v3.26.1
Other Liabilities - Narrative (Details) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Subclassifications of assets, liabilities and equities [abstract]    
Accrued labor cost ¥ 304,931 ¥ 291,957
Government grants received ¥ 6,527 ¥ 12,001