Consolidated Statement Of Changes In Equity
| Concept | 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 | 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 | 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 | 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 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                78,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -490,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                805,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                505,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                805,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                589,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                13,135,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,251,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,318,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                665,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -490,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                76,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                805,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,790,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,974,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,294,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                18,984,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                13,640,240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                505,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                12,032,235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                805,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,212,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,382,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                552,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                552,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                618,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                832,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                166,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                16,461,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,882,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                832,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,251,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -1,212,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,778,346,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,110,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                667,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,584,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                83,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                534,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                455,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,608,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,318,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,029,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,102,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                455,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,909,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,700,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                482,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                826,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                826,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,218,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,218,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,251,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                805,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,443,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,245,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,272,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dividends of surplus | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -595,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -595,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -595,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -595,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -595,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -595,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -595,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -402,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -402,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                -402,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -402,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -402,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -402,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -402,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Profit (loss) attributable to owners of parent | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                1,787,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                1,787,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,787,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                1,591,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                1,591,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,591,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disposal of treasury shares | — | — | — | — | — | 
                                                10,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                6,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                16,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                16,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                16,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                10,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                12,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                12,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                12,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                6,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                6,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Net changes in items other than shareholders' equity | — | — | — | — | 
                                                -29,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -47,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                27,675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -47,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                -1,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -47,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                96,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                96,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                96,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                136,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                133,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -29,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -26,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -47,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                721,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                721,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -26,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                412,648,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,102,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,055,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,207,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,206,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                512,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                407,917,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -47,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -26,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                779,298,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,200,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                787,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                883,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                96,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                96,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                774,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                136,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,188,371,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,334,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                6,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |