Supplementary Provisions, Article 8
第八条
A person entered in the family register at the time of enforcement of the provisions listed in Article 1, item (iii) of the Supplementary Provisions (excluding a person who has already made a notification under the provisions of this paragraph or the following paragraph) may make a notification regarding the given name kana characters of the given name listed in the person's family register, limited to a period within one year from the effective date of item (iii).
Limited to within one year from the effective date of item (iii), the person prescribed in the preceding paragraph who uses a pronunciation other than the general pronunciation for the given name referred to in the preceding paragraph at the time of enforcement of the provisions set forth in Article 1, item (iii) of the Supplementary Provisions may make a notification to the effect that the characters displaying the pronunciation of the given name that are being used are to be particulars entered into the family register in lieu of the notification in the preceding paragraph. In this case, in applying the provisions of Article 13, paragraph (1), item (ii), Article 29, item (iv), Article 107-2 and Article 107-4 of the new Family Register Act, and other laws and regulations, to the person making the notification, the characters related to the relevant notification are deemed to be the given name kana characters.
The person making the notification referred to in the preceding paragraph must submit a document certifying that the pronunciation of the given name that is being used is generally accepted.
前項の届出をする者は、現に使用している名の読み方が通用していることを証する書面を提出しなければならない。