v3.26.1
Schedule II.-Valuation and Qualifying Accounts and Reserves (Detail) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Restructuring cost      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period ¥ 49 ¥ 145 ¥ 480
Acquisitions 0 0 0
Addition: Charged to costs and expenses 323 49 145
Deduction (38) (145) (480)
Translation adjustment 0 0 0
Balance at end of period 334 49 145
Restructuring cost | Closed office lease obligations      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 49 23 0
Acquisitions 0 0 0
Addition: Charged to costs and expenses 0 49 23
Deduction (38) (23) 0
Translation adjustment 0 0 0
Balance at end of period 11 49 23
Restructuring cost | Severance and other benefits to terminated employees      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 0 122 480
Acquisitions 0 0 0
Addition: Charged to costs and expenses 323 0 122
Deduction 0 (122) (480)
Translation adjustment 0 0 0
Balance at end of period 323 0 122
Valuation Allowance of Deferred Tax Assets      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period 35,845 39,046 37,287
Acquisitions 37 0 0
Addition: Charged to costs and expenses 11,873 8,481 12,714
Deduction [1] (3,369) (15,572) (12,233)
Other [2] (124) 3,890 1,278
Balance at end of period ¥ 44,262 ¥ 35,845 ¥ 39,046
[1] The amount of deduction includes benefits recognized in income tax expense, expiration of loss carryforwards and sales of subsidiaries. The amounts of benefits recognized in earnings due to the utilization of net operation loss carry forwards were ¥3,660 million in fiscal 2024, ¥3,380 million in fiscal 2025 and ¥1,877 million in fiscal 2026. The remaining amounts of benefits recognized in earnings were ¥3,613 million in fiscal 2024, ¥3,128 million in fiscal 2025 and ¥812 million in fiscal 2026.
[2] The amount of other includes translation adjustment and the effect of changes in statutory tax rate.