Deposits (Narrative) (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Deposits [Line Items] | ||
| Time deposits, including certificates of deposits ("CDs"), issued in amount of JPY10 million or more, Domestic deposits | ¥ 69,396,042 | ¥ 66,448,281 |
| Minimum | ||
| Deposits [Line Items] | ||
| Issue amount of domestic time deposits in Japanese Yen | ¥ 10 |