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 | 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 | 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 | 
                                                35,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,282,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,460,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,460,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,247,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,422,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                105,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,422,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                11,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,684,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,857,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |