Notes - Segment Information, Etc.
| 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 | 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 | 2023-01-01 to 2023-06-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||
| Segment information | ||||||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||||||
| Sales | ||||||||||||
| Revenues from external customers | 
                                                2,794,401,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,794,401,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,100,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                668,068,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,025,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,404,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,404,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                919,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                959,808,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                525,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                7,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |