v3.26.1
Revenue from services provided to customers - Customer contract balances (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Contract with Customer, Asset and Liability [Abstract]    
Customer contract receivables ¥ 143,413 ¥ 114,158
Contract liabilities ¥ 6,004 ¥ 5,276