v3.26.3
Segment information (Segment Assets) (Parenthetical) (Detail) - USA & Europe - JPY (¥)
¥ in Millions
Sep. 30, 2026
Mar. 31, 2026
Segment Reporting Information [Line Items]    
Goodwill and intangible assets acquired in business combination attributed to non controlling interest ¥ 7,070 ¥ 7,196
Goodwill and intangible assets attributed to redeemable non controlling interest ¥ 44,566 ¥ 47,981