Notes - Significant Accounting Policies For Preparation Of Consolidated Financial Statements
| Concept | 
                                    
                                        2023-04-01 to 2024-03-31  | 
                            
                                
                                    
                                        As at 2024-03-31  | 
                            
                        
|---|---|---|
| Notes - Significant accounting policies for preparation of consolidated financial statements | ||
| Notes - Significant accounting policies for preparation of consolidated financial statements | ||
| Disclosure of scope of consolidation | ||
| Number of consolidated subsidiaries and names of major consolidated subsidiaries | 
                                        
                                             1 連結の範囲に関する事項 すべての子会社を連結しております。 連結子会社の数 1社 連結子会社の名称 上海平木福客商業有限公司 
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                                    — | 
| Number of consolidated subsidiaries | — | 
                                        
                                             
                                                1
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Disclosure about application of equity method | ||
| Number of unconsolidated subsidiaries and associates accounted for using equity method and names of major entities accounted for using equity method | 
                                        
                                             2 持分法の適用に関する事項 当社には、非連結子会社および関連会社はありません。 
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                                    — | 
| Disclosure about fiscal years, etc. of consolidated subsidiaries | 
                                        
                                             3 連結子会社の事業年度等に関する事項   上海平木福客商業有限公司の決算日は12月31日であります。 
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                                    — | 
| Disclosure of accounting policies | ||
| Disclosure of accounting policies | — |