Financial instruments - Summary of Significant Marketable Equity Instruments Measured at Fair Value Through Other Comprehensive Income (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| KADOKAWA Corporation [Member] | ||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | ||
| Marketable equity instruments measured at fair value through other comprehensive income | ¥ 62,200 | ¥ 52,951 |
| ANYCOLOR Inc. [Member] | ||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | ||
| Marketable equity instruments measured at fair value through other comprehensive income | 9,706 | 10,815 |
| Bandai Namco Holdings Inc. | ||
| Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items] | ||
| Marketable equity instruments measured at fair value through other comprehensive income | ¥ 61,872 | ¥ 0 |