Segment Information (Segment Assets) (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Installment loans |
|
¥ 4,173,582
|
|
¥ 4,081,019
|
|
|
|
| Investment in operating leases |
|
2,152,820
|
|
1,967,178
|
|
|
|
| Investment in securities |
|
3,308,829
|
|
3,234,547
|
|
|
|
| Property under facility operations and servicing assets |
|
779,075
|
|
771,851
|
|
|
|
| Inventories |
|
269,187
|
|
229,229
|
|
|
|
| Equity method investments |
|
1,306,312
|
|
1,320,015
|
|
|
|
| Other assets |
|
2,695,501
|
|
2,226,849
|
|
|
|
| Segment Assets |
|
18,002,776
|
|
16,866,251
|
|
¥ 16,322,100
|
|
| Operating Segment |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
1,247,394
|
|
1,167,339
|
|
1,154,986
|
|
| Installment loans |
|
4,173,584
|
|
4,081,013
|
|
3,958,539
|
|
| Investment in operating leases |
|
2,144,392
|
|
1,958,039
|
|
1,860,556
|
|
| Investment in securities |
|
3,308,392
|
|
3,234,127
|
|
3,262,971
|
|
| Property under facility operations and servicing assets |
|
851,699
|
|
838,424
|
|
759,055
|
|
| Inventories |
|
268,884
|
|
228,997
|
|
227,050
|
|
| Advances for finance lease and operating lease |
|
90,080
|
|
116,873
|
|
130,303
|
|
| Equity method investments |
|
1,305,831
|
|
1,319,707
|
|
1,313,471
|
|
| Advances for property under facility operations |
|
127,900
|
|
78,404
|
|
57,611
|
|
| Goodwill, intangible assets acquired in business combinations |
|
1,301,382
|
[1] |
1,108,962
|
[2] |
1,126,404
|
[3] |
| Other assets |
[4] |
2,615,928
|
|
2,324,742
|
|
2,171,183
|
|
| Segment Assets |
|
17,435,466
|
|
16,456,627
|
|
16,022,129
|
|
| Operating Segment | Corporate Financial Services and Maintenance Leasing |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
577,187
|
|
569,380
|
|
567,735
|
|
| Installment loans |
|
393,442
|
|
424,370
|
|
346,840
|
|
| Investment in operating leases |
|
609,965
|
|
557,625
|
|
535,655
|
|
| Investment in securities |
|
31,876
|
|
29,690
|
|
36,683
|
|
| Property under facility operations and servicing assets |
|
42,088
|
|
43,857
|
|
17,404
|
|
| Inventories |
|
384
|
|
433
|
|
928
|
|
| Advances for finance lease and operating lease |
|
7,106
|
|
6,177
|
|
3,400
|
|
| Equity method investments |
|
8,481
|
|
16,375
|
|
14,984
|
|
| Advances for property under facility operations |
|
5
|
|
143
|
|
0
|
|
| Goodwill, intangible assets acquired in business combinations |
|
24,450
|
[1] |
25,268
|
[2] |
28,693
|
[3] |
| Other assets |
[4] |
181,911
|
|
211,247
|
|
224,998
|
|
| Segment Assets |
|
1,876,895
|
|
1,884,565
|
|
1,777,320
|
|
| Operating Segment | Real Estate |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
38,903
|
|
45,810
|
|
51,978
|
|
| Installment loans |
|
14
|
|
30
|
|
52
|
|
| Investment in operating leases |
|
369,596
|
|
311,377
|
|
278,191
|
|
| Investment in securities |
|
9,363
|
|
6,209
|
|
4,036
|
|
| Property under facility operations and servicing assets |
|
153,861
|
|
175,153
|
|
165,387
|
|
| Inventories |
|
218,937
|
|
182,652
|
|
174,990
|
|
| Advances for finance lease and operating lease |
|
50,332
|
|
78,044
|
|
114,649
|
|
| Equity method investments |
|
214,196
|
|
177,956
|
|
143,751
|
|
| Advances for property under facility operations |
|
8,136
|
|
7,401
|
|
8,183
|
|
| Goodwill, intangible assets acquired in business combinations |
|
48,750
|
[1] |
50,801
|
[2] |
52,898
|
[3] |
| Other assets |
[4] |
123,818
|
|
122,860
|
|
115,972
|
|
| Segment Assets |
|
1,235,906
|
|
1,158,293
|
|
1,110,087
|
|
| Operating Segment | PE Investment And Concession |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
1,510
|
|
1,640
|
|
1,238
|
|
| Installment loans |
|
13,102
|
|
124,411
|
|
115,629
|
|
| Investment in operating leases |
|
45,398
|
|
46,796
|
|
56,286
|
|
| Investment in securities |
|
10,905
|
|
6,117
|
|
36,729
|
|
| Property under facility operations and servicing assets |
|
74,886
|
|
53,832
|
|
41,416
|
|
| Inventories |
|
44,370
|
|
41,021
|
|
47,553
|
|
| Advances for finance lease and operating lease |
|
1
|
|
3
|
|
5
|
|
| Equity method investments |
|
239,127
|
|
148,274
|
|
118,310
|
|
| Advances for property under facility operations |
|
3,996
|
|
728
|
|
4,466
|
|
| Goodwill, intangible assets acquired in business combinations |
|
352,682
|
[1] |
331,003
|
[2] |
351,202
|
[3] |
| Other assets |
[4] |
264,584
|
|
269,119
|
|
293,813
|
|
| Segment Assets |
|
1,050,561
|
|
1,022,944
|
|
1,066,647
|
|
| Operating Segment | Environment and Energy |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
1,638
|
|
2,092
|
|
3,104
|
|
| Installment loans |
|
6,004
|
|
3,609
|
|
2,255
|
|
| Investment in operating leases |
|
241
|
|
237
|
|
250
|
|
| Investment in securities |
|
142,410
|
|
32,032
|
|
571
|
|
| Property under facility operations and servicing assets |
|
496,063
|
|
487,241
|
|
453,252
|
|
| Inventories |
|
3,401
|
|
2,551
|
|
2,463
|
|
| Advances for finance lease and operating lease |
|
0
|
|
0
|
|
0
|
|
| Equity method investments |
|
10,291
|
|
170,946
|
|
219,018
|
|
| Advances for property under facility operations |
|
115,763
|
|
70,081
|
|
44,962
|
|
| Goodwill, intangible assets acquired in business combinations |
|
117,197
|
[1] |
120,743
|
[2] |
121,174
|
[3] |
| Other assets |
[4] |
125,769
|
|
126,643
|
|
129,385
|
|
| Segment Assets |
|
1,018,777
|
|
1,016,175
|
|
976,434
|
|
| Operating Segment | Insurance |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
0
|
|
0
|
|
0
|
|
| Installment loans |
|
15,191
|
|
12,805
|
|
11,792
|
|
| Investment in operating leases |
|
25,457
|
|
26,167
|
|
26,876
|
|
| Investment in securities |
|
2,288,116
|
|
2,234,453
|
|
2,236,495
|
|
| 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 |
|
46,002
|
|
35,865
|
|
29,742
|
|
| Advances for property under facility operations |
|
0
|
|
0
|
|
0
|
|
| Goodwill, intangible assets acquired in business combinations |
|
4,452
|
[1] |
4,452
|
[2] |
4,452
|
[3] |
| Other assets |
[4] |
819,052
|
|
695,492
|
|
612,570
|
|
| Segment Assets |
|
3,198,270
|
|
3,009,234
|
|
2,921,927
|
|
| Operating Segment | Banking and credit |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
0
|
|
0
|
|
0
|
|
| Installment loans |
|
2,685,320
|
|
2,511,736
|
|
2,378,183
|
|
| Investment in operating leases |
|
0
|
|
0
|
|
0
|
|
| Investment in securities |
|
166,331
|
|
305,441
|
|
311,237
|
|
| 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 |
|
44,544
|
|
43,934
|
|
43,601
|
|
| Advances for property under facility operations |
|
0
|
|
0
|
|
0
|
|
| Goodwill, intangible assets acquired in business combinations |
|
0
|
[1] |
0
|
[2] |
0
|
[3] |
| Other assets |
[4] |
340,604
|
|
283,460
|
|
201,196
|
|
| Segment Assets |
|
3,236,799
|
|
3,144,571
|
|
2,934,217
|
|
| Operating Segment | Aircraft and Ships |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
12,372
|
|
0
|
|
0
|
|
| Installment loans |
|
17,078
|
|
36,119
|
|
60,468
|
|
| Investment in operating leases |
|
590,639
|
|
599,813
|
|
557,867
|
|
| Investment in securities |
|
2,217
|
|
9,387
|
|
11,960
|
|
| Property under facility operations and servicing assets |
|
24
|
|
28
|
|
0
|
|
| Inventories |
|
826
|
|
1,588
|
|
733
|
|
| Advances for finance lease and operating lease |
|
28,431
|
|
27,816
|
|
9,232
|
|
| Equity method investments |
|
410,193
|
|
402,567
|
|
399,061
|
|
| Advances for property under facility operations |
|
0
|
|
0
|
|
0
|
|
| Goodwill, intangible assets acquired in business combinations |
|
55,804
|
[1] |
43,024
|
[2] |
19,114
|
[3] |
| Other assets |
[4] |
93,751
|
|
111,631
|
|
111,206
|
|
| Segment Assets |
|
1,211,335
|
|
1,231,973
|
|
1,169,641
|
|
| Operating Segment | ORIX USA |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
433
|
|
451
|
|
505
|
|
| Installment loans |
|
757,103
|
|
652,805
|
|
699,384
|
|
| Investment in operating leases |
|
39,605
|
|
21,260
|
|
9,858
|
|
| Investment in securities |
|
503,966
|
|
487,022
|
|
509,172
|
|
| Property under facility operations and servicing assets |
|
82,749
|
|
76,469
|
|
79,747
|
|
| Inventories |
|
699
|
|
137
|
|
159
|
|
| Advances for finance lease and operating lease |
|
0
|
|
0
|
|
0
|
|
| Equity method investments |
|
65,577
|
|
54,817
|
|
61,415
|
|
| Advances for property under facility operations |
|
0
|
|
0
|
|
0
|
|
| Goodwill, intangible assets acquired in business combinations |
|
297,167
|
[1] |
171,884
|
[2] |
176,785
|
[3] |
| Other assets |
[4] |
193,172
|
|
129,094
|
|
157,459
|
|
| Segment Assets |
|
1,940,471
|
|
1,593,939
|
|
1,694,484
|
|
| 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 |
|
114,919
|
|
86,008
|
|
82,568
|
|
| 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 |
|
6,005
|
|
8,578
|
|
11,907
|
|
| Advances for property under facility operations |
|
0
|
|
0
|
|
0
|
|
| Goodwill, intangible assets acquired in business combinations |
|
393,782
|
[1] |
354,801
|
[2] |
364,773
|
[3] |
| Other assets |
[4] |
286,469
|
|
219,919
|
|
202,891
|
|
| Segment Assets |
|
801,175
|
|
669,306
|
|
662,139
|
|
| Operating Segment | Asia and Australia |
|
|
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
|
|
| Net investment in leases |
|
615,351
|
|
547,966
|
|
530,426
|
|
| Installment loans |
|
286,330
|
|
315,128
|
|
343,936
|
|
| Investment in operating leases |
|
463,491
|
|
394,764
|
|
395,573
|
|
| Investment in securities |
|
38,289
|
|
37,768
|
|
33,520
|
|
| Property under facility operations and servicing assets |
|
2,028
|
|
1,844
|
|
1,849
|
|
| Inventories |
|
267
|
|
615
|
|
224
|
|
| Advances for finance lease and operating lease |
|
4,210
|
|
4,833
|
|
3,017
|
|
| Equity method investments |
|
261,415
|
|
260,395
|
|
271,682
|
|
| Advances for property under facility operations |
|
0
|
|
51
|
|
0
|
|
| Goodwill, intangible assets acquired in business combinations |
|
7,098
|
[1] |
6,986
|
[2] |
7,313
|
[3] |
| Other assets |
[4] |
186,798
|
|
155,277
|
|
121,693
|
|
| Segment Assets |
|
¥ 1,865,277
|
|
¥ 1,725,627
|
|
¥ 1,709,233
|
|
|
|