Supplementary Provisions, Article 12
第十二条
The period during which a person was an insured person under the provisions of Article 5, paragraph (1) of the Supplementary Provisions of the National Pension Act before the revision by the provisions of Article 1 of the Act Partially Amending the National Pension Act, etc. (Act No. 86 of 1989) (limited to a period falling under Article 7, paragraph (1), item (i), (a) of the National Pension Act before the revision by the provisions of Article 1 of the Act Partially Amending the National Pension Act, etc. (Act No. 86 of 1989), and excluding a premium-paid period prescribed in Article 5, paragraph (2) of the National Pension Act and a period during which the person was 60 years of age or older; the same applies hereinafter in this paragraph), for a person who has such a period during which the person was an insured person, is, in the case of applying the provisions of Article 9, paragraph (1) of the Supplementary Provisions of the National Pension Act, included, as of the item (iv) effective date, in the credited period.
国民年金法等の一部を改正する法律（平成元年法律第八十六号）第一条の規定による改正前の国民年金法附則第五条第一項の規定による被保険者であった期間（国民年金法等の一部を改正する法律（平成元年法律第八十六号）第一条の規定による改正前の国民年金法第七条第一項第一号イに該当するものに限り、国民年金法第五条第二項に規定する保険料納付済期間及び六十歳以上であった期間を除く。以下この項において同じ。）を有する者に係る当該被保険者であった期間は、国民年金法附則第九条第一項の規定を適用する場合にあっては、第四号施行日において、合算対象期間に算入する。
The provisions of Article 10, paragraphs (3) and (4) of the Supplementary Provisions apply mutatis mutandis to the period included in the credited period pursuant to the provisions of the preceding paragraph. In this case, the term "Article 10, paragraph (2) of the Supplementary Provisions" in paragraph (4) of that Article is deemed to be replaced with "Article 12, paragraph (1) of the Supplementary Provisions".