v3.25.2
Inventories - Summary of Inventories (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2025
Mar. 31, 2024
Text block 1 [Abstract]    
Products ¥ 2,875,405 ¥ 2,796,831
Work in process 486,552 496,471
Raw materials 1,013,621 1,117,950
Supplies and other 222,654 194,116
Total ¥ 4,598,232 ¥ 4,605,368