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 | 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 | 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 | 
                                                123,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,092,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,847,448,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,746,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,742,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,787,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                678,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,156,324,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,955,697,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                778,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,056,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,010,979,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |