Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 
|---|---|---|---|---|---|---|
| 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 | 
                                                1,780,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,063,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,160,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,063,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||
| Depreciation | 
                                                172,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                196,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                194,018,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                274,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                315,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                312,805,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |