Quarter Period Consolidated Statement Of Comprehensive Income
| Concept | 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 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Quarter period consolidated statement of comprehensive income | ||||||||||
| Statement of comprehensive income | ||||||||||
| Profit (loss) | 
                                                527,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                527,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                294,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                527,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                527,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,497,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,497,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                368,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,497,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,497,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||||||||||
| Valuation difference on available-for-sale securities | — | — | 
                                                -99,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Foreign currency translation adjustment | — | — | 
                                                240,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                360,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Remeasurements of defined benefit plans, net of tax | — | — | 
                                                2,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                17,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other comprehensive income | — | — | 
                                                243,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                376,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income | — | — | 
                                                538,290,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                745,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income attributable to | ||||||||||
| Comprehensive income attributable to owners of parent | — | — | 
                                                538,290,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                745,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |