Fair Value (Assets and Liabilities Measured at Fair Value by Level on Recurring Basis) (Detail) - JPY (¥)
¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
| Assets |
|
|
| Trading derivative assets |
¥ 38,949,000
|
¥ 20,748,000
|
| Available-for-sale debt securities |
22,634,341
|
30,413,168
|
| Equity securities |
5,172,605
|
4,633,194
|
| Liabilities |
|
|
| Trading derivative liabilities |
40,347,000
|
20,995,000
|
| Obligation to return securities received as collateral |
8,468,326
|
6,046,755
|
| Interest rate contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
32,082,000
|
14,896,000
|
| Liabilities |
|
|
| Trading derivative liabilities |
33,764,000
|
16,071,000
|
| Foreign exchange contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
6,626,000
|
5,625,000
|
| Liabilities |
|
|
| Trading derivative liabilities |
6,543,000
|
4,908,000
|
| Equity contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
148,000
|
146,000
|
| Liabilities |
|
|
| Trading derivative liabilities |
101,000
|
62,000
|
| Commodity contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
21,000
|
20,000
|
| Liabilities |
|
|
| Trading derivative liabilities |
20,000
|
20,000
|
| Credit derivatives |
|
|
| Assets |
|
|
| Trading derivative assets |
44,000
|
51,000
|
| Liabilities |
|
|
| Trading derivative liabilities |
71,000
|
53,000
|
| Other |
|
|
| Assets |
|
|
| Trading derivative assets |
28,000
|
10,000
|
| Liabilities |
|
|
| Trading derivative liabilities |
(152,000)
|
(119,000)
|
| Japanese national government and Japanese government agency bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
13,916,543
|
22,083,857
|
| Japanese prefectural and municipal bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
166,451
|
309,998
|
| Foreign government and official institution bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
4,599,226
|
4,078,469
|
| Corporate bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
981,260
|
903,883
|
| Residential mortgage-backed securities |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
1,017,022
|
1,122,251
|
| Asset-backed securities |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
1,600,322
|
1,412,151
|
| Other debt securities |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
353,517
|
502,559
|
| Fair value, recurring measurements |
|
|
| Assets |
|
|
| Trading account assets: |
44,625,695
|
38,377,502
|
| Trading derivative assets |
38,917,605
|
20,733,927
|
| Loans held for sale |
29,024
|
28,447
|
| Available-for-sale debt securities |
22,634,341
|
30,413,168
|
| Equity securities |
4,393,447
|
3,932,750
|
| Other |
4,913,748
|
2,739,166
|
| Total |
115,513,860
|
96,224,960
|
| Liabilities |
|
|
| Trading securities sold, not yet purchased |
610,777
|
392,105
|
| Trading derivative liabilities |
40,493,882
|
21,110,807
|
| Obligation to return securities received as collateral |
8,468,326
|
6,046,755
|
| Other |
(60,109)
|
217,874
|
| Total |
49,512,876
|
27,767,541
|
| Fair value, recurring measurements | Equity securities |
|
|
| Assets |
|
|
| Trading account assets: |
5,441,035
|
3,611,256
|
| Liabilities |
|
|
| Investment securities valued at net asset value |
277,252
|
349,587
|
| Unfunded commitments |
276,433
|
405,058
|
| Fair value, recurring measurements | Level 1 |
|
|
| Assets |
|
|
| Trading account assets: |
23,016,668
|
20,407,859
|
| Trading derivative assets |
158,262
|
58,729
|
| Loans held for sale |
0
|
0
|
| Available-for-sale debt securities |
16,264,022
|
23,867,794
|
| Equity securities |
4,178,047
|
3,779,986
|
| Other |
3,051,633
|
973,130
|
| Total |
46,668,632
|
49,087,498
|
| Liabilities |
|
|
| Trading securities sold, not yet purchased |
609,730
|
389,643
|
| Trading derivative liabilities |
51,133
|
48,534
|
| Obligation to return securities received as collateral |
8,130,080
|
5,754,639
|
| Other |
0
|
0
|
| Total |
8,790,943
|
6,192,816
|
| Fair value, recurring measurements | Level 1 | Equity securities |
|
|
| Assets |
|
|
| Trading account assets: |
4,467,963
|
2,660,196
|
| Fair value, recurring measurements | Level 2 |
|
|
| Assets |
|
|
| Trading account assets: |
18,618,405
|
15,222,947
|
| Trading derivative assets |
38,676,721
|
20,597,301
|
| Loans held for sale |
29,024
|
28,447
|
| Available-for-sale debt securities |
6,161,695
|
6,347,624
|
| Equity securities |
71,940
|
52,002
|
| Other |
1,852,710
|
1,757,936
|
| Total |
65,410,495
|
44,006,257
|
| Liabilities |
|
|
| Trading securities sold, not yet purchased |
1,047
|
2,462
|
| Trading derivative liabilities |
40,366,071
|
20,995,246
|
| Obligation to return securities received as collateral |
338,246
|
292,116
|
| Other |
29,054
|
267,202
|
| Total |
40,734,418
|
21,557,026
|
| Fair value, recurring measurements | Level 2 | Equity securities |
|
|
| Assets |
|
|
| Trading account assets: |
819,771
|
808,437
|
| Fair value, recurring measurements | Level 3 |
|
|
| Assets |
|
|
| Trading account assets: |
2,990,622
|
2,746,696
|
| Trading derivative assets |
82,622
|
77,897
|
| Loans held for sale |
0
|
0
|
| Available-for-sale debt securities |
208,624
|
197,750
|
| Equity securities |
143,460
|
100,762
|
| Other |
9,405
|
8,100
|
| Total |
3,434,733
|
3,131,205
|
| Liabilities |
|
|
| Trading securities sold, not yet purchased |
0
|
0
|
| Trading derivative liabilities |
76,678
|
67,027
|
| Obligation to return securities received as collateral |
0
|
0
|
| Other |
(89,163)
|
(49,328)
|
| Total |
(12,485)
|
17,699
|
| Fair value, recurring measurements | Level 3 | Equity securities |
|
|
| Assets |
|
|
| Trading account assets: |
153,301
|
142,623
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
13,916,543
|
22,083,857
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
7,440,600
|
6,895,255
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds | Level 1 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
13,317,045
|
21,152,903
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
6,934,540
|
6,140,726
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds | Level 2 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
599,498
|
930,954
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
506,060
|
754,529
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds | Level 3 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Japanese national government and Japanese government agency bonds | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
166,451
|
309,998
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
289,034
|
288,472
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds | Level 1 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds | Level 2 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
166,451
|
309,998
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
289,034
|
288,472
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds | Level 3 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Japanese prefectural and municipal bonds | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Foreign government and official institution bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
4,599,226
|
4,078,469
|
| Fair value, recurring measurements | Foreign government and official institution bonds | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
12,903,428
|
12,376,957
|
| Fair value, recurring measurements | Foreign government and official institution bonds | Level 1 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
2,946,977
|
2,714,891
|
| Fair value, recurring measurements | Foreign government and official institution bonds | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
11,607,994
|
11,602,182
|
| Fair value, recurring measurements | Foreign government and official institution bonds | Level 2 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
1,652,249
|
1,363,578
|
| Fair value, recurring measurements | Foreign government and official institution bonds | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
1,295,434
|
774,775
|
| Fair value, recurring measurements | Foreign government and official institution bonds | Level 3 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Foreign government and official institution bonds | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Corporate bonds |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
981,260
|
903,883
|
| Fair value, recurring measurements | Corporate bonds | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
2,823,018
|
2,897,938
|
| Fair value, recurring measurements | Corporate bonds | Level 1 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Corporate bonds | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
6,171
|
4,755
|
| Fair value, recurring measurements | Corporate bonds | Level 2 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
976,179
|
898,304
|
| Fair value, recurring measurements | Corporate bonds | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
2,702,368
|
2,717,719
|
| Fair value, recurring measurements | Corporate bonds | Level 3 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
5,081
|
5,579
|
| Fair value, recurring measurements | Corporate bonds | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
114,479
|
175,464
|
| Fair value, recurring measurements | Residential mortgage-backed securities |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
1,017,022
|
1,122,251
|
| Fair value, recurring measurements | Residential mortgage-backed securities | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
10,515,437
|
7,313,220
|
| Fair value, recurring measurements | Residential mortgage-backed securities | Level 1 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Residential mortgage-backed securities | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Residential mortgage-backed securities | Level 2 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
1,017,007
|
1,122,236
|
| Fair value, recurring measurements | Residential mortgage-backed securities | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
10,515,437
|
7,313,220
|
| Fair value, recurring measurements | Residential mortgage-backed securities | Level 3 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
15
|
15
|
| Fair value, recurring measurements | Residential mortgage-backed securities | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Asset-backed securities |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
1,600,322
|
1,412,151
|
| Fair value, recurring measurements | Asset-backed securities | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
3,455,151
|
3,096,186
|
| Fair value, recurring measurements | Asset-backed securities | Level 1 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Asset-backed securities | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Asset-backed securities | Level 2 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
1,451,519
|
1,269,867
|
| Fair value, recurring measurements | Asset-backed securities | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
1,346,557
|
1,279,679
|
| Fair value, recurring measurements | Asset-backed securities | Level 3 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
148,803
|
142,284
|
| Fair value, recurring measurements | Asset-backed securities | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
2,108,594
|
1,816,507
|
| Fair value, recurring measurements | Other debt securities |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
353,517
|
502,559
|
| Fair value, recurring measurements | Other debt securities | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
672,234
|
673,680
|
| Fair value, recurring measurements | Other debt securities | Level 1 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
0
|
0
|
| Fair value, recurring measurements | Other debt securities | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Other debt securities | Level 2 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
298,792
|
452,687
|
| Fair value, recurring measurements | Other debt securities | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
57,986
|
61,578
|
| Fair value, recurring measurements | Other debt securities | Level 3 |
|
|
| Assets |
|
|
| Available-for-sale debt securities |
54,725
|
49,872
|
| Fair value, recurring measurements | Other debt securities | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
614,248
|
612,102
|
| Fair value, recurring measurements | Commercial paper | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
1,085,758
|
1,224,538
|
| Fair value, recurring measurements | Commercial paper | Level 1 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Commercial paper | Level 2 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
1,085,758
|
1,224,538
|
| Fair value, recurring measurements | Commercial paper | Level 3 | Debt securities |
|
|
| Assets |
|
|
| Trading account assets: |
0
|
0
|
| Fair value, recurring measurements | Interest rate contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
32,082,129
|
14,895,681
|
| Liabilities |
|
|
| Trading derivative liabilities |
33,763,715
|
16,070,936
|
| Fair value, recurring measurements | Interest rate contracts | Level 1 |
|
|
| Assets |
|
|
| Trading derivative assets |
81,059
|
12,565
|
| Liabilities |
|
|
| Trading derivative liabilities |
17,435
|
28,532
|
| Fair value, recurring measurements | Interest rate contracts | Level 2 |
|
|
| Assets |
|
|
| Trading derivative assets |
31,975,609
|
14,860,818
|
| Liabilities |
|
|
| Trading derivative liabilities |
33,693,313
|
15,998,172
|
| Fair value, recurring measurements | Interest rate contracts | Level 3 |
|
|
| Assets |
|
|
| Trading derivative assets |
25,461
|
22,298
|
| Liabilities |
|
|
| Trading derivative liabilities |
52,967
|
44,232
|
| Fair value, recurring measurements | Foreign exchange contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
6,622,544
|
5,620,801
|
| Liabilities |
|
|
| Trading derivative liabilities |
6,538,096
|
4,904,908
|
| Fair value, recurring measurements | Foreign exchange contracts | Level 1 |
|
|
| Assets |
|
|
| Trading derivative assets |
8,451
|
1,416
|
| Liabilities |
|
|
| Trading derivative liabilities |
5,426
|
2,197
|
| Fair value, recurring measurements | Foreign exchange contracts | Level 2 |
|
|
| Assets |
|
|
| Trading derivative assets |
6,586,486
|
5,592,040
|
| Liabilities |
|
|
| Trading derivative liabilities |
6,530,669
|
4,900,685
|
| Fair value, recurring measurements | Foreign exchange contracts | Level 3 |
|
|
| Assets |
|
|
| Trading derivative assets |
27,607
|
27,345
|
| Liabilities |
|
|
| Trading derivative liabilities |
2,001
|
2,026
|
| Fair value, recurring measurements | Equity contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
147,914
|
145,997
|
| Liabilities |
|
|
| Trading derivative liabilities |
100,655
|
61,630
|
| Fair value, recurring measurements | Equity contracts | Level 1 |
|
|
| Assets |
|
|
| Trading derivative assets |
68,752
|
44,748
|
| Liabilities |
|
|
| Trading derivative liabilities |
28,272
|
17,805
|
| Fair value, recurring measurements | Equity contracts | Level 2 |
|
|
| Assets |
|
|
| Trading derivative assets |
70,564
|
94,288
|
| Liabilities |
|
|
| Trading derivative liabilities |
71,415
|
43,467
|
| Fair value, recurring measurements | Equity contracts | Level 3 |
|
|
| Assets |
|
|
| Trading derivative assets |
8,598
|
6,961
|
| Liabilities |
|
|
| Trading derivative liabilities |
968
|
358
|
| Fair value, recurring measurements | Commodity contracts |
|
|
| Assets |
|
|
| Trading derivative assets |
20,982
|
20,185
|
| Liabilities |
|
|
| Trading derivative liabilities |
20,303
|
19,927
|
| Fair value, recurring measurements | Commodity contracts | Level 1 |
|
|
| Assets |
|
|
| Trading derivative assets |
0
|
0
|
| Liabilities |
|
|
| Trading derivative liabilities |
0
|
0
|
| Fair value, recurring measurements | Commodity contracts | Level 2 |
|
|
| Assets |
|
|
| Trading derivative assets |
680
|
293
|
| Liabilities |
|
|
| Trading derivative liabilities |
0
|
1
|
| Fair value, recurring measurements | Commodity contracts | Level 3 |
|
|
| Assets |
|
|
| Trading derivative assets |
20,302
|
19,892
|
| Liabilities |
|
|
| Trading derivative liabilities |
20,303
|
19,926
|
| Fair value, recurring measurements | Credit derivatives |
|
|
| Assets |
|
|
| Trading derivative assets |
43,801
|
50,618
|
| Liabilities |
|
|
| Trading derivative liabilities |
71,012
|
53,351
|
| Fair value, recurring measurements | Credit derivatives | Level 1 |
|
|
| Assets |
|
|
| Trading derivative assets |
0
|
0
|
| Liabilities |
|
|
| Trading derivative liabilities |
0
|
0
|
| Fair value, recurring measurements | Credit derivatives | Level 2 |
|
|
| Assets |
|
|
| Trading derivative assets |
43,380
|
49,861
|
| Liabilities |
|
|
| Trading derivative liabilities |
70,674
|
52,921
|
| Fair value, recurring measurements | Credit derivatives | Level 3 |
|
|
| Assets |
|
|
| Trading derivative assets |
421
|
757
|
| Liabilities |
|
|
| Trading derivative liabilities |
338
|
430
|
| Fair value, recurring measurements | Other |
|
|
| Assets |
|
|
| Trading derivative assets |
235
|
645
|
| Liabilities |
|
|
| Trading derivative liabilities |
101
|
55
|
| Fair value, recurring measurements | Other | Level 1 |
|
|
| Assets |
|
|
| Trading derivative assets |
0
|
0
|
| Liabilities |
|
|
| Trading derivative liabilities |
0
|
0
|
| Fair value, recurring measurements | Other | Level 2 |
|
|
| Assets |
|
|
| Trading derivative assets |
2
|
1
|
| Liabilities |
|
|
| Trading derivative liabilities |
0
|
0
|
| Fair value, recurring measurements | Other | Level 3 |
|
|
| Assets |
|
|
| Trading derivative assets |
233
|
644
|
| Liabilities |
|
|
| Trading derivative liabilities |
101
|
55
|
| Fair value, recurring measurements | Marketable equity securities |
|
|
| Assets |
|
|
| Equity securities |
4,249,987
|
3,831,988
|
| Fair value, recurring measurements | Marketable equity securities | Level 1 |
|
|
| Assets |
|
|
| Equity securities |
4,178,047
|
3,779,986
|
| Fair value, recurring measurements | Marketable equity securities | Level 2 |
|
|
| Assets |
|
|
| Equity securities |
71,940
|
52,002
|
| Fair value, recurring measurements | Marketable equity securities | Level 3 |
|
|
| Assets |
|
|
| Equity securities |
0
|
0
|
| Fair value, recurring measurements | Nonmarketable equity securities |
|
|
| Assets |
|
|
| Equity securities |
143,460
|
100,762
|
| Fair value, recurring measurements | Nonmarketable equity securities | Real estate funds |
|
|
| Liabilities |
|
|
| Investment securities valued at net asset value |
40,477
|
47,248
|
| Unfunded commitments |
0
|
0
|
| Fair value, recurring measurements | Nonmarketable equity securities | Private equity and other funds |
|
|
| Liabilities |
|
|
| Investment securities valued at net asset value |
56,334
|
84,795
|
| Unfunded commitments |
1,775
|
13,650
|
| Fair value, recurring measurements | Nonmarketable equity securities | Level 1 |
|
|
| Assets |
|
|
| Equity securities |
0
|
0
|
| Fair value, recurring measurements | Nonmarketable equity securities | Level 2 |
|
|
| Assets |
|
|
| Equity securities |
0
|
0
|
| Fair value, recurring measurements | Nonmarketable equity securities | Level 3 |
|
|
| Assets |
|
|
| Equity securities |
¥ 143,460
|
¥ 100,762
|