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 | 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 | 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 | 
                                                7,642,290,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,642,290,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,401,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,172,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,068,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,149,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,020,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,149,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,356,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,772,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -91,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |