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 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 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 | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,693,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,693,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,693,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,416,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,416,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,416,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||
| Depreciation | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                367,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                367,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                367,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |