Notes - Segment Information, Etc.
| Concept | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2022-10-01 to 2023-03-31 | 2022-10-01 to 2023-03-31 | 2022-10-01 to 2023-03-31 | 2022-10-01 to 2023-03-31 | 2022-10-01 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 | 
                                                3,850,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,850,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,629,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,581,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,401,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                180,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,581,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                2,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |