Notes - Segment Information, Etc.
| Concept | 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 | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                2,295,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,138,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,304,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,251,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,043,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                908,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,428,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,347,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,337,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,648,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                41,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                29,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |