v3.25.2
Investments Accounted for Using the Equity Method - Summary of Investments in Equity Accounted Investees (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Text block 1 [Abstract]      
Associates ¥ 4,887,674 ¥ 4,616,598  
Joint ventures 910,377 1,093,508  
Total ¥ 5,798,051 ¥ 5,710,106 ¥ 5,227,345