# 厚生年金保険法 / Employees' Pension Insurance Act — 第二十三条 (Article 23) - 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 (Article 23)（改定） — address `art-23` - 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 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/art-23 - 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（改定） — (Revision) caption: Ministry of Justice translation — Japanese Law Translation Database System art-23 · https://japanlaw.org/en/employees-pension-insurance-act/art-23 · https://japanlaw.org/l/329AC0000000115/art-23 **第一項** 実施機関は、被保険者が現に使用される事業所において継続した三月間（各月とも、報酬支払の基礎となつた日数が、十七日以上でなければならない。）に受けた報酬の総額を三で除して得た額が、その者の標準報酬月額の基礎となつた報酬月額に比べて、著しく高低を生じた場合において、必要があると認めるときは、その額を報酬月額として、その著しく高低を生じた月の翌月から、標準報酬月額を改定することができる。 art-23/par-1 · https://japanlaw.org/en/employees-pension-insurance-act/art-23/par-1 · https://japanlaw.org/l/329AC0000000115/art-23/par-1 If the amount arrived at when the total amount of remuneration an insured has received during a continuous period of three months at the place of business at which the insured is employed at the time in question (the number of days forming the basis for the payment of remuneration is seventeen days or more in each month) is divided by three is significantly higher or lower than the amount of monthly remuneration that formed the basis for the standardized monthly amount of remuneration and the implementing organization finds it to be necessary to do so, it may regard the amount so calculated as the amount of monthly remuneration and revise the amount of standardized remuneration beginning in the month following the month in which that significant high or low occurred. 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、その年の八月（七月から十二月までのいずれかの月から改定されたものについては、翌年の八月）までの各月の標準報酬月額とする。 art-23/par-2 · https://japanlaw.org/en/employees-pension-insurance-act/art-23/par-2 · https://japanlaw.org/l/329AC0000000115/art-23/par-2 A standardized monthly amount of remuneration that has been revised in accordance with the provisions of the preceding paragraph is the standardized monthly amount of remuneration for each month up until August of that year (or up until August of the following year, for standardized monthly amounts of remuneration revised in any month from July to December). Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-23/par-2: 前項 → 厚生年金保険法 第二十三条第一項 (Article 23, paragraph (1)), art-23/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/art-23/par-1 · https://japanlaw.org/l/329AC0000000115/art-23/par-1 ## Cited by 13 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 第二十三条第二項（改定） — https://japanlaw.org/en/employees-pension-insurance-act/art-23/par-2 · https://japanlaw.org/l/329AC0000000115/art-23/par-2 - 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 附則第五条第二項（標準報酬に関する経過措置） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3291-115/art-5/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-5/par-2 - 厚生年金保険法 附則第三十九条第一項（第二条の規定の施行に伴う経過措置） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-39/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-39/par-1 - 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 附則第五条第一項（標準報酬月額に関する経過措置） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-4121-18/art-5/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4121-18/art-5/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