Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                577,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,539,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,678,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,794,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,794,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,732,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                484,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,430,841,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,648,104,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,648,104,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -94,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |