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v3.24.1.1.u2

Investment in Securities (Amortized Cost Basis Amounts, Gross Unrealized Holding Gains, Gross Unrealized Holding Losses and Fair Values of Available-for-Sale Securities and Held-to-Maturity Securities in Each Major Security Type) (Detail) - JPY (¥) ¥ in Millions | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | --- | ---
Schedule of Investments [Line Items] |  |  |  |
Available-for-sale debt securities, Amortized cost |  | ¥ 3,015,940 | ¥ 2,488,858 |
Available-for-sale debt securities, Allowance for credit losses |  | (634) | (144) | ¥ (153)
Available-for-sale debt securities, Gross unrealized gains |  | 41,989 | 16,076 |
Available-for-sale debt securities, Gross unrealized losses |  | (391,817) | (270,182) |
Available-for-sale debt securities, Fair value |  | 2,665,478 | 2,234,608 |
Held-to-maturity securities, Amortized cost | [1] | 0 | 114,759 |
Total amortized cost |  |  | 2,603,617 |
Total allowance for credit losses |  |  | (144) |
Total gross unrealized gains |  |  | 30,995 |
Total gross unrealized losses |  |  | (270,182) |
Total fair values |  |  | 2,364,286 |
Japanese and foreign government bond securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Available-for-sale debt securities, Amortized cost |  | 1,299,025 | 962,969 |
Available-for-sale debt securities, Allowance for credit losses |  | 0 | 0 |
Available-for-sale debt securities, Gross unrealized gains |  | 11,526 | 2,863 |
Available-for-sale debt securities, Gross unrealized losses |  | (275,637) | (164,537) |
Available-for-sale debt securities, Fair value |  | 1,034,914 | 801,295 |
Japanese prefectural and foreign municipal bond securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Available-for-sale debt securities, Amortized cost |  | 425,426 | 389,150 |
Available-for-sale debt securities, Allowance for credit losses |  | (248) | (144) |
Available-for-sale debt securities, Gross unrealized gains |  | 2,623 | 1,146 |
Available-for-sale debt securities, Gross unrealized losses |  | (26,336) | (20,906) |
Available-for-sale debt securities, Fair value |  | 401,465 | 369,246 |
Corporate debt securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Available-for-sale debt securities, Amortized cost |  | 905,706 | 851,525 |
Available-for-sale debt securities, Allowance for credit losses |  | 0 | 0 |
Available-for-sale debt securities, Gross unrealized gains |  | 21,415 | 6,270 |
Available-for-sale debt securities, Gross unrealized losses |  | (82,542) | (73,407) |
Available-for-sale debt securities, Fair value |  | 844,579 | 784,388 |
CMBS and RMBS in the Americas |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Available-for-sale debt securities, Amortized cost |  | 88,586 | 45,292 |
Available-for-sale debt securities, Allowance for credit losses |  | 0 | 0 |
Available-for-sale debt securities, Gross unrealized gains |  | 929 | 62 |
Available-for-sale debt securities, Gross unrealized losses |  | (1,775) | (2,181) |
Available-for-sale debt securities, Fair value |  | 87,740 | 43,173 |
Other asset-backed securities and debt securities |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Available-for-sale debt securities, Amortized cost |  | 297,197 | 239,922 |
Available-for-sale debt securities, Allowance for credit losses |  | (386) | 0 |
Available-for-sale debt securities, Gross unrealized gains |  | 5,496 | 5,735 |
Available-for-sale debt securities, Gross unrealized losses |  | (5,527) | (9,151) |
Available-for-sale debt securities, Fair value |  | ¥ 296,780 | 236,506 |
Japanese government bond securities and other |  |  |  |
Schedule of Investments [Line Items] |  |  |  |
Held-to-maturity securities, Amortized cost |  |  | 114,759 |
Held-to-maturity securities, Allowance for credit losses |  |  | 0 |
Held-to-maturity securities, Gross unrealized gains |  |  | 14,919 |
Held-to-maturity securities, Gross unrealized losses |  |  | 0 |
Held-to-maturity securities, Fair value |  |  | ¥ 129,678 |
[1] | During fiscal 2024, bonds held as held-to-maturity debt securities were reclassified to available-for-sale debt securities. This is because a certain subsidiary changed its holding purposes in accordance with ASC 320 (“Investments—Debt Securities”) in order to improve profitability by building a flexible investment portfolio and improve capital stability. At the time of reclassification, the book value of held-to-maturity debt securities was ¥115,507 million and the related unrealized gain was ¥7,913 million.

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