v3.26.3
Income and Expenses Relating to Life Insurance Operations - Gains or Losses Relating to Variable Annuity and Variable Life Insurance Contracts (Detail) - Variable Annuity and Variable Life Insurance Contracts - JPY (¥)
¥ in Millions
6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Life insurance premiums and related investment income    
Net realized and unrealized gains or losses from investment assets ¥ 21,692 ¥ 21,706
Net gains or losses from derivative contracts (290) (1,148)
Life insurance costs    
Changes in the fair value of the policy liabilities and policy account balances 7,685 6,707
Insurance costs recognized for insurance and annuity payouts as a result of insured events 10,702 10,571
Changes in the fair value of the reinsurance contracts 608 1,071
Futures    
Life insurance premiums and related investment income    
Net gains or losses from derivative contracts (292) (1,106)
Foreign exchange contracts    
Life insurance premiums and related investment income    
Net gains or losses from derivative contracts ¥ 2 ¥ (42)