619) (4,564) 145 — 180,240 (1,815) Trading derivatives—net 81,096 (12,416) (2) 1,836 4 (355) — (10,117) 10,271 (55,284) 15,035 (14,426) (2) Interest rate contracts—net 48,629 (16,890) (1,036) — — — 1,267 10,595 (5) (53,445) (5) (10,880) (18,757) Foreign exchange contracts—net 11,345 (2,797) 999 — — — 417 (324) 59 9,699 (2,220) Equity contracts—net 16,928 8,065 1,874 4 — — (11,696) — (116) 15,059 7,327 Commodity contracts—net 91 (128) (1) — — — (6) — — (44) (128) Credit derivatives—net 3,739 (661) — — — — (99) — (1,782) 1,197 (648) Other—net (8) 364 (5) — — (355) — — — — 4 — Investment securities: Available-for-sale debt securities 253,932 1,677 (3) 20,568 205,826 — — (140,321) 26 — 341,708 18,299 (3) Corporate bonds 1,970 (2) 203 — — — (4) 26 — 2,193 201 Residential mortgage-backed securities 15 — — — — — — — — 15 — Asset-backed securities 182,938 1,597 15,841 205,611 — — (133,267) — — 272,720 13,492 Other debt securities 69,009 82 4,524 215 — — (7,050) — — 66,780 4,606 Equity securities 74,761 3,385 (3) 408 5,870 — (1,474) — — (462) 82,488 2,503 (3) Nonmarketable equity securities 74,761 3,385 408 5,870 — (1,474) — — (462) 82,488 2,503 Other 92,251 (37) (7) 154 27,955 — — (48) — — 120,275 (37) (7) Total ¥ 1,684,359 ¥ 142,283 ¥ 22,966 ¥ 734,536 ¥ (355) ¥ (2,100) ¥ (160,381) ¥ 10,442 ¥ (55,746) ¥ 2,376,004 ¥ 154,646 Liabilities Obligation to return securities received as collateral ¥ 68,204 ¥ — ¥ — ¥ — ¥ 5,053 ¥ — ¥ — ¥ — ¥ — ¥ 73,257 ¥ — Other 73,663 (24,475) (4) (5,791) — 23,080 — (54,619) 5,147 (6) (48,605) (6) 28,932 (6,980) (4) Total ¥ 141,867 ¥ (24,475) ¥ (5,791) ¥ — ¥ 28,133 ¥ — ¥ (54,619) ¥ 5,147 ¥ (48,605) ¥ 102,189 ¥ (6,980) Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account losses—net and Foreign exchange losses—net. (3) Included in Investment securities gains (losses)—net and Other comprehensive income (loss), net of tax. (4) Included in Trading account losses—net and Other comprehensive income (loss), net of tax. (5) For the six months ended September 30, 2022 and 2023, transfers into Level 3 for Interest rate contracts—net were mainly caused by changes in the impact of unobservable input to the entire fair value measurement. Unobservable inputs include loss given default. Transfers out of Level 3 for Interest rate contracts—net were mainly caused by changes in the impact of unobservable inputs to the fair value measurement of the multi-callable swaps. (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) Includes certain derivatives such as earthquake derivatives. (9) Included in Investment securities gains (losses)—net, Trading account losses—net, Fees and commissions income and Other comprehensive income (loss), net of tax. 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, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Residential mortgage-backed securities and Asset-backed securities ¥ 101,014 Discounted cash flow Recovery rate 100.0% 100.0 % 591,515 Internal model (4) Asset correlations 3.0% 3.0 % Discount factor 2.0 % ~ 2.3 % 2.0 % Prepayment rate 13.1% 13.1 % Probability of default 0.0 % ~ 99.0 % — (3) Recovery rate 72.2% 72.2 % Other debt securities 385,046 Discounted cash flow Liquidity premium 0.9 % ~ 3.2 % 2.8 % At March 31, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 48,209 Option model Correlation between interest rates 30.0 % ~ 60.6 % 44.4 % Correlation between interest rate and foreign exchange rate 2.0 % ~ 60.0 % 36.6 % Volatility 70.3 % ~ 106.7 % 80.1 % Foreign exchange contracts—net 11,345 Option model Correlation between interest rates 30.0 % ~ 70.0 % 50.6 % Correlation between interest rate and foreign exchange rate 14.3 % ~ 60.0 % 36.8 % Correlation between foreign exchange rates 50.0 % ~ 70.6 % 66.4 % Volatility 10.6 % ~ 23.0 % 15.6 % Equity contracts—net 3,316 Option model Correlation between foreign exchange rate and equity (58.4) % ~ 55.0 % 15.0 % Correlation between equities 5.6 % ~ 95.0 % 54.1 % Volatility 28.0 % ~ 37.0 % 32.2 % 13,612 Discounted cash flow Term of litigation 0.1 years ~ 1.0 year 0.5 years At September 30, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Residential mortgage-backed securities and Asset-backed securities ¥ 111,944 Discounted cash flow Recovery rate 100.0% 100.0 % 1,031,791 Internal model (4) Asset correlations 3.0% 3.0 % Discount factor 1.8 % ~ 2.0 % 1.8 % Prepayment rate 13.9% 13.9 % Probability of default 0.0 % ~ 99.0 % — (3) Recovery rate 57.7% 57.7 % Other debt securities 565,788 Discounted cash flow Liquidity premium 0.9 % ~ 3.2 % 2.8 % At September 30, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net (10,880) Option model Correlation between interest rates 30.0 % ~ 60.3 % 43.6 % Correlation between interest rate and foreign exchange rate 1.3 % ~ 60.0 % 36.2 % Volatility 49.9 % ~ 72.2 % 69.2 % Foreign exchange contracts—net 9,699 Option model Correlation between interest rates 30.0 % ~ 70.0 % 51.0 % Correlation between interest rate and foreign exchange rate 20.0 % ~ 60.0 % 37.0 % Correlation between foreign exchange rates 50.0 % 70.6 % 66.4 % Volatility 10.6 % ~ 21.9 % 14.5 % Equity contracts—net 7,589 Option model Correlation between foreign exchange rate and equity (58.4) % ~ 30.0 % 10.0 % Correlation between equities 5.8 % ~ 95.0 % 53.1 % Volatility 28.5 % ~ 37.0 % 33.6 % 7,470 Discounted cash flow Term of litigation 0.3 years ~ 0.8 years 0.5 years Notes: (1) The fair value as of March 31, 2023 and September 30, 2023 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, 2023. (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, 2023. 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, 2023. 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, 2023 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, 2023 and September 30, 2023: March 31, 2023 September 30, 2023 Level 1 Level 2 Level 3 Total carrying value Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ 13,366 ¥ 13,271 ¥ 26,637 ¥ — ¥ 9,560 ¥ 44,882 ¥ 54,442 Loans 1,917 3,388 611,055 616,360 2,389 4,222 745,699 752,310 Loans held for sale — — 439,361 439,361 — — 584,558 584,558 Collateral dependent loans 1,917 3,388 171,694 176,999 2,389 4,222 161,141 167,752 Premises and equipment — — 11,835 11,835 — — 3,866 3,866 Intangible assets — — 309 309 — — 5,063 5,063 Goodwill — — 184,364 184,364 — — — — Other assets 178,592 — 29,003 207,595 — 38,152 24,622 62,774 Investments in equity method investees (1) 178,592 — 12,472 191,064 — 33,222 1,740 34,962 Other — — 16,531 16,531 — 4,930 22,882 27,812 Total ¥ 180,509 ¥ 16,754 ¥ 849,837 ¥ 1,047,100 ¥ 2,389 ¥ 51,934 ¥ 824,132 ¥ 878,455 Notes: (1) Excludes certain investments valued at net asset value of ¥33,595 million and ¥11,184 million at March 31, 2023 and September 30, 2023, respectively. The unfunded commitments related to these investments are ¥23,029 million and ¥18,170 million at March 31, 2023 and September 30, 2023, 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, 2023. (2) Includes certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including impairment and observable price change for nonmarketable equity securities measured under the measurement alternative. The following table presents losses (gains) recorded as a result of changes in the fair value of assets measured at fair value on a nonrecurring basis for the six months ended September 30, 2022 and 2023: Losses (gains) for the six months ended September 30, 2022 2023 (in millions) Investment securities ¥ 505 ¥ 8,971 Loans (66) 44,746 Loans held for sale 451 11,096 Collateral dependent loans (517) 33,650 Premises and equipment 2,579 1,142 Intangible assets 849 11,433 Other assets 50,761 22,809 Investments in equity method investees 46,928 12,687 Other 3,833 10,122 Assets held for sale 209,107 — Loans held for sale 209,107 — Total (1) ¥ 263,735 ¥ 89,101 Note: (1) In addition to the above table, the assets and liabilities of MUFG Union Bank, which were transferred to U.S. Bancorp, were reclassified as held for sale. As a result, the disposal group was measured at the lower of carrying value or fair value less costs to sell. The impairment of assets held for sale of ¥134,141 million was recognized during the second half of the fiscal year ended March 31, 2022. However, the fair value less cost to sell exceeded the carrying value as of September 30, 2022, and the reversal of ¥134,141 million, which is included in Reversal of impairment of assets held for sale in the consolidated statements of operations through the six months ended September 30, 2022, was recognized. 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, 2023. The following table presents the gains or losses recorded for the six months ended September 30, 2022 and 2023 related to the eligible instruments for which the MUFG Group elected the fair value option: Six months ended September 30, 2022 2023 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 ¥ (1,434,189) ¥ 2,339,864 ¥ 905,675 ¥ (596,477) ¥ 1,762,384 ¥ 1,165,907 Total ¥ (1,434,189) ¥ 2,339,864 ¥ 905,675 ¥ (596,477) ¥ 1,762,384 ¥ 1,165,907 Financial liabilities: Other short-term borrowings (1) ¥ (3,295) ¥ — ¥ (3,295) ¥ 2,592 ¥ — ¥ 2,592 Long-term debt (1) 57,444 — 57,444 (5,617) — (5,617) Total ¥ 54,149 ¥ — ¥ 54,149 ¥ (3,025) ¥ — ¥ (3,025) 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, 2023 and September 30, 2023 for long-term debt instruments for which the fair value option has been elected: March 31, 2023 September 30, 2023 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 ¥ 501,982 ¥ 431,338 ¥ (70,644) ¥ 363,840 ¥ 339,840 ¥ (24,000) Total ¥ 501,982 ¥ 431,338 ¥ (70,644) ¥ 363,840 ¥ 339,840 ¥ (24,000) 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 operations 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, 2023 and September 30, 2023: At March 31, 2023 Carrying amount Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 60,051 ¥ 60,051 ¥ 60,051 ¥ — ¥ — Interest-earning deposits in other banks 53,990 53,990 — 53,990 — Call loans and funds sold 1,802 1,802 — 1,802 — Receivables under resale agreements 14,059 14,059 — 14,059 — Receivables under securities borrowing transactions 4,556 4,556 — 4,556 — Investment securities 21,520 21,386 13,527 5,354 2,505 Loans, net of allowance for credit losses (1) 118,679 118,933 2 263 118,668 Other financial assets (2) 10,108 10,108 — 10,108 — Financial liabilities: Deposits Non-interest-bearing ¥ 37,804 ¥ 37,804 ¥ — ¥ 37,804 ¥ — Interest-bearing 197,500 197,573 — 197,573 — Total deposits 235,304 235,377 — 235,377 — Call money and funds purchased 3,438 3,438 — 3,438 — Payables under repurchase agreements 40,132 40,132 — 40,132 — Payables under securities lending transactions 1,138 1,138 — 1,138 — Due to trust account and other short-term borrowings 14,260 14,260 — 14,260 — Long-term debt 38,704 37,928 — 37,928 — Other financial liabilities 9,595 9,595 — 9,595 — At September 30, 2023 Carrying Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 59,954 ¥ 59,954 ¥ 59,954 ¥ — ¥ — Interest-earning deposits in other banks 48,957 48,957 — 48,957 — Call loans and funds sold 2,970 2,970 — 2,970 — Receivables under resale agreements 16,370 16,370 — 16,370 — Receivables under securities borrowing transactions 5,085 5,085 — 5,085 — Investment securities 24,657 24,158 14,654 6,761 2,743 Loans, net of allowance for credit losses (1) 123,110 123,162 2 288 122,872 Other financial assets (2) 11,564 11,564 — 11,564 — Financial liabilities: Deposits Non-interest-bearing ¥ 38,084 ¥ 38,084 ¥ — ¥ 38,084 ¥ — Interest-bearing 205,757 205,841 — 205,841 — Total deposits 243,841 243,925 — 243,925 — Call money and funds purchased 3,854 3,854 — 3,854 — Payables under repurchase agreements 32,960 32,960 — 32,960 — Payables under securities lending transactions 1,017 1,017 — 1,017 — Due to trust account and other short-term borrowings 14,412 14,412 — 14,412 — Long-term debt 40,186 39,045 — 39,045 — Other financial liabilities 9,875 9,875 — 9,875 — 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 ¥3,482 billion and ¥3,950 billion at March 31, 2023 and September 30, 2023, respectively. 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, 2023 and September 30, 2023 was not material.

Investments in Equity Method In

Investments in Equity Method Investees	6 Months Ended
	Sep. 30, 2023
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, 2022 and 2023 are as follows: 2022 2023 (in billions) Net revenues ¥ 3,499 ¥ 3,769 Total non-interest expenses 2,582 2,887 Income from continuing operations before income taxes 899 840 Net income applicable to Morgan Stanley 687 647

Subsequent Events

Subsequent Events	6 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Approval of Dividends On November 14, 2023 the Board of Directors of MUFG approved the payment of semi-annual interim cash dividends of ¥20.5 per share of Common stock, totaling ¥247,101 million, that were payable on December 5, 2023 to the shareholders of record on September 30, 2023. Repurchase and Cancellation of own shares At the meeting of the Board of Directors of MUFG held on November 14, 2023, it was resolved to repurchase up to 400,000,000 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of its own shares for approximately ¥400 billion, in aggregate, from November 15, 2023 to March 31, 2024. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 400,000,000 shares, which represents the equivalent of 3.3% of the total number of common shares outstanding excluding its own shares, or of an aggregate repurchase amount of up to ¥400 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. Also, on November 30, 2023, MUFG canceled 350,000,000 shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 14, 2023.

Basis of Semiannual Condensed_2

Basis of Semiannual Condensed Consolidated Financial Statements (Policies)	6 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Description of Business	Description of Business
Basis of Financial Statements	Basis of Financial Statements The accompanying 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 have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). In certain respects, the accompanying condensed consolidated financial statements reflect adjustments to conform with U.S. GAAP and therefore are not included in the consolidated financial statements issued by MUFG in accordance with accounting principles generally accepted in Japan (“Japanese GAAP”) and certain of its subsidiaries in accordance with the corresponding applicable statutory requirements and accounting practices in their respective countries of incorporation. The major adjustments include those relating to (1) investment securities, (2) derivative financial instruments, (3) allowance for credit losses, (4) income taxes, (5) consolidation, (6) premises and equipment, (7) transfer of financial assets, (8) accrued severance indemnities and pension liabilities, (9) goodwill and other intangible assets and (10) lease transactions. The accompanying condensed semiannual consolidated financial statements should be read in conjunction with the consolidated financial statements for the fiscal year ended March 31, 2023. Certain information that would be included in annual financial statements but is not required for reporting purposes under U.S. GAAP has been omitted or condensed.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Accounting Changes	Accounting Changes Troubled Debt Restructurings and Vintage Disclosures —In March 2022, the Financial Accounting Standards Board (“FASB”) issued new guidance which eliminates the accounting and disclosure requirements for Troubled Debt Restructurings (“TDRs”) by creditors and introduces new required disclosures for loan modifications made to borrowers experiencing financial difficulty. The guidance also amends the requirement for vintage disclosures to disclose current period gross charge-offs by year of origination. This guidance is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The guidance should be applied prospectively, except for requirements related to the recognition and measurement of TDRs, for which entities have the option to apply a modified retrospective transition method. The MUFG Group adopted the guidance on April 1, 2023, using the modified retrospective transition method on the requirements related to the recognition and measurement of TDRs, and there was no material impact on its financial position and results of operations. The allowance for modified loans is mainly measured using a discounted cash flow methodology that utilizes a discount rate based on the post-modification contractual interest rate, other than those in the Card segment, for which the allowance is measured using collectively-assessed allowance methodology.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Fair Value Measurement of Equity Securities Subject to Contractual Sale Restriction —In June 2022, the FASB issued new guidance which clarifies the guidance when measuring the fair value of an equity security subject to contractual restrictions that prohibit the sale of an equity security. The guidance also introduces new disclosure requirements for equity securities subject to contractual sale restrictions that are measured at fair value. This guidance is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The MUFG Group is currently evaluating what effect this guidance will have on its consolidated financial statements and related disclosures.

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2023 and September 30, 2023: At March 31, 2023: 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 ¥ 26,153,862 ¥ 16,510 ¥ 123,769 ¥ 26,046,603 Japanese prefectural and municipal bonds 2,773,750 2,063 15,872 2,759,941 Foreign government and official institution bonds 3,029,042 2,072 108,372 2,922,742 Corporate bonds 1,051,347 9,791 2,977 1,058,161 Residential mortgage-backed securities 1,110,126 569 441 1,110,254 Asset-backed securities 1,418,563 16,116 4,364 1,430,315 Other debt securities 417,755 1,873 6,842 412,786 Total ¥ 35,954,445 ¥ 48,994 ¥ 262,637 ¥ 35,740,802 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 13,860,457 ¥ 32,927 ¥ 19,789 ¥ 13,873,595 Japanese prefectural and municipal bonds 1,144,825 2,473 7,808 1,139,490 Corporate bonds 46,730 213 3 46,940 Residential mortgage-backed securities 3,913,346 13,606 105,754 3,821,198 Asset-backed securities 2,554,723 19 49,809 2,504,933 Total ¥ 21,520,081 ¥ 49,238 ¥ 183,163 ¥ 21,386,156 At September 30, 2023: Amortized Gross unrealized gains Gross unrealized losses Fair value (in millions) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥ 24,004,739 ¥ 6,628 ¥ 204,887 ¥ 23,806,480 Japanese prefectural and municipal bonds 1,448,520 529 13,053 1,435,996 Foreign government and official institution bonds 3,321,914 1,887 176,360 3,147,441 Corporate bonds 993,368 8,886 5,093 997,161 Residential mortgage-backed securities 1,190,027 630 335 1,190,322 Asset-backed securities 1,327,319 10,448 4,196 1,333,571 Other debt securities 469,145 1,610 8,947 461,808 Total ¥ 32,755,032 ¥ 30,618 ¥ 412,871 ¥ 32,372,779 Held-to-maturity debt securities: Japanese national government and Japanese government agency bonds ¥ 15,278,373 ¥ 9,192 ¥ 125,726 ¥ 15,161,839 Japanese prefectural and municipal bonds 1,742,822 69 25,501 1,717,390 Corporate bonds 83,270 70 216 83,124 Residential mortgage-backed securities 4,785,680 — 333,444 4,452,236 Asset-backed securities 2,766,881 883 24,266 2,743,498 Total ¥ 24,657,026 ¥ 10,214 ¥ 509,153 ¥ 24,158,087
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 Fair value Fair value (in millions) Due in one year or less ¥ 2,855,090 ¥ 2,860,151 ¥ 21,295,450 Due from one year to five years 9,204,124 9,180,648 6,105,423 Due from five years to ten years 6,823,850 6,685,577 1,700,974 Due after ten years 5,773,962 5,431,711 3,270,932 Total ¥ 24,657,026 ¥ 24,158,087 ¥ 32,372,779
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, 2023 and September 30, 2023 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, 2023: 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 ¥ 7,644,337 ¥ 8,066 ¥ 2,105,210 ¥ 115,703 ¥ 9,749,547 ¥ 123,769 438 Japanese prefectural and municipal bonds 962,234 1,781 711,896 14,091 1,674,130 15,872 723 Foreign government and official institution bonds 858,970 18,677 1,436,798 89,695 2,295,768 108,372 118 Corporate bonds 331,411 1,800 249,088 1,177 580,499 2,977 256 Residential mortgage-backed securities 166,778 5 522,774 436 689,552 441 15 Asset-backed securities 310,388 4,170 39,806 194 350,194 4,364 32 Other debt securities 48,804 1,266 47,886 5,576 96,690 6,842 28 Total ¥ 10,322,922 ¥ 35,765 ¥ 5,113,458 ¥ 226,872 ¥ 15,436,380 ¥ 262,637 1,610 Less than 12 months 12 months or more Total At September 30, 2023: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale debt securities: Japanese national government and Japanese government agency bonds ¥15,513,132 ¥ 11,509 ¥ 2,281,507 ¥ 193,378 ¥ 17,794,639 ¥ 204,887 465 Japanese prefectural and municipal bonds 632,087 2,471 547,689 10,582 1,179,776 13,053 618 Foreign government and official institution bonds 414,975 16,286 2,044,973 160,074 2,459,948 176,360 112 Corporate bonds 223,396 1,646 379,043 3,447 602,439 5,093 298 Residential mortgage-backed securities 50,483 2 310,171 333 360,654 335 10 Asset-backed securities 254,849 3,647 71,708 549 326,557 4,196 26 Other debt securities 342,014 2,186 58,531 6,761 400,545 8,947 88 Total ¥ 17,430,936 ¥ 37,747 ¥ 5,693,622 ¥ 375,124 ¥ 23,124,558 ¥ 412,871 1,617
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, 2022 and 2023. Six months ended 2022 2023 (in millions) Net gains (losses) recognized during the period (1) ¥ (203,007) ¥ 687,966 Less: Net gains (losses) recognized during the period on equity securities sold during the period (214) 19,195 Net unrealized gains (losses) recognized during the reporting period still held at the reporting date ¥ (202,793) ¥ 668,771 Note: (1) Included in Investment securities gains (losses)—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, 2023 and September 30, 2023. March 31, September 30, (in millions) Measurement alternative balance ¥ 381,928 ¥ 471,832
Related Adjustments for Nonmarketable Equity Securities	The related adjustments for these securities during the six months ended September 30, 2022 and 2023 were as follows: Six months ended 2022 2023 (in millions) Measurement alternative impairment losses (1)(4) ¥ (5,155) ¥ (8,187) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ (440) ¥ (1,567) Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ 5,090 ¥ 783 Notes: (1) Included in Investment securities gains (losses)—net. (2) Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer. (3) The MUFG Group applied measurement alternative 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, 2023 and September 30, 2023 were ¥20,151 million and ¥27,784 million, respectively. (5) The cumulative downward changes for observable prices at March 31, 2023 and September 30, 2023 were ¥1,393 million and ¥2,961 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2023 and September 30, 2023 were ¥59,069 million and ¥59,822 million, respectively.

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	6 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Ages of Past Due Loans by Class	The table below presents total outstanding loans and past due analysis by class at March 31, 2023 and September 30, 2023. Past Due At March 31, 2023: 1-3 months Greater Total Current Loans Total Past Due 90 Days and (in millions) Commercial Domestic ¥ 6,599 ¥ 12,485 ¥ 19,084 ¥ 55,519,315 ¥ 87,659 ¥ 55,626,058 ¥ 2,652 Foreign 8,818 33,203 42,021 41,268,228 879,423 42,189,672 12,158 Residential 32,514 11,496 44,010 12,830,845 — 12,874,855 3,342 Card 14,992 26,587 41,579 431,263 — 472,842 — Krungsri 188,802 136,627 325,429 7,457,206 — 7,782,635 — Other 14,241 20,235 34,476 1,375,934 — 1,410,410 — Total ¥ 265,966 ¥ 240,633 ¥ 506,599 ¥ 118,882,791 ¥ 967,082 ¥ 120,356,472 ¥ 18,152 Unearned income, unamortized premiums—net and deferred loan fees—net (401,012) Total ¥ 119,955,460 Past Due At September 30, 2023: 1-3 months Greater Total Current Loans Total Past Due 90 Days and Accruing (in millions) Commercial Domestic ¥ 5,741 ¥ 11,431 ¥ 17,172 ¥ 55,250,944 ¥ 57,876 ¥ 55,325,992 ¥ 2,510 Foreign 1,339 38,029 39,368 44,944,455 997,123 45,980,946 13,183 Residential 34,298 12,879 47,177 12,550,728 — 12,597,905 4,396 Card 15,815 27,762 43,577 434,805 — 478,382 — Krungsri 224,565 167,420 391,985 8,355,723 — 8,747,708 — Other 18,416 29,673 48,089 1,660,317 — 1,708,406 — Total ¥ 300,174 ¥ 287,194 ¥ 587,368 ¥ 123,196,972 ¥ 1,054,999 ¥ 124,839,339 ¥ 20,089 Unearned income, unamortized premiums—net and deferred loan fees—net (436,827) Total ¥ 124,402,512
Nonaccrual Loans by Class	The information on nonaccrual loans by class at March 31, 2023 and September 30, 2023 are shown below: Recorded Loan Balance March 31, 2023: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 401,836 ¥ 99,657 Foreign 246,675 65,242 Residential 47,910 3,962 Card 67,159 — Krungsri 211,705 3,286 Other 29,848 5 Total ¥ 1,005,133 ¥ 172,152 Recorded Loan Balance September 30, 2023: Nonaccrual Loans (1) Nonaccrual Loans Not Requiring an Allowance for Credit Losses (2) (in millions) Commercial Domestic ¥ 336,679 ¥ 103,914 Foreign 202,085 50,016 Residential 44,874 4,177 Card 70,093 — Krungsri 255,876 3,286 Other 33,791 9 Total ¥ 943,398 ¥ 161,402 Notes: (1) Nonaccrual loans in the above table do not include loans held for sale of ¥9,205 million and ¥14,384 million at March 31, 2023 and September 30, 2023, respectively. (2) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans’ effective interest rate, or the fair value of the collateral if the loan is a collateral-dependent loan. The following table shows information regarding recognized interest income on nonaccrual loans for the six months ended September 30, 2022 and 2023: September 30, 2022 (in millions) Commercial Domestic ¥ 10,033 Foreign 2,247 Residential 378 Card 9 MUAH 51 Krungsri 3,250 Other 2,084 Total ¥ 18,052 September 30, 2023 (in millions) Commercial Domestic ¥ 2,209 Foreign 3,534 Residential 276 Card 8 Krungsri 4,641 Other 1,549 Total ¥ 12,217
TDRs by Class	The following table summarizes the MUFG Group’s TDRs by class for the six months ended September 30, 2022: Six months ended September 30, 2022 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 ¥ 37,312 ¥ 37,312 ¥ 1,830 Foreign 17,057 17,057 — Residential (1)(3) 8,697 8,697 95 Card (2)(3) 11,408 10,934 1,410 MUAH (2)(3) 8,216 8,216 — Krungsri (2)(3) 48,899 48,899 1,827 Other (2) 7,638 7,638 1,202 Total ¥ 139,227 ¥ 138,753 ¥ 6,364 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUAH, Krungsri and Other segments include accrual and nonaccrual loans. (3) For the six months ended September 30, 2022, 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 MUAH segment. The following table summarizes the MUFG Group’s loan modifications that were made to borrowers experiencing financial difficulty by class for the six months ended September 30, 2023: Six months ended September 30, 2023: Loan Modifications Made to Borrowers Experiencing Financial Difficulty Loans Modified within 12 months of Subsequent Default Amortized Cost Basis at the Period End Percentage of Total Class of Loans Amortized Cost Basis at the Period End (in millions, except percentages) Commercial (1) Domestic Interest rate reduction ¥ 2,909 0.01 % ¥ — Term extension 146,968 0.27 2,676 Combination of interest rate reduction and term extension 4,774 0.01 — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Foreign Interest rate reduction ¥ — — % ¥ — Term extension 101,054 0.22 — Combination of interest rate reduction and term extension — — — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Residential (1) Interest rate reduction ¥ — — % ¥ — Term extension 8,491 0.07 60 Combination of interest rate reduction and term extension — — — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Card (2) Interest rate reduction ¥ — — % ¥ — Term extension — — — Combination of interest rate reduction and term extension 12,480 2.61 1,472 Combination of term extension and principal forgiveness 121 0.03 1 All other modifications and combinations — — — Krungsri (2) Interest rate reduction ¥ 389 0.00 % ¥ 113 Term extension 193,354 2.21 1,854 Combination of interest rate reduction and term extension 2,134 0.02 122 Combination of term extension and principal forgiveness 464 0.01 834 All other modifications and combinations 884 0.01 142 Other (2) Interest rate reduction ¥ 250 0.01 % ¥ 185 Term extension 1,569 0.09 290 Combination of interest rate reduction and term extension 149 0.01 — Combination of term extension and principal forgiveness — — — All other modifications and combinations — — — Notes: (1) The modified loans for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) The modified loans for the Card, Krungsri and Other segments include accrual and nonaccrual loans. The following table provides the financial effect of the modifications made to borrowers experiencing financial difficulty by class for the six months ended September 30, 2023: Six months ended September 30, 2023: Financial Effect Commercial Domestic Interest rate reduction Reduced weighted-average contractual interest rate by 0.06% Term extension Added a weighted-average 0.8 years to the life of loans. Foreign Term extension Added a weighted-average 0.5 years to the life of loans. Residential Term extension Added a weighted-average 1.3 years to the life of loans. Card Interest rate reduction Reduced weighted-average contractual interest rate by 15.24%. Term extension Added a weighted-average 3.0 years to the life of loans. Principal forgiveness Reduced the principal balance of the loans by ¥404 million. Krungsri Interest rate reduction Reduced weighted-average contractual interest rate by 1.24%. Term extension Added a weighted-average 1.7 years to the life of loans. Principal forgiveness Reduced the principal balance of the loans by ¥484 million. Other Interest rate reduction Reduced weighted-average contractual interest rate by 3.40%. Term extension Added a weighted-average 3.0 years to the life of loans. The following table provides the performance of loans that have been modified in the last 12 months to borrowers experiencing financial difficulty by class for the six months ended September 30, 2023: Six months ended September 30, 2023: Payment Status (Amortized Cost Basis at the Period End) Current 1-3 months Past Due Greater Than 3 months Past Due (in millions) Commercial (1) Domestic ¥ 266,915 ¥ 305 ¥ 470 Foreign 108,618 — — Residential (1) 16,094 948 214 Card (2) 16,816 4,270 1,973 Krungsri (2) 298,694 10,727 10,783 Other (2) 4,068 591 188 Total ¥ 711,205 ¥ 16,841 ¥ 13,628 Notes: (1) The modified loans for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) The modified loans for the Card, Krungsri and Other segments include accrual and nonaccrual loans.
Credit Quality Indicators of Loans by Class	Credit quality indicators of loans and fiscal year of origination by class at March 31, 2023 are shown below: Term Loans Revolving Revolving Total (1) At March 31, 2023: 2022 2021 2020 2019 2018 Prior (in millions) Commercial: ¥ 32,957,651 ¥ 10,100,587 ¥ 8,626,319 ¥ 5,653,421 ¥ 4,385,807 ¥ 9,366,641 ¥ 25,743,172 ¥ 15,050 ¥ 96,848,648 Domestic 20,132,474 6,099,692 6,675,895 4,002,329 3,214,528 7,406,590 8,006,891 — 55,538,399 Normal 19,867,845 5,957,659 6,472,135 3,823,755 3,126,146 6,722,981 7,722,379 — 53,692,900 Close Watch 222,202 124,499 172,270 114,534 74,635 567,514 262,686 — 1,538,340 Likely to become Bankrupt or Legally/Virtually Bankrupt 42,427 17,534 31,490 64,040 13,747 116,095 21,826 — 307,159 Foreign 12,825,177 4,000,895 1,950,424 1,651,092 1,171,279 1,960,051 17,736,281 15,050 41,310,249 Normal 12,508,547 3,931,278 1,857,934 1,577,120 1,083,934 1,824,977 17,540,822 15,050 40,339,662 Close Watch 262,388 34,656 60,637 50,210 71,966 79,450 174,436 — 733,743 Likely to become Bankrupt or Legally/Virtually Bankrupt 54,242 34,961 31,853 23,762 15,379 55,624 21,023 — 236,844 Residential ¥ 688,000 ¥ 747,161 ¥ 607,237 ¥ 919,359 ¥ 811,469 ¥ 9,077,669 ¥ 23,960 ¥ — ¥ 12,874,855 Accrual 687,800 747,121 607,047 918,781 810,933 9,034,589 22,093 — 12,828,364 Nonaccrual 200 40 190 578 536 43,080 1,867 — 46,491 Card ¥ 12 ¥ 147 ¥ 240 ¥ 239 ¥ 181 ¥ 587 ¥ 403,687 ¥ 67,749 ¥ 472,842 Accrual 1 7 10 8 9 37 391,237 14,374 405,683 Nonaccrual 11 140 230 231 172 550 12,450 53,375 67,159 Krungsri ¥ 1,824,628 ¥ 1,046,959 ¥ 654,933 ¥ 692,616 ¥ 515,731 ¥ 605,053 ¥ 2,427,923 ¥ 14,792 ¥ 7,782,635 Performing 1,689,034 956,470 570,865 553,616 406,258 459,322 2,292,418 — 6,927,983 Under-Performing 108,770 66,555 67,504 111,435 85,928 98,103 104,652 — 642,947 Non-Performing 26,824 23,934 16,564 27,565 23,545 47,628 30,853 14,792 211,705 Other ¥ 551,560 ¥ 190,786 ¥ 108,148 ¥ 48,867 ¥ 19,875 ¥ 80,252 ¥ 410,922 ¥ — ¥ 1,410,410 Accrual 549,274 187,638 106,522 47,235 17,832 75,726 396,334 — 1,380,561 Nonaccrual 2,286 3,148 1,626 1,632 2,043 4,526 14,588 — 29,849 Credit quality indicators of loans and fiscal year of origination by class at September 30, 2023, and gross charge-offs for the six months ended September 30, 2023 are shown below: Term Loans Revolving Revolving Total (1) At September 30, 2023: 2023 2022 2021 2020 2019 Prior (in millions) Commercial: ¥ 24,683,463 ¥ 17,014,732 ¥ 8,183,201 ¥ 7,037,786 ¥ 4,794,778 ¥ 11,556,449 ¥ 26,933,190 ¥ 48,340 ¥ 100,251,939 Domestic 14,475,541 8,962,771 5,386,826 5,862,545 3,592,584 9,224,351 7,763,498 — 55,268,116 Normal 14,320,810 8,821,506 5,254,183 5,694,307 3,446,184 8,559,902 7,518,069 — 53,614,961 Close Watch 146,705 126,472 122,444 140,338 80,540 551,639 224,428 — 1,392,566 Likely to become Bankrupt or Legally/Virtually Bankrupt 8,026 14,793 10,199 27,900 65,860 112,810 21,001 — 260,589 Gross charge-offs 1,896 22,519 1,213 918 583 460 865 — 28,454 Foreign 10,207,922 8,051,961 2,796,375 1,175,241 1,202,194 2,332,098 19,169,692 48,340 44,983,823 Normal 9,976,734 7,886,252 2,769,053 1,131,884 1,070,727 2,144,663 18,851,641 48,340 43,879,294 Close Watch 179,305 145,486 27,233 25,793 113,147 122,666 303,862 — 917,492 Likely to become Bankrupt or Legally/Virtually Bankrupt 51,883 20,223 89 17,564 18,320 64,769 14,189 — 187,037 Gross charge-offs 176 330 959 401 149 — 6,474 — 8,489 Residential ¥ 244,078 ¥ 673,841 ¥ 731,671 ¥ 591,262 ¥ 892,586 ¥ 9,442,305 ¥ 22,162 ¥ — ¥ 12,597,905 Accrual 244,072 673,649 731,530 591,025 891,988 9,401,590 20,257 — 12,554,111 Nonaccrual 6 192 141 237 598 40,715 1,905 — 43,794 Gross charge-offs — — — 6 18 435 — — 459 Card ¥ — ¥ 82 ¥ 194 ¥ 266 ¥ 237 ¥ 709 ¥ 406,199 ¥ 70,695 ¥ 478,382 Accrual — 4 6 8 7 40 393,455 14,769 408,289 Nonaccrual — 78 188 258 230 669 12,744 55,926 70,093 Gross charge-offs 6 17 62 51 49 82 4,047 5,844 10,158 Krungsri ¥ 1,193,301 ¥ 1,728,989 ¥ 925,488 ¥ 560,513 ¥ 574,963 ¥ 964,264 ¥ 2,784,735 ¥ 15,455 ¥ 8,747,708 Performing 1,130,458 1,534,215 822,929 478,441 451,429 726,205 2,616,328 — 7,760,005 Under-Performing 52,188 135,884 72,846 65,469 96,467 172,772 136,201 — 731,827 Non-Performing 10,655 58,890 29,713 16,603 27,067 65,287 32,206 15,455 255,876 Gross charge-offs 358 11,594 11,552 6,355 6,036 9,473 14,649 — 60,017 Other ¥ 461,916 ¥ 381,708 ¥ 158,192 ¥ 82,994 ¥ 40,010 ¥ 117,397 ¥ 466,189 ¥ — ¥ 1,708,406 Accrual 461,455 375,823 155,147 81,668 38,720 110,971 450,831 — 1,674,615 Nonaccrual 461 5,885 3,045 1,326 1,290 6,426 15,358 — 33,791 Gross charge-offs 228 5,976 3,602 1,082 557 1,571 2,913 — 15,929 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.
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, 2022 and 2023 are shown below: Six months ended September 30, 2022: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 934,086 ¥ 69,887 ¥ 40,768 ¥ 30,365 ¥ 322,386 ¥ 73,209 ¥ 1,470,701 Provision for (reversal of) credit losses (164,085) (5,867) 10,326 4,792 39,380 17,669 (97,785) Charge-offs 130,524 110 8,867 10,083 38,792 22,991 211,367 Recoveries collected 6,096 11 431 2,270 12,028 8,989 29,825 Net charge-offs 124,428 99 8,436 7,813 26,764 14,002 181,542 Other (1) 12,307 — — 3,191 40,167 10,198 65,863 Balance at end of period ¥ 657,880 ¥ 63,921 ¥ 42,658 ¥ 30,535 ¥ 375,169 ¥ 87,074 ¥ 1,257,237 Six months ended September 30, 2023: Commercial Residential Card Krungsri Other (2) Total (in millions) Allowance for credit losses: Balance at beginning of period ¥ 719,589 ¥ 59,747 ¥ 42,469 ¥ 358,031 ¥ 93,062 ¥ 1,272,898 Provision for (reversal of) credit losses (17,974) 433 10,255 47,303 21,755 61,772 Charge-offs 36,943 459 10,158 60,017 15,929 123,506 Recoveries collected 9,720 2 393 13,959 8,491 32,565 Net charge-offs 27,223 457 9,765 46,058 7,438 90,941 Other (1)(3) 1,580 — (7,666) 45,955 11,159 51,028 Balance at end of period ¥ 675,972 ¥ 59,723 ¥ 35,293 ¥ 405,231 ¥ 118,538 ¥ 1,294,757 Notes: (1) Other is principally comprised of gains or losses from foreign exchange translation. (2) For the six months ended September 30, 2023, the beginning balance and the ending balance of the Other segment in the above table include the allowance for credit losses of ¥3,428 million and ¥1,151 million, respectively, which were previously included in the MUAH segment. (3) For the six months ended September 30, 2023, Other includes the change in accounting principle related to the recognition and measurement of TDRs which was adopted on April 1, 2023. As a result of accumulating the amounts included in each segment amount, the Total includes negative of ¥18,869 million.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2022 and 2023: Six months ended 2022 2023 (in millions) Balance at beginning of period Goodwill (1)(3) ¥ 1,118,889 ¥ 889,524 Accumulated impairment losses (1)(3) (723,492) (592,752) Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank (2) (91,786) — 303,611 296,772 Goodwill acquired during the six months (4) — 59,127 Foreign currency translation adjustments and other 54,093 22,424 Balance at end of period Goodwill 1,172,982 971,075 Accumulated impairment losses (723,492) (592,752) Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank (2) ¥ (108,468) ¥ — ¥ 341,022 ¥ 378,323 Notes: (1) Goodwill originally recognized of ¥1,900,019 million, which has been fully impaired before April 1, 2022, 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 condensed consolidated balance sheets at September 30, 2022. See Note 2 for more information. (3) For the balance at April 1, 2023, the Goodwill and Accumulated impairment losses in the above table exclude the goodwill and accumulated impairment losses previously recorded for MUFG Union Bank, which was sold during the fiscal year ended March 31, 2023. See Note 2 for further information. (4) Goodwill acquired during the six months ended September 30, 2023 mainly relates to the acquisition of business in the Global Commercial Banking Business Group, including the acquisition of HC Philippines (See Note 2).
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, 2023 and September 30, 2023: March 31, September 30, (in millions) Intangible assets subject to amortization: Software ¥ 833,297 ¥ 887,780 Customer relationships 232,911 241,517 Core deposit intangibles 50,176 50,862 Trade names 38,771 39,647 Other 11,110 13,215 Total 1,166,265 1,233,021 Intangible assets not subject to amortization: Other 7,958 7,873 Total ¥ 1,174,223 ¥ 1,240,894

Lease Transactions (Tables)

Lease Transactions (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2022 and September 30, 2023: September 30, September 30, (in millions) Sales type and direct financing leases: Finance income on net investment ¥ 61,812 ¥ 68,780 Operating leases: Lease income 1,799 3,937 Total ¥ 63,611 ¥ 72,717

Pledged Assets and Collateral (

Pledged Assets and Collateral (Tables)	6 Months Ended
	Sep. 30, 2023
Financial Instruments Pledged as Collateral [Abstract]
Assets Mortgaged Pledged or Otherwise Subject to Lien	At September 30, 2023, assets mortgaged, pledged, or otherwise subject to lien were as follows: September 30, 2023 (in millions) Trading account securities ¥ 7,820,667 Investment securities 23,430,643 Loans 12,197,635 Other 22,929 Total ¥ 43,471,874
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, 2023 (in millions) Deposits ¥ 14,911 Payables under repurchase agreements and securities lending transactions 20,906,911 Other short-term borrowings and long-term debt 22,473,103 Other 76,949 Total ¥ 43,471,874

Severance Indemnities and Pen_2

Severance Indemnities and Pension Plans (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2022 and 2023: Six months ended September 30, Domestic subsidiaries Foreign offices and subsidiaries 2022 2023 2022 2023 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 ¥ 20,580 ¥ 17,788 ¥ 8,281 ¥ 56 ¥ 6,141 ¥ 30 Interest cost on projected benefit obligation 7,131 10,288 7,667 340 4,345 594 Expected return on plan assets (42,328) (41,218) (18,381) (1,338) (5,574) (732) Amortization of net actuarial loss (gain) 346 925 3,896 (77) 837 584 Amortization of prior service cost (650) (973) (1,607) (212) (435) (208) Loss (gain) on settlements and curtailment (2,121) (6,393) — — 974 — Net periodic benefit cost (income) ¥ (17,042) ¥ (19,583) ¥ (144) ¥ (1,231) ¥ 6,288 ¥ 268

Offsetting of Derivatives, Re_2

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2023: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 12,911 ¥ — ¥ 12,911 ¥ (9,902) ¥ (690) ¥ 2,319 Receivables under resale agreements 16,152 (2,093) 14,059 (13,391) (32) 636 Receivables under securities borrowing transactions 4,630 (74) 4,556 (4,478) — 78 Total ¥ 33,693 ¥ (2,167) ¥ 31,526 ¥ (27,771) ¥ (722) ¥ 3,033 Financial liabilities: Derivative liabilities ¥ 13,833 ¥ — ¥ 13,833 ¥ (9,668) ¥ (1,489) ¥ 2,676 Payables under repurchase agreements 42,172 (2,040) 40,132 (39,232) (76) 824 Payables under securities lending transactions 1,212 (74) 1,138 (1,108) (18) 12 Obligations to return securities received as collateral 6,892 — 6,892 (1,975) — 4,917 Total ¥ 64,109 ¥ (2,114) ¥ 61,995 ¥ (51,983) ¥ (1,583) ¥ 8,429 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 September 30, 2023: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 18,554 ¥ — ¥ 18,554 ¥ (14,849) ¥ (1,100) ¥ 2,605 Receivables under resale agreements 19,029 (2,659) 16,370 (15,670) (9) 691 Receivables under securities borrowing transactions 5,166 (81) 5,085 (4,811) — 274 Total ¥ 42,749 ¥ (2,740) ¥ 40,009 ¥ (35,330) ¥ (1,109) ¥ 3,570 Financial liabilities: Derivative liabilities ¥ 20,105 ¥ — ¥ 20,105 ¥ (14,364) ¥ (2,404) ¥ 3,337 Payables under repurchase agreements 35,529 (2,569) 32,960 (31,587) (124) 1,249 Payables under securities lending transactions 1,098 (81) 1,017 (986) (11) 20 Obligations to return securities received as collateral 6,895 — 6,895 (1,437) — 5,458 Total ¥ 63,627 ¥ (2,650) ¥ 60,977 ¥ (48,374) ¥ (2,539) ¥ 10,064
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, 2023: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 12,911 ¥ — ¥ 12,911 ¥ (9,902) ¥ (690) ¥ 2,319 Receivables under resale agreements 16,152 (2,093) 14,059 (13,391) (32) 636 Receivables under securities borrowing transactions 4,630 (74) 4,556 (4,478) — 78 Total ¥ 33,693 ¥ (2,167) ¥ 31,526 ¥ (27,771) ¥ (722) ¥ 3,033 Financial liabilities: Derivative liabilities ¥ 13,833 ¥ — ¥ 13,833 ¥ (9,668) ¥ (1,489) ¥ 2,676 Payables under repurchase agreements 42,172 (2,040) 40,132 (39,232) (76) 824 Payables under securities lending transactions 1,212 (74) 1,138 (1,108) (18) 12 Obligations to return securities received as collateral 6,892 — 6,892 (1,975) — 4,917 Total ¥ 64,109 ¥ (2,114) ¥ 61,995 ¥ (51,983) ¥ (1,583) ¥ 8,429 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 September 30, 2023: Financial instruments Cash collateral received/pledged (in billions) Financial assets: Derivative assets ¥ 18,554 ¥ — ¥ 18,554 ¥ (14,849) ¥ (1,100) ¥ 2,605 Receivables under resale agreements 19,029 (2,659) 16,370 (15,670) (9) 691 Receivables under securities borrowing transactions 5,166 (81) 5,085 (4,811) — 274 Total ¥ 42,749 ¥ (2,740) ¥ 40,009 ¥ (35,330) ¥ (1,109) ¥ 3,570 Financial liabilities: Derivative liabilities ¥ 20,105 ¥ — ¥ 20,105 ¥ (14,364) ¥ (2,404) ¥ 3,337 Payables under repurchase agreements 35,529 (2,569) 32,960 (31,587) (124) 1,249 Payables under securities lending transactions 1,098 (81) 1,017 (986) (11) 20 Obligations to return securities received as collateral 6,895 — 6,895 (1,437) — 5,458 Total ¥ 63,627 ¥ (2,650) ¥ 60,977 ¥ (48,374) ¥ (2,539) ¥ 10,064

Repurchase Agreements and Sec_2

Repurchase Agreements and Securities Lending Transactions Accounted for as Secured Borrowings (Tables)	6 Months Ended
	Sep. 30, 2023
Disclosure of Repurchase Agreements [Abstract]
Gross Obligations by Remaining Contractual Maturity and Class of Collateral Pledged	March 31, 2023 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 8,593 ¥ 23,546 ¥ 8,393 ¥ 1,640 ¥ 42,172 Payables under securities lending transactions 947 191 5 69 1,212 Obligations to return securities received as collateral 5,516 642 404 330 6,892 Total ¥ 15,056 ¥ 24,379 ¥ 8,802 ¥ 2,039 ¥ 50,276 September 30, 2023 Remaining Contractual Maturity Overnight and open 30 days or less 31-90 days Over 90 days Total (in billions) Payables under repurchase agreements ¥ 11,525 ¥ 12,729 ¥ 7,680 ¥ 3,595 ¥ 35,529 Payables under securities lending transactions 1,015 — 6 77 1,098 Obligations to return securities received as collateral 6,233 256 127 279 6,895 Total ¥ 18,773 ¥ 12,985 ¥ 7,813 ¥ 3,951 ¥ 43,522
Secured Borrowing by the Class of Collateral Pledged	Secured borrowing by the class of collateral pledged at March 31, 2023 and September 30, 2023 was as follows: March 31, 2023 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 ¥ 13,280 ¥ 577 ¥ 3,956 ¥ 17,813 Foreign government and official institution bonds 17,618 9 1,122 18,749 Corporate bonds 657 70 400 1,127 Residential mortgage-backed securities 9,650 — — 9,650 Other debt securities 552 — 46 598 Marketable equity securities 367 556 1,368 2,291 Other 48 — — 48 Total ¥ 42,172 ¥ 1,212 ¥ 6,892 ¥ 50,276 September 30, 2023 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 ¥ 12,686 ¥ 254 ¥ 4,013 ¥ 16,953 Foreign government and official institution bonds 13,357 7 965 14,329 Corporate bonds 908 77 354 1,339 Residential mortgage-backed securities 7,563 — — 7,563 Other debt securities 454 — 43 497 Marketable equity securities 534 735 1,520 2,789 Other 27 25 — 52 Total ¥ 35,529 ¥ 1,098 ¥ 6,895 ¥ 43,522

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Sep. 30, 2023
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 other comprehensive income (loss) (“Accumulated OCI”), net of tax and net of noncontrolling interests, for the six months ended September 30, 2022 and 2023: Six months ended 2022 2023 (in millions) Accumulated other comprehensive income (loss), net of taxes: Net unrealized losses on investment securities: Balance at beginning of period ¥ (674,230) ¥ (883,466) Net change during the period (218,267) (157,542) Balance at end of period ¥ (892,497) ¥ (1,041,008) Net debt valuation adjustments: Balance at beginning of period ¥ (14,538) ¥ 3,268 Net change during the period 45,485 (22,260) Balance at end of period ¥ 30,947 ¥ (18,992) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Balance at beginning of period ¥ 5,969 ¥ 594 Net change during the period (21,686) 13 Balance at end of period ¥ (15,717) ¥ 607 Defined benefit plans: Balance at beginning of period ¥ 29,124 ¥ 8,304 Net change during the period (16,948) 48,926 Balance at end of period ¥ 12,176 ¥ 57,230 Foreign currency translation adjustments: Balance at beginning of period ¥ 880,708 ¥ 1,715,492 Net change during the period 1,409,554 971,678 Balance at end of period ¥ 2,290,262 ¥ 2,687,170 Balance at end of period ¥ 1,425,171 ¥ 1,685,007
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, 2022 and 2023: Six months ended September 30, 2022 2023 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 losses on investment securities ¥ (534,655) ¥ 132,963 ¥ (401,692) ¥ (147,389) ¥ 23,204 ¥ (124,185) Reclassification adjustment for losses (gains) included in net income (loss) before attribution of noncontrolling interests 296,064 (88,081) 207,983 (51,965) 14,020 (37,945) Net change (238,591) 44,882 (193,709) (199,354) 37,224 (162,130) Net unrealized gains (losses) on investment securities attributable to noncontrolling interests 24,558 (4,588) Net unrealized losses on investment securities attributable to Mitsubishi UFJ Financial Group (218,267) (157,542) Net debt valuation adjustments: Net debt valuation adjustments 65,470 (20,047) 45,423 (32,387) 9,917 (22,470) Reclassification adjustment for losses included in net income (loss) before attribution of noncontrolling interests 89 (27) 62 302 (92) 210 Net change 65,559 (20,074) 45,485 (32,085) 9,825 (22,260) Net debt valuation adjustments attributable to noncontrolling interests — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group 45,485 (22,260) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains (losses) on derivatives qualifying for cash flow hedges (22,892) 6,571 (16,321) 3,029 (599) 2,430 Reclassification adjustment for gains included in net income (loss) before attribution of noncontrolling interests (6,701) 1,662 (5,039) (3,013) 598 (2,415) Net change (29,593) 8,233 (21,360) 16 (1) 15 Net unrealized gains on derivatives qualifying for cash flow hedges attributable to noncontrolling interests 326 2 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group (21,686) 13 Defined benefit plans: Defined benefit plans (23,354) 6,682 (16,672) 75,036 (22,992) 52,044 Reclassification adjustment for gains included in net income (loss) before attribution of noncontrolling interests (443) 250 (193) (4,612) 1,533 (3,079) Net change (23,797) 6,932 (16,865) 70,424 (21,459) 48,965 Defined benefit plans attributable to noncontrolling interests 83 39 Defined benefit plans attributable to Mitsubishi UFJ Financial Group (16,948) 48,926 Foreign currency translation adjustments: Foreign currency translation adjustments 1,654,830 (196,704) 1,458,126 1,200,624 (146,735) 1,053,889 Reclassification adjustment for gains included in net income (loss) before attribution of noncontrolling interests (12,257) 3,753 (8,504) (4,231) 1,296 (2,935) Net change 1,642,573 (192,951) 1,449,622 1,196,393 (145,439) 1,050,954 Foreign currency translation adjustments attributable to noncontrolling interests 40,068 79,276 Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group 1,409,554 971,678 Other comprehensive income attributable to Mitsubishi UFJ Financial Group ¥ 1,198,138 ¥ 840,815
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 operations for the six months ended September 30, 2022 and 2023: Six months ended 2022 2023 Details of Accumulated OCI components Amount reclassified out of Accumulated OCI Line items in the consolidated statements of operations (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale debt securities ¥ (9,738) ¥ (52,655) Investment securities gains (losses)—net Impairment losses on investment securities 299,281 2 Investment securities gains (losses)—net Other 6,521 688 296,064 (51,965) Total before tax (88,081) 14,020 Income tax expense (benefit) ¥ 207,983 ¥ (37,945) Net of tax Net debt valuation adjustments ¥ 89 ¥ 302 Equity in earnings of equity method investees—net 89 302 Total before tax (27) (92) Income tax expense (benefit) ¥ 62 ¥ 210 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ (5,173) ¥ — Interest income on Loans, including fees Foreign exchange contracts (1,528) (3,013) Interest expense on Long-term debt or Foreign exchange losses—net (6,701) (3,013) Total before tax 1,662 598 Income tax expense (benefit) ¥ (5,039) ¥ (2,415) Net of tax Defined benefit plans Net actuarial loss (1) ¥ 4,165 ¥ 2,346 Other non-interest expenses Prior service cost (1) (2,469) (1,616) Other non-interest expenses Gain on settlements and curtailment, and other (1) (2,139) (5,342) Other non-interest expenses (443) (4,612) Total before tax 250 1,533 Income tax expense (benefit) ¥ (193) ¥ (3,079) Net of tax Foreign currency translation adjustments ¥ (12,257) ¥ (4,231) Other non-interest income (12,257) (4,231) Total before tax 3,753 1,296 Income tax expense (benefit) ¥ (8,504) ¥ (2,935) Net of tax Total reclassifications for the period ¥ 276,752 ¥ (63,519) Total before tax (82,443) 17,355 Income tax expense (benefit) ¥ 194,309 ¥ (46,164) 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, 2023
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, 2023 and September 30, 2023: Notional amounts (1) March 31, September 30, 2023 (in trillions) Interest rate contracts ¥ 1,625.6 ¥ 1,742.9 Foreign exchange contracts 307.4 322.4 Equity contracts 5.3 6.0 Commodity contracts 0.1 0.2 Credit derivatives 11.5 6.7 Other 3.2 3.3 Total ¥ 1,953.1 ¥ 2,081.5 Note: (1) Includes both written and purchased positions.
Fair Value Information on Derivative Instruments Recorded on 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, 2023 and September 30, 2023: Fair value of derivative instruments March 31, 2023 (1)(5) September 30, 2023 (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) (in billions) Derivative assets: Interest rate contracts ¥ 7,445 ¥ — ¥ 7,445 ¥ 11,151 ¥ — ¥ 11,151 Foreign exchange contracts 5,276 5 5,281 7,176 8 7,184 Equity contracts 90 — 90 150 — 150 Commodity contracts 10 — 10 19 — 19 Credit derivatives 80 — 80 50 — 50 Other (6) 5 — 5 — — — Total derivative assets ¥ 12,906 ¥ 5 ¥ 12,911 ¥ 18,546 ¥ 8 ¥ 18,554 Derivative liabilities: Interest rate contracts ¥ 8,697 ¥ — ¥ 8,697 ¥ 12,809 ¥ — ¥ 12,809 Foreign exchange contracts 5,018 — 5,018 7,202 — 7,202 Equity contracts 128 — 128 125 — 125 Commodity contracts 10 — 10 19 — 19 Credit derivatives 90 — 90 72 — 72 Other (6) (110) — (110) (122) — (122) Total derivative liabilities ¥ 13,833 ¥ — ¥ 13,833 ¥ 20,105 ¥ — ¥ 20,105 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, 2023. (6) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Loans, Deposits and Long-term debt.
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 operations for the six months ended September 30, 2022 and 2023: 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, 2022: Interest rate contracts ¥ — ¥ 64 ¥ 64 Foreign exchange contracts (168) — (168) Equity contracts — (24) (24) Credit derivatives — (2) (2) Other (1) (8) 23 15 Total ¥ (176) ¥ 61 ¥ (115) Six months ended September 30, 2023: Interest rate contracts ¥ — ¥ (219) ¥ (219) Foreign exchange contracts (385) — (385) Equity contracts — (268) (268) Credit derivatives — (20) (20) Other (1) (8) (32) (40) Total ¥ (393) ¥ (539) ¥ (932) 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	The table below summarizes certain information regarding protection sold through credit derivatives as of March 31, 2023 and September 30, 2023: Protection sold Maximum potential/Notional amount by expiration period Fair value At March 31, 2023: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 616,504 ¥ 2,222,393 ¥ 529,796 ¥ 3,368,693 ¥ (30,117) Non-investment grade 163,982 313,135 48,177 525,294 13,477 Total 780,486 2,535,528 577,973 3,893,987 (16,640) Index and basket credit default swaps : Investment grade (2) — 217,259 1,596 218,855 (1,266) Non-investment grade 37,359 599,638 6,200 643,197 (7,121) Not rated — 435,452 3,192 438,644 (3,329) Total 37,359 1,252,349 10,988 1,300,696 (11,716) Total credit default swaps sold ¥ 817,845 ¥ 3,787,877 ¥ 588,961 ¥ 5,194,683 ¥ (28,356) Protection sold Maximum potential/Notional amount by expiration period Fair value At September 30, 2023: 1 year or less 1-5 years Over 5 years Total (Asset)/ Liability (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 321,667 ¥ 925,277 ¥ 327,235 ¥ 1,574,179 ¥ (13,488) Non-investment grade 103,022 188,539 21,298 312,859 3,810 Total 424,689 1,113,816 348,533 1,887,038 (9,678) Index and basket credit default swaps : Investment grade (2) 56,000 905,146 18,281 979,427 (9,869) Non-investment grade — — — — — Not rated 2,876 — — 2,876 (12) Total 58,876 905,146 18,281 982,303 (9,881) Total credit default swaps sold ¥ 483,565 ¥ 2,018,962 ¥ 366,814 ¥ 2,869,341 ¥ (19,559) 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.

Obligations Under Guarantees _2

Obligations Under Guarantees and Other Off-balance Sheet Instruments (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2023 and September 30, 2023: March 31, September 30, 2023 (in billions) Standby letters of credit and financial guarantees ¥ 4,975 ¥ 5,087 Performance guarantees 4,179 4,697 Derivative instruments (1)(2) 48,363 53,415 Liabilities of trust accounts 17,139 21,703 Other 85 76 Total ¥ 74,741 ¥ 84,978 Notes: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation. (2) Derivative instruments that are deemed to be included within the definition of guarantees as prescribed in the guidance on guarantees include certain written options and credit default swaps.
Maximum Potential Amount of Future Payments Classified Based Upon Internal Credit Ratings	Presented in the tables below is the maximum potential amount of future payments classified based upon internal credit ratings as of March 31, 2023 and September 30, 2023. 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, 2023: 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 ¥ 4,975 ¥ 4,819 ¥ 78 ¥ 17 ¥ 61 Performance guarantees 4,179 4,066 53 29 31 Total ¥ 9,154 ¥ 8,885 ¥ 131 ¥ 46 ¥ 92 At September 30, 2023: 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 ¥ 5,087 ¥ 4,972 ¥ 88 ¥ 10 ¥ 17 Performance guarantees 4,697 4,598 35 27 37 Total ¥ 9,784 ¥ 9,570 ¥ 123 ¥ 37 ¥ 54 Note: (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, 2023.
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, 2023 and September 30, 2023: March 31, September 30, 2023 (in billions) Commitments to extend credit ¥ 88,631 ¥ 92,387 Commercial letters of credit 871 894 Commitments to make investments 705 712

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2023 and September 30, 2023: Consolidated VIEs Consolidated assets At March 31, 2023: 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 ¥ 7,388,845 ¥ 71,649 ¥ 34,521 ¥ 47,606 ¥ 1,027,862 ¥ 6,185,514 ¥ 21,693 Investment funds 1,331,962 — 46,157 359,777 65,204 — 860,824 Special purpose entities created for structured financing 248,952 — 2,593 8,624 — 135,606 102,129 Repackaged instruments 243,513 7,882 — 167,007 53,617 15,007 — Securitization of the MUFG Group’s assets 10,389,398 — 1,434 — — 10,371,275 16,689 Trust arrangements 8,176,795 — — 833,864 1,514,530 5,828,397 4 Other 62,109 584 3,952 14,606 16,159 2,822 23,986 Total consolidated assets before elimination 27,841,574 80,115 88,657 1,431,484 2,677,372 22,538,621 1,025,325 The amounts eliminated in consolidation (6,739,954) (71,872) (36,626) (63,556) (600,635) (5,940,036) (27,229) Total consolidated assets ¥ 21,101,620 ¥ 8,243 ¥ 52,031 ¥ 1,367,928 ¥ 2,076,737 ¥ 16,598,585 ¥ 998,096 Consolidated liabilities Total Deposits Other short-term borrowings Long-term debt All other liabilities (in millions) Asset-backed conduits ¥ 7,364,030 ¥ — ¥ 5,587,813 ¥ 1,367,234 ¥ 408,983 Investment funds 830,751 — 817,292 7,407 6,052 Special purpose entities created for structured financing 127,768 — — 109,352 18,416 Repackaged instruments 245,829 — — 230,285 15,544 Securitization of the MUFG Group’s assets 10,418,160 — — 10,154,662 263,498 Trust arrangements 8,176,907 6,408,837 840,690 — 927,380 Other 56,902 — 1,456 31,900 23,546 Total consolidated liabilities before elimination 27,220,347 6,408,837 7,247,251 11,900,840 1,663,419 The amounts eliminated in consolidation (16,102,106) (302) (3,696,647) (11,469,378) (935,779) The amount of liabilities with recourse to the general credit of the MUFG Group (10,503,305) (6,408,535) (3,505,172) (25,033) (564,565) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 614,936 ¥ — ¥ 45,432 ¥ 406,429 ¥ 163,075 Consolidated VIEs Consolidated assets At September 30, 2023: Total Cash and due from banks Interest-earning deposits in other banks Trading account assets Investment securities Loans All other (in millions) Asset-backed conduits ¥ 7,732,815 ¥ 77,234 ¥ 30,077 ¥ 68,683 ¥ 969,899 ¥ 6,539,924 ¥ 46,998 Investment funds 1,467,112 901 116,379 327,950 73,117 — 948,765 Special purpose entities created for structured financing 250,614 — 3,293 8,071 — 147,264 91,986 Repackaged instruments 288,371 7,132 — 136,973 129,266 15,000 — Securitization of the MUFG Group’s assets 10,786,948 — 1,431 — — 10,766,601 18,916 Trust arrangements 8,770,532 — — 840,042 1,524,982 6,405,502 6 Other 67,548 499 3,794 24,726 16,249 2,597 19,683 Total consolidated assets before elimination 29,363,940 85,766 154,974 1,406,445 2,713,513 23,876,888 1,126,354 The amounts eliminated in consolidation (7,426,415) (78,356) (92,361) (98,158) (600,372) (6,527,631) (29,537) Total consolidated assets ¥ 21,937,525 ¥ 7,410 ¥ 62,613 ¥ 1,308,287 ¥ 2,113,141 ¥ 17,349,257 ¥ 1,096,817 Consolidated liabilities Total Deposits Other short-term borrowings Long-term debt All other (in millions) Asset-backed conduits ¥ 7,697,001 ¥ — ¥ 5,880,073 ¥ 1,362,328 ¥ 454,600 Investment funds 951,058 — 934,436 8,339 8,283 Special purpose entities created for structured financing 123,698 — — 119,496 4,202 Repackaged instruments 296,297 — — 281,304 14,993 Securitization of the MUFG Group’s assets 10,798,823 — — 10,524,243 274,580 Trust arrangements 8,770,460 6,988,735 850,957 — 930,768 Other 62,254 — 1,173 41,972 19,109 Total consolidated liabilities before elimination 28,699,591 6,988,735 7,666,639 12,337,682 1,706,535 The amounts eliminated in consolidation (16,622,457) (1,337) (3,744,249) (11,935,141) (941,730) The amount of liabilities with recourse to the general credit of the MUFG Group (11,581,012) (6,987,398) (3,882,245) (28,439) (682,930) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 496,122 ¥ — ¥ 40,145 ¥ 374,102 ¥ 81,875 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, 2023 and September 30, 2023: Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At March 31, 2023: Total assets Maximum exposure Total Trading account assets Investment securities Loans All other assets Total All other liabilities (in millions) Asset-backed conduits ¥ 41,001,958 ¥ 8,062,589 ¥ 6,384,079 ¥ 21,719 ¥ 2,205,877 ¥ 4,142,995 ¥ 13,488 ¥ 10,823 ¥ 10,823 Investment funds 55,386,213 4,930,989 3,446,109 262,312 120,436 2,710,177 353,184 27,606 27,606 Special purpose entities created for structured financing 54,543,066 5,864,814 3,907,598 80,382 39,357 3,749,670 38,189 208,100 208,100 Repackaged instruments 9,034,058 4,372,581 4,117,969 944,795 2,641,384 386,793 144,997 2,230 2,230 Other 87,989,676 3,989,548 2,761,087 146,286 7,552 2,523,976 83,273 46,354 46,354 Total ¥ 247,954,971 ¥ 27,220,521 ¥ 20,616,842 ¥ 1,455,494 ¥ 5,014,606 ¥ 13,513,611 ¥ 633,131 ¥ 295,113 ¥ 295,113 Non-consolidated VIEs On-balance sheet assets On-balance sheet liabilities At September 30, 2023: Total assets Maximum exposure Total Trading account assets Investment securities Loans All other Total All other liabilities (in millions) Asset-backed conduits ¥ 47,471,678 ¥ 9,089,567 ¥ 7,124,602 ¥ 12,163 ¥ 2,157,156 ¥ 4,942,714 ¥ 12,569 ¥ 18,936 ¥ 18,936 Investment funds 96,500,851 6,697,234 4,355,603 452,953 168,683 3,310,669 423,298 42,092 42,092 Special purpose entities created for structured financing 66,635,155 7,309,836 4,838,196 66,104 43,255 4,685,051 43,786 382,651 382,651 Repackaged instruments 9,710,418 5,016,578 4,846,411 1,436,901 2,805,459 427,025 177,026 1,342 1,342 Other 89,295,182 4,721,771 3,139,977 221,414 3,716 2,858,393 56,454 31,282 31,282 Total ¥ 309,613,284 ¥ 32,834,986 ¥ 24,304,789 ¥ 2,189,535 ¥ 5,178,269 ¥ 16,223,852 ¥ 713,133 ¥ 476,303 ¥ 476,303

Fees and Commissions Income (Ta

Fees and Commissions Income (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2022 and 2023 are as follows: 2022 2023 (in millions) Fees and commissions on deposits ¥ 27,784 ¥ 18,310 Fees and commissions on remittances and transfers 73,627 73,427 Fees and commissions on foreign trading business 35,165 36,901 Fees and commissions on credit card business 111,697 120,071 Fees and commissions on security-related services 107,541 132,829 Fees and commissions on administration and management services for investment funds 133,070 150,525 Trust fees 66,832 62,724 Guarantee fees (1) 23,481 25,237 Insurance commissions 22,259 26,482 Fees and commissions on real estate business 21,984 22,347 Other fees and commissions (2) 164,202 212,405 Total ¥ 787,642 ¥ 881,258 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, 2023
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, 2022: Net revenue: ¥ 371.7 ¥ 283.8 ¥ 345.3 ¥ 447.4 ¥ 177.2 ¥ 345.5 ¥ 1,970.9 ¥ 360.6 ¥ 13.4 ¥ 2,344.9 BK and TB (1) : 127.2 194.6 277.5 27.3 53.0 247.4 927.0 225.6 23.5 1,176.1 Net interest income 106.7 90.8 153.0 27.3 5.3 114.5 497.6 604.6 57.8 1,160.0 Net fees 19.2 87.2 91.9 — 47.8 114.1 360.2 (8.6) (30.7) 320.9 Other 1.3 16.6 32.6 — (0.1) 18.8 69.2 (370.4) (3.6) (304.8) Other than BK and TB 244.5 89.2 67.8 420.1 124.2 98.1 1,043.9 135.0 (10.1) 1,168.8 Operating expenses 259.0 227.6 165.8 305.0 123.4 168.4 1,249.2 136.3 69.8 1,455.3 Operating profit (loss) ¥ 112.7 ¥ 56.2 ¥ 179.5 ¥ 142.4 ¥ 53.8 ¥ 177.1 ¥ 721.7 ¥ 224.3 ¥ (56.4) ¥ 889.6 Fixed assets (2) ¥ 147.5 ¥ 199.1 ¥ 157.1 ¥ 1.2 ¥ 13.7 ¥ 134.5 ¥ 653.1 ¥ 108.7 ¥ 541.5 ¥ 1,303.3 Increase in fixed assets (3) ¥ 15.2 ¥ 21.0 ¥ 17.7 ¥ 0.4 ¥ 3.2 ¥ 9.7 ¥ 67.2 ¥ 10.4 ¥ 9.6 ¥ 87.2 Depreciation (3) ¥ 5.1 ¥ 11.0 ¥ 18.0 ¥ 0.1 ¥ 2.8 ¥ 15.5 ¥ 52.5 ¥ 13.3 ¥ 8.8 ¥ 74.6 Six months ended September 30, 2023: Net revenue: ¥ 380.2 ¥ 318.8 ¥ 463.8 ¥ 310.9 ¥ 205.7 ¥ 418.4 ¥ 2,097.8 ¥ 381.7 ¥ 25.0 ¥ 2,504.5 BK and TB (1) : 124.3 220.0 376.8 19.6 56.8 376.6 1,174.1 229.4 106.3 1,509.8 Net interest income 106.9 115.1 237.4 19.1 6.5 195.6 680.6 119.3 86.6 886.5 Net fees 16.6 91.1 104.9 — 50.3 162.4 425.3 (9.3) (7.2) 408.8 Other 0.8 13.8 34.5 0.5 — 18.6 68.2 119.4 26.9 214.5 Other than BK and TB 255.9 98.8 87.0 291.3 148.9 41.8 923.7 152.3 (81.3) 994.7 Operating expenses 264.2 230.8 169.4 174.9 145.7 174.1 1,159.1 149.9 117.6 1,426.6 Operating profit (loss) ¥ 116.0 ¥ 88.0 ¥ 294.4 ¥ 136.0 ¥ 60.0 ¥ 244.3 ¥ 938.7 ¥ 231.8 ¥ (92.6) ¥ 1,077.9 Fixed assets (2) ¥ 172.8 ¥ 211.0 ¥ 161.0 ¥ 1.3 ¥ 22.1 ¥ 168.4 ¥ 736.6 ¥ 108.4 ¥ 531.9 ¥ 1,376.9 Increase in fixed assets (3) ¥ 19.1 ¥ 20.8 ¥ 22.3 ¥ 0.2 ¥ 7.3 ¥ 15.9 ¥ 85.6 ¥ 13.1 ¥ 15.3 ¥ 114.0 Depreciation (3) ¥ 7.0 ¥ 12.0 ¥ 21.2 ¥ 0.1 ¥ 4.0 ¥ 21.8 ¥ 66.1 ¥ 15.5 ¥ 8.6 ¥ 90.2 Notes: (1) “BK and TB” is a sum of MUFG Bank on a stand-alone basis (BK) and Mitsubishi UFJ Trust and Banking on a stand-alone basis (TB). (2) Fixed assets in the above table are based on the financial information prepared in accordance with Japanese GAAP as adjusted in accordance with internal management accounting rules and practices, and the amounts correspond to premises and equipment-net, intangible assets-net and goodwill of BK and TB. Fixed assets of MUFG and other consolidated subsidiaries and Japanese GAAP consolidation adjustments amounting to ¥1,422.4 billion as of September 30, 2022 and ¥1,344.5 billion as of September 30, 2023, respectively, are not allocated to each business segment when determining the allocation of management resources and assessing performance and, therefore, such amounts are not included in the table above. (3) These amounts are related to the fixed assets of BK and TB included in the table above.
Reconciliation of Operating Profit (Loss) from Segments to Condensed Consolidated Statements of Income	A reconciliation of operating profit and fixed assets under the internal management reporting system for the six months ended September 30, 2022 and 2023 above to income before income tax expense shown in the accompanying condensed consolidated statements of operations and the total amount of premises and equipment-net, intangible assets-net and goodwill are as follows: Six months ended 2022 2023 (in billions) Operating profit: ¥ 890 ¥ 1,078 Reversal of (provision for) credit losses 98 (62) Foreign exchange losses—net (165) (385) Trading account losses—net (1,670) (1,133) Equity investment securities gains (losses)—net (433) 624 Debt investment securities gains—net 199 102 Equity in earnings of equity method investees—net 187 215 Reversal of off-balance sheet credit instruments 12 4 Reversal of impairment of assets held for sale 134 — Loss on valuation adjustment for loans held for sale held by MUFG Union Bank (209) — Other—net (335) (159) Income (loss) before income tax expense (benefit) ¥ (1,292) ¥ 284 Fixed assets: ¥ 1,303 ¥ 1,377 U.S. GAAP adjustments and other 1,088 1,100 Premises and equipment-net, Intangible assets-net and Goodwill ¥ 2,391 ¥ 2,477

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2023 and September 30, 2023: At March 31, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 19,098,208 ¥ 12,746,415 ¥ 1,182,319 ¥ 33,026,942 Debt securities Japanese national government and Japanese government agency bonds 6,092,523 329,502 — 6,422,025 Japanese prefectural and municipal bonds — 279,168 — 279,168 Foreign government and official institution bonds 11,760,274 493,691 1,168 12,255,133 Corporate bonds 3,965 2,252,424 — 2,256,389 Residential mortgage-backed securities — 4,978,709 — 4,978,709 Commercial mortgage-backed securities — 4,627 — 4,627 Asset-backed securities — 1,210,381 668,911 1,879,292 Other debt securities — — 334,124 334,124 Commercial paper — 1,931,569 — 1,931,569 Equity securities (2) 1,241,446 1,266,344 178,116 2,685,906 Trading derivative assets 84,406 12,674,978 142,343 12,901,727 Interest rate contracts 40,013 7,311,689 93,833 7,445,535 Foreign exchange contracts 3,909 5,258,511 13,714 5,276,134 Equity contracts 40,484 28,617 20,659 89,760 Commodity contracts — 17 9,908 9,925 Credit derivatives — 76,144 3,801 79,945 Other (8) — — 428 428 Trading loans (3) — 13,820 — 13,820 Investment securities: Available-for-sale debt securities 25,236,359 10,250,511 253,932 35,740,802 Japanese national government and Japanese government agency bonds 23,292,055 2,754,548 — 26,046,603 Japanese prefectural and municipal bonds — 2,759,941 — 2,759,941 Foreign government and official institution bonds 1,944,304 978,438 — 2,922,742 Corporate bonds — 1,056,191 1,970 1,058,161 Residential mortgage-backed securities — 1,110,239 15 1,110,254 Asset-backed securities — 1,247,377 182,938 1,430,315 Other debt securities — 343,777 69,009 412,786 Equity securities 4,362,017 101,576 74,761 4,538,354 Marketable equity securities 4,362,017 101,576 — 4,463,593 Nonmarketable equity securities (4) — — 74,761 74,761 Other (5) 1,535,446 848,596 92,251 2,476,293 Total ¥ 50,316,436 ¥ 36,635,896 ¥ 1,745,606 ¥ 88,697,938 At March 31, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 232,287 ¥ 2,620 ¥ — ¥ 234,907 Trading derivative liabilities 163,129 13,718,992 61,247 13,943,368 Interest rate contracts 85,641 8,566,043 45,204 8,696,888 Foreign exchange contracts 1,679 5,013,909 2,369 5,017,957 Equity contracts 75,809 48,953 3,731 128,493 Commodity contracts — — 9,817 9,817 Credit derivatives — 90,087 62 90,149 Other (8) — — 64 64 Obligation to return securities received as collateral (6) 6,664,578 158,763 68,204 6,891,545 Other (7) — 313,482 73,663 387,145 Total ¥ 7,059,994 ¥ 14,193,857 ¥ 203,114 ¥ 21,456,965 At September 30, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 15,816,502 ¥ 14,709,285 ¥ 1,816,498 ¥ 32,342,285 Debt securities Japanese national government and Japanese government agency bonds 6,491,075 497,522 — 6,988,597 Japanese prefectural and municipal bonds — 211,107 — 211,107 Foreign government and official institution bonds 7,754,392 792,052 150 8,546,594 Corporate bonds — 2,660,321 — 2,660,321 Residential mortgage-backed securities — 5,585,266 — 5,585,266 Asset-backed securities — 1,246,481 1,118,759 2,365,240 Other debt securities — 2,135 517,349 519,484 Commercial paper — 2,428,377 — 2,428,377 Equity securities (2) 1,571,035 1,286,024 180,240 3,037,299 Trading derivative assets 143,551 18,330,520 71,219 18,545,290 Interest rate contracts 55,656 11,071,557 23,369 11,150,582 Foreign exchange contracts 4,661 7,159,046 11,989 7,175,696 Equity contracts 83,234 50,814 15,589 149,637 Commodity contracts — 476 18,548 19,024 Credit derivatives — 48,610 1,449 50,059 Other (8) — 17 275 292 Trading loans (3) — 22,996 — 22,996 Investment securities: Available-for-sale debt securities 23,749,188 8,281,883 341,708 32,372,779 Japanese national government and Japanese government agency bonds 21,647,505 2,158,975 — 23,806,480 Japanese prefectural and municipal bonds — 1,435,996 — 1,435,996 Foreign government and official institution bonds 2,101,683 1,045,758 — 3,147,441 Corporate bonds — 994,968 2,193 997,161 Residential mortgage-backed securities — 1,190,307 15 1,190,322 Asset-backed securities — 1,060,851 272,720 1,333,571 Other debt securities — 395,028 66,780 461,808 Equity securities 4,934,283 81,667 82,488 5,098,438 Marketable equity securities 4,934,283 81,568 — 5,015,851 Nonmarketable equity securities (4) — 99 82,488 82,587 Other (5) 854,305 962,406 120,275 1,936,986 Total ¥ 45,497,829 ¥ 42,388,757 ¥ 2,432,188 ¥ 90,318,774 At September 30, 2023 Level 1 Level 2 Level 3 Fair Value (in millions) Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 81,006 ¥ 6,877 ¥ — ¥ 87,883 Trading derivative liabilities 106,471 20,064,626 56,184 20,227,281 Interest rate contracts 28,508 12,746,145 34,249 12,808,902 Foreign exchange contracts 4,886 7,195,310 2,290 7,202,486 Equity contracts 73,077 51,854 530 125,461 Commodity contracts — — 18,592 18,592 Credit derivatives — 71,307 252 71,559 Other (8) — 10 271 281 Obligation to return securities received as collateral (6) 6,602,613 219,257 73,257 6,895,127 Other (7) — 268,535 28,932 297,467 Total ¥ 6,790,090 ¥ 20,559,295 ¥ 158,373 ¥ 27,507,758 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, 2023 were ¥225,972 million and those at September 30, 2023 were ¥267,084 million, respectively. The amounts of unfunded commitments related to these private equity funds at March 31, 2023 were ¥172,562 million, and those at September 30, 2023 were ¥230,396 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, 2023. (3) Includes loans measured under the fair value option. (4) Excludes certain investments valued at net asset value of real estate funds and private equity and other funds whose fair values at March 31, 2023 were ¥29,308 million and ¥51,458 million, respectively, and those at September 30, 2023 were ¥32,322 million and ¥57,383 million, respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2023 were ¥1,305 million and nil, respectively, and those at September 30, 2023 were ¥1,018 million and ¥250 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, 2023. (5) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions. (6) Included in Other liabilities. (7) Mainly includes other short-term borrowings, long-term debt and bifurcated embedded derivatives carried at fair value. (8) Includes certain derivatives such as earthquake derivatives.
Reconciliation of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 Inputs	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, 2022 March 31, 2022 Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2022 (in millions) Assets Trading account assets: Trading securities (1) ¥ 797,997 ¥ 125,172 (2) ¥ — ¥ 333,302 ¥ — ¥ (21,408) ¥ (9,255) ¥ — ¥ (877) ¥ 1,224,931 ¥ 121,950 (2) Debt securities Foreign government and official institution bonds 1,711 57 — 5,712 — (5,765) (250) — (194) 1,271 5 Corporate bonds 683 — — — — — — — (683) — — Asset-backed securities 315,231 72,667 — 324,375 — (15,636) (259) — — 696,378 71,580 Other debt securities 313,166 44,986 — — — — — — — 358,152 44,986 Equity securities 167,206 7,462 — 3,215 — (7) (8,746) — — 169,130 5,379 Trading derivatives—net 71,089 (24,159) (2) 1,775 612 (334) — (19,889) 20,791 (25,003) 24,882 (21,160) (2) Interest rate contracts—net 37,493 (39,744) 30 — — — (1,901) 20,612 (5) (25,017) (5) (8,527) (33,999) Foreign exchange contracts—net 7,463 3,509 392 — — — (4,200) 179 56 7,399 1,705 Equity contracts—net 23,420 10,723 1,355 19 — — (13,639) — (42) 21,836 9,785 Commodity contracts—net (45) 26 (2) — — — (5) — — (26) 27 Credit derivatives—net 2,729 1,236 — — — — (144) — — 3,821 1,232 Other—net (8) 29 91 — 593 (334) — — — — 379 90 Investment securities: Available-for-sale debt securities 212,936 (1,096) (3) 30,227 170,610 — — (141,788) 1,405 — 272,294 23,794 (3) Foreign government and official institution bonds 11,890 — (925) 128 — — (11,093) — — — — Corporate bonds 3,089 (42) 210 1,824 — — (57) 1,255 — 6,279 165 Residential mortgage-backed securities 15 — — — — — — — — 15 — Asset-backed securities 124,379 (1,125) 21,490 168,312 — — (130,638) — — 182,418 14,106 Other debt securities 73,563 71 9,452 346 — — — 150 — 83,582 9,523 Equity securities 55,883 1,881 (3) 495 9,884 — (1,336) (806) 2,855 (236) 68,620 1,737 (3) Nonmarketable equity securities 55,883 1,881 495 9,884 — (1,336) (806) 2,855 (236) 68,620 1,737 Other 4,912 357 (7) (3) 89,081 — — (111) 1,925 — 96,161 357 (7) Assets held for sale 76,918 3,928 (9) 13,071 1,120 — (1,158) (9,254) — — 84,625 15,113 (9) Investment securities 65,262 (1,261) 10,114 93 — (1,158) (9,254) — — 63,796 7,456 Other 11,656 5,189 2,957 1,027 — — — — — 20,829 7,657 Total ¥ 1,219,735 ¥ 106,083 ¥ 45,565 ¥ 604,609 ¥ (334) ¥ (23,902) ¥ (181,103) ¥ 26,976 ¥ (26,116) ¥ 1,771,513 ¥ 141,791 Liabilities Obligation to return securities received as collateral ¥ — ¥ — ¥ — ¥ — ¥ 73,595 ¥ — ¥ — ¥ — ¥ — ¥ 73,595 ¥ — Other 16,463 54,070 (4) (10,269) — 54,527 — (19,043) 116,892 (6) (3,554) (6) 121,484 58,483 (4) Total ¥ 16,463 ¥ 54,070 ¥ (10,269) ¥ — ¥ 128,122 ¥ — ¥ (19,043) ¥ 116,892 ¥ (3,554) ¥ 195,079 ¥ 58,483 Total gains (losses) Change in unrealized gains (losses) for assets and liabilities still held at September 30, 2023 March 31, Included Included Purchases Issues Sales Settlements Transfers Transfers September 30, 2023 (in millions) Assets Trading account assets: Trading securities (1) ¥ 1,182,319 ¥ 149,674 (2) ¥ — ¥ 494,881 ¥ — ¥ (626) ¥ (9,895) ¥ 145 ¥ — ¥ 1,816,498 ¥ 148,307 (2) Debt securities Foreign government and official institution bonds 1,168 122 — 7 — (7) (1,140) — — 150 (1) Asset-backed securities 668,911 108,122 — 345,917 — — (4,191) — — 1,118,759 107,898 Other debt securities 334,124 42,225 — 141,000 — — — — — 517,349 42,225 Equity securities 178,116 (795) — 7,957 — (619) (4,564) 145 — 180,240 (1,815) Trading derivatives—net 81,096 (12,416) (2) 1,836 4 (355) — (10,117) 10,271 (55,284) 15,035 (14,426) (2) Interest rate contracts—net 48,629 (16,890) (1,036) — — — 1,267 10,595 (5) (53,445) (5) (10,880) (18,757) Foreign exchange contracts—net 11,345 (2,797) 999 — — — 417 (324) 59 9,699 (2,220) Equity contracts—net 16,928 8,065 1,874 4 — — (11,696) — (116) 15,059 7,327 Commodity contracts—net 91 (128) (1) — — — (6) — — (44) (128) Credit derivatives—net 3,739 (661) — — — — (99) — (1,782) 1,197 (648) Other—net (8) 364 (5) — — (355) — — — — 4 — Investment securities: Available-for-sale debt securities 253,932 1,677 (3) 20,568 205,826 — — (140,321) 26 — 341,708 18,299 (3) Corporate bonds 1,970 (2) 203 — — — (4) 26 — 2,193 201 Residential mortgage-backed securities 15 — — — — — — — — 15 — Asset-backed securities 182,938 1,597 15,841 205,611 — — (133,267) — — 272,720 13,492 Other debt securities 69,009 82 4,524 215 — — (7,050) — — 66,780 4,606 Equity securities 74,761 3,385 (3) 408 5,870 — (1,474) — — (462) 82,488 2,503 (3) Nonmarketable equity securities 74,761 3,385 408 5,870 — (1,474) — — (462) 82,488 2,503 Other 92,251 (37) (7) 154 27,955 — — (48) — — 120,275 (37) (7) Total ¥ 1,684,359 ¥ 142,283 ¥ 22,966 ¥ 734,536 ¥ (355) ¥ (2,100) ¥ (160,381) ¥ 10,442 ¥ (55,746) ¥ 2,376,004 ¥ 154,646 Liabilities Obligation to return securities received as collateral ¥ 68,204 ¥ — ¥ — ¥ — ¥ 5,053 ¥ — ¥ — ¥ — ¥ — ¥ 73,257 ¥ — Other 73,663 (24,475) (4) (5,791) — 23,080 — (54,619) 5,147 (6) (48,605) (6) 28,932 (6,980) (4) Total ¥ 141,867 ¥ (24,475) ¥ (5,791) ¥ — ¥ 28,133 ¥ — ¥ (54,619) ¥ 5,147 ¥ (48,605) ¥ 102,189 ¥ (6,980) Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account losses—net and Foreign exchange losses—net. (3) Included in Investment securities gains (losses)—net and Other comprehensive income (loss), net of tax. (4) Included in Trading account losses—net and Other comprehensive income (loss), net of tax. (5) For the six months ended September 30, 2022 and 2023, transfers into Level 3 for Interest rate contracts—net were mainly caused by changes in the impact of unobservable input to the entire fair value measurement. Unobservable inputs include loss given default. Transfers out of Level 3 for Interest rate contracts—net were mainly caused by changes in the impact of unobservable inputs to the fair value measurement of the multi-callable swaps. (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) Includes certain derivatives such as earthquake derivatives. (9) Included in Investment securities gains (losses)—net, Trading account losses—net, Fees and commissions income and Other comprehensive income (loss), net of tax.
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, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Residential mortgage-backed securities and Asset-backed securities ¥ 101,014 Discounted cash flow Recovery rate 100.0% 100.0 % 591,515 Internal model (4) Asset correlations 3.0% 3.0 % Discount factor 2.0 % ~ 2.3 % 2.0 % Prepayment rate 13.1% 13.1 % Probability of default 0.0 % ~ 99.0 % — (3) Recovery rate 72.2% 72.2 % Other debt securities 385,046 Discounted cash flow Liquidity premium 0.9 % ~ 3.2 % 2.8 % At March 31, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net 48,209 Option model Correlation between interest rates 30.0 % ~ 60.6 % 44.4 % Correlation between interest rate and foreign exchange rate 2.0 % ~ 60.0 % 36.6 % Volatility 70.3 % ~ 106.7 % 80.1 % Foreign exchange contracts—net 11,345 Option model Correlation between interest rates 30.0 % ~ 70.0 % 50.6 % Correlation between interest rate and foreign exchange rate 14.3 % ~ 60.0 % 36.8 % Correlation between foreign exchange rates 50.0 % ~ 70.6 % 66.4 % Volatility 10.6 % ~ 23.0 % 15.6 % Equity contracts—net 3,316 Option model Correlation between foreign exchange rate and equity (58.4) % ~ 55.0 % 15.0 % Correlation between equities 5.6 % ~ 95.0 % 54.1 % Volatility 28.0 % ~ 37.0 % 32.2 % 13,612 Discounted cash flow Term of litigation 0.1 years ~ 1.0 year 0.5 years At September 30, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted average (2) (in millions) Assets Trading securities and Investment securities: Residential mortgage-backed securities and Asset-backed securities ¥ 111,944 Discounted cash flow Recovery rate 100.0% 100.0 % 1,031,791 Internal model (4) Asset correlations 3.0% 3.0 % Discount factor 1.8 % ~ 2.0 % 1.8 % Prepayment rate 13.9% 13.9 % Probability of default 0.0 % ~ 99.0 % — (3) Recovery rate 57.7% 57.7 % Other debt securities 565,788 Discounted cash flow Liquidity premium 0.9 % ~ 3.2 % 2.8 % At September 30, 2023 Fair value (1) Valuation technique Significant unobservable inputs Range Median (2) (in millions) Trading derivatives—net: Interest rate contracts—net (10,880) Option model Correlation between interest rates 30.0 % ~ 60.3 % 43.6 % Correlation between interest rate and foreign exchange rate 1.3 % ~ 60.0 % 36.2 % Volatility 49.9 % ~ 72.2 % 69.2 % Foreign exchange contracts—net 9,699 Option model Correlation between interest rates 30.0 % ~ 70.0 % 51.0 % Correlation between interest rate and foreign exchange rate 20.0 % ~ 60.0 % 37.0 % Correlation between foreign exchange rates 50.0 % 70.6 % 66.4 % Volatility 10.6 % ~ 21.9 % 14.5 % Equity contracts—net 7,589 Option model Correlation between foreign exchange rate and equity (58.4) % ~ 30.0 % 10.0 % Correlation between equities 5.8 % ~ 95.0 % 53.1 % Volatility 28.5 % ~ 37.0 % 33.6 % 7,470 Discounted cash flow Term of litigation 0.3 years ~ 0.8 years 0.5 years Notes: (1) The fair value as of March 31, 2023 and September 30, 2023 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, 2023. (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, 2023.
Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level	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, 2023 and September 30, 2023: March 31, 2023 September 30, 2023 Level 1 Level 2 Level 3 Total carrying value Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ 13,366 ¥ 13,271 ¥ 26,637 ¥ — ¥ 9,560 ¥ 44,882 ¥ 54,442 Loans 1,917 3,388 611,055 616,360 2,389 4,222 745,699 752,310 Loans held for sale — — 439,361 439,361 — — 584,558 584,558 Collateral dependent loans 1,917 3,388 171,694 176,999 2,389 4,222 161,141 167,752 Premises and equipment — — 11,835 11,835 — — 3,866 3,866 Intangible assets — — 309 309 — — 5,063 5,063 Goodwill — — 184,364 184,364 — — — — Other assets 178,592 — 29,003 207,595 — 38,152 24,622 62,774 Investments in equity method investees (1) 178,592 — 12,472 191,064 — 33,222 1,740 34,962 Other — — 16,531 16,531 — 4,930 22,882 27,812 Total ¥ 180,509 ¥ 16,754 ¥ 849,837 ¥ 1,047,100 ¥ 2,389 ¥ 51,934 ¥ 824,132 ¥ 878,455 Notes: (1) Excludes certain investments valued at net asset value of ¥33,595 million and ¥11,184 million at March 31, 2023 and September 30, 2023, respectively. The unfunded commitments related to these investments are ¥23,029 million and ¥18,170 million at March 31, 2023 and September 30, 2023, 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, 2023. (2) Includes certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including impairment and observable price change for nonmarketable equity securities measured under the measurement alternative.
Losses (Gains) Recorded as a Result of Changes in Fair Value Measured on a Nonrecurring Basis	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, 2022 and 2023: Losses (gains) for the six months ended September 30, 2022 2023 (in millions) Investment securities ¥ 505 ¥ 8,971 Loans (66) 44,746 Loans held for sale 451 11,096 Collateral dependent loans (517) 33,650 Premises and equipment 2,579 1,142 Intangible assets 849 11,433 Other assets 50,761 22,809 Investments in equity method investees 46,928 12,687 Other 3,833 10,122 Assets held for sale 209,107 — Loans held for sale 209,107 — Total (1) ¥ 263,735 ¥ 89,101 Note: (1) In addition to the above table, the assets and liabilities of MUFG Union Bank, which were transferred to U.S. Bancorp, were reclassified as held for sale. As a result, the disposal group was measured at the lower of carrying value or fair value less costs to sell. The impairment of assets held for sale of ¥134,141 million was recognized during the second half of the fiscal year ended March 31, 2022. However, the fair value less cost to sell exceeded the carrying value as of September 30, 2022, and the reversal of ¥134,141 million, which is included in Reversal of impairment of assets held for sale in the consolidated statements of operations through the six months ended September 30, 2022, was recognized.
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, 2022 and 2023 related to the eligible instruments for which the MUFG Group elected the fair value option: Six months ended September 30, 2022 2023 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 ¥ (1,434,189) ¥ 2,339,864 ¥ 905,675 ¥ (596,477) ¥ 1,762,384 ¥ 1,165,907 Total ¥ (1,434,189) ¥ 2,339,864 ¥ 905,675 ¥ (596,477) ¥ 1,762,384 ¥ 1,165,907 Financial liabilities: Other short-term borrowings (1) ¥ (3,295) ¥ — ¥ (3,295) ¥ 2,592 ¥ — ¥ 2,592 Long-term debt (1) 57,444 — 57,444 (5,617) — (5,617) Total ¥ 54,149 ¥ — ¥ 54,149 ¥ (3,025) ¥ — ¥ (3,025) Note: (1) Change in value attributable to the instrument-specific credit risk related to those financial liabilities are not material.
Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding	The following table presents the differences between the aggregate fair value and the aggregate remaining contractual principal balance outstanding as of March 31, 2023 and September 30, 2023 for long-term debt instruments for which the fair value option has been elected: March 31, 2023 September 30, 2023 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 ¥ 501,982 ¥ 431,338 ¥ (70,644) ¥ 363,840 ¥ 339,840 ¥ (24,000) Total ¥ 501,982 ¥ 431,338 ¥ (70,644) ¥ 363,840 ¥ 339,840 ¥ (24,000)
Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Not Carried at Fair Value on a Recurring Basis on Consolidated Balance Sheets 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, 2023 and September 30, 2023: At March 31, 2023 Carrying amount Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 60,051 ¥ 60,051 ¥ 60,051 ¥ — ¥ — Interest-earning deposits in other banks 53,990 53,990 — 53,990 — Call loans and funds sold 1,802 1,802 — 1,802 — Receivables under resale agreements 14,059 14,059 — 14,059 — Receivables under securities borrowing transactions 4,556 4,556 — 4,556 — Investment securities 21,520 21,386 13,527 5,354 2,505 Loans, net of allowance for credit losses (1) 118,679 118,933 2 263 118,668 Other financial assets (2) 10,108 10,108 — 10,108 — Financial liabilities: Deposits Non-interest-bearing ¥ 37,804 ¥ 37,804 ¥ — ¥ 37,804 ¥ — Interest-bearing 197,500 197,573 — 197,573 — Total deposits 235,304 235,377 — 235,377 — Call money and funds purchased 3,438 3,438 — 3,438 — Payables under repurchase agreements 40,132 40,132 — 40,132 — Payables under securities lending transactions 1,138 1,138 — 1,138 — Due to trust account and other short-term borrowings 14,260 14,260 — 14,260 — Long-term debt 38,704 37,928 — 37,928 — Other financial liabilities 9,595 9,595 — 9,595 — At September 30, 2023 Carrying Estimated fair value Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 59,954 ¥ 59,954 ¥ 59,954 ¥ — ¥ — Interest-earning deposits in other banks 48,957 48,957 — 48,957 — Call loans and funds sold 2,970 2,970 — 2,970 — Receivables under resale agreements 16,370 16,370 — 16,370 — Receivables under securities borrowing transactions 5,085 5,085 — 5,085 — Investment securities 24,657 24,158 14,654 6,761 2,743 Loans, net of allowance for credit losses (1) 123,110 123,162 2 288 122,872 Other financial assets (2) 11,564 11,564 — 11,564 — Financial liabilities: Deposits Non-interest-bearing ¥ 38,084 ¥ 38,084 ¥ — ¥ 38,084 ¥ — Interest-bearing 205,757 205,841 — 205,841 — Total deposits 243,841 243,925 — 243,925 — Call money and funds purchased 3,854 3,854 — 3,854 — Payables under repurchase agreements 32,960 32,960 — 32,960 — Payables under securities lending transactions 1,017 1,017 — 1,017 — Due to trust account and other short-term borrowings 14,412 14,412 — 14,412 — Long-term debt 40,186 39,045 — 39,045 — Other financial liabilities 9,875 9,875 — 9,875 — 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 ¥3,482 billion and ¥3,950 billion at March 31, 2023 and September 30, 2023, respectively.

Investments in Equity Method _2

Investments in Equity Method Investees (Tables)	6 Months Ended
	Sep. 30, 2023
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, 2022 and 2023 are as follows: 2022 2023 (in billions) Net revenues ¥ 3,499 ¥ 3,769 Total non-interest expenses 2,582 2,887 Income from continuing operations before income taxes 899 840 Net income applicable to Morgan Stanley 687 647

Business Developments - Narrati

Business Developments - Narrative (Details) - JPY (¥) ¥ in Millions			1 Months Ended	6 Months Ended			12 Months Ended
	Jun. 01, 2023	Dec. 01, 2022	Aug. 31, 2023	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2022	Mar. 31, 2023	Aug. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on valuation adjustment for loans held for sale held by MUFG Union Bank				¥ 0	¥ 209,107
Assets reclassified, excluding cash and cash equivalents				0	1,794,976
Liabilities reclassified				0	2,592,893
Goodwill				378,323	¥ 341,022	¥ 303,611	¥ 296,772
HC Consumer Finance Philippines
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of voting interests acquired	100%
Payment in cash	¥ 61,605
Assets acquired	130,640
Liabilities acquired	95,448
Goodwill	¥ 26,328
MUFG Union Bank | HC Consumer Finance Philippines
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of voting interests acquired	25%
Krungsri | HC Consumer Finance Philippines
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of voting interests acquired	75%
MUAH | MUFG Union Bank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contingent consideration period								5 years
Payments of dividends		¥ 636,800
Shares of U.S. Bancorp common stock received
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncash divestiture, consideration received		¥ 276,100
U.S. Bancorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
NCI ownership percentage		3%	4.39%
U.S. Bancorp | MUFG Union Bank
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of shares acquired (in shares)			24,000,000
Consideration transferred			¥ 136,800
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]
Loss on valuation adjustment for loans held for sale held by MUFG Union Bank						¥ 134,141	¥ 134,141
Income (loss) from discontinued operation before income tax				346,781
Cash proceeds from divestiture of businesses		¥ 754,000
Contingent consideration				¥ 464,500
Contingent consideration period				5 years
Contingent consideration, discounted present value				¥ 396,600
Pretax gain on sale		557,954
Disposal Group, Including Discontinued Operation, Interest deposits in other banks		2,251,300
Assets reclassified, excluding cash and cash equivalents		13,935,600
Disposal Group, Including Discontinued Operation, Investment Securities		3,123,300
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		7,567,700
Liabilities reclassified		13,128,000
Disposal Group, Including Discontinued Operation, Deposits Payable		¥ 11,789,900
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank | U.S. Bancorp
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncash proceeds from diversiture of business, shares (in shares)		44,374,155

Investment Securities (Amortize

Investment Securities (Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	¥ 32,755,032	¥ 35,954,445
Available-for-sale debt securities, Gross unrealized gains	30,618	48,994
Available-for-sale debt securities, Gross unrealized losses	412,871	262,637
Available-for-sale debt securities	32,372,779	35,740,802
Total	24,657,026	21,520,081
Held-to-maturity debt securities, Gross unrealized gains	10,214	49,238
Held-to-maturity debt securities, Gross unrealized losses	509,153	183,163
Held-to-maturity debt securities, fair value	24,158,087	21,386,156
Japanese national government and Japanese government agency bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	24,004,739	26,153,862
Available-for-sale debt securities, Gross unrealized gains	6,628	16,510
Available-for-sale debt securities, Gross unrealized losses	204,887	123,769
Available-for-sale debt securities	23,806,480	26,046,603
Total	15,278,373	13,860,457
Held-to-maturity debt securities, Gross unrealized gains	9,192	32,927
Held-to-maturity debt securities, Gross unrealized losses	125,726	19,789
Held-to-maturity debt securities, fair value	15,161,839	13,873,595
Japanese prefectural and municipal bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,448,520	2,773,750
Available-for-sale debt securities, Gross unrealized gains	529	2,063
Available-for-sale debt securities, Gross unrealized losses	13,053	15,872
Available-for-sale debt securities	1,435,996	2,759,941
Total	1,742,822	1,144,825
Held-to-maturity debt securities, Gross unrealized gains	69	2,473
Held-to-maturity debt securities, Gross unrealized losses	25,501	7,808
Held-to-maturity debt securities, fair value	1,717,390	1,139,490
Foreign government and official institution bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	3,321,914	3,029,042
Available-for-sale debt securities, Gross unrealized gains	1,887	2,072
Available-for-sale debt securities, Gross unrealized losses	176,360	108,372
Available-for-sale debt securities	3,147,441	2,922,742
Corporate bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	993,368	1,051,347
Available-for-sale debt securities, Gross unrealized gains	8,886	9,791
Available-for-sale debt securities, Gross unrealized losses	5,093	2,977
Available-for-sale debt securities	997,161	1,058,161
Total	83,270	46,730
Held-to-maturity debt securities, Gross unrealized gains	70	213
Held-to-maturity debt securities, Gross unrealized losses	216	3
Held-to-maturity debt securities, fair value	83,124	46,940
Residential mortgage-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,190,027	1,110,126
Available-for-sale debt securities, Gross unrealized gains	630	569
Available-for-sale debt securities, Gross unrealized losses	335	441
Available-for-sale debt securities	1,190,322	1,110,254
Total	4,785,680	3,913,346
Held-to-maturity debt securities, Gross unrealized gains	0	13,606
Held-to-maturity debt securities, Gross unrealized losses	333,444	105,754
Held-to-maturity debt securities, fair value	4,452,236	3,821,198
Asset-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,327,319	1,418,563
Available-for-sale debt securities, Gross unrealized gains	10,448	16,116
Available-for-sale debt securities, Gross unrealized losses	4,196	4,364
Available-for-sale debt securities	1,333,571	1,430,315
Total	2,766,881	2,554,723
Held-to-maturity debt securities, Gross unrealized gains	883	19
Held-to-maturity debt securities, Gross unrealized losses	24,266	49,809
Held-to-maturity debt securities, fair value	2,743,498	2,504,933
Other debt securities
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	469,145	417,755
Available-for-sale debt securities, Gross unrealized gains	1,610	1,873
Available-for-sale debt securities, Gross unrealized losses	8,947	6,842
Available-for-sale debt securities	¥ 461,808	¥ 412,786

Investment Securities (Amorti_2

Investment Securities (Amortized Cost and Fair Value by Contractual Maturity) (Detail) ¥ in Millions	Sep. 30, 2023 JPY (¥)
Held-to-maturity debt securities, Amortized cost:
Due in one year or less	¥ 2,855,090
Due from one year to five years	9,204,124
Due from five years to ten years	6,823,850
Due after ten years	5,773,962
Total	24,657,026
Held-to-maturity debt securities, Fair value:
Due in one year or less	2,860,151
Due from one year to five years	9,180,648
Due from five years to ten years	6,685,577
Due after ten years	5,431,711
Total	24,158,087
Available-for-sale debt securities, Fair value:
Due in one year or less	21,295,450
Due from one year to five years	6,105,423
Due from five years to ten years	1,700,974
Due after ten years	3,270,932
Total	¥ 32,372,779

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Investment Securities [Line Items]
Gross realized gains on sales of Available-for-sale debt securities	¥ 79,165	¥ 82,340
Gross realized losses on sales of available-for-sale debt securities	26,596	72,520
Investment securities gains (losses) —net	¥ 743,395	(493,309)
Corporate bonds
Investment Securities [Line Items]
Investment securities gains (losses) —net		¥ 299,478

Investment Securities (Investme

Investment Securities (Investments by Length and Category in Continuous Loss Position) (Detail) ¥ in Millions	Sep. 30, 2023 JPY (¥) Security	Mar. 31, 2023 JPY (¥) Security
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 17,430,936	¥ 10,322,922
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	37,747	35,765
Available-for-sale debt securities, Fair value, 12 months or more	5,693,622	5,113,458
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	375,124	226,872
Available-for-sale debt securities, Fair value, Total	23,124,558	15,436,380
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 412,871	¥ 262,637
Available-for-sale debt securities, Number of securities | Security	1,617	1,610
Japanese national government and Japanese government agency bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 15,513,132	¥ 7,644,337
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	11,509	8,066
Available-for-sale debt securities, Fair value, 12 months or more	2,281,507	2,105,210
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	193,378	115,703
Available-for-sale debt securities, Fair value, Total	17,794,639	9,749,547
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 204,887	¥ 123,769
Available-for-sale debt securities, Number of securities | Security	465	438
Japanese prefectural and municipal bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 632,087	¥ 962,234
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	2,471	1,781
Available-for-sale debt securities, Fair value, 12 months or more	547,689	711,896
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	10,582	14,091
Available-for-sale debt securities, Fair value, Total	1,179,776	1,674,130
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 13,053	¥ 15,872
Available-for-sale debt securities, Number of securities | Security	618	723
Foreign government and official institution bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 414,975	¥ 858,970
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	16,286	18,677
Available-for-sale debt securities, Fair value, 12 months or more	2,044,973	1,436,798
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	160,074	89,695
Available-for-sale debt securities, Fair value, Total	2,459,948	2,295,768
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 176,360	¥ 108,372
Available-for-sale debt securities, Number of securities | Security	112	118
Corporate bonds
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 223,396	¥ 331,411
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,646	1,800
Available-for-sale debt securities, Fair value, 12 months or more	379,043	249,088
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	3,447	1,177
Available-for-sale debt securities, Fair value, Total	602,439	580,499
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 5,093	¥ 2,977
Available-for-sale debt securities, Number of securities | Security	298	256
Residential mortgage-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 50,483	¥ 166,778
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	2	5
Available-for-sale debt securities, Fair value, 12 months or more	310,171	522,774
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	333	436
Available-for-sale debt securities, Fair value, Total	360,654	689,552
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 335	¥ 441
Available-for-sale debt securities, Number of securities | Security	10	15
Asset-backed securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 254,849	¥ 310,388
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	3,647	4,170
Available-for-sale debt securities, Fair value, 12 months or more	71,708	39,806
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	549	194
Available-for-sale debt securities, Fair value, Total	326,557	350,194
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 4,196	¥ 4,364
Available-for-sale debt securities, Number of securities | Security	26	32
Other debt securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 342,014	¥ 48,804
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	2,186	1,266
Available-for-sale debt securities, Fair value, 12 months or more	58,531	47,886
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	6,761	5,576
Available-for-sale debt securities, Fair value, Total	400,545	96,690
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 8,947	¥ 6,842
Available-for-sale debt securities, Number of securities | Security	88	28

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, 2023	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized during the period	¥ 687,966	¥ (203,007)
Net gains (losses) recognized during the period on equity securities sold during the period	19,195	(214)
Net unrealized gains (losses) recognized during the reporting period still held at the reporting date	¥ 668,771	¥ (202,793)

Investment Securities (Carrying

Investment Securities (Carrying Value of Nonmarketable Equity Securities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Nonmarketable equity securities | Measurement Alternative
Investment Securities [Line Items]
Measurement alternative balance	¥ 471,832	¥ 381,928

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, 2023	Sep. 30, 2022	Mar. 31, 2023
Investment Securities [Line Items]
Measurement alternative impairment losses	¥ (8,187)	¥ (5,155)
Measurement alternative downward changes for observable prices	(1,567)	(440)
Measurement alternative upward changes for observable prices	783	¥ 5,090
Cumulative impairment losses	27,784		¥ 20,151
Cumulative downward changes for observable prices	2,961		1,393
Cumulative upward changes for observable prices	¥ 59,822		¥ 59,069

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses (Narrative) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	¥ 1,944,234		¥ 1,794,983
Accrued interest receivable	629,985		500,506
Credit to borrowers experiencing financial difficulty
Financing Receivable, Allowance for Credit Losses [Line Items]
Other commitment	19,982
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Significant sales of loans	¥ 1,206,000	¥ 1,295,000
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
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	¥ 3,405		3,173
Card | Greater Than 3 months
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	4,034		3,676
Card | Total Past Due
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable: Other	¥ 7,439		6,849
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]
Assets including loans			¥ 2,614,535
Significant sales of loans		¥ 337,000
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_4

Loans and Allowance for Credit Losses (Total Outstanding Loans and Past Due Analysis) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	¥ 124,839,339	¥ 120,356,472
Loans Held for Sale	1,054,999	967,082
Past Due 90 Days and Accruing	20,089	18,152
Unearned income, unamortized premiums—net and deferred loan fees—net	(436,827)	(401,012)
Total	124,402,512	119,955,460
1-3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	300,174	265,966
Greater Than 3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	287,194	240,633
Total Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	587,368	506,599
Current
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	123,196,972	118,882,791
Residential
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	12,597,905	12,874,855
Loans Held for Sale	0	0
Past Due 90 Days and Accruing	4,396	3,342
Residential | 1-3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	34,298	32,514
Residential | Greater Than 3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	12,879	11,496
Residential | Total Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	47,177	44,010
Residential | Current
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	12,550,728	12,830,845
Card
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	478,382	472,842
Loans Held for Sale	0	0
Past Due 90 Days and Accruing	0	0
Card | 1-3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	15,815	14,992
Card | Greater Than 3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	27,762	26,587
Card | Total Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	43,577	41,579
Card | Current
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	434,805	431,263
Krungsri
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	8,747,708	7,782,635
Loans Held for Sale	0	0
Past Due 90 Days and Accruing	0	0
Krungsri | 1-3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	224,565	188,802
Krungsri | Greater Than 3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	167,420	136,627
Krungsri | Total Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	391,985	325,429
Krungsri | Current
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	8,355,723	7,457,206
Other
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,708,406	1,410,410
Loans Held for Sale	0	0
Past Due 90 Days and Accruing	0	0
Other | 1-3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	18,416	14,241
Other | Greater Than 3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	29,673	20,235
Other | Total Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	48,089	34,476
Other | Current
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,660,317	1,375,934
Domestic | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	55,325,992	55,626,058
Loans Held for Sale	57,876	87,659
Past Due 90 Days and Accruing	2,510	2,652
Domestic | Commercial | 1-3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	5,741	6,599
Domestic | Commercial | Greater Than 3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	11,431	12,485
Domestic | Commercial | Total Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	17,172	19,084
Domestic | Commercial | Current
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	55,250,944	55,519,315
Foreign | Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	45,980,946	42,189,672
Loans Held for Sale	997,123	879,423
Past Due 90 Days and Accruing	13,183	12,158
Foreign | Commercial | 1-3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	1,339	8,818
Foreign | Commercial | Greater Than 3 months
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	38,029	33,203
Foreign | Commercial | Total Past Due
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	39,368	42,021
Foreign | Commercial | Current
Loans and Leases Receivable Disclosure [Line Items]
Total Loans	¥ 44,944,455	¥ 41,268,228

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses (Nonaccrual Status of Loans by Class) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	¥ 943,398	¥ 1,005,133
Nonaccrual loans not requiring an allowance for credit losses	161,402	172,152
Loans held for sale placed on nonaccrual status	14,384	9,205
Commercial | Domestic
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	336,679	401,836
Nonaccrual loans not requiring an allowance for credit losses	103,914	99,657
Commercial | Foreign
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	202,085	246,675
Nonaccrual loans not requiring an allowance for credit losses	50,016	65,242
Residential
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	44,874	47,910
Nonaccrual loans not requiring an allowance for credit losses	4,177	3,962
Card
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	70,093	67,159
Nonaccrual loans not requiring an allowance for credit losses	0	0
Krungsri
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	255,876	211,705
Nonaccrual loans not requiring an allowance for credit losses	3,286	3,286
Other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	33,791	29,848
Nonaccrual loans not requiring an allowance for credit losses	¥ 9	¥ 5

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, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	¥ 12,217	¥ 18,052
Commercial | Domestic
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	2,209	10,033
Commercial | Foreign
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	3,534	2,247
Residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	276	378
Card
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	8	9
MUAH
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income		51
Krungsri
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	4,641	3,250
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Recognized interest income	¥ 1,549	¥ 2,084

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses (Troubled Debt Restructurings by Class) (Detail) ¥ in Millions	6 Months Ended
	Sep. 30, 2023 JPY (¥)
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	¥ 139,227
Troubled debt restructurings, Post-modification outstanding recorded investment	138,753
Troubled debt restructurings that subsequently defaulted, Recorded Investment	6,364
Commercial | Domestic
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	37,312
Troubled debt restructurings, Post-modification outstanding recorded investment	37,312
Troubled debt restructurings that subsequently defaulted, Recorded Investment	1,830
Commercial | Foreign
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	17,057
Troubled debt restructurings, Post-modification outstanding recorded investment	17,057
Troubled debt restructurings that subsequently defaulted, Recorded Investment	0
Residential
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	8,697
Troubled debt restructurings, Post-modification outstanding recorded investment	8,697
Troubled debt restructurings that subsequently defaulted, Recorded Investment	95
Card
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	11,408
Troubled debt restructurings, Post-modification outstanding recorded investment	10,934
Troubled debt restructurings that subsequently defaulted, Recorded Investment	1,410
MUAH
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	8,216
Troubled debt restructurings, Post-modification outstanding recorded investment	8,216
Troubled debt restructurings that subsequently defaulted, Recorded Investment	0
Krungsri
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	48,899
Troubled debt restructurings, Post-modification outstanding recorded investment	48,899
Troubled debt restructurings that subsequently defaulted, Recorded Investment	1,827
Other
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	7,638
Troubled debt restructurings, Post-modification outstanding recorded investment	7,638
Troubled debt restructurings that subsequently defaulted, Recorded Investment	¥ 1,202

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses (Loan Modifications) (Details) ¥ in Millions	6 Months Ended
	Sep. 30, 2023 JPY (¥)
Commercial | Domestic | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 2,909
Percentage of Total Class of Loans	0.01%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Domestic | Term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 146,968
Percentage of Total Class of Loans	0.27%
Loans Modified within 12 months of Subsequent Default	¥ 2,676
Commercial | Domestic | Combination of interest rate reduction and term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 4,774
Percentage of Total Class of Loans	0.01%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Domestic | Combination of term extension and principal forgiveness
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Domestic | All other modifications and combinations
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Foreign | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Foreign | Term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 101,054
Percentage of Total Class of Loans	0.22%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Foreign | Combination of interest rate reduction and term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Foreign | Combination of term extension and principal forgiveness
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Commercial | Foreign | All other modifications and combinations
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Residential | Foreign | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Residential | Foreign | Term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 8,491
Percentage of Total Class of Loans	0.07%
Loans Modified within 12 months of Subsequent Default	¥ 60
Residential | Foreign | Combination of interest rate reduction and term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Residential | Foreign | Combination of term extension and principal forgiveness
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Residential | Foreign | All other modifications and combinations
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Card | Foreign | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Card | Foreign | Term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Card | Foreign | Combination of interest rate reduction and term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 12,480
Percentage of Total Class of Loans	2.61%
Loans Modified within 12 months of Subsequent Default	¥ 1,472
Card | Foreign | Combination of term extension and principal forgiveness
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 121
Percentage of Total Class of Loans	0.03%
Loans Modified within 12 months of Subsequent Default	¥ 1
Card | Foreign | All other modifications and combinations
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Krungsri | Foreign | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 389
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 113
Krungsri | Foreign | Term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 193,354
Percentage of Total Class of Loans	2.21%
Loans Modified within 12 months of Subsequent Default	¥ 1,854
Krungsri | Foreign | Combination of interest rate reduction and term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 2,134
Percentage of Total Class of Loans	0.02%
Loans Modified within 12 months of Subsequent Default	¥ 122
Krungsri | Foreign | Combination of term extension and principal forgiveness
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 464
Percentage of Total Class of Loans	0.01%
Loans Modified within 12 months of Subsequent Default	¥ 834
Krungsri | Foreign | All other modifications and combinations
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 884
Percentage of Total Class of Loans	0.01%
Loans Modified within 12 months of Subsequent Default	¥ 142
Other | Foreign | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 250
Percentage of Total Class of Loans	0.01%
Loans Modified within 12 months of Subsequent Default	¥ 185
Other | Foreign | Term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 1,569
Percentage of Total Class of Loans	0.09%
Loans Modified within 12 months of Subsequent Default	¥ 290
Other | Foreign | Combination of interest rate reduction and term extension
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 149
Percentage of Total Class of Loans	0.01%
Loans Modified within 12 months of Subsequent Default	¥ 0
Other | Foreign | Combination of term extension and principal forgiveness
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0
Other | Foreign | All other modifications and combinations
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis at the Period End	¥ 0
Percentage of Total Class of Loans	0%
Loans Modified within 12 months of Subsequent Default	¥ 0

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses (Financial Effect of Modifications) (Details) ¥ in Millions	6 Months Ended
	Sep. 30, 2023 JPY (¥)
Commercial | Domestic
Financing Receivable, Modifications [Line Items]
Weighted average interest rate decrease from modification	0.06%
Weighted average term increase from modification	9 months 18 days
Commercial | Foreign
Financing Receivable, Modifications [Line Items]
Weighted average term increase from modification	6 months
Residential
Financing Receivable, Modifications [Line Items]
Weighted average term increase from modification	1 year 3 months 18 days
Card
Financing Receivable, Modifications [Line Items]
Weighted average interest rate decrease from modification	15.24%
Weighted average term increase from modification	3 years
Decrease in loan principal from modification	¥ 404
Krungsri
Financing Receivable, Modifications [Line Items]
Weighted average interest rate decrease from modification	1.24%
Weighted average term increase from modification	1 year 8 months 12 days
Decrease in loan principal from modification	¥ 484
Other
Financing Receivable, Modifications [Line Items]
Weighted average interest rate decrease from modification	3.40%
Weighted average term increase from modification	3 years

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses (Aging Analysis) (Details) ¥ in Millions	6 Months Ended
	Sep. 30, 2023 JPY (¥)
Current
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	¥ 711,205
1-3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	16,841
Greater Than 3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	13,628
Commercial | Current | Domestic
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	266,915
Commercial | Current | Foreign
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	108,618
Commercial | 1-3 months Past Due | Domestic
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	305
Commercial | 1-3 months Past Due | Foreign
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	0
Commercial | Greater Than 3 months Past Due | Domestic
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	470
Commercial | Greater Than 3 months Past Due | Foreign
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	0
Residential | Current
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	16,094
Residential | 1-3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	948
Residential | Greater Than 3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	214
Card | Current
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	16,816
Card | 1-3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	4,270
Card | Greater Than 3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	1,973
Krungsri | Current
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	298,694
Krungsri | 1-3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	10,727
Krungsri | Greater Than 3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	10,783
Other | Current
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	4,068
Other | 1-3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	591
Other | Greater Than 3 months Past Due
Financing Receivable, Modifications [Line Items]
Payment Status (Amortized Cost Basis at the Period End)	¥ 188

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses (Credit Quality Indicators of Loans and Year of Origination by Class) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	¥ 124,839,339	¥ 120,356,472
Commercial | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	24,683,463	32,957,651
Year 2	17,014,732	10,100,587
Year 3	8,183,201	8,626,319
Year 4	7,037,786	5,653,421
Year 5	4,794,778	4,385,807
Prior	11,556,449	9,366,641
Revolving Loans Amortized Cost Basis	26,933,190	25,743,172
Revolving Loans Converted to Term Loans Amortized Cost Basis	48,340	15,050
Total	100,251,939	96,848,648
Commercial | Domestic
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	55,325,992	55,626,058
Commercial | Domestic | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	14,475,541	20,132,474
Year 2	8,962,771	6,099,692
Year 3	5,386,826	6,675,895
Year 4	5,862,545	4,002,329
Year 5	3,592,584	3,214,528
Prior	9,224,351	7,406,590
Revolving Loans Amortized Cost Basis	7,763,498	8,006,891
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	55,268,116	55,538,399
Commercial | Domestic | Normal | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	14,320,810	19,867,845
Year 2	8,821,506	5,957,659
Year 3	5,254,183	6,472,135
Year 4	5,694,307	3,823,755
Year 5	3,446,184	3,126,146
Prior	8,559,902	6,722,981
Revolving Loans Amortized Cost Basis	7,518,069	7,722,379
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	53,614,961	53,692,900
Commercial | Domestic | Close Watch | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	146,705	222,202
Year 2	126,472	124,499
Year 3	122,444	172,270
Year 4	140,338	114,534
Year 5	80,540	74,635
Prior	551,639	567,514
Revolving Loans Amortized Cost Basis	224,428	262,686
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	1,392,566	1,538,340
Commercial | Domestic | Likely to become Bankrupt or Legally/Virtually Bankrupt | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	8,026	42,427
Year 2	14,793	17,534
Year 3	10,199	31,490
Year 4	27,900	64,040
Year 5	65,860	13,747
Prior	112,810	116,095
Revolving Loans Amortized Cost Basis	21,001	21,826
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	260,589	307,159
Commercial | Domestic | Gross charge-offs | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	1,896
Year 2	22,519
Year 3	1,213
Year 4	918
Year 5	583
Prior	460
Revolving Loans Amortized Cost Basis	865
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	28,454
Commercial | Foreign
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	45,980,946	42,189,672
Commercial | Foreign | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	10,207,922	12,825,177
Year 2	8,051,961	4,000,895
Year 3	2,796,375	1,950,424
Year 4	1,175,241	1,651,092
Year 5	1,202,194	1,171,279
Prior	2,332,098	1,960,051
Revolving Loans Amortized Cost Basis	19,169,692	17,736,281
Revolving Loans Converted to Term Loans Amortized Cost Basis	48,340	15,050
Total	44,983,823	41,310,249
Commercial | Foreign | Normal | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	9,976,734	12,508,547
Year 2	7,886,252	3,931,278
Year 3	2,769,053	1,857,934
Year 4	1,131,884	1,577,120
Year 5	1,070,727	1,083,934
Prior	2,144,663	1,824,977
Revolving Loans Amortized Cost Basis	18,851,641	17,540,822
Revolving Loans Converted to Term Loans Amortized Cost Basis	48,340	15,050
Total	43,879,294	40,339,662
Commercial | Foreign | Close Watch | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	179,305	262,388
Year 2	145,486	34,656
Year 3	27,233	60,637
Year 4	25,793	50,210
Year 5	113,147	71,966
Prior	122,666	79,450
Revolving Loans Amortized Cost Basis	303,862	174,436
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	917,492	733,743
Commercial | Foreign | Likely to become Bankrupt or Legally/Virtually Bankrupt | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	51,883	54,242
Year 2	20,223	34,961
Year 3	89	31,853
Year 4	17,564	23,762
Year 5	18,320	15,379
Prior	64,769	55,624
Revolving Loans Amortized Cost Basis	14,189	21,023
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	187,037	236,844
Commercial | Foreign | Gross charge-offs | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	176
Year 2	330
Year 3	959
Year 4	401
Year 5	149
Prior	0
Revolving Loans Amortized Cost Basis	6,474
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	8,489
Residential
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	12,597,905	12,874,855
Residential | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	244,078	688,000
Year 2	673,841	747,161
Year 3	731,671	607,237
Year 4	591,262	919,359
Year 5	892,586	811,469
Prior	9,442,305	9,077,669
Revolving Loans Amortized Cost Basis	22,162	23,960
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	12,597,905	12,874,855
Residential | Gross charge-offs | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	0
Year 2	0
Year 3	0
Year 4	6
Year 5	18
Prior	435
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	459
Residential | Accrual | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	244,072	687,800
Year 2	673,649	747,121
Year 3	731,530	607,047
Year 4	591,025	918,781
Year 5	891,988	810,933
Prior	9,401,590	9,034,589
Revolving Loans Amortized Cost Basis	20,257	22,093
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	12,554,111	12,828,364
Residential | Nonaccrual | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	6	200
Year 2	192	40
Year 3	141	190
Year 4	237	578
Year 5	598	536
Prior	40,715	43,080
Revolving Loans Amortized Cost Basis	1,905	1,867
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	43,794	46,491
Card
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	478,382	472,842
Card | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	0	12
Year 2	82	147
Year 3	194	240
Year 4	266	239
Year 5	237	181
Prior	709	587
Revolving Loans Amortized Cost Basis	406,199	403,687
Revolving Loans Converted to Term Loans Amortized Cost Basis	70,695	67,749
Total	478,382	472,842
Card | Gross charge-offs | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	6
Year 2	17
Year 3	62
Year 4	51
Year 5	49
Prior	82
Revolving Loans Amortized Cost Basis	4,047
Revolving Loans Converted to Term Loans Amortized Cost Basis	5,844
Total	10,158
Card | Accrual | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	0	1
Year 2	4	7
Year 3	6	10
Year 4	8	8
Year 5	7	9
Prior	40	37
Revolving Loans Amortized Cost Basis	393,455	391,237
Revolving Loans Converted to Term Loans Amortized Cost Basis	14,769	14,374
Total	408,289	405,683
Card | Nonaccrual | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	0	11
Year 2	78	140
Year 3	188	230
Year 4	258	231
Year 5	230	172
Prior	669	550
Revolving Loans Amortized Cost Basis	12,744	12,450
Revolving Loans Converted to Term Loans Amortized Cost Basis	55,926	53,375
Total	70,093	67,159
Krungsri
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	8,747,708	7,782,635
Krungsri | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	1,193,301	1,824,628
Year 2	1,728,989	1,046,959
Year 3	925,488	654,933
Year 4	560,513	692,616
Year 5	574,963	515,731
Prior	964,264	605,053
Revolving Loans Amortized Cost Basis	2,784,735	2,427,923
Revolving Loans Converted to Term Loans Amortized Cost Basis	15,455	14,792
Total	8,747,708	7,782,635
Krungsri | Gross charge-offs | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	358
Year 2	11,594
Year 3	11,552
Year 4	6,355
Year 5	6,036
Prior	9,473
Revolving Loans Amortized Cost Basis	14,649
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	60,017
Krungsri | Performing | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	1,130,458	1,689,034
Year 2	1,534,215	956,470
Year 3	822,929	570,865
Year 4	478,441	553,616
Year 5	451,429	406,258
Prior	726,205	459,322
Revolving Loans Amortized Cost Basis	2,616,328	2,292,418
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	7,760,005	6,927,983
Krungsri | Under-Performing | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	52,188	108,770
Year 2	135,884	66,555
Year 3	72,846	67,504
Year 4	65,469	111,435
Year 5	96,467	85,928
Prior	172,772	98,103
Revolving Loans Amortized Cost Basis	136,201	104,652
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	731,827	642,947
Krungsri | Non-Performing | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	10,655	26,824
Year 2	58,890	23,934
Year 3	29,713	16,564
Year 4	16,603	27,565
Year 5	27,067	23,545
Prior	65,287	47,628
Revolving Loans Amortized Cost Basis	32,206	30,853
Revolving Loans Converted to Term Loans Amortized Cost Basis	15,455	14,792
Total	255,876	211,705
Other
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Total	1,708,406	1,410,410
Other | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	461,916	551,560
Year 2	381,708	190,786
Year 3	158,192	108,148
Year 4	82,994	48,867
Year 5	40,010	19,875
Prior	117,397	80,252
Revolving Loans Amortized Cost Basis	466,189	410,922
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	1,708,406	1,410,410
Other | Gross charge-offs | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	228
Year 2	5,976
Year 3	3,602
Year 4	1,082
Year 5	557
Prior	1,571
Revolving Loans Amortized Cost Basis	2,913
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	15,929
Other | Accrual | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	461,455	549,274
Year 2	375,823	187,638
Year 3	155,147	106,522
Year 4	81,668	47,235
Year 5	38,720	17,832
Prior	110,971	75,726
Revolving Loans Amortized Cost Basis	450,831	396,334
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	1,674,615	1,380,561
Other | Nonaccrual | Excluding loans held for sale and covered loans
Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items]
Year 1	461	2,286
Year 2	5,885	3,148
Year 3	3,045	1,626
Year 4	1,326	1,632
Year 5	1,290	2,043
Prior	6,426	4,526
Revolving Loans Amortized Cost Basis	15,358	14,588
Revolving Loans Converted to Term Loans Amortized Cost Basis	0	0
Total	¥ 33,791	¥ 29,849

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses (Changes in Allowance for Credit Losses by Portfolio Segment) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	¥ 1,272,898	¥ 1,470,701
Provision for (reversal of) credit losses	61,772	(97,785)
Charge-offs	123,506	211,367
Recoveries collected	32,565	29,825
Net charge-offs	90,941	181,542
Other	51,028	65,863
Balance at end of period	1,294,757	1,257,237
ASU 2022-02
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Other	18,869
Commercial
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	719,589	934,086
Provision for (reversal of) credit losses	(17,974)	(164,085)
Charge-offs	36,943	130,524
Recoveries collected	9,720	6,096
Net charge-offs	27,223	124,428
Other	1,580	12,307
Balance at end of period	675,972	657,880
Residential
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	59,747	69,887
Provision for (reversal of) credit losses	433	(5,867)
Charge-offs	459	110
Recoveries collected	2	11
Net charge-offs	457	99
Other	0	0
Balance at end of period	59,723	63,921
Card
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	42,469	40,768
Provision for (reversal of) credit losses	10,255	10,326
Charge-offs	10,158	8,867
Recoveries collected	393	431
Net charge-offs	9,765	8,436
Other	(7,666)	0
Balance at end of period	35,293	42,658
MUAH
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	3,428	30,365
Provision for (reversal of) credit losses		4,792
Charge-offs		10,083
Recoveries collected		2,270
Net charge-offs		7,813
Other		3,191
Balance at end of period	1,151	30,535
Krungsri
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	358,031	322,386
Provision for (reversal of) credit losses	47,303	39,380
Charge-offs	60,017	38,792
Recoveries collected	13,959	12,028
Net charge-offs	46,058	26,764
Other	45,955	40,167
Balance at end of period	405,231	375,169
Other
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	93,062	73,209
Provision for (reversal of) credit losses	21,755	17,669
Charge-offs	15,929	22,991
Recoveries collected	8,491	8,989
Net charge-offs	7,438	14,002
Other	11,159	10,198
Balance at end of period	¥ 118,538	¥ 87,074

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, 2023	Sep. 30, 2022	Mar. 31, 2022	Mar. 31, 2021
Goodwill [Roll Forward]
Goodwill, at beginning of period	¥ 889,524	¥ 1,118,889
Accumulated impairment losses, at beginning of period	(592,752)	(723,492)
Goodwill, Net at beginning of period	296,772	303,611
Foreign currency translation adjustments and other	22,424	54,093
Goodwill, at end of period	971,075	1,172,982	¥ 1,118,889
Accumulated impairment losses, at end of period	(592,752)	(723,492)	(723,492)
Goodwill, Net at end of period	378,323	341,022	303,611
Goodwill, fully impaired before April 1, 2022	1,900,019
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Goodwill [Roll Forward]
Goodwill acquired during the six months			59,127	¥ 0
Less: Goodwill, net of accumulated impairment losses in transferred business of MUFG Union Bank	¥ 0	¥ (108,468)	¥ 0	¥ (91,786)

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Carrying Amount of Other Intangible Assets by Major Class) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Intangible assets subject to amortization:
Finite-lived intangible assets	¥ 1,233,021	¥ 1,166,265
Intangible assets not subject to amortization:
Other	7,873	7,958
Total	1,240,894	1,174,223
Software
Intangible assets subject to amortization:
Finite-lived intangible assets	887,780	833,297
Customer relationships
Intangible assets subject to amortization:
Finite-lived intangible assets	241,517	232,911
Core deposit intangibles
Intangible assets subject to amortization:
Finite-lived intangible assets	50,862	50,176
Trade names
Intangible assets subject to amortization:
Finite-lived intangible assets	39,647	38,771
Other
Intangible assets subject to amortization:
Finite-lived intangible assets	¥ 13,215	¥ 11,110

Lease Transactions (Detail)

Lease Transactions (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Sales type and direct financing leases:
Finance income on net investment	¥ 68,780	¥ 61,812
Operating leases:
Lease income	3,937	1,799
Total	¥ 72,717	¥ 63,611

Pledged Assets and Collateral_2

Pledged Assets and Collateral (Assets Mortgaged, Pledged, or Otherwise Subject to Lien) (Detail) ¥ in Millions	Sep. 30, 2023 JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 43,471,874
Trading account securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	7,820,667
Investment securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	23,430,643
Loans
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	12,197,635
Other
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 22,929

Pledged Assets and Collateral_3

Pledged Assets and Collateral (Pledged Assets Classified by Type of Liabilities) (Detail) ¥ in Millions	Sep. 30, 2023 JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 43,471,874
Deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	14,911
Payables under repurchase agreements and securities lending transactions
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	20,906,911
Other short-term borrowings and long-term debt
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	22,473,103
Other
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 76,949

Pledged Assets and Collateral_4

Pledged Assets and Collateral (Narrative) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Financial Instruments Pledged as Collateral [Abstract]
Investment securities pledged for acting as a collection agent of public funds	¥ 21,191,472
Cash collateral pledged for derivative transactions included in Other assets	3,569,638	¥ 2,585,837
Cash collateral received for derivative transactions included in Other liabilities	¥ 1,561,905	¥ 1,318,338

Severance Indemnities and Pen_3

Severance Indemnities and Pension Plans (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Foreign offices and subsidiaries | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	¥ 6,141	¥ 8,281
Interest cost on projected benefit obligation	4,345	7,667
Expected return on plan assets	(5,574)	(18,381)
Amortization of net actuarial loss (gain)	837	3,896
Amortization of prior service cost	(435)	(1,607)
Loss (gain) on settlements and curtailment	974	0
Net periodic benefit cost (income)	6,288	(144)
Foreign offices and subsidiaries | Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	30	56
Interest cost on projected benefit obligation	594	340
Expected return on plan assets	(732)	(1,338)
Amortization of net actuarial loss (gain)	584	(77)
Amortization of prior service cost	(208)	(212)
Loss (gain) on settlements and curtailment	0	0
Net periodic benefit cost (income)	268	(1,231)
Domestic subsidiaries | Pension Benefits and SIPs
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the period	17,788	20,580
Interest cost on projected benefit obligation	10,288	7,131
Expected return on plan assets	(41,218)	(42,328)
Amortization of net actuarial loss (gain)	925	346
Amortization of prior service cost	(973)	(650)
Loss (gain) on settlements and curtailment	(6,393)	(2,121)
Net periodic benefit cost (income)	¥ (19,583)	¥ (17,042)

Offsetting of Derivatives, Re_3

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Offsetting Derivative Assets [Abstract]
Derivative assets, Net amounts presented in the condensed consolidated balance sheet	¥ 18,554,000	¥ 12,911,000
Offsetting Securities Borrowed [Abstract]
Receivables under securities borrowing transactions, Net amounts presented in the condensed consolidated balance sheet	5,085,189	4,555,748
Offsetting Derivative Liabilities [Abstract]
Derivative liabilities, Net amounts presented in the condensed consolidated balance sheet	20,105,000	13,833,000
Offsetting Securities Sold under Agreements to Repurchase [Abstract]
Payables under repurchase agreements, Gross amounts of recognized assets/liabilities	35,529,000	42,172,000
Offsetting Securities Loaned [Abstract]
Payables under securities lending transactions, Gross amounts of recognized assets/liabilities	1,098,000	1,212,000
Payables under securities lending transactions, Net amounts presented in the condensed consolidated balance sheet	1,016,655	1,137,693
Offsetting Obligations To Return Securities Received As Collateral [Abstract]
Obligations to return securities received as collateral, Gross amounts of recognized assets/liabilities	6,895,000	6,892,000
Financial Instruments including those of transferred business of MUFG Union Bank
Offsetting Derivative Assets [Abstract]
Derivative assets, Gross amounts of recognized assets/liabilities	18,554,000	12,911,000
Derivative assets, Gross amounts offset in the condensed consolidated balance sheet	0	0
Derivative assets, Net amounts presented in the condensed consolidated balance sheet	18,554,000	12,911,000
Derivative assets, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(14,849,000)	(9,902,000)
Derivative assets, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(1,100,000)	(690,000)
Derivative assets, Net amounts	2,605,000	2,319,000
Offsetting Securities Purchased under Agreements to Resell [Abstract]
Receivables under resale agreements, Gross amounts of recognized assets/liabilities	19,029,000	16,152,000
Receivables under resale agreements, Gross amounts offset in the condensed consolidated balance sheet	(2,659,000)	(2,093,000)
Receivables under resale agreements, Net amounts presented in the condensed consolidated balance sheet	16,370,000	14,059,000
Receivables under resale agreements, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(15,670,000)	(13,391,000)
Receivables under resale agreements, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(9,000)	(32,000)
Receivables under resale agreements, Net amounts	691,000	636,000
Offsetting Securities Borrowed [Abstract]
Receivables under securities borrowing transactions, Gross amounts of recognized assets/liabilities	5,166,000	4,630,000
Receivables under securities borrowing transactions, Gross amounts offset in the condensed consolidated balance sheet	(81,000)	(74,000)
Receivables under securities borrowing transactions, Net amounts presented in the condensed consolidated balance sheet	5,085,000	4,556,000
Receivables under securities borrowing transactions, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(4,811,000)	(4,478,000)
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	274,000	78,000
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]
Financial assets, Gross amounts of recognized assets/liabilities, Total	42,749,000	33,693,000
Financial assets, Gross amounts offset in the condensed consolidated balance sheet, Total	(2,740,000)	(2,167,000)
Financial assets, Net amounts presented in the condensed consolidated balance sheet, Total	40,009,000	31,526,000
Financial assets, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments, Total	(35,330,000)	(27,771,000)
Financial assets, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged, Total	(1,109,000)	(722,000)
Financial assets, Net amounts, Total	3,570,000	3,033,000
Offsetting Derivative Liabilities [Abstract]
Derivative liabilities, Gross amounts of recognized assets/liabilities	20,105,000	13,833,000
Derivative liabilities, Gross amounts offset in the condensed consolidated balance sheet	0	0
Derivative liabilities, Net amounts presented in the condensed consolidated balance sheet	20,105,000	13,833,000
Derivative liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(14,364,000)	(9,668,000)
Derivative liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(2,404,000)	(1,489,000)
Derivative liabilities, Net amounts	3,337,000	2,676,000
Offsetting Securities Sold under Agreements to Repurchase [Abstract]
Payables under repurchase agreements, Gross amounts of recognized assets/liabilities	35,529,000	42,172,000
Payables under repurchase agreements, Gross amounts offset in the condensed consolidated balance sheet	(2,569,000)	(2,040,000)
Payables under repurchase agreements, Net amounts presented in the condensed consolidated balance sheet	32,960,000	40,132,000
Payables under repurchase agreements, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(31,587,000)	(39,232,000)
Payables under repurchase agreements, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(124,000)	(76,000)
Payables under repurchase agreements, Net amounts	1,249,000	824,000
Offsetting Securities Loaned [Abstract]
Payables under securities lending transactions, Gross amounts of recognized assets/liabilities	1,098,000	1,212,000
Payables under securities lending transactions, Gross amounts offset in the condensed consolidated balance sheet	(81,000)	(74,000)
Payables under securities lending transactions, Net amounts presented in the condensed consolidated balance sheet	1,017,000	1,138,000
Payables under securities lending transactions, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(986,000)	(1,108,000)
Payables under securities lending transactions, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged	(11,000)	(18,000)
Payables under securities lending transactions, Net amounts	20,000	12,000
Offsetting Obligations To Return Securities Received As Collateral [Abstract]
Obligations to return securities received as collateral, Gross amounts of recognized assets/liabilities	6,895,000	6,892,000
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	6,895,000	6,892,000
Obligations to return securities received as collateral, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments	(1,437,000)	(1,975,000)
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	5,458,000	4,917,000
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]
Financial liabilities, Gross amounts of recognized assets/liabilities, Total	63,627,000	64,109,000
Financial liabilities, Gross amounts offset in the condensed consolidated balance sheet, Total	(2,650,000)	(2,114,000)
Financial liabilities, Net amounts presented in the condensed consolidated balance sheet, Total	60,977,000	61,995,000
Financial liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Financial instruments, Total	(48,374,000)	(51,983,000)
Financial liabilities, Gross amounts not offset in the condensed consolidated balance sheet, Cash collateral received/pledged, Total	(2,539,000)	(1,583,000)
Financial liabilities, Net amounts, Total	¥ 10,064,000	¥ 8,429,000

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, 2023	Mar. 31, 2023
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 35,529	¥ 42,172
Payables under securities lending transactions	1,098	1,212
Obligations to return securities received as collateral	6,895	6,892
Total	43,522	50,276
Overnight and open
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	11,525	8,593
Payables under securities lending transactions	1,015	947
Obligations to return securities received as collateral	6,233	5,516
Total	18,773	15,056
30 days or less
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	12,729	23,546
Payables under securities lending transactions	0	191
Obligations to return securities received as collateral	256	642
Total	12,985	24,379
31-90 days
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	7,680	8,393
Payables under securities lending transactions	6	5
Obligations to return securities received as collateral	127	404
Total	7,813	8,802
Over 90 days
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	3,595	1,640
Payables under securities lending transactions	77	69
Obligations to return securities received as collateral	279	330
Total	¥ 3,951	¥ 2,039

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, 2023	Mar. 31, 2023
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 35,529	¥ 42,172
Payables under securities lending transactions	1,098	1,212
Obligations to return securities received as collateral	6,895	6,892
Total	43,522	50,276
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	12,686	13,280
Payables under securities lending transactions	254	577
Obligations to return securities received as collateral	4,013	3,956
Total	16,953	17,813
Foreign government and official institution bonds
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	13,357	17,618
Payables under securities lending transactions	7	9
Obligations to return securities received as collateral	965	1,122
Total	14,329	18,749
Corporate bonds
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	908	657
Payables under securities lending transactions	77	70
Obligations to return securities received as collateral	354	400
Total	1,339	1,127
Residential mortgage-backed securities
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	7,563	9,650
Payables under securities lending transactions	0	0
Obligations to return securities received as collateral	0	0
Total	7,563	9,650
Other debt securities
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	454	552
Payables under securities lending transactions	0	0
Obligations to return securities received as collateral	43	46
Total	497	598
Marketable equity securities
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	534	367
Payables under securities lending transactions	735	556
Obligations to return securities received as collateral	1,520	1,368
Total	2,789	2,291
Other
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	27	48
Payables under securities lending transactions	25	0
Obligations to return securities received as collateral	0	0
Total	¥ 52	¥ 48

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, 2023	Sep. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	¥ 16,466,167
Net change during the period	915,544	¥ 1,263,173
Balance at end of period	17,457,394	16,147,508
Accumulated other comprehensive income, net of taxes:
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	844,192	227,033
Net change during the period	840,815	1,198,138
Balance at end of period	1,685,007	1,425,171
Net unrealized losses (gains) on investment securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(883,466)	(674,230)
Net change during the period	(157,542)	(218,267)
Balance at end of period	(1,041,008)	(892,497)
Net debt valuation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	3,268	(14,538)
Net change during the period	(22,260)	45,485
Balance at end of period	(18,992)	30,947
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	594	5,969
Net change during the period	13	(21,686)
Balance at end of period	607	(15,717)
Defined benefit plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	8,304	29,124
Net change during the period	48,926	(16,948)
Balance at end of period	57,230	12,176
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	1,715,492	880,708
Net change during the period	971,678	1,409,554
Balance at end of period	¥ 2,687,170	¥ 2,290,262

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, 2023	Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	¥ 915,544	¥ 1,263,173
Other comprehensive income attributable to Mitsubishi UFJ Financial Group	840,815	1,198,138
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	(147,389)	(534,655)
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	23,204	132,963
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(124,185)	(401,692)
Reclassification adjustment, Current Period, before Tax	(51,965)	296,064
Reclassification adjustment, Current Period, Tax (expense) or benefit	14,020	(88,081)
Reclassification adjustment, Current Period, Net of Tax	(37,945)	207,983
Other Comprehensive Income (Loss), before Tax	(199,354)	(238,591)
Other Comprehensive Income (Loss), Tax (expense) or benefit	37,224	44,882
Total	(162,130)	(193,709)
Net unrealized gains (losses) on investment securities attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	(4,588)	24,558
Net unrealized losses on investment securities attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	(157,542)	(218,267)
Net debt valuation adjustments:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(32,387)	65,470
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	9,917	(20,047)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(22,470)	45,423
Reclassification adjustment, Current Period, before Tax	302	89
Reclassification adjustment, Current Period, Tax (expense) or benefit	(92)	(27)
Reclassification adjustment, Current Period, Net of Tax	210	62
Other Comprehensive Income (Loss), before Tax	(32,085)	65,559
Other Comprehensive Income (Loss), Tax (expense) or benefit	9,825	(20,074)
Total	(22,260)	45,485
Net debt valuation adjustments attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	0	0
Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	(22,260)	45,485
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	3,029	(22,892)
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	(599)	6,571
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	2,430	(16,321)
Reclassification adjustment, Current Period, before Tax	(3,013)	(6,701)
Reclassification adjustment, Current Period, Tax (expense) or benefit	598	1,662
Reclassification adjustment, Current Period, Net of Tax	(2,415)	(5,039)
Other Comprehensive Income (Loss), before Tax	16	(29,593)
Other Comprehensive Income (Loss), Tax (expense) or benefit	(1)	8,233
Total	15	(21,360)
Net unrealized gains on derivatives qualifying for cash flow hedges attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	2	326
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]
Total	13	(21,686)
Defined benefit plans:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	75,036	(23,354)
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	(22,992)	6,682
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	52,044	(16,672)
Reclassification adjustment, Current Period, before Tax	(4,612)	(443)
Reclassification adjustment, Current Period, Tax (expense) or benefit	1,533	250
Reclassification adjustment, Current Period, Net of Tax	(3,079)	(193)
Other Comprehensive Income (Loss), before Tax	70,424	(23,797)
Other Comprehensive Income (Loss), Tax (expense) or benefit	(21,459)	6,932
Total	48,965	(16,865)
Defined benefit plans attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	39	83
Defined benefit plans attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	48,926	(16,948)
Foreign currency translation adjustments:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	1,200,624	1,654,830
Other Comprehensive Income (Loss) before Reclassifications, Tax (expense) or benefit	(146,735)	(196,704)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	1,053,889	1,458,126
Reclassification adjustment, Current Period, before Tax	(4,231)	(12,257)
Reclassification adjustment, Current Period, Tax (expense) or benefit	1,296	3,753
Reclassification adjustment, Current Period, Net of Tax	(2,935)	(8,504)
Other Comprehensive Income (Loss), before Tax	1,196,393	1,642,573
Other Comprehensive Income (Loss), Tax (expense) or benefit	(145,439)	(192,951)
Total	1,050,954	1,449,622
Foreign currency translation adjustments attributable to noncontrolling interests
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	79,276	40,068
Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total	¥ 971,678	¥ 1,409,554

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, 2023	Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)—net	¥ (743,395)	¥ 493,309
Equity in earnings of equity method investees—net	(214,835)	(186,906)
Interest income on Loans, including fees	(2,011,363)	(1,201,227)
Other non-interest income	(86,876)	(38,856)
Other non-interest expenses	(202,385)	(156,407)
Total before tax	(284,322)	1,291,685
Income tax expense (benefit)	15,864	(340,290)
Net of tax	(268,458)	951,395
Amount reclassified out of Accumulated OCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(63,519)	276,752
Income tax expense (benefit)	17,355	(82,443)
Net of tax	(46,164)	194,309
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 (losses)—net	(52,655)	(9,738)
Amount reclassified out of Accumulated OCI | Impairment losses on investment securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)—net	2	299,281
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 (losses)—net	688	6,521
Total before tax	(51,965)	296,064
Income tax expense (benefit)	14,020	(88,081)
Net of tax	(37,945)	207,983
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	302	89
Total before tax	302	89
Income tax expense (benefit)	(92)	(27)
Net of tax	210	62
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]
Total before tax	(3,013)	(6,701)
Income tax expense (benefit)	598	1,662
Net of tax	(2,415)	(5,039)
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	0	(5,173)
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—net	(3,013)	(1,528)
Amount reclassified out of Accumulated OCI | Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	2,346	4,165
Amount reclassified out of Accumulated OCI | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	(1,616)	(2,469)
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	(5,342)	(2,139)
Amount reclassified out of Accumulated OCI | Defined benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(4,612)	(443)
Income tax expense (benefit)	1,533	250
Net of tax	(3,079)	(193)
Amount reclassified out of Accumulated OCI | Foreign currency translation adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest income	(4,231)	(12,257)
Total before tax	(4,231)	(12,257)
Income tax expense (benefit)	1,296	3,753
Net of tax	¥ (2,935)	¥ (8,504)

Derivative Financial Instrume_3

Derivative Financial Instruments (Notional Amounts of Derivative Contracts) (Detail) - JPY (¥) ¥ in Trillions	Sep. 30, 2023	Mar. 31, 2023
Derivative [Line Items]
Notional amounts of derivatives	¥ 2,081.5	¥ 1,953.1
Interest rate contracts
Derivative [Line Items]
Notional amounts of derivatives	1,742.9	1,625.6
Foreign exchange contracts
Derivative [Line Items]
Notional amounts of derivatives	322.4	307.4
Equity contracts
Derivative [Line Items]
Notional amounts of derivatives	6	5.3
Commodity contracts
Derivative [Line Items]
Notional amounts of derivatives	0.2	0.1
Credit derivatives
Derivative [Line Items]
Notional amounts of derivatives	6.7	11.5
Other
Derivative [Line Items]
Notional amounts of derivatives	¥ 3.3	¥ 3.2

Derivative Financial Instrume_4

Derivative Financial Instruments (Fair Value Information on Derivative Instruments Recorded on Condensed Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Billions	Sep. 30, 2023	Mar. 31, 2023
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	¥ 18,554	¥ 12,911
Fair value of derivative liabilities	20,105	13,833
Interest rate contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	11,151	7,445
Fair value of derivative liabilities	12,809	8,697
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	7,184	5,281
Fair value of derivative liabilities	7,202	5,018
Equity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	150	90
Fair value of derivative liabilities	125	128
Commodity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	19	10
Fair value of derivative liabilities	19	10
Credit derivatives
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	50	80
Fair value of derivative liabilities	72	90
Other
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	5
Fair value of derivative liabilities	(122)	(110)
Not designated as hedges
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	18,546	12,906
Fair value of derivative liabilities	20,105	13,833
Not designated as hedges | Interest rate contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	11,151	7,445
Fair value of derivative liabilities	12,809	8,697
Not designated as hedges | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	7,176	5,276
Fair value of derivative liabilities	7,202	5,018
Not designated as hedges | Equity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	150	90
Fair value of derivative liabilities	125	128
Not designated as hedges | Commodity contracts
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	19	10
Fair value of derivative liabilities	19	10
Not designated as hedges | Credit derivatives
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	50	80
Fair value of derivative liabilities	72	90
Not designated as hedges | Other
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	5
Fair value of derivative liabilities	(122)	(110)
Designated as hedges
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	8	5
Fair value of derivative liabilities	0	0
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	8	5
Fair value of derivative liabilities	0	0
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
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Fair value of derivative liabilities	¥ 0	¥ 0

Derivative Financial Instrume_5

Derivative Financial Instruments (Gains and Losses for Trading and Risk Management Derivatives (Not Designated as Hedging Instruments)) (Detail) - JPY (¥) ¥ in Billions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (932)	¥ (115)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(219)	64
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(385)	(168)
Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(268)	(24)
Credit derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(20)	(2)
Other
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(40)	15
Foreign exchange gains (losses) - net
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(393)	(176)
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)	(385)	(168)
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)	(8)	(8)
Trading account profits (losses) - net
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(539)	61
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)	(219)	64
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)	(268)	(24)
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)	(20)	(2)
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)	¥ (32)	¥ 23

Derivative Financial Instrume_6

Derivative Financial Instruments (Protection Sold Through Credit Derivatives) (Detail) - Protection sold - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Credit Derivatives [Line Items]
1 year or less	¥ 483,565	¥ 817,845
1-5 years	2,018,962	3,787,877
Over 5 years	366,814	588,961
Total	2,869,341	5,194,683
(Asset)/liability	(19,559)	(28,356)
Single name credit default swaps:
Credit Derivatives [Line Items]
1 year or less	424,689	780,486
1-5 years	1,113,816	2,535,528
Over 5 years	348,533	577,973
Total	1,887,038	3,893,987
(Asset)/liability	(9,678)	(16,640)
Single name credit default swaps: | Investment grade
Credit Derivatives [Line Items]
1 year or less	321,667	616,504
1-5 years	925,277	2,222,393
Over 5 years	327,235	529,796
Total	1,574,179	3,368,693
(Asset)/liability	(13,488)	(30,117)
Single name credit default swaps: | Non-investment grade
Credit Derivatives [Line Items]
1 year or less	103,022	163,982
1-5 years	188,539	313,135
Over 5 years	21,298	48,177
Total	312,859	525,294
(Asset)/liability	3,810	13,477
Index and basket credit default swaps :
Credit Derivatives [Line Items]
1 year or less	58,876	37,359
1-5 years	905,146	1,252,349
Over 5 years	18,281	10,988
Total	982,303	1,300,696
(Asset)/liability	(9,881)	(11,716)
Index and basket credit default swaps : | Investment grade
Credit Derivatives [Line Items]
1 year or less	56,000	0
1-5 years	905,146	217,259
Over 5 years	18,281	1,596
Total	979,427	218,855
(Asset)/liability	(9,869)	(1,266)
Index and basket credit default swaps : | Non-investment grade
Credit Derivatives [Line Items]
1 year or less	0	37,359
1-5 years	0	599,638
Over 5 years	0	6,200
Total	0	643,197
(Asset)/liability	0	(7,121)
Index and basket credit default swaps : | Not rated
Credit Derivatives [Line Items]
1 year or less	2,876	0
1-5 years	0	435,452
Over 5 years	0	3,192
Total	2,876	438,644
(Asset)/liability	¥ (12)	¥ (3,329)

Derivative Financial Instrume_7

Derivative Financial Instruments (Narrative) (Detail) - JPY (¥) ¥ in Billions	6 Months Ended	12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023
Credit Derivatives:
Credit derivative, purchased credit protection	¥ 17	¥ 27
Credit derivative, purchased credit protection, notional value	2,577	4,880
Credit Risk, Liquidity Risk and Credit-risk-related Contingent Features:
Derivative, net liability position, aggregate fair value	900	800
Collateral already posted, aggregate fair value	338	222
Additional collateral, aggregate fair value	72	70
Assets needed for immediate settlement, aggregate fair value	¥ 165	¥ 116

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, 2023	Mar. 31, 2023
Guarantor Obligations [Line Items]
Contractual or Notional amount	¥ 84,978	¥ 74,741
Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Contractual or Notional amount	5,087	4,975
Performance guarantees
Guarantor Obligations [Line Items]
Contractual or Notional amount	4,697	4,179
Derivative Instruments
Guarantor Obligations [Line Items]
Contractual or Notional amount	53,415	48,363
Liabilities of trust accounts
Guarantor Obligations [Line Items]
Contractual or Notional amount	21,703	17,139
Other
Guarantor Obligations [Line Items]
Contractual or Notional amount	¥ 76	¥ 85

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, 2023	Mar. 31, 2023
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	¥ 84,978	¥ 74,741
Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	5,087	4,975
Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	4,697	4,179
Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	9,784	9,154
Normal | Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	4,972	4,819
Normal | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	4,598	4,066
Normal | Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	9,570	8,885
Close Watch | Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	88	78
Close Watch | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	35	53
Close Watch | Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	123	131
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	10	17
Likely to become Bankrupt or Legally/Virtually Bankrupt | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	27	29
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	37	46
Not rated | Standby letters of credit and financial guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	17	61
Not rated | Performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	37	31
Not rated | Standby letters of credit, financial and performance guarantees
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	¥ 54	¥ 92

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, 2023	Mar. 31, 2023
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 92,387	¥ 88,631
Commercial letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	894	871
Commitments to make investments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 712	¥ 705

Contingent Liabilities (Narrati

Contingent Liabilities (Narrative) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Allowance for repayment of excess interest	¥ 9,070	¥ 12,113

Variable Interest Entities (Ass

Variable Interest Entities (Assets and Liabilities of Consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Variable Interest Entity [Line Items]
Total assets	¥ 392,246,703	¥ 381,735,733
Cash and due from banks	59,953,857	60,050,640
Interest-earning deposits in other banks	48,957,399	53,989,863
Trading account assets	51,177,655	46,168,461
Investment securities	62,689,780	62,261,931
Total liabilities	374,789,309	365,269,566
Deposits	243,806,967	235,276,781
Long-term debt	40,457,710	39,071,755
Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	21,937,525	21,101,620
Cash and due from banks	7,410	8,243
Interest-earning deposits in other banks	62,613	52,031
Trading account assets	1,308,287	1,367,928
Investment securities	2,113,141	2,076,737
Loans	17,349,257	16,598,585
All other assets	1,096,817	998,096
Total liabilities	496,122	614,936
Deposits	0	0
Other short-term borrowings	40,145	45,432
Long-term debt	374,102	406,429
All other liabilities	81,875	163,075
Consolidated VIEs | Consolidated VIEs before Elimination
Variable Interest Entity [Line Items]
Total assets	29,363,940	27,841,574
Cash and due from banks	85,766	80,115
Interest-earning deposits in other banks	154,974	88,657
Trading account assets	1,406,445	1,431,484
Investment securities	2,713,513	2,677,372
Loans	23,876,888	22,538,621
All other assets	1,126,354	1,025,325
Total liabilities	28,699,591	27,220,347
Deposits	6,988,735	6,408,837
Other short-term borrowings	7,666,639	7,247,251
Long-term debt	12,337,682	11,900,840
All other liabilities	1,706,535	1,663,419
Consolidated VIEs | Consolidated VIEs before Elimination | Asset-backed conduits
Variable Interest Entity [Line Items]
Total assets	7,732,815	7,388,845
Cash and due from banks	77,234	71,649
Interest-earning deposits in other banks	30,077	34,521
Trading account assets	68,683	47,606
Investment securities	969,899	1,027,862
Loans	6,539,924	6,185,514
All other assets	46,998	21,693
Total liabilities	7,697,001	7,364,030
Deposits	0	0
Other short-term borrowings	5,880,073	5,587,813
Long-term debt	1,362,328	1,367,234
All other liabilities	454,600	408,983
Consolidated VIEs | Consolidated VIEs before Elimination | Investment funds
Variable Interest Entity [Line Items]
Total assets	1,467,112	1,331,962
Cash and due from banks	901	0
Interest-earning deposits in other banks	116,379	46,157
Trading account assets	327,950	359,777
Investment securities	73,117	65,204
Loans	0	0
All other assets	948,765	860,824
Total liabilities	951,058	830,751
Deposits	0	0
Other short-term borrowings	934,436	817,292
Long-term debt	8,339	7,407
All other liabilities	8,283	6,052
Consolidated VIEs | Consolidated VIEs before Elimination | Special purpose entities created for structured financing
Variable Interest Entity [Line Items]
Total assets	250,614	248,952
Cash and due from banks	0	0
Interest-earning deposits in other banks	3,293	2,593
Trading account assets	8,071	8,624
Investment securities	0	0
Loans	147,264	135,606
All other assets	91,986	102,129
Total liabilities	123,698	127,768
Deposits	0	0
Other short-term borrowings	0	0
Long-term debt	119,496	109,352
All other liabilities	4,202	18,416
Consolidated VIEs | Consolidated VIEs before Elimination | Repackaged instruments
Variable Interest Entity [Line Items]
Total assets	288,371	243,513
Cash and due from banks	7,132	7,882
Interest-earning deposits in other banks	0	0
Trading account assets	136,973	167,007
Investment securities	129,266	53,617
Loans	15,000	15,007
All other assets	0	0
Total liabilities	296,297	245,829
Deposits	0	0
Other short-term borrowings	0	0
Long-term debt	281,304	230,285
All other liabilities	14,993	15,544
Consolidated VIEs | Consolidated VIEs before Elimination | Securitization of the MUFG Group’s assets
Variable Interest Entity [Line Items]
Total assets	10,786,948	10,389,398
Cash and due from banks	0	0
Interest-earning deposits in other banks	1,431	1,434
Trading account assets	0	0
Investment securities	0	0
Loans	10,766,601	10,371,275
All other assets	18,916	16,689
Total liabilities	10,798,823	10,418,160
Deposits	0	0
Other short-term borrowings	0	0
Long-term debt	10,524,243	10,154,662
All other liabilities	274,580	263,498
Consolidated VIEs | Consolidated VIEs before Elimination | Trust arrangements
Variable Interest Entity [Line Items]
Total assets	8,770,532	8,176,795
Cash and due from banks	0	0
Interest-earning deposits in other banks	0	0
Trading account assets	840,042	833,864
Investment securities	1,524,982	1,514,530
Loans	6,405,502	5,828,397
All other assets	6	4
Total liabilities	8,770,460	8,176,907
Deposits	6,988,735	6,408,837
Other short-term borrowings	850,957	840,690
Long-term debt	0	0
All other liabilities	930,768	927,380
Consolidated VIEs | Consolidated VIEs before Elimination | Other
Variable Interest Entity [Line Items]
Total assets	67,548	62,109
Cash and due from banks	499	584
Interest-earning deposits in other banks	3,794	3,952
Trading account assets	24,726	14,606
Investment securities	16,249	16,159
Loans	2,597	2,822
All other assets	19,683	23,986
Total liabilities	62,254	56,902
Deposits	0	0
Other short-term borrowings	1,173	1,456
Long-term debt	41,972	31,900
All other liabilities	19,109	23,546
Consolidated VIEs | The amounts eliminated in consolidation
Variable Interest Entity [Line Items]
Total assets	(7,426,415)	(6,739,954)
Cash and due from banks	(78,356)	(71,872)
Interest-earning deposits in other banks	(92,361)	(36,626)
Trading account assets	(98,158)	(63,556)
Investment securities	(600,372)	(600,635)
Loans	(6,527,631)	(5,940,036)
All other assets	(29,537)	(27,229)
Total liabilities	(16,622,457)	(16,102,106)
Deposits	(1,337)	(302)
Other short-term borrowings	(3,744,249)	(3,696,647)
Long-term debt	(11,935,141)	(11,469,378)
All other liabilities	(941,730)	(935,779)
Consolidated VIEs | The amount of liabilities with recourse to the general credit of the MUFG Group
Variable Interest Entity [Line Items]
Total liabilities	(11,581,012)	(10,503,305)
Deposits	(6,987,398)	(6,408,535)
Other short-term borrowings	(3,882,245)	(3,505,172)
Long-term debt	(28,439)	(25,033)
All other liabilities	¥ (682,930)	¥ (564,565)

Variable Interest Entities (A_2

Variable Interest Entities (Assets and Liabilities of Non-consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Variable Interest Entity [Line Items]
Total assets	¥ 392,246,703	¥ 381,735,733
Total liabilities	374,789,309	365,269,566
Non-consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	309,613,284	247,954,971
Maximum exposure	32,834,986	27,220,521
Total assets	24,304,789	20,616,842
Trading account assets	2,189,535	1,455,494
Investment securities	5,178,269	5,014,606
Loans	16,223,852	13,513,611
All other assets	713,133	633,131
Total liabilities	476,303	295,113
All other liabilities	476,303	295,113
Non-consolidated VIEs | Asset-backed conduits
Variable Interest Entity [Line Items]
Total assets	47,471,678	41,001,958
Maximum exposure	9,089,567	8,062,589
Total assets	7,124,602	6,384,079
Trading account assets	12,163	21,719
Investment securities	2,157,156	2,205,877
Loans	4,942,714	4,142,995
All other assets	12,569	13,488
Total liabilities	18,936	10,823
All other liabilities	18,936	10,823
Non-consolidated VIEs | Investment funds
Variable Interest Entity [Line Items]
Total assets	96,500,851	55,386,213
Maximum exposure	6,697,234	4,930,989
Total assets	4,355,603	3,446,109
Trading account assets	452,953	262,312
Investment securities	168,683	120,436
Loans	3,310,669	2,710,177
All other assets	423,298	353,184
Total liabilities	42,092	27,606
All other liabilities	42,092	27,606
Non-consolidated VIEs | Special purpose entities created for structured financing
Variable Interest Entity [Line Items]
Total assets	66,635,155	54,543,066
Maximum exposure	7,309,836	5,864,814
Total assets	4,838,196	3,907,598
Trading account assets	66,104	80,382
Investment securities	43,255	39,357
Loans	4,685,051	3,749,670
All other assets	43,786	38,189
Total liabilities	382,651	208,100
All other liabilities	382,651	208,100
Non-consolidated VIEs | Repackaged instruments
Variable Interest Entity [Line Items]
Total assets	9,710,418	9,034,058
Maximum exposure	5,016,578	4,372,581
Total assets	4,846,411	4,117,969
Trading account assets	1,436,901	944,795
Investment securities	2,805,459	2,641,384
Loans	427,025	386,793
All other assets	177,026	144,997
Total liabilities	1,342	2,230
All other liabilities	1,342	2,230
Non-consolidated VIEs | Other
Variable Interest Entity [Line Items]
Total assets	89,295,182	87,989,676
Maximum exposure	4,721,771	3,989,548
Total assets	3,139,977	2,761,087
Trading account assets	221,414	146,286
Investment securities	3,716	7,552
Loans	2,858,393	2,523,976
All other assets	56,454	83,273
Total liabilities	31,282	46,354
All other liabilities	¥ 31,282	¥ 46,354

Fees and Commissions Income (De

Fees and Commissions Income (Details of Fees and Commissions Income) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	¥ 881,258	¥ 787,642
Fees and commissions on deposits
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	18,310	27,784
Fees and commissions on remittances and transfers
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	73,427	73,627
Fees and commissions on foreign trading business
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	36,901	35,165
Fees and commissions on credit card business
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	120,071	111,697
Fees and commissions on security-related services
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	132,829	107,541
Fees and commissions on administration and management services for investment funds
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	150,525	133,070
Trust fees
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	62,724	66,832
Guarantee fees
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	25,237	23,481
Insurance commissions
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	26,482	22,259
Fees and commissions on real estate business
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	22,347	21,984
Other fees and commissions
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	¥ 212,405	¥ 164,202

Business Segments (Narrative) (

Business Segments (Narrative) (Details) ¥ in Billions	6 Months Ended
	Sep. 30, 2023 segment	Sep. 30, 2022 JPY (¥)
Segment Reporting Information [Line Items]
Number of operating segments | segment	7
Operating Segments | Digital Service Business Group | Customer Business
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)		¥ 3.5
Operating Segments | Global Corporate & Investment Banking Business Group | Customer Business
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)		0.8
Operating Segments | Global Commercial Banking Business Group | Customer Business
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)		0.3
Operating Segments | Retail & Commercial Banking Business Group | Customer Business
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)		(3)
Operating Segments | Global Markets Business Group | Customer Business
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)		(0.6)
Other
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)		¥ (1)

Business Segments (Financial In

Business Segments (Financial Information by Business Segment) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Business segment information
Net revenue:	¥ 2,504,500	¥ 2,344,900
Net interest income	1,244,871	1,166,734
Operating expenses	1,426,600	1,455,300
Operating profit (loss)	1,077,900	889,600
Fixed assets:	1,376,900	1,303,300
Increase in fixed assets	114,000	87,200
Depreciation	90,200	74,600
BK and TB
Business segment information
Net revenue:	1,509,800	1,176,100
Net interest income	886,500	1,160,000
Net fees	408,800	320,900
Other	214,500	(304,800)
Other than BK and TB
Business segment information
Net revenue:	994,700	1,168,800
Operating Segments | Customer Business
Business segment information
Net revenue:	2,097,800	1,970,900
Operating expenses	1,159,100	1,249,200
Operating profit (loss)	938,700	721,700
Fixed assets:	736,600	653,100
Increase in fixed assets	85,600	67,200
Depreciation	66,100	52,500
Operating Segments | BK and TB | Customer Business
Business segment information
Net revenue:	1,174,100	927,000
Net interest income	680,600	497,600
Net fees	425,300	360,200
Other	68,200	69,200
Operating Segments | Other than BK and TB | Customer Business
Business segment information
Net revenue:	923,700	1,043,900
Operating Segments | Digital Service Business Group | Customer Business
Business segment information
Net revenue:	380,200	371,700
Operating expenses	264,200	259,000
Operating profit (loss)	116,000	112,700
Fixed assets:	172,800	147,500
Increase in fixed assets	19,100	15,200
Depreciation	7,000	5,100
Operating Segments | Digital Service Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	124,300	127,200
Net interest income	106,900	106,700
Net fees	16,600	19,200
Other	800	1,300
Operating Segments | Digital Service Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	255,900	244,500
Operating Segments | Retail & Commercial Banking Business Group | Customer Business
Business segment information
Net revenue:	318,800	283,800
Operating expenses	230,800	227,600
Operating profit (loss)	88,000	56,200
Fixed assets:	211,000	199,100
Increase in fixed assets	20,800	21,000
Depreciation	12,000	11,000
Operating Segments | Retail & Commercial Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	220,000	194,600
Net interest income	115,100	90,800
Net fees	91,100	87,200
Other	13,800	16,600
Operating Segments | Retail & Commercial Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	98,800	89,200
Operating Segments | Japanese Corporate & Investment Banking Business Group | Customer Business
Business segment information
Net revenue:	463,800	345,300
Operating expenses	169,400	165,800
Operating profit (loss)	294,400	179,500
Fixed assets:	161,000	157,100
Increase in fixed assets	22,300	17,700
Depreciation	21,200	18,000
Operating Segments | Japanese Corporate & Investment Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	376,800	277,500
Net interest income	237,400	153,000
Net fees	104,900	91,900
Other	34,500	32,600
Operating Segments | Japanese Corporate & Investment Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	87,000	67,800
Operating Segments | Global Commercial Banking Business Group | Customer Business
Business segment information
Net revenue:	310,900	447,400
Operating expenses	174,900	305,000
Operating profit (loss)	136,000	142,400
Fixed assets:	1,300	1,200
Increase in fixed assets	200	400
Depreciation	100	100
Operating Segments | Global Commercial Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	19,600	27,300
Net interest income	19,100	27,300
Net fees	0	0
Other	500	0
Operating Segments | Global Commercial Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	291,300	420,100
Operating Segments | Asset Management & Investor Services Business Group | Customer Business
Business segment information
Net revenue:	205,700	177,200
Operating expenses	145,700	123,400
Operating profit (loss)	60,000	53,800
Fixed assets:	22,100	13,700
Increase in fixed assets	7,300	3,200
Depreciation	4,000	2,800
Operating Segments | Asset Management & Investor Services Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	56,800	53,000
Net interest income	6,500	5,300
Net fees	50,300	47,800
Other	0	(100)
Operating Segments | Asset Management & Investor Services Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	148,900	124,200
Operating Segments | Global Corporate & Investment Banking Business Group | Customer Business
Business segment information
Net revenue:	418,400	345,500
Operating expenses	174,100	168,400
Operating profit (loss)	244,300	177,100
Fixed assets:	168,400	134,500
Increase in fixed assets	15,900	9,700
Depreciation	21,800	15,500
Operating Segments | Global Corporate & Investment Banking Business Group | BK and TB | Customer Business
Business segment information
Net revenue:	376,600	247,400
Net interest income	195,600	114,500
Net fees	162,400	114,100
Other	18,600	18,800
Operating Segments | Global Corporate & Investment Banking Business Group | Other than BK and TB | Customer Business
Business segment information
Net revenue:	41,800	98,100
Operating Segments | Global Markets Business Group
Business segment information
Net revenue:	381,700	360,600
Operating expenses	149,900	136,300
Operating profit (loss)	231,800	224,300
Fixed assets:	108,400	108,700
Increase in fixed assets	13,100	10,400
Depreciation	15,500	13,300
Operating Segments | Global Markets Business Group | BK and TB
Business segment information
Net revenue:	229,400	225,600
Net interest income	119,300	604,600
Net fees	(9,300)	(8,600)
Other	119,400	(370,400)
Operating Segments | Global Markets Business Group | Other than BK and TB
Business segment information
Net revenue:	152,300	135,000
Other
Business segment information
Net revenue:	25,000	13,400
Operating expenses	117,600	69,800
Operating profit (loss)	(92,600)	(56,400)
Fixed assets:	531,900	541,500
Increase in fixed assets	15,300	9,600
Depreciation	8,600	8,800
Other | Subsidiaries
Business segment information
Fixed assets:	1,344,500	1,422,400
Other | BK and TB
Business segment information
Net revenue:	106,300	23,500
Net interest income	86,600	57,800
Net fees	(7,200)	(30,700)
Other	26,900	(3,600)
Other | Other than BK and TB
Business segment information
Net revenue:	¥ (81,300)	¥ (10,100)

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, 2023	Sep. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit:	¥ 1,077,900	¥ 889,600
Foreign exchange losses—net	(329,089)	(126,755)
Trading account losses—net	(940,660)	(1,367,090)
Equity investment securities gains (losses)—net	19,195	(214)
Equity in earnings of equity method investees—net	214,835	186,906
Reversal of off-balance sheet credit instruments	3,646	12,112
Reversal of impairment of assets held for sale	0	134,141
Loss on valuation adjustment for loan held for sale	0	(209,107)
Income (loss) before income tax expense (benefit)	284,322	(1,291,685)
Fixed assets	1,376,900	1,303,300
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit:	1,078,000	890,000
Reversal of (provision for) credit losses	(62,000)	98,000
Foreign exchange losses—net	(385,000)	(165,000)
Trading account losses—net	(1,133,000)	(1,670,000)
Equity investment securities gains (losses)—net	624,000	(433,000)
Debt investment securities gains—net	102,000	199,000
Equity in earnings of equity method investees—net	215,000	187,000
Reversal of off-balance sheet credit instruments	4,000	12,000
Reversal of impairment of assets held for sale	0	134,000
Loss on valuation adjustment for loan held for sale	0	(209,000)
Other—net	(159,000)	(335,000)
Income (loss) before income tax expense (benefit)	284,000	(1,292,000)
Fixed assets	2,477,000	2,391,000
U.S. GAAP adjustments and other	1,100,000	1,088,000
Segment Reconciling Items | Japanese Gaap
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Fixed assets	¥ 1,377,000	¥ 1,303,000

Fair Value (Assets and Liabilit

Fair Value (Assets and Liabilities Measured at Fair Value by Level on Recurring Basis) (Detail) - JPY (¥)	Sep. 30, 2023	Mar. 31, 2023
Assets
Trading derivative assets	¥ 18,554,000,000,000	¥ 12,911,000,000,000
Available-for-sale debt securities	32,372,779,000,000	35,740,802,000,000
Equity securities	5,659,975,000,000	5,001,048,000,000
Liabilities
Trading derivative liabilities	20,105,000,000,000	13,833,000,000,000
Japanese national government and Japanese government agency bonds
Assets
Available-for-sale debt securities	23,806,480,000,000	26,046,603,000,000
Japanese prefectural and municipal bonds
Assets
Available-for-sale debt securities	1,435,996,000,000	2,759,941,000,000
Foreign government and official institution bonds
Assets
Available-for-sale debt securities	3,147,441,000,000	2,922,742,000,000
Corporate bonds
Assets
Available-for-sale debt securities	997,161,000,000	1,058,161,000,000
Residential mortgage-backed securities
Assets
Available-for-sale debt securities	1,190,322,000,000	1,110,254,000,000
Asset-backed securities
Assets
Available-for-sale debt securities	1,333,571,000,000	1,430,315,000,000
Other debt securities
Assets
Available-for-sale debt securities	461,808,000,000	412,786,000,000
Fair Value, Measurements, Recurring
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	32,342,285,000,000	33,026,942,000,000
Trading derivative assets	18,545,290,000,000	12,901,727,000,000
Trading loans	22,996,000,000	13,820,000,000
Available-for-sale debt securities	32,372,779,000,000	35,740,802,000,000
Equity securities	5,098,438,000,000	4,538,354,000,000
Other financial assets	1,936,986,000,000	2,476,293,000,000
Total	90,318,774,000,000	88,697,938,000,000
Liabilities
Trading securities sold, not yet purchased	87,883,000,000	234,907,000,000
Trading derivative liabilities	20,227,281,000,000	13,943,368,000,000
Obligation to return securities received as collateral	6,895,127,000,000	6,891,545,000,000
Other	297,467,000,000	387,145,000,000
Total	27,507,758,000,000	21,456,965,000,000
Fair Value, Measurements, Recurring | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	15,816,502,000,000	19,098,208,000,000
Trading derivative assets	143,551,000,000	84,406,000,000
Trading loans	0	0
Available-for-sale debt securities	23,749,188,000,000	25,236,359,000,000
Equity securities	4,934,283,000,000	4,362,017,000,000
Other financial assets	854,305,000,000	1,535,446,000,000
Total	45,497,829,000,000	50,316,436,000,000
Liabilities
Trading securities sold, not yet purchased	81,006,000,000	232,287,000,000
Trading derivative liabilities	106,471,000,000	163,129,000,000
Obligation to return securities received as collateral	6,602,613,000,000	6,664,578,000,000
Other	0	0
Total	6,790,090,000,000	7,059,994,000,000
Fair Value, Measurements, Recurring | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	14,709,285,000,000	12,746,415,000,000
Trading derivative assets	18,330,520,000,000	12,674,978,000,000
Trading loans	22,996,000,000	13,820,000,000
Available-for-sale debt securities	8,281,883,000,000	10,250,511,000,000
Equity securities	81,667,000,000	101,576,000,000
Other financial assets	962,406,000,000	848,596,000,000
Total	42,388,757,000,000	36,635,896,000,000
Liabilities
Trading securities sold, not yet purchased	6,877,000,000	2,620,000,000
Trading derivative liabilities	20,064,626,000,000	13,718,992,000,000
Obligation to return securities received as collateral	219,257,000,000	158,763,000,000
Other	268,535,000,000	313,482,000,000
Total	20,559,295,000,000	14,193,857,000,000
Fair Value, Measurements, Recurring | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	1,816,498,000,000	1,182,319,000,000
Trading derivative assets	71,219,000,000	142,343,000,000
Trading loans	0	0
Available-for-sale debt securities	341,708,000,000	253,932,000,000
Equity securities	82,488,000,000	74,761,000,000
Other financial assets	120,275,000,000	92,251,000,000
Total	2,432,188,000,000	1,745,606,000,000
Liabilities
Trading securities sold, not yet purchased	0	0
Trading derivative liabilities	56,184,000,000	61,247,000,000
Obligation to return securities received as collateral	73,257,000,000	68,204,000,000
Other	28,932,000,000	73,663,000,000
Total	158,373,000,000	203,114,000,000
Fair Value, Measurements, Recurring | Japanese national government and Japanese government agency bonds
Assets
Available-for-sale debt securities	23,806,480,000,000	26,046,603,000,000
Fair Value, Measurements, Recurring | Japanese national government and Japanese government agency bonds | Level 1
Assets
Available-for-sale debt securities	21,647,505,000,000	23,292,055,000,000
Fair Value, Measurements, Recurring | Japanese national government and Japanese government agency bonds | Level 2
Assets
Available-for-sale debt securities	2,158,975,000,000	2,754,548,000,000
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	1,435,996,000,000	2,759,941,000,000
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	1,435,996,000,000	2,759,941,000,000
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	3,147,441,000,000	2,922,742,000,000
Fair Value, Measurements, Recurring | Foreign government and official institution bonds | Level 1
Assets
Available-for-sale debt securities	2,101,683,000,000	1,944,304,000,000
Fair Value, Measurements, Recurring | Foreign government and official institution bonds | Level 2
Assets
Available-for-sale debt securities	1,045,758,000,000	978,438,000,000
Fair Value, Measurements, Recurring | Foreign government and official institution bonds | Level 3
Assets
Available-for-sale debt securities	0	0
Fair Value, Measurements, Recurring | Corporate bonds
Assets
Available-for-sale debt securities	997,161,000,000	1,058,161,000,000
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	994,968,000,000	1,056,191,000,000
Fair Value, Measurements, Recurring | Corporate bonds | Level 3
Assets
Available-for-sale debt securities	2,193,000,000	1,970,000,000
Fair Value, Measurements, Recurring | Residential mortgage-backed securities
Assets
Available-for-sale debt securities	1,190,322,000,000	1,110,254,000,000
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	1,190,307,000,000	1,110,239,000,000
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 | Asset-backed securities
Assets
Available-for-sale debt securities	1,333,571,000,000	1,430,315,000,000
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	1,060,851,000,000	1,247,377,000,000
Fair Value, Measurements, Recurring | Asset-backed securities | Level 3
Assets
Available-for-sale debt securities	272,720,000,000	182,938,000,000
Fair Value, Measurements, Recurring | Other debt securities
Assets
Available-for-sale debt securities	461,808,000,000	412,786,000,000
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	395,028,000,000	343,777,000,000
Fair Value, Measurements, Recurring | Other debt securities | Level 3
Assets
Available-for-sale debt securities	66,780,000,000	69,009,000,000
Fair Value, Measurements, Recurring | Marketable equity securities
Assets
Equity securities	5,015,851,000,000	4,463,593,000,000
Fair Value, Measurements, Recurring | Marketable equity securities | Level 1
Assets
Equity securities	4,934,283,000,000	4,362,017,000,000
Fair Value, Measurements, Recurring | Marketable equity securities | Level 2
Assets
Equity securities	81,568,000,000	101,576,000,000
Fair Value, Measurements, Recurring | Marketable equity securities | Level 3
Assets
Equity securities	0	0
Fair Value, Measurements, Recurring | Nonmarketable equity securities
Assets
Equity securities	82,587,000,000	74,761,000,000
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	99,000,000	0
Fair Value, Measurements, Recurring | Nonmarketable equity securities | Level 3
Assets
Equity securities	82,488,000,000	74,761,000,000
Fair Value, Measurements, Recurring | Interest rate contracts
Assets
Trading derivative assets	11,150,582,000,000	7,445,535,000,000
Liabilities
Trading derivative liabilities	12,808,902,000,000	8,696,888,000,000
Fair Value, Measurements, Recurring | Interest rate contracts | Level 1
Assets
Trading derivative assets	55,656,000,000	40,013,000,000
Liabilities
Trading derivative liabilities	28,508,000,000	85,641,000,000
Fair Value, Measurements, Recurring | Interest rate contracts | Level 2
Assets
Trading derivative assets	11,071,557,000,000	7,311,689,000,000
Liabilities
Trading derivative liabilities	12,746,145,000,000	8,566,043,000,000
Fair Value, Measurements, Recurring | Interest rate contracts | Level 3
Assets
Trading derivative assets	23,369,000,000	93,833,000,000
Liabilities
Trading derivative liabilities	34,249,000,000	45,204,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts
Assets
Trading derivative assets	7,175,696,000,000	5,276,134,000,000
Liabilities
Trading derivative liabilities	7,202,486,000,000	5,017,957,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts | Level 1
Assets
Trading derivative assets	4,661,000,000	3,909,000,000
Liabilities
Trading derivative liabilities	4,886,000,000	1,679,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts | Level 2
Assets
Trading derivative assets	7,159,046,000,000	5,258,511,000,000
Liabilities
Trading derivative liabilities	7,195,310,000,000	5,013,909,000,000
Fair Value, Measurements, Recurring | Foreign exchange contracts | Level 3
Assets
Trading derivative assets	11,989,000,000	13,714,000,000
Liabilities
Trading derivative liabilities	2,290,000,000	2,369,000,000
Fair Value, Measurements, Recurring | Equity contracts
Assets
Trading derivative assets	149,637,000,000	89,760,000,000
Liabilities
Trading derivative liabilities	125,461,000,000	128,493,000,000
Fair Value, Measurements, Recurring | Equity contracts | Level 1
Assets
Trading derivative assets	83,234,000,000	40,484,000,000
Liabilities
Trading derivative liabilities	73,077,000,000	75,809,000,000
Fair Value, Measurements, Recurring | Equity contracts | Level 2
Assets
Trading derivative assets	50,814,000,000	28,617,000,000
Liabilities
Trading derivative liabilities	51,854,000,000	48,953,000,000
Fair Value, Measurements, Recurring | Equity contracts | Level 3
Assets
Trading derivative assets	15,589,000,000	20,659,000,000
Liabilities
Trading derivative liabilities	530,000,000	3,731,000,000
Fair Value, Measurements, Recurring | Commodity contracts
Assets
Trading derivative assets	19,024,000,000	9,925,000,000
Liabilities
Trading derivative liabilities	18,592,000,000	9,817,000,000
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	476,000,000	17,000,000
Liabilities
Trading derivative liabilities	0	0
Fair Value, Measurements, Recurring | Commodity contracts | Level 3
Assets
Trading derivative assets	18,548,000,000	9,908,000,000
Liabilities
Trading derivative liabilities	18,592,000,000	9,817,000,000
Fair Value, Measurements, Recurring | Credit derivatives
Assets
Trading derivative assets	50,059,000,000	79,945,000,000
Liabilities
Trading derivative liabilities	71,559,000,000	90,149,000,000
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	48,610,000,000	76,144,000,000
Liabilities
Trading derivative liabilities	71,307,000,000	90,087,000,000
Fair Value, Measurements, Recurring | Credit derivatives | Level 3
Assets
Trading derivative assets	1,449,000,000	3,801,000,000
Liabilities
Trading derivative liabilities	252,000,000	62,000,000
Fair Value, Measurements, Recurring | Other
Assets
Trading derivative assets	292,000,000	428,000,000
Liabilities
Trading derivative liabilities	281,000,000	64,000,000
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	17,000,000	0
Liabilities
Trading derivative liabilities	10,000,000	0
Fair Value, Measurements, Recurring | Other | Level 3
Assets
Trading derivative assets	275,000,000	428,000,000
Liabilities
Trading derivative liabilities	271,000,000	64,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	6,988,597,000,000	6,422,025,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	6,491,075,000,000	6,092,523,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	497,522,000,000	329,502,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese national government and Japanese government agency bonds | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	211,107,000,000	279,168,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	211,107,000,000	279,168,000,000
Fair Value, Measurements, Recurring | Debt securities | Japanese prefectural and municipal bonds | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	8,546,594,000,000	12,255,133,000,000
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	7,754,392,000,000	11,760,274,000,000
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	792,052,000,000	493,691,000,000
Fair Value, Measurements, Recurring | Debt securities | Foreign government and official institution bonds | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	150,000,000	1,168,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	2,660,321,000,000	2,256,389,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	3,965,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	2,660,321,000,000	2,252,424,000,000
Fair Value, Measurements, Recurring | Debt securities | Corporate bonds | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	5,585,266,000,000	4,978,709,000,000
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	5,585,266,000,000	4,978,709,000,000
Fair Value, Measurements, Recurring | Debt securities | Residential mortgage-backed securities | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Commercial mortgage-backed securities
Assets
Debt Securities, Trading, and Equity Securities, FV-NI		4,627,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial mortgage-backed securities | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI		0
Fair Value, Measurements, Recurring | Debt securities | Commercial mortgage-backed securities | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI		4,627,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial mortgage-backed securities | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI		0
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	2,365,240,000,000	1,879,292,000,000
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	1,246,481,000,000	1,210,381,000,000
Fair Value, Measurements, Recurring | Debt securities | Asset-backed securities | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	1,118,759,000,000	668,911,000,000
Fair Value, Measurements, Recurring | Debt securities | Other debt securities
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	519,484,000,000	334,124,000,000
Fair Value, Measurements, Recurring | Debt securities | Other debt securities | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Other debt securities | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	2,135,000,000	0
Fair Value, Measurements, Recurring | Debt securities | Other debt securities | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	517,349,000,000	334,124,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial paper
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	2,428,377,000,000	1,931,569,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial paper | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Debt securities | Commercial paper | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	2,428,377,000,000	1,931,569,000,000
Fair Value, Measurements, Recurring | Debt securities | Commercial paper | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	0	0
Fair Value, Measurements, Recurring | Equity securities
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	3,037,299,000,000	2,685,906,000,000
Liabilities
Investment securities valued at net asset value	267,084,000,000	225,972,000,000
Unfunded commitments	230,396,000,000	172,562,000,000
Fair Value, Measurements, Recurring | Equity securities | Level 1
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	1,571,035,000,000	1,241,446,000,000
Fair Value, Measurements, Recurring | Equity securities | Level 2
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	1,286,024,000,000	1,266,344,000,000
Fair Value, Measurements, Recurring | Equity securities | Level 3
Assets
Debt Securities, Trading, and Equity Securities, FV-NI	180,240,000,000	178,116,000,000
Fair Value, Measurements, Recurring | Real Estate Funds | Nonmarketable equity securities
Liabilities
Investment securities valued at net asset value	32,322,000,000	29,308,000,000
Unfunded commitments	1,018,000,000	1,305,000,000
Fair Value, Measurements, Recurring | Private equity and other funds | Nonmarketable equity securities
Liabilities
Investment securities valued at net asset value	57,383,000,000	51,458,000,000
Unfunded commitments	¥ 250,000,000	¥ 0

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, 2023	Sep. 30, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	¥ 1,684,359	¥ 1,219,735
Total gains (losses) for the period included in earnings, Assets	142,283	106,083
Total gains (losses) for the period included in other comprehensive income, Assets	22,966	45,565
Purchases, Assets	734,536	604,609
Issues, Assets	(355)	(334)
Sales, Assets	(2,100)	(23,902)
Settlements, Assets	(160,381)	(181,103)
Transfers into Level 3, Assets	10,442	26,976
Transfers out of Level 3, Assets	(55,746)	(26,116)
Level 3 assets, Ending balance	2,376,004	1,771,513
Change in unrealized gains (losses) for assets still held at period end	154,646	141,791
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 liabilities, Beginning balance	141,867	16,463
Total gains (losses) for the period included in earnings, Liabilities	(24,475)	54,070
Total gains (losses) for the period included in other comprehensive income, Liabilities	(5,791)	(10,269)
Purchases, Liabilities	0	0
Issues, Liabilities	28,133	128,122
Sales, Liabilities	0	0
Settlements, Liabilities	(54,619)	(19,043)
Transfers into Level 3, Liabilities	5,147	116,892
Transfers out of Level 3, Liabilities	(48,605)	(3,554)
Level 3 liabilities, Ending balance	102,189	195,079
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	(6,980)	58,483
Discontinued operations, held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance		76,918
Total gains (losses) for the period included in earnings, Assets		3,928
Total gains (losses) for the period included in other comprehensive income, Assets		13,071
Purchases, Assets		1,120
Issues, Assets		0
Sales, Assets		(1,158)
Settlements, Assets		(9,254)
Transfers into Level 3, Assets		0
Transfers out of Level 3, Assets		0
Level 3 assets, Ending balance		84,625
Change in unrealized gains (losses) for assets still held at period end		15,113
Obligation to return securities received as collateral
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 liabilities, Beginning balance	68,204	0
Total gains (losses) for the period included in earnings, Liabilities	0	0
Total gains (losses) for the period included in other comprehensive income, Liabilities	0	0
Purchases, Liabilities	0	0
Issues, Liabilities	5,053	73,595
Sales, Liabilities	0	0
Settlements, Liabilities	0	0
Transfers into Level 3, Liabilities	0	0
Transfers out of Level 3, Liabilities	0	0
Level 3 liabilities, Ending balance	73,257	73,595
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	0	0
Other
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 liabilities, Beginning balance	73,663	16,463
Total gains (losses) for the period included in earnings, Liabilities	(24,475)	54,070
Total gains (losses) for the period included in other comprehensive income, Liabilities	(5,791)	(10,269)
Purchases, Liabilities	0	0
Issues, Liabilities	23,080	54,527
Sales, Liabilities	0	0
Settlements, Liabilities	(54,619)	(19,043)
Transfers into Level 3, Liabilities	5,147	116,892
Transfers out of Level 3, Liabilities	(48,605)	(3,554)
Level 3 liabilities, Ending balance	28,932	121,484
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	(6,980)	58,483
Trading securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	1,182,319	797,997
Total gains (losses) for the period included in earnings, Assets	149,674	125,172
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	494,881	333,302
Issues, Assets	0	0
Sales, Assets	(626)	(21,408)
Settlements, Assets	(9,895)	(9,255)
Transfers into Level 3, Assets	145	0
Transfers out of Level 3, Assets	0	(877)
Level 3 assets, Ending balance	1,816,498	1,224,931
Change in unrealized gains (losses) for assets still held at period end	148,307	121,950
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	1,168	1,711
Total gains (losses) for the period included in earnings, Assets	122	57
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	7	5,712
Issues, Assets	0	0
Sales, Assets	(7)	(5,765)
Settlements, Assets	(1,140)	(250)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	(194)
Level 3 assets, Ending balance	150	1,271
Change in unrealized gains (losses) for assets still held at period end	(1)	5
Trading account, debt securities | Corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance		683
Total gains (losses) for the period included in earnings, Assets		0
Total gains (losses) for the period included in other comprehensive income, Assets		0
Purchases, Assets		0
Issues, Assets		0
Sales, Assets		0
Settlements, Assets		0
Transfers into Level 3, Assets		0
Transfers out of Level 3, Assets		(683)
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	668,911	315,231
Total gains (losses) for the period included in earnings, Assets	108,122	72,667
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	345,917	324,375
Issues, Assets	0	0
Sales, Assets	0	(15,636)
Settlements, Assets	(4,191)	(259)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	1,118,759	696,378
Change in unrealized gains (losses) for assets still held at period end	107,898	71,580
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	334,124	313,166
Total gains (losses) for the period included in earnings, Assets	42,225	44,986
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	141,000	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	517,349	358,152
Change in unrealized gains (losses) for assets still held at period end	42,225	44,986
Trading account, equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	178,116	167,206
Total gains (losses) for the period included in earnings, Assets	(795)	7,462
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	7,957	3,215
Issues, Assets	0	0
Sales, Assets	(619)	(7)
Settlements, Assets	(4,564)	(8,746)
Transfers into Level 3, Assets	145	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	180,240	169,130
Change in unrealized gains (losses) for assets still held at period end	(1,815)	5,379
Trading derivatives—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	81,096	71,089
Total gains (losses) for the period included in earnings, Assets	(12,416)	(24,159)
Total gains (losses) for the period included in other comprehensive income, Assets	1,836	1,775
Purchases, Assets	4	612
Issues, Assets	(355)	(334)
Sales, Assets	0	0
Settlements, Assets	(10,117)	(19,889)
Transfers into Level 3, Assets	10,271	20,791
Transfers out of Level 3, Assets	(55,284)	(25,003)
Level 3 assets, Ending balance	15,035	24,882
Change in unrealized gains (losses) for assets still held at period end	(14,426)	(21,160)
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	48,629	37,493
Total gains (losses) for the period included in earnings, Assets	(16,890)	(39,744)
Total gains (losses) for the period included in other comprehensive income, Assets	(1,036)	30
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	1,267	(1,901)
Transfers into Level 3, Assets	10,595	20,612
Transfers out of Level 3, Assets	(53,445)	(25,017)
Level 3 assets, Ending balance	(10,880)	(8,527)
Change in unrealized gains (losses) for assets still held at period end	(18,757)	(33,999)
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	11,345	7,463
Total gains (losses) for the period included in earnings, Assets	(2,797)	3,509
Total gains (losses) for the period included in other comprehensive income, Assets	999	392
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	417	(4,200)
Transfers into Level 3, Assets	(324)	179
Transfers out of Level 3, Assets	59	56
Level 3 assets, Ending balance	9,699	7,399
Change in unrealized gains (losses) for assets still held at period end	(2,220)	1,705
Trading derivatives—net | Equity contracts—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	16,928	23,420
Total gains (losses) for the period included in earnings, Assets	8,065	10,723
Total gains (losses) for the period included in other comprehensive income, Assets	1,874	1,355
Purchases, Assets	4	19
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(11,696)	(13,639)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	(116)	(42)
Level 3 assets, Ending balance	15,059	21,836
Change in unrealized gains (losses) for assets still held at period end	7,327	9,785
Trading derivatives—net | Commodity contracts—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	91	(45)
Total gains (losses) for the period included in earnings, Assets	(128)	26
Total gains (losses) for the period included in other comprehensive income, Assets	(1)	(2)
Purchases, Assets	0	0
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(6)	(5)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	(44)	(26)
Change in unrealized gains (losses) for assets still held at period end	(128)	27
Trading derivatives—net | Credit derivatives—net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	3,739	2,729
Total gains (losses) for the period included in earnings, Assets	(661)	1,236
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	(99)	(144)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	(1,782)	0
Level 3 assets, Ending balance	1,197	3,821
Change in unrealized gains (losses) for assets still held at period end	(648)	1,232
Trading derivatives—net | Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	364	29
Total gains (losses) for the period included in earnings, Assets	(5)	91
Total gains (losses) for the period included in other comprehensive income, Assets	0	0
Purchases, Assets	0	593
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	0
Level 3 assets, Ending balance	4	379
Change in unrealized gains (losses) for assets still held at period end	0	90
Available-for-sale debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	253,932	212,936
Total gains (losses) for the period included in earnings, Assets	1,677	(1,096)
Total gains (losses) for the period included in other comprehensive income, Assets	20,568	30,227
Purchases, Assets	205,826	170,610
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(140,321)	(141,788)
Transfers into Level 3, Assets	26	1,405
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	341,708	272,294
Change in unrealized gains (losses) for assets still held at period end	18,299	23,794
Available-for-sale debt securities | Discontinued operations, held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance		65,262
Total gains (losses) for the period included in earnings, Assets		(1,261)
Total gains (losses) for the period included in other comprehensive income, Assets		10,114
Purchases, Assets		93
Issues, Assets		0
Sales, Assets		(1,158)
Settlements, Assets		(9,254)
Transfers into Level 3, Assets		0
Transfers out of Level 3, Assets		0
Level 3 assets, Ending balance		63,796
Change in unrealized gains (losses) for assets still held at period end		7,456
Available-for-sale 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		11,890
Total gains (losses) for the period included in earnings, Assets		0
Total gains (losses) for the period included in other comprehensive income, Assets		(925)
Purchases, Assets		128
Issues, Assets		0
Sales, Assets		0
Settlements, Assets		(11,093)
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
Available-for-sale debt securities | Corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	1,970	3,089
Total gains (losses) for the period included in earnings, Assets	(2)	(42)
Total gains (losses) for the period included in other comprehensive income, Assets	203	210
Purchases, Assets	0	1,824
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(4)	(57)
Transfers into Level 3, Assets	26	1,255
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	2,193	6,279
Change in unrealized gains (losses) for assets still held at period end	201	165
Available-for-sale debt 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 debt securities | Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	182,938	124,379
Total gains (losses) for the period included in earnings, Assets	1,597	(1,125)
Total gains (losses) for the period included in other comprehensive income, Assets	15,841	21,490
Purchases, Assets	205,611	168,312
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(133,267)	(130,638)
Transfers into Level 3, Assets	0	0
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	272,720	182,418
Change in unrealized gains (losses) for assets still held at period end	13,492	14,106
Available-for-sale debt securities | Other debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	69,009	73,563
Total gains (losses) for the period included in earnings, Assets	82	71
Total gains (losses) for the period included in other comprehensive income, Assets	4,524	9,452
Purchases, Assets	215	346
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(7,050)	0
Transfers into Level 3, Assets	0	150
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	66,780	83,582
Change in unrealized gains (losses) for assets still held at period end	4,606	9,523
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	74,761	55,883
Total gains (losses) for the period included in earnings, Assets	3,385	1,881
Total gains (losses) for the period included in other comprehensive income, Assets	408	495
Purchases, Assets	5,870	9,884
Issues, Assets	0	0
Sales, Assets	(1,474)	(1,336)
Settlements, Assets	0	(806)
Transfers into Level 3, Assets	0	2,855
Transfers out of Level 3, Assets	(462)	(236)
Level 3 assets, Ending balance	82,488	68,620
Change in unrealized gains (losses) for assets still held at period end	2,503	1,737
Equity securities | Nonmarketable equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	74,761	55,883
Total gains (losses) for the period included in earnings, Assets	3,385	1,881
Total gains (losses) for the period included in other comprehensive income, Assets	408	495
Purchases, Assets	5,870	9,884
Issues, Assets	0	0
Sales, Assets	(1,474)	(1,336)
Settlements, Assets	0	(806)
Transfers into Level 3, Assets	0	2,855
Transfers out of Level 3, Assets	(462)	(236)
Level 3 assets, Ending balance	82,488	68,620
Change in unrealized gains (losses) for assets still held at period end	2,503	1,737
Other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance	92,251	4,912
Total gains (losses) for the period included in earnings, Assets	(37)	357
Total gains (losses) for the period included in other comprehensive income, Assets	154	(3)
Purchases, Assets	27,955	89,081
Issues, Assets	0	0
Sales, Assets	0	0
Settlements, Assets	(48)	(111)
Transfers into Level 3, Assets	0	1,925
Transfers out of Level 3, Assets	0	0
Level 3 assets, Ending balance	120,275	96,161
Change in unrealized gains (losses) for assets still held at period end	¥ (37)	357
Other | Discontinued operations, held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 assets, Beginning balance		11,656
Total gains (losses) for the period included in earnings, Assets		5,189
Total gains (losses) for the period included in other comprehensive income, Assets		2,957
Purchases, Assets		1,027
Issues, Assets		0
Sales, Assets		0
Settlements, Assets		0
Transfers into Level 3, Assets		0
Transfers out of Level 3, Assets		0
Level 3 assets, Ending balance		20,829
Change in unrealized gains (losses) for assets still held at period end		¥ 7,657

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, 2023 JPY (¥) Year	Mar. 31, 2023 JPY (¥) Year
Interest rate contracts—net | Option model
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	¥ (10,880)	¥ 48,209
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	0.603	0.606
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	0.436	0.444
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	0.013	0.020
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	0.362	0.366
Interest rate contracts—net | Option model | Volatility | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.499	0.703
Interest rate contracts—net | Option model | Volatility | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.722	1.067
Interest rate contracts—net | Option model | Volatility | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.692	0.801
Foreign exchange contracts—net | Option model
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	¥ 9,699	¥ 11,345
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	0.300
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	0.510	0.506
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	0.200	0.143
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	0.370	0.368
Foreign exchange contracts—net | Option model | Volatility | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.106	0.106
Foreign exchange contracts—net | Option model | Volatility | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.219	0.230
Foreign exchange contracts—net | Option model | Volatility | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.145	0.156
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	¥ 7,470	¥ 13,612
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 | Year	0.3	0.1
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 | Year	0.8	1
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 | Year	0.5	0.5
Equity contracts—net | Option model
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	¥ 7,589	¥ 3,316
Equity contracts—net | Option model | Volatility | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.285	0.280
Equity contracts—net | Option model | Volatility | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.370	0.370
Equity contracts—net | Option model | Volatility | Median
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs	0.336	0.322
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	0.300	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	0.100	0.150
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	0.058	0.056
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	0.531	0.541
Residential 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	¥ 111,944	¥ 101,014
Residential 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		1
Residential 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		1
Residential 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 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
Residential 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	¥ 1,031,791	¥ 591,515
Residential 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 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	0.990	0.990
Residential 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 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	0.577	0.722
Residential 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	0.577	0.722
Residential 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 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 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	0.018	0.020
Residential 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	0.020	0.023
Residential 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	0.018	0.020
Residential 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	0.139	0.131
Residential 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	0.139	0.131
Other debt securities | Discounted cash flow
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	¥ 565,788	¥ 385,046
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	0.009	0.009
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	0.028	0.028

Fair Value (Carrying Value of A

Fair Value (Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level) (Detail) - Fair Value, Measurements, Nonrecurring - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	¥ 54,442	¥ 26,637
Loans Receivable, Fair Value Disclosure	752,310	616,360
Loans held for sale	584,558	439,361
Collateral dependent loans	167,752	176,999
Premises and equipment	3,866	11,835
Intangible assets	5,063	309
Goodwill	0	184,364
Other assets	62,774	207,595
Investments in equity method investees	34,962	191,064
Other	27,812	16,531
Total	878,455	1,047,100
Investment securities valued at net asset value	11,184	33,595
Unfunded commitments related to investment securities valued at net asset value	18,170	23,029
Level 1
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	0	0
Loans Receivable, Fair Value Disclosure	2,389	1,917
Loans held for sale	0	0
Collateral dependent loans	2,389	1,917
Premises and equipment	0	0
Intangible assets	0	0
Goodwill	0	0
Other assets	0	178,592
Investments in equity method investees	0	178,592
Other	0	0
Total	2,389	180,509
Level 2
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	9,560	13,366
Loans Receivable, Fair Value Disclosure	4,222	3,388
Loans held for sale	0	0
Collateral dependent loans	4,222	3,388
Premises and equipment	0	0
Intangible assets	0	0
Goodwill	0	0
Other assets	38,152	0
Investments in equity method investees	33,222	0
Other	4,930	0
Total	51,934	16,754
Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	44,882	13,271
Loans Receivable, Fair Value Disclosure	745,699	611,055
Loans held for sale	584,558	439,361
Collateral dependent loans	161,141	171,694
Premises and equipment	3,866	11,835
Intangible assets	5,063	309
Goodwill	0	184,364
Other assets	24,622	29,003
Investments in equity method investees	1,740	12,472
Other	22,882	16,531
Total	¥ 824,132	¥ 849,837

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			12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2022	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	¥ 89,101	¥ 263,735
Loss on valuation adjustment for loans held for sale held by MUFG Union Bank	0	209,107
Reversal of impairment of assets held for sale	0	134,141
Disposal group, disposed of by sale, not discontinued operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	0	209,107
Disposal group, disposed of by sale, not discontinued operations | MUFG Union Bank
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loans held for sale held by MUFG Union Bank			¥ 134,141	¥ 134,141
Reversal of impairment of assets held for sale		134,141
Investment securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	8,971	505
Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	44,746	(66)
Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	11,096	451
Loans | Loans held for sale | Disposal group, disposed of by sale, not discontinued operations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	0	209,107
Loans | Collateral dependent loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	33,650	(517)
Premises and equipment
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	1,142	2,579
Intangible assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	11,433	849
Other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	22,809	50,761
Other assets | Investments in equity method investees
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	12,687	46,928
Other assets | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loss on valuation adjustment for loan held for sale	¥ 10,122	¥ 3,833

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, 2023	Sep. 30, 2022
Financial liabilities:
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	¥ (3,025)	¥ 54,149
Financial liabilities: | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	(3,025)	54,149
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	2,592	(3,295)
Financial liabilities: | Other short-term borrowings | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	2,592	(3,295)
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	(5,617)	57,444
Financial liabilities: | Long-term debt | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	(5,617)	57,444
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	1,165,907	905,675
Financial assets: | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	(596,477)	(1,434,189)
Financial assets: | Foreign exchange gains (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	1,762,384	2,339,864
Financial assets: | Trading account securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	1,165,907	905,675
Financial assets: | Trading account securities | Trading account profits (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	(596,477)	(1,434,189)
Financial assets: | Trading account securities | Foreign exchange gains (losses)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	¥ 1,762,384	¥ 2,339,864

Fair Value (Differences between

Fair Value (Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	¥ 363,840	¥ 501,982
Fair value	339,840	431,338
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	(24,000)	(70,644)
Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	363,840	501,982
Fair value	339,840	431,338
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	¥ (24,000)	¥ (70,644)

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, 2023	Mar. 31, 2023
Carrying amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	¥ 59,954	¥ 60,051
Interest-earning deposits in other banks	48,957	53,990
Call loans and funds sold	2,970	1,802
Receivables under resale agreements	16,370	14,059
Receivables under securities borrowing transactions	5,085	4,556
Investment securities	24,657	21,520
Loans, net of allowance for credit losses	123,110	118,679
Other financial assets	11,564	10,108
Non-interest-bearing	38,084	37,804
Interest-bearing	205,757	197,500
Total deposits	243,841	235,304
Call money and funds purchased	3,854	3,438
Payables under repurchase agreements	32,960	40,132
Payables under securities lending transactions	1,017	1,138
Due to trust account and other short-term borrowings	14,412	14,260
Long-term debt	40,186	38,704
Other financial liabilities	9,875	9,595
Carrying amounts of investments in equity method investees	3,950	3,482
Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	59,954	60,051
Interest-earning deposits in other banks	48,957	53,990
Call loans and funds sold	2,970	1,802
Receivables under resale agreements	16,370	14,059
Receivables under securities borrowing transactions	5,085	4,556
Investment securities	24,158	21,386
Loans, net of allowance for credit losses	123,162	118,933
Other financial assets	11,564	10,108
Non-interest-bearing	38,084	37,804
Interest-bearing	205,841	197,573
Total deposits	243,925	235,377
Call money and funds purchased	3,854	3,438
Payables under repurchase agreements	32,960	40,132
Payables under securities lending transactions	1,017	1,138
Due to trust account and other short-term borrowings	14,412	14,260
Long-term debt	39,045	37,928
Other financial liabilities	9,875	9,595
Estimated fair value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	59,954	60,051
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	14,654	13,527
Loans, net of allowance for credit losses	2	2
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	48,957	53,990
Call loans and funds sold	2,970	1,802
Receivables under resale agreements	16,370	14,059
Receivables under securities borrowing transactions	5,085	4,556
Investment securities	6,761	5,354
Loans, net of allowance for credit losses	288	263
Other financial assets	11,564	10,108
Non-interest-bearing	38,084	37,804
Interest-bearing	205,841	197,573
Total deposits	243,925	235,377
Call money and funds purchased	3,854	3,438
Payables under repurchase agreements	32,960	40,132
Payables under securities lending transactions	1,017	1,138
Due to trust account and other short-term borrowings	14,412	14,260
Long-term debt	39,045	37,928
Other financial liabilities	9,875	9,595
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	2,743	2,505
Loans, net of allowance for credit losses	122,872	118,668
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, 2023	Sep. 30, 2022
Equity Method Investment, Summarized Financial Information, Income and Loss
Net income applicable to Morgan Stanley	¥ 268,458	¥ (951,395)
Morgan Stanley
Equity Method Investment, Summarized Financial Information, Income and Loss
Net revenues	3,769,000	3,499,000
Total non-interest expenses	2,887,000	2,582,000
Income from continuing operations before income taxes	840,000	899,000
Net income applicable to Morgan Stanley	¥ 647,000	¥ 687,000

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Detail) - Subsequent Event - JPY (¥) ¥ / shares in Units, ¥ in Millions	Nov. 30, 2023	Nov. 14, 2023
Subsequent Event [Line Items]
Number of shares authorized to be repurchased (in shares)		400,000,000
Stock repurchase program, authorized amount		¥ 400,000
Treasury stock, shares retired (in shares)	350,000,000
Common Stock
Subsequent Event [Line Items]
Dividends payable (in Yen per share)		¥ 20.5
Dividends payable, total amount		¥ 247,101
Shares repurchased as % of total shares		3.30%