Semi-Annual Statement Of Income And Retained Earnings
| Concept | 
                                    
                                        2024-01-01 to 2024-06-30  | 
                            
                                
                                    
                                        2024-01-01 to 2024-06-30  | 
                            
                                
                                    
                                        2024-01-01 to 2024-06-30  | 
                            
                                
                                    
                                        2024-01-01 to 2024-06-30  | 
                            
                                
                                    
                                        2024-01-01 to 2024-06-30  | 
                            
                                
                                    
                                        2023-01-01 to 2023-06-30  | 
                            
                                
                                    
                                        2023-01-01 to 2023-06-30  | 
                            
                                
                                    
                                        2023-01-01 to 2023-06-30  | 
                            
                                
                                    
                                        2023-01-01 to 2023-06-30  | 
                            
                                
                                    
                                        2023-01-01 to 2023-06-30  | 
                            
                        
|---|---|---|---|---|---|---|---|---|---|---|
| Semi-annual statement of income and retained earnings | ||||||||||
| Statement of income and retained earnings | ||||||||||
| Operating profit (loss) | 
                                        
                                             
                                                574,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                240,684,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                885,675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                70,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                589,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                591,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                98,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                342,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                734,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,032,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Non-operating income | ||||||||||
| Non-operating income | — | — | — | — | 
                                        
                                             
                                                124,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                72,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Non-operating expenses | ||||||||||
| Non-operating expenses | — | — | — | — | 
                                        
                                             
                                                4,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                3,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Ordinary profit (loss) | — | — | — | — | 
                                        
                                             
                                                709,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                803,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Extraordinary income | ||||||||||
| Extraordinary income | — | — | — | — | 
                                        
                                             
                                                76,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Profit (loss) before income taxes | — | — | — | — | 
                                        
                                             
                                                786,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                803,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Income taxes - current | — | — | — | — | 
                                        
                                             
                                                296,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                258,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Income taxes - deferred | — | — | — | — | 
                                        
                                             
                                                -40,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                17,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Profit (loss) | — | — | — | — | 
                                        
                                             
                                                530,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | — | 
                                        
                                             
                                                527,371,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — |