Property, Plant and Equipment - Schedule of Impairment Losses (Details) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Disclosure of detailed information about property, plant and equipment [line items] | |||
| Cost of sales | ¥ (1,580,217) | ¥ (1,426,678) | ¥ (1,244,072) |
| Research and development expenses | (730,227) | (729,924) | (633,325) |
| Accumulated impairment losses | |||
| Disclosure of detailed information about property, plant and equipment [line items] | |||
| Cost of sales | (1,485) | (6,225) | (375) |
| Selling, general and administrative expenses | (34) | 0 | (75) |
| Research and development expenses | (1) | (1,307) | 0 |
| Other operating expenses | (3,257) | (7,923) | (1,881) |
| Total | ¥ (4,778) | ¥ (15,454) | ¥ (2,331) |