Semi-Annual Consolidated Statement Of Changes In Equity
| Concept | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 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 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                141,099,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                89,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,914,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                37,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -21,001,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                155,925,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                35,407,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,826,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,826,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                35,358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                136,038,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                32,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,019,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,556,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                16,492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                37,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                152,531,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                27,920,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,241,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,703,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                126,283,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,359,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,580,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,703,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,878,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dividends of surplus | — | — | — | — | — | — | — | — | — | 
                                                -7,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                -7,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -6,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -6,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -6,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                -6,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disposal of treasury shares | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Net changes in items other than shareholders' equity | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -1,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -1,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                8,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                8,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                8,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,994,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                24,994,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,061,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                48,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -19,981,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,394,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                48,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                8,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,678,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,457,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                26,247,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,779,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,678,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — |