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 | 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 | 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 | 
                                                82,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,661,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,816,330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,816,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,766,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                232,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,018,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,018,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -46,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -44,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |