Major Shareholders
| Concept | 
                                    
                                        As at 2025-03-31  | 
                            
                                
                                    
                                        As at 2025-03-31  | 
                            
                                
                                    
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Major shareholders | |||||||||||
| Major shareholders | |||||||||||
| Name | 
                                        
                                             
                                                株式会社日本カストディ銀行(信託口)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                大東建託協力会持株会
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                光通信株式会社
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                NORTHERN TRUST CO. (AVFC) RE SILCHESTER INTERNATIONAL INVESTORS INTERNATIONAL VALUE EQUITY TRUST(常任代理人香港上海銀行東京支店)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                JPモルガン証券株式会社
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                STATE STREET BANK AND TRUST COMPANY 505103(常任代理人株式会社みずほ銀行決済営業部)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                STATE STREET BANK AND TRUST COMPANY 505001(常任代理人株式会社みずほ銀行決済営業部)
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                日本マスタートラスト信託銀行株式会社(信託口)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                大東建託従業員持株会
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                STATE STREET BANK WEST CLIENT - TREATY 505234(常任代理人株式会社みずほ銀行決済営業部)
                                                
                                             
                                        
                                     | 
                                
                            
| Address | 
                                        
                                             
                                                中央区晴海一丁目8-12
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                港区港南二丁目16-1
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                豊島区西池袋一丁目4-10
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                50 BANK STREET CANARY WHARF LONDON E14 5NT, UK(中央区日本橋三丁目11-1)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                千代田区丸の内二丁目7-3
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ONE CONGRESS STREET, SUITE 1, BOSTON, MASSACHUSETTS(港区港南二丁目15-1)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ONE CONGRESS STREET, SUITE 1, BOSTON, MASSACHUSETTS (港区港南二丁目15-1)
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                港区赤坂一丁目8-1 赤坂インターシティAIR
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                港区港南二丁目16-1
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1776 HERITAGE DRIVE, NORTH QUINCY, MA 02171, U.S.A(港区港南二丁目15-1)
                                                
                                             
                                        
                                     | 
                                
                            
| Number of shares held | 
                                        
                                             
                                                3,349,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,634,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                3,598,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,346,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,731,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,201,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                3,825,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                30,313,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                10,674,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,534,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,417,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Shareholding ratio (excluding treasury shares) | 
                                        
                                             
                                                0.0503
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0246
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0541
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0202
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0260
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0181
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0575
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.4554
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.1603
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0230
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                0.0213
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     |