# 厚生年金保険法 / Employees' Pension Insurance Act — 第六十三条 (Supplementary Provisions, Article 63) - Law: 厚生年金保険法 (Employees' Pension Insurance Act), 昭和二十九年法律第百十五号 - English title "Employees' Pension Insurance Act": Ministry of Justice translation - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第六十三条 (Supplementary Provisions, Article 63)（厚生年金保険法による年金額の計算の特例） — address `suppl-3551-82/art-63` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3551-82/art-63 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/suppl-3551-82/art-63 - Every provision below carries its address and both URLs on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第六十三条（厚生年金保険法による年金額の計算の特例） — Special Provisions on Calculation of Pension Amounts under the Employees' Pension Insurance Act caption: machine translation, not official suppl-3551-82/art-63 · https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3551-82/art-63 · https://japanlaw.org/l/329AC0000000115/suppl-3551-82/art-63 **第一項** 厚生年金保険法及び船員保険法の一部を改正する法律（昭和四十四年法律第七十八号）附則第四条第一項又は第二項に規定する者であつて、昭和三十二年十月前の厚生年金保険の被保険者であつた期間の一部が国民年金法等の一部を改正する法律（昭和六十年法律第三十四号。以下この条において「昭和六十年改正法」という。）第三条の規定による改正前の厚生年金保険法第三条第一項第五号に規定する第三種被保険者であつた期間（同法附則第四条第二項の規定により当該第三種被保険者であつた期間とみなされ、又は当該期間に関する規定を準用することとされた期間、昭和六十年改正法附則第四十七条第一項の規定により厚生年金保険の被保険者であつた期間とみなされた期間及び厚生年金保険法等の一部を改正する法律（平成八年法律第八十二号）附則第五条第一項の規定により厚生年金保険の被保険者であつた期間とみなされた期間（同条第二項に規定する旧船員組合員であつた期間に限る。）を含む。以下この条において「旧第三種被保険者等であつた期間」という。）であるものの厚生年金保険法による老齢、障害又は死亡に関し支給する保険給付（老齢厚生年金、障害厚生年金又は遺族厚生年金に限る。）については、当該保険給付の額（同法第四十四条（同法附則第九条の二第三項、第九条の三第二項及び第四項（同条第五項においてその例による場合を含む。）並びに第九条の四第三項及び第五項（同条第六項においてその例による場合を含む。）並びに国民年金法等の一部を改正する法律（平成六年法律第九十五号）附則第十八条第三項、第十九条第三項及び第五項、第二十条第三項及び第五項並びに第二十七条第十三項及び第十四項において準用する場合を含む。以下この条において同じ。）及び同法第五十条の二に規定する加給年金額、同法第六十二条第一項の規定により加算する額並びに昭和六十年改正法附則第七十三条第一項並びに同法附則第七十四条第一項及び第二項の規定により加算する額を除く。）が、施行日の属する月前の旧第三種被保険者等であつた期間を同法第三条の規定による改正前の厚生年金保険法第三条第一項第一号に規定する第一種被保険者（以下この条において「旧第一種被保険者」という。）であつた期間とみなして計算した当該保険給付の額（厚生年金保険法第四十四条及び同法第五十条の二に規定する加給年金額、同法第六十二条第一項の規定により加算する額並びに昭和六十年改正法附則第七十三条第一項並びに同法附則第七十四条第一項及び第二項の規定により加算する額を除く。）に満たないときは、その者の請求により、同日前の旧第三種被保険者等であつた期間を旧第一種被保険者であつた期間とみなして当該保険給付の額を計算するものとし、その請求をした日の属する月の翌月から、当該保険給付の額を改定する。ただし、老齢厚生年金及び遺族厚生年金（同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に限る。）であつて、その額の計算の基礎となる厚生年金保険の被保険者期間の月数が二百四十未満であるもの（昭和六十年改正法附則第十二条第一項第四号から第七号までのいずれかに該当することにより支給されるものを除く。）については、この限りでない。 suppl-3551-82/art-63/par-1 · https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3551-82/art-63/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3551-82/art-63/par-1 With regard to insurance benefits paid in connection with old age, disability or death under the Employees' Pension Insurance Act (limited to employees' old-age pensions, employees' disability pensions or employees' pensions for surviving family) of a person prescribed in Article 4, paragraph (1) or (2) of the Supplementary Provisions of the Act Partially Amending the Employees' Pension Insurance Act and the Mariners Insurance Act (Act No. 78 of 1969), a part of whose period of having been an insured covered by employees' pension insurance before October 1957 is a period of having been a class 3 insured person prescribed in Article 3, paragraph (1), item (v) of the Employees' Pension Insurance Act prior to its amendment by the provisions of Article 3 of the Act Partially Amending the National Pension Act, etc. (Act No. 34 of 1985; hereinafter in this Article referred to as the "1985 Amendment Act") (including the period deemed to be that period of having been a class 3 insured person, or the period for which the provisions concerning that period are to apply mutatis mutandis, pursuant to the provisions of Article 4, paragraph (2) of the Supplementary Provisions of the Employees' Pension Insurance Act prior to that amendment, the period deemed to be a period of having been an insured covered by employees' pension insurance pursuant to the provisions of Article 47, paragraph (1) of the Supplementary Provisions of the 1985 Amendment Act, and the period deemed to be a period of having been an insured covered by employees' pension insurance pursuant to the provisions of Article 5, paragraph (1) of the Supplementary Provisions of the Act Partially Amending the Employees' Pension Insurance Act, etc. (Act No. 82 of 1996) (limited to the period of having been a former mariner member prescribed in paragraph (2) of that Article); hereinafter in this Article referred to as the "period as a former class 3 insured person, etc."), if the amount of those insurance benefits (excluding the additional amount of pension prescribed in Article 44 of the Employees' Pension Insurance Act (including as applied mutatis mutandis pursuant to Article 9-2, paragraph (3), Article 9-3, paragraphs (2) and (4) (including where followed pursuant to paragraph (5) of that Article) and Article 9-4, paragraphs (3) and (5) (including where followed pursuant to paragraph (6) of that Article) of the Supplementary Provisions of the Employees' Pension Insurance Act and Article 18, paragraph (3), Article 19, paragraphs (3) and (5), Article 20, paragraphs (3) and (5) and Article 27, paragraphs (13) and (14) of the Supplementary Provisions of the Act Partially Amending the National Pension Act, etc. (Act No. 95 of 1994); the same applies hereinafter in this Article) and Article 50-2 of the Employees' Pension Insurance Act, the amount to be added pursuant to the provisions of Article 62, paragraph (1) of the Employees' Pension Insurance Act, and the amount to be added pursuant to the provisions of Article 73, paragraph (1) of the Supplementary Provisions of the 1985 Amendment Act and Article 74, paragraphs (1) and (2) of the Supplementary Provisions of the 1985 Amendment Act) is less than the amount of those insurance benefits calculated by deeming the period as a former class 3 insured person, etc. before the month that includes the Effective Date to be a period of having been a former class 1 insured person (meaning a class 1 insured person prescribed in Article 3, paragraph (1), item (i) of the Employees' Pension Insurance Act prior to its amendment by the provisions of Article 3 of the 1985 Amendment Act; hereinafter in this Article referred to as a "former class 1 insured person") (excluding the additional amount of pension prescribed in Article 44 and Article 50-2 of the Employees' Pension Insurance Act, the amount to be added pursuant to the provisions of Article 62, paragraph (1) of the Employees' Pension Insurance Act, and the amount to be added pursuant to the provisions of Article 73, paragraph (1) of the Supplementary Provisions of the 1985 Amendment Act and Article 74, paragraphs (1) and (2) of the Supplementary Provisions of the 1985 Amendment Act), then, at the person's request, the amount of those insurance benefits is to be calculated by deeming the period as a former class 3 insured person, etc. before the Effective Date to be a period of having been a former class 1 insured person, and the amount of those insurance benefits is revised from the month following the month that includes the day on which the request was made; provided, however, that this does not apply to an employees' old-age pension or employees' pension for surviving family (limited to one paid by reason of falling under Article 58, paragraph (1), item (iv) of the Employees' Pension Insurance Act) for which the number of months of the insured period under employees' pension insurance that forms the basis for calculating its amount is less than 240 (excluding one paid by reason of falling under any of Article 12, paragraph (1), items (iv) through (vii) of the Supplementary Provisions of the 1985 Amendment Act). machine translation, not official --- ## Cites - suppl-3551-82/art-63/par-1: 厚生年金保険法及び船員保険法の一部を改正する法律（昭和四十四年法律第七十八号）附則第四条第一項 → 厚生年金保険法 附則第四条第一項 (Supplementary Provisions, Article 4, paragraph (1)), suppl-3441-78/art-4/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3441-78/art-4/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4/par-1 - suppl-3551-82/art-63/par-1: 第二項 → 厚生年金保険法 附則第四条第二項 (Supplementary Provisions, Article 4, paragraph (2)), suppl-3441-78/art-4/par-2 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3441-78/art-4/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4/par-2 - suppl-3551-82/art-63/par-1: 昭和六十年改正法附則第四十七条第一項 → 厚生年金保険法 附則第四十七条第一項 (Supplementary Provisions, Article 47, paragraph (1)), suppl-3601-34/art-47/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-47/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-47/par-1 - suppl-3551-82/art-63/par-1: 険の被保険者であつた期間とみなされた期間及び厚生年金保険法等の一部を改正する法律（平成八年法律第八十二号）附則第五条第一項 → 厚生年金保険法 附則第五条第一項 (Supplementary Provisions, Article 5, paragraph (1)), suppl-4081-82/art-5/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4081-82/art-5/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4081-82/art-5/par-1 - suppl-3551-82/art-63/par-1: 同条第二項 → 厚生年金保険法 附則第五条第二項 (Supplementary Provisions, Article 5, paragraph (2)), suppl-4081-82/art-5/par-2 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4081-82/art-5/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-4081-82/art-5/par-2 - suppl-3551-82/art-63/par-1: この条 → 厚生年金保険法 附則第六十三条 (Supplementary Provisions, Article 63), suppl-3551-82/art-63 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3551-82/art-63 · https://japanlaw.org/l/329AC0000000115/suppl-3551-82/art-63 - suppl-3551-82/art-63/par-1: 同法第四十四条 → 厚生年金保険法 第四十四条 (Article 44), art-44 — https://japanlaw.org/ja/employees-pension-insurance-act/art-44 · https://japanlaw.org/l/329AC0000000115/art-44 - suppl-3551-82/art-63/par-1: 同法附則第九条の二第三項 → 厚生年金保険法 附則第九条の二第三項 (Supplementary Provisions, Article 9-2, paragraph (3)), suppl-3291-115/art-9-2/par-3 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3291-115/art-9-2/par-3 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-9-2/par-3 - suppl-3551-82/art-63/par-1: 第九条の三第二項 → 厚生年金保険法 附則第九条の三第二項 (Supplementary Provisions, Article 9-3, paragraph (2)), suppl-3291-115/art-9-3/par-2 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3291-115/art-9-3/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-9-3/par-2 - suppl-3551-82/art-63/par-1: 第四項 → 厚生年金保険法 附則第九条の三第四項 (Supplementary Provisions, Article 9-3, paragraph (4)), suppl-3291-115/art-9-3/par-4 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3291-115/art-9-3/par-4 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-9-3/par-4 - suppl-3551-82/art-63/par-1: 同条第五項 → 厚生年金保険法 附則第九条の三第五項 (Supplementary Provisions, Article 9-3, paragraph (5)), suppl-3291-115/art-9-3/par-5 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3291-115/art-9-3/par-5 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-9-3/par-5 - suppl-3551-82/art-63/par-1: 第九条の四第三項 → 厚生年金保険法 附則第九条の四第三項 (Supplementary Provisions, Article 9-4, paragraph (3)), suppl-3291-115/art-9-4/par-3 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3291-115/art-9-4/par-3 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-9-4/par-3 - suppl-3551-82/art-63/par-1: 第五項 → 厚生年金保険法 附則第九条の四第五項 (Supplementary Provisions, Article 9-4, paragraph (5)), suppl-3291-115/art-9-4/par-5 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3291-115/art-9-4/par-5 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-9-4/par-5 - suppl-3551-82/art-63/par-1: 同条第六項 → 厚生年金保険法 附則第九条の四第六項 (Supplementary Provisions, Article 9-4, paragraph (6)), suppl-3291-115/art-9-4/par-6 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3291-115/art-9-4/par-6 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-9-4/par-6 - suppl-3551-82/art-63/par-1: 並びに国民年金法等の一部を改正する法律（平成六年法律第九十五号）附則第十八条第三項 → 厚生年金保険法 附則第十八条第三項 (Supplementary Provisions, Article 18, paragraph (3)), suppl-4061-95/art-18/par-3 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4061-95/art-18/par-3 · https://japanlaw.org/l/329AC0000000115/suppl-4061-95/art-18/par-3 - suppl-3551-82/art-63/par-1: 第十九条第三項 → 厚生年金保険法 附則第十九条第三項 (Supplementary Provisions, Article 19, paragraph (3)), suppl-4061-95/art-19/par-3 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4061-95/art-19/par-3 · https://japanlaw.org/l/329AC0000000115/suppl-4061-95/art-19/par-3 - suppl-3551-82/art-63/par-1: 第五項 → 厚生年金保険法 附則第十九条第五項 (Supplementary Provisions, Article 19, paragraph (5)), suppl-4061-95/art-19/par-5 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4061-95/art-19/par-5 · https://japanlaw.org/l/329AC0000000115/suppl-4061-95/art-19/par-5 - suppl-3551-82/art-63/par-1: 第二十条第三項 → 厚生年金保険法 附則第二十条第三項 (Supplementary Provisions, Article 20, paragraph (3)), suppl-4061-95/art-20/par-3 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4061-95/art-20/par-3 · https://japanlaw.org/l/329AC0000000115/suppl-4061-95/art-20/par-3 - suppl-3551-82/art-63/par-1: 第五項 → 厚生年金保険法 附則第二十条第五項 (Supplementary Provisions, Article 20, paragraph (5)), suppl-4061-95/art-20/par-5 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4061-95/art-20/par-5 · https://japanlaw.org/l/329AC0000000115/suppl-4061-95/art-20/par-5 - suppl-3551-82/art-63/par-1: 第二十七条第十三項 → 厚生年金保険法 附則第二十七条第十三項 (Supplementary Provisions, Article 27, paragraph (13)), suppl-4061-95/art-27/par-13 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4061-95/art-27/par-13 · https://japanlaw.org/l/329AC0000000115/suppl-4061-95/art-27/par-13 - suppl-3551-82/art-63/par-1: 第十四項 → 厚生年金保険法 附則第二十七条第十四項 (Supplementary Provisions, Article 27, paragraph (14)), suppl-4061-95/art-27/par-14 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4061-95/art-27/par-14 · https://japanlaw.org/l/329AC0000000115/suppl-4061-95/art-27/par-14 - suppl-3551-82/art-63/par-1: 同法第五十条の二 → 厚生年金保険法 第五十条の二 (Article 50-2), art-50-2 — https://japanlaw.org/ja/employees-pension-insurance-act/art-50-2 · https://japanlaw.org/l/329AC0000000115/art-50-2 - suppl-3551-82/art-63/par-1: 同法第六十二条第一項 → 厚生年金保険法 第六十二条第一項 (Article 62, paragraph (1)), art-62/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-62/par-1 · https://japanlaw.org/l/329AC0000000115/art-62/par-1 - suppl-3551-82/art-63/par-1: 昭和六十年改正法附則第七十三条第一項 → 厚生年金保険法 附則第七十三条第一項 (Supplementary Provisions, Article 73, paragraph (1)), suppl-3601-34/art-73/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-73/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-73/par-1 - suppl-3551-82/art-63/par-1: 同法附則第七十四条第一項 → 厚生年金保険法 附則第七十四条第一項 (Supplementary Provisions, Article 74, paragraph (1)), suppl-3601-34/art-74/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-74/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-74/par-1 - suppl-3551-82/art-63/par-1: 第二項 → 厚生年金保険法 附則第七十四条第二項 (Supplementary Provisions, Article 74, paragraph (2)), suppl-3601-34/art-74/par-2 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-74/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-74/par-2 ## Cited by 1 provision cites this one. No official source publishes this direction. - 厚生年金保険法 附則第六十三条第一項（厚生年金保険法による年金額の計算の特例） — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3551-82/art-63/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3551-82/art-63/par-1 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 厚生年金保険法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/329AC0000000115/20261001_507AC0000000074), retrieved 2026-10-13 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Employees' Pension Insurance Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/3554/tb), retrieved 2026-10-13 - claude-sonnet-5-5 — Machine translation, batch employees-pension-insurance-act-20261013T074650-027, translated 2026-10-13 - This site's parser, version 190 — 厚生年金保険法 — structure, counts, cross-references and defined terms, computed 2026-10-13