# 厚生年金保険法 / Employees' Pension Insurance Act — 第二十三条の三 (Article 23-3) - 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: 第二十三条の三 (Article 23-3)（産前産後休業を終了した際の改定） — address `art-23-3` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/en/employees-pension-insurance-act/art-23-3 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/art-23-3 - 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. --- ### 第二十三条の三（産前産後休業を終了した際の改定） — (Revision at the End of Maternity Leave) caption: Ministry of Justice translation — Japanese Law Translation Database System art-23-3 · https://japanlaw.org/en/employees-pension-insurance-act/art-23-3 · https://japanlaw.org/l/329AC0000000115/art-23-3 **第一項** 実施機関は、産前産後休業（出産の日（出産の日が出産の予定日後であるときは、出産の予定日）以前四十二日（多胎妊娠の場合においては、九十八日）から出産の日後五十六日までの間において労務に従事しないこと（妊娠又は出産に関する事由を理由として労務に従事しない場合に限る。）をいい、船員（国家公務員共済組合の組合員たる船員及び地方公務員共済組合の組合員たる船員を除く。以下同じ。）たる被保険者にあつては、船員法第八十七条第一項又は第二項の規定により職務に服さないことをいう。以下同じ。）を終了した被保険者が、当該産前産後休業を終了した日（以下この条において「産前産後休業終了日」という。）において当該産前産後休業に係る子を養育する場合において、その使用される事業所の事業主を経由して主務省令で定めるところにより実施機関に申出をしたときは、第二十一条の規定にかかわらず、産前産後休業終了日の翌日が属する月以後三月間（産前産後休業終了日の翌日において使用される事業所で継続して使用された期間に限るものとし、かつ、報酬支払の基礎となつた日数が十七日未満である月があるときは、その月を除く。）に受けた報酬の総額をその期間の月数で除して得た額を報酬月額として、標準報酬月額を改定する。ただし、産前産後休業終了日の翌日に育児休業等を開始している被保険者は、この限りでない。 art-23-3/par-1 · https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-1 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-1 Notwithstanding the provisions of Article 21, if, on the day on which an insured's maternity leave (meaning non-engagement in work (but only if the insured is not working for reasons related to pregnancy or childbirth) for the period from 42 days (98 days in the case of a multiple pregnancy) before the day of childbirth (or before the due date, if the day of childbirth is after the due date) until 56 days following the date of childbirth; and, in the case of an insured who is a mariner (excluding a mariner who is a member of a national public service personnel mutual aid associations or a mutual aid association of local government officials; the same applies hereinafter), meaning not engaging in duties pursuant to the provisions of Article 87, paragraph (1) or paragraph (2) of the Mariners Act; the same applies hereinafter) ends (hereinafter referred to as the "maternity leave end date" in this Article) the insured whose maternity leave has ended is raising the child for whom the insured was taking that maternity leave and files a request with an implementing organization as provided for by order of the competent ministry through the employer of the place of business at which the insured is employed, the implementing organization revises the insured's standard amount of remuneration by regarding the amount arrived at when the total amount of remuneration during the three-month period beginning from the month in which the day following the maternity leave end date falls (limited to a period during which the insured continues to be employed at the place of business at which the insured was employed on the day following the maternity leave end date, and excluding any month which has fewer than seventeen days which forms the basis for payment of remuneration) is divided by the number of months in that period, as the insured's monthly remuneration; provided, however, that this does not apply to an insured who starts childcare/parental leave on the day following the maternity leave end date. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 前項の規定によつて改定された標準報酬月額は、産前産後休業終了日の翌日から起算して二月を経過した日の属する月の翌月からその年の八月（当該翌月が七月から十二月までのいずれかの月である場合は、翌年の八月）までの各月の標準報酬月額とする。 art-23-3/par-2 · https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-2 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-2 A standardized monthly amount of remuneration that has been revised pursuant to the provisions of the preceding paragraph is the standardized monthly amount of remuneration for each month during the period from the month following the month that contains the day that is calculated as falling two months after the day after the maternity leave end date until August of that year (or until August of the following year, if the relevant following month is any month from July to December). Ministry of Justice translation — Japanese Law Translation Database System **第三項** 第二号厚生年金被保険者及び第三号厚生年金被保険者について、第一項の規定を適用する場合においては、同項中「その使用される事業所の事業主を経由して主務省令」とあるのは、「主務省令」とする。 art-23-3/par-3 · https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-3 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-3 When the provisions of paragraph (1) are applied to a category II EPI insured or a category III EPI insured, the phrase "order of the competent ministry through the employer of the place of business at which the insured is employed" in that paragraph is deemed to be the phrase "order of the competent ministry". Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-23-3/par-1: 船員法第八十七条第一項 → e-Gov law 322AC0000000100, 第八十七条第一項 (Article 87, paragraph (1)), art-87/par-1 — not held in this collection - art-23-3/par-1: 第二項 → e-Gov law 322AC0000000100, 第八十七条第二項 (Article 87, paragraph (2)), art-87/par-2 — not held in this collection - art-23-3/par-1: この条 → 厚生年金保険法 第二十三条の三 (Article 23-3), art-23-3 — https://japanlaw.org/en/employees-pension-insurance-act/art-23-3 · https://japanlaw.org/l/329AC0000000115/art-23-3 - art-23-3/par-1: 第二十一条 → 厚生年金保険法 第二十一条 (Article 21), art-21 — https://japanlaw.org/en/employees-pension-insurance-act/art-21 · https://japanlaw.org/l/329AC0000000115/art-21 - art-23-3/par-2: 前項 → 厚生年金保険法 第二十三条の三第一項 (Article 23-3, paragraph (1)), art-23-3/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-1 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-1 - art-23-3/par-3: 第一項 → 厚生年金保険法 第二十三条の三第一項 (Article 23-3, paragraph (1)), art-23-3/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-1 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-1 ## Cited by 14 provisions cite this one. No official source publishes this direction. - 厚生年金保険法 第二十一条第一項（定時決定） — https://japanlaw.org/en/employees-pension-insurance-act/art-21/par-1 · https://japanlaw.org/l/329AC0000000115/art-21/par-1 - 厚生年金保険法 第二十一条第三項（定時決定） — https://japanlaw.org/en/employees-pension-insurance-act/art-21/par-3 · https://japanlaw.org/l/329AC0000000115/art-21/par-3 - 厚生年金保険法 第二十三条の二第一項（育児休業等を終了した際の改定） — https://japanlaw.org/en/employees-pension-insurance-act/art-23-2/par-1 · https://japanlaw.org/l/329AC0000000115/art-23-2/par-1 - 厚生年金保険法 第二十三条の三第一項（産前産後休業を終了した際の改定） — https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-1 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-1 - 厚生年金保険法 第二十三条の三第二項（産前産後休業を終了した際の改定） — https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-2 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-2 - 厚生年金保険法 第二十三条の三第三項（産前産後休業を終了した際の改定） — https://japanlaw.org/en/employees-pension-insurance-act/art-23-3/par-3 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-3 - 厚生年金保険法 第二十四条第一項（報酬月額の算定の特例） — https://japanlaw.org/en/employees-pension-insurance-act/art-24/par-1 · https://japanlaw.org/l/329AC0000000115/art-24/par-1 - 厚生年金保険法 第二十四条第二項（報酬月額の算定の特例） — https://japanlaw.org/en/employees-pension-insurance-act/art-24/par-2 · https://japanlaw.org/l/329AC0000000115/art-24/par-2 - 厚生年金保険法 第二十四条の二第一項（船員たる被保険者の標準報酬月額） — https://japanlaw.org/en/employees-pension-insurance-act/art-24-2/par-1 · https://japanlaw.org/l/329AC0000000115/art-24-2/par-1 - 厚生年金保険法 第二十四条の三第一項（政令への委任） — https://japanlaw.org/en/employees-pension-insurance-act/art-24-3/par-1 · https://japanlaw.org/l/329AC0000000115/art-24-3/par-1 - 厚生年金保険法 第四十六条第二項（支給停止） — https://japanlaw.org/en/employees-pension-insurance-act/art-46/par-2 · https://japanlaw.org/l/329AC0000000115/art-46/par-2 - 厚生年金保険法 第百条の四第一項第四号（機構への厚生労働大臣の権限に係る事務の委任） — https://japanlaw.org/en/employees-pension-insurance-act/art-100-4/par-1/item-4 · https://japanlaw.org/l/329AC0000000115/art-100-4/par-1/item-4 - 厚生年金保険法 附則第五十条第三項 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-50/par-3 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-50/par-3 - 厚生年金保険法 附則第十八条第一項（厚生年金保険の産前産後休業を終了した際の改定に関する経過措置） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-4241-62/art-18/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4241-62/art-18/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