Statement Of Members' Equity
| Concept | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 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 | 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 | 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 | 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 | 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 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of members' equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of members' equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                1,276,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -126,040,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                41,044,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                26,252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                40,659,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                26,465,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,383,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                198,219,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                187,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                31,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                494,577,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -126,040,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                48,944,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                42,516,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                252,097,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,779,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                546,984,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,541,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                629,515,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                224,471,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                26,252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                56,661,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                31,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,552,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                187,935,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,659,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -111,235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                227,006,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                30,682,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                30,682,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,920,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                42,090,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,779,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                519,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,423,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,048,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                162,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -111,235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                388,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                31,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                605,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                481,613,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,671,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                218,618,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,302,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,652,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,147,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                197,488,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,779,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,147,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                475,006,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                207,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,417,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,572,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,927,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -81,927,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -81,927,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -756,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,837,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,659,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                545,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                187,605,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                484,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,312,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                43,282,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                43,282,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                43,282,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
                                                54,754,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                43,282,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                45,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                45,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                45,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                45,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                57,838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Net changes in items other than shareholders' equity | — | — | — | — | 
                                                -4,455,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,882,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                -1,277,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                14,745,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -4,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,591,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                10,604,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -4,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                9,823,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                3,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                10,535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                30,207,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                10,535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,018,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                10,535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,503,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                53,842,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,455,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,882,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,804,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -14,804,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,277,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                10,283,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,745,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,852,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,964,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,591,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                25,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,568,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,091,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,823,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,527,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,606,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                330,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,865,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                30,207,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -29,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,018,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                10,535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,517,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,503,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,397,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -29,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                517,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |