v3.26.1
Operating Segment and Revenue Information - Schedule of Transaction Price Allocated to the Remaining Performance Obligations (Details) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of transaction price allocated to remaining performance obligations [line items]    
Contract liabilities ¥ 11,668 ¥ 23,611
Within one year    
Disclosure of transaction price allocated to remaining performance obligations [line items]    
Contract liabilities 7,094 21,781
Between one and five years    
Disclosure of transaction price allocated to remaining performance obligations [line items]    
Contract liabilities 2,812 526
More than five years    
Disclosure of transaction price allocated to remaining performance obligations [line items]    
Contract liabilities ¥ 1,762 ¥ 1,304