v3.26.1
Financial Instruments - Financial Risk Management - Additional Information (Details) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disclosure of detailed information about financial instruments [abstract]    
Percentage of change in discounted present value of cash flows 10.00%  
Modifications of contractual cash flows of financial assets ¥ 0 ¥ 0
Undiscounted expected credit losses at initial recognition on financial assets ¥ 13,851 ¥ 14,881
Change in market value due to interest rate change threshold percent 0.01%  
Percentage of increase in market interest rates 1.00%  
Percentage of decrease in market interest rates 1.00%