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 | 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, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||
| Sales | ||||||||||
| Revenues from external customers | 
                                                2,047,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,047,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,233,849,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                813,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,450,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,450,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                747,761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,702,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -27,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |