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v3.25.2

Accumulated Other Comprehensive Income (Loss) (Changes in Components of Accumulated Other Comprehensive Income (Loss)) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Beginning Balance | ¥ 4,021,965 | ¥ 3,614,322 | ¥ 3,414,178
Total other comprehensive income (loss) | (16,139) | 206,038 | 135,693
Ending Balance | 4,171,783 | 4,021,965 | 3,614,322
Net unrealized gains (losses) on investment in securities |  |  |
Beginning Balance | (250,806) | (183,034) | (72,892)
Net unrealized gains (losses) | (152,264) | (69,102) | (109,745)
Reclassification adjustment included in net income, net of tax | (844) | 1,340 | (421)
Total other comprehensive income (loss) | (153,108) | (67,762) | (110,166)
Transaction with noncontrolling interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 | 10 | (24)
Ending Balance | (403,914) | (250,806) | (183,034)
Impact of changes in policy liability discount rate |  |  |
Beginning Balance | 257,785 | 164,516 | 37,536
Net unrealized gains (losses) | 158,339 | 93,269 | 126,980
Total other comprehensive income (loss) | 158,339 | 93,269 | 126,980
Transaction with noncontrolling interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 | 0 | 0
Ending Balance | 416,124 | 257,785 | 164,516
Debt Valuation Adjustments |  |  |
Beginning Balance | 84 | 275 | 221
Net unrealized gains (losses) | (32) | (177) | 67
Reclassification adjustment included in net income, net of tax | (3) | (14) | (13)
Total other comprehensive income (loss) | (35) | (191) | 54
Transaction with noncontrolling interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 | 0 | 0
Ending Balance | 49 | 84 | 275
Defined benefit pension plans |  |  |
Beginning Balance | 9,670 | (3,617) | (8,072)
Net unrealized gains (losses) | 5,572 | 13,559 | 4,659
Reclassification adjustment included in net income, net of tax | (444) | (266) | (211)
Total other comprehensive income (loss) | 5,128 | 13,293 | 4,448
Transaction with noncontrolling interests | 0 | 0 | 0
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 7 | 6 | (7)
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 | 0 | 0
Ending Balance | 14,791 | 9,670 | (3,617)
Foreign currency translation adjustments |  |  |
Beginning Balance | 324,208 | 155,912 | 61,914
Net unrealized gains (losses) | (37,786) | 163,062 | 90,616
Reclassification adjustment included in net income, net of tax | 17,726 | 10,242 | 4,091
Total other comprehensive income (loss) | (20,060) | 173,304 | 94,707
Transaction with noncontrolling interests | 136 | 11 | 2,903
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | (323) | 4,816 | 3,637
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | (50) | 203 | (25)
Ending Balance | 304,657 | 324,208 | 155,912
Net unrealized gains (losses) on derivative instruments |  |  |
Beginning Balance | 16,207 | 22,083 | 2,788
Net unrealized gains (losses) | (15,269) | (2,928) | 18,232
Reclassification adjustment included in net income, net of tax | 8,866 | (2,947) | 1,438
Total other comprehensive income (loss) | (6,403) | (5,875) | 19,670
Transaction with noncontrolling interests | 0 | (176) | 1,493
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | 213 | (175) | 1,868
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | 0 | 0 | 0
Ending Balance | 9,591 | 16,207 | 22,083
AOCI Attributable to Parent |  |  |
Beginning Balance | 357,148 | 156,135 | 21,495
Total other comprehensive income (loss) | (16,139) | 206,038 | 135,693
Transaction with noncontrolling interests | 136 | (165) | 4,396
Less: Other Comprehensive Income (Loss) Attributable to the Noncontrolling Interests | (103) | 4,647 | 5,498
Less: Other Comprehensive Income (Loss) Attributable to the Redeemable Noncontrolling Interests | (50) | 213 | (49)
Ending Balance | ¥ 341,298 | ¥ 357,148 | ¥ 156,135

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