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 | |||
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Mar. 31, 2025 |
Mar. 31, 2024 |
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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 | ||
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