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, profit (loss), asset, liability, and other items for each reportable segment | ||||||||
| Sales | ||||||||
| Revenues from external customers | 
                                                667,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                933,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,216,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,615,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,976,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                846,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                848,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,670,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |