Consolidated Statement Of Changes In Equity
| Concept | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | As at 2024-03-31 | 2024-01-01 to 2024-03-31 | As at 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 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 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-03-31 | As at 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 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 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of changes in equity | ||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity | ||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | 
                                                2,438,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,963,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                238,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -140,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,412,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,412,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                912,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,137,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                804,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,137,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,438,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,963,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -140,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                629,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                2,429,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,954,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,949,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                76,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,949,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -140,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,947,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,947,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,427,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,952,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                130,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                577,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -140,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | ||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                87,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                51,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other comprehensive income | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                188,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                188,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                188,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -53,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -53,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -53,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Comprehensive income | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                275,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                275,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                188,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -53,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Transactions with owners | ||||||||||||||||||||||||||||||||||||||||||
| Total transactions with owners | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — |