Loans and Allowance for Credit Losses (Credit Quality Indicators of Loans and Year of Origination by Class) (Detail) - JPY (¥)
¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
¥ 145,325,480
|
¥ 131,881,305
|
| Commercial | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
40,955,619
|
36,144,399
|
| Financing receivable, year 2 |
12,944,026
|
14,800,806
|
| Financing receivable, year 3 |
10,257,523
|
9,780,316
|
| Financing receivable, year 4 |
6,692,362
|
4,868,593
|
| Financing receivable, year 5 |
3,535,686
|
4,571,927
|
| Prior |
10,669,085
|
9,808,543
|
| Revolving loans amortized cost basis |
33,514,937
|
26,976,735
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
61,791
|
78,570
|
| Total |
118,631,029
|
107,029,889
|
| Commercial | Domestic |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
64,192,347
|
61,669,333
|
| Commercial | Domestic | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
24,813,049
|
24,117,429
|
| Financing receivable, year 2 |
6,744,426
|
7,173,200
|
| Financing receivable, year 3 |
5,711,688
|
6,154,487
|
| Financing receivable, year 4 |
4,720,077
|
3,848,005
|
| Financing receivable, year 5 |
2,927,815
|
4,060,428
|
| Prior |
8,958,519
|
7,912,621
|
| Revolving loans amortized cost basis |
10,155,350
|
8,272,309
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
64,030,924
|
61,538,479
|
| Commercial | Domestic | Normal | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
24,703,682
|
23,928,261
|
| Financing receivable, year 2 |
6,632,617
|
7,042,016
|
| Financing receivable, year 3 |
5,613,025
|
6,052,900
|
| Financing receivable, year 4 |
4,670,059
|
3,665,031
|
| Financing receivable, year 5 |
2,851,319
|
3,962,275
|
| Prior |
8,381,226
|
7,288,161
|
| Revolving loans amortized cost basis |
9,989,979
|
8,073,197
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
62,841,907
|
60,011,841
|
| Commercial | Domestic | Close Watch | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
96,046
|
128,827
|
| Financing receivable, year 2 |
104,366
|
122,907
|
| Financing receivable, year 3 |
71,621
|
90,760
|
| Financing receivable, year 4 |
40,514
|
166,698
|
| Financing receivable, year 5 |
65,825
|
78,351
|
| Prior |
499,564
|
529,207
|
| Revolving loans amortized cost basis |
150,293
|
184,168
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
1,028,229
|
1,300,918
|
| Commercial | Domestic | Likely to become Bankrupt or Legally/Virtually Bankrupt | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
13,321
|
60,341
|
| Financing receivable, year 2 |
7,443
|
8,277
|
| Financing receivable, year 3 |
27,042
|
10,827
|
| Financing receivable, year 4 |
9,504
|
16,276
|
| Financing receivable, year 5 |
10,671
|
19,802
|
| Prior |
77,729
|
95,253
|
| Revolving loans amortized cost basis |
15,078
|
14,944
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
160,788
|
225,720
|
| Commercial | Domestic | Gross charge-offs | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
2,028
|
1,371
|
| Financing receivable, year 2 |
3,480
|
2,259
|
| Financing receivable, year 3 |
197
|
2,078
|
| Financing receivable, year 4 |
2,589
|
592
|
| Financing receivable, year 5 |
5,425
|
261
|
| Prior |
6,674
|
3,140
|
| Revolving loans amortized cost basis |
2,778
|
907
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
23,171
|
10,608
|
| Commercial | Foreign |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
55,672,365
|
46,247,819
|
| Commercial | Foreign | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
16,142,570
|
12,026,970
|
| Financing receivable, year 2 |
6,199,600
|
7,627,606
|
| Financing receivable, year 3 |
4,545,835
|
3,625,829
|
| Financing receivable, year 4 |
1,972,285
|
1,020,588
|
| Financing receivable, year 5 |
607,871
|
511,499
|
| Prior |
1,710,566
|
1,895,922
|
| Revolving loans amortized cost basis |
23,359,587
|
18,704,426
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
61,791
|
78,570
|
| Total |
54,600,105
|
45,491,410
|
| Commercial | Foreign | Normal | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
15,928,759
|
11,839,879
|
| Financing receivable, year 2 |
5,965,943
|
7,367,932
|
| Financing receivable, year 3 |
4,364,812
|
3,465,137
|
| Financing receivable, year 4 |
1,882,422
|
1,011,411
|
| Financing receivable, year 5 |
591,535
|
480,256
|
| Prior |
1,574,598
|
1,732,371
|
| Revolving loans amortized cost basis |
23,157,551
|
18,474,590
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
58,528
|
76,313
|
| Total |
53,524,148
|
44,447,889
|
| Commercial | Foreign | Close Watch | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
173,991
|
154,312
|
| Financing receivable, year 2 |
159,533
|
177,968
|
| Financing receivable, year 3 |
144,244
|
137,788
|
| Financing receivable, year 4 |
47,880
|
9,177
|
| Financing receivable, year 5 |
5,927
|
19,982
|
| Prior |
90,921
|
114,575
|
| Revolving loans amortized cost basis |
164,319
|
213,896
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
2,599
|
0
|
| Total |
789,414
|
827,698
|
| Commercial | Foreign | Likely to become Bankrupt or Legally/Virtually Bankrupt | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
39,820
|
32,779
|
| Financing receivable, year 2 |
74,124
|
81,706
|
| Financing receivable, year 3 |
36,779
|
22,904
|
| Financing receivable, year 4 |
41,983
|
0
|
| Financing receivable, year 5 |
10,409
|
11,261
|
| Prior |
45,047
|
48,976
|
| Revolving loans amortized cost basis |
37,717
|
15,940
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
664
|
2,257
|
| Total |
286,543
|
215,823
|
| Commercial | Foreign | Gross charge-offs | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
236
|
2,151
|
| Financing receivable, year 2 |
3,233
|
8,622
|
| Financing receivable, year 3 |
18,841
|
11,010
|
| Financing receivable, year 4 |
17,144
|
2,855
|
| Financing receivable, year 5 |
10
|
336
|
| Prior |
5,434
|
6,872
|
| Revolving loans amortized cost basis |
16,082
|
13,460
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
60,980
|
45,306
|
| Residential |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
12,842,510
|
12,561,780
|
| Residential | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
1,294,984
|
1,124,971
|
| Financing receivable, year 2 |
1,079,225
|
636,238
|
| Financing receivable, year 3 |
604,148
|
625,599
|
| Financing receivable, year 4 |
592,837
|
672,243
|
| Financing receivable, year 5 |
633,849
|
537,121
|
| Prior |
8,621,902
|
8,947,802
|
| Revolving loans amortized cost basis |
15,565
|
17,806
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
12,842,510
|
12,561,780
|
| Residential | Gross charge-offs | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
0
|
0
|
| Financing receivable, year 2 |
0
|
0
|
| Financing receivable, year 3 |
0
|
5
|
| Financing receivable, year 4 |
8
|
43
|
| Financing receivable, year 5 |
28
|
10
|
| Prior |
969
|
576
|
| Revolving loans amortized cost basis |
0
|
1
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
1,005
|
635
|
| Residential | Accrual | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
1,294,914
|
1,124,734
|
| Financing receivable, year 2 |
1,079,045
|
636,136
|
| Financing receivable, year 3 |
603,989
|
625,164
|
| Financing receivable, year 4 |
592,443
|
672,068
|
| Financing receivable, year 5 |
633,666
|
536,861
|
| Prior |
8,592,808
|
8,914,948
|
| Revolving loans amortized cost basis |
14,370
|
16,419
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
12,811,235
|
12,526,330
|
| Residential | Nonaccrual | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
70
|
237
|
| Financing receivable, year 2 |
180
|
102
|
| Financing receivable, year 3 |
159
|
435
|
| Financing receivable, year 4 |
394
|
175
|
| Financing receivable, year 5 |
183
|
260
|
| Prior |
29,094
|
32,854
|
| Revolving loans amortized cost basis |
1,195
|
1,387
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
31,275
|
35,450
|
| Card |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
557,508
|
498,773
|
| Card | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
20
|
38
|
| Financing receivable, year 2 |
149
|
179
|
| Financing receivable, year 3 |
273
|
270
|
| Financing receivable, year 4 |
306
|
310
|
| Financing receivable, year 5 |
325
|
279
|
| Prior |
909
|
703
|
| Revolving loans amortized cost basis |
466,827
|
416,238
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
88,699
|
80,756
|
| Total |
557,508
|
498,773
|
| Card | Gross charge-offs | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
19
|
3
|
| Financing receivable, year 2 |
83
|
52
|
| Financing receivable, year 3 |
136
|
112
|
| Financing receivable, year 4 |
195
|
93
|
| Financing receivable, year 5 |
121
|
70
|
| Prior |
364
|
152
|
| Revolving loans amortized cost basis |
9,151
|
9,249
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
15,507
|
12,271
|
| Total |
25,576
|
22,002
|
| Card | Accrual | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
0
|
1
|
| Financing receivable, year 2 |
4
|
3
|
| Financing receivable, year 3 |
10
|
7
|
| Financing receivable, year 4 |
6
|
15
|
| Financing receivable, year 5 |
13
|
6
|
| Prior |
133
|
33
|
| Revolving loans amortized cost basis |
451,707
|
403,628
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
67,471
|
17,546
|
| Total |
519,344
|
421,239
|
| Card | Nonaccrual | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
20
|
37
|
| Financing receivable, year 2 |
145
|
176
|
| Financing receivable, year 3 |
263
|
263
|
| Financing receivable, year 4 |
300
|
295
|
| Financing receivable, year 5 |
312
|
273
|
| Prior |
776
|
670
|
| Revolving loans amortized cost basis |
15,120
|
12,610
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
21,228
|
63,210
|
| Total |
38,164
|
77,534
|
| Krungsri |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
9,844,777
|
8,846,908
|
| Krungsri | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
2,334,311
|
1,688,668
|
| Financing receivable, year 2 |
1,152,780
|
1,487,981
|
| Financing receivable, year 3 |
1,072,147
|
1,002,889
|
| Financing receivable, year 4 |
646,579
|
546,198
|
| Financing receivable, year 5 |
381,925
|
239,302
|
| Prior |
834,417
|
904,667
|
| Revolving loans amortized cost basis |
3,380,267
|
2,955,217
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
22,387
|
21,986
|
| Total |
9,824,813
|
8,846,908
|
| Krungsri | Gross charge-offs | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
4,017
|
5,970
|
| Financing receivable, year 2 |
29,542
|
53,874
|
| Financing receivable, year 3 |
55,774
|
50,589
|
| Financing receivable, year 4 |
33,983
|
21,359
|
| Financing receivable, year 5 |
16,756
|
7,095
|
| Prior |
17,430
|
23,135
|
| Revolving loans amortized cost basis |
34,217
|
32,294
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
7,008
|
5,327
|
| Total |
198,727
|
199,643
|
| Krungsri | Performing | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
2,102,663
|
1,507,924
|
| Financing receivable, year 2 |
974,527
|
1,325,246
|
| Financing receivable, year 3 |
933,091
|
855,947
|
| Financing receivable, year 4 |
507,781
|
442,848
|
| Financing receivable, year 5 |
299,850
|
193,714
|
| Prior |
597,348
|
651,811
|
| Revolving loans amortized cost basis |
3,116,056
|
2,698,374
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
5
|
7
|
| Total |
8,531,321
|
7,675,871
|
| Krungsri | Under-Performing | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
172,593
|
147,612
|
| Financing receivable, year 2 |
145,380
|
115,002
|
| Financing receivable, year 3 |
110,228
|
102,598
|
| Financing receivable, year 4 |
102,792
|
66,928
|
| Financing receivable, year 5 |
54,875
|
31,663
|
| Prior |
164,397
|
173,199
|
| Revolving loans amortized cost basis |
212,243
|
206,398
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
962,508
|
843,400
|
| Krungsri | Non-Performing | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
59,055
|
33,132
|
| Financing receivable, year 2 |
32,873
|
47,733
|
| Financing receivable, year 3 |
28,828
|
44,344
|
| Financing receivable, year 4 |
36,006
|
36,422
|
| Financing receivable, year 5 |
27,200
|
13,925
|
| Prior |
72,672
|
79,657
|
| Revolving loans amortized cost basis |
51,968
|
50,445
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
22,382
|
21,979
|
| Total |
330,984
|
327,637
|
| Other |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
2,215,973
|
2,056,692
|
| Other | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
896,023
|
795,726
|
| Financing receivable, year 2 |
337,578
|
385,741
|
| Financing receivable, year 3 |
231,863
|
162,365
|
| Financing receivable, year 4 |
89,166
|
38,968
|
| Financing receivable, year 5 |
15,613
|
34,651
|
| Prior |
90,163
|
91,677
|
| Revolving loans amortized cost basis |
555,567
|
547,564
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
2,215,973
|
2,056,692
|
| Other | Gross charge-offs | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
4,137
|
6,492
|
| Financing receivable, year 2 |
24,686
|
30,173
|
| Financing receivable, year 3 |
12,489
|
9,590
|
| Financing receivable, year 4 |
2,768
|
2,623
|
| Financing receivable, year 5 |
560
|
383
|
| Prior |
1,938
|
3,075
|
| Revolving loans amortized cost basis |
5,018
|
6,621
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
51,596
|
58,957
|
| Other | Accrual | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
892,614
|
790,753
|
| Financing receivable, year 2 |
330,796
|
378,532
|
| Financing receivable, year 3 |
228,120
|
159,835
|
| Financing receivable, year 4 |
87,984
|
38,006
|
| Financing receivable, year 5 |
14,994
|
33,940
|
| Prior |
84,026
|
86,122
|
| Revolving loans amortized cost basis |
546,441
|
537,014
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
2,184,975
|
2,024,202
|
| Other | Nonaccrual | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
3,409
|
4,973
|
| Financing receivable, year 2 |
6,782
|
7,209
|
| Financing receivable, year 3 |
3,743
|
2,530
|
| Financing receivable, year 4 |
1,182
|
962
|
| Financing receivable, year 5 |
619
|
711
|
| Prior |
6,137
|
5,555
|
| Revolving loans amortized cost basis |
9,126
|
10,550
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
¥ 30,998
|
¥ 32,490
|