# 厚生年金保険法 / Employees' Pension Insurance Act — 第二十一条 (Article 21) - 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: 第二十一条 (Article 21)（定時決定） — address `art-21` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/employees-pension-insurance-act/art-21 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/art-21 - 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. --- ### 第二十一条（定時決定） — (Periodically Scheduled Decisions) caption: Ministry of Justice translation — Japanese Law Translation Database System art-21 · https://japanlaw.org/ja/employees-pension-insurance-act/art-21 · https://japanlaw.org/l/329AC0000000115/art-21 **第一項** 実施機関は、被保険者が毎年七月一日現に使用される事業所において同日前三月間（その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（厚生労働省令で定める者にあつては、十一日。第二十三条第一項、第二十三条の二第一項及び第二十三条の三第一項において同じ。）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、標準報酬月額を決定する。 art-21/par-1 · https://japanlaw.org/ja/employees-pension-insurance-act/art-21/par-1 · https://japanlaw.org/l/329AC0000000115/art-21/par-1 Every year, the implementing organization decides an insured's standardized monthly amount of remuneration based on the insured's amount of monthly remuneration, which is calculated by dividing the total remuneration which the insured receives during a three-month period prior to July 1 in the year in question at the place of business where the insured is actually employed as of that date by the number of months in that period (the period mentioned above is limited to a period during which the insured was continuously employed at the place of business; and, if there is any month which has fewer than seventeen days (or fewer than eleven days, for a person as specified by Order of the Ministry of Health, Labour and Welfare; the same applies for Article 23, paragraph (1), Article 23-2, paragraph (1) and Article 23-3, paragraph (1)) which forms the basis for the remuneration of remuneration, that month is excluded from the abovementioned period). Ministry of Justice translation — Japanese Law Translation Database System **第二項** 前項の規定によつて決定された標準報酬月額は、その年の九月から翌年の八月までの各月の標準報酬月額とする。 art-21/par-2 · https://japanlaw.org/ja/employees-pension-insurance-act/art-21/par-2 · https://japanlaw.org/l/329AC0000000115/art-21/par-2 The standardized monthly amount of remuneration decided upon pursuant to the provisions of the preceding paragraph is the standardized monthly amount of remuneration for each month from September of that year to August of the next year. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 第一項の規定は、六月一日から七月一日までの間に被保険者の資格を取得した者及び第二十三条、第二十三条の二又は第二十三条の三の規定により七月から九月までのいずれかの月から標準報酬月額を改定され、又は改定されるべき被保険者については、その年に限り適用しない。 art-21/par-3 · https://japanlaw.org/ja/employees-pension-insurance-act/art-21/par-3 · https://japanlaw.org/l/329AC0000000115/art-21/par-3 The provisions of paragraph (1) do not apply to a person who has acquired the status of an insured between June 1 and July 1, nor to those a person whose standardized monthly amount of remuneration is or will be revised in any month between July and September pursuant to the provisions of Article 23, Article 23-2 or Article 23-3, but only in the year in question. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-21/par-1: 第二十三条第一項 → 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/ja/employees-pension-insurance-act/art-23/par-1 · https://japanlaw.org/l/329AC0000000115/art-23/par-1 - art-21/par-1: 第二十三条の二第一項 → 厚生年金保険法 第二十三条の二第一項 (Article 23-2, paragraph (1)), art-23-2/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-23-2/par-1 · https://japanlaw.org/l/329AC0000000115/art-23-2/par-1 - art-21/par-1: 第二十三条の三第一項 → 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/ja/employees-pension-insurance-act/art-23-3/par-1 · https://japanlaw.org/l/329AC0000000115/art-23-3/par-1 - art-21/par-2: 前項 → 厚生年金保険法 第二十一条第一項 (Article 21, paragraph (1)), art-21/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-21/par-1 · https://japanlaw.org/l/329AC0000000115/art-21/par-1 - art-21/par-3: 第一項 → 厚生年金保険法 第二十一条第一項 (Article 21, paragraph (1)), art-21/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-21/par-1 · https://japanlaw.org/l/329AC0000000115/art-21/par-1 - art-21/par-3: 第二十三条 → 厚生年金保険法 第二十三条 (Article 23), art-23 — https://japanlaw.org/ja/employees-pension-insurance-act/art-23 · https://japanlaw.org/l/329AC0000000115/art-23 - art-21/par-3: 第二十三条の二 → 厚生年金保険法 第二十三条の二 (Article 23-2), art-23-2 — https://japanlaw.org/ja/employees-pension-insurance-act/art-23-2 · https://japanlaw.org/l/329AC0000000115/art-23-2 - art-21/par-3: 第二十三条の三 → 厚生年金保険法 第二十三条の三 (Article 23-3), art-23-3 — https://japanlaw.org/ja/employees-pension-insurance-act/art-23-3 · https://japanlaw.org/l/329AC0000000115/art-23-3 ## Cited by 11 provisions cite this one. No official source publishes this direction. - 厚生年金保険法 第二十一条第二項（定時決定） — https://japanlaw.org/ja/employees-pension-insurance-act/art-21/par-2 · https://japanlaw.org/l/329AC0000000115/art-21/par-2 - 厚生年金保険法 第二十一条第三項（定時決定） — https://japanlaw.org/ja/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/ja/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/ja/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 第二十四条第一項（報酬月額の算定の特例） — https://japanlaw.org/ja/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/ja/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/ja/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/ja/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/ja/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/ja/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/ja/employees-pension-insurance-act/suppl-3601-34/art-50/par-3 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-50/par-3 --- ## 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