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Segment Information (Segment Assets) (Detail) - JPY (¥) ¥ in Millions | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Installment loans | ¥ 4,081,019 | ¥ 3,958,814 |
Investment in operating leases | 1,967,178 | 1,868,574 |
Investment in securities | 3,234,547 | 3,263,079 |
Property under facility operations and servicing assets | 771,851 | 689,573 |
Inventories | 229,229 | 227,359 |
Equity method investments | 1,320,015 | 1,313,887 |
Other assets | 2,226,849 | 2,068,768 |
Segment Assets | 16,866,251 | 16,322,100 | ¥ 15,289,385
Operating Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 1,167,339 | 1,154,986 | 1,087,380
Installment loans | 4,081,013 | 3,958,539 | 3,904,679
Investment in operating leases | 1,958,039 | 1,860,556 | 1,523,608
Investment in securities | 3,234,127 | 3,262,971 | 2,850,282
Property under facility operations and servicing assets | 838,424 | 759,055 | 685,829
Inventories | 228,997 | 227,050 | 168,824
Advances for finance lease and operating lease | 116,873 | 130,303 | 118,264
Equity method investments | 1,319,707 | 1,313,471 | 1,061,986
Advances for property under facility operations | 78,404 | 57,611 | 97,472
Goodwill, intangible assets acquired in business combinations | 1,108,962 | 1,126,404 | 1,097,664
Other assets | 2,324,742 | 2,171,183 | 2,107,824
Segment Assets | 16,456,627 | 16,022,129 | 14,703,812
Operating Segment | Corporate Financial Services and Maintenance Leasing |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 569,380 | 567,735 | 566,010
Installment loans | 424,370 | 346,840 | 338,361
Investment in operating leases | 557,625 | 535,655 | 511,184
Investment in securities | 29,690 | 36,683 | 34,270
Property under facility operations and servicing assets | 43,857 | 17,404 | 18,908
Inventories | 433 | 928 | 1,104
Advances for finance lease and operating lease | 6,177 | 3,400 | 1,566
Equity method investments | 16,375 | 14,984 | 13,416
Advances for property under facility operations | 143 | 0 | 0
Goodwill, intangible assets acquired in business combinations | 25,268 | 28,693 | 29,251
Other assets | 211,247 | 224,998 | 249,897
Segment Assets | 1,884,565 | 1,777,320 | 1,763,967
Operating Segment | Real Estate |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 45,810 | 51,978 | 57,587
Installment loans | 30 | 52 | 0
Investment in operating leases | 311,377 | 278,191 | 302,698
Investment in securities | 6,209 | 4,036 | 3,894
Property under facility operations and servicing assets | 175,153 | 165,387 | 170,425
Inventories | 182,652 | 174,990 | 108,789
Advances for finance lease and operating lease | 78,044 | 114,649 | 112,973
Equity method investments | 177,956 | 143,751 | 117,040
Advances for property under facility operations | 7,401 | 8,183 | 6,625
Goodwill, intangible assets acquired in business combinations | 50,801 | 52,898 | 54,996
Other assets | 122,860 | 115,972 | 114,153
Segment Assets | 1,158,293 | 1,110,087 | 1,049,180
Operating Segment | PE Investment And Concession |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 1,640 | 1,238 | 1,616
Installment loans | 124,411 | 115,629 | 14,225
Investment in operating leases | 46,796 | 56,286 | 52,976
Investment in securities | 6,117 | 36,729 | 36,058
Property under facility operations and servicing assets | 53,832 | 41,416 | 51,978
Inventories | 41,021 | 47,553 | 48,716
Advances for finance lease and operating lease | 3 | 5 | 4
Equity method investments | 148,274 | 118,310 | 28,796
Advances for property under facility operations | 728 | 4,466 | 2,354
Goodwill, intangible assets acquired in business combinations | 331,003 | 351,202 | 368,748
Other assets | 269,119 | 293,813 | 264,395
Segment Assets | 1,022,944 | 1,066,647 | 869,866
Operating Segment | Environment and Energy |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 2,092 | 3,104 | 6,723
Installment loans | 3,609 | 2,255 | 2,138
Investment in operating leases | 237 | 250 | 264
Investment in securities | 32,032 | 571 | 1,580
Property under facility operations and servicing assets | 487,241 | 453,252 | 362,043
Inventories | 2,551 | 2,463 | 9,825
Advances for finance lease and operating lease | 0 | 0 | 1
Equity method investments | 170,946 | 219,018 | 188,436
Advances for property under facility operations | 70,081 | 44,962 | 88,493
Goodwill, intangible assets acquired in business combinations | 120,743 | 121,174 | 114,114
Other assets | 126,643 | 129,385 | 115,912
Segment Assets | 1,016,175 | 976,434 | 889,529
Operating Segment | Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 0 | 0 | 0
Installment loans | 12,805 | 11,792 | 18,109
Investment in operating leases | 26,167 | 26,876 | 27,467
Investment in securities | 2,234,453 | 2,236,495 | 1,982,573
Property under facility operations and servicing assets | 0 | 0 | 0
Inventories | 0 | 0 | 0
Advances for finance lease and operating lease | 0 | 0 | 0
Equity method investments | 35,865 | 29,742 | 17,577
Advances for property under facility operations | 0 | 0 | 0
Goodwill, intangible assets acquired in business combinations | 4,452 | 4,452 | 4,686
Other assets | 695,492 | 612,570 | 595,793
Segment Assets | 3,009,234 | 2,921,927 | 2,646,205
Operating Segment | Banking and credit |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 0 | 0 | 0
Installment loans | 2,511,736 | 2,378,183 | 2,395,340
Investment in operating leases | 0 | 0 | 0
Investment in securities | 305,441 | 311,237 | 289,621
Property under facility operations and servicing assets | 0 | 0 | 0
Inventories | 0 | 0 | 9
Advances for finance lease and operating lease | 0 | 0 | 0
Equity method investments | 43,934 | 43,601 | 2,006
Advances for property under facility operations | 0 | 0 | 0
Goodwill, intangible assets acquired in business combinations | 0 | 0 | 11,771
Other assets | 283,460 | 201,196 | 255,038
Segment Assets | 3,144,571 | 2,934,217 | 2,953,785
Operating Segment | Aircraft and Ships |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 0 | 0 | 0
Installment loans | 36,119 | 60,468 | 75,914
Investment in operating leases | 599,813 | 557,867 | 295,858
Investment in securities | 9,387 | 11,960 | 5,112
Property under facility operations and servicing assets | 28 | 0 | 0
Inventories | 1,588 | 733 | 37
Advances for finance lease and operating lease | 27,816 | 9,232 | 0
Equity method investments | 402,567 | 399,061 | 347,508
Advances for property under facility operations | 0 | 0 | 0
Goodwill, intangible assets acquired in business combinations | 43,024 | 19,114 | 18,461
Other assets | 111,631 | 111,206 | 66,053
Segment Assets | 1,231,973 | 1,169,641 | 808,943
Operating Segment | ORIX USA |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 451 | 505 | 483
Installment loans | 652,805 | 699,384 | 747,783
Investment in operating leases | 21,260 | 9,858 | 3,612
Investment in securities | 487,022 | 509,172 | 384,082
Property under facility operations and servicing assets | 76,469 | 79,747 | 81,291
Inventories | 137 | 159 | 142
Advances for finance lease and operating lease | 0 | 0 | 0
Equity method investments | 54,817 | 61,415 | 87,513
Advances for property under facility operations | 0 | 0 | 0
Goodwill, intangible assets acquired in business combinations | 171,884 | 176,785 | 157,811
Other assets | 129,094 | 157,459 | 162,167
Segment Assets | 1,593,939 | 1,694,484 | 1,624,884
Operating Segment | ORIX Europe |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 0 | 0 | 0
Installment loans | 0 | 0 | 0
Investment in operating leases | 0 | 0 | 0
Investment in securities | 86,008 | 82,568 | 76,648
Property under facility operations and servicing assets | 0 | 0 | 0
Inventories | 0 | 0 | 0
Advances for finance lease and operating lease | 0 | 0 | 0
Equity method investments | 8,578 | 11,907 | 10,213
Advances for property under facility operations | 0 | 0 | 0
Goodwill, intangible assets acquired in business combinations | 354,801 | 364,773 | 331,080
Other assets | 219,919 | 202,891 | 194,943
Segment Assets | 669,306 | 662,139 | 612,884
Operating Segment | Asia and Australia |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment in leases | 547,966 | 530,426 | 454,961
Installment loans | 315,128 | 343,936 | 312,809
Investment in operating leases | 394,764 | 395,573 | 329,549
Investment in securities | 37,768 | 33,520 | 36,444
Property under facility operations and servicing assets | 1,844 | 1,849 | 1,184
Inventories | 615 | 224 | 202
Advances for finance lease and operating lease | 4,833 | 3,017 | 3,720
Equity method investments | 260,395 | 271,682 | 249,481
Advances for property under facility operations | 51 | 0 | 0
Goodwill, intangible assets acquired in business combinations | 6,986 | 7,313 | 6,746
Other assets | 155,277 | 121,693 | 89,473
Segment Assets | ¥ 1,725,627 | ¥ 1,709,233 | ¥ 1,484,569

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