If a person who has taken a new surname as a result of marriage or adoption reverts to the surname used before the marriage or adoption as a result of divorce, dissolution of an adoptive relationship, or annulment of the marriage or adoption, that person joins the family register which they joined before the marriage or adoption; provided, however, that if their previous family register has already been removed, or when they request the creation of a new family register, a new family register is created.
婚姻又は養子縁組によつて氏を改めた者が、離婚、離縁又は婚姻若しくは縁組の取消によつて、婚姻又は縁組前の氏に復するときは、婚姻又は縁組前の戸籍に入る。但し、その戸籍が既に除かれているとき、又はその者が新戸籍編製の申出をしたときは、新戸籍を編製する。
The provisions of the preceding paragraph apply mutatis mutandis to cases in which a person reverts to the surname used before marriage pursuant to the provisions of Article 751, paragraph (1) of the Civil Code, and a person reverts to their previous surname pursuant to the provisions of Article 791, paragraph (4) of the relevant Code.
前項の規定は、民法第七百五十一条第一項の規定によつて婚姻前の氏に復する場合及び同法第七百九十一条第四項の規定によつて従前の氏に復する場合にこれを準用する。
If a notification has been submitted to the effect that a person will use the surname that they used at the time of their divorce or the annulment of marriage, or at the time of the dissolution of their adoptive relationship or the annulment of their adoption pursuant to the provisions of Article 767, paragraph (2) of the Civil Code (including as applied mutatis mutandis pursuant to Articles 749 and 771 of the relevant Code) or Article 816, paragraph (2) of the relevant Code (including as applied mutatis mutandis pursuant to Article 808, paragraph (2) of the relevant Code), and if there is no family register in which the person has been entered as the head, or if any other person is entered in the family register in which the person who has made the notification has been entered as the head, a new family register is created for the person making the notification.
民法第七百六十七条第二項（同法第七百四十九条及び第七百七十一条において準用する場合を含む。）又は同法第八百十六条第二項（同法第八百八条第二項において準用する場合を含む。）の規定によつて離婚若しくは婚姻の取消し又は離縁若しくは縁組の取消しの際に称していた氏を称する旨の届出があつた場合において、その届出をした者を筆頭に記載した戸籍が編製されていないとき、又はその者を筆頭に記載した戸籍に在る者が他にあるときは、その届出をした者について新戸籍を編製する。