Notes - Segment Information, Etc.
| Concept | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,320,842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,680,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,716,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,717,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,717,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,328,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,324,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,593,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,980,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,912,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,912,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |