Statement Of Changes In Net Assets
| Concept | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 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 | 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 | 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 | 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 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 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 | 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 net assets | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in net assets | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                -121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                109,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                109,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,345,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,483,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,286,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,483,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -590,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -650,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -590,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,396,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,455,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                109,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,483,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,804,346,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -132,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                137,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                137,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                138,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -741,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -132,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,483,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,333,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,195,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                138,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,941,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                147,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                146,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -252,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,483,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,483,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -252,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                146,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,162,439,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,830,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                147,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,453,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,309,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,684,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -774,406,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -458,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -458,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -458,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                91,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -458,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                120,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                120,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                120,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                120,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                32,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -28,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -27,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -458,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -458,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -485,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                91,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                62,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -458,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -27,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                120,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                32,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                120,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                110,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -9,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |