# 厚生年金保険法 / Employees' Pension Insurance Act — 第五十一条 (Article 51) - 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: 第五十一条 (Article 51) — address `art-51` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/employees-pension-insurance-act/art-51 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/art-51 - 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. --- ### 第五十一条 art-51 · https://japanlaw.org/ja/employees-pension-insurance-act/art-51 · https://japanlaw.org/l/329AC0000000115/art-51 **第一項** 第五十条第一項に定める障害厚生年金の額については、当該障害厚生年金の支給事由となつた障害に係る障害認定日（第四十七条の三第一項の規定による障害厚生年金については同項に規定する基準傷病に係る障害認定日とし、第四十八条第一項の規定による障害厚生年金については併合されたそれぞれの障害に係る障害認定日（第四十七条の三第一項に規定する障害については、同項に規定する基準障害に係る障害認定日）のうちいずれか遅い日とする。）の属する月後における被保険者であつた期間は、その計算の基礎としない。 art-51/par-1 · https://japanlaw.org/ja/employees-pension-insurance-act/art-51/par-1 · https://japanlaw.org/l/329AC0000000115/art-51/par-1 With respect to the amount of an employees' disability pension provided for in Article 50, paragraph (1), the period during which a person was an insured after the month that includes the day of disability assessment for the disability that constitutes the grounds for payment of the relevant employees' disability pension (or, for the employees' disability pension under the provisions of Article 47-3, paragraph (1), the day of disability assessment for the base injury or illness provided for in that paragraph; or, for the employees' disability pension under the provisions of Article 48, paragraph (1), whichever is the latest day among the days of disability assessment for each of the combined disabilities (or, for a disability provided for in Article 47-3, paragraph (1), the day of disability assessment for the base disability provided for in that paragraph)) is not a basis for its calculation. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-51/par-1: 第五十条第一項 → 厚生年金保険法 第五十条第一項 (Article 50, paragraph (1)), art-50/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-50/par-1 · https://japanlaw.org/l/329AC0000000115/art-50/par-1 - art-51/par-1: 第四十七条の三第一項 → 厚生年金保険法 第四十七条の三第一項 (Article 47-3, paragraph (1)), art-47-3/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-47-3/par-1 · https://japanlaw.org/l/329AC0000000115/art-47-3/par-1 - art-51/par-1: 第四十八条第一項 → 厚生年金保険法 第四十八条第一項 (Article 48, paragraph (1)), art-48/par-1 — https://japanlaw.org/ja/employees-pension-insurance-act/art-48/par-1 · https://japanlaw.org/l/329AC0000000115/art-48/par-1 ## Cited by 4 provisions cite this one. No official source publishes this direction. - 厚生年金保険法 附則第四条第一項 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3441-78/art-4/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3441-78/art-4/par-1 - 厚生年金保険法 附則第六十八条第一項 — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-68/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-68/par-1 - 厚生年金保険法 附則第六十九条第一項（障害厚生年金の併給の調整の特例） — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-69/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-69/par-1 - 厚生年金保険法 附則第七十条第一項（障害厚生年金の額の計算の特例） — https://japanlaw.org/ja/employees-pension-insurance-act/suppl-3601-34/art-70/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-70/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