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Schedule II.-Valuation and Qualifying Accounts and Reserves (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Restructuring cost      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period ¥ 2,850 ¥ 252 ¥ 690
Acquisitions 0 0 0
Addition: Charged to costs and expenses 0 2,781 0
Deduction (2,373) (187) (474)
Translation adjustment 3 4 36
Balance at end of period 480 2,850 252
Restructuring cost | Severance and other benefits to terminated employees      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 2,850 252 690
Acquisitions 0 0 0
Addition: Charged to costs and expenses 0 2,781 0
Deduction (2,373) (187) (474)
Translation adjustment 3 4 36
Balance at end of period 480 2,850 252
Valuation Allowance of Deferred Tax Assets      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 35,155 21,560 15,369
Acquisitions 143 1,403 805
Addition: Charged to costs and expenses 4,123 13,414 7,458
Deduction [1] (2,814) (2,445) (2,487)
Other [2] 680 1,223 415
Balance at end of period ¥ 37,287 ¥ 35,155 ¥ 21,560
[1] The amount of deduction includes benefits recognized in earnings, expiration of loss carryforwards and sales of subsidiaries. The amounts of benefits recognized in earnings were ¥553 million in fiscal 2021, ¥1,742 million in fiscal 2022 and ¥1,465 million in fiscal 2023.
[2] The amount of other includes translation adjustment and the effect of changes in statutory tax rate.