Supplementary Provisions, Article 5Special Provisions Concerning Acquisition of Nationality by a Child of a Person Who Acquired Nationality
第五条（国籍を取得した者の子の国籍の取得に関する特例）
Where the father or mother has acquired Japanese nationality under Article 2, paragraph (1) of the Supplementary Provisions (excluding a case where the proviso to paragraph (3) of that Article applies), a child born on or after the time of the prior notification made by that father or mother and before the time that father or mother acquired Japanese nationality (excluding a person who was formerly a Japanese national) may acquire Japanese nationality by giving notification to the Minister of Justice, only within three years from the effective date; provided, however, that this does not apply where that father or mother is an adoptive parent, or is a person who made the acknowledgment after the birth.
A person who made a notification under the preceding paragraph acquires Japanese nationality at the time of that notification.
前項の規定による届出をした者は、その届出の時に日本の国籍を取得する。
The provision of Article 2, paragraph (2) of the Supplementary Provisions applies mutatis mutandis to a notification under paragraph (1).