Consolidated Statement Of Changes In Equity
| Concept | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 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 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 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 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 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 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                -800,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,433,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,355,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,433,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,355,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,003,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,205,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,716,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,133,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,578,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -800,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                190,966,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,716,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,433,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,654,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                298,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,783,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                150,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,712,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                8,391,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,387,793,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                32,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,716,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                8,266,605,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,433,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -460,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,554,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,562,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,597,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,562,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,456,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                298,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                5,717,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                549,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,456,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,705,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -460,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,716,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,159,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,429,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,729,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                130,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,864,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                35,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                35,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,102,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                975,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,356,318,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                298,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,716,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,716,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                352,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,010,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,207,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,080,479,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                974,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,456,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,456,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -459,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -459,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,705,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,433,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,315,773,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,069,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,494,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dividends of surplus | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -120,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -120,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -120,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -120,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -120,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -120,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -120,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                -123,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -123,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                -123,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -123,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -123,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -123,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -123,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Profit (loss) attributable to owners of parent | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                629,354,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                629,354,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                629,354,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                346,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                346,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                346,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Net changes in items other than shareholders' equity | — | — | — | 
                                                -207,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -150,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -207,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                60,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -209,982,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -150,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -209,982,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -2,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -5,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                587,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                38,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                587,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                626,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                587,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                587,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                620,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -207,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -23,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -150,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -207,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -339,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -339,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -23,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -399,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -1,262,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,472,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,296,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,446,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -933,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -899,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -209,982,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -23,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -5,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                197,787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                222,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                196,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                783,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                38,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                587,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                626,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                587,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                197,787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                587,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                843,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |