# 国民年金法 / National Pension Act — 第五条 (Article 5) - Law: 国民年金法 (National Pension Act), 昭和三十四年法律第百四十一号 - English title "National Pension Act": Ministry of Justice translation database, which lists the title - 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: 第五条 (Article 5)（用語の定義） — address `art-5` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/national-pension-act/art-5 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/334AC0000000141/art-5 - 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. --- ### 第五条（用語の定義） — Definitions caption: machine translation, not official art-5 · https://japanlaw.org/ja/national-pension-act/art-5 · https://japanlaw.org/l/334AC0000000141/art-5 **第一項** この法律において、「保険料納付済期間」とは、第七条第一項第一号に規定する被保険者としての被保険者期間のうち納付された保険料（第九十六条の規定により徴収された保険料を含み、第九十条の二第一項から第三項までの規定によりその一部の額につき納付することを要しないものとされた保険料につきその残余の額が納付又は徴収されたものを除く。以下同じ。）に係るもの及び第八十八条の二又は第八十八条の三第一項若しくは第二項の規定により納付することを要しないものとされた保険料に係るもの、第七条第一項第二号に規定する被保険者としての被保険者期間並びに同項第三号に規定する被保険者としての被保険者期間を合算した期間をいう。 art-5/par-1 · https://japanlaw.org/ja/national-pension-act/art-5/par-1 · https://japanlaw.org/l/334AC0000000141/art-5/par-1 In this Act, "premium-paid period" means the period obtained by combining: the insured period as an insured person prescribed in Article 7, paragraph (1), item (i), relating to a premium that has been paid (including a premium collected under the provisions of Article 96; but excluding a premium for which, of the amount that a person has been made not required to pay part of under the provisions of Article 90-2, paragraphs (1) through (3), the remaining amount has been paid or collected; the same applies hereinafter) and relating to a premium that a person has been made not required to pay under the provisions of Article 88-2 or Article 88-3, paragraph (1) or (2); the insured period as an insured person prescribed in Article 7, paragraph (1), item (ii); and the insured period as an insured person prescribed in item (iii) of that paragraph. machine translation, not official **第二項** この法律において、「保険料免除期間」とは、保険料全額免除期間、保険料四分の三免除期間、保険料半額免除期間及び保険料四分の一免除期間を合算した期間をいう。 art-5/par-2 · https://japanlaw.org/ja/national-pension-act/art-5/par-2 · https://japanlaw.org/l/334AC0000000141/art-5/par-2 In this Act, "premium exemption period" means the period obtained by combining the full premium exemption period, the three-quarter premium exemption period, the half premium exemption period, and the one-quarter premium exemption period. machine translation, not official **第三項** この法律において、「保険料全額免除期間」とは、第七条第一項第一号に規定する被保険者としての被保険者期間であつて第八十九条第一項、第九十条第一項又は第九十条の三第一項の規定により納付することを要しないものとされた保険料に係るもののうち、第九十四条第四項の規定により納付されたものとみなされる保険料に係る被保険者期間を除いたものを合算した期間をいう。 art-5/par-3 · https://japanlaw.org/ja/national-pension-act/art-5/par-3 · https://japanlaw.org/l/334AC0000000141/art-5/par-3 In this Act, "full premium exemption period" means the total of the insured periods, as an insured person prescribed in Article 7, paragraph (1), item (i), relating to a premium that a person has been made not required to pay under the provisions of Article 89, paragraph (1), Article 90, paragraph (1), or Article 90-3, paragraph (1), after excluding the insured period relating to a premium that is deemed to have been paid under the provisions of Article 94, paragraph (4). machine translation, not official **第四項** この法律において、「保険料四分の三免除期間」とは、第七条第一項第一号に規定する被保険者としての被保険者期間であつて第九十条の二第一項の規定によりその四分の三の額につき納付することを要しないものとされた保険料（納付することを要しないものとされた四分の三の額以外の四分の一の額につき納付されたものに限る。）に係るもののうち、第九十四条第四項の規定により納付されたものとみなされる保険料に係る被保険者期間を除いたものを合算した期間をいう。 art-5/par-4 · https://japanlaw.org/ja/national-pension-act/art-5/par-4 · https://japanlaw.org/l/334AC0000000141/art-5/par-4 In this Act, "three-quarter premium exemption period" means the total of the insured periods, as an insured person prescribed in Article 7, paragraph (1), item (i), relating to a premium for which three-quarters of the amount has been made not required to be paid under the provisions of Article 90-2, paragraph (1) (limited to a premium for which the one-quarter of the amount other than the three-quarters made not required to be paid has been paid), after excluding the insured period relating to a premium that is deemed to have been paid under the provisions of Article 94, paragraph (4). machine translation, not official **第五項** この法律において、「保険料半額免除期間」とは、第七条第一項第一号に規定する被保険者としての被保険者期間であつて第九十条の二第二項の規定によりその半額につき納付することを要しないものとされた保険料（納付することを要しないものとされた半額以外の半額につき納付されたものに限る。）に係るもののうち、第九十四条第四項の規定により納付されたものとみなされる保険料に係る被保険者期間を除いたものを合算した期間をいう。 art-5/par-5 · https://japanlaw.org/ja/national-pension-act/art-5/par-5 · https://japanlaw.org/l/334AC0000000141/art-5/par-5 In this Act, "half premium exemption period" means the total of the insured periods, as an insured person prescribed in Article 7, paragraph (1), item (i), relating to a premium for which half of the amount has been made not required to be paid under the provisions of Article 90-2, paragraph (2) (limited to a premium for which the half of the amount other than the half made not required to be paid has been paid), after excluding the insured period relating to a premium that is deemed to have been paid under the provisions of Article 94, paragraph (4). machine translation, not official **第六項** この法律において、「保険料四分の一免除期間」とは、第七条第一項第一号に規定する被保険者としての被保険者期間であつて第九十条の二第三項の規定によりその四分の一の額につき納付することを要しないものとされた保険料（納付することを要しないものとされた四分の一の額以外の四分の三の額につき納付されたものに限る。）に係るもののうち、第九十四条第四項の規定により納付されたものとみなされる保険料に係る被保険者期間を除いたものを合算した期間をいう。 art-5/par-6 · https://japanlaw.org/ja/national-pension-act/art-5/par-6 · https://japanlaw.org/l/334AC0000000141/art-5/par-6 In this Act, "one-quarter premium exemption period" means the total of the insured periods, as an insured person prescribed in Article 7, paragraph (1), item (i), relating to a premium for which one-quarter of the amount has been made not required to be paid under the provisions of Article 90-2, paragraph (3) (limited to a premium for which the three-quarters of the amount other than the one-quarter made not required to be paid has been paid), after excluding the insured period relating to a premium that is deemed to have been paid under the provisions of Article 94, paragraph (4). machine translation, not official **第七項** この法律において、「配偶者」、「夫」及び「妻」には、婚姻の届出をしていないが、事実上婚姻関係と同様の事情にある者を含むものとする。 art-5/par-7 · https://japanlaw.org/ja/national-pension-act/art-5/par-7 · https://japanlaw.org/l/334AC0000000141/art-5/par-7 In this Act, "spouse", "husband", and "wife" include a person who has not made a notification of marriage but is in circumstances equivalent to a de facto marital relationship. machine translation, not official **第八項** この法律において、「政府及び実施機関」とは、厚生年金保険の実施者たる政府及び実施機関たる共済組合等をいう。 art-5/par-8 · https://japanlaw.org/ja/national-pension-act/art-5/par-8 · https://japanlaw.org/l/334AC0000000141/art-5/par-8 In this Act, "the government and implementing bodies" means the government as the implementer of Employees' Pension Insurance, and the mutual aid associations, etc. as implementing bodies. machine translation, not official **第九項** この法律において、「実施機関たる共済組合等」とは、厚生年金保険の実施機関たる国家公務員共済組合連合会、地方公務員共済組合連合会又は日本私立学校振興・共済事業団をいう。 art-5/par-9 · https://japanlaw.org/ja/national-pension-act/art-5/par-9 · https://japanlaw.org/l/334AC0000000141/art-5/par-9 In this Act, "mutual aid associations, etc. as implementing bodies" means the Federation of National Public Service Personnel Mutual Aid Associations, the Pension Fund Association for Local Government Officials, or the Promotion and Mutual Aid Corporation for Private Schools of Japan, as implementing bodies of Employees' Pension Insurance. machine translation, not official --- ## Cites - art-5/par-1: 第七条第一項第一号 → 国民年金法 第七条第一項第一号 (Article 7, paragraph (1), item (i)), art-7/par-1/item-1 — https://japanlaw.org/ja/national-pension-act/art-7/par-1/item-1 · https://japanlaw.org/l/334AC0000000141/art-7/par-1/item-1 - art-5/par-1: 第九十六条 → 国民年金法 第九十六条 (Article 96), art-96 — https://japanlaw.org/ja/national-pension-act/art-96 · https://japanlaw.org/l/334AC0000000141/art-96 - art-5/par-1: 第九十条の二第一項から第三項まで → 国民年金法 第九十条の二第一項 (Article 90-2, paragraph (1)), art-90-2/par-1 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-1 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-1 - art-5/par-1: 第九十条の二第一項から第三項まで → 国民年金法 第九十条の二第二項 (Article 90-2, paragraph (2)), art-90-2/par-2 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-2 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-2 - art-5/par-1: 第九十条の二第一項から第三項まで → 国民年金法 第九十条の二第三項 (Article 90-2, paragraph (3)), art-90-2/par-3 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-3 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-3 - art-5/par-1: 第八十八条の二 → 国民年金法 第八十八条の二 (Article 88-2), art-88-2 — https://japanlaw.org/ja/national-pension-act/art-88-2 · https://japanlaw.org/l/334AC0000000141/art-88-2 - art-5/par-1: 第八十八条の三第一項 → 国民年金法 第八十八条の三第一項 (Article 88-3, paragraph (1)), art-88-3/par-1 — https://japanlaw.org/ja/national-pension-act/art-88-3/par-1 · https://japanlaw.org/l/334AC0000000141/art-88-3/par-1 - art-5/par-1: 第二項 → 国民年金法 第八十八条の三第二項 (Article 88-3, paragraph (2)), art-88-3/par-2 — https://japanlaw.org/ja/national-pension-act/art-88-3/par-2 · https://japanlaw.org/l/334AC0000000141/art-88-3/par-2 - art-5/par-1: 第七条第一項第二号 → 国民年金法 第七条第一項第二号 (Article 7, paragraph (1), item (ii)), art-7/par-1/item-2 — https://japanlaw.org/ja/national-pension-act/art-7/par-1/item-2 · https://japanlaw.org/l/334AC0000000141/art-7/par-1/item-2 - art-5/par-1: 同項第三号 → 国民年金法 第七条第一項第三号 (Article 7, paragraph (1), item (iii)), art-7/par-1/item-3 — https://japanlaw.org/ja/national-pension-act/art-7/par-1/item-3 · https://japanlaw.org/l/334AC0000000141/art-7/par-1/item-3 - art-5/par-3: 第七条第一項第一号 → 国民年金法 第七条第一項第一号 (Article 7, paragraph (1), item (i)), art-7/par-1/item-1 — https://japanlaw.org/ja/national-pension-act/art-7/par-1/item-1 · https://japanlaw.org/l/334AC0000000141/art-7/par-1/item-1 - art-5/par-3: 第八十九条第一項 → 国民年金法 第八十九条第一項 (Article 89, paragraph (1)), art-89/par-1 — https://japanlaw.org/ja/national-pension-act/art-89/par-1 · https://japanlaw.org/l/334AC0000000141/art-89/par-1 - art-5/par-3: 第九十条第一項 → 国民年金法 第九十条第一項 (Article 90, paragraph (1)), art-90/par-1 — https://japanlaw.org/ja/national-pension-act/art-90/par-1 · https://japanlaw.org/l/334AC0000000141/art-90/par-1 - art-5/par-3: 第九十条の三第一項 → 国民年金法 第九十条の三第一項 (Article 90-3, paragraph (1)), art-90-3/par-1 — https://japanlaw.org/ja/national-pension-act/art-90-3/par-1 · https://japanlaw.org/l/334AC0000000141/art-90-3/par-1 - art-5/par-3: 第九十四条第四項 → 国民年金法 第九十四条第四項 (Article 94, paragraph (4)), art-94/par-4 — https://japanlaw.org/ja/national-pension-act/art-94/par-4 · https://japanlaw.org/l/334AC0000000141/art-94/par-4 - art-5/par-4: 第七条第一項第一号 → 国民年金法 第七条第一項第一号 (Article 7, paragraph (1), item (i)), art-7/par-1/item-1 — https://japanlaw.org/ja/national-pension-act/art-7/par-1/item-1 · https://japanlaw.org/l/334AC0000000141/art-7/par-1/item-1 - art-5/par-4: 第九十条の二第一項 → 国民年金法 第九十条の二第一項 (Article 90-2, paragraph (1)), art-90-2/par-1 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-1 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-1 - art-5/par-4: 第九十四条第四項 → 国民年金法 第九十四条第四項 (Article 94, paragraph (4)), art-94/par-4 — https://japanlaw.org/ja/national-pension-act/art-94/par-4 · https://japanlaw.org/l/334AC0000000141/art-94/par-4 - art-5/par-5: 第七条第一項第一号 → 国民年金法 第七条第一項第一号 (Article 7, paragraph (1), item (i)), art-7/par-1/item-1 — https://japanlaw.org/ja/national-pension-act/art-7/par-1/item-1 · https://japanlaw.org/l/334AC0000000141/art-7/par-1/item-1 - art-5/par-5: 第九十条の二第二項 → 国民年金法 第九十条の二第二項 (Article 90-2, paragraph (2)), art-90-2/par-2 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-2 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-2 - art-5/par-5: 第九十四条第四項 → 国民年金法 第九十四条第四項 (Article 94, paragraph (4)), art-94/par-4 — https://japanlaw.org/ja/national-pension-act/art-94/par-4 · https://japanlaw.org/l/334AC0000000141/art-94/par-4 - art-5/par-6: 第七条第一項第一号 → 国民年金法 第七条第一項第一号 (Article 7, paragraph (1), item (i)), art-7/par-1/item-1 — https://japanlaw.org/ja/national-pension-act/art-7/par-1/item-1 · https://japanlaw.org/l/334AC0000000141/art-7/par-1/item-1 - art-5/par-6: 第九十条の二第三項 → 国民年金法 第九十条の二第三項 (Article 90-2, paragraph (3)), art-90-2/par-3 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-3 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-3 - art-5/par-6: 第九十四条第四項 → 国民年金法 第九十四条第四項 (Article 94, paragraph (4)), art-94/par-4 — https://japanlaw.org/ja/national-pension-act/art-94/par-4 · https://japanlaw.org/l/334AC0000000141/art-94/par-4 ## Cited by 31 provisions cite this one. No official source publishes this direction. - 厚生年金保険法 第三条第一項第一号（用語の定義） — https://japanlaw.org/ja/employees-pension-insurance-act/art-3/par-1/item-1 · https://japanlaw.org/l/329AC0000000115/art-3/par-1/item-1 - 厚生年金保険法 第三条第一項第二号（用語の定義） — https://japanlaw.org/ja/employees-pension-insurance-act/art-3/par-1/item-2 · https://japanlaw.org/l/329AC0000000115/art-3/par-1/item-2 - 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/ja/employees-pension-insurance-act/suppl-3551-82/art-1/par-2/item-2 · https://japanlaw.org/l/329AC0000000115/suppl-3551-82/art-1/par-2/item-2 - 厚生年金保険法 附則第五条第一項第九号（用語の定義） — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-5/par-1/item-9 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-5/par-1/item-9 - 国民年金法 第九十条第一項 — https://japanlaw.org/ja/national-pension-act/art-90/par-1 · https://japanlaw.org/l/334AC0000000141/art-90/par-1 - 国民年金法 第九十条の二第一項 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-1 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-1 - 国民年金法 第九十条の二第二項 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-2 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-2 - 国民年金法 第九十条の二第三項 — https://japanlaw.org/ja/national-pension-act/art-90-2/par-3 · https://japanlaw.org/l/334AC0000000141/art-90-2/par-3 - 国民年金法 第九十条の三第一項 — https://japanlaw.org/ja/national-pension-act/art-90-3/par-1 · https://japanlaw.org/l/334AC0000000141/art-90-3/par-1 - 国民年金法 第九十二条の四第三項 — https://japanlaw.org/ja/national-pension-act/art-92-4/par-3 · https://japanlaw.org/l/334AC0000000141/art-92-4/par-3 - 国民年金法 第九十二条の四第四項 — https://japanlaw.org/ja/national-pension-act/art-92-4/par-4 · https://japanlaw.org/l/334AC0000000141/art-92-4/par-4 - 国民年金法 附則第五条第九項（任意加入被保険者） — https://japanlaw.org/ja/national-pension-act/suppl-3341-141/art-5/par-9 · https://japanlaw.org/l/334AC0000000141/suppl-3341-141/art-5/par-9 - 国民年金法 附則第七条の二第一項（被保険者期間に関する特例） — https://japanlaw.org/ja/national-pension-act/suppl-3341-141/art-7-2/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-3341-141/art-7-2/par-1 - 国民年金法 附則第七条の三第一項 — https://japanlaw.org/ja/national-pension-act/suppl-3341-141/art-7-3/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-3341-141/art-7-3/par-1 - 国民年金法 附則第十九条第一項第四号 — https://japanlaw.org/ja/national-pension-act/suppl-3481-92/art-19/par-1/item-4 · https://japanlaw.org/l/334AC0000000141/suppl-3481-92/art-19/par-1/item-4 - 国民年金法 附則第一条第二項第二号（施行期日等） — https://japanlaw.org/ja/national-pension-act/suppl-3551-82/art-1/par-2/item-2 · https://japanlaw.org/l/334AC0000000141/suppl-3551-82/art-1/par-2/item-2 - 国民年金法 附則第五条第一項第九号（用語の定義） — https://japanlaw.org/ja/national-pension-act/suppl-3601-34/art-5/par-1/item-9 · https://japanlaw.org/l/334AC0000000141/suppl-3601-34/art-5/par-1/item-9 - 国民年金法 附則第八条第四項（国民年金の被保険者期間等の特例） — https://japanlaw.org/ja/national-pension-act/suppl-3601-34/art-8/par-4 · https://japanlaw.org/l/334AC0000000141/suppl-3601-34/art-8/par-4 - 国民年金法 附則第四条第三項（国民年金の被保険者期間の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4011-86/art-4/par-3 · https://japanlaw.org/l/334AC0000000141/suppl-4011-86/art-4/par-3 - 国民年金法 附則第十条第一項（第三号被保険者の届出の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4061-95/art-10/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-4061-95/art-10/par-1 - 国民年金法 附則第十一条第九項（任意加入被保険者の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4061-95/art-11/par-9 · https://japanlaw.org/l/334AC0000000141/suppl-4061-95/art-11/par-9 - 国民年金法 附則第十九条第一項（国民年金の保険料の免除の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4161-104/art-19/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-4161-104/art-19/par-1 - 国民年金法 附則第十九条第二項（国民年金の保険料の免除の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4161-104/art-19/par-2 · https://japanlaw.org/l/334AC0000000141/suppl-4161-104/art-19/par-2 - 国民年金法 附則第二十一条第一項（第三号被保険者の届出の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4161-104/art-21/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-4161-104/art-21/par-1 - 国民年金法 附則第二十三条第九項（任意加入被保険者の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4161-104/art-23/par-9 · https://japanlaw.org/l/334AC0000000141/suppl-4161-104/art-23/par-9 - 国民年金法 附則第十条第一項（国民年金任意加入期間の合算対象期間算入に関する経過措置） — https://japanlaw.org/ja/national-pension-act/suppl-4241-62/art-10/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-4241-62/art-10/par-1 - 国民年金法 附則第十二条第一項 — https://japanlaw.org/ja/national-pension-act/suppl-4241-62/art-12/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-4241-62/art-12/par-1 - 国民年金法 附則第十条第一項（国民年金の保険料の納付の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4261-64/art-10/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-4261-64/art-10/par-1 - 国民年金法 附則第十四条第一項（国民年金の保険料の免除の特例） — https://japanlaw.org/ja/national-pension-act/suppl-4261-64/art-14/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-4261-64/art-14/par-1 - 国民年金法 附則第五条第一項（国民年金法による脱退一時金の額に関する経過措置） — https://japanlaw.org/ja/national-pension-act/suppl-5021-40/art-5/par-1 · https://japanlaw.org/l/334AC0000000141/suppl-5021-40/art-5/par-1 - 国民年金法 附則第四十条第九項（任意加入被保険者の特例） — https://japanlaw.org/ja/national-pension-act/suppl-5071-74/art-40/par-9 · https://japanlaw.org/l/334AC0000000141/suppl-5071-74/art-40/par-9 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 国民年金法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/334AC0000000141/20261001_507AC0000000074), retrieved 2026-10-05 - Japanese Law Translation Database System, Ministry of Justice (法務省) — 国民年金法 — its English title as the Ministry of Justice's translation database lists it (https://www.japaneselawtranslation.go.jp/en/laws/view/1772), retrieved 2026-09-18 - claude-sonnet-5 — Machine translation, batch national-pension-act-20260923T214903-001, translated 2026-09-24 - claude-opus-5-5 — Machine translation, batch national-pension-act-20261005T061954-001, translated 2026-10-05 - This site's parser, version 211 — 国民年金法 — structure, counts, cross-references and defined terms, computed 2026-10-05