v3.26.3
Commitments, Guarantees, and Contingent Liabilities (Assets Provided as Collateral for Short-Term and Long-Term Debt Payables to Financial Institutions) (Detail) - JPY (¥)
¥ in Millions
Sep. 30, 2026
Mar. 31, 2026
Commitments and Contingencies Disclosure [Line Items]    
Finance lease receivables, loans and investment in operating leases ¥ 2,487,406 ¥ 2,527,163
Other assets and other 1,910,090 1,912,870
Total Assets 15,606,595 18,002,776
Asset Pledged as Collateral without Right    
Commitments and Contingencies Disclosure [Line Items]    
Finance lease receivables, loans and investment in operating leases 208,232 201,058
Investment in securities 97,171 118,860
Property under facility operations 319,928 313,841
Other assets and other 129,419 145,612
Total Assets ¥ 754,750 ¥ 779,371