The Compulsory Enforcement Act Article 4-2
Where the enforcement title is based on an irrevocable final judgment, in addition to the parties, it will also be binding upon the following persons:1. A person who becomes a party's successor and a person who possesses the claimed object for the parties or their successors after the initiation of the action.2. A person who has another act as the plaintiff or the defendant for him/her, and his/her successors and a person who possesses the claimed object for him/her or his/her successors after the initiation of the action.The provisions of the preceding paragraph applies mutatis mutandis to the enforcement titles prescribed in Article 4 paragraph 1 subparagraphs 2 to 6.
中文原文 強制執行法第4-2條
執行名義為確定終局判決者，除當事人外，對於左列之人亦有效力：
一、訴訟繫屬後為當事人之繼受人及為當事人或其繼受人占有請求之標的物者。
二、為他人而為原告或被告者之該他人及訴訟繫屬後為該他人之繼受人，及為該他人或其繼受人占有請求之標的物者。
前項規定，於第四條第一項第二款至第六款規定之執行名義，準用之。
一、訴訟繫屬後為當事人之繼受人及為當事人或其繼受人占有請求之標的物者。
二、為他人而為原告或被告者之該他人及訴訟繫屬後為該他人之繼受人，及為該他人或其繼受人占有請求之標的物者。
前項規定，於第四條第一項第二款至第六款規定之執行名義，準用之。