v3.26.1
Supplemental consolidated statements of income information - Additional information (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Material income and expense [abstract]      
Research and development expense ¥ 762,027 ¥ 734,578 ¥ 742,772
Advertising expense 440,073 413,795 422,655
Shipping and handling costs for finished goods ¥ 79,462 ¥ 86,762 ¥ 85,108