Statement Of Changes In Equity
| Concept | 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 | 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 | 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 | 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 | As at 2024-03-31 | As at 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 | 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 | 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 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                6,672,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,148,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                261,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,694,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                831,413,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -247,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,775,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                940,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                102,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                102,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                928,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,173,971,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                928,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                940,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                261,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -247,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,649,506,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                92,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                92,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                831,413,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                193,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,266,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,195,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                831,413,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,668,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                261,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,319,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,669,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                940,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                928,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -268,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,625,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,319,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,122,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dividends of surplus | — | — | — | — | — | — | — | — | — | 
                                                -142,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -142,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -142,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                -142,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -111,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -111,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -111,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                -111,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Profit (loss) | — | — | — | — | — | — | — | — | — | 
                                                641,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                641,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                641,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                641,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disposal of treasury shares | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                21,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                21,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                21,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Net changes in items other than shareholders' equity | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                10,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                10,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                47,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                47,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                47,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                498,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                498,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                498,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                508,891,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                47,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                526,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                548,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                596,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                21,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                526,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — |