v3.26.1
Financial Assets at Fair Value through Profit or Loss - Summary of Financial Assets at Fair Value through Profit or Loss (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Disclosure of financial assets [line items]    
Financial assets at fair value through profit or loss ¥ 2,705,113 ¥ 2,902,969
Debt instruments [member]    
Disclosure of financial assets [line items]    
Financial assets at fair value through profit or loss 2,620,759 2,820,665
Equity instruments [member]    
Disclosure of financial assets [line items]    
Financial assets at fair value through profit or loss ¥ 84,354 ¥ 82,304