Income taxes - Summary a Reconciliation of the Differences Between the Japanese Statutory Tax Rate and the Effective Tax Rate (Detail) |
12 Months Ended | ||
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Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Reconciliation of average effective tax rate and applicable tax rate [abstract] | |||
| Statutory tax rate | 31.50% | 31.50% | 31.50% |
| Non-deductible expenses | 0.60% | 0.40% | 0.30% |
| Income tax credits | (2.20%) | (1.50%) | (3.80%) |
| Change in statutory tax rate | 0.00% | 0.00% | 0.10% |
| Change in unrecognized deferred tax assets | 0.20% | (5.70%) | (2.50%) |
| Change in deferred tax liabilities on undistributed earnings of foreign subsidiaries and affiliates | 0.60% | 0.40% | 1.00% |
| Foreign income tax differential | (4.60%) | (6.50%) | (5.60%) |
| Recording or reversal of liabilities for uncertain tax positions | (0.50%) | 0.10% | 0.20% |
| Controlled Foreign Company taxation in Japan | 0.10% | 0.10% | 0.10% |
| Other | 0.10% | 0.40% | 0.50% |
| Effective income tax rate | 25.80% | 19.20% | 21.80% |
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Tax rate effects, in aggregate, on the reconciliation between the average effective tax rate and the applicable tax rate that the entity does not separately disclose in the reconciliation. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from a change in tax rate. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the expenses not deductible in determining taxable profit. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the application of foreign tax rates. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Tax rate effect of change in deferred tax liabilities on undistributed earnings of foreign subsidiaries and affiliates. No definition available.
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- Definition Tax rate effect of change in unrecognized deferred tax assets. No definition available.
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- Definition Tax rate effect of income tax credits. No definition available.
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- Definition Tax rate effect of japan controlled foreign company taxation. No definition available.
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- Definition Tax rate effect of reversal of uncertain tax positions. No definition available.
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