Supplemental consolidated statements of income information - Summary of other operating expense (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Statements [Line Items]
(Gain) loss on purchase/sale of interests in subsidiaries and associates, net		¥ (4,593)	¥ (18,868)
(Gain) loss on sale, disposal or impairment of assets, net	[1]	8,316	32,122
Other		803	996
Total		(65,494)	¥ 14,250
GSN Games Shares
Statements [Line Items]
Gain on transfer of GSN Games shares	[2]	¥ (70,020)

[1] Refer to Notes 9 and 11.

[2] Refer to Note 31.