Consolidated Statement Of Comprehensive Income
| Concept | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of comprehensive income | ||||||||||||||
| Statement of comprehensive income | ||||||||||||||
| Profit (loss) | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,332,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,332,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,332,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,229,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,229,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,229,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||||||||||||||
| Items that will not be reclassified to profit or loss | ||||||||||||||
| Remeasurements of defined benefit plans | — | 
                                                1,302,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -3,908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Net change in fair value of equity instruments designated as measured at fair value through other comprehensive income | — | 
                                                -4,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -138,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Total of items that will not be reclassified to profit or loss | — | 
                                                710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -142,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Items that may be reclassified to profit or loss | ||||||||||||||
| Exchange differences on translation of foreign operations | — | 
                                                600,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,084,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Total of items that may be reclassified to profit or loss | — | 
                                                600,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,084,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Other comprehensive income | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                601,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                601,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                601,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                942,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                942,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                942,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,933,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,933,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                601,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,332,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,286,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,286,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                942,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,229,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income attributable to | ||||||||||||||
| Owners of parent | — | 
                                                1,933,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -1,286,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — |