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Long-Duration Insurance Contracts Relating to Life Insurance Operations (Tables) | 12 Months Ended
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Mar. 31, 2025
Liability for Future Policy Benefit, Activity [Line Items] |
Schedule of Reconciliation of Liability For Future Policy Benefits | The following tables present balances of and changes in the liability for future policy benefits as of and for the fiscal year ended March 31, 2024 and 2025.
|  | Millions of yen |
|  | March 31, 2024 |  |  | March 31, 2025 |
Present value of expected net premiums |  | Yen-denominated insurance (First Sector) |  |  | Yen-denominated insurance (Third Sector) |  |  | Foreign currency denominated insurance |  |  | Yen-denominated insurance (First Sector) |  |  | Yen-denominated insurance (Third Sector) |  |  | Foreign currency denominated insurance |
Beginning balance |  | ¥ | 894,537 |  |  | ¥ | 1,389,063 |  |  | ¥ | 374,951 |  |  | ¥ | 873,038 |  |  | ¥ | 1,306,719 |  |  | ¥ | 389,664 |
Beginning balance at original discount rate |  |  | 865,333 |  |  |  | 1,338,398 |  |  |  | 409,847 |  |  |  | 858,959 |  |  |  | 1,289,145 |  |  |  | 424,186 |
Effect of changes in cash flow assumptions |  |  | (6,213 | ) |  |  | 3,634 |  |  |  | 2,106 |  |  |  | (9,660 | ) |  |  | (7,648 | ) |  |  | 66 |
Effect of actual variances from expected experience |  |  | 1,418 |  |  |  | 2,865 |  |  |  | (2,531 | ) |  |  | 984 |  |  |  | 812 |  |  |  | (3,193 | )
Adjusted beginning balance |  |  | 860,538 |  |  |  | 1,344,897 |  |  |  | 409,422 |  |  |  | 850,283 |  |  |  | 1,282,309 |  |  |  | 421,059 |
Issuances |  |  | 94,169 |  |  |  | 52,510 |  |  |  | 43,378 |  |  |  | 130,605 |  |  |  | 34,189 |  |  |  | 31,717 |
Interests |  |  | 10,840 |  |  |  | 18,439 |  |  |  | 12,405 |  |  |  | 10,568 |  |  |  | 17,489 |  |  |  | 12,323 |
Net premium earned |  |  | (106,300 | ) |  |  | (119,416 | ) |  |  | (61,594 | ) |  |  | (116,850 | ) |  |  | (116,049 | ) |  |  | (62,788 | )
Actual variances from cash flow assumptions |  |  | (550 | ) |  |  | (862 | ) |  |  | (1,222 | ) |  |  | (437 | ) |  |  | (770 | ) |  |  | (1,231 | )
Derecognition |  |  | 262 |  |  |  | (6,423 | ) |  |  | (32,681 | ) |  |  | 3,131 |  |  |  | (463 | ) |  |  | (27,567 | )
Effect of changes in foreign exchange rate |  |  | 0 |  |  |  | 0 |  |  |  | 54,478 |  |  |  | 0 |  |  |  | 0 |  |  |  | (4,667 | )
Ending balance at original discount rate |  |  | 858,959 |  |  |  | 1,289,145 |  |  |  | 424,186 |  |  |  | 877,300 |  |  |  | 1,216,705 |  |  |  | 368,846 |
Effect of changes in discount rates |  |  | 14,079 |  |  |  | 17,574 |  |  |  | (34,522 | ) |  |  | (21,869 | ) |  |  | (54,491 | ) |  |  | (22,914 | )
Ending balance |  | ¥ | 873,038 |  |  | ¥ | 1,306,719 |  |  | ¥ | 389,664 |  |  | ¥ | 855,431 |  |  | ¥ | 1,162,214 |  |  | ¥ | 345,932 |
|  | Millions of yen |
|  | 2024 |  |  | 2025 |
Present value of expected future policy benefits |  | Yen-denominated insurance (First Sector) |  |  | Yen-denominated insurance (Third Sector) |  |  | Foreign currency denominated insurance |  |  | Yen-denominated insurance (First Sector) |  |  | Yen-denominated insurance (Third Sector) |  |  | Foreign currency denominated insurance |
Beginning balance |  | ¥ | 1,571,886 |  |  | ¥ | 1,918,462 |  |  | ¥ | 387,073 |  |  | ¥ | 1,565,877 |  |  | ¥ | 1,844,599 |  |  | ¥ | 447,081 |
Beginning balance at original discount rate |  |  | 1,598,009 |  |  |  | 1,887,744 |  |  |  | 573,616 |  |  |  | 1,658,143 |  |  |  | 1,895,730 |  |  |  | 659,217 |
Effect of changes in cash flow assumptions |  |  | (7,962 | ) |  |  | 4,600 |  |  |  | 1,782 |  |  |  | (10,284 | ) |  |  | (8,470 | ) |  |  | 81 |
Adjusted beginning balance |  |  | 1,590,047 |  |  |  | 1,892,344 |  |  |  | 575,398 |  |  |  | 1,647,859 |  |  |  | 1,887,260 |  |  |  | 659,298 |
Issuances |  |  | 94,169 |  |  |  | 52,510 |  |  |  | 43,378 |  |  |  | 130,605 |  |  |  | 34,189 |  |  |  | 31,717 |
Interests |  |  | 23,981 |  |  |  | 28,159 |  |  |  | 17,649 |  |  |  | 24,463 |  |  |  | 27,997 |  |  |  | 19,385 |
Insurance claims paid |  |  | (52,161 | ) |  |  | (70,513 | ) |  |  | (17,757 | ) |  |  | (57,099 | ) |  |  | (72,044 | ) |  |  | (18,634 | )
Actual variances from cash flow assumptions |  |  | (11,644 | ) |  |  | (7,465 | ) |  |  | 11,794 |  |  |  | (9,571 | ) |  |  | (8,287 | ) |  |  | 13,086 |
Derecognition |  |  | 13,751 |  |  |  | 695 |  |  |  | (49,973 | ) |  |  | 14,655 |  |  |  | 8,960 |  |  |  | (46,693 | )
Effect of changes in foreign exchange rate |  |  | 0 |  |  |  | 0 |  |  |  | 78,728 |  |  |  | 0 |  |  |  | 0 |  |  |  | (8,154 | )
Ending balance at original discount rate |  |  | 1,658,143 |  |  |  | 1,895,730 |  |  |  | 659,217 |  |  |  | 1,750,912 |  |  |  | 1,878,075 |  |  |  | 650,005 |
Effect of changes in discount rates |  |  | (92,266 | ) |  |  | (51,131 | ) |  |  | (212,136 | ) |  |  | (239,476 | ) |  |  | (218,115 | ) |  |  | (207,066 | )
Ending balance |  | ¥ | 1,565,877 |  |  | ¥ | 1,844,599 |  |  | ¥ | 447,081 |  |  | ¥ | 1,511,436 |  |  | ¥ | 1,659,960 |  |  | ¥ | 442,939 |
Net liability for future policy benefits |  | ¥ | 692,839 |  |  | ¥ | 537,880 |  |  | ¥ | 57,417 |  |  | ¥ | 656,005 |  |  | ¥ | 497,746 |  |  | ¥ | 97,007 |
Deferred profit liabilities |  |  | 47,068 |  |  |  | 68,539 |  |  |  | 26,930 |  |  |  | 61,448 |  |  |  | 74,962 |  |  |  | 37,340 |
Subtotal |  |  | 739,907 |  |  |  | 606,419 |  |  |  | 84,347 |  |  |  | 717,453 |  |  |  | 572,708 |  |  |  | 134,347 |
Less: Reinsurance recoverable |  |  | 211 |  |  |  | 0 |  |  |  | 0 |  |  |  | 196 |  |  |  | 0 |  |  |  | 0 |
The liability for future policy benefits, after reinsurance recoverable |  | ¥ | 739,696 |  |  | ¥ | 606,419 |  |  | ¥ | 84,347 |  |  | ¥ | 717,257 |  |  | ¥ | 572,708 |  |  | ¥ | 134,347 |
Schedule of Policy Liabilities And Policy Account Balances In Statement of Financial Position | The following tables provide the breakdown of the policy liabilities and policy account balances recorded in the consolidated balance sheets as of March 31, 2024 and 2025:
|  | Millions of yen |
|  | 2024 |  |  | 2025 |
Yen-denominated insurance (First Sector) |  | ¥ | 739,696 |  |  | ¥ | 717,257 |
Yen-denominated insurance (Third Sector) |  |  | 606,419 |  |  |  | 572,708 |
Foreign currency denominated insurance |  |  | 84,347 |  |  |  | 134,347 |
Subtotal |  |  | 1,430,462 |  |  |  | 1,424,312 |
Policy account balances for single-payment whole life insurance |  |  | 0 |  |  |  | 134,572 |
Fixed annuities and annuitization benefits |  |  | 138,419 |  |  |  | 119,093 |
Policy account balances for variable annuity and variable life insurance contracts and market risk benefits |  |  | 167,207 |  |  |  | 136,257 |
Others* |  |  | 156,422 |  |  |  | 133,813 |
Total |  | ¥ | 1,892,510 |  |  | ¥ | 1,948,047 |
* | Others include unearned premiums and liabilities for unpaid claims.
Schedule of Liability For Future Policy Benefit Expected Future Policy Benefit Undiscounted Before Reinsurance | The amount of undiscounted and discounted expected future gross premiums and expected future policy benefits and expenses as of March 31, 2024 and 2025 are as follows:
|  | Millions of yen |
|  | 2024 |  |  | 2025 |
|  | Undiscounted |  |  | Discounted |  |  | Undiscounted |  |  | Discounted |
Yen-denominated insurance (First Sector) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future gross premiums |  | ¥ | 1,525,071 |  |  | ¥ | 1,395,370 |  |  | ¥ | 1,551,749 |  |  | ¥ | 1,362,111 |
Expected future policy benefits and expenses |  |  | 2,378,836 |  |  |  | 1,565,877 |  |  |  | 2,532,638 |  |  |  | 1,511,436 |
Yen-denominated insurance (Third Sector) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future gross premiums |  |  | 2,590,963 |  |  |  | 2,242,701 |  |  |  | 2,456,942 |  |  |  | 2,003,392 |
Expected future policy benefits and expenses |  |  | 2,583,535 |  |  |  | 1,844,599 |  |  |  | 2,552,133 |  |  |  | 1,659,960 |
Foreign currency denominated insurance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected future gross premiums |  |  | 685,134 |  |  |  | 535,943 |  |  |  | 617,771 |  |  |  | 493,328 |
Expected future policy benefits and expenses |  |  | 1,300,018 |  |  |  | 447,081 |  |  |  | 1,288,727 |  |  |  | 442,939 |
Schedule of Liability For Future Policy Benefit Gross Premiums And Interest Expense | The amounts of gross premiums and interest expense recognized in the consolidated statement of income for the fiscal year ended March 31, 2023, 2024 and 2025 are as follows:
|  | Millions of yen |
|  | Fiscal Year ended March 31, 2023 |  |  | Fiscal Year ended March 31, 2024 |  |  | Fiscal Year ended March 31, 2025 |
|  | Gross premiums |  |  | Interest expense |  |  | Gross premiums |  |  | Interest expense |  |  | Gross premiums |  |  | Interest expense |
Yen-denominated insurance (First Sector) |  | ¥ | 162,667 |  |  | ¥ | 12,309 |  |  | ¥ | 168,805 |  |  | ¥ | 13,142 |  |  | ¥ | 184,650 |  |  | ¥ | 13,895 |
Yen-denominated insurance (Third Sector) |  |  | 208,640 |  |  |  | 9,077 |  |  |  | 205,787 |  |  |  | 9,720 |  |  |  | 199,809 |  |  |  | 10,509 |
Foreign currency denominated insurance |  |  | 77,369 |  |  |  | 3,585 |  |  |  | 82,332 |  |  |  | 5,243 |  |  |  | 87,400 |  |  |  | 7,062 |
Total |  | ¥ | 448,676 |  |  | ¥ | 24,971 |  |  | ¥ | 456,924 |  |  | ¥ | 28,105 |  |  | ¥ | 471,859 |  |  | ¥ | 31,466 |
Schedule of Liability For Future Policy Benefit, Weighted Average Discount Rates | The weighted average discount rates for the liability for future policy benefits as of March 31, 2024 and 2025 are as follows:
|  | Weighted average rate |
|  | 2024 |  |  | 2025 |
Yen-denominated insurance (First Sector) |  |  |  |  |  |  |  |
Weighted average of the original discount rates |  |  | 1.7 | % |  |  | 1.8 | %
Weighted average of the current discount rates |  |  | 2.1 |  |  |  | 2.7 |
Yen-denominated insurance (Third Sector) |  |  |  |  |  |  |  |
Weighted average of the original discount rates |  |  | 1.7 |  |  |  | 1.7 |
Weighted average of the current discount rates |  |  | 2.1 |  |  |  | 2.7 |
Foreign currency denominated insurance |  |  |  |  |  |  |  |
Weighted average of the original discount rates |  |  | 3.1 |  |  |  | 3.3 |
Weighted average of the current discount rates |  |  | 5.5 |  |  |  | 5.9 |
Schedule of Liability For Future Policy Benefit, Weighted Average Duration | The weighted average duration of the liability for future policy benefit as of March 31, 2024 and 2025 are as follows:
|  | Years |
|  | 2024 |  |  | 2025 |
Yen-denominated insurance (First Sector) |  |  | 36.4 |  |  |  | 35.1 |
Yen-denominated insurance (Third Sector) |  |  | 34.7 |  |  |  | 32.5 |
Foreign currency denominated insurance |  |  | 36.9 |  |  |  | 33.5 |
Schedule of Deferred Policy Acquisition Costs | The following tables present balances of and changes in the deferred policy acquisition costs as of and for the fiscal year ended March 31, 2024 and 2025:
|  | Millions of yen |
|  | 2024 |
|  | Yen-denominated insurance (First Sector) |  |  | Yen-denominated insurance (Third Sector) |  |  | Foreign currency denominated insurance |  |  | Total |
Beginning balance |  | ¥ | 77,957 |  |  | ¥ | 166,696 |  |  | ¥ | 42,726 |  |  | ¥ | 287,379 |
Capitalization |  |  | 10,285 |  |  |  | 12,855 |  |  |  | 7,120 |  |  |  | 30,260 |
Amortization |  |  | (5,901 | ) |  |  | (9,970 | ) |  |  | (2,301 | ) |  |  | (18,172 | )
Effect of changes in foreign exchange rate |  |  | 0 |  |  |  | 0 |  |  |  | 6,267 |  |  |  | 6,267 |
Ending balance |  | ¥ | 82,341 |  |  | ¥ | 169,581 |  |  | ¥ | 53,812 |  |  | ¥ | 305,734 |
|  | Millions of yen |
|  | 2025 |
|  | Yen-denominated insurance (First Sector) |  |  | Yen-denominated insurance (Third Sector) |  |  | Foreign currency denominated insurance |  |  | Single- payment whole life insurance |  |  | Total |
Beginning balance |  | ¥ | 82,341 |  |  | ¥ | 169,581 |  |  | ¥ | 53,812 |  |  | ¥ | 0 |  |  | ¥ | 305,734 |
Capitalization |  |  | 13,431 |  |  |  | 9,180 |  |  |  | 6,633 |  |  |  | 6,627 |  |  |  | 35,871 |
Amortization |  |  | (6,411 | ) |  |  | (10,072 | ) |  |  | (2,689 | ) |  |  | (43 | ) |  |  | (19,215 | )
Effect of changes in foreign exchange rate |  |  | 0 |  |  |  | 0 |  |  |  | (605 | ) |  |  | (137 | ) |  |  | (742 | )
Others* |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (5,808 | ) |  |  | (5,808 | )
Ending balance |  | ¥ | 89,361 |  |  | ¥ | 168,689 |  |  | ¥ | 57,151 |  |  | ¥ | 639 |  |  | ¥ | 315,840 |
* | Others include adjustments of reinsurance.
Schedule of Minimum Guaranteed Interest Rates | The following table presents policy account balances for single-payment whole life insurance and fixed annuity and annuitization benefits by range of minimum guaranteed interest rates as of March 31, 2024 and 2025.
|  | $ |  |  |  | $ |  |  |  | $ |  |  |  | $ |  |
|  | Millions of yen |
|  | 2024 |  |  | 2025 |
Range of minimum guaranteed interest rates |  | Minimum guarantees |  |  | Minimum guarantees |  |  | Above minimum guarantees |
|  |  |  |  |  |  |  | 50-150bp |  |  | 150bp or more |
0.00% - less than 1.50% |  | ¥ | 131,328 |  |  | ¥ | 111,626 |  |  | ¥ | 7,421 |  |  | ¥ | 127,151 |
1.50% or more |  |  | 7,091 |  |  |  | 7,467 |  |  |  | 0 |  |  |  | 0 |
Total |  | ¥ | 138,419 |  |  | ¥ | 119,093 |  |  | ¥ | 7,421 |  |  | ¥ | 127,151 |
Schedule of Policy Account Balance And Market Risk Benefits | The following table provides information about policy account balances for variable annuity and variable life insurance contracts and market risk benefits as of and for the fiscal year ended March 31, 2024 and 2025:
|  | Millions of yen |
|  | 2024 |  |  | 2025 |
Beginning balance |  | ¥ | 163,734 |  |  | ¥ | 167,207 |
Effect of changes other than through net income and other comprehensive income |  |  | (26,997 | ) |  |  | (23,706 | )
Surrenders and withdrawals |  |  | (7,641 | ) |  |  | (4,924 | )
Transfer in |  |  | (7,891 | ) |  |  | (6,902 | )
Benefit payments |  |  | (11,434 | ) |  |  | (11,851 | )
Others |  |  | (31 | ) |  |  | (29 | )
Changes through net income |  |  | 30,205 |  |  |  | (7,292 | )
Effect of changes in fair value of corresponding investment assets |  |  | 40,846 |  |  |  | (3,538 | )
Fee income |  |  | (3,750 | ) |  |  | (3,590 | )
Effect of changes in fair value of market risk benefits |  |  | (6,891 | ) |  |  | (164 | )
Changes through other comprehensive income |  |  | 265 |  |  |  | 48 |
Effect of changes in the instrument-specific credit risk |  |  | 265 |  |  |  | 48 |
Ending balance |  | ¥ | 167,207 |  |  | ¥ | 136,257 |
|  | Millions of yen |
|  | 2024 |  |  | 2025 |
Polic y account balances |  | ¥ | 167,496 |  |  | ¥ | 136,662 |
Market risk benefits |  |  | (289 | ) |  |  | (405 | )
Total |  | ¥ | 167,207 |  |  | ¥ | 136,257 |
Whole Life Insurance [Member] |
Liability for Future Policy Benefit, Activity [Line Items] |
Schedule of Balances of Policy Account | The following table provides information about single-payment whole life insurance for the fiscal year ended March 31, 2025.
|  | Millions of yen |
|  | 2025 |
Beginning balance |  | ¥ | 0 |
New contract |  |  | 136,863 |
Surrenders and partial surrenders |  |  | (66 | )
Benefit payments and lump sum payments, etc. |  |  | (49 | )
Policy charges |  |  | (188 | )
Interests |  |  | 1,072 |
Effect of changes in foreign exchange rate |  |  | (3,060 | )
Ending balance |  | ¥ | 134,572 |
|  | 2025 |
Weighted average guaranteed interest rate (%) |  |  | 3.9 | %
Benefits in excess of policy account balances (Millions of yen) |  |  | 0 |
Cash surrender value (Millions of yen) |  |  | 127,659 |
Fixed Annuity And Annuitization Benefits [Member] |
Liability for Future Policy Benefit, Activity [Line Items] |
Schedule of Balances of Policy Account | The following table provides information about fixed annuity and annuitization benefits for the fiscal year ended March 31, 2024 and 2025.
|  | $ |  |  |  | $ |  |
|  | Millions of yen |
|  | 2024 |  |  | 2025 |
Beginning balance |  | ¥ | 158,952 |  |  | ¥ | 138,419 |
Transfer in |  |  | 10,249 |  |  |  | 9,381 |
Surrenders and partial surrenders |  |  | (71 | ) |  |  | (85 | )
Benefit payments and lump sum payments, etc. |  |  | (31,179 | ) |  |  | (28,912 | )
Policy charges |  |  | (229 | ) |  |  | (214 | )
Transfer out |  |  | (290 | ) |  |  | (373 | )
Interests |  |  | 1,023 |  |  |  | 895 |
Others |  |  | (36 | ) |  |  | (18 | )
Ending balance |  | ¥ | 138,419 |  |  | ¥ | 119,093 |
|  | $ |  |  |  | $ |  |
|  | 2024 |  |  | 2025 |
Weighted average guaranteed interest rate (%) |  |  | 0.7 |  |  |  | 0.7 |
Benefits in excess of policy account balances (Millions of yen) |  | ¥ | 1 |  |  | ¥ | 0 |
Cash surrender value (Millions of yen) |  |  | 132,411 |  |  |  | 113,492 |

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