The amount of treasury stock cancelled during the period. [Refer: Treasury shares]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The increase (decrease) in the number of shares outstanding. [Refer: Number of shares outstanding]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The increase in equity through the issue of equity instruments.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

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The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares]

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[Line Items] for Equity [Table]

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Purchase Of Treasury Shares, Shares

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Sale Of Treasury Shares, Shares

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Equity and Other Equity Items - Narrative (Details) - JPY (¥) shares in Thousands, ¥ in Millions	12 Months Ended			13 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023	Apr. 30, 2025
Equity [Line Items]
Number of shares outstanding	1,590,950	1,582,419	1,582,296
Disposal of treasury shares	¥ 0	¥ 1	¥ 1
Issue of equity	36,178	502	164
Acquisition of treasury shares	51,925	2,367	¥ 27,065
Equity-Settled LTIP
Equity [Line Items]
Disposal of treasury shares	¥ 24,999	¥ 47,614
Board of Directors resolution
Equity [Line Items]
Treasury shares acquired (in shares)		11,544		23,367
Treasury shares \| Equity-Settled LTIP
Equity [Line Items]
Increase (decrease) in number of shares outstanding (in shares)	(7,327)	(13,958)
Ordinary shares \| Equity-Settled LTIP
Equity [Line Items]
Increase (decrease) in number of shares outstanding (in shares)	8,519
ESOP and BIP Trust
Equity [Line Items]
Treasury shares acquired (in shares)	460	520
Number of treasury shares sold (in shares)	783	847
Treasury shares
Equity [Line Items]
Number of shares outstanding	17,300	13,405	27,767
Disposal of treasury shares	¥ 0	¥ 0	¥ 0
Acquisition of treasury shares	¥ 51,905	2,367	¥ 27,060
Treasury shares \| Board of Directors resolution
Equity [Line Items]
Acquisition of treasury shares		¥ 49,978		¥ 99,956
Treasury shares \| ESOP and BIP Trust
Equity [Line Items]
Number of shares outstanding	5,565	5,888	6,215
Share capital
Equity [Line Items]
Issue of equity	¥ 18,089	¥ 251	¥ 82
Share capital \| Equity-Settled LTIP
Equity [Line Items]
Issue of equity	18,064
Share premium
Equity [Line Items]
Disposal of treasury shares	0	0	0
Issue of equity	18,089	¥ 251	82
Acquisition of treasury shares	20		¥ 5
Share premium \| Equity-Settled LTIP
Equity [Line Items]
Issue of equity	¥ 18,064