Notes - Segment Information, Etc.
| Concept | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 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 | 2023-10-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                560,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                590,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                590,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                446,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,970,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                412,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                446,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -37,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -37,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |