# 厚生年金保険法 / Employees' Pension Insurance Act — 第十九条 (Article 19) - 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: 第十九条 (Article 19) — address `art-19` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/employees-pension-insurance-act/art-19 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/art-19 - 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. --- ### 第十九条 art-19 · https://japanlaw.org/ja/employees-pension-insurance-act/art-19 · https://japanlaw.org/l/329AC0000000115/art-19 **第一項** 被保険者期間を計算する場合には、月によるものとし、被保険者の資格を取得した月からその資格を喪失した月の前月までをこれに算入する。 art-19/par-1 · https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-1 · https://japanlaw.org/l/329AC0000000115/art-19/par-1 When an insured period is calculated, this is done in months; the months from that in which a person acquires the status of an insured to the month preceding that in which the person forfeits that status are used to calculate it. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 被保険者の資格を取得した月にその資格を喪失したときは、その月を一箇月として被保険者期間に算入する。ただし、その月に更に被保険者又は国民年金の被保険者（国民年金法第七条第一項第二号に規定する第二号被保険者を除く。）の資格を取得したときは、この限りでない。 art-19/par-2 · https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-2 · https://japanlaw.org/l/329AC0000000115/art-19/par-2 If, in the same month that a person has acquired the status of an insured, the person forfeits that status, that month is calculated as a one-month long insured period; provided, however, that this does not apply if the person acquires the status of an insured or an insured under a National Pension (excluding a category II insured specified in Article 7, paragraph (1) item (ii) of the National Pension Act) again in that month. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 被保険者の資格を喪失した後、更にその資格を取得した者については、前後の被保険者期間を合算する。 art-19/par-3 · https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-3 · https://japanlaw.org/l/329AC0000000115/art-19/par-3 For a person who has acquired the status of an insured again after having forfeited that status, the previous and subsequent insured periods are added up. Ministry of Justice translation — Japanese Law Translation Database System **第四項** 前三項の規定は、被保険者の種別ごとに適用する。 art-19/par-4 · https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-4 · https://japanlaw.org/l/329AC0000000115/art-19/par-4 The provisions of the preceding three paragraphs apply for each insured category. Ministry of Justice translation — Japanese Law Translation Database System **第五項** 同一の月において被保険者の種別に変更があつたときは、前項の規定により適用するものとされた第二項の規定にかかわらず、その月は変更後の被保険者の種別の被保険者であつた月（二回以上にわたり被保険者の種別に変更があつたときは、最後の被保険者の種別の被保険者であつた月）とみなす。 art-19/par-5 · https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-5 · https://japanlaw.org/l/329AC0000000115/art-19/par-5 Notwithstanding the provisions of paragraph (2) that were to have been applied pursuant to the provisions of the preceding paragraph, if a person has undergone a change of insured categories in the same month, that month is deemed to be a month in which the insured was under the insured category from after the change (if the insured has undergone a change of insured categories twice or more in the same month, that month is deemed to be a month in which the insured was under the last of those insured categories). Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-19/par-2: 国民年金法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-19/par-4: 前三項 → 厚生年金保険法 第十九条第一項 (Article 19, paragraph (1)), art-19/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-1 · https://japanlaw.org/l/329AC0000000115/art-19/par-1 - art-19/par-4: 前三項 → 厚生年金保険法 第十九条第二項 (Article 19, paragraph (2)), art-19/par-2 — https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-2 · https://japanlaw.org/l/329AC0000000115/art-19/par-2 - art-19/par-4: 前三項 → 厚生年金保険法 第十九条第三項 (Article 19, paragraph (3)), art-19/par-3 — https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-3 · https://japanlaw.org/l/329AC0000000115/art-19/par-3 - art-19/par-5: 前項 → 厚生年金保険法 第十九条第四項 (Article 19, paragraph (4)), art-19/par-4 — https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-4 · https://japanlaw.org/l/329AC0000000115/art-19/par-4 - art-19/par-5: 第二項 → 厚生年金保険法 第十九条第二項 (Article 19, paragraph (2)), art-19/par-2 — https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-2 · https://japanlaw.org/l/329AC0000000115/art-19/par-2 ## Cited by 5 provisions cite this one. No official source publishes this direction. - 厚生年金保険法 第十九条第四項 — https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-4 · https://japanlaw.org/l/329AC0000000115/art-19/par-4 - 厚生年金保険法 第十九条第五項 — https://japanlaw.org/ja/employees-pension-insurance-act/art-19/par-5 · https://japanlaw.org/l/329AC0000000115/art-19/par-5 - 厚生年金保険法 附則第四十七条第四項（厚生年金保険の被保険者期間等に関する経過措置） — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-47/par-4 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-47/par-4 - 厚生年金保険法 附則第十六条第一項（厚生年金保険の被保険者期間の計算の特例） — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4121-18/art-16/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4121-18/art-16/par-1 - 厚生年金保険法 附則第六条第一項（厚生年金保険の被保険者期間の計算の特例） — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-4241-63/art-6/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4241-63/art-6/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 - This site's parser, version 190 — 厚生年金保険法 — structure, counts, cross-references and defined terms, computed 2026-10-13