Summary of Material Accounting Policies - Summary of Right-of-use assets (Detail) |
12 Months Ended |
|---|---|
Mar. 31, 2025 | |
| Leasehold land | Bottom of range [member] | |
| Disclosure of quantitative information about right-of-use assets [line items] | |
| Right-of-use assets | 13 years |
| Leasehold land | Top of range [member] | |
| Disclosure of quantitative information about right-of-use assets [line items] | |
| Right-of-use assets | 35 years |
| Building | Bottom of range [member] | |
| Disclosure of quantitative information about right-of-use assets [line items] | |
| Right-of-use assets | 3 years |
| Building | Top of range [member] | |
| Disclosure of quantitative information about right-of-use assets [line items] | |
| Right-of-use assets | 5 years |