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 | — | 
                                                4,149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                3,814,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,375,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Ordinary income | — | — | 
                                                63,912,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                128,835,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                63,113,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                112,685,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                58,462,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                3,166,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,933,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,908,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                14,052,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,880,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,084,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                27,262,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                15,598,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | — | — | 
                                                10,397,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                19,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                9,517,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                18,630,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                10,324,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | — | — | 
                                                -16,006,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                64,614,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                25,130,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -4,221,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -17,220,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                429,486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                299,137,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                451,464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                302,002,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                302,129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                414,538,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                303,187,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                392,561,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                302,596,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                382,898,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                7,568,863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                304,493,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,535,480,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                304,434,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                304,477,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,434,139,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                304,589,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,190,557,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                303,906,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,192,939,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets per share | 
                                                11,848.20
                                                
                                             | — | — | — | — | — | 
                                                12,257.68
                                                
                                             | — | — | — | — | 
                                                11,249.60
                                                
                                             | — | — | 
                                                10,626.43
                                                
                                             | — | — | — | 
                                                10,234.00
                                                
                                             | — | 
| Basic earnings (loss) per share | — | — | 
                                                286.35
                                                
                                             | — | — | 
                                                530.55
                                                
                                             | — | — | — | 
                                                261.98
                                                
                                             | — | — | — | — | — | 
                                                505.78
                                                
                                             | — | — | — | 
                                                279.22
                                                
                                             | 
| Diluted earnings per share | — | — |  | — | — |  | — | — | — |  | — | — | — | — | — | 
                                                505.44
                                                
                                             | — | — | — | 
                                                278.85
                                                
                                             | 
| Equity-to-asset ratio | 
                                                0.0561
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.9824
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0593
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.9920
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.9922
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0552
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.9953
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0540
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.9956
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.0527
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                27,896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                156,768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                155,765,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -1,369,207,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -1,233,725,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) investing activities | — | — | 
                                                28,074,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                70,657,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                15,587,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -8,184,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                69,013,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -6,035,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -6,543,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -3,985,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -5,921,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -2,585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and cash equivalents | 
                                                1,018,201,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                968,268,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                914,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                747,378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                963,396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Number of employees | 
                                                2,494
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                163
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                2,451
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                164
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                160
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                2,551
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                144
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,532
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                145
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                2,662
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Average number of temporary employees | 
                                                545
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                7
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                614
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                7
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                7
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                627
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                677
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                691
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |