Financial Instruments - Transfers of Financial Assets Not Meet Requirements for Derecognition - Additional Information (Details) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Other Financial Liabilities | ||
| Disclosure of financial assets [line items] | ||
| Financial liabilities | ¥ 1,694 | ¥ 3,269 |
| Borrowings | ||
| Disclosure of financial assets [line items] | ||
| Financial liabilities | 160,000 | 70,000 |
| Account receivables | ||
| Disclosure of financial assets [line items] | ||
| Financial assets | 20,494 | 21,615 |
| Loans and Advances to Customers | ||
| Disclosure of financial assets [line items] | ||
| Financial assets | 7,133 | ¥ 1,144 |
| Securities | ||
| Disclosure of financial assets [line items] | ||
| Financial assets | 111,360 | |
| Transfers of Securities | Borrowings | ||
| Disclosure of financial assets [line items] | ||
| Financial liabilities | ¥ 108,981 |