Issued Shares
| Concept | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|
| Issued shares | |||||||||
| Issued shares | |||||||||
| Number of shares | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                5,522,200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                5,518,700
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                3,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | 
| Number of voting rights | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                55,187
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                55,187
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
| Description |  | 
                                                単元株式数は100株であります
                                                
                                             |  | — | — | — |  |  |  |