Notes - Significant Accounting Policies For Preparation Of Semi-Annual Consolidated Financial Statements
| Concept | 
                                    
                                        As at 2025-03-31  | 
                            
                                
                                    
                                        2024-04-01 to 2025-03-31  | 
                            
                        
|---|---|---|
| Notes - Significant accounting policies for preparation of semi-annual consolidated financial statements | ||
| Notes - Significant accounting policies for preparation of semi-annual consolidated financial statements | ||
| Disclosure of scope of consolidation | ||
| Number of consolidated subsidiaries and names of major consolidated subsidiaries | — | 
                                        
                                             (1) 連結子会社の数 8社 (2) 連結子会社の名称 株式会社エムジーホーム 株式会社アーキッシュギャラリー エムジー総合サービス株式会社 株式会社TAKI HOUSE 株式会社ミライエ 株式会社髙垣組 株式会社川﨑ハウジング 株式会社ハウメンテ 
  | 
                                
                            
| Number of consolidated subsidiaries | 
                                        
                                             
                                                8
                                                
                                                    
                                                        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 | — | 
                                        
                                             (1) 持分法を適用した関連会社数 該当事項はありません。 
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| Names of major unconsolidated subsidiaries and associates not accounted for using equity method and reasons for this treatment | — | 
                                        
                                             (2) 持分法を適用しない関連会社数 該当事項はありません。 
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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 連結子会社の決算日は、連結決算日と一致しております。 
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| Disclosure of accounting policies | ||
| Disclosure of accounting policies | — |