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v3.24.1.1.u2

Investment in Securities (Summary of Investment in Securities) (Parenthetical) (Detail) - JPY (¥) ¥ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023
Schedule of Investments [Line Items] |  |  |
Equity securities |  | ¥ 35,696 | ¥ 25,386
Equity securities | [1] | 597,601 | 500,832
Held-to-maturity debt securities | [2] | 0 | 114,759
Revision of Prior Period, Adjustment [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Held-to-maturity debt securities |  | 115,507 |
Unrealized gain (loss) on investments |  | 7,913 |
Investment Funds Elected for Fair Value Option |  |  |
Schedule of Investments [Line Items] |  |  |
Equity securities |  | 26,945 | 18,544
Variable Annuity and Variable Life Insurance Contracts |  |  |
Schedule of Investments [Line Items] |  |  |
Equity securities |  | ¥ 161,244 | ¥ 151,445
[1] | The amount of assets under management of variable annuity and variable life insurance contracts included in equity securities were ¥151,445 million and ¥161,244 million as of March 31, 2023 and 2024, respectively. The amount of investment funds and others elected the fair value option included in equity securities were ¥18,544 million and ¥26,945 million as of March 31, 2023 and 2024, respectively.
[2] | 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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