Notes - Segment Information, Etc.
| Concept | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||
| Segment information | ||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||
| Sales | ||||||||
| Revenues from external customers | 
                                                635,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,491,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,291,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,163,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,938,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                681,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,182,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,074,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |