Key Financial Data Of Group
| Concept | As at 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | As at 2024-09-30 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | As at 2023-09-30 | 2022-04-01 to 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2022-09-30 | 2022-04-01 to 2022-09-30 | As at 2022-09-30 | 2022-04-01 to 2022-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key financial data of group | ||||||||||||||||||||
| Business results of group | ||||||||||||||||||||
| Operating revenue | — | 
                                                4,029,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,469,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                3,311,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,246,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Ordinary income | — | — | 
                                                96,574,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                182,058,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                95,714,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                148,759,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                77,709,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                3,454,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,418,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,868,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                17,692,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,775,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,444,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                25,048,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,772,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,382,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | — | — | 
                                                14,651,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                21,203,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                13,810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                17,768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                12,370,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | — | — | 
                                                -3,041,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                94,399,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                24,664,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -10,643,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -27,249,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                492,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                319,975,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                499,902,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                321,160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                323,738,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                437,999,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                323,632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                415,949,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                323,217,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                404,029,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                10,752,912,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                324,102,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,138,009,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                325,444,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                325,067,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,760,880,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                325,026,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,518,089,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                324,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,970,337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets per share | 
                                                5,647.83
                                                
                                             | — | — | — | — | — | 
                                                5,706.68
                                                
                                             | — | — | — | — | 
                                                4,870.27
                                                
                                             | — | — | 
                                                9,257.21
                                                
                                             | — | — | — | 
                                                8,784.96
                                                
                                             | — | 
| Basic earnings (loss) per share | — | — | 
                                                167.38
                                                
                                             | — | — | 
                                                237.35
                                                
                                             | — | — | — | 
                                                153.62
                                                
                                             | — | — | — | — | — | 
                                                391.79
                                                
                                             | — | — | — | 
                                                272.46
                                                
                                             | 
| Diluted earnings per share | — | — |  | — | — |  | — | — | — |  | — | — | — | — | — |  | — | — | — |  | 
| Equity-to-asset ratio | 
                                                0.0457
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.9872
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0448
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.9868
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.9959
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0407
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.9957
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0395
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.9958
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.0400
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                -342,765,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                294,419,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                86,589,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -338,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -793,772,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) investing activities | — | — | 
                                                238,053,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -90,170,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                217,444,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -380,777,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,807,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -4,643,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -10,509,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -2,677,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -8,049,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -2,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and cash equivalents | 
                                                2,114,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                2,223,711,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,331,328,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,029,972,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,962,559,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Number of employees | 
                                                3,582
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                11
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                3,549
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                3,662
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                3,463
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                3,589
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Average number of temporary employees | 
                                                585
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                626
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                633
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                669
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                689
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |