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Equity Method Investments (Tables) | 6 Months Ended
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Sep. 30, 2025
Equity Method Investments and Joint Ventures [Abstract] |
Summary of equity method investments | Equity method investments at March 31, 2025 and September 30, 2025 consists of the following:
|  | Millions of yen |
| March 31, 2025 |  |  | September 30, 2025 |
Investment in corporate entities |  | ¥ | 973,795 |  |  | ¥ | 825,879 |
Investment in real estate joint ventures |  |  | 137,274 |  |  |  | 144,363 |
Investment in partnerships and other investments |  |  | 208,946 |  |  |  | 270,437 |
|  | ¥ | 1,320,015 |  |  | ¥ | 1,240,679 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
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