Supplementary Provisions, Article 20Transitional Measures Concerning Calculation of the Amount of Employees' Old-Age Pensions, etc.
第二十条（老齢厚生年金等の額の計算に関する経過措置）
If all or part of the period of being an insured covered by employees' pension insurance is before April 1, 2003, the amount prescribed in Article 43, paragraph (1) of the Employees' Pension Insurance Act (including as followed in Article 50, paragraph (1) and Article 60, paragraph (1), item (i) of that Act, and including as applied in Article 44, paragraph (1) and Article 44-3, paragraph (4) of that Act (including as applied with terms read pursuant to Article 87 of the Supplementary Provisions of the 2013 Amendment Act), Article 59, paragraph (2) of the Supplementary Provisions of the 1985 Amendment Act, Article 44-3, paragraph (4) of the Employees' Pension Insurance Act prior to the amendment by Article 5 that remains in force pursuant to Article 17, paragraph (1) of the Supplementary Provisions, Article 44-2, paragraph (1) of the Employees' Pension Insurance Act prior to the amendment by Article 1 of the 2013 Amendment Act that remains in force pursuant to Article 86, paragraph (1) of the Supplementary Provisions of the 2013 Amendment Act as read pursuant to Article 17-5 of the Supplementary Provisions of the Employees' Pension Insurance Act, and Article 7-3, paragraph (4) and Article 13-4, paragraph (4) of the Supplementary Provisions of the Employees' Pension Insurance Act) and Article 9-2, paragraph (2), item (ii) of the Supplementary Provisions of that Act (including as followed in Article 9-3, paragraphs (1) and (3) of the Supplementary Provisions of that Act (including as followed in paragraph (5) of that Article), Article 9-4, paragraph (1) of the Supplementary Provisions of that Act (including as followed in Article 28-3, paragraph (2) and Article 28-4, paragraph (2) of the Supplementary Provisions of that Act) and Article 9-4, paragraph (4) of the Supplementary Provisions of that Act (including as followed in Article 9-4, paragraph (6) of the Supplementary Provisions of that Act), and Article 18, paragraph (2), Article 19, paragraphs (2) and (4), Article 20, paragraphs (2) and (4), and Article 20-2, paragraphs (2) and (4) of the Supplementary Provisions of the 1994 Amendment Act) is, notwithstanding those provisions, the sum of the amounts set forth in the following items.
厚生年金保険の被保険者であった期間の全部又は一部が平成十五年四月一日前であるときは、厚生年金保険法第四十三条第一項（同法第五十条第一項及び第六十条第一項第一号においてその例による場合並びに同法第四十四条第一項及び第四十四条の三第四項（平成二十五年改正法附則第八十七条の規定により読み替えて適用する場合を含む。）、昭和六十年改正法附則第五十九条第二項、附則第十七条第一項の規定によりなおその効力を有するものとされた第五条の規定による改正前の厚生年金保険法第四十四条の三第四項並びに厚生年金保険法附則第十七条の五の規定により読み替えられた平成二十五年改正法附則第八十六条第一項の規定によりなおその効力を有するものとされた平成二十五年改正法第一条の規定による改正前の厚生年金保険法第四十四条の二第一項並びに厚生年金保険法附則第七条の三第四項及び第十三条の四第四項において適用する場合を含む。）及び同法附則第九条の二第二項第二号（同法附則第九条の三第一項及び第三項（同条第五項においてその例による場合を含む。）並びに同法附則第九条の四第一項（同法附則第二十八条の三第二項及び第二十八条の四第二項においてその例による場合を含む。）及び第四項（同法附則第九条の四第六項においてその例による場合を含む。）並びに平成六年改正法附則第十八条第二項、第十九条第二項及び第四項、第二十条第二項及び第四項並びに第二十条の二第二項及び第四項においてその例による場合を含む。）に定める額は、これらの規定にかかわらず、次の各号に掲げる額を合算した額とする。
an amount obtained by multiplying the amount equal to 7.125/1,000 of the average standardized monthly amount of remuneration for the period of being an insured before April 1, 2003 (meaning the average standardized monthly amount of remuneration prescribed in Article 43, paragraph (1) of the Employees' Pension Insurance Act prior to the amendment by Article 6; the same applies hereinafter) by the number of months in that insured period;
平成十五年四月一日前の被保険者であった期間の平均標準報酬月額（第六条の規定による改正前の厚生年金保険法第四十三条第一項に規定する平均標準報酬月額をいう。以下同じ。）の千分の七・一二五に相当する額に当該被保険者期間の月数を乗じて得た額
an amount obtained by multiplying the amount equal to 5.481/1,000 of the average standardized amount of remuneration for the period of being an insured on or after April 1, 2003 by the number of months in that insured period.
平成十五年四月一日以後の被保険者であった期間の平均標準報酬額の千分の五・四八一に相当する額に当該被保険者期間の月数を乗じて得た額
In the case of calculating the amount set forth in item (i) of the preceding paragraph, Article 59, paragraph (1) and Appended Table 7 of the Supplementary Provisions of the 1985 Amendment Act prior to the amendment by Article 15 remain in force. In this case, necessary technical replacement of terms for the application of Article 59, paragraph (1) of the Supplementary Provisions of the 1985 Amendment Act is specified by Cabinet Order.
前項第一号に掲げる額を計算する場合においては、第十五条の規定による改正前の昭和六十年改正法附則第五十九条第一項及び附則別表第七の規定はなおその効力を有する。この場合において、同項の規定の適用に関し必要な技術的読替えは、政令で定める。
In the case of calculating the amount of an employees' disability pension the amount of which is calculated pursuant to the provisions of paragraph (1) (limited to one for which the number of months of the insured period forming the basis for calculating the amount is less than 300) or of an employees' pension for surviving family (excluding one paid by reason of falling under Article 58, paragraph (1), item (iv) of the Employees' Pension Insurance Act, and limited to one for which the insured period forming the basis for calculating the amount is less than 300), the amount prescribed in paragraph (1) is, notwithstanding that paragraph, the amount obtained by multiplying the amount prescribed in that paragraph by the number obtained by dividing 300 by the number of months of the period of being an insured.
第一項の規定によりその額が計算される障害厚生年金（その額の計算の基礎となる被保険者期間の月数が三百未満であるものに限る。）又は遺族厚生年金（厚生年金保険法第五十八条第一項第四号に該当することにより支給されるものを除くものとし、その額の計算の基礎となる被保険者期間が三百未満であるものに限る。）の額を計算する場合においては、第一項に定める額は、同項の規定にかかわらず、同項に定める額に、三百を被保険者であった期間の月数で除して得た数を乗じて得た額とする。