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 | 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 | 2023-01-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||||
| Segment information | ||||||||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||||||||
| Sales | ||||||||||||||
| Revenues from external customers | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                337,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,081,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,431,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,418,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,431,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,017,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                334,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,365,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,351,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,365,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                -1,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |