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 | 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 | 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 | 
                                                418,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,491,892,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,491,892,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,072,925,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,857,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,407,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                449,707,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,857,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                51,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -51,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -49,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |