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 and profit (loss) for each reportable segment | ||||||||||
| Sales | ||||||||||
| Revenues from external customers | 
                                                1,018,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,635,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,018,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                969,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                624,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                624,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                604,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |