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v3.25.3

Long-Duration Insurance Contracts Relating to Life Insurance Operations - Schedule of Balances of Policy Account (Detail) - Fixed Annuity And Annuitization Benefits - JPY (¥) ¥ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Mar. 31, 2025
Policyholder Account Balance [Line Items] |  |
Beginning balance | ¥ 119,093 | ¥ 138,419
Transfer in | 4,657 | 9,381
Surrenders and partial surrenders | (24) | (85)
Benefit payments and lump sum payments, etc. | (13,521) | (28,912)
Policy charges | (103) | (214)
Transfer out | (239) | (373)
Interests | 406 | 895
Others | (10) | (18)
Ending balance | ¥ 110,259 | ¥ 119,093
Weighted average guaranteed interest rate (%) | 0.70% | 0.70%
Benefits in excess of policy account balances (Millions of yen) | ¥ 0 | ¥ 0
Cash surrender value (Millions of yen) | ¥ 104,798 | ¥ 113,492

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- Definition Amount of cash to be paid to policyholder upon termination and surrender of long-duration contract issued by insurance entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-7A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29F -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-29F + Details
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