# 厚生年金保険法 / Employees' Pension Insurance Act — 第四条 (Supplementary Provisions, Article 4) - 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: 第四条 (Supplementary Provisions, Article 4) — address `suppl-3441-78/art-4` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/en/employees-pension-insurance-act/suppl-3441-78/art-4 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4 - 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. --- ### 第四条 suppl-3441-78/art-4 · https://japanlaw.org/en/employees-pension-insurance-act/suppl-3441-78/art-4 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4 **第一項** 昭和三十二年十月一日前に被保険者であつた者であつて、同日から昭和五十一年七月三十一日までの被保険者であつた期間（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「昭和六十年改正法」という。）附則第四十七条第一項、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）附則第五条第一項又は厚生年金保険制度及び農林漁業団体職員共済組合制度の統合を図るための農林漁業団体職員共済組合法等を廃止する等の法律（平成十三年法律第百一号）附則第六条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る期間を含む。以下この条において同じ。）が三年以上であるもの（厚生年金保険法第五十一条の規定により障害厚生年金の額の計算の基礎としない被保険者であつた期間があるときは、当該期間を除いた期間が三年以上であるもの）に関し、昭和四十四年十一月一日以後に保険給付を受ける権利を有するに至つた者（国民年金法等の一部を改正する法律（平成十二年法律第十八号。以下この条において「平成十二年改正法」という。）附則第二十条第一項に規定するものに限る。次項において同じ。）に支給する保険給付につきその年金額を計算する場合においては、同項第一号の規定にかかわらず、昭和三十二年十月一日前の被保険者であつた期間は、平均標準報酬月額（平成十二年改正法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。次項において同じ。）の計算の基礎としない。 suppl-3441-78/art-4/par-1 · https://japanlaw.org/en/employees-pension-insurance-act/suppl-3441-78/art-4/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4/par-1 With regard to a person who was an insured before October 1, 1957 and whose period of having been an insured from that day to July 31, 1976 (including a 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 Act Partially Amending the National Pension Act, etc. (Act No. 34 of 1985; hereinafter referred to as the "1985 Amendment Act"), Article 5, paragraph (1) of the Supplementary Provisions of the Act Partially Amending the Employees' Pension Insurance Act, etc. (Act No. 82 of 1996) or Article 6 of the Supplementary Provisions of the Act to Abolish, etc. the Mutual Aid Association Act for Employees of Agricultural, Forestry and Fishery Organizations, etc. for the Purpose of Integrating the Employees' Pension Insurance System and the Mutual Aid Association System for Employees of Agricultural, Forestry and Fishery Organizations (Act No. 101 of 2001); the same applies hereinafter in this Article) is three years or more (where there is a period of having been an insured that, pursuant to the provisions of Article 51 of the Employees' Pension Insurance Act, is not used as the basis for calculating the amount of an employees' disability pension, a person for whom the period excluding that period is three years or more), when the pension amount is calculated for the insurance benefits paid to a person who has come to have the right to receive insurance benefits on or after November 1, 1969 (limited to a person prescribed in Article 20, paragraph (1) of the Supplementary Provisions of the Act Partially Amending the National Pension Act, etc. (Act No. 18 of 2000; hereinafter in this Article referred to as the "2000 Amendment Act"); the same applies in the following paragraph), notwithstanding the provisions of Article 20, paragraph (1), item (i) of the Supplementary Provisions of the 2000 Amendment Act, the period of having been an insured before October 1, 1957 is not used as the basis for calculating the average standardized monthly amount of remuneration (meaning the average standardized monthly amount of remuneration prescribed in Article 43, paragraph (1) of the Employees' Pension Insurance Act prior to its amendment by the provisions of Article 6 of the 2000 Amendment Act; the same applies in the following paragraph). machine translation, not official **第二項** 昭和三十二年十月一日から昭和五十一年七月三十一日までの被保険者であつた期間が三年未満であり、かつ、同日までの被保険者であつた期間が三年以上である者に関し、昭和四十四年十一月一日以後に保険給付を受ける権利を有するに至つた者に支給する保険給付につきその年金額を計算する場合においては、平成十二年改正法附則第二十条第一項第一号の規定にかかわらず、昭和五十一年七月三十一日までの被保険者であつた期間のうち直近の三年間以外の被保険者であつた期間は、平均標準報酬月額の計算の基礎としない。 suppl-3441-78/art-4/par-2 · https://japanlaw.org/en/employees-pension-insurance-act/suppl-3441-78/art-4/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4/par-2 With regard to a person whose period of having been an insured from October 1, 1957 to July 31, 1976 is less than three years and whose period of having been an insured up to that day is three years or more, when the pension amount is calculated for the insurance benefits paid to a person who has come to have the right to receive insurance benefits on or after November 1, 1969, notwithstanding the provisions of Article 20, paragraph (1), item (i) of the Supplementary Provisions of the 2000 Amendment Act, the periods of having been an insured up to July 31, 1976 other than the most recent three years are not used as the basis for calculating the average standardized monthly amount of remuneration. machine translation, not official --- ## Cites - suppl-3441-78/art-4/par-1: 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「昭和六十年改正法」という。）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/en/employees-pension-insurance-act/suppl-3601-34/art-47/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-47/par-1 - suppl-3441-78/art-4/par-1: 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/en/employees-pension-insurance-act/suppl-4081-82/art-5/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4081-82/art-5/par-1 - suppl-3441-78/art-4/par-1: この条 → 厚生年金保険法 附則第四条 (Supplementary Provisions, Article 4), suppl-3441-78/art-4 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3441-78/art-4 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4 - suppl-3441-78/art-4/par-1: 厚生年金保険法第五十一条 → 厚生年金保険法 第五十一条 (Article 51), art-51 — https://japanlaw.org/en/employees-pension-insurance-act/art-51 · https://japanlaw.org/l/329AC0000000115/art-51 - suppl-3441-78/art-4/par-1: 国民年金法等の一部を改正する法律（平成十二年法律第十八号。以下この条において「平成十二年改正法」という。）附則第二十条第一項 → 厚生年金保険法 附則第二十条第一項 (Supplementary Provisions, Article 20, paragraph (1)), suppl-4121-18/art-20/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-4121-18/art-20/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4121-18/art-20/par-1 - suppl-3441-78/art-4/par-1: 次項 → 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/en/employees-pension-insurance-act/suppl-3441-78/art-4/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4/par-2 - suppl-3441-78/art-4/par-2: 平成十二年改正法附則第二十条第一項第一号 → 厚生年金保険法 附則第二十条第一項第一号 (Supplementary Provisions, Article 20, paragraph (1), item (i)), suppl-4121-18/art-20/par-1/item-1 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-4121-18/art-20/par-1/item-1 · https://japanlaw.org/l/329AC0000000115/suppl-4121-18/art-20/par-1/item-1 ## Cited by 5 provisions cite this one. No official source publishes this direction. - 厚生年金保険法 附則第一条第二項第二号（施行期日等） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3441-78/art-1/par-2/item-2 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-1/par-2/item-2 - 厚生年金保険法 附則第四条第一項 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3441-78/art-4/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4/par-1 - 厚生年金保険法 附則第三十五条第一項（厚生年金保険法による平均標準報酬月額の計算の特例） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3511-63/art-35/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3511-63/art-35/par-1 - 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/en/employees-pension-insurance-act/suppl-3551-82/art-63/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3551-82/art-63/par-1 - 厚生年金保険法 附則第五十二条第一項第一号（厚生年金保険の平均標準報酬月額の計算に関する経過措置） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-52/par-1/item-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-52/par-1/item-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-20261013T074650-021, 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