Sumitomo Mitsui Financial (SMFG) 6-K 22 Dec 23 Current report (foreign) Financial data

Cover Page

Cover Page	6 Months Ended
	Sep. 30, 2023
Cover [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
Entity Registrant Name	SUMITOMO MITSUI FINANCIAL GROUP, INC.
Entity Central Index Key	0001022837
Current Fiscal Year End Date	--03-31

Consolidated Statements of Fina

Consolidated Statements of Financial Position (Unaudited) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Assets:
Cash and deposits with banks	¥ 78,237,000	¥ 76,465,511
Call loans and bills bought	6,088,010	5,684,812
Reverse repurchase agreements and cash collateral on securities borrowed	13,402,684	11,024,084
Trading assets	5,310,998	4,585,915
Derivative financial instruments	13,015,294	8,649,947
Financial assets at fair value through profit or loss	1,900,462	1,488,239
Investment securities	34,082,730	27,595,598
Loans and advances	116,285,384	111,891,134
Investments in associates and joint ventures	1,384,292	1,141,250
Property, plant and equipment	1,877,012	1,832,241
Intangible assets	973,871	905,028
Other assets	8,929,755	6,167,202
Current tax assets	71,559	190,267
Deferred tax assets	81,596	65,810
Total assets	281,640,647	257,687,038
Liabilities:
Deposits	178,121,198	172,927,810
Call money and bills sold	2,161,558	2,569,056
Repurchase agreements and cash collateral on securities lent	23,604,811	17,786,026
Trading liabilities	4,187,152	3,291,089
Derivative financial instruments	15,298,715	10,496,855
Financial liabilities designated at fair value through profit or loss	421,392	414,106
Borrowings	16,060,190	15,371,801
Debt securities in issue	13,725,816	11,984,994
Provisions	225,396	247,344
Other liabilities	12,273,302	8,703,413
Current tax liabilities	46,800	41,649
Deferred tax liabilities	449,682	315,930
Total liabilities	266,576,012	244,150,073
Equity:
Capital stock	2,344,038	2,342,537
Capital surplus	635,915	645,774
Retained earnings	7,563,151	7,199,479
Treasury stock	(17,722)	(151,799)
Equity excluding other reserves	10,525,382	10,035,991
Other reserves	3,288,687	2,629,000
Equity attributable to shareholders of Sumitomo Mitsui Financial Group, Inc.	13,814,069	12,664,991
Non-controlling interests	123,871	106,172
Equity attributable to other equity instruments holders	1,126,695	765,802
Total equity	15,064,635	13,536,965
Total equity and liabilities	¥ 281,640,647	¥ 257,687,038

Consolidated Income Statements

Consolidated Income Statements (Unaudited) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Profit or loss [abstract]
Interest income	¥ 2,776,392	¥ 1,424,087
Interest expense	1,887,450	573,910
Net interest income	888,942	850,177
Fee and commission income	690,715	607,546
Fee and commission expense	119,089	112,737
Net fee and commission income	571,626	494,809
Net trading income	487,524	565,037
Net income from financial assets and liabilities at fair value through profit or loss	79,984	171,708
Net investment income (loss)	61,733	(4,915)
Other income	57,734	85,818
Total operating income	2,147,543	2,162,634
Impairment charges on financial assets	130,253	88,025
Net operating income	2,017,290	2,074,609
General and administrative expenses	1,072,003	948,612
Other expenses	129,601	162,686
Operating expenses	1,201,604	1,111,298
Share of post-tax profit of associates and joint ventures	55,286	61,241
Profit before tax	870,972	1,024,552
Income tax expense	208,185	247,158
Net profit	662,787	777,394
Profit attributable to:
Shareholders of Sumitomo Mitsui Financial Group, Inc.	651,127	762,185
Non-controlling interests	5,891	9,603
Other equity instruments holders	¥ 5,769	¥ 5,606
Earnings per share:
Basic	¥ 487.79	¥ 555.91
Diluted	¥ 487.65	¥ 555.72

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of comprehensive income [abstract]
Net profit	¥ 662,787	¥ 777,394
Remeasurements of defined benefit plans:
Gains (losses) arising during the period, before tax	(6,886)	15,329
Equity instruments at fair value through other comprehensive income:
Gains (losses) arising during the period, before tax	760,840	(219,566)
Own credit on financial liabilities designated at fair value through profit or loss:
Gains (losses) arising during the period, before tax	(7,589)	1,035
Share of other comprehensive income (loss) of associates and joint ventures	1,790	12,073
Income tax relating to items that will not be reclassified	(223,425)	62,244
Total items that will not be reclassified to profit or loss, net of tax	524,730	(128,885)
Debt instruments at fair value through other comprehensive income:
Gains (losses) arising during the period, before tax	(484,785)	(652,810)
Reclassification adjustments for (gains) losses included in net profit, before tax	45,420	157,216
Exchange differences on translating foreign operations:
Gains (losses) arising during the period, before tax	487,098	655,317
Reclassification adjustments for (gains) losses included in net profit, before tax		193
Share of other comprehensive income (loss) of associates and joint ventures	33,910	38,125
Income tax relating to items that may be reclassified	132,461	147,427
Total items that may be reclassified subsequently to profit or loss, net of tax	214,104	345,468
Other comprehensive income, net of tax	738,834	216,583
Total comprehensive income	1,401,621	993,977
Total comprehensive income attributable to:
Shareholders of Sumitomo Mitsui Financial Group, Inc.	1,386,696	976,191
Non-controlling interests	9,156	12,180
Other equity instruments holders	¥ 5,769	¥ 5,606

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity (Unaudited) - JPY (¥) ¥ in Millions	Total	Capital stock [member]	Capital surplus [member]	Retained earnings [member]	Treasury stock [member]	Remeasurements of defined benefit plans [member]	Financial instruments measured at fair value through other comprehensive income ("FVOCI") [member]	Own credit on financial liabilities designated at fair value through profit or loss reserve [member]	Exchange differences on translating foreign operations [member]	Equity attributable to SMFG's shareholders [member]	Non-controlling interests [member]	Equity attributable to other equity instruments holders [member]
At beginning of period at Mar. 31, 2022	¥ 12,781,692	¥ 2,341,878	¥ 645,382	¥ 6,434,605	¥ (13,403)	¥ 197,310	¥ 1,808,222	¥ 520	¥ 540,242	¥ 11,954,756	¥ 93,325	¥ 733,611
Comprehensive income:
Net profit	777,394			762,185						762,185	9,603	5,606
Other comprehensive income	216,583					10,641	(499,964)	718	702,611	214,006	2,577
Total comprehensive income	993,977			762,185		10,641	(499,964)	718	702,611	976,191	12,180	5,606
Issuance of shares under share-based payment transactions	1,318	659	659							1,318
Transaction with non-controlling interest shareholders	899		(395)							(395)	1,294
Dividends to shareholders	(146,649)			(143,936)						(143,936)	(2,713)
Coupons on other equity instruments	(5,606)											(5,606)
Purchases of other equity instruments and sales of other equity instruments-net	1,002											1,002
Purchases of treasury stock	(34)				(34)					(34)
Sales of treasury stock	320				320					320
Loss on sales of treasury stock	(46)			(46)						(46)
Share-based payment transactions	(62)		(62)							(62)
Transfer from other reserves to retained earnings				90,970		(21,303)	(69,667)
Others	2,723										2,723
At end of period at Sep. 30, 2022	13,629,534	2,342,537	645,584	7,143,778	(13,117)	186,648	1,238,591	1,238	1,242,853	12,788,112	106,809	734,613
At beginning of period at Mar. 31, 2023	13,536,965	2,342,537	645,774	7,199,479	(151,799)	159,584	1,575,193	9,433	884,790	12,664,991	106,172	765,802
Comprehensive income:
Net profit	662,787			651,127						651,127	5,891	5,769
Other comprehensive income	738,834					(4,696)	232,612	(5,265)	512,918	735,569	3,265
Total comprehensive income	1,401,621			651,127		(4,696)	232,612	(5,265)	512,918	1,386,696	9,156	5,769
Issuance of shares under share-based payment transactions	3,002	1,501	1,501							3,002
Issuance of other equity instruments	360,806											360,806
Acquisition and disposal of subsidiaries and businesses-net	48										48
Transaction with non-controlling interest shareholders	(100)		(9,893)							(9,893)	9,793
Dividends to shareholders	(171,385)			(168,078)						(168,078)	(3,307)
Coupons on other equity instruments	(5,769)											(5,769)
Purchases of other equity instruments and sales of other equity instruments-net	87											87
Purchases of treasury stock	(61,326)				(61,326)					(61,326)
Sales of treasury stock	243				243					243
Loss on sales of treasury stock	(99)			(99)						(99)
Cancellation of treasury stock				(195,160)	195,160
Share-based payment transactions	(1,378)		(1,378)							(1,378)
Transfer from other reserves to retained earnings				75,882		(17,693)	(58,189)
Others	1,920		(89)							(89)	2,009
At end of period at Sep. 30, 2023	¥ 15,064,635	¥ 2,344,038	¥ 635,915	¥ 7,563,151	¥ (17,722)	¥ 137,195	¥ 1,749,616	¥ 4,168	¥ 1,397,708	¥ 13,814,069	¥ 123,871	¥ 1,126,695

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating Activities:
Profit before tax	¥ 870,972	¥ 1,024,552
Adjustments for:
Gains on financial assets at fair value through profit or loss and investment securities	(58,174)	(18,600)
Foreign exchange gains	(1,170,432)	(939,255)
Provision for loan losses	129,983	86,989
Depreciation and amortization	166,526	157,999
Share of post-tax profit of associates and joint ventures	(55,286)	(61,241)
Net changes in assets and liabilities:
Net decrease of term deposits with original maturities over three months	1,137,962	1,767,421
Net increase of call loans and bills bought	(278,393)	(4,914,016)
Net (increase) decrease of reverse repurchase agreements and cash collateral on securities borrowed	(1,922,238)	1,388,766
Net increase of loans and advances	(3,661,329)	(9,941,327)
Net change of trading assets and liabilities, derivative financial instruments, and financial liabilities designated at fair value through profit or loss	463,896	1,232,767
Net increase of deposits	4,097,851	8,666,708
Net increase (decrease) of call money and bills sold	(426,526)	4,375
Net increase (decrease) of repurchase agreements and cash collateral on securities lent	5,492,415	(2,458,303)
Net increase (decrease) of other unsubordinated borrowings and debt securities in issue	1,352,249	(7,388,484)
Income taxes paid—net	(78,584)	(106,797)
Other operating activities—net	(1,488,690)	(1,312,248)
Net cash and cash equivalents provided by (used in) operating activities	4,572,202	(12,810,694)
Investing Activities:
Purchases of financial assets at fair value through profit or loss and investment securities	(17,447,417)	(15,404,357)
Proceeds from sales of financial assets at fair value through profit or loss and investment securities	4,351,295	11,051,492
Proceeds from maturities of financial assets at fair value through profit or loss and investment securities	8,997,999	11,892,293
Acquisitions of the subsidiaries and businesses, net of cash and cash equivalents acquired	(7)
Investments in associates and joint ventures	(126,574)
Proceeds from sales of investments in associates and joint ventures	138	4,512
Purchases of property, plant and equipment	(41,181)	(30,387)
Purchases of intangible assets	(111,371)	(93,017)
Proceeds from sales of property, plant and equipment	3,503	1,864
Net cash and cash equivalents provided by (used in) investing activities	(4,373,615)	7,422,400
Financing Activities:
Redemption of subordinated borrowings	(10,000)	(15,000)
Proceeds from issuance of subordinated bonds	141,033
Payments for the principal portion of lease liabilities	(46,198)	(44,825)
Proceeds from issuance of other equity instruments	360,806
Dividends paid to shareholders of Sumitomo Mitsui Financial Group, Inc.	(167,956)	(143,871)
Dividends paid to non-controlling interest shareholders	(3,307)	(2,713)
Coupons paid to other equity instruments holders	(5,769)	(5,606)
Purchases of treasury stock and proceeds from sales of treasury stock—net	(61,182)	240
Purchases of other equity instruments and proceeds from sales of other equity instruments—net	87	1,002
Transactions with non-controlling interest shareholders—net	(100)	956
Net cash and cash equivalents provided by (used in) financing activities	207,414	(209,817)
Effect of exchange rate changes on cash and cash equivalents	1,406,060	1,674,253
Net increase (decrease) of cash and cash equivalents	1,812,061	(3,923,858)
Cash and cash equivalents at beginning of period	75,344,235	74,343,953
Cash and cash equivalents at end of period	77,156,296	70,420,095
Net cash and cash equivalents provided by operating activities includes:
Interest and dividends received	2,795,638	1,367,994
Interest paid	¥ 1,778,547	¥ 510,259

General Information

General Information	6 Months Ended
	Sep. 30, 2023
Text block [abstract]
General Information	1 GENERAL INFORMATION Sumitomo Mitsui Financial Group, Inc. (the “Company” or “SMFG”) was established on December 2, 2002, as a holding company for Sumitomo Mitsui Banking Corporation (“SMBC”) and its subsidiaries through a statutory share transfer ( kabushiki-iten Kabushiki Kaisha The Company and its subsidiaries (the “Group”) offer a diverse range of financial services, including commercial banking, leasing, securities, consumer finance and other services together with its associates and joint ventures. The accompanying consolidated financial statements have been authorized for issue by the Management Committee on December 22, 2023.

Summary of Material Accounting

Summary of Material Accounting Policies	6 Months Ended
	Sep. 30, 2023
Text block [abstract]
Summary of Material Accounting Policies	2 SUMMARY OF MATERIAL ACCOUNTING POLICIES Basis of Preparation The interim consolidated financial statements, including selected explanatory notes, of the Group have been prepared in accordance with IAS 34 “Interim Financial Reporting” as issued by the International Accounting Standards Board (“IASB”). The interim consolidated financial statements should be read in conjunction with the Group’s consolidated financial statements for the fiscal year ended March 31, 2023, which have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the IASB. Material Accounting Policies The material accounting policies adopted in the preparation of the interim consolidated financial statements are consistent with those followed in the preparation of the Group’s consolidated financial statements for the fiscal year ended March 31, 2023. For the six months ended September 30, 2023, a number of amendments to standards have become effective; however, they have not resulted in any material impact on the Group’s interim consolidated financial statements. Recent Accounting Pronouncements The Group is currently assessing the impact of the following standards, amendments to standards, and interpretations that are not yet effective and have not been early adopted: Sale or Contribution of Assets between an Investor and its Associate or Joint Venture (Amendments to IFRS 10 and IAS 28) In September 2014, the IASB issued the narrow-scope amendments to IFRS 10 “Consolidated Financial Statements” and IAS 28 “Investments in Associates and Joint Ventures” to address an acknowledged inconsistency between the requirements in IFRS 10 and those in IAS 28, in dealing with the sale or contribution of assets between an investor and its associate or joint venture. The effective date of applying the amendments was January 1, 2016 when they were originally issued, however, in December 2015, the IASB issued Effective Date of Amendments to IFRS 10 and IAS 28 Classification of Liabilities as Current or Non-current In January 2020, the IASB issued narrow-scope amendments to IAS 1 “Presentation of Financial Statements” to clarify how to classify debt and other liabilities as current or non-current. non-current. Lease Liability in a Sale and Leaseback (Amendments to IFRS 16) In September 2022, the IASB issued narrow-scope amendments to IFRS 16 “Leases,” which add to subsequent measurement requirements for the lease liability arising from a sale and leaseback transaction. The amendments specify how to measure the lease liability when reporting after the date of the transaction. The amendments are effective for annual reporting periods beginning on or after January 1, 2024 and are not expected to have a material impact on the Group’s consolidated financial statements. Non-current In October 2022, the IASB issued amendments to IAS 1 to improve the information entities provide about long-term debt with covenants. The amendments to IAS 1 specify that covenants to be complied with after the reporting date do not affect the classification of debt as current or non-current Supplier Finance Arrangements (Amendments to IAS 7 and IFRS 7) In May 2023, the IASB issued amendments to IAS 7 “Statement of Cash Flows” and IFRS 7 “Financial Instruments: Disclosures,” which require an entity to provide disclosures to enhance the transparency of supplier finance arrangements and their effects on an entity’s liabilities, cash flows and exposure to liquidity risk. The amendments are effective for annual periods beginning on or after January 1, 2024 and are not expected to have a material impact on the Group’s consolidated financial statements. Lack of Exchangeability (Amendments to IAS 21) In August 2023, the IASB issued the amendments to IAS 21 “The Effects of Changes in Foreign Exchange Rates” to address a matter not previously covered in the accounting requirements for the effects of changes in foreign exchange rates. The amendments require entities to apply a consistent approach in assessing whether a currency can be exchanged into another currency. The amendments also require entities to determine the exchange rate and provide more useful information in their financial statements when a currency cannot be exchanged into another currency. The amendments are effective for annual periods beginning on or after January 1, 2025. The Group is currently evaluating the potential impact that the adoption of the amendments will have on its consolidated financial statements.

Critical Accounting Estimates a

Critical Accounting Estimates and Judgments	6 Months Ended
	Sep. 30, 2023
Text block [abstract]
Critical Accounting Estimates and Judgments	3 CRITICAL ACCOUNTING ESTIMATES AND JUDGMENTS The consolidated financial statements are influenced by estimates and management judgments, which necessarily have to be made in the course of preparation of the consolidated financial statements. Estimates and judgments are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances, and which are continually evaluated. For information on the estimation of the allowance for loan losses which reflects the current and forward-looking impact of the situation in Russia and Ukraine, the rising interest rates in foreign countries due to global monetary tightening and the subsequent effects following the mitigation of the COVID-19 year

Segment Analysis

Segment Analysis	6 Months Ended
	Sep. 30, 2023
Text block [abstract]
Segment Analysis	4 SEGMENT ANALYSIS Business Segments The Group’s business segment information is prepared based on the internal reporting system utilized by its management to assess the performance of its business segments under accounting principles generally accepted in Japan (“Japanese GAAP”). The Group has four main business segments: the Wholesale Business Unit, the Retail Business Unit, the Global Business Unit and the Global Markets Business Unit, with the remaining operations recorded in Head office account and others. Wholesale Business Unit The Wholesale Business Unit provides comprehensive solutions primarily for corporate clients in Japan that respond to wide-ranging client needs in relation to financing, investment management, risk hedging, settlement, M&A and other advisory services, digital services and leasing services. This business unit mainly consists of the wholesale businesses of SMBC, SMBC Trust Bank Ltd. (“SMBC Trust Bank”), Sumitomo Mitsui Finance and Leasing Company, Limited (“SMFL”), SMBC Nikko Securities Inc. (“SMBC Nikko Securities”), Sumitomo Mitsui Card Company, Limited (“Sumitomo Mitsui Card”) and SMBC Finance Service Co., Ltd. (“SMBC Finance Service”). Retail Business Unit The Retail Business Unit provides financial services to consumers residing in Japan and mainly consists of the retail businesses of SMBC, SMBC Trust Bank, SMBC Nikko Securities, Sumitomo Mitsui Card, SMBC Finance Service and SMBC Consumer Finance Co., Ltd. (“SMBC Consumer Finance”). This business unit offers a wide range of products and services for consumers, including wealth management services, settlement services, consumer finance and housing loans, in order to address the financial needs of all individual customers. Global Business Unit The Global Business Unit supports the global businesses of a diverse range of clients, such as Japanese companies operating overseas, non-Japanese income sales and trading, underwriting activities, Japanese stock brokerage and M&A advisory services. This business unit mainly consists of the global businesses of SMBC, SMBC Trust Bank, SMFL, SMBC Nikko Securities and their foreign subsidiaries. Global Markets Business Unit The Global Markets Business Unit offers solutions through foreign exchange products, derivatives, bonds, stocks and other marketable financial products, and also undertakes asset liability management operations, which help comprehensively control balance sheet liquidity risks and market risks. This business unit consists of the Global Markets and Treasury Unit of SMBC, which was renamed from the Treasury Unit in April 2023, and the Global Markets Division of SMBC Nikko Securities. Head office account and others The Head office account and others represent the difference between the aggregate of the Wholesale Business Unit, the Retail Business Unit, the Global Business Unit and the Global Markets Business Unit, and the Group as a whole. It mainly consists of administrative expenses related to headquarters operations and profit or loss from other subsidiaries including The Japan Research Institute, Limited and Sumitomo Mitsui DS Asset Management Company, Limited. It also includes the elimination items related to internal transactions between the Group companies. Measurement of Segment Profit or Loss The business segment information is prepared under the management approach. Consolidated net business profit is used as a profit indicator of banks in Japan. Consolidated net business profit of each segment is calculated by deducting general and administrative expenses (i.e., the total of personnel expense, non-personnel Information regarding the total assets of each segment is not used by management in deciding how to allocate resources and assess performance. Accordingly, total assets are not included in the business segment information. Segmental Results of Operations The following tables show the Group’s results of operations by business segment for the six months ended September 30, 2023 and 2022. The comparative information for the fiscal year ended September 30, 2022 has been restated to reflect the changes to the allocation logic from the Head office account and others to other business segments in the Group’s managerial accounting, which became effective from April 1, 2023, and to eliminate the impact of factors such as changes in interest rates and exchange rates that may distort the comparison. For the six months ended September 30, 2023: Wholesale Business Unit Retail Business Unit Global Business Unit Global Markets Business Unit Head office account and others Total (In billions) Consolidated gross profit (1) ¥ 396.9 ¥ 621.8 ¥ 670.5 ¥ 286.6 ¥ (158.5 ) ¥ 1,817.3 General and administrative expenses (151.9 ) (526.8 ) (391.0 ) (79.9 ) 67.4 (1,082.2 ) Others (2) 53.6 3.4 31.8 15.8 (68.8 ) 35.8 Consolidated net business profit ¥ 298.6 ¥ 98.4 ¥ 311.3 ¥ 222.5 ¥ (159.9 ) ¥ 770.9 For the six months ended September 30, 2022: Wholesale Business Unit Retail Business Unit Global Business Unit Global Markets Business Unit Head office account and others Total (In billions) Consolidated gross profit (1) ¥ 353.4 ¥ 567.9 ¥ 589.5 ¥ 266.7 ¥ (145.1 ) ¥ 1,632.4 General and administrative expenses (143.3 ) (487.7 ) (330.2 ) (73.6 ) 72.2 (962.6 ) Others (2) 48.8 2.1 47.1 15.4 (61.3 ) 52.1 Consolidated net business profit ¥ 258.9 ¥ 82.3 ¥ 306.4 ¥ 208.5 ¥ (134.2 ) ¥ 721.9 (1) Consolidated gross profit = (Interest income – Interest expenses) + Trust fees + (Fee and commission income – Fee and commission expenses) + (Trading income – Trading losses) + (Other operating income – Other operating expenses). (2) “Others” includes share of profit or loss of equity-method associates and joint ventures and cooperated profit and loss, that is, profit and loss double counted within the Group’s business segments in the managerial accounting. Reconciliation of Segmental Results of Operations to Consolidated Income Statements The figures provided in the tables above are calculated by aggregating the figures used for management reporting under Japanese GAAP for each segment. The total amount of consolidated net business profit that is calculated by each segment based on the internal managerial data is reconciled to profit before tax reported in the consolidated financial statements under IFRS as shown in the following table: For the six months ended 2023 2022 (In billions) Consolidated net business profit ¥ 770.9 ¥ 721.9 Differences between management reporting and Japanese GAAP: Total credit costs (100.3 ) (83.1 ) Gains on equity instruments 46.8 92.1 Extraordinary gains or losses and others (11.0 ) (6.2 ) Profit before tax under Japanese GAAP 706.4 724.7 Differences between Japanese GAAP and IFRS: Scope of consolidation 2.7 3.2 Derivative financial instruments 255.8 464.5 Investment securities (49.1 ) (105.6 ) Loans and advances (61.0 ) (33.2 ) Investments in associates and joint ventures 10.1 (28.7 ) Property, plant and equipment 0.4 (0.6 ) Lease accounting (0.9 ) — Defined benefit plans (26.8 ) (28.1 ) Foreign currency translation (16.3 ) (22.5 ) Classification of equity and liability 7.3 5.7 Others 42.4 45.2 Profit before tax under IFRS ¥ 871.0 ¥ 1,024.6

Derivative Financial Instrument

Derivative Financial Instruments and Hedge Accounting	6 Months Ended
	Sep. 30, 2023
Text block [abstract]
Derivative Financial Instruments and Hedge Accounting	5 DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGE ACCOUNTING Derivative financial instruments include futures, forwards, swaps, options and other types of derivative contracts, which are transactions listed on exchanges or over-the-counter Derivatives are financial instruments that derive their value from the price of underlying items such as interest rates, foreign exchange rates, equities, bonds, commodities, credit spreads and other indices. The Group’s derivative financial instruments mainly consist of interest rate derivatives and currency derivatives. Interest rate derivatives include interest rate swaps, interest rate options and interest rate futures. Currency derivatives include foreign exchange forward transactions, currency swaps and currency options. The tables b e At September 30, 2023 Trading Risk Management (1) Notional Assets Liabilities Notional Assets Liabilities (In millions) Interest rate derivatives ¥ 1,705,064,948 ¥ 7,105,501 ¥ 8,935,065 ¥ 63,920,478 ¥ 1,200,112 ¥ 1,355,496 Futures 158,410,820 42,383 44,662 1,562,264 2,253 947 Listed Options 187,933,727 52,836 36,721 — — — Forwards 31,225,313 78,469 72,821 — — — Swaps 1,047,934,282 5,731,168 6,064,799 62,150,298 1,197,859 1,310,443 OTC Options 279,560,806 1,200,645 2,716,062 207,916 — 44,106 Currency derivatives 247,544,947 4,353,447 2,417,493 25,068,889 251,956 2,471,902 Futures 980 — 181 — — — Listed Options — — — — — — Forwards 130,894,081 2,092,679 1,605,454 9,703,233 142,696 469,557 Swaps 106,052,283 2,027,596 538,251 15,365,656 109,260 2,002,345 OTC Options 10,597,603 233,172 273,607 — — — Equity derivatives 3,087,398 52,245 61,296 — — — Futures 1,726,002 23,713 19,235 — — — Listed Options 679,406 11,528 17,067 — — — Forwards 393,964 908 16,791 — — — Swaps 31,119 91 1,382 — — — OTC Options 256,907 16,005 6,821 — — — Commodity derivatives 130,997 13,379 12,178 — — — Futures 52,700 1,932 1,572 — — — Listed Options — — — — — — Forwards — — — — — — Swaps 65,539 11,251 10,168 — — — OTC Options 12,758 196 438 — — — Credit derivatives 3,164,779 38,654 45,285 — — — Total derivative financial instruments ¥ 1,958,993,069 ¥ 11,563,226 ¥ 11,471,317 ¥ 88,989,367 ¥ 1,452,068 ¥ 3,827,398 At March 31, 2023 Trading Risk Management (1) Notional Assets Liabilities Notional Assets Liabilities (In millions) Interest rate derivatives ¥ 1,691,197,124 ¥ 5,025,797 ¥ 6,380,627 ¥ 65,003,591 ¥ 763,819 ¥ 1,032,506 Futures 129,630,431 37,084 36,633 8,746,711 5,990 2,836 Listed Options 262,156,548 87,651 52,918 — — — Forwards 24,354,115 30,619 24,358 — — — Swaps 1,036,174,625 4,059,518 4,100,097 56,071,259 757,829 1,008,337 OTC Options 238,881,405 810,925 2,166,621 185,621 — 21,333 Currency derivatives 220,393,641 2,571,317 1,629,519 21,600,130 203,864 1,376,767 Futures 1,114 145 — — — — Listed Options — — — — — — Forwards 115,616,503 1,113,495 1,107,415 7,430,656 71,072 184,808 Swaps 93,961,952 1,282,512 352,236 14,169,474 132,792 1,191,959 OTC Options 10,814,072 175,165 169,868 — — — Equity derivatives 2,372,833 54,508 42,208 — — — Futures 1,369,369 11,259 16,491 — — — Listed Options 565,733 9,312 17,713 — — — Forwards 146,369 12,567 2 — — — Swaps 39,235 433 2,554 — — — OTC Options 252,127 20,937 5,448 — — — Commodity derivatives 129,488 9,142 7,946 — — — Futures 25,427 407 1,247 — — — Listed Options — — — — — — Forwards — — — — — — Swaps 73,010 8,567 6,331 — — — OTC Options 31,051 168 368 — — — Credit derivatives 2,893,477 21,500 27,282 — — — Total derivative financial instruments ¥ 1,916,986,563 ¥ 7,682,264 ¥ 8,087,582 ¥ 86,603,721 ¥ 967,683 ¥ 2,409,273 (1) Derivative financial instruments categorized as “Risk Management” are used for economic hedging, such as managing the exposure to changes in fair value of the loan portfolio, and are identified as hedging instruments under Japanese GAAP. Under IFRS, the Group applies hedge accounting for certain fixed rate debt securities in issue, borrowings, and debt instruments at fair value through other comprehensive income (“FVOCI”) and net investments in foreign operations. Derivative financial instruments designated as hedging instruments are also categorized as “Risk Management.” Hedge accounting The Group applies fair value hedge accounting and hedge accounting of net investments in foreign operations in order to reflect the effect of risk management activities on its consolidated financial statements. Fair value hedges The Group app l e At September 30, 2023 At March 31, 2023 Notional Carrying amounts Notional Carrying amounts Assets Liabilities Assets Liabilities (In millions) Interest rate risk Interest rate swaps ¥ 9,854,304 ¥ 139,607 ¥ 875,688 ¥ 8,264,813 ¥ 101,835 ¥ 587,049 Interest rate options 207,916 — 44,106 185,621 — 21,333 Hedges of net investments in foreign operations The Group applies hedge accounting of net investments in foreign operations to mitigate the foreign currency risk of exchange differences arising from the translation of net investments in foreign operations. The table below represents the amounts related to items designated as hedging instruments at September 30, 2023 and March 31, 2023. At September 30, 2023 At March 31, 2023 Nominal Carrying amounts Nominal Carrying amounts Assets Liabilities Assets Liabilities (In millions) Foreign exchange forward contracts ¥ 3,430,339 ¥ 32,887 ¥ 465,816 ¥ 3,088,524 ¥ 48,483 ¥ 147,366 Foreign currency denominated financial liabilities 322,840 — 322,840 287,072 — 287,072

Investment Securities

Investment Securities	6 Months Ended
	Sep. 30, 2023
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Investment Securities	6 INVESTMENT SECURITIES The following table shows the amount of investment securities, which consist of debt instruments at amortized cost, debt instruments at fair value through other comprehensive income and equity instruments at fair value through other comprehensive income at September 30, 2023 and March 31, 2023. At September 30, At March 31, (In millions) Debt instruments at amortized cost: Domestic: Japanese government bonds ¥ 78,556 ¥ 72,549 Japanese municipal bonds 128,649 93,044 Japanese corporate bonds 4,990 — Total domestic 212,195 165,593 Foreign: Bonds issued by other governments and official institutions (1) 72,689 68,121 Mortgage-backed securities 1,926 — Other debt instruments 3,241 1,853 Total foreign 77,856 69,974 Total debt instruments at amortized cost ¥ 290,051 ¥ 235,567 Debt instruments at fair value through other comprehensive income: Domestic: Japanese government bonds ¥ 9,512,127 ¥ 9,576,298 Japanese municipal bonds 1,077,443 1,087,625 Japanese corporate bonds 910,839 946,726 Other debt instruments 313 312 Total domestic 11,500,722 11,610,961 Foreign: U.S. Treasury and other U.S. government agency bonds 9,825,401 5,232,456 Bonds issued by other governments and official institutions (1) 3,416,633 2,991,272 Mortgage-backed securities 3,151,857 2,379,250 Other debt instruments 651,193 597,484 Total foreign 17,045,084 11,200,462 Total debt instruments at fair value through other comprehensive income ¥ 28,545,806 ¥ 22,811,423 Equity instruments at fair value through other comprehensive income: Domestic equity instruments ¥ 4,071,827 ¥ 3,587,964 Foreign equity instruments 1,175,046 960,644 Total equity instruments at fair value through other comprehensive income ¥ 5,246,873 ¥ 4,548,608 Total investment securities ¥ 34,082,730 ¥ 27,595,598 (1) Bonds issued by governments and official institutions excluding U.S. Treasury and other U.S. government agencies.

Loans and Advances

Loans and Advances	6 Months Ended
	Sep. 30, 2023
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Loans and Advances	7 LOANS AND ADVANCES The following tables present loans and advances at September 30, 2023 and March 31, 2023. At September 30, 2023 12-month Lifetime ECL Lifetime ECL credit-impaired Total (In millions) Loans and advances at amortized cost: Gross loans and advances ¥ 112,702,852 ¥ 3,770,596 ¥ 1,207,957 ¥ 117,681,405 Adjust: Unearned income, unamortized premiums—net and deferred loan fees—net (446,390 ) Less: Allowance for loan losses (206,054 ) (257,488 ) (486,089 ) (949,631 ) Carrying amount ¥ 116,285,384 At March 31, 2023 12-month Lifetime ECL Lifetime ECL Total (In millions) Loans and advances at amortized cost: Gross loans and advances ¥ 108,254,496 ¥ 3,718,669 ¥ 1,170,662 ¥ 113,143,827 Adjust: Unearned income, unamortized premiums—net and deferred loan fees—net (388,579 ) Less: Allowance for loan losses (187,455 ) (240,494 ) (436,165 ) (864,114 ) Carrying amount ¥ 111,891,134 Reconciliation of allowance for loan losses is as follows: At September 30, 2023 12-month ECL Lifetime ECL Lifetime ECL credit-impaired Total (In millions) Allowance for loan losses: Balance at April 1, 2023 ¥ 187,455 ¥ 240,494 ¥ 436,165 ¥ 864,114 Net transfers between stages (1,301 ) (9,373 ) 10,674 — Provision for loan losses 12,665 18,250 99,068 129,983 Charge-offs (1) — — 91,512 91,512 Recoveries — — 8,049 8,049 Net charge-offs — — 83,463 83,463 Others (2) 7,235 8,117 23,645 38,997 Balance at September 30, 2023 ¥ 206,054 ¥ 257,488 ¥ 486,089 ¥ 949,631 At September 30, 2022 12-month Lifetime ECL Lifetime ECL Total (In millions) Allowance for loan losses: Balance at April 1, 2022 ¥ 162,919 ¥ 247,020 ¥ 583,115 ¥ 993,054 Net transfers between stages (7,616 ) (8,529 ) 16,145 — Provision for loan losses 12,104 5,737 69,148 86,989 Charge-offs (1) — — 142,198 142,198 Recoveries — — 10,467 10,467 Net charge-offs — — 131,731 131,731 Others (2) 7,882 14,052 19,922 41,856 Balance at September 30, 2022 ¥ 175,289 ¥ 258,280 ¥ 556,599 ¥ 990,168 (1) Charge-offs consist of the reduction of the allowance through the sales of loans and write-offs. (2) Others mainly include foreign exchange translations for the six months ended September 30, 2023 and 2022. The allowance for loan losses is measured under the expected credit losses (“ECL”) model which requires the use of complex models and significant assumptions about future economic conditions and credit behavior. For the six months ended September 30, 2023, the obligor grading, macroeconomic factors and additional ECL adjustments used to determine the final ECL reflected the current and forward-looking impact of the situation in Russia and Ukraine, the rising interest rates in foreign countries due to global monetary tightening and the subsequent effects following the mitigation of the COVID-19 The macroeconomic scenarios for incorporating forward-looking information in the ECL measurement were updated, reflecting the recent economic forecasts. The Group assumed that the Japanese economy would continue to recover during the fiscal years ending March 31, 2024 and 2025, driven by an increase in the consumption of services such as dining out and travel, which had been suppressed by the COVID-19 based on the premises of the base scenario and past macroeconomic experience. The following table shows the growth rates of the Japanese and global GDP, which are the key factors of the macroeconomic scenarios, under the base scenario. For the fiscal year ending March 31, 2024 2025 (%) Japanese GDP 6.2 2.6 Global GDP 3.0 3.1 In determining the need for making additional ECL adjustments, the Group considered whether there is an increase in the credit risk for some portfolios which had a material adverse impact resulting from the sanctions imposed in connection with Russia’s aggression against Ukraine, the rising interest rates in foreign countries due to the global monetary tightening, or the subsequent effects following the mitigation of the COVID-19 COVID-19 COVID-19 As a result, for the six months ended September 30, 2023, the allowance for loan losses increased by ¥85,517 million from ¥864,114 million at beginning of period to ¥949,631 million at end of period primarily due to an increase in allowance of lifetime ECL credit-impaired. Th is

Borrowings

Borrowings	6 Months Ended
	Sep. 30, 2023
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Borrowings	8 BORROWINGS Borrowings at September 30, 2023 and March 31, 2023 consisted of the following: At September 30, At March 31, (In millions) Unsubordinated borrowings ¥ 14,247,306 ¥ 13,532,217 Subordinated borrowings 177,412 186,218 Liabilities associated with securitization transactions 1,210,393 1,236,369 Lease liabilities 425,079 416,997 Total borrowings ¥ 16,060,190 ¥ 15,371,801

Debt Securities in Issue

Debt Securities in Issue	6 Months Ended
	Sep. 30, 2023
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Debt Securities in Issue	9 DEBT SECURITIES IN ISSUE Debt securities in issue at September 30, 2023 and March 31, 2023 consisted of the following: At September 30, At March 31, (In millions) Commercial paper ¥ 2,874,209 ¥ 2,585,889 Unsubordinated bonds 9,572,275 8,285,355 Subordinated bonds 1,279,332 1,113,750 Total debt securities in issue ¥ 13,725,816 ¥ 11,984,994

Provisions

Provisions	6 Months Ended
	Sep. 30, 2023
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Provisions	10 PROVISIONS The following table presents movements by class of provisions for the six months ended September 30, 2023. Provision for Other provisions Total (In millions) Balance at April 1, 2023 ¥ 128,234 ¥ 119,110 ¥ 247,344 Additional provisions — 4,386 4,386 Amounts used (16,110 ) (4,231 ) (20,341 ) Unused amounts reversed — (5,903 ) (5,903 ) Amortization of discount and effect of change in discount rate (516 ) 78 (438 ) Others — 348 348 Balance at September 30, 2023 ¥ 111,608 ¥ 113,788 ¥ 225,396 Provision for Interest Repayment Japan has two laws restricting interest rates on loans. The Interest Rate Restriction Act sets the maximum interest rates on loans ranging from 15% to 20%. The Act Regulating the Receipt of Contributions, Receipt of Deposits and Interest Rates capped the interest rate on loans at 29.2% up to June 2010. Interest rates on loans greater than the range of 15-20% In January 2006, judicial decisions strictly interpreted the conditions under which consumer finance companies may retain gray zone interest. As a result, claims for refunds of gray zone interest have increased, and consumer lending and credit card companies have recorded a provision for claims for refunds of gray zone interest. In December 2006, the Government of Japan made amendments to laws regulating money lenders to implement regulatory reforms affecting the consumer finance industry. As a result, in June 2010, the maximum legal interest rates on loans were reduced to the range of 15-20%, The provision for interest repayment is calculated by estimating the future claims for the refund of gray zone interest, taking into account historical experience such as the number of customer claims for a refund, the amount of repayments and the characteristics of customers, and the length of the period during which claims are expected to be received in the future. The timing of the settlement of these claims is uncertain. For the six months ended September 30, 2023, the provision for interest repayment decreased primarily due to the use of the provision. Other Provisions Other provisions include asset retirement obligations and provisions for loan commitments, reimbursement of deposits, point programs and litigation claims. Most of these provisions occurred in the normal course of business and none of them were individually significant at September 30, 2023 and April 1, 2023.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Sep. 30, 2023
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Shareholders' Equity	11 SHAREHOLDERS’ EQUITY Common Stock The number of issued shares of common stock and common stock held by the Company at September 30, 2023 and March 31, 2023 was as follows: At September 30, At March 31, Shares outstanding 1,337,529,084 1,374,691,194 Shares in treasury 3,455,590 30,070,650 The total number of authorized shares of common stock was 3,000 million at September 30, 2023 and March 31, 2023 with no stated value. On November 14, 2022 The resolution authorized the repurchase of up to the lesser of (i) an aggregate of 61,000,000 shares of its common stock and (ii) an aggregate of ¥200 billion between November 15, 2022 and May 31, 2023. On May 31, 2023, the Company completed the repurchase pursuant to the resolution, acquiring 37,640,000 shares of its common stock for ¥200 billion in aggregate. The Company cancelled all the repurchased shares on June 20, 2023. On November 14, 2023, the Company’s board of directors resolved to repurchase shares of its common stock and cancel all the repurchased shares. The resolution authorized the repurchase of up to the lesser of (i) an aggregate of 26,000,000 shares of its common stock and (ii) an aggregate of ¥150 billion between November 15, 2023 and March 31, 2024. During November 2023, the Company entered into contracts to repurchase 3,568,800 shares of common stock for ¥26 billion in aggregate. Preferred Stock The following table shows the number of shares of preferred stock at September 30, 2023 and March 31, 2023. At September 30, 2023 At March 31, 2023 Authorized Issued Authorized Issued Type 5 preferred stock 167,000 — 167,000 — Type 7 preferred stock 167,000 — 167,000 — Type 8 preferred stock 115,000 — 115,000 — Type 9 preferred stock 115,000 — 115,000 —

Equity Attributable To Other Eq

Equity Attributable To Other Equity Instruments Holders	6 Months Ended
	Sep. 30, 2023
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Equity Attributable To Other Equity Instruments Holders	12 EQUITY ATTRIBUTABLE TO OTHER EQUITY INSTRUMENTS HOLDERS Equity attributable to other equity instruments holders at September 30, 2023 and March 31, 2023 consisted of the following: At September 30, At March 31, (In millions) Perpetual subordinated bonds ¥ 1,106,695 ¥ 755,802 Perpetual subordinated borrowings ¥ 20,000 ¥ 10,000 Total equity attributable to other equity instruments holders ¥ 1,126,695 ¥ 765,802 Equity attributable to other equity instruments holders consists of perpetual subordinated bonds and perpetual subordinated borrowings which are Basel III-compliant The bonds and borrowings bear a fixed rate of interest until the first call date. After the first call date, they will bear a floating rate of interest unless they are redeemed. SMFG may at any time and in its sole discretion, elect to cancel any interest payment. If cancelled, interest payments are non-cumulative These bonds and borrowings are undated, have no final maturity date and may be redeemed at SMFG’s option, in whole, but not in part, on the first call date or any interest payment dates thereafter subject to prior confirmation of the Financial Services Agency of Japan (“FSA”). The principal amount of the bonds and borrowings may be written down upon the occurrence of certain trigger events. For example, if the Common Equity Tier 1 capital ratio falls below 5.125% (“Capital Ratio Event”), the principal amount required to fully restore the Common Equity Tier 1 capital ratio above 5.125% will be written down. The principal amount of the bonds and borrowings which has been written down due to a Capital Ratio Event may be reinstated at SMFG’s option, subject to prior confirmation of the FSA that the Common Equity Tier 1 capital ratio remains at a sufficiently high level after giving effect to such reinstatement.

Fee and Commission Income

Fee and Commission Income	6 Months Ended
	Sep. 30, 2023
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Fee and Commission Income	13 FEE AND COMMISSION INCOME Fee and commission income for the six months ended September 30, 2023 and 2022 consisted of the following: For the six months ended 2023 2022 (In millions) Loans ¥ 71,500 ¥ 68,340 Credit card business 207,529 181,965 Guarantees 41,245 35,386 Securities-related business 88,549 55,537 Deposits 9,016 8,560 Remittances and transfers 74,658 73,526 Safe deposits 2,195 2,051 Trust fees 3,785 3,044 Investment trusts 82,543 74,220 Agency 4,746 4,630 Others 104,949 100,287 Total fee and commission income ¥ 690,715 ¥ 607,546 Fee and commission income can be mainly disaggregated into loans, credit card business, securities-related business, remittances and transfers and investment trusts by types of services. Loan transaction fees principally arise in the Wholesale Business Unit and the Global Business Unit. Fees obtained through credit card business principally arise in the Retail Business Unit. Fees obtained through securities-related business principally arise in the Wholesale Business Unit, the Retail Business Unit and the Global Business Unit. Remittance and transfer fees principally arise in the Wholesale Business Unit, the Retail Business Unit and the Global Business Unit. Fees and commissions obtained through investment trusts principally arise in the Retail Business Unit and Head office account and others, which include the investment advisory and investment trust management businesses.

Impairment Charges on Financial

Impairment Charges on Financial Assets	6 Months Ended
	Sep. 30, 2023
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Impairment Charges on Financial Assets	14 IMPAIRMENT CHARGES ON FINANCIAL ASSETS Impairment charges (reversals) on financial assets for the six months ended September 30, 2023 and 2022 consisted of the following: For the six months ended September 30, 2023 2022 (In millions) Loans and advances ¥ 129,983 ¥ 86,989 Loan commitments (5,132 ) (7,429 ) Financial guarantees 5,402 8,465 Total impairment charges on financial assets ¥ 130,253 ¥ 88,025

Earnings Per Share

Earnings Per Share	6 Months Ended
	Sep. 30, 2023
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Earnings Per Share	15 EARNINGS PER SHARE The following table shows the income and share data used in the basic and diluted earnings per share calculations for the six months ended September 30, 2023 and 2022. For the six months ended September 30, 2023 2022 (In millions, except number of shares and per share data) Basic: Profit attributable to shareholders of the Company ¥ 651,127 ¥ 762,185 Weighted average number of common stock in issue (in thousands of shares) 1,334,846 1,371,054 Basic earnings per share ¥ 487.79 ¥ 555.91 Diluted: Profit attributable to the common shareholders of the Company ¥ 651,127 ¥ 762,185 Impact of dilutive potential ordinary shares issued by subsidiaries and associates (2 ) — Net profit used to determine diluted earnings per share ¥ 651,125 ¥ 762,185 Weighted average number of common stock in issue (in thousands of shares) 1,334,846 1,371,054 Adjustments for stock options (in thousands of shares) 397 478 Weighted average number of common stock for diluted earnings per share (in thousands of shares) 1,335,243 1,371,532 Diluted earnings per share ¥ 487.65 ¥ 555.72

Dividends Per Share

Dividends Per Share	6 Months Ended
	Sep. 30, 2023
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Dividends Per Share	16 DIVIDENDS PER SHARE The dividends recognized by the Company for the six months ended September 30, 2023 and 2022 were as follows: Per share Aggregate amount (In yen) (In millions) Dividends on common stock for the six months ended September 30, 2023 ¥ 125 ¥ 168,078 2022 ¥ 105 ¥ 143,936 On November 14

Contingency and Capital Commitm

Contingency and Capital Commitments	6 Months Ended
	Sep. 30, 2023
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Contingency and Capital Commitments	17 CONTINGENCY AND CAPITAL COMMITMENTS Legal Proceedings The Group is engaged in various legal proceedings in Japan and a number of overseas jurisdictions, involving claims by and against it, which arise in the normal course of business. The Group does not expect that the outcome of these proceedings will have a significant adverse effect on the consolidated financial statements of the Group. The Group has recorded adequate provisions with respect to litigation arising out of normal business operations. The Group has not disclosed any contingent liability associated with these legal actions because it cannot reliably be estimated. Capital Commitments At September 30, 2023 and March 31, 2023, the Group had ¥1,365 million and ¥1,134 million, respectively, of contractual commitments to acquire property, plant and equipment. In addition, the Group had ¥1,219 million and ¥631 million of contractual commitments to acquire intangible assets, at September 30, 2023 and March 31, 2023, respectively. The Group’s management is confident that future net revenues and funding will be sufficient to cover these commitments. Loan Commitments and Financial Guarantees and Other Credit-related Contingent Liabilities Loan commitment contracts on overdrafts and loans are agreements to lend up to a prescribed amount to customers, as long as there is no violation of any condition established in the contracts. However, since many of these loan commitments are expected to expire without being drawn down, the total amount of unused commitments does not necessarily represent an actual future cash flow requirement. Many of these loan commitments include clauses under which the Group can reject an application from customers or reduce the contract amounts in cases where economic conditions change, the Group needs to secure claims, or some other significant event occurs. Financial guarantees are contracts that require the issuer to make specified payments to reimburse the holder for a loss it incurs because a specified debtor fails to make payments when due in accordance with the terms of the debt instrument. Other credit-related contingent liabilities include performance bonds, which are contracts that provide compensation if another party fails to perform the contractual obligation. The table below shows the nominal amounts of undrawn loan commitments, and financial guarantees and other credit-related contingent liabilities at September 30, 2023 and March 31, 2023. At September 30, 2023 At March 31, 2023 (In millions) Loan commitments ¥ 85,878,811 ¥ 79,068,816 Financial guarantees and other credit-related contingent liabilities 14,605,432 13,693,772 Total ¥ 100,484,243 ¥ 92,762,588

Fair Value of Financial Assets

Fair Value of Financial Assets and Liabilities	6 Months Ended
	Sep. 30, 2023
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Fair Value of Financial Assets and Liabilities	18 FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES Accounting policies and the valuation process of fair value measurement for the six months ended September 30, 2023 are consistent with those described in Note 44 “Fair Value of Financial Assets and Liabilities” of the Group’s consolidated financial statements for the fiscal year ended March 31, 2023. Financial Assets and Liabilities Carried at Fair Value Fair Value Hierarchy The following tables present the carrying amounts of financial assets and liabilities carried at fair value based on the three levels of the fair value hierarchy at September 30, 2023 and March 31, 2023. The three levels of the fair value hierarchy are as follows: • quoted prices (unadjusted) in active markets for identical assets or liabilities that the entity can access at the measurement date (Level 1); • inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly (Level 2); and • significant unobservable inputs for the asset or liability (Level 3). At September 30, 2023 Level 1 (1) Level 2 (1) Level 3 Total (In millions) Financial assets: Trading assets: Debt instruments ¥ 4,004,541 ¥ 944,694 ¥ — ¥ 4,949,235 Equity instruments 361,105 658 — 361,763 Total trading assets 4,365,646 945,352 — 5,310,998 Derivative financial instruments: Interest rate derivatives 97,472 8,208,059 82 8,305,613 Currency derivatives — 4,604,469 934 4,605,403 Equity derivatives 35,241 408 16,596 52,245 Commodity derivatives 1,932 11,447 — 13,379 Credit derivatives — 38,244 410 38,654 Total derivative financial instruments 134,645 12,862,627 18,022 13,015,294 Financial assets at fair value through profit or loss: Debt instruments 506,426 641,478 666,125 1,814,029 Equity instruments 1,934 284 84,215 86,433 Total financial assets at fair value through profit or loss 508,360 641,762 750,340 1,900,462 Investment securities at fair value through other comprehensive income: Japanese government bonds 9,512,127 — — 9,512,127 U.S. Treasury and other U.S. government agency bonds 9,825,401 — — 9,825,401 Other debt instruments 1,387,551 7,820,727 — 9,208,278 Total debt instruments 20,725,079 7,820,727 — 28,545,806 Equity instruments 4,744,887 1,501 500,485 5,246,873 Total investment securities at fair value through other comprehensive income 25,469,966 7,822,228 500,485 33,792,679 Total ¥ 30,478,617 ¥ 22,271,969 ¥ 1,268,847 ¥ 54,019,433 Financial liabilities: Trading liabilities: Debt instruments ¥ 3,574,685 ¥ 217,374 ¥ — ¥ 3,792,059 Equity instruments 389,454 5,639 — 395,093 Total trading liabilities 3,964,139 223,013 — 4,187,152 Derivative financial instruments: Interest rate derivatives 82,330 10,204,113 4,118 10,290,561 Currency derivatives 181 4,884,340 4,874 4,889,395 Equity derivatives 36,302 17,768 7,226 61,296 Commodity derivatives 1,572 10,606 — 12,178 Credit derivatives — 45,174 111 45,285 Total derivative financial instruments 120,385 15,162,001 16,329 15,298,715 Financial liabilities designated at fair value through profit or loss — 285,442 135,950 421,392 Others (2) — (6,728 ) (12,559 ) (19,287 ) Total ¥ 4,084,524 ¥ 15,663,728 ¥ 139,720 ¥ 19,887,972 At March Level 1 (1) Level 2 (1) Level 3 Total (In millions) Financial assets: Trading assets: Debt instruments ¥ 3,732,551 ¥ 497,294 ¥ — ¥ 4,229,845 Equity instruments 340,365 15,705 — 356,070 Total trading assets 4,072,916 512,999 — 4,585,915 Derivative financial instruments: Interest rate derivatives 130,725 5,658,891 — 5,789,616 Currency derivatives 145 2,774,537 499 2,775,181 Equity derivatives 20,571 13,002 20,935 54,508 Commodity derivatives 407 8,735 — 9,142 Credit derivatives — 21,142 358 21,500 Total derivative financial instruments 151,848 8,476,307 21,792 8,649,947 Financial assets at fair value through profit or loss: Debt instruments 343,539 398,883 650,467 1,392,889 Equity instruments 2,829 7,320 85,201 95,350 Total financial assets at fair value through profit or loss 346,368 406,203 735,668 1,488,239 Investment securities at fair value through other comprehensive income: Japanese government bonds 9,576,298 — — 9,576,298 U.S. Treasury and other U.S. government agency bonds 5,232,456 — — 5,232,456 Other debt instruments 1,503,857 6,498,812 — 8,002,669 Total debt instruments 16,312,611 6,498,812 — 22,811,423 Equity instruments 4,076,610 7,177 464,821 4,548,608 Total investment securities at fair value through other comprehensive income 20,389,221 6,505,989 464,821 27,360,031 Total ¥ 24,960,353 ¥ 15,901,498 ¥ 1,222,281 ¥ 42,084,132 Financial liabilities: Trading liabilities: Debt instruments ¥ 3,017,272 ¥ 84,161 ¥ — ¥ 3,101,433 Equity instruments 183,935 5,721 — 189,656 Total trading liabilities 3,201,207 89,882 — 3,291,089 Derivative financial instruments: Interest rate derivatives 92,387 7,317,498 3,248 7,413,133 Currency derivatives — 3,001,220 5,066 3,006,286 Equity derivatives 34,204 894 7,110 42,208 Commodity derivatives 1,247 6,699 — 7,946 Credit derivatives — 27,074 208 27,282 Total derivative financial instruments 127,838 10,353,385 15,632 10,496,855 Financial liabilities designated at fair value through profit or loss — 229,086 185,020 414,106 Others (2) — (4,086 ) (7,852 ) (11,938 ) Total ¥ 3,329,045 ¥ 10,668,267 ¥ 192,800 ¥ 14,190,112 (1) Transfers between levels of the fair value hierarchy are deemed to have occurred at the beginning of the period. There were no significant transfers between Level 1 and Level 2 for the six months ended September 30, 2023 and for the fiscal year ended March 31, 2023. (2) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract. The separated embedded derivatives are measured at fair value using the valuation techniques described in “Derivative financial instruments (including embedded derivatives)” in Note 44 “Fair Value of Financial Assets and Liabilities” of the Group’s consolidated financial statements for the fiscal year ended March 31, 2023. The following tables present reconciliations from the beginning to the ending balances for financial assets and liabilities carried at fair value and categorized within Level 3 of the fair value hierarchy for the six months ended September 30, 2023 and 2022. Total gains (losses) Changes in related to assets At April 1, Included in Included in Purchases Sales Issuances Settlements (1) Transfers (2) Transfers (2) At (In millions) Derivative financial instruments—net: Interest rate derivatives—net ¥ (3,248 ) ¥ (2,329 ) ¥ — ¥ 1,541 ¥ — ¥ — ¥ — ¥ — ¥ — ¥ (4,036 ) ¥ (1,031 ) Currency derivatives—net (4,567 ) 663 — 74 (110 ) — — — — (3,940 ) 580 Equity derivatives—net 13,825 (1,867 ) — 2,123 (4,711 ) — — — — 9,370 2,067 Credit derivatives—net 150 149 — — — — — — — 299 148 Total derivative financial instruments—net 6,160 (3,384 ) — 3,738 (4,821 ) — — — — 1,693 1,764 Financial assets at fair value through profit or loss: Debt instruments 650,467 32,792 305 54,432 (38,883 ) — (29,456 ) — (3,532 ) 666,125 32,586 Equity instruments 85,201 (892 ) — 5,770 (792 ) — (4,315 ) — (757 ) 84,215 (1,473 ) Total financial assets at fair value through profit or loss 735,668 31,900 305 60,202 (39,675 ) — (33,771 ) — (4,289 ) 750,340 31,113 Investment securities at fair value through other comprehensive income: Equity instruments 464,821 — 37,478 806 (2,120 ) — (117 ) — (383 ) 500,485 — Total investment securities at fair value through other comprehensive income 464,821 — 37,478 806 (2,120 ) — (117 ) — (383 ) 500,485 — Financial liabilities designated at fair value through profit or loss (185,020 ) (10,861 ) (957 ) — — (14,957 ) 75,845 — — (135,950 ) 516 Others (3) 7,852 5,049 — — — — — — (342 ) 12,559 5,017 Total ¥ 1,029,481 ¥ 22,704 ¥ 36,826 ¥ 64,746 ¥ (46,616) ¥ (14,957) ¥ 41,957 ¥ — ¥ (5,014 ) ¥ 1,129,127 ¥ 38,410 Total gains (losses) Changes in related to assets At April 1, Included in Included in Purchases Sales Issuances Settlements (1) Transfers (2) Transfers (2) At (In millions) Derivative financial instruments—net: Interest rate derivatives—net ¥ (7,162 ) ¥ (3,439 ) ¥ — ¥ 8 ¥ — ¥ — ¥ — ¥ — ¥ — ¥ (10,593 ) ¥ (3,409 ) Currency derivatives—net 1,652 (1,445 ) — — — — — — (5,522 ) (5,315 ) (2,099 ) Equity derivatives—net 15,384 3,709 — 2,609 (5,104 ) — — — — 16,598 6,924 Credit derivatives—net 521 (500 ) — — — — — — — 21 (494 ) Total derivative financial instruments—net 10,395 (1,675 ) — 2,617 (5,104 ) — — — (5,522 ) 711 922 Financial assets at fair value through profit or loss: Debt instruments 693,013 25,736 398 68,177 (40,242 ) — (33,344 ) — (80,259 ) 633,479 26,808 Equity instruments 35,884 76 — 4,403 (161 ) — (633 ) — (459 ) 39,110 (48 ) Total financial assets at fair value through profit or loss 728,897 25,812 398 72,580 (40,403 ) — (33,977 ) — (80,718 ) 672,589 26,760 Investment securities at fair value through other comprehensive income: Equity instruments 468,713 — (6,391 ) 2,175 (3,972 ) — (64 ) — — 460,461 — Total investment securities at fair value through other comprehensive income 468,713 — (6,391 ) 2,175 (3,972 ) — (64 ) — — 460,461 — Financial liabilities designated at fair value through profit or loss (291,086 ) 41,262 220 — — (44,886 ) 65,889 — — (228,601 ) 57,436 Others (3) 3,052 7,567 — 940 — — — — (1,363 ) 10,196 8,185 Total ¥ 919,971 ¥ 72,966 ¥ (5,773 ) ¥ 78,312 ¥ (49,479) ¥ (44,886 ) ¥ 31,848 ¥ — ¥ (87,603 ) ¥ 915,356 ¥ 93,303 (1) Settlements for equity instruments include redemption of preferred stocks and receipt of cash distributions which represent a return of investment. (2) Transfers between levels of the fair value hierarchy are deemed to have occurred at the beginning of the period. For the six months ended September 30, 2023 and 2022, transfers out of Level 3 amounted to ¥ million and ¥ million, respectively. Those transfers out of Level 3 were primarily due to a decrease of significance of unobservable inputs of certain financial assets at fair value through profit or loss, including certain investment funds. (3) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract. The following table presents total gains or losses included in profit or loss for the Level 3 financial assets and liabilities, and changes in unrealized gains or losses included in profit or loss related to those financial assets and liabilities held at September 30, 2023 and 2022 by line item of the consolidated income statements. Total gains (losses) included in Changes in unrealized gains 2023 2022 2023 2022 (In millions) Net interest income ¥ 559 ¥ 861 ¥ 525 ¥ 576 Net trading income 1,106 5,120 6,256 8,531 Net income from financial assets and liabilities at fair value through profit or loss 21,039 67,074 31,629 84,196 Other expenses — 89 — — Total ¥ 22,704 ¥ 72,966 ¥ 38,410 ¥ 93,303 The aggregate deferred day one profit yet to be recognized in profit or loss at the beginning and end of the six months ended September 30, 2023 and 2022, and reconciliation of changes in the balances were as follows: For the six months ended September 30, 2023 2022 (In millions) Balance at beginning of period ¥ 22,276 ¥ 27,100 Increase due to new trades 1,861 7,061 Reduction due to redemption, sales or passage of time (10,649 ) (16,017 ) Balance at end of period ¥ 13,488 ¥ 18,144 The Group has entered into transactions where the fair value is determined using valuation techniques for which not all inputs are observable in the market. The difference between the transaction price and the fair value that would be determined at initial recognition using a valuation technique is referred to as “day one profit and loss,” which is not recognized immediately in the consolidated income statements. The table above shows the day one profit and loss balances, all of which are derived from derivative financial instruments, financial assets at fair value through profit or loss and financial liabilities designated at fair value through profit or loss. The release to profit or loss results from the realization due to redemption or sales, and the amortization of the deferred day one profit and loss with the passage of time over the life of the instruments. Valuation Techniques Valuation techniques are consistent with those described in Note 44 “Fair Value of Financial Assets and Liabilities” of the Group’s consolidated financial statements for the fiscal year ended March 31, 2023. Significant Unobservable Inputs The following tables present quantitative information about significant unobservable inputs used in the fair value measurement for Level 3 financial assets and liabilities at September 30, 2023 and March 31, 2023. Qualitative information about significant unobservable inputs is consistent with those described in Note 44 “Fair Value of Financial Assets and Liabilities” of the Group’s consolidated financial statements for the fiscal year ended March 31, 2023. At September 30, 2023 Assets Liabilities Valuation technique(s) (1) Significant unobservable inputs (1) Range of (1) (In millions) Derivative financial instruments: Interest rate derivatives ¥ 82 ¥ 4,118 Option model Interest rate to interest rate correlation 31%-99% Quanto correlation (5% ) Interest rate volatility 3%-8% Currency derivatives 934 4,874 Option model Interest rate to interest rate correlation 26%-99% Quanto correlation 5%-49% Foreign exchange volatility 8%-15% Equity derivatives 16,596 7,226 Option model Equity to equity correlation 45%-91% Quanto correlation (29% ) Equity volatility 16%-57% Credit derivatives 410 111 Credit Default model Quanto correlation 18%-28% Financial assets at fair value through profit or loss: Debt instruments 666,125 — Option model Foreign exchange volatility 12%-42% DCF model Probability of default rate 0%-32% Loss given default rate 0%-100% Discount margin 5%-9% Net asset value (2) — — Equity instruments 84,215 — Market multiples Price/Book value multiple 0.7x Liquidity discount 20% DCF model Probability of default rate 0%-1% Loss given default rate 90% See note (3) below — — Investment securities at fair value through other comprehensive Equity instruments 500,485 — Market multiples Price/Book value multiple 0.3x-3.5x Liquidity discount 20% See note (3) below — — Financial liabilities designated at fair value through profit or — 135,950 Option model Equity to equity correlation 43%-89% Interest rate to interest rate correlation 26%-27% Quanto correlation (29% ) Equity volatility 18%-45% Credit Default model Quanto correlation 18%-28% Others (4) — (12,559 ) Option model Interest rate to interest rate correlation 26%-99% Quanto correlation (5% ) Equity volatility 27%-28% Foreign exchange volatility 10%-42% Credit Default model Quanto correlation 18%-28% At March 31, 2023 Assets Liabilities Valuation technique(s) (1) Significant unobservable inputs (1) Range of (1) (In millions) Derivative financial instruments: Interest rate derivatives ¥ — ¥ 3,248 Option model Interest rate to interest rate correlation 26%-99% Quanto correlation (11%)-42% Currency derivatives 499 5,066 Option model Interest rate to interest rate correlation 29%-99% Quanto correlation 8%-50% Foreign exchange volatility 12%-36% Equity derivatives 20,935 7,110 Option model Equity to equity correlation 48%-92% Quanto correlation (13%)-38% Equity volatility 12%-70% Credit derivatives 358 208 Credit Default model Quanto correlation 15%-25% Financial assets at fair value through profit or loss: Debt instruments 650,467 — Option model Foreign exchange volatility 13%-43% DCF model Probability of default rate 0%-33% Loss given default rate 0%-100% Discount margin 5%-9% Net asset value (2) — — Equity instruments 85,201 — Market multiples Price/Book value multiple 1.1x DCF model Probability of default rate 0%-1% Loss given default rate 90% See note (3) below — — Investment securities at fair value through other comprehensive income: Equity instruments 464,821 — Market multiples Price/Book value multiple 0.2x-3.7x Liquidity discount 20% See note (3) below — — Financial liabilities designated at fair value through profit or loss — 185,020 Option model Equity to equity correlation 47%-93% Interest rate to interest rate correlation 29%-30% Quanto correlation (13%)-50% Equity volatility 17%-52% Credit Default model Quanto correlation 15%-25% Others (4) — (7,852 ) Option model Equity to equity correlation 80%-83% Interest rate to interest rate correlation 26%-99% Quanto correlation (11%)-50% Equity volatility 24%-28% Foreign exchange volatility 12%-43% Credit Default model Quanto correlation 15%-25% (1) Valuation techniques and unobservable inputs for insignificant Level 3 financial assets and liabilities are excluded. (2) The Group has determined that the net asset value represents fair values of certain investment funds. (3) Fair values of certain equity instruments such as unlisted stocks are estimated on the basis of an analysis of the investee’s financial position and results, risk profile, prospects and other factors. A range of key inputs is not provided in these tables as it is not practical to do so given the nature of such valuation techniques. (4) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract. Sensitivity Analysis The fair value of certain financial assets and liabilities is At September 30, 2023 Total fair value Effect recorded in profit or loss Effect recorded directly in equity Favorable Unfavorable Favorable Unfavorable (In millions) Financial instruments—net: Derivative financial instruments—net: Interest rate derivatives—net ¥ (4,036 ) ¥ 7 ¥ 6 ¥ — ¥ — Currency derivatives—net (3,940 ) 5 5 — — Equity derivatives—net 9,370 3,094 3,065 — — Credit derivatives—net 299 18 18 — — Financial assets at fair value through Debt instruments 666,125 257 2,718 — — Equity instruments 84,215 263 688 — — Investment securities at fair value through other comprehensive income: Equity instruments 500,485 — — 17,038 17,038 Financial liabilities designated at fair value through profit or loss (1) (135,950 ) 424 437 — — Others (1)(2) 12,559 51 50 — — At March 31, 2023 Total fair value Effect recorded in profit or loss Effect recorded directly in equity Favorable Unfavorable Favorable Unfavorable (In millions) Financial instruments—net: Derivative financial instruments—net: Interest rate derivatives—net ¥ (3,248 ) ¥ — ¥ — ¥ — ¥ — Currency derivatives—net (4,567 ) 6 6 — — Equity derivatives—net 13,825 2,462 2,467 — — Credit derivatives—net 150 17 17 — — Financial assets at fair value through Debt instruments 650,467 917 4,533 — — Equity instruments 85,201 362 875 — — Investment securities at fair value through other comprehensive income: Equity instruments 464,821 — — 15,368 15,368 Financial liabilities designated at fair value through profit or loss (1) (185,020 ) 1,007 1,109 — — Others (1)(2) 7,852 62 61 — — (1) As part of risk management, the Group enters into transactions to offset the profit or loss of certain financial instruments, including embedded derivatives. Sensitivity of embedded derivatives related to these transactions is presented as derivative financial instruments or financial assets at fair value through profit or loss, according to the presentation of the financial instruments arising from these transactions. (2) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract. Financial Assets and Liabilities Not Carried at Fair Value The table below presents the carrying amounts and fair values of financial assets and liabilities not carried at fair value on the Group’s consolidated statements of financial position at September 30, 2023 and March 31, 2023. It does not include the carrying amounts and fair values of financial assets and liabilities whose carrying amounts are reasonable approximations of fair values. At September 30, 2023 At March 31, 2023 Notes Carrying Fair value Carrying Fair value (In millions) Financial assets: Investment securities: Debt instruments at amortized cost a ¥ 290,051 ¥ 288,504 ¥ 235,567 ¥ 235,541 Loans and advances b 116,285,384 118,381,677 111,891,134 114,154,110 Other financial assets b 8,063,908 8,061,023 5,360,634 5,357,987 Financial liabilities: Deposits: Non-interest-bearing c ¥ 125,399,091 ¥ 125,412,459 ¥ 123,181,105 ¥ 123,009,507 Other deposits c 52,722,107 52,740,173 49,746,705 49,607,234 Borrowings c 15,635,111 15,546,303 14,954,804 14,876,449 Debt securities in issue c 13,725,816 13,631,362 11,984,994 11,828,910 Other financial liabilities c 12,105,474 12,105,317 8,522,212 8,522,110 Notes: a. The fair values of debt instruments at amortized cost are determined using quoted prices in active markets or observable inputs other than quoted prices in active markets. b. (i) The carrying amounts of loans with no specified repayment dates represent a reasonable estimate of fair value, considering the nature of these financial instruments. (ii) Short-term financial assets: The carrying amounts represent a reasonable estimate of fair value. (iii) Long-term financial assets: Except for impaired loans and advances, the fair values are mostly determined using discounted cash flow models taking into account certain factors including counterparties’ credit ratings, pledged collateral, and market interest rates. The fair values of impaired loans and advances are generally determined by discounting the estimated future cash flows over the time period they are expected to be recovered, and may be based on the appraisal value of underlying collateral as appropriate. c. Note that some of the financial liabilities in this category include embedded derivatives, which are separately accounted for, but presented together with the host contract. (i) The carrying amounts of demand deposits and deposits without maturity represent a reasonable estimate of fair value, considering the nature of these financial instruments. (ii) Short-term financial liabilities: The carrying amounts represent a reasonable estimate of fair value. (iii) Long-term financial liabilities: The fair values are, in principle, based on the present values of future cash flows calculated using the funding costs for the remaining maturities. The fair values of debt securities in issue are based on a price quoted by a third party, such as a pricing service or broker, or the present values of future cash flows calculated using the rate derived from yields of bonds issued by SMFG, SMBC and other subsidiaries and publicly offered subordinated bonds published by securities firms. (iv) The carrying amounts and fair values of lease liabilities are not included in this table.

Interest Rate Benchmark Reform

Interest Rate Benchmark Reform	6 Months Ended
	Sep. 30, 2023
Text block [abstract]
Interest Rate Benchmark Reform	19 INTEREST RATE BENCHMARK REFORM As of March 31, 2023, the Group had completed all of the transition from the London Interbank Offered Rate (“LIBOR”) settings which ceased at the end of 2021 to alternative reference rates. The Group continues the transition of financial instruments referencing the USD LIBOR settings which ceased as of June 30, 2023. The following table shows quantitative information about financial instruments that have yet to be referencing the USD LIBOR at September 30, 2023 and March 31, 2023. The amounts in the table below are the aggregation of the amounts used for regulatory reporting of SMFG, SMBC, SMBC’s subsidiaries and SMBC Nikko Securities. They include contracts that will switch to using alternative reference rates at the next reset after September 30, 2023 and March 31, 2023. They also include, to a limited extent, synthetic USD LIBOR contracts that the Group utilized as a temporary solution. At September 30, At March 31, (In billions) Carrying amount of non-derivative ¥ 2,908 ¥ 9,568 Carrying amount of non-derivative 77 1,351 Derivative notional amounts 1,965 247,066

Summary of Material Accountin_2

Summary of Material Accounting Policies (Policies)	6 Months Ended
	Sep. 30, 2023
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Basis of Preparation	Basis of Preparation The interim consolidated financial statements, including selected explanatory notes, of the Group have been prepared in accordance with IAS 34 “Interim Financial Reporting” as issued by the International Accounting Standards Board (“IASB”). The interim consolidated financial statements should be read in conjunction with the Group’s consolidated financial statements for the fiscal year ended March 31, 2023, which have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the IASB.
Material Accounting Policies	Material Accounting Policies The material accounting policies adopted in the preparation of the interim consolidated financial statements are consistent with those followed in the preparation of the Group’s consolidated financial statements for the fiscal year ended March 31, 2023. For the six months ended September 30, 2023, a number of amendments to standards have become effective; however, they have not resulted in any material impact on the Group’s interim consolidated financial statements.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The Group is currently assessing the impact of the following standards, amendments to standards, and interpretations that are not yet effective and have not been early adopted: Sale or Contribution of Assets between an Investor and its Associate or Joint Venture (Amendments to IFRS 10 and IAS 28) In September 2014, the IASB issued the narrow-scope amendments to IFRS 10 “Consolidated Financial Statements” and IAS 28 “Investments in Associates and Joint Ventures” to address an acknowledged inconsistency between the requirements in IFRS 10 and those in IAS 28, in dealing with the sale or contribution of assets between an investor and its associate or joint venture. The effective date of applying the amendments was January 1, 2016 when they were originally issued, however, in December 2015, the IASB issued Effective Date of Amendments to IFRS 10 and IAS 28 Classification of Liabilities as Current or Non-current In January 2020, the IASB issued narrow-scope amendments to IAS 1 “Presentation of Financial Statements” to clarify how to classify debt and other liabilities as current or non-current. non-current. Lease Liability in a Sale and Leaseback (Amendments to IFRS 16) In September 2022, the IASB issued narrow-scope amendments to IFRS 16 “Leases,” which add to subsequent measurement requirements for the lease liability arising from a sale and leaseback transaction. The amendments specify how to measure the lease liability when reporting after the date of the transaction. The amendments are effective for annual reporting periods beginning on or after January 1, 2024 and are not expected to have a material impact on the Group’s consolidated financial statements. Non-current In October 2022, the IASB issued amendments to IAS 1 to improve the information entities provide about long-term debt with covenants. The amendments to IAS 1 specify that covenants to be complied with after the reporting date do not affect the classification of debt as current or non-current Supplier Finance Arrangements (Amendments to IAS 7 and IFRS 7) In May 2023, the IASB issued amendments to IAS 7 “Statement of Cash Flows” and IFRS 7 “Financial Instruments: Disclosures,” which require an entity to provide disclosures to enhance the transparency of supplier finance arrangements and their effects on an entity’s liabilities, cash flows and exposure to liquidity risk. The amendments are effective for annual periods beginning on or after January 1, 2024 and are not expected to have a material impact on the Group’s consolidated financial statements. Lack of Exchangeability (Amendments to IAS 21) In August 2023, the IASB issued the amendments to IAS 21 “The Effects of Changes in Foreign Exchange Rates” to address a matter not previously covered in the accounting requirements for the effects of changes in foreign exchange rates. The amendments require entities to apply a consistent approach in assessing whether a currency can be exchanged into another currency. The amendments also require entities to determine the exchange rate and provide more useful information in their financial statements when a currency cannot be exchanged into another currency. The amendments are effective for annual periods beginning on or after January 1, 2025. The Group is currently evaluating the potential impact that the adoption of the amendments will have on its consolidated financial statements.

Segment Analysis (Tables)

Segment Analysis (Tables)	6 Months Ended
	Sep. 30, 2023
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Segmental Results of Operations	For the six months ended September 30, 2023: Wholesale Business Unit Retail Business Unit Global Business Unit Global Markets Business Unit Head office account and others Total (In billions) Consolidated gross profit (1) ¥ 396.9 ¥ 621.8 ¥ 670.5 ¥ 286.6 ¥ (158.5 ) ¥ 1,817.3 General and administrative expenses (151.9 ) (526.8 ) (391.0 ) (79.9 ) 67.4 (1,082.2 ) Others (2) 53.6 3.4 31.8 15.8 (68.8 ) 35.8 Consolidated net business profit ¥ 298.6 ¥ 98.4 ¥ 311.3 ¥ 222.5 ¥ (159.9 ) ¥ 770.9 For the six months ended September 30, 2022: Wholesale Business Unit Retail Business Unit Global Business Unit Global Markets Business Unit Head office account and others Total (In billions) Consolidated gross profit (1) ¥ 353.4 ¥ 567.9 ¥ 589.5 ¥ 266.7 ¥ (145.1 ) ¥ 1,632.4 General and administrative expenses (143.3 ) (487.7 ) (330.2 ) (73.6 ) 72.2 (962.6 ) Others (2) 48.8 2.1 47.1 15.4 (61.3 ) 52.1 Consolidated net business profit ¥ 258.9 ¥ 82.3 ¥ 306.4 ¥ 208.5 ¥ (134.2 ) ¥ 721.9 (1) Consolidated gross profit = (Interest income – Interest expenses) + Trust fees + (Fee and commission income – Fee and commission expenses) + (Trading income – Trading losses) + (Other operating income – Other operating expenses). (2) “Others” includes share of profit or loss of equity-method associates and joint ventures and cooperated profit and loss, that is, profit and loss double counted within the Group’s business segments in the managerial accounting.
Reconciliation of Segmental Results of Operations to Consolidated Income Statements	Reconciliation of Segmental Results of Operations to Consolidated Income Statements The figures provided in the tables above are calculated by aggregating the figures used for management reporting under Japanese GAAP for each segment. The total amount of consolidated net business profit that is calculated by each segment based on the internal managerial data is reconciled to profit before tax reported in the consolidated financial statements under IFRS as shown in the following table: For the six months ended 2023 2022 (In billions) Consolidated net business profit ¥ 770.9 ¥ 721.9 Differences between management reporting and Japanese GAAP: Total credit costs (100.3 ) (83.1 ) Gains on equity instruments 46.8 92.1 Extraordinary gains or losses and others (11.0 ) (6.2 ) Profit before tax under Japanese GAAP 706.4 724.7 Differences between Japanese GAAP and IFRS: Scope of consolidation 2.7 3.2 Derivative financial instruments 255.8 464.5 Investment securities (49.1 ) (105.6 ) Loans and advances (61.0 ) (33.2 ) Investments in associates and joint ventures 10.1 (28.7 ) Property, plant and equipment 0.4 (0.6 ) Lease accounting (0.9 ) — Defined benefit plans (26.8 ) (28.1 ) Foreign currency translation (16.3 ) (22.5 ) Classification of equity and liability 7.3 5.7 Others 42.4 45.2 Profit before tax under IFRS ¥ 871.0 ¥ 1,024.6

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedge Accounting (Tables)	6 Months Ended
	Sep. 30, 2023
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Derivative Financial Instruments by Type and Purpose of Derivatives	The tables b e At September 30, 2023 Trading Risk Management (1) Notional Assets Liabilities Notional Assets Liabilities (In millions) Interest rate derivatives ¥ 1,705,064,948 ¥ 7,105,501 ¥ 8,935,065 ¥ 63,920,478 ¥ 1,200,112 ¥ 1,355,496 Futures 158,410,820 42,383 44,662 1,562,264 2,253 947 Listed Options 187,933,727 52,836 36,721 — — — Forwards 31,225,313 78,469 72,821 — — — Swaps 1,047,934,282 5,731,168 6,064,799 62,150,298 1,197,859 1,310,443 OTC Options 279,560,806 1,200,645 2,716,062 207,916 — 44,106 Currency derivatives 247,544,947 4,353,447 2,417,493 25,068,889 251,956 2,471,902 Futures 980 — 181 — — — Listed Options — — — — — — Forwards 130,894,081 2,092,679 1,605,454 9,703,233 142,696 469,557 Swaps 106,052,283 2,027,596 538,251 15,365,656 109,260 2,002,345 OTC Options 10,597,603 233,172 273,607 — — — Equity derivatives 3,087,398 52,245 61,296 — — — Futures 1,726,002 23,713 19,235 — — — Listed Options 679,406 11,528 17,067 — — — Forwards 393,964 908 16,791 — — — Swaps 31,119 91 1,382 — — — OTC Options 256,907 16,005 6,821 — — — Commodity derivatives 130,997 13,379 12,178 — — — Futures 52,700 1,932 1,572 — — — Listed Options — — — — — — Forwards — — — — — — Swaps 65,539 11,251 10,168 — — — OTC Options 12,758 196 438 — — — Credit derivatives 3,164,779 38,654 45,285 — — — Total derivative financial instruments ¥ 1,958,993,069 ¥ 11,563,226 ¥ 11,471,317 ¥ 88,989,367 ¥ 1,452,068 ¥ 3,827,398 At March 31, 2023 Trading Risk Management (1) Notional Assets Liabilities Notional Assets Liabilities (In millions) Interest rate derivatives ¥ 1,691,197,124 ¥ 5,025,797 ¥ 6,380,627 ¥ 65,003,591 ¥ 763,819 ¥ 1,032,506 Futures 129,630,431 37,084 36,633 8,746,711 5,990 2,836 Listed Options 262,156,548 87,651 52,918 — — — Forwards 24,354,115 30,619 24,358 — — — Swaps 1,036,174,625 4,059,518 4,100,097 56,071,259 757,829 1,008,337 OTC Options 238,881,405 810,925 2,166,621 185,621 — 21,333 Currency derivatives 220,393,641 2,571,317 1,629,519 21,600,130 203,864 1,376,767 Futures 1,114 145 — — — — Listed Options — — — — — — Forwards 115,616,503 1,113,495 1,107,415 7,430,656 71,072 184,808 Swaps 93,961,952 1,282,512 352,236 14,169,474 132,792 1,191,959 OTC Options 10,814,072 175,165 169,868 — — — Equity derivatives 2,372,833 54,508 42,208 — — — Futures 1,369,369 11,259 16,491 — — — Listed Options 565,733 9,312 17,713 — — — Forwards 146,369 12,567 2 — — — Swaps 39,235 433 2,554 — — — OTC Options 252,127 20,937 5,448 — — — Commodity derivatives 129,488 9,142 7,946 — — — Futures 25,427 407 1,247 — — — Listed Options — — — — — — Forwards — — — — — — Swaps 73,010 8,567 6,331 — — — OTC Options 31,051 168 368 — — — Credit derivatives 2,893,477 21,500 27,282 — — — Total derivative financial instruments ¥ 1,916,986,563 ¥ 7,682,264 ¥ 8,087,582 ¥ 86,603,721 ¥ 967,683 ¥ 2,409,273 (1) Derivative financial instruments categorized as “Risk Management” are used for economic hedging, such as managing the exposure to changes in fair value of the loan portfolio, and are identified as hedging instruments under Japanese GAAP. Under IFRS, the Group applies hedge accounting for certain fixed rate debt securities in issue, borrowings, and debt instruments at fair value through other comprehensive income (“FVOCI”) and net investments in foreign operations. Derivative financial instruments designated as hedging instruments are also categorized as “Risk Management.”
Schedule of Items Designated as Hedging Instruments	The Group app l e At September 30, 2023 At March 31, 2023 Notional Carrying amounts Notional Carrying amounts Assets Liabilities Assets Liabilities (In millions) Interest rate risk Interest rate swaps ¥ 9,854,304 ¥ 139,607 ¥ 875,688 ¥ 8,264,813 ¥ 101,835 ¥ 587,049 Interest rate options 207,916 — 44,106 185,621 — 21,333
Schedule of Hedges of Net Investments in Foreign Operations	The table below represents the amounts related to items designated as hedging instruments at September 30, 2023 and March 31, 2023. At September 30, 2023 At March 31, 2023 Nominal Carrying amounts Nominal Carrying amounts Assets Liabilities Assets Liabilities (In millions) Foreign exchange forward contracts ¥ 3,430,339 ¥ 32,887 ¥ 465,816 ¥ 3,088,524 ¥ 48,483 ¥ 147,366 Foreign currency denominated financial liabilities 322,840 — 322,840 287,072 — 287,072

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Sep. 30, 2023
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Summary of Investment Securities	The following table shows the amount of investment securities, which consist of debt instruments at amortized cost, debt instruments at fair value through other comprehensive income and equity instruments at fair value through other comprehensive income at September 30, 2023 and March 31, 2023. At September 30, At March 31, (In millions) Debt instruments at amortized cost: Domestic: Japanese government bonds ¥ 78,556 ¥ 72,549 Japanese municipal bonds 128,649 93,044 Japanese corporate bonds 4,990 — Total domestic 212,195 165,593 Foreign: Bonds issued by other governments and official institutions (1) 72,689 68,121 Mortgage-backed securities 1,926 — Other debt instruments 3,241 1,853 Total foreign 77,856 69,974 Total debt instruments at amortized cost ¥ 290,051 ¥ 235,567 Debt instruments at fair value through other comprehensive income: Domestic: Japanese government bonds ¥ 9,512,127 ¥ 9,576,298 Japanese municipal bonds 1,077,443 1,087,625 Japanese corporate bonds 910,839 946,726 Other debt instruments 313 312 Total domestic 11,500,722 11,610,961 Foreign: U.S. Treasury and other U.S. government agency bonds 9,825,401 5,232,456 Bonds issued by other governments and official institutions (1) 3,416,633 2,991,272 Mortgage-backed securities 3,151,857 2,379,250 Other debt instruments 651,193 597,484 Total foreign 17,045,084 11,200,462 Total debt instruments at fair value through other comprehensive income ¥ 28,545,806 ¥ 22,811,423 Equity instruments at fair value through other comprehensive income: Domestic equity instruments ¥ 4,071,827 ¥ 3,587,964 Foreign equity instruments 1,175,046 960,644 Total equity instruments at fair value through other comprehensive income ¥ 5,246,873 ¥ 4,548,608 Total investment securities ¥ 34,082,730 ¥ 27,595,598 (1) Bonds issued by governments and official institutions excluding U.S. Treasury and other U.S. government agencies.

Loans and Advances (Tables)

Loans and Advances (Tables)	6 Months Ended
	Sep. 30, 2023
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Summary of Loans and Advances	The following tables present loans and advances at September 30, 2023 and March 31, 2023. At September 30, 2023 12-month Lifetime ECL Lifetime ECL credit-impaired Total (In millions) Loans and advances at amortized cost: Gross loans and advances ¥ 112,702,852 ¥ 3,770,596 ¥ 1,207,957 ¥ 117,681,405 Adjust: Unearned income, unamortized premiums—net and deferred loan fees—net (446,390 ) Less: Allowance for loan losses (206,054 ) (257,488 ) (486,089 ) (949,631 ) Carrying amount ¥ 116,285,384 At March 31, 2023 12-month Lifetime ECL Lifetime ECL Total (In millions) Loans and advances at amortized cost: Gross loans and advances ¥ 108,254,496 ¥ 3,718,669 ¥ 1,170,662 ¥ 113,143,827 Adjust: Unearned income, unamortized premiums—net and deferred loan fees—net (388,579 ) Less: Allowance for loan losses (187,455 ) (240,494 ) (436,165 ) (864,114 ) Carrying amount ¥ 111,891,134
Reconciliation of Allowance for Loan Losses	Reconciliation of allowance for loan losses is as follows: At September 30, 2023 12-month ECL Lifetime ECL Lifetime ECL credit-impaired Total (In millions) Allowance for loan losses: Balance at April 1, 2023 ¥ 187,455 ¥ 240,494 ¥ 436,165 ¥ 864,114 Net transfers between stages (1,301 ) (9,373 ) 10,674 — Provision for loan losses 12,665 18,250 99,068 129,983 Charge-offs (1) — — 91,512 91,512 Recoveries — — 8,049 8,049 Net charge-offs — — 83,463 83,463 Others (2) 7,235 8,117 23,645 38,997 Balance at September 30, 2023 ¥ 206,054 ¥ 257,488 ¥ 486,089 ¥ 949,631 At September 30, 2022 12-month Lifetime ECL Lifetime ECL Total (In millions) Allowance for loan losses: Balance at April 1, 2022 ¥ 162,919 ¥ 247,020 ¥ 583,115 ¥ 993,054 Net transfers between stages (7,616 ) (8,529 ) 16,145 — Provision for loan losses 12,104 5,737 69,148 86,989 Charge-offs (1) — — 142,198 142,198 Recoveries — — 10,467 10,467 Net charge-offs — — 131,731 131,731 Others (2) 7,882 14,052 19,922 41,856 Balance at September 30, 2022 ¥ 175,289 ¥ 258,280 ¥ 556,599 ¥ 990,168 (1) Charge-offs consist of the reduction of the allowance through the sales of loans and write-offs. (2) Others mainly include foreign exchange translations for the six months ended September 30, 2023 and 2022.
Summary of Key Factor of the Macroeconomic Scenarios	The following table shows the growth rates of the Japanese and global GDP, which are the key factors of the macroeconomic scenarios, under the base scenario. For the fiscal year ending March 31, 2024 2025 (%) Japanese GDP 6.2 2.6 Global GDP 3.0 3.1

Borrowings (Tables)

Borrowings (Tables)	6 Months Ended
	Sep. 30, 2023
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Short-term Borrowings and Long-term Borrowings (with Original Maturities of More Than One Year)	Borrowings at September 30, 2023 and March 31, 2023 consisted of the following: At September 30, At March 31, (In millions) Unsubordinated borrowings ¥ 14,247,306 ¥ 13,532,217 Subordinated borrowings 177,412 186,218 Liabilities associated with securitization transactions 1,210,393 1,236,369 Lease liabilities 425,079 416,997 Total borrowings ¥ 16,060,190 ¥ 15,371,801

Debt Securities in Issue (Table

Debt Securities in Issue (Tables)	6 Months Ended
	Sep. 30, 2023
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Summary of Debt Securities in Issue	Debt securities in issue at September 30, 2023 and March 31, 2023 consisted of the following: At September 30, At March 31, (In millions) Commercial paper ¥ 2,874,209 ¥ 2,585,889 Unsubordinated bonds 9,572,275 8,285,355 Subordinated bonds 1,279,332 1,113,750 Total debt securities in issue ¥ 13,725,816 ¥ 11,984,994

Provisions (Tables)

Provisions (Tables)	6 Months Ended
	Sep. 30, 2023
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Movements by Class of Provisions	The following table presents movements by class of provisions for the six months ended September 30, 2023. Provision for Other provisions Total (In millions) Balance at April 1, 2023 ¥ 128,234 ¥ 119,110 ¥ 247,344 Additional provisions — 4,386 4,386 Amounts used (16,110 ) (4,231 ) (20,341 ) Unused amounts reversed — (5,903 ) (5,903 ) Amortization of discount and effect of change in discount rate (516 ) 78 (438 ) Others — 348 348 Balance at September 30, 2023 ¥ 111,608 ¥ 113,788 ¥ 225,396

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Sep. 30, 2023
Common stock [Member]
Statement [Line Items]
Number of Shares	The number of issued shares of common stock and common stock held by the Company at September 30, 2023 and March 31, 2023 was as follows: At September 30, At March 31, Shares outstanding 1,337,529,084 1,374,691,194 Shares in treasury 3,455,590 30,070,650
Preferred stock [Member]
Statement [Line Items]
Number of Shares	Preferred Stock The following table shows the number of shares of preferred stock at September 30, 2023 and March 31, 2023. At September 30, 2023 At March 31, 2023 Authorized Issued Authorized Issued Type 5 preferred stock 167,000 — 167,000 — Type 7 preferred stock 167,000 — 167,000 — Type 8 preferred stock 115,000 — 115,000 — Type 9 preferred stock 115,000 — 115,000 —

Equity Attributable To Other _2

Equity Attributable To Other Equity Instruments Holders (Tables)	6 Months Ended
	Sep. 30, 2023
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Equity Attributable to Other Equity Instruments Holders	Equity attributable to other equity instruments holders at September 30, 2023 and March 31, 2023 consisted of the following: At September 30, At March 31, (In millions) Perpetual subordinated bonds ¥ 1,106,695 ¥ 755,802 Perpetual subordinated borrowings ¥ 20,000 ¥ 10,000 Total equity attributable to other equity instruments holders ¥ 1,126,695 ¥ 765,802

Fee and Commission Income (Tabl

Fee and Commission Income (Tables)	6 Months Ended
	Sep. 30, 2023
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Summary of Fee and Commission Income	Fee and commission income for the six months ended September 30, 2023 and 2022 consisted of the following: For the six months ended 2023 2022 (In millions) Loans ¥ 71,500 ¥ 68,340 Credit card business 207,529 181,965 Guarantees 41,245 35,386 Securities-related business 88,549 55,537 Deposits 9,016 8,560 Remittances and transfers 74,658 73,526 Safe deposits 2,195 2,051 Trust fees 3,785 3,044 Investment trusts 82,543 74,220 Agency 4,746 4,630 Others 104,949 100,287 Total fee and commission income ¥ 690,715 ¥ 607,546

Impairment Charges on Financi_2

Impairment Charges on Financial Assets (Tables)	6 Months Ended
	Sep. 30, 2023
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Summary of Impairment Charges on Financial Assets	Impairment charges (reversals) on financial assets for the six months ended September 30, 2023 and 2022 consisted of the following: For the six months ended September 30, 2023 2022 (In millions) Loans and advances ¥ 129,983 ¥ 86,989 Loan commitments (5,132 ) (7,429 ) Financial guarantees 5,402 8,465 Total impairment charges on financial assets ¥ 130,253 ¥ 88,025

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Sep. 30, 2023
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Summary of Earnings Per Share	The following table shows the income and share data used in the basic and diluted earnings per share calculations for the six months ended September 30, 2023 and 2022. For the six months ended September 30, 2023 2022 (In millions, except number of shares and per share data) Basic: Profit attributable to shareholders of the Company ¥ 651,127 ¥ 762,185 Weighted average number of common stock in issue (in thousands of shares) 1,334,846 1,371,054 Basic earnings per share ¥ 487.79 ¥ 555.91 Diluted: Profit attributable to the common shareholders of the Company ¥ 651,127 ¥ 762,185 Impact of dilutive potential ordinary shares issued by subsidiaries and associates (2 ) — Net profit used to determine diluted earnings per share ¥ 651,125 ¥ 762,185 Weighted average number of common stock in issue (in thousands of shares) 1,334,846 1,371,054 Adjustments for stock options (in thousands of shares) 397 478 Weighted average number of common stock for diluted earnings per share (in thousands of shares) 1,335,243 1,371,532 Diluted earnings per share ¥ 487.65 ¥ 555.72

Dividends Per Share (Tables)

Dividends Per Share (Tables)	6 Months Ended
	Sep. 30, 2023
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Summary of Dividends Per Share	The dividends recognized by the Company for the six months ended September 30, 2023 and 2022 were as follows: Per share Aggregate amount (In yen) (In millions) Dividends on common stock for the six months ended September 30, 2023 ¥ 125 ¥ 168,078 2022 ¥ 105 ¥ 143,936

Contingency and Capital Commi_2

Contingency and Capital Commitments (Tables)	6 Months Ended
	Sep. 30, 2023
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Nominal Amounts of Undrawn Loan Commitments and Financial Guarantees and Other Credit-Related Contingent Liabilities	The table below shows the nominal amounts of undrawn loan commitments, and financial guarantees and other credit-related contingent liabilities at September 30, 2023 and March 31, 2023. At September 30, 2023 At March 31, 2023 (In millions) Loan commitments ¥ 85,878,811 ¥ 79,068,816 Financial guarantees and other credit-related contingent liabilities 14,605,432 13,693,772 Total ¥ 100,484,243 ¥ 92,762,588

Fair Value of Financial Asset_2

Fair Value of Financial Assets and Liabilities (Tables)	6 Months Ended
	Sep. 30, 2023
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Carrying Amounts of Financial Assets and Liabilities Carried at Fair Value	The following tables present the carrying amounts of financial assets and liabilities carried at fair value based on the three levels of the fair value hierarchy at September 30, 2023 and March 31, 2023. At September 30, 2023 Level 1 (1) Level 2 (1) Level 3 Total (In millions) Financial assets: Trading assets: Debt instruments ¥ 4,004,541 ¥ 944,694 ¥ — ¥ 4,949,235 Equity instruments 361,105 658 — 361,763 Total trading assets 4,365,646 945,352 — 5,310,998 Derivative financial instruments: Interest rate derivatives 97,472 8,208,059 82 8,305,613 Currency derivatives — 4,604,469 934 4,605,403 Equity derivatives 35,241 408 16,596 52,245 Commodity derivatives 1,932 11,447 — 13,379 Credit derivatives — 38,244 410 38,654 Total derivative financial instruments 134,645 12,862,627 18,022 13,015,294 Financial assets at fair value through profit or loss: Debt instruments 506,426 641,478 666,125 1,814,029 Equity instruments 1,934 284 84,215 86,433 Total financial assets at fair value through profit or loss 508,360 641,762 750,340 1,900,462 Investment securities at fair value through other comprehensive income: Japanese government bonds 9,512,127 — — 9,512,127 U.S. Treasury and other U.S. government agency bonds 9,825,401 — — 9,825,401 Other debt instruments 1,387,551 7,820,727 — 9,208,278 Total debt instruments 20,725,079 7,820,727 — 28,545,806 Equity instruments 4,744,887 1,501 500,485 5,246,873 Total investment securities at fair value through other comprehensive income 25,469,966 7,822,228 500,485 33,792,679 Total ¥ 30,478,617 ¥ 22,271,969 ¥ 1,268,847 ¥ 54,019,433 Financial liabilities: Trading liabilities: Debt instruments ¥ 3,574,685 ¥ 217,374 ¥ — ¥ 3,792,059 Equity instruments 389,454 5,639 — 395,093 Total trading liabilities 3,964,139 223,013 — 4,187,152 Derivative financial instruments: Interest rate derivatives 82,330 10,204,113 4,118 10,290,561 Currency derivatives 181 4,884,340 4,874 4,889,395 Equity derivatives 36,302 17,768 7,226 61,296 Commodity derivatives 1,572 10,606 — 12,178 Credit derivatives — 45,174 111 45,285 Total derivative financial instruments 120,385 15,162,001 16,329 15,298,715 Financial liabilities designated at fair value through profit or loss — 285,442 135,950 421,392 Others (2) — (6,728 ) (12,559 ) (19,287 ) Total ¥ 4,084,524 ¥ 15,663,728 ¥ 139,720 ¥ 19,887,972 At March Level 1 (1) Level 2 (1) Level 3 Total (In millions) Financial assets: Trading assets: Debt instruments ¥ 3,732,551 ¥ 497,294 ¥ — ¥ 4,229,845 Equity instruments 340,365 15,705 — 356,070 Total trading assets 4,072,916 512,999 — 4,585,915 Derivative financial instruments: Interest rate derivatives 130,725 5,658,891 — 5,789,616 Currency derivatives 145 2,774,537 499 2,775,181 Equity derivatives 20,571 13,002 20,935 54,508 Commodity derivatives 407 8,735 — 9,142 Credit derivatives — 21,142 358 21,500 Total derivative financial instruments 151,848 8,476,307 21,792 8,649,947 Financial assets at fair value through profit or loss: Debt instruments 343,539 398,883 650,467 1,392,889 Equity instruments 2,829 7,320 85,201 95,350 Total financial assets at fair value through profit or loss 346,368 406,203 735,668 1,488,239 Investment securities at fair value through other comprehensive income: Japanese government bonds 9,576,298 — — 9,576,298 U.S. Treasury and other U.S. government agency bonds 5,232,456 — — 5,232,456 Other debt instruments 1,503,857 6,498,812 — 8,002,669 Total debt instruments 16,312,611 6,498,812 — 22,811,423 Equity instruments 4,076,610 7,177 464,821 4,548,608 Total investment securities at fair value through other comprehensive income 20,389,221 6,505,989 464,821 27,360,031 Total ¥ 24,960,353 ¥ 15,901,498 ¥ 1,222,281 ¥ 42,084,132 Financial liabilities: Trading liabilities: Debt instruments ¥ 3,017,272 ¥ 84,161 ¥ — ¥ 3,101,433 Equity instruments 183,935 5,721 — 189,656 Total trading liabilities 3,201,207 89,882 — 3,291,089 Derivative financial instruments: Interest rate derivatives 92,387 7,317,498 3,248 7,413,133 Currency derivatives — 3,001,220 5,066 3,006,286 Equity derivatives 34,204 894 7,110 42,208 Commodity derivatives 1,247 6,699 — 7,946 Credit derivatives — 27,074 208 27,282 Total derivative financial instruments 127,838 10,353,385 15,632 10,496,855 Financial liabilities designated at fair value through profit or loss — 229,086 185,020 414,106 Others (2) — (4,086 ) (7,852 ) (11,938 ) Total ¥ 3,329,045 ¥ 10,668,267 ¥ 192,800 ¥ 14,190,112 (1) Transfers between levels of the fair value hierarchy are deemed to have occurred at the beginning of the period. There were no significant transfers between Level 1 and Level 2 for the six months ended September 30, 2023 and for the fiscal year ended March 31, 2023. (2) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract. The separated embedded derivatives are measured at fair value using the valuation techniques described in “Derivative financial instruments (including embedded derivatives)” in Note 44 “Fair Value of Financial Assets and Liabilities” of the Group’s consolidated financial statements for the fiscal year ended March 31, 2023.
Reconciliations for Financial Assets and Liabilities Carried at Fair Value	The following tables present reconciliations from the beginning to the ending balances for financial assets and liabilities carried at fair value and categorized within Level 3 of the fair value hierarchy for the six months ended September 30, 2023 and 2022. Total gains (losses) Changes in related to assets At April 1, Included in Included in Purchases Sales Issuances Settlements (1) Transfers (2) Transfers (2) At (In millions) Derivative financial instruments—net: Interest rate derivatives—net ¥ (3,248 ) ¥ (2,329 ) ¥ — ¥ 1,541 ¥ — ¥ — ¥ — ¥ — ¥ — ¥ (4,036 ) ¥ (1,031 ) Currency derivatives—net (4,567 ) 663 — 74 (110 ) — — — — (3,940 ) 580 Equity derivatives—net 13,825 (1,867 ) — 2,123 (4,711 ) — — — — 9,370 2,067 Credit derivatives—net 150 149 — — — — — — — 299 148 Total derivative financial instruments—net 6,160 (3,384 ) — 3,738 (4,821 ) — — — — 1,693 1,764 Financial assets at fair value through profit or loss: Debt instruments 650,467 32,792 305 54,432 (38,883 ) — (29,456 ) — (3,532 ) 666,125 32,586 Equity instruments 85,201 (892 ) — 5,770 (792 ) — (4,315 ) — (757 ) 84,215 (1,473 ) Total financial assets at fair value through profit or loss 735,668 31,900 305 60,202 (39,675 ) — (33,771 ) — (4,289 ) 750,340 31,113 Investment securities at fair value through other comprehensive income: Equity instruments 464,821 — 37,478 806 (2,120 ) — (117 ) — (383 ) 500,485 — Total investment securities at fair value through other comprehensive income 464,821 — 37,478 806 (2,120 ) — (117 ) — (383 ) 500,485 — Financial liabilities designated at fair value through profit or loss (185,020 ) (10,861 ) (957 ) — — (14,957 ) 75,845 — — (135,950 ) 516 Others (3) 7,852 5,049 — — — — — — (342 ) 12,559 5,017 Total ¥ 1,029,481 ¥ 22,704 ¥ 36,826 ¥ 64,746 ¥ (46,616) ¥ (14,957) ¥ 41,957 ¥ — ¥ (5,014 ) ¥ 1,129,127 ¥ 38,410 Total gains (losses) Changes in related to assets At April 1, Included in Included in Purchases Sales Issuances Settlements (1) Transfers (2) Transfers (2) At (In millions) Derivative financial instruments—net: Interest rate derivatives—net ¥ (7,162 ) ¥ (3,439 ) ¥ — ¥ 8 ¥ — ¥ — ¥ — ¥ — ¥ — ¥ (10,593 ) ¥ (3,409 ) Currency derivatives—net 1,652 (1,445 ) — — — — — — (5,522 ) (5,315 ) (2,099 ) Equity derivatives—net 15,384 3,709 — 2,609 (5,104 ) — — — — 16,598 6,924 Credit derivatives—net 521 (500 ) — — — — — — — 21 (494 ) Total derivative financial instruments—net 10,395 (1,675 ) — 2,617 (5,104 ) — — — (5,522 ) 711 922 Financial assets at fair value through profit or loss: Debt instruments 693,013 25,736 398 68,177 (40,242 ) — (33,344 ) — (80,259 ) 633,479 26,808 Equity instruments 35,884 76 — 4,403 (161 ) — (633 ) — (459 ) 39,110 (48 ) Total financial assets at fair value through profit or loss 728,897 25,812 398 72,580 (40,403 ) — (33,977 ) — (80,718 ) 672,589 26,760 Investment securities at fair value through other comprehensive income: Equity instruments 468,713 — (6,391 ) 2,175 (3,972 ) — (64 ) — — 460,461 — Total investment securities at fair value through other comprehensive income 468,713 — (6,391 ) 2,175 (3,972 ) — (64 ) — — 460,461 — Financial liabilities designated at fair value through profit or loss (291,086 ) 41,262 220 — — (44,886 ) 65,889 — — (228,601 ) 57,436 Others (3) 3,052 7,567 — 940 — — — — (1,363 ) 10,196 8,185 Total ¥ 919,971 ¥ 72,966 ¥ (5,773 ) ¥ 78,312 ¥ (49,479) ¥ (44,886 ) ¥ 31,848 ¥ — ¥ (87,603 ) ¥ 915,356 ¥ 93,303 (1) Settlements for equity instruments include redemption of preferred stocks and receipt of cash distributions which represent a return of investment. (2) Transfers between levels of the fair value hierarchy are deemed to have occurred at the beginning of the period. For the six months ended September 30, 2023 and 2022, transfers out of Level 3 amounted to ¥ million and ¥ million, respectively. Those transfers out of Level 3 were primarily due to a decrease of significance of unobservable inputs of certain financial assets at fair value through profit or loss, including certain investment funds. (3) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract.
Total and Changes in Unrealized Gains or Losses Included in Profit or Loss for Level 3 Financial Assets and Liabilities	The following table presents total gains or losses included in profit or loss for the Level 3 financial assets and liabilities, and changes in unrealized gains or losses included in profit or loss related to those financial assets and liabilities held at September 30, 2023 and 2022 by line item of the consolidated income statements. Total gains (losses) included in Changes in unrealized gains 2023 2022 2023 2022 (In millions) Net interest income ¥ 559 ¥ 861 ¥ 525 ¥ 576 Net trading income 1,106 5,120 6,256 8,531 Net income from financial assets and liabilities at fair value through profit or loss 21,039 67,074 31,629 84,196 Other expenses — 89 — — Total ¥ 22,704 ¥ 72,966 ¥ 38,410 ¥ 93,303
Summary of Aggregate Deferred Day One Profit Yet to Be Recognized in Profit	The aggregate deferred day one profit yet to be recognized in profit or loss at the beginning and end of the six months ended September 30, 2023 and 2022, and reconciliation of changes in the balances were as follows: For the six months ended September 30, 2023 2022 (In millions) Balance at beginning of period ¥ 22,276 ¥ 27,100 Increase due to new trades 1,861 7,061 Reduction due to redemption, sales or passage of time (10,649 ) (16,017 ) Balance at end of period ¥ 13,488 ¥ 18,144
Quantitative Information about Significant Unobservable Inputs Used in the Fair Value Measurement for Level 3 Financial Assets and Liabilities	The following tables present quantitative information about significant unobservable inputs used in the fair value measurement for Level 3 financial assets and liabilities at September 30, 2023 and March 31, 2023. At September 30, 2023 Assets Liabilities Valuation technique(s) (1) Significant unobservable inputs (1) Range of (1) (In millions) Derivative financial instruments: Interest rate derivatives ¥ 82 ¥ 4,118 Option model Interest rate to interest rate correlation 31%-99% Quanto correlation (5% ) Interest rate volatility 3%-8% Currency derivatives 934 4,874 Option model Interest rate to interest rate correlation 26%-99% Quanto correlation 5%-49% Foreign exchange volatility 8%-15% Equity derivatives 16,596 7,226 Option model Equity to equity correlation 45%-91% Quanto correlation (29% ) Equity volatility 16%-57% Credit derivatives 410 111 Credit Default model Quanto correlation 18%-28% Financial assets at fair value through profit or loss: Debt instruments 666,125 — Option model Foreign exchange volatility 12%-42% DCF model Probability of default rate 0%-32% Loss given default rate 0%-100% Discount margin 5%-9% Net asset value (2) — — Equity instruments 84,215 — Market multiples Price/Book value multiple 0.7x Liquidity discount 20% DCF model Probability of default rate 0%-1% Loss given default rate 90% See note (3) below — — Investment securities at fair value through other comprehensive Equity instruments 500,485 — Market multiples Price/Book value multiple 0.3x-3.5x Liquidity discount 20% See note (3) below — — Financial liabilities designated at fair value through profit or — 135,950 Option model Equity to equity correlation 43%-89% Interest rate to interest rate correlation 26%-27% Quanto correlation (29% ) Equity volatility 18%-45% Credit Default model Quanto correlation 18%-28% Others (4) — (12,559 ) Option model Interest rate to interest rate correlation 26%-99% Quanto correlation (5% ) Equity volatility 27%-28% Foreign exchange volatility 10%-42% Credit Default model Quanto correlation 18%-28% At March 31, 2023 Assets Liabilities Valuation technique(s) (1) Significant unobservable inputs (1) Range of (1) (In millions) Derivative financial instruments: Interest rate derivatives ¥ — ¥ 3,248 Option model Interest rate to interest rate correlation 26%-99% Quanto correlation (11%)-42% Currency derivatives 499 5,066 Option model Interest rate to interest rate correlation 29%-99% Quanto correlation 8%-50% Foreign exchange volatility 12%-36% Equity derivatives 20,935 7,110 Option model Equity to equity correlation 48%-92% Quanto correlation (13%)-38% Equity volatility 12%-70% Credit derivatives 358 208 Credit Default model Quanto correlation 15%-25% Financial assets at fair value through profit or loss: Debt instruments 650,467 — Option model Foreign exchange volatility 13%-43% DCF model Probability of default rate 0%-33% Loss given default rate 0%-100% Discount margin 5%-9% Net asset value (2) — — Equity instruments 85,201 — Market multiples Price/Book value multiple 1.1x DCF model Probability of default rate 0%-1% Loss given default rate 90% See note (3) below — — Investment securities at fair value through other comprehensive income: Equity instruments 464,821 — Market multiples Price/Book value multiple 0.2x-3.7x Liquidity discount 20% See note (3) below — — Financial liabilities designated at fair value through profit or loss — 185,020 Option model Equity to equity correlation 47%-93% Interest rate to interest rate correlation 29%-30% Quanto correlation (13%)-50% Equity volatility 17%-52% Credit Default model Quanto correlation 15%-25% Others (4) — (7,852 ) Option model Equity to equity correlation 80%-83% Interest rate to interest rate correlation 26%-99% Quanto correlation (11%)-50% Equity volatility 24%-28% Foreign exchange volatility 12%-43% Credit Default model Quanto correlation 15%-25% (1) Valuation techniques and unobservable inputs for insignificant Level 3 financial assets and liabilities are excluded. (2) The Group has determined that the net asset value represents fair values of certain investment funds. (3) Fair values of certain equity instruments such as unlisted stocks are estimated on the basis of an analysis of the investee’s financial position and results, risk profile, prospects and other factors. A range of key inputs is not provided in these tables as it is not practical to do so given the nature of such valuation techniques. (4) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract.
Impact of Valuation Sensitivity	The following tables present the impact of the valuation sensitivity, if these inputs fluctuate to the extent deemed reasonable and the volatility of such inputs has a significant impact on the fair value. At September 30, 2023 Total fair value Effect recorded in profit or loss Effect recorded directly in equity Favorable Unfavorable Favorable Unfavorable (In millions) Financial instruments—net: Derivative financial instruments—net: Interest rate derivatives—net ¥ (4,036 ) ¥ 7 ¥ 6 ¥ — ¥ — Currency derivatives—net (3,940 ) 5 5 — — Equity derivatives—net 9,370 3,094 3,065 — — Credit derivatives—net 299 18 18 — — Financial assets at fair value through Debt instruments 666,125 257 2,718 — — Equity instruments 84,215 263 688 — — Investment securities at fair value through other comprehensive income: Equity instruments 500,485 — — 17,038 17,038 Financial liabilities designated at fair value through profit or loss (1) (135,950 ) 424 437 — — Others (1)(2) 12,559 51 50 — — At March 31, 2023 Total fair value Effect recorded in profit or loss Effect recorded directly in equity Favorable Unfavorable Favorable Unfavorable (In millions) Financial instruments—net: Derivative financial instruments—net: Interest rate derivatives—net ¥ (3,248 ) ¥ — ¥ — ¥ — ¥ — Currency derivatives—net (4,567 ) 6 6 — — Equity derivatives—net 13,825 2,462 2,467 — — Credit derivatives—net 150 17 17 — — Financial assets at fair value through Debt instruments 650,467 917 4,533 — — Equity instruments 85,201 362 875 — — Investment securities at fair value through other comprehensive income: Equity instruments 464,821 — — 15,368 15,368 Financial liabilities designated at fair value through profit or loss (1) (185,020 ) 1,007 1,109 — — Others (1)(2) 7,852 62 61 — — (1) As part of risk management, the Group enters into transactions to offset the profit or loss of certain financial instruments, including embedded derivatives. Sensitivity of embedded derivatives related to these transactions is presented as derivative financial instruments or financial assets at fair value through profit or loss, according to the presentation of the financial instruments arising from these transactions. (2) Derivatives embedded in financial liabilities, except for financial liabilities designated at fair value through profit or loss, are separately accounted for, but presented together with the host contract in the consolidated statements of financial position. In these tables, the separated embedded derivatives whose host contracts are carried at amortized cost are presented within others. Although the separated embedded derivatives may have a positive or a negative fair value, they have been presented in these tables as liabilities to be consistent with the host contract.
Financial Assets and Liabilities Not Carried at Fair Value	The table below presents the carrying amounts and fair values of financial assets and liabilities not carried at fair value on the Group’s consolidated statements of financial position at September 30, 2023 and March 31, 2023. It does not include the carrying amounts and fair values of financial assets and liabilities whose carrying amounts are reasonable approximations of fair values. At September 30, 2023 At March 31, 2023 Notes Carrying Fair value Carrying Fair value (In millions) Financial assets: Investment securities: Debt instruments at amortized cost a ¥ 290,051 ¥ 288,504 ¥ 235,567 ¥ 235,541 Loans and advances b 116,285,384 118,381,677 111,891,134 114,154,110 Other financial assets b 8,063,908 8,061,023 5,360,634 5,357,987 Financial liabilities: Deposits: Non-interest-bearing c ¥ 125,399,091 ¥ 125,412,459 ¥ 123,181,105 ¥ 123,009,507 Other deposits c 52,722,107 52,740,173 49,746,705 49,607,234 Borrowings c 15,635,111 15,546,303 14,954,804 14,876,449 Debt securities in issue c 13,725,816 13,631,362 11,984,994 11,828,910 Other financial liabilities c 12,105,474 12,105,317 8,522,212 8,522,110 Notes: a. The fair values of debt instruments at amortized cost are determined using quoted prices in active markets or observable inputs other than quoted prices in active markets. b. (i) The carrying amounts of loans with no specified repayment dates represent a reasonable estimate of fair value, considering the nature of these financial instruments. (ii) Short-term financial assets: The carrying amounts represent a reasonable estimate of fair value. (iii) Long-term financial assets: Except for impaired loans and advances, the fair values are mostly determined using discounted cash flow models taking into account certain factors including counterparties’ credit ratings, pledged collateral, and market interest rates. The fair values of impaired loans and advances are generally determined by discounting the estimated future cash flows over the time period they are expected to be recovered, and may be based on the appraisal value of underlying collateral as appropriate. c. Note that some of the financial liabilities in this category include embedded derivatives, which are separately accounted for, but presented together with the host contract. (i) The carrying amounts of demand deposits and deposits without maturity represent a reasonable estimate of fair value, considering the nature of these financial instruments. (ii) Short-term financial liabilities: The carrying amounts represent a reasonable estimate of fair value. (iii) Long-term financial liabilities: The fair values are, in principle, based on the present values of future cash flows calculated using the funding costs for the remaining maturities. The fair values of debt securities in issue are based on a price quoted by a third party, such as a pricing service or broker, or the present values of future cash flows calculated using the rate derived from yields of bonds issued by SMFG, SMBC and other subsidiaries and publicly offered subordinated bonds published by securities firms. (iv) The carrying amounts and fair values of lease liabilities are not included in this table.

Interest Rate Benchmark Reform

Interest Rate Benchmark Reform (Tables)	6 Months Ended
	Sep. 30, 2023
Text block [abstract]
Summary Of Financial Instruments Referencing The USD LIBOR	The following table shows quantitative information about financial instruments that have yet to be referencing the USD LIBOR at September 30, 2023 and March 31, 2023. At September 30, At March 31, (In billions) Carrying amount of non-derivative ¥ 2,908 ¥ 9,568 Carrying amount of non-derivative 77 1,351 Derivative notional amounts 1,965 247,066

Segment Analysis - Additional I

Segment Analysis - Additional Information (Detail)	6 Months Ended
	Sep. 30, 2023 Segments
Disclosure of operating segments [abstract]
Number of main business segments	4

Segment Analysis - Segmental Re

Segment Analysis - Segmental Results of Operations (Detail) - JPY (¥) ¥ in Billions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disclosure of operating segments [line items]
Consolidated gross profit	¥ 1,817.3	¥ 1,632.4
General and administrative expenses	(1,082.2)	(962.6)
Others	35.8	52.1
Consolidated net business profit	770.9	721.9
Operating segments [member] | Wholesale Business Unit [member]
Disclosure of operating segments [line items]
Consolidated gross profit	396.9	353.4
General and administrative expenses	(151.9)	(143.3)
Others	53.6	48.8
Consolidated net business profit	298.6	258.9
Operating segments [member] | Retail Business Unit [member]
Disclosure of operating segments [line items]
Consolidated gross profit	621.8	567.9
General and administrative expenses	(526.8)	(487.7)
Others	3.4	2.1
Consolidated net business profit	98.4	82.3
Operating segments [member] | Global Business Unit [member]
Disclosure of operating segments [line items]
Consolidated gross profit	670.5	589.5
General and administrative expenses	(391)	(330.2)
Others	31.8	47.1
Consolidated net business profit	311.3	306.4
Operating segments [member] | Global Markets Business Unit [member]
Disclosure of operating segments [line items]
Consolidated gross profit	286.6	266.7
General and administrative expenses	(79.9)	(73.6)
Others	15.8	15.4
Consolidated net business profit	222.5	208.5
Head office account and others [member]
Disclosure of operating segments [line items]
Consolidated gross profit	(158.5)	(145.1)
General and administrative expenses	67.4	72.2
Others	(68.8)	(61.3)
Consolidated net business profit	¥ (159.9)	¥ (134.2)

Segment Analysis - Reconciliati

Segment Analysis - Reconciliation of Segmental Results of Operations to Consolidated Income Statements (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disclosure of operating segments [line items]
Consolidated net business profit	¥ 770,900	¥ 721,900
Others	35,800	52,100
Profit before tax	870,972	1,024,552
Reconciling management reporting under Japanese GAAP to IFRS [member]
Disclosure of operating segments [line items]
Total credit costs	(100,300)	(83,100)
Gains on equity instruments	46,800	92,100
Extraordinary gains or losses and others	(11,000)	(6,200)
Profit before tax under Japanese GAAP	706,400	724,700
Scope of consolidation	2,700	3,200
Derivative financial instruments	255,800	464,500
Investment securities	(49,100)	(105,600)
Loans and advances	(61,000)	(33,200)
Investments in associates and joint ventures	10,100	(28,700)
Property, plant and equipment	400	(600)
Lease accounting	(900)
Defined benefit plans	(26,800)	(28,100)
Foreign currency translation	(16,300)	(22,500)
Classification of equity and liability	7,300	5,700
Others	¥ 42,400	¥ 45,200

Derivative Financial Instrume_3

Derivative Financial Instruments and Hedge Accounting - Derivative Financial Instruments by Type and Purpose of Derivatives (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Disclosure of detailed information about financial instruments [line items]
Assets	¥ 13,015,294	¥ 8,649,947
Liabilities	15,298,715	10,496,855
Trading [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	1,958,993,069	1,916,986,563
Assets	11,563,226	7,682,264
Liabilities	11,471,317	8,087,582
Trading [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	1,705,064,948	1,691,197,124
Assets	7,105,501	5,025,797
Liabilities	8,935,065	6,380,627
Trading [member] | Interest rate derivatives [member] | Futures [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	158,410,820	129,630,431
Assets	42,383	37,084
Liabilities	44,662	36,633
Trading [member] | Interest rate derivatives [member] | Listed options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	187,933,727	262,156,548
Assets	52,836	87,651
Liabilities	36,721	52,918
Trading [member] | Interest rate derivatives [member] | Forwards [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	31,225,313	24,354,115
Assets	78,469	30,619
Liabilities	72,821	24,358
Trading [member] | Interest rate derivatives [member] | Swaps [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	1,047,934,282	1,036,174,625
Assets	5,731,168	4,059,518
Liabilities	6,064,799	4,100,097
Trading [member] | Interest rate derivatives [member] | OTC options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	279,560,806	238,881,405
Assets	1,200,645	810,925
Liabilities	2,716,062	2,166,621
Trading [member] | Currency derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	247,544,947	220,393,641
Assets	4,353,447	2,571,317
Liabilities	2,417,493	1,629,519
Trading [member] | Currency derivatives [member] | Futures [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	980	1,114
Assets		145
Liabilities	181
Trading [member] | Currency derivatives [member] | Forwards [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	130,894,081	115,616,503
Assets	2,092,679	1,113,495
Liabilities	1,605,454	1,107,415
Trading [member] | Currency derivatives [member] | Swaps [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	106,052,283	93,961,952
Assets	2,027,596	1,282,512
Liabilities	538,251	352,236
Trading [member] | Currency derivatives [member] | OTC options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	10,597,603	10,814,072
Assets	233,172	175,165
Liabilities	273,607	169,868
Trading [member] | Equity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	3,087,398	2,372,833
Assets	52,245	54,508
Liabilities	61,296	42,208
Trading [member] | Equity derivatives [member] | Futures [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	1,726,002	1,369,369
Assets	23,713	11,259
Liabilities	19,235	16,491
Trading [member] | Equity derivatives [member] | Listed options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	679,406	565,733
Assets	11,528	9,312
Liabilities	17,067	17,713
Trading [member] | Equity derivatives [member] | Forwards [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	393,964	146,369
Assets	908	12,567
Liabilities	16,791	2
Trading [member] | Equity derivatives [member] | Swaps [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	31,119	39,235
Assets	91	433
Liabilities	1,382	2,554
Trading [member] | Equity derivatives [member] | OTC options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	256,907	252,127
Assets	16,005	20,937
Liabilities	6,821	5,448
Trading [member] | Commodity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	130,997	129,488
Assets	13,379	9,142
Liabilities	12,178	7,946
Trading [member] | Commodity derivatives [member] | Futures [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	52,700	25,427
Assets	1,932	407
Liabilities	1,572	1,247
Trading [member] | Commodity derivatives [member] | Swaps [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	65,539	73,010
Assets	11,251	8,567
Liabilities	10,168	6,331
Trading [member] | Commodity derivatives [member] | OTC options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	12,758	31,051
Assets	196	168
Liabilities	438	368
Trading [member] | Credit derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	3,164,779	2,893,477
Assets	38,654	21,500
Liabilities	45,285	27,282
Risk management [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	88,989,367	86,603,721
Assets	1,452,068	967,683
Liabilities	3,827,398	2,409,273
Risk management [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	63,920,478	65,003,591
Assets	1,200,112	763,819
Liabilities	1,355,496	1,032,506
Risk management [member] | Interest rate derivatives [member] | Futures [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	1,562,264	8,746,711
Assets	2,253	5,990
Liabilities	947	2,836
Risk management [member] | Interest rate derivatives [member] | Swaps [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	62,150,298	56,071,259
Assets	1,197,859	757,829
Liabilities	1,310,443	1,008,337
Risk management [member] | Interest rate derivatives [member] | OTC options [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	207,916	185,621
Liabilities	44,106	21,333
Risk management [member] | Currency derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	25,068,889	21,600,130
Assets	251,956	203,864
Liabilities	2,471,902	1,376,767
Risk management [member] | Currency derivatives [member] | Forwards [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	9,703,233	7,430,656
Assets	142,696	71,072
Liabilities	469,557	184,808
Risk management [member] | Currency derivatives [member] | Swaps [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	15,365,656	14,169,474
Assets	109,260	132,792
Liabilities	¥ 2,002,345	¥ 1,191,959

Derivative Financial Instrume_4

Derivative Financial Instruments and Hedge Accounting - Schedule of Items Designated as Hedging Instruments (Detail) - Interest rate risk [Member] - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Interest rate swaps [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	¥ 9,854,304	¥ 8,264,813
Carrying amounts, Assets	139,607	101,835
Carrying amounts, Liabilities	875,688	587,049
Interest rate option [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	207,916	185,621
Carrying amounts, Liabilities	¥ 44,106	¥ 21,333

Derivative Financial Instrume_5

Derivative Financial Instruments and Hedge Accounting - Schedule of Hedges of Net Investments in Foreign Operations (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Foreign exchange forward contracts [member] | Derivative Financial Instruments-Net [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	¥ 3,430,339	¥ 3,088,524
Carrying amounts, Assets	32,887	48,483
Carrying amounts, Liabilities	465,816	147,366
Foreign currency denominated financial liabilities [member] | Debt securities, borrowed money, deposits [member]
Disclosure of detailed information about financial instruments [line items]
Notional amounts	322,840	287,072
Carrying amounts, Liabilities	¥ 322,840	¥ 287,072

Investment Securities - Summary

Investment Securities - Summary of Investment Securities (Detail) - JPY (¥) ¥ in Millions		Sep. 30, 2023	Mar. 31, 2023
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		¥ 290,051	¥ 235,567
Equity instruments at fair value through other comprehensive income		5,246,873	4,548,608
Debt instruments at fair value through other comprehensive income		28,545,806	22,811,423
Total investment securities		34,082,730	27,595,598
Domestic [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		212,195	165,593
Debt instruments at fair value through other comprehensive income		11,500,722	11,610,961
Domestic [member] | Japanese government bonds [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		78,556	72,549
Domestic [member] | Japanese municipal bonds [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		128,649	93,044
Domestic [member] | Japanese corporate bonds [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		4,990
Domestic [member] | Debt instruments [member] | Japanese government bonds [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income		9,512,127	9,576,298
Domestic [member] | Debt instruments [member] | Japanese municipal bonds [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income		1,077,443	1,087,625
Domestic [member] | Debt instruments [member] | Japanese corporate bonds [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income		910,839	946,726
Domestic [member] | Debt instruments [member] | Other debt instruments [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income		313	312
Foreign [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		77,856	69,974
Debt instruments at fair value through other comprehensive income		17,045,084	11,200,462
Foreign [member] | Bonds issued by other governments and official institutions [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost	[1]	72,689	68,121
Foreign [member] | Mortgage- backed securities [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		1,926
Foreign [member] | Other debt instruments [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at amortized cost		3,241	1,853
Foreign [member] | Debt instruments [member] | U.S. Treasury and other U.S. government agency bonds [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income		9,825,401	5,232,456
Foreign [member] | Debt instruments [member] | Bonds issued by other governments and official institutions [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income	[1]	3,416,633	2,991,272
Foreign [member] | Debt instruments [member] | Mortgage- backed securities [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income		3,151,857	2,379,250
Foreign [member] | Debt instruments [member] | Other debt instruments [member]
Disclosure of detailed information about financial instruments [line items]
Debt instruments at fair value through other comprehensive income		651,193	597,484
Domestic equity instruments [member]
Disclosure of detailed information about financial instruments [line items]
Equity instruments at fair value through other comprehensive income		4,071,827	3,587,964
Foreign equity instruments [member]
Disclosure of detailed information about financial instruments [line items]
Equity instruments at fair value through other comprehensive income		¥ 1,175,046	¥ 960,644
[1]Bonds issued by governments and official institutions excluding U.S. Treasury and other U.S. government agencies.

Loans and Advances - Summary of

Loans and Advances - Summary of Loans and Advances (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Disclosure of detailed information about financial instruments [line items]
Loans and advances at amortized	¥ 116,285,384	¥ 111,891,134
Adjust: Unearned income, unamortized premiums—net and deferred loan fees—net	(446,390)	(388,579)
Gross carrying amount [member]
Disclosure of detailed information about financial instruments [line items]
Loans and advances at amortized	117,681,405	113,143,827
Allowance for loan losses [member]
Disclosure of detailed information about financial instruments [line items]
Less: Allowance for loan losses	(949,631)	(864,114)	¥ (990,168)	¥ (993,054)
12-month ECL [member] | Gross carrying amount [member]
Disclosure of detailed information about financial instruments [line items]
Loans and advances at amortized	112,702,852	108,254,496
12-month ECL [member] | Allowance for loan losses [member]
Disclosure of detailed information about financial instruments [line items]
Less: Allowance for loan losses	(206,054)	(187,455)	(175,289)	(162,919)
Lifetime ECL not credit-impaired [member] | Gross carrying amount [member]
Disclosure of detailed information about financial instruments [line items]
Loans and advances at amortized	3,770,596	3,718,669
Lifetime ECL not credit-impaired [member] | Allowance for loan losses [member]
Disclosure of detailed information about financial instruments [line items]
Less: Allowance for loan losses	(257,488)	(240,494)	(258,280)	(247,020)
Lifetime ECL credit-impaired [member] | Gross carrying amount [member]
Disclosure of detailed information about financial instruments [line items]
Loans and advances at amortized	1,207,957	1,170,662
Lifetime ECL credit-impaired [member] | Allowance for loan losses [member]
Disclosure of detailed information about financial instruments [line items]
Less: Allowance for loan losses	¥ (486,089)	¥ (436,165)	¥ (556,599)	¥ (583,115)

Loans and Advances - Reconcilia

Loans and Advances - Reconciliation of Allowance for Loan Losses (Detail) - Allowance for loan losses [member] - JPY (¥) ¥ in Millions		6 Months Ended
		Sep. 30, 2023	Sep. 30, 2022
Disclosure of detailed information about financial instruments [line items]
Allowance for loan losses at beginning of period		¥ 864,114	¥ 993,054
Provision for loan losses		129,983	86,989
Charge-offs	[1]	91,512	142,198
Recoveries		8,049	10,467
Net charge-offs		83,463	131,731
Others	[2]	38,997	41,856
Allowance for loan losses at end of period		949,631	990,168
12-month ECL [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for loan losses at beginning of period		187,455	162,919
Net transfers between stages		(1,301)	(7,616)
Provision for loan losses		12,665	12,104
Others	[2]	7,235	7,882
Allowance for loan losses at end of period		206,054	175,289
Lifetime ECL not credit-impaired [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for loan losses at beginning of period		240,494	247,020
Net transfers between stages		(9,373)	(8,529)
Provision for loan losses		18,250	5,737
Others	[2]	8,117	14,052
Allowance for loan losses at end of period		257,488	258,280
Lifetime ECL credit-impaired [member]
Disclosure of detailed information about financial instruments [line items]
Allowance for loan losses at beginning of period		436,165	583,115
Net transfers between stages		10,674	16,145
Provision for loan losses		99,068	69,148
Charge-offs	[1]	91,512	142,198
Recoveries		8,049	10,467
Net charge-offs		83,463	131,731
Others	[2]	23,645	19,922
Allowance for loan losses at end of period		¥ 486,089	¥ 556,599
[1]Charge-offs consist of the reduction of the allowance through the sales of loans and write-offs.[2]Others mainly include foreign exchange translations for the six months ended September 30, 2023 and 2022.

Loans and Advances - Summary _2

Loans and Advances - Summary of Key Factor of the Macroeconomic Scenarios (Detail) - Scenario Forecast [member]	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Japanese GDP
Disclosure of Detailed Information of key Factors of the Macroeconomic Scenarios Under The Base Scenario [Line Items]
GDP growth rate	2.60%	6.20%
Global GDP
Disclosure of Detailed Information of key Factors of the Macroeconomic Scenarios Under The Base Scenario [Line Items]
GDP growth rate	3.10%	3%

Loans and Advances - Additional

Loans and Advances - Additional Information (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Disclosure Of Detail Information Loans And Advances [Line Items]
Increase (decrease) in allowance for loan losses	¥ 85,517
Allowance for loan losses [member]
Disclosure Of Detail Information Loans And Advances [Line Items]
Allowance for loan losses beginning and end of period	¥ 949,631	¥ 864,114	¥ 990,168	¥ 993,054

Borrowings - Short-term Borrowi

Borrowings - Short-term Borrowings and Long-term Borrowings (with Original Maturities of More Than One Year) (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Disclosure of detailed information about borrowings [line items]
Borrowings	¥ 16,060,190	¥ 15,371,801
Unsubordinated borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	14,247,306	13,532,217
Subordinated borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	177,412	186,218
Liabilities associated with securitization transactions [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,210,393	1,236,369
Lease liabilities [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	¥ 425,079	¥ 416,997

Debt Securities in Issue - Summ

Debt Securities in Issue - Summary of Debt Securities in Issue (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Debt securities in issue [line items]
Debt securities in issue	¥ 13,725,816	¥ 11,984,994
Commercial paper [member]
Debt securities in issue [line items]
Debt securities in issue	2,874,209	2,585,889
Unsubordinated bonds [Member]
Debt securities in issue [line items]
Debt securities in issue	9,572,275	8,285,355
Subordinated bonds [Member]
Debt securities in issue [line items]
Debt securities in issue	¥ 1,279,332	¥ 1,113,750

Provisions - Movements by Class

Provisions - Movements by Class of Provisions (Detail) ¥ in Millions	6 Months Ended
	Sep. 30, 2023 JPY (¥)
Disclosure of other provisions [line items]
Beginning balance	¥ 247,344
Ending balance	225,396
IFRS 9 [member]
Disclosure of other provisions [line items]
Beginning balance	247,344
Additional provisions	4,386
Amounts used	(20,341)
Unused amounts reversed	(5,903)
Amortization of discount and effect of change in discount rate	(438)
Others	348
Ending balance	225,396
Provision for interest repayment [member]
Disclosure of other provisions [line items]
Beginning balance	128,234
Amounts used	(16,110)
Amortization of discount and effect of change in discount rate	(516)
Ending balance	111,608
Other provisions [member]
Disclosure of other provisions [line items]
Beginning balance	119,110
Additional provisions	4,386
Amounts used	(4,231)
Unused amounts reversed	(5,903)
Amortization of discount and effect of change in discount rate	78
Others	348
Ending balance	¥ 113,788

Provisions - Additional Informa

Provisions - Additional Information (Detail)	6 Months Ended
	Sep. 30, 2023
Interest Rate Restriction Act [member] | Minimum [member]
Disclosure of other provisions [line items]
Interest rates on loans	15%
Interest Rate Restriction Act [member] | Maximum [member]
Disclosure of other provisions [line items]
Interest rates on loans	20%
Act regulating the receipt of contributions, receipt of deposits and interest rates [member] | Maximum [member]
Disclosure of other provisions [line items]
Interest rates on loans	29.20%

Shareholders' Equity - Changes

Shareholders' Equity - Changes in Number of Issued Shares of Common Stock and Common Stock Held by SMFG or its Subsidiaries (Detail) - shares	Sep. 30, 2023	Mar. 31, 2023
Common stock [member]
Disclosure of classes of share capital [line items]
Number of shares	1,337,529,084	1,374,691,194
Treasury stock [member]
Disclosure of classes of share capital [line items]
Number of shares	3,455,590	30,070,650

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - JPY (¥) ¥ in Millions		1 Months Ended	6 Months Ended
	May 31, 2023	Nov. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Nov. 15, 2023	Mar. 31, 2023	Nov. 15, 2022
Total number of authorized shares of common stock			3,000,000,000			3,000,000,000
Purchase of treasury stock			¥ 61,326	¥ 34
Share repurchase program [member]
Shares authorized to be repurchased amount					¥ 150,000		¥ 200,000
Number of shares repurchased	37,640,000	3,568,800
Purchase of treasury stock	¥ 200,000	¥ 26,000
Shares authorized to be repurchased, shares					26,000,000		61,000,000

Shareholders' Equity - Number o

Shareholders' Equity - Number of Shares of Preferred Stock (Detail) - shares	Sep. 30, 2023	Mar. 31, 2023
Disclosure of classes of share capital [line items]
Preferred stock, Authorized	3,000,000,000	3,000,000,000
Type 5 preferred stock [member]
Disclosure of classes of share capital [line items]
Preferred stock, Authorized	167,000	167,000
Type 7 preferred stock [member]
Disclosure of classes of share capital [line items]
Preferred stock, Authorized	167,000	167,000
Type 8 preferred stock [member]
Disclosure of classes of share capital [line items]
Preferred stock, Authorized	115,000	115,000
Type 9 preferred stock [member]
Disclosure of classes of share capital [line items]
Preferred stock, Authorized	115,000	115,000

Equity Attributable To Other _3

Equity Attributable To Other Equity Instruments Holders - Equity Attributable to Other Equity Instruments Holders (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Statement [Line Items]
Equity attributable to other equity instruments holders	¥ 1,126,695	¥ 765,802
Perpetual Subordinated Bonds [Member]
Statement [Line Items]
Perpetual subordinated bonds	1,106,695	755,802
Perpetual Subordinated Borrowings [Member]
Statement [Line Items]
Perpetual subordinated bonds	¥ 20,000	¥ 10,000

Equity Attributable To Other _4

Equity Attributable To Other Equity Instruments Holders - Additional Information (Detail)	Sep. 30, 2023
Equity [abstract]
Common Equity Tier 1 capital ratio threshold where bonds may be written down	5.125%

Fee and Commission Income - Sum

Fee and Commission Income - Summary of Fee and Commission Income (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Fee and commission income from:
Loans	¥ 71,500	¥ 68,340
Credit card business	207,529	181,965
Guarantees	41,245	35,386
Securities-related business	88,549	55,537
Deposits	9,016	8,560
Remittances and transfers	74,658	73,526
Safe deposits	2,195	2,051
Trust fees	3,785	3,044
Investment trusts	82,543	74,220
Agency	4,746	4,630
Others	104,949	100,287
Total fee and commission income	¥ 690,715	¥ 607,546

Impairment Charges on Financi_3

Impairment Charges on Financial Assets - Summary of Impairment Charges (Reversals) on Financial Assets (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets	¥ 130,253	¥ 88,025
Loans and advances [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets	129,983	86,989
Loan commitments [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets	(5,132)	(7,429)
Financial guarantees [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets	¥ 5,402	¥ 8,465

Earnings Per Share - Summary of

Earnings Per Share - Summary of Earnings Per Share (Detail) - JPY (¥) ¥ / shares in Units, shares in Thousands, ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Basic:
Profit attributable to shareholders of the Company	¥ 651,127	¥ 762,185
Weighted average number of common stock in issue (in thousands of shares)	1,334,846	1,371,054
Basic earnings per share	¥ 487.79	¥ 555.91
Diluted:
Profit attributable to the common shareholders of the Company	¥ 651,127	¥ 762,185
Impact of dilutive potential ordinary shares issued by subsidiaries and associates	(2)
Net profit used to determine diluted earnings per share	¥ 651,125	¥ 762,185
Weighted average number of common stock in issue (in thousands of shares)	1,334,846	1,371,054
Adjustments for stock options (in thousands of shares)	397	478
Weighted average number of common stock for diluted earnings per share (in thousands of shares)	1,335,243	1,371,532
Diluted earnings per share	¥ 487.65	¥ 555.72

Dividends Per Share - Summary o

Dividends Per Share - Summary of Dividend Per Share (Detail) - JPY (¥) ¥ / shares in Units, ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Aggregate amount	¥ 171,385	¥ 146,649
Sumitomo mitsui banking corporation [member]
Dividends per share	¥ 125	¥ 105
Aggregate amount	¥ 168,078	¥ 143,936

Dividends Per Share - Additiona

Dividends Per Share - Additional Information (Detail) ¥ / shares in Units, ¥ in Millions	6 Months Ended
	Sep. 30, 2023 JPY (¥) ¥ / shares
Dividends 1 [abstract]
Proposed dividend, per share | ¥ / shares	¥ 135
Proposed dividend, total | ¥	¥ 180,100

Contingency and Capital Commi_3

Contingency and Capital Commitments - Additional Information (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Statement [Line Items]
Contractual commitments to acquire property, plant and equipment	¥ 1,365	¥ 1,134
Contractual commitments to acquire intangible assets	¥ 1,219	¥ 631

Contingency and Capital Commi_4

Contingency and Capital Commitments - Nominal Amounts of Undrawn Loan Commitments and Financial Guarantees and Other Credit-Related Contingent Liabilities (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Loan commitments [member]
Disclosure of contingent liabilities [Line Items]
Nominal amounts	¥ 85,878,811	¥ 79,068,816
Financial guarantees and other credit-related contingent liabilities [Member]
Disclosure of contingent liabilities [Line Items]
Nominal amounts	14,605,432	13,693,772
Loan commitments and financial guarantees and other credit-related contingent liabilities [Member]
Disclosure of contingent liabilities [Line Items]
Nominal amounts	¥ 100,484,243	¥ 92,762,588

Fair Value of Financial Asset_3

Fair Value of Financial Assets and Liabilities - Carrying Amounts of Financial Assets and Liabilities Carried at Fair Value (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Financial assets:
Trading assets	¥ 5,310,998	¥ 4,585,915
Derivative financial instruments	13,015,294	8,649,947
Financial assets at fair value through profit or loss	1,900,462	1,488,239
Debt instruments	28,545,806	22,811,423
Financial liabilities:
Trading liabilities	4,187,152	3,291,089
Derivative financial instruments	15,298,715	10,496,855
Financial liabilities designated at fair value through profit or loss	421,392	414,106
At fair value [member]
Financial assets:
Trading assets	5,310,998	4,585,915
Derivative financial instruments	13,015,294	8,649,947
Financial assets at fair value through profit or loss	1,900,462	1,488,239
Debt instruments	28,545,806	22,811,423
Investment securities at fair value through other comprehensive income	33,792,679	27,360,031
Total	54,019,433	42,084,132
Financial liabilities:
Trading liabilities	4,187,152	3,291,089
Derivative financial instruments	15,298,715	10,496,855
Financial liabilities designated at fair value through profit or loss	421,392	414,106
Others	(19,287)	(11,938)
Total	19,887,972	14,190,112
At fair value [member] | Level 1 [member]
Financial assets:
Trading assets	4,365,646	4,072,916
Derivative financial instruments	134,645	151,848
Financial assets at fair value through profit or loss	508,360	346,368
Debt instruments	20,725,079	16,312,611
Investment securities at fair value through other comprehensive income	25,469,966	20,389,221
Total	30,478,617	24,960,353
Financial liabilities:
Trading liabilities	3,964,139	3,201,207
Derivative financial instruments	120,385	127,838
Total	4,084,524	3,329,045
At fair value [member] | Level 2 [member]
Financial assets:
Trading assets	945,352	512,999
Derivative financial instruments	12,862,627	8,476,307
Financial assets at fair value through profit or loss	641,762	406,203
Debt instruments	7,820,727	6,498,812
Investment securities at fair value through other comprehensive income	7,822,228	6,505,989
Total	22,271,969	15,901,498
Financial liabilities:
Trading liabilities	223,013	89,882
Derivative financial instruments	15,162,001	10,353,385
Financial liabilities designated at fair value through profit or loss	285,442	229,086
Others	(6,728)	(4,086)
Total	15,663,728	10,668,267
At fair value [member] | Level 3 [member]
Financial assets:
Derivative financial instruments	18,022	21,792
Financial assets at fair value through profit or loss	750,340	735,668
Investment securities at fair value through other comprehensive income	500,485	464,821
Total	1,268,847	1,222,281
Financial liabilities:
Derivative financial instruments	16,329	15,632
Financial liabilities designated at fair value through profit or loss	135,950	185,020
Others	(12,559)	(7,852)
Total	139,720	192,800
At fair value [member] | Debt instruments [member]
Financial assets:
Trading assets	4,949,235	4,229,845
Financial assets at fair value through profit or loss	1,814,029	1,392,889
Debt instruments	9,208,278	8,002,669
Financial liabilities:
Trading liabilities	3,792,059	3,101,433
At fair value [member] | Debt instruments [member] | Level 1 [member]
Financial assets:
Trading assets	4,004,541	3,732,551
Financial assets at fair value through profit or loss	506,426	343,539
Debt instruments	1,387,551	1,503,857
Financial liabilities:
Trading liabilities	3,574,685	3,017,272
At fair value [member] | Debt instruments [member] | Level 2 [member]
Financial assets:
Trading assets	944,694	497,294
Financial assets at fair value through profit or loss	641,478	398,883
Debt instruments	7,820,727	6,498,812
Financial liabilities:
Trading liabilities	217,374	84,161
At fair value [member] | Debt instruments [member] | Level 3 [member]
Financial assets:
Financial assets at fair value through profit or loss	666,125	650,467
At fair value [member] | Equity instruments [member]
Financial assets:
Trading assets	361,763	356,070
Financial liabilities:
Trading liabilities	395,093	189,656
At fair value [member] | Equity instruments [member] | Level 1 [member]
Financial assets:
Trading assets	361,105	340,365
Financial liabilities:
Trading liabilities	389,454	183,935
At fair value [member] | Equity instruments [member] | Level 2 [member]
Financial assets:
Trading assets	658	15,705
Financial liabilities:
Trading liabilities	5,639	5,721
At fair value [member] | Equity instruments [member]
Financial assets:
Financial assets at fair value through profit or loss	86,433	95,350
At fair value [member] | Equity instruments [member] | Level 1 [member]
Financial assets:
Financial assets at fair value through profit or loss	1,934	2,829
At fair value [member] | Equity instruments [member] | Level 2 [member]
Financial assets:
Financial assets at fair value through profit or loss	284	7,320
At fair value [member] | Equity instruments [member] | Level 3 [member]
Financial assets:
Financial assets at fair value through profit or loss	84,215	85,201
At fair value [member] | Interest rate derivatives [member]
Financial assets:
Derivative financial instruments	8,305,613	5,789,616
Financial liabilities:
Derivative financial instruments	10,290,561	7,413,133
At fair value [member] | Interest rate derivatives [member] | Level 1 [member]
Financial assets:
Derivative financial instruments	97,472	130,725
Financial liabilities:
Derivative financial instruments	82,330	92,387
At fair value [member] | Interest rate derivatives [member] | Level 2 [member]
Financial assets:
Derivative financial instruments	8,208,059	5,658,891
Financial liabilities:
Derivative financial instruments	10,204,113	7,317,498
At fair value [member] | Interest rate derivatives [member] | Level 3 [member]
Financial assets:
Derivative financial instruments	82
Financial liabilities:
Derivative financial instruments	4,118	3,248
At fair value [member] | Currency derivatives [member]
Financial assets:
Derivative financial instruments	4,605,403	2,775,181
Financial liabilities:
Derivative financial instruments	4,889,395	3,006,286
At fair value [member] | Currency derivatives [member] | Level 1 [member]
Financial assets:
Derivative financial instruments		145
Financial liabilities:
Derivative financial instruments	181
At fair value [member] | Currency derivatives [member] | Level 2 [member]
Financial assets:
Derivative financial instruments	4,604,469	2,774,537
Financial liabilities:
Derivative financial instruments	4,884,340	3,001,220
At fair value [member] | Currency derivatives [member] | Level 3 [member]
Financial assets:
Derivative financial instruments	934	499
Financial liabilities:
Derivative financial instruments	4,874	5,066
At fair value [member] | Equity derivatives [member]
Financial assets:
Derivative financial instruments	52,245	54,508
Financial liabilities:
Derivative financial instruments	61,296	42,208
At fair value [member] | Equity derivatives [member] | Level 1 [member]
Financial assets:
Derivative financial instruments	35,241	20,571
Financial liabilities:
Derivative financial instruments	36,302	34,204
At fair value [member] | Equity derivatives [member] | Level 2 [member]
Financial assets:
Derivative financial instruments	408	13,002
Financial liabilities:
Derivative financial instruments	17,768	894
At fair value [member] | Equity derivatives [member] | Level 3 [member]
Financial assets:
Derivative financial instruments	16,596	20,935
Financial liabilities:
Derivative financial instruments	7,226	7,110
At fair value [member] | Commodity derivatives [member]
Financial assets:
Derivative financial instruments	13,379	9,142
Financial liabilities:
Derivative financial instruments	12,178	7,946
At fair value [member] | Commodity derivatives [member] | Level 1 [member]
Financial assets:
Derivative financial instruments	1,932	407
Financial liabilities:
Derivative financial instruments	1,572	1,247
At fair value [member] | Commodity derivatives [member] | Level 2 [member]
Financial assets:
Derivative financial instruments	11,447	8,735
Financial liabilities:
Derivative financial instruments	10,606	6,699
At fair value [member] | Credit derivatives [member]
Financial assets:
Derivative financial instruments	38,654	21,500
Financial liabilities:
Derivative financial instruments	45,285	27,282
At fair value [member] | Credit derivatives [member] | Level 2 [member]
Financial assets:
Derivative financial instruments	38,244	21,142
Financial liabilities:
Derivative financial instruments	45,174	27,074
At fair value [member] | Credit derivatives [member] | Level 3 [member]
Financial assets:
Derivative financial instruments	410	358
Financial liabilities:
Derivative financial instruments	111	208
At fair value [member] | Japanese government bonds [member]
Financial assets:
Debt instruments	9,512,127	9,576,298
At fair value [member] | Japanese government bonds [member] | Level 1 [member]
Financial assets:
Debt instruments	9,512,127	9,576,298
At fair value [member] | U.S. Treasury and other U.S. government agency bonds [member]
Financial assets:
Debt instruments	9,825,401	5,232,456
At fair value [member] | U.S. Treasury and other U.S. government agency bonds [member] | Level 1 [member]
Financial assets:
Debt instruments	9,825,401	5,232,456
At fair value [member] | Investment securities [member]
Financial assets:
Debt instruments	5,246,873	4,548,608
At fair value [member] | Investment securities [member] | Level 1 [member]
Financial assets:
Debt instruments	4,744,887	4,076,610
At fair value [member] | Investment securities [member] | Level 2 [member]
Financial assets:
Debt instruments	1,501	7,177
At fair value [member] | Investment securities [member] | Level 3 [member]
Financial assets:
Debt instruments	¥ 500,485	¥ 464,821

Fair Value of Financial Asset_4

Fair Value of Financial Assets and Liabilities - Reconciliations for Financial Assets and Liabilities Carried at Fair Value (Detail) - At fair value [member] - Level 3 [member] - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disclosure of detailed information about financial instruments [line items]
Beginning balance	¥ 1,029,481	¥ 919,971
Total gains (losses), Included in profit or loss	22,704	72,966
Total gains (losses), Included in other comprehensive income	36,826	(5,773)
Purchases	64,746	78,312
Sales	(46,616)	(49,479)
Issuances	(14,957)	(44,886)
Settlement	41,957	31,848
Transfers out of Level 3	(5,014)	(87,603)
Ending balance	1,129,127	915,356
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	38,410	93,303
Financial liabilities at fair value through profit or loss, category [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	(185,020)	(291,086)
Total gains (losses), Included in profit or loss	(10,861)	41,262
Total gains (losses), Included in other comprehensive income	(957)	220
Issuances	(14,957)	(44,886)
Settlement	75,845	65,889
Ending balance	(135,950)	(228,601)
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	516	57,436
Derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	6,160	10,395
Total gains (losses), Included in profit or loss	(3,384)	(1,675)
Purchases	3,738	2,617
Sales	(4,821)	(5,104)
Transfers out of Level 3		(5,522)
Ending balance	1,693	711
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	1,764	922
Derivatives [member] | Interest rate derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	(3,248)	(7,162)
Total gains (losses), Included in profit or loss	(2,329)	(3,439)
Purchases	1,541	8
Ending balance	(4,036)	(10,593)
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	(1,031)	(3,409)
Derivatives [member] | Currency derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	(4,567)	1,652
Total gains (losses), Included in profit or loss	663	(1,445)
Purchases	74
Sales	(110)
Transfers out of Level 3		(5,522)
Ending balance	(3,940)	(5,315)
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	580	(2,099)
Derivatives [member] | Equity derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	13,825	15,384
Total gains (losses), Included in profit or loss	(1,867)	3,709
Purchases	2,123	2,609
Sales	(4,711)	(5,104)
Ending balance	9,370	16,598
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	2,067	6,924
Derivatives [member] | Credit derivatives [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	150	521
Total gains (losses), Included in profit or loss	149	(500)
Ending balance	299	21
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	148	(494)
Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	735,668	728,897
Total gains (losses), Included in profit or loss	31,900	25,812
Total gains (losses), Included in other comprehensive income	305	398
Purchases	60,202	72,580
Sales	(39,675)	(40,403)
Settlement	(33,771)	(33,977)
Transfers out of Level 3	(4,289)	(80,718)
Ending balance	750,340	672,589
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	31,113	26,760
Financial assets at fair value through profit or loss [member] | Debt instruments [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	650,467	693,013
Total gains (losses), Included in profit or loss	32,792	25,736
Total gains (losses), Included in other comprehensive income	305	398
Purchases	54,432	68,177
Sales	(38,883)	(40,242)
Settlement	(29,456)	(33,344)
Transfers out of Level 3	(3,532)	(80,259)
Ending balance	666,125	633,479
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	32,586	26,808
Financial assets at fair value through profit or loss [member] | Equity instruments [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	85,201	35,884
Total gains (losses), Included in profit or loss	(892)	76
Purchases	5,770	4,403
Sales	(792)	(161)
Settlement	(4,315)	(633)
Transfers out of Level 3	(757)	(459)
Ending balance	84,215	39,110
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	(1,473)	(48)
Financial assets at fair value through other comprehensive income, category [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	464,821	468,713
Total gains (losses), Included in other comprehensive income	37,478	(6,391)
Purchases	806	2,175
Sales	(2,120)	(3,972)
Settlement	(117)	(64)
Transfers out of Level 3	(383)
Ending balance	500,485	460,461
Financial assets at fair value through other comprehensive income, category [member] | Equity instruments [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	464,821	468,713
Total gains (losses), Included in other comprehensive income	37,478	(6,391)
Purchases	806	2,175
Sales	(2,120)	(3,972)
Settlement	(117)	(64)
Transfers out of Level 3	(383)
Ending balance	500,485	460,461
Others-liabilities [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	7,852	3,052
Total gains (losses), Included in profit or loss	5,049	7,567
Purchases		940
Transfers out of Level 3	(342)	(1,363)
Ending balance	12,559	10,196
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held at ending balance	¥ 5,017	¥ 8,185

Fair Value of Financial Asset_5

Fair Value of Financial Assets and Liabilities - Reconciliations for Financial Assets and Liabilities Carried at Fair Value (Parenthetical) (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disclosure of detailed information about financial instruments [line items]
Transfers out of Level 3	¥ 5,014	¥ 87,603

Fair Value of Financial Asset_6

Fair Value of Financial Assets and Liabilities - Total and Changes in Unrealized Gains or Losses Included in Profit or Loss for Level 3 Financial Assets and Liabilities (Detail) - At fair value [member] - Level 3 [member] - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disclosure of detailed information about financial instruments [line items]
Total gains (losses) included in profit or loss	¥ 22,704	¥ 72,966
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held	38,410	93,303
Net interest income [Member]
Disclosure of detailed information about financial instruments [line items]
Total gains (losses) included in profit or loss	559	861
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held	525	576
Net trading income [Member]
Disclosure of detailed information about financial instruments [line items]
Total gains (losses) included in profit or loss	1,106	5,120
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held	6,256	8,531
Net income (loss) from financial assets and liabilities at fair value through profit or loss [Member]
Disclosure of detailed information about financial instruments [line items]
Total gains (losses) included in profit or loss	21,039	67,074
Changes in unrealized gains (losses) included in profit or loss related to assets and liabilities held	¥ 31,629	84,196
Other expenses [Member]
Disclosure of detailed information about financial instruments [line items]
Total gains (losses) included in profit or loss		¥ 89

Fair Value of Financial Asset_7

Fair Value of Financial Assets and Liabilities - Summary of Aggregate Deferred Day One Profit (Detail) - JPY (¥) ¥ in Millions	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Disclosure of detailed information about financial instruments [abstract]
Balance at beginning of period	¥ 22,276	¥ 27,100
Increase due to new trades	1,861	7,061
Reduction due to redemption, sales or passage of time	(10,649)	(16,017)
Balance at end of period	¥ 13,488	¥ 18,144

Fair Value of Financial Asset_8

Fair Value of Financial Assets and Liabilities - Quantitative Information about Significant Unobservable Inputs Used in Fair Value Measurement for Level 3 Financial Assets and Liabilities (Detail) - JPY (¥) ¥ in Millions	6 Months Ended	12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023
Financial assets:
Derivative financial instruments	¥ 13,015,294	¥ 8,649,947
Financial liabilities:
Derivative financial instruments	15,298,715	10,496,855
Financial liabilities designated at fair value through profit or loss	421,392	414,106
At fair value [member]
Financial assets:
Derivative financial instruments	13,015,294	8,649,947
Investment securities at fair value through other comprehensive income	33,792,679	27,360,031
Financial liabilities:
Derivative financial instruments	15,298,715	10,496,855
Financial liabilities designated at fair value through profit or loss	421,392	414,106
Others	(19,287)	(11,938)
At fair value [member] | Currency derivatives [member]
Financial assets:
Derivative financial instruments	4,605,403	2,775,181
Financial liabilities:
Derivative financial instruments	4,889,395	3,006,286
At fair value [member] | Equity derivatives [member]
Financial assets:
Derivative financial instruments	52,245	54,508
Financial liabilities:
Derivative financial instruments	61,296	42,208
At fair value [member] | Credit derivatives [member]
Financial assets:
Derivative financial instruments	38,654	21,500
Financial liabilities:
Derivative financial instruments	45,285	27,282
At fair value [member] | Level 3 [member]
Financial assets:
Derivative financial instruments	18,022	21,792
Investment securities at fair value through other comprehensive income	500,485	464,821
Financial liabilities:
Derivative financial instruments	16,329	15,632
Financial liabilities designated at fair value through profit or loss	135,950	185,020
Others	(12,559)	(7,852)
At fair value [member] | Level 3 [member] | Financial liabilities at fair value through profit or loss, category [member]
Financial liabilities:
Financial liabilities designated at fair value through profit or loss	135,950	185,020
At fair value [member] | Level 3 [member] | Currency derivatives [member]
Financial assets:
Derivative financial instruments	934	499
Financial liabilities:
Derivative financial instruments	4,874	5,066
At fair value [member] | Level 3 [member] | Equity derivatives [member]
Financial assets:
Derivative financial instruments	16,596	20,935
Financial liabilities:
Derivative financial instruments	7,226	7,110
At fair value [member] | Level 3 [member] | Credit derivatives [member]
Financial assets:
Derivative financial instruments	410	358
Financial liabilities:
Derivative financial instruments	111	208
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Interest Rate Derivatives [Member]
Financial assets:
Derivative financial instruments	82
Financial liabilities:
Derivative financial instruments	¥ 4,118	¥ 3,248
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Interest Rate Derivatives [Member] | Option pricing model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Interest rate to interest rate correlation	31%	26%
Quanto correlation	(5.00%)	(11.00%)
Interest rate volatility	3%
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Interest Rate Derivatives [Member] | Option pricing model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Interest rate to interest rate correlation	99%	99%
Quanto correlation	46%	42%
Interest rate volatility	8%
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Currency derivatives [member]
Financial assets:
Derivative financial instruments	¥ 934	¥ 499
Financial liabilities:
Derivative financial instruments	¥ 4,874	¥ 5,066
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Currency derivatives [member] | Option pricing model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Interest rate to interest rate correlation	26%	29%
Foreign exchange volatility	8%	12%
Quanto correlation	5%	8%
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Currency derivatives [member] | Option pricing model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Interest rate to interest rate correlation	99%	99%
Foreign exchange volatility	15%	36%
Quanto correlation	49%	50%
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Equity derivatives [member]
Financial assets:
Derivative financial instruments	¥ 16,596	¥ 20,935
Financial liabilities:
Derivative financial instruments	¥ 7,226	¥ 7,110
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Equity derivatives [member] | Option pricing model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Volatility	16%	12%
Equity to equity correlation	45%	48%
Quanto correlation	(29.00%)	(13.00%)
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Equity derivatives [member] | Option pricing model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Volatility	57%	70%
Equity to equity correlation	91%	92%
Quanto correlation	29%	38%
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Credit derivatives [member]
Financial assets:
Derivative financial instruments	¥ 410	¥ 358
Financial liabilities:
Derivative financial instruments	¥ 111	¥ 208
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Credit derivatives [member] | Credit default model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Quanto correlation	18%	15%
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Credit derivatives [member] | Credit default model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Quanto correlation	28%	25%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Debt instruments [member]
Financial assets:
Financial assets at fair value through profit or loss	¥ 666,125	¥ 650,467
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Debt instruments [member] | Option pricing model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Foreign exchange volatility	12%	13%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Debt instruments [member] | Option pricing model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Foreign exchange volatility	42%	43%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Debt instruments [member] | Discounted cash flow [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Discount margin	5%	5%
Probability of default rate	0%	0%
Loss given default rate	0%	0%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Debt instruments [member] | Discounted cash flow [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Discount margin	9%	9%
Probability of default rate	32%	33%
Loss given default rate	100%	100%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Equity instruments [member]
Financial assets:
Financial assets at fair value through profit or loss	¥ 84,215	¥ 85,201
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Equity instruments [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Loss given default rate	90%	90%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Equity instruments [member] | Discounted cash flow [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Probability of default rate	0%	0%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Equity instruments [member] | Discounted cash flow [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Probability of default rate	1%	1%
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Equity instruments [member] | Market comparable companies [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Price/Book value multiple	0.7	1.1
Liquidity discount	20%
At fair value [member] | Level 3 [member] | Financial assets at fair value through other comprehensive income, category [member] | Equity instruments [member]
Financial assets:
Investment securities at fair value through other comprehensive income	¥ 500,485	¥ 464,821
At fair value [member] | Level 3 [member] | Financial assets at fair value through other comprehensive income, category [member] | Equity instruments [member] | Market comparable companies [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Liquidity discount	20%	20%
At fair value [member] | Level 3 [member] | Financial assets at fair value through other comprehensive income, category [member] | Equity instruments [member] | Market comparable companies [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Price/Book value multiple	0.3	0.2
At fair value [member] | Level 3 [member] | Financial assets at fair value through other comprehensive income, category [member] | Equity instruments [member] | Market comparable companies [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Price/Book value multiple	3.5	3.7
At fair value [member] | Level 3 [member] | Financial liabilities designated at fair value through profit or loss [member] | Financial liabilities at fair value through profit or loss, category [member]
Financial liabilities:
Financial liabilities designated at fair value through profit or loss	¥ 135,950	¥ 185,020
At fair value [member] | Level 3 [member] | Financial liabilities designated at fair value through profit or loss [member] | Option pricing model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Equity to equity correlation	43%	47%
Interest rate to interest rate correlation	26%	29%
Quanto correlation	(29.00%)	(13.00%)
Volatility	18%	17%
At fair value [member] | Level 3 [member] | Financial liabilities designated at fair value through profit or loss [member] | Option pricing model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Equity to equity correlation	89%	93%
Interest rate to interest rate correlation	27%	30%
Quanto correlation	49%	50%
Volatility	45%	52%
At fair value [member] | Level 3 [member] | Financial liabilities designated at fair value through profit or loss [member] | Credit default model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Quanto correlation	18%	15%
At fair value [member] | Level 3 [member] | Financial liabilities designated at fair value through profit or loss [member] | Credit default model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Quanto correlation	28%	25%
At fair value [member] | Level 3 [member] | Others [member]
Financial liabilities:
Others	¥ (12,559)	¥ (7,852)
At fair value [member] | Level 3 [member] | Others [member] | Option pricing model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Equity to equity correlation		80%
Interest rate to interest rate correlation	26%	26%
Quanto correlation	(5.00%)	(11.00%)
Volatility	27%	24%
Foreign exchange volatility	10%	12%
At fair value [member] | Level 3 [member] | Others [member] | Option pricing model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Equity to equity correlation		83%
Interest rate to interest rate correlation	99%	99%
Quanto correlation	49%	50%
Volatility	28%	28%
Foreign exchange volatility	42%	43%
At fair value [member] | Level 3 [member] | Others [member] | Credit default model [member] | Minimum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Quanto correlation	18%	15%
At fair value [member] | Level 3 [member] | Others [member] | Credit default model [member] | Maximum [member]
Disclosure of significant unobservable inputs used in fair value measurement [Abstract]
Quanto correlation	28%	25%

Fair Value of Financial Asset_9

Fair Value of Financial Assets and Liabilities - Impact of Valuation Sensitivity (Detail) - JPY (¥) ¥ in Millions	6 Months Ended	12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Financial assets:
Financial assets at fair value through profit or loss	¥ 1,900,462	¥ 1,488,239
Financial liabilities:
Financial liabilities designated at fair value through profit or loss	(421,392)	(414,106)
At fair value [member]
Financial assets:
Financial assets at fair value through profit or loss	1,900,462	1,488,239
Investment securities at fair value through other comprehensive income	33,792,679	27,360,031
Financial liabilities:
Financial liabilities designated at fair value through profit or loss	(421,392)	(414,106)
At fair value [member] | Level 3 [member]
Financial assets:
Derivative financial instruments	1,129,127	1,029,481	¥ 915,356	¥ 919,971
Financial assets at fair value through profit or loss	750,340	735,668
Investment securities at fair value through other comprehensive income	500,485	464,821
Financial liabilities:
Financial liabilities designated at fair value through profit or loss	(135,950)	(185,020)
At fair value [member] | Level 3 [member] | Financial liabilities at fair value through profit or loss, category [member]
Financial assets:
Derivative financial instruments	(135,950)	(185,020)	(228,601)	(291,086)
Financial liabilities:
Financial liabilities designated at fair value through profit or loss	(135,950)	(185,020)
At fair value [member] | Level 3 [member] | Financial liabilities at fair value through profit or loss, category [member] | Recorded in profit and loss [member]
Financial liabilities:
Financial liabilities, Favorable changes	424	1,007
Financial liabilities, Unfavorable changes	437	1,109
At fair value [member] | Level 3 [member] | Debt instruments [member]
Financial assets:
Financial assets at fair value through profit or loss	666,125	650,467
At fair value [member] | Level 3 [member] | Equity instruments [member]
Financial assets:
Financial assets at fair value through profit or loss	84,215	85,201
At fair value [member] | Level 3 [member] | Others [member]
Financial liabilities:
Others	12,559	7,852
At fair value [member] | Level 3 [member] | Others [member] | Recorded in profit and loss [member]
Financial liabilities:
Financial liabilities, Favorable changes	51	62
Financial liabilities, Unfavorable changes	50	61
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Interest rate derivatives [member]
Financial assets:
Derivative financial instruments	(4,036)	(3,248)
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Interest rate derivatives [member] | Recorded in profit and loss [member]
Financial assets:
Financial assets, Favorable changes	7
Financial assets, Unfavorable changes	6
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Currency derivatives [member]
Financial assets:
Derivative financial instruments	(3,940)	(4,567)
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Currency derivatives [member] | Recorded in profit and loss [member]
Financial assets:
Financial assets, Favorable changes	5	6
Financial assets, Unfavorable changes	5	6
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Equity derivatives [member]
Financial assets:
Derivative financial instruments	9,370	13,825
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Equity derivatives [member] | Recorded in profit and loss [member]
Financial assets:
Financial assets, Favorable changes	3,094	2,462
Financial assets, Unfavorable changes	3,065	2,467
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Credit derivatives [member]
Financial assets:
Derivative financial instruments	299	150
At fair value [member] | Level 3 [member] | Derivative financial assets [member] | Credit derivatives [member] | Recorded in profit and loss [member]
Financial assets:
Financial assets, Favorable changes	18	17
Financial assets, Unfavorable changes	18	17
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member]
Financial assets:
Derivative financial instruments	750,340	735,668	672,589	728,897
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Debt instruments [member]
Financial assets:
Derivative financial instruments	666,125	650,467	633,479	693,013
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Debt instruments [member] | Recorded in profit and loss [member]
Financial assets:
Financial assets, Favorable changes	257	917
Financial assets, Unfavorable changes	2,718	4,533
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Equity instruments [member]
Financial assets:
Derivative financial instruments	84,215	85,201	39,110	35,884
At fair value [member] | Level 3 [member] | Financial assets at fair value through profit or loss [member] | Equity instruments [member] | Recorded in profit and loss [member]
Financial assets:
Financial assets, Favorable changes	263	362
Financial assets, Unfavorable changes	688	875
At fair value [member] | Level 3 [member] | Financial assets at fair value through other comprehensive income, category [member]
Financial assets:
Derivative financial instruments	500,485	464,821	460,461	468,713
At fair value [member] | Level 3 [member] | Financial assets at fair value through other comprehensive income, category [member] | Equity instruments [member]
Financial assets:
Derivative financial instruments	500,485	464,821	¥ 460,461	¥ 468,713
Investment securities at fair value through other comprehensive income	500,485	464,821
At fair value [member] | Level 3 [member] | Financial assets at fair value through other comprehensive income, category [member] | Equity instruments [member] | Recorded in equity [member]
Financial assets:
Financial assets, Favorable changes	17,038	15,368
Financial assets, Unfavorable changes	¥ 17,038	¥ 15,368

Fair Value of Financial Asse_10

Fair Value of Financial Assets and Liabilities - Financial Assets and Liabilities Not Carried at Fair Value (Detail) - JPY (¥) ¥ in Millions	Sep. 30, 2023	Mar. 31, 2023
Investment securities:
Debt instruments at amortized cost	¥ 290,051	¥ 235,567
Loans and advances	116,285,384	111,891,134
Deposits:
Borrowings	16,060,190	15,371,801
Debt securities in issue	13,725,816	11,984,994
Carrying value [member]
Investment securities:
Debt instruments at amortized cost	290,051	235,567
Loans and advances	116,285,384	111,891,134
Other financial assets	8,063,908	5,360,634
Deposits:
Non-interest-bearing deposits, demand deposits and deposits at notice	125,399,091	123,181,105
Other deposits	52,722,107	49,746,705
Borrowings	15,635,111	14,954,804
Debt securities in issue	13,725,816	11,984,994
Other financial liabilities	12,105,474	8,522,212
Not carried at fair value [member]
Investment securities:
Debt instruments at amortized cost	288,504	235,541
Loans and advances	118,381,677	114,154,110
Other financial assets	8,061,023	5,357,987
Deposits:
Non-interest-bearing deposits, demand deposits and deposits at notice	125,412,459	123,009,507
Other deposits	52,740,173	49,607,234
Borrowings	15,546,303	14,876,449
Debt securities in issue	13,631,362	11,828,910
Other financial liabilities	¥ 12,105,317	¥ 8,522,110

Interest Rate Benchmark Refor_2

Interest Rate Benchmark Reform - Summary Of Financial Instruments Referencing The USD LIBOR (Detail) - USD LIBOR - JPY (¥) ¥ in Billions	Sep. 30, 2023	Mar. 31, 2023
Disclosure of quantitative information about financial instruments that have yet to transition to alternative benchmark rate [line items]
Carrying amount of non-derivative financial assets	¥ 2,908	¥ 9,568
Carrying amount of non-derivative financial liabilities	77	1,351
Derivative notional amounts	¥ 1,965	¥ 247,066