Quarter Period 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 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Quarter period consolidated statement of comprehensive income | ||||||||||
| Statement of comprehensive income | ||||||||||
| Profit (loss) | 
                                                633,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                646,107,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                633,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                633,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                633,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                481,746,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                481,746,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                516,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                481,746,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                481,746,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||||||||||
| Foreign currency translation adjustment | — | 
                                                8,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                11,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other comprehensive income | — | 
                                                8,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                11,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income | — | 
                                                654,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                527,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income attributable to | ||||||||||
| Comprehensive income attributable to owners of parent | — | 
                                                654,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                527,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |