v3.26.1
Goodwill and Intangible Assets - Additional Information (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Line Items]      
Intangible assets amortization expense recognized ¥ 8,178 ¥ 9,025 ¥ 8,557