If a child's surname differs from that of the father or mother, the child may take the surname of the father or mother after obtaining the permission of the family court, through the filing of a registration pursuant to the provisions of the Family Register Act.
子が父又は母と氏を異にする場合には、子は、家庭裁判所の許可を得て、戸籍法の定めるところにより届け出ることによって、その父又は母の氏を称することができる。
If a child's surname differs from that of the parents due to the father or mother changing surnames, the child may take the name of the parents without obtaining the permission referred to in the preceding paragraph only if the parents are married to each other, through the filing of a notification pursuant to the provisions of the Family Register Act.
If a child is under 15 years of age, the legal representative thereof may perform the acts referred to in the preceding two paragraphs on the child's behalf.
子が十五歳未満であるときは、その法定代理人が、これに代わって、前二項の行為をすることができる。
A minor who has changed surnames pursuant to the provisions of one of the preceding three paragraphs may revert to the previous surname within one year of attaining majority, through the filing of a notification pursuant to the provisions of the Family Register Act.