v3.25.2
Financial instruments - Summary of Information Relating to Derecognized Equity Instruments Measured at Fair Value Through Other Comprehensive Income by Way of Sale (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disclosure of Detailed Information Realting to Equity Instruments Measured to Fair Value Through Other Comphrehensive Income Derecognized Explanatory [Abstract]    
Fair value at derecognition ¥ 32,275 ¥ 86,265
Cumulative amount recognized in other comprehensive income, net of tax [1] (29,508) 12,326
Dividend received ¥ 0 ¥ 122
[1] The cumulative amount recognized in other comprehensive income, net of tax, was transferred to retained earnings upon derecognition of the equity instruments.