Loans and Allowance for Credit Losses (Credit Quality Indicators of Loans and Year of Origination by Class) (Detail) - JPY (¥)
¥ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
¥ 131,881,305
|
¥ 128,397,012
|
| Commercial | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
36,144,399
|
36,089,439
|
| Financing receivable, year 2 |
14,800,806
|
13,326,456
|
| Financing receivable, year 3 |
9,780,316
|
7,110,866
|
| Financing receivable, year 4 |
4,868,593
|
5,965,489
|
| Financing receivable, year 5 |
4,571,927
|
4,197,181
|
| Prior |
9,808,543
|
9,777,389
|
| Revolving loans amortized cost basis |
26,976,735
|
27,367,612
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
78,570
|
63,489
|
| Total |
107,029,889
|
103,897,921
|
| Commercial | Domestic |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
61,669,333
|
57,498,290
|
| 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 |
24,117,429
|
20,392,832
|
| Financing receivable, year 2 |
7,173,200
|
7,709,706
|
| Financing receivable, year 3 |
6,154,487
|
4,897,276
|
| Financing receivable, year 4 |
3,848,005
|
5,099,173
|
| Financing receivable, year 5 |
4,060,428
|
3,195,961
|
| Prior |
7,912,621
|
7,915,170
|
| Revolving loans amortized cost basis |
8,272,309
|
8,175,676
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
61,538,479
|
57,385,794
|
| 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 |
23,928,261
|
20,168,687
|
| Financing receivable, year 2 |
7,042,016
|
7,567,872
|
| Financing receivable, year 3 |
6,052,900
|
4,700,171
|
| Financing receivable, year 4 |
3,665,031
|
4,955,680
|
| Financing receivable, year 5 |
3,962,275
|
3,058,292
|
| Prior |
7,288,161
|
7,289,232
|
| Revolving loans amortized cost basis |
8,073,197
|
7,918,471
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
60,011,841
|
55,658,405
|
| 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 |
128,827
|
212,521
|
| Financing receivable, year 2 |
122,907
|
132,768
|
| Financing receivable, year 3 |
90,760
|
182,359
|
| Financing receivable, year 4 |
166,698
|
120,759
|
| Financing receivable, year 5 |
78,351
|
91,961
|
| Prior |
529,207
|
524,833
|
| Revolving loans amortized cost basis |
184,168
|
242,574
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
1,300,918
|
1,507,775
|
| 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 |
60,341
|
11,624
|
| Financing receivable, year 2 |
8,277
|
9,066
|
| Financing receivable, year 3 |
10,827
|
14,746
|
| Financing receivable, year 4 |
16,276
|
22,734
|
| Financing receivable, year 5 |
19,802
|
45,708
|
| Prior |
95,253
|
101,105
|
| Revolving loans amortized cost basis |
14,944
|
14,631
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
225,720
|
219,614
|
| 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 |
1,371
|
2,478
|
| Financing receivable, year 2 |
2,259
|
26,192
|
| Financing receivable, year 3 |
2,078
|
1,379
|
| Financing receivable, year 4 |
592
|
2,669
|
| Financing receivable, year 5 |
261
|
9,904
|
| Prior |
3,140
|
8
|
| Revolving loans amortized cost basis |
907
|
0
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
10,608
|
42,630
|
| Commercial | Foreign |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
46,247,819
|
47,353,215
|
| 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 |
12,026,970
|
15,696,607
|
| Financing receivable, year 2 |
7,627,606
|
5,616,750
|
| Financing receivable, year 3 |
3,625,829
|
2,213,590
|
| Financing receivable, year 4 |
1,020,588
|
866,316
|
| Financing receivable, year 5 |
511,499
|
1,001,220
|
| Prior |
1,895,922
|
1,862,219
|
| Revolving loans amortized cost basis |
18,704,426
|
19,191,936
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
78,570
|
63,489
|
| Total |
45,491,410
|
46,512,127
|
| 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 |
11,839,879
|
15,305,350
|
| Financing receivable, year 2 |
7,367,932
|
5,445,830
|
| Financing receivable, year 3 |
3,465,137
|
2,166,976
|
| Financing receivable, year 4 |
1,011,411
|
827,405
|
| Financing receivable, year 5 |
480,256
|
877,978
|
| Prior |
1,732,371
|
1,680,485
|
| Revolving loans amortized cost basis |
18,474,590
|
18,889,310
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
76,313
|
60,877
|
| Total |
44,447,889
|
45,254,211
|
| 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 |
154,312
|
330,450
|
| Financing receivable, year 2 |
177,968
|
142,807
|
| Financing receivable, year 3 |
137,788
|
41,638
|
| Financing receivable, year 4 |
9,177
|
23,625
|
| Financing receivable, year 5 |
19,982
|
110,527
|
| Prior |
114,575
|
129,927
|
| Revolving loans amortized cost basis |
213,896
|
269,944
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
827,698
|
1,048,918
|
| 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 |
32,779
|
60,807
|
| Financing receivable, year 2 |
81,706
|
28,113
|
| Financing receivable, year 3 |
22,904
|
4,976
|
| Financing receivable, year 4 |
0
|
15,286
|
| Financing receivable, year 5 |
11,261
|
12,715
|
| Prior |
48,976
|
51,807
|
| Revolving loans amortized cost basis |
15,940
|
32,682
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
2,257
|
2,612
|
| Total |
215,823
|
208,998
|
| 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 |
2,151
|
9,301
|
| Financing receivable, year 2 |
8,622
|
8,575
|
| Financing receivable, year 3 |
11,010
|
1,057
|
| Financing receivable, year 4 |
2,855
|
794
|
| Financing receivable, year 5 |
336
|
174
|
| Prior |
6,872
|
130
|
| Revolving loans amortized cost basis |
13,460
|
10,131
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
45,306
|
30,162
|
| Residential |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
12,561,780
|
12,497,378
|
| Residential | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
1,124,971
|
668,170
|
| Financing receivable, year 2 |
636,238
|
659,156
|
| Financing receivable, year 3 |
625,599
|
714,292
|
| Financing receivable, year 4 |
672,243
|
573,679
|
| Financing receivable, year 5 |
537,121
|
864,058
|
| Prior |
8,947,802
|
8,997,473
|
| Revolving loans amortized cost basis |
17,806
|
20,550
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
12,561,780
|
12,497,378
|
| 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 |
5
|
2
|
| Financing receivable, year 4 |
43
|
6
|
| Financing receivable, year 5 |
10
|
28
|
| Prior |
576
|
1,253
|
| Revolving loans amortized cost basis |
1
|
0
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
635
|
1,289
|
| 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 |
1,124,734
|
668,118
|
| Financing receivable, year 2 |
636,136
|
658,831
|
| Financing receivable, year 3 |
625,164
|
714,154
|
| Financing receivable, year 4 |
672,068
|
573,444
|
| Financing receivable, year 5 |
536,861
|
863,432
|
| Prior |
8,914,948
|
8,959,995
|
| Revolving loans amortized cost basis |
16,419
|
18,891
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
12,526,330
|
12,456,865
|
| 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 |
237
|
52
|
| Financing receivable, year 2 |
102
|
325
|
| Financing receivable, year 3 |
435
|
138
|
| Financing receivable, year 4 |
175
|
235
|
| Financing receivable, year 5 |
260
|
626
|
| Prior |
32,854
|
37,478
|
| Revolving loans amortized cost basis |
1,387
|
1,659
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
35,450
|
40,513
|
| Card |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
498,773
|
484,850
|
| Card | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
38
|
21
|
| Financing receivable, year 2 |
179
|
181
|
| Financing receivable, year 3 |
270
|
224
|
| Financing receivable, year 4 |
310
|
269
|
| Financing receivable, year 5 |
279
|
207
|
| Prior |
703
|
638
|
| Revolving loans amortized cost basis |
416,238
|
409,416
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
80,756
|
73,894
|
| Total |
498,773
|
484,850
|
| 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 |
3
|
18
|
| Financing receivable, year 2 |
52
|
63
|
| Financing receivable, year 3 |
112
|
100
|
| Financing receivable, year 4 |
93
|
112
|
| Financing receivable, year 5 |
70
|
97
|
| Prior |
152
|
117
|
| Revolving loans amortized cost basis |
9,249
|
9,712
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
12,271
|
10,801
|
| Total |
22,002
|
21,020
|
| 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 |
1
|
0
|
| Financing receivable, year 2 |
3
|
10
|
| Financing receivable, year 3 |
7
|
7
|
| Financing receivable, year 4 |
15
|
7
|
| Financing receivable, year 5 |
6
|
9
|
| Prior |
33
|
34
|
| Revolving loans amortized cost basis |
403,628
|
396,746
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
17,546
|
15,483
|
| Total |
421,239
|
412,296
|
| 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 |
37
|
21
|
| Financing receivable, year 2 |
176
|
171
|
| Financing receivable, year 3 |
263
|
217
|
| Financing receivable, year 4 |
295
|
262
|
| Financing receivable, year 5 |
273
|
198
|
| Prior |
670
|
604
|
| Revolving loans amortized cost basis |
12,610
|
12,670
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
63,210
|
58,411
|
| Total |
77,534
|
72,554
|
| Krungsri |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
8,846,908
|
8,805,112
|
| Krungsri | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
1,688,668
|
2,133,219
|
| Financing receivable, year 2 |
1,487,981
|
1,481,834
|
| Financing receivable, year 3 |
1,002,889
|
811,883
|
| Financing receivable, year 4 |
546,198
|
401,052
|
| Financing receivable, year 5 |
239,302
|
431,766
|
| Prior |
904,667
|
768,770
|
| Revolving loans amortized cost basis |
2,955,217
|
2,741,676
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
21,986
|
16,982
|
| Total |
8,846,908
|
8,787,182
|
| 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 |
5,970
|
8,765
|
| Financing receivable, year 2 |
53,874
|
55,828
|
| Financing receivable, year 3 |
50,589
|
34,544
|
| Financing receivable, year 4 |
21,359
|
12,995
|
| Financing receivable, year 5 |
7,095
|
15,439
|
| Prior |
23,135
|
19,729
|
| Revolving loans amortized cost basis |
32,294
|
30,709
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
5,327
|
2,632
|
| Total |
199,643
|
180,641
|
| 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 |
1,507,924
|
1,986,177
|
| Financing receivable, year 2 |
1,325,246
|
1,319,372
|
| Financing receivable, year 3 |
855,947
|
685,123
|
| Financing receivable, year 4 |
442,848
|
337,985
|
| Financing receivable, year 5 |
193,714
|
330,511
|
| Prior |
651,811
|
578,608
|
| Revolving loans amortized cost basis |
2,698,374
|
2,578,069
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
7
|
0
|
| Total |
7,675,871
|
7,815,845
|
| 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 |
147,612
|
110,487
|
| Financing receivable, year 2 |
115,002
|
108,846
|
| Financing receivable, year 3 |
102,598
|
86,273
|
| Financing receivable, year 4 |
66,928
|
49,140
|
| Financing receivable, year 5 |
31,663
|
80,033
|
| Prior |
173,199
|
141,150
|
| Revolving loans amortized cost basis |
206,398
|
136,897
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
843,400
|
712,826
|
| 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 |
33,132
|
36,555
|
| Financing receivable, year 2 |
47,733
|
53,616
|
| Financing receivable, year 3 |
44,344
|
40,487
|
| Financing receivable, year 4 |
36,422
|
13,927
|
| Financing receivable, year 5 |
13,925
|
21,222
|
| Prior |
79,657
|
49,012
|
| Revolving loans amortized cost basis |
50,445
|
26,710
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
21,979
|
16,982
|
| Total |
327,637
|
258,511
|
| Other |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Total |
2,056,692
|
1,758,167
|
| Other | Excluding loans held for sale and covered loans |
|
|
| Financing Receivables Credit Quality Indicator By Year Of Origination [Line Items] |
|
|
| Financing receivable, year 1 |
795,726
|
749,054
|
| Financing receivable, year 2 |
385,741
|
296,723
|
| Financing receivable, year 3 |
162,365
|
94,173
|
| Financing receivable, year 4 |
38,968
|
45,408
|
| Financing receivable, year 5 |
34,651
|
26,103
|
| Prior |
91,677
|
87,724
|
| Revolving loans amortized cost basis |
547,564
|
458,982
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
2,056,692
|
1,758,167
|
| 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 |
6,492
|
4,815
|
| Financing receivable, year 2 |
30,173
|
15,962
|
| Financing receivable, year 3 |
9,590
|
6,212
|
| Financing receivable, year 4 |
2,623
|
1,810
|
| Financing receivable, year 5 |
383
|
785
|
| Prior |
3,075
|
3,036
|
| Revolving loans amortized cost basis |
6,621
|
6,013
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
58,957
|
38,633
|
| 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 |
790,753
|
743,600
|
| Financing receivable, year 2 |
378,532
|
291,516
|
| Financing receivable, year 3 |
159,835
|
92,176
|
| Financing receivable, year 4 |
38,006
|
44,523
|
| Financing receivable, year 5 |
33,940
|
24,642
|
| Prior |
86,122
|
82,574
|
| Revolving loans amortized cost basis |
537,014
|
445,355
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
2,024,202
|
1,724,386
|
| 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 |
4,973
|
5,454
|
| Financing receivable, year 2 |
7,209
|
5,207
|
| Financing receivable, year 3 |
2,530
|
1,997
|
| Financing receivable, year 4 |
962
|
885
|
| Financing receivable, year 5 |
711
|
1,461
|
| Prior |
5,555
|
5,150
|
| Revolving loans amortized cost basis |
10,550
|
13,627
|
| Revolving Loans Converted to Term Loans Amortized Cost Basis |
0
|
0
|
| Total |
¥ 32,490
|
¥ 33,781
|