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v3.23.2

Investment in Securities (Summary of Contractual Maturities of Available-for-Sale Debt Securities and Held-to-Maturity Debt Securities) (Detail) - JPY (¥) ¥ in Millions | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | ---
Available-for-sale debt securities, amortized cost |  |
Due within one year | ¥ 75,103 |
Due after one to five years | 305,405 |
Due after five to ten years | 378,144 |
Due after ten years | 1,730,206 |
Available-for-sale debt securities, Amortized cost | 2,488,858 | ¥ 2,276,425
Available-for-sale debt securities, fair value |  |
Due within one year | 75,662 |
Due after one to five years | 305,832 |
Due after five to ten years | 364,070 |
Due after ten years | 1,489,044 |
Available-for-sale debt securities | 2,234,608 | 2,174,891
Held-to-maturity debt securities, amortized cost |  |
Due after five to ten years | 28,658 |
Due after ten years | 86,101 |
Held-to-maturity securities, Amortized cost | 114,759 | ¥ 114,312
Held-to-maturity debt securities, fair value |  |
Due after five to ten years | 32,204 |
Due after ten years | 97,474 |
Held-to-maturity securities, fair value | ¥ 129,678 |

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