v3.26.1
Related party transactions - Summary of Compensation for Key Management Personnel (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure Of Key Management Personnel Compensation [Abstract]      
Short-term employee benefits ¥ 1,908 ¥ 1,657 ¥ 1,660
Stock-based compensation 4,254 4,431 2,917
Total ¥ 6,162 ¥ 6,088 ¥ 4,577