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 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 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 | 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 | 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 | 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 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                6,584,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                451,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                505,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,344,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,758,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                505,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                373,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,645,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,685,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,563,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                9,306,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                6,795,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                451,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                44,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                4,755,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,055,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                418,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                418,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                511,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                373,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                5,743,946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,982,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -2,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,373,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,817,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                511,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,173,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                285,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,502,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                150,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,442,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,188,812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,453,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                285,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                322,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,632,448,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,203,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,166,787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dividends of surplus | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                9,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -164,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -154,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -154,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -154,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -154,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -154,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -154,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -169,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -154,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                15,442,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -154,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -154,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                -154,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -154,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -154,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Profit (loss) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                1,743,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,743,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,743,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                2,097,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,743,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                707,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                707,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                707,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                707,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                732,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Net changes in items other than shareholders' equity | — | — | — | — | 
                                                -6,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -6,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                33,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -1,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                33,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                -8,253,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                33,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -113,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                167,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                167,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                167,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                226,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                112,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -6,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                33,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,580,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,589,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,622,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,941,303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,933,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,941,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,589,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -113,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                540,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                628,545,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                15,442,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                552,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                720,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -90,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                167,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                167,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                552,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                577,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                741,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -90,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                51,476,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |