Financial Risk Management - Summary of Loans and Advances at Amortized Cost (Detail) - JPY (¥)
¥ in Millions |
12 Months Ended |
Mar. 31, 2026 |
Mar. 31, 2025 |
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
¥ 130,516,241
|
¥ 125,190,819
|
| Adjust: Unearned income, unamortized premiums—net and deferred loan fees—net |
(603,143)
|
(530,933)
|
| Allowance for loan losses |
(1,236,839)
|
(1,102,522)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
1,102,522
|
|
| Ending balance |
1,236,839
|
1,102,522
|
| Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
132,356,223
|
126,824,274
|
| Allowance for loan losses |
(1,236,839)
|
(1,102,522)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
1,102,522
|
979,000
|
| Transfer to 12-month ECL |
|
|
| Transfer to lifetime ECL not credit-impaired |
|
|
| Transfer to lifetime ECL credit-impaired |
|
|
| Net transfers between stages |
|
|
| Provision (credit) for loan losses |
384,150
|
378,791
|
| Charge-offs |
274,513
|
264,684
|
| Recoveries |
22,014
|
18,553
|
| Net charge-offs |
252,499
|
246,131
|
| Others |
2,666
|
(9,138)
|
| Ending balance |
1,236,839
|
1,102,522
|
| Loan commitments and financial guarantees [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Beginning balance |
117,442
|
83,531
|
| Net transfers between stages |
|
|
| Provision (credit) for off-balance sheet items |
(5,124)
|
32,192
|
| Others |
(1,139)
|
1,719
|
| Ending balance |
111,179
|
117,442
|
| Loan commitments and financial guarantees [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
57,469,977
|
52,338,483
|
| Loan commitments and financial guarantees [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
111,179
|
117,442
|
| Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
77,971,747
|
73,240,162
|
| Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
54,384,476
|
53,584,112
|
| 12-month ECL [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
128,322,741
|
122,484,011
|
| Allowance for loan losses |
(295,235)
|
(295,352)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
295,352
|
196,325
|
| Transfer to 12-month ECL |
8,118
|
5,589
|
| Transfer to lifetime ECL not credit-impaired |
(10,070)
|
(10,433)
|
| Transfer to lifetime ECL credit-impaired |
(15,244)
|
(6,899)
|
| Net transfers between stages |
(17,196)
|
(11,743)
|
| Provision (credit) for loan losses |
45,154
|
109,536
|
| Charge-offs |
|
|
| Recoveries |
|
|
| Net charge-offs |
|
|
| Others |
(28,075)
|
1,234
|
| Ending balance |
295,235
|
295,352
|
| 12-month ECL [member] | Loan commitments and financial guarantees [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Beginning balance |
52,716
|
33,480
|
| Net transfers between stages |
55
|
763
|
| Provision (credit) for off-balance sheet items |
7,807
|
16,941
|
| Others |
(1,520)
|
1,532
|
| Ending balance |
59,058
|
52,716
|
| 12-month ECL [member] | Loan commitments and financial guarantees [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
56,582,932
|
51,258,693
|
| 12-month ECL [member] | Loan commitments and financial guarantees [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
59,058
|
52,716
|
| Lifetime ECL not credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
2,450,344
|
3,049,451
|
| Allowance for loan losses |
(194,947)
|
(251,680)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
251,680
|
257,542
|
| Transfer to 12-month ECL |
(7,211)
|
(4,573)
|
| Transfer to lifetime ECL not credit-impaired |
11,152
|
14,413
|
| Transfer to lifetime ECL credit-impaired |
(20,867)
|
(30,491)
|
| Net transfers between stages |
(16,926)
|
(20,651)
|
| Provision (credit) for loan losses |
(47,170)
|
17,264
|
| Charge-offs |
|
|
| Recoveries |
|
|
| Net charge-offs |
|
|
| Others |
7,363
|
(2,475)
|
| Ending balance |
194,947
|
251,680
|
| Lifetime ECL not credit-impaired [member] | Loan commitments and financial guarantees [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Beginning balance |
53,736
|
43,751
|
| Net transfers between stages |
(632)
|
(899)
|
| Provision (credit) for off-balance sheet items |
(21,930)
|
10,467
|
| Others |
60
|
417
|
| Ending balance |
31,234
|
53,736
|
| Lifetime ECL not credit-impaired [member] | Loan commitments and financial guarantees [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
746,332
|
998,202
|
| Lifetime ECL not credit-impaired [member] | Loan commitments and financial guarantees [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
31,234
|
53,736
|
| Lifetime ECL credit-impaired [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Allowance for loan losses |
(191,167)
|
|
| Loans and advances at amortized cost: |
|
|
| Ending balance |
191,167
|
|
| Lifetime ECL credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
1,583,138
|
1,290,812
|
| Allowance for loan losses |
(746,657)
|
(555,490)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
555,490
|
525,133
|
| Transfer to 12-month ECL |
(907)
|
(1,016)
|
| Transfer to lifetime ECL not credit-impaired |
(1,082)
|
(3,980)
|
| Transfer to lifetime ECL credit-impaired |
36,111
|
37,390
|
| Net transfers between stages |
34,122
|
32,394
|
| Provision (credit) for loan losses |
386,166
|
251,991
|
| Charge-offs |
274,513
|
264,684
|
| Recoveries |
22,014
|
18,553
|
| Net charge-offs |
252,499
|
246,131
|
| Others |
23,378
|
(7,897)
|
| Ending balance |
746,657
|
555,490
|
| Lifetime ECL credit-impaired [member] | Loan commitments and financial guarantees [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Beginning balance |
10,990
|
6,300
|
| Net transfers between stages |
577
|
136
|
| Provision (credit) for off-balance sheet items |
8,999
|
4,784
|
| Others |
321
|
(230)
|
| Ending balance |
20,887
|
10,990
|
| Lifetime ECL credit-impaired [member] | Loan commitments and financial guarantees [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
140,713
|
81,588
|
| Lifetime ECL credit-impaired [member] | Loan commitments and financial guarantees [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loan commitments and Financial Guarantees |
20,887
|
10,990
|
| IFRS 9 [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
130,516,241
|
125,190,819
|
| Adjust: Unearned income, unamortized premiums—net and deferred loan fees—net |
(603,143)
|
(530,933)
|
| IFRS 9 [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
132,356,223
|
126,824,274
|
| Impaired |
1,583,138
|
1,290,812
|
| IFRS 9 [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Allowance for loan losses |
(1,236,839)
|
(1,102,522)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
1,102,522
|
|
| Ending balance |
1,236,839
|
1,102,522
|
| IFRS 9 [member] | 12-month ECL [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
128,322,741
|
122,484,011
|
| Impaired |
|
|
| IFRS 9 [member] | 12-month ECL [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Allowance for loan losses |
(295,235)
|
(295,352)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
295,352
|
|
| Ending balance |
295,235
|
295,352
|
| IFRS 9 [member] | Lifetime ECL not credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
2,450,344
|
3,049,451
|
| Impaired |
|
|
| IFRS 9 [member] | Lifetime ECL not credit-impaired [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Allowance for loan losses |
(194,947)
|
(251,680)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
251,680
|
|
| Ending balance |
194,947
|
251,680
|
| IFRS 9 [member] | Lifetime ECL credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
1,583,138
|
1,290,812
|
| Impaired |
1,583,138
|
1,290,812
|
| IFRS 9 [member] | Lifetime ECL credit-impaired [member] | Allowance for loan losses [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Allowance for loan losses |
(746,657)
|
(555,490)
|
| Loans and advances at amortized cost: |
|
|
| Beginning balance |
555,490
|
|
| Ending balance |
746,657
|
555,490
|
| IFRS 9 [member] | Normal [member] | Other [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
25,315,731
|
24,879,019
|
| IFRS 9 [member] | Normal [member] | Other [member] | 12-month ECL [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
25,236,402
|
24,805,495
|
| IFRS 9 [member] | Normal [member] | Other [member] | Lifetime ECL not credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
79,329
|
73,524
|
| IFRS 9 [member] | Normal [member] | Other [member] | Lifetime ECL credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
59,033,219
|
53,738,605
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
43,202,101
|
42,774,826
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | 12-month ECL [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
58,797,982
|
53,549,667
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | 12-month ECL [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
42,397,402
|
41,787,148
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | Lifetime ECL not credit-impaired [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
235,237
|
188,938
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | Lifetime ECL not credit-impaired [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
804,699
|
987,678
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | Lifetime ECL credit-impaired [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Normal [member] | Grade category of one to six [member] | Lifetime ECL credit-impaired [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Normal [member] | Japanese government and local municipal corporations [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
1,890,955
|
2,341,701
|
| IFRS 9 [member] | Normal [member] | Japanese government and local municipal corporations [member] | 12-month ECL [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
1,890,955
|
2,341,701
|
| IFRS 9 [member] | Normal [member] | Japanese government and local municipal corporations [member] | Lifetime ECL not credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Normal [member] | Japanese government and local municipal corporations [member] | Lifetime ECL credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Requiring caution [member] | Other [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
232,652
|
248,930
|
| IFRS 9 [member] | Requiring caution [member] | Other [member] | 12-month ECL [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Requiring caution [member] | Other [member] | Lifetime ECL not credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
232,652
|
248,930
|
| IFRS 9 [member] | Requiring caution [member] | Other [member] | Lifetime ECL credit-impaired [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
514,318
|
708,530
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
584,109
|
841,851
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | 12-month ECL [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | 12-month ECL [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | Lifetime ECL not credit-impaired [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
514,318
|
708,530
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | Lifetime ECL not credit-impaired [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
¥ 584,109
|
841,851
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | Lifetime ECL credit-impaired [member] | Domestic [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|
| IFRS 9 [member] | Requiring caution [member] | 7 [member] | Lifetime ECL credit-impaired [member] | Foreign [member] | Gross carrying amount [member] |
|
|
| Disclosure of credit risk exposure [line items] |
|
|
| Loans and advances |
|
|