# 厚生年金保険法 / Employees' Pension Insurance Act — 第五十二条 (Article 52) - 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: 第五十二条 (Article 52) — address `art-52` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/en/employees-pension-insurance-act/art-52 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/329AC0000000115/art-52 - 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. --- ### 第五十二条 art-52 · https://japanlaw.org/en/employees-pension-insurance-act/art-52 · https://japanlaw.org/l/329AC0000000115/art-52 **第一項** 実施機関は、障害厚生年金の受給権者について、その障害の程度を診査し、その程度が従前の障害等級以外の障害等級に該当すると認めるときは、その程度に応じて、障害厚生年金の額を改定することができる。 art-52/par-1 · https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-1 · https://japanlaw.org/l/329AC0000000115/art-52/par-1 If the implementing organization examines the severity of the disability of a beneficiary of the employees' disability pension and finds its degree of severity to be classified as any disability grade other than the previous one, the Minister may revise the amount of the employees' disability pension in accordance with its severity. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 障害厚生年金の受給権者は、実施機関に対し、障害の程度が増進したことによる障害厚生年金の額の改定を請求することができる。 art-52/par-2 · https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-2 · https://japanlaw.org/l/329AC0000000115/art-52/par-2 A beneficiary of an employees' disability pension may request the implementing organization to revise the amount of employees' disability pension on account that the severity of disability has worsen. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 前項の請求は、障害厚生年金の受給権者の障害の程度が増進したことが明らかである場合として厚生労働省令で定める場合を除き、当該障害厚生年金の受給権を取得した日又は第一項の規定による実施機関の診査を受けた日から起算して一年を経過した日後でなければ行うことができない。 art-52/par-3 · https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-3 · https://japanlaw.org/l/329AC0000000115/art-52/par-3 A request under the preceding paragraph may only be made after one year has passed since the day on which the beneficiary acquired a right to benefits under an employees' disability pension or underwent an examination by the implementing organization pursuant to the provisions of paragraph (1), except in a case specified by Order of the Ministry of Health, Labour and Welfare as one in which it is clear that the severity of disability of the beneficiary of the employees' disability pension has worsen. Ministry of Justice translation — Japanese Law Translation Database System **第四項** 障害厚生年金の受給権者であつて、疾病にかかり、又は負傷し、かつ、その傷病（当該障害厚生年金の支給事由となつた障害に係る傷病の初診日後に初診日があるものに限る。以下この項及び第五十四条第二項ただし書において同じ。）に係る当該初診日において被保険者であつたものが、当該傷病により障害（障害等級の一級又は二級に該当しない程度のものに限る。以下この項及び同条第二項ただし書において「その他障害」という。）の状態にあり、かつ、当該傷病に係る障害認定日以後六十五歳に達する日の前日までの間において、当該障害厚生年金の支給事由となつた障害とその他障害（その他障害が二以上ある場合は、全てのその他障害を併合した障害）とを併合した障害の程度が当該障害厚生年金の支給事由となつた障害の程度より増進したときは、その者は、実施機関に対し、その期間内に障害厚生年金の額の改定を請求することができる。 art-52/par-4 · https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-4 · https://japanlaw.org/l/329AC0000000115/art-52/par-4 If a beneficiary of an employees' disability pension who has contracted an illness or suffered an injury and who was an insured on the day of initial examination for that injury or illness (limited to an injury or illness for which the day of initial examination comes after the day of initial examination for the injury or illness that constitutes the grounds for payment of the relevant employees' disability pension; the same applies hereinafter in this paragraph and the proviso to Article 54, paragraph (2)), has a disability (limited to a disability of a degree of severity that is not classified as Grade 1 or Grade 2 of the disability grades; hereinafter referred to as "another disability" in this paragraph and the proviso of paragraph (2) of that Article) due to that injury or illness, and if the severity of the beneficiary's disabilities stemming from a combination of the disability constituting the grounds for payment of the relevant employees' disability pension and the other disability (or all other disabilities, if there are two or more other disabilities) has become worse than that of the disability constituting the grounds for payment of that pension during the period from the day of disability assessment for that injury or illness until the day on which the beneficiary reaches 65 years of age, the beneficiary may request the implementing organization to revise the amount of employees' disability pension within that period. Ministry of Justice translation with a slip corrected by this site — not the Ministry's text; the Ministry printed: "If a beneficiary of an employees' disability pension who has contracted an illness or suffered an injury and who was an insured on the day of initial examination for that injury or illness (limited to an injury or illness for which the day of initial examination comes after the day of initial examination for the injury or illness that constitutes the grounds for payment of the relevant employees' disability pension; the same applies hereinafter in this paragraph and the proviso to Article 54, paragraph (2)), has a disability (limited to a disability of a the degree of severity that is not classified as Grade 1 or Grade 2 of the disability grades; hereinafter referred to as "another disability" in this paragraph and the proviso of paragraph (2) of that Article) due to that injury or illness, and if the severity of the beneficiary's disabilities stemming from a combination of the disability constituting the grounds for payment of the relevant employees' disability pension and the other disability (or all other disabilities, if there are two or more other disabilities) has become worse than that of the disability constituting the grounds for payment of that pension during the period from the day of disability assessment for that injury or illness until the day on which the beneficiary reaches 65 years of age, the beneficiary may request the implementing organization to revise the amount of employees' disability pension within that period." — https://www.japaneselawtranslation.go.jp/en/laws/view/3554/tb **第五項** 第四十七条第一項ただし書の規定は、前項の場合に準用する。 art-52/par-5 · https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-5 · https://japanlaw.org/l/329AC0000000115/art-52/par-5 The provisions under the proviso to Article 47 paragraph (1) apply mutatis mutandis to a case under the preceding paragraph. Ministry of Justice translation — Japanese Law Translation Database System **第六項** 第一項の規定により障害厚生年金の額が改定されたときは、改定後の額による障害厚生年金の支給は、改定が行われた月の翌月から始めるものとする。 art-52/par-6 · https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-6 · https://japanlaw.org/l/329AC0000000115/art-52/par-6 If the amount of an employees' disability pension has been revised pursuant to the provisions of paragraph (1), the payment of the revised amount of employees' disability pension is to commence from the month following the month of the revision. Ministry of Justice translation — Japanese Law Translation Database System **第七項** 第一項から第三項まで及び前項の規定は、六十五歳以上の者であつて、かつ、障害厚生年金の受給権者（当該障害厚生年金と同一の支給事由に基づく国民年金法による障害基礎年金の受給権を有しないものに限る。）については、適用しない。 art-52/par-7 · https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-7 · https://japanlaw.org/l/329AC0000000115/art-52/par-7 The provisions of paragraphs (1) through (3) and the preceding paragraph do not apply to a person who is 65 years of age or older and also the beneficiary of an employees' disability pension (limited to a person who has no right to receive benefits from a basic disability pension under the National Pension Act based on the same grounds for payment of the relevant employees' disability pension). Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-52/par-3: 前項 → 厚生年金保険法 第五十二条第二項 (Article 52, paragraph (2)), art-52/par-2 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-2 · https://japanlaw.org/l/329AC0000000115/art-52/par-2 - art-52/par-3: 第一項 → 厚生年金保険法 第五十二条第一項 (Article 52, paragraph (1)), art-52/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-1 · https://japanlaw.org/l/329AC0000000115/art-52/par-1 - art-52/par-4: この項 → 厚生年金保険法 第五十二条第四項 (Article 52, paragraph (4)), art-52/par-4 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-4 · https://japanlaw.org/l/329AC0000000115/art-52/par-4 - art-52/par-4: 第五十四条第二項 → 厚生年金保険法 第五十四条第二項 (Article 54, paragraph (2)), art-54/par-2 — https://japanlaw.org/en/employees-pension-insurance-act/art-54/par-2 · https://japanlaw.org/l/329AC0000000115/art-54/par-2 - art-52/par-5: 第四十七条第一項 → 厚生年金保険法 第四十七条第一項 (Article 47, paragraph (1)), art-47/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/art-47/par-1 · https://japanlaw.org/l/329AC0000000115/art-47/par-1 - art-52/par-5: 前項 → 厚生年金保険法 第五十二条第四項 (Article 52, paragraph (4)), art-52/par-4 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-4 · https://japanlaw.org/l/329AC0000000115/art-52/par-4 - art-52/par-6: 第一項 → 厚生年金保険法 第五十二条第一項 (Article 52, paragraph (1)), art-52/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-1 · https://japanlaw.org/l/329AC0000000115/art-52/par-1 - art-52/par-7: 第一項から第三項まで → 厚生年金保険法 第五十二条第一項 (Article 52, paragraph (1)), art-52/par-1 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-1 · https://japanlaw.org/l/329AC0000000115/art-52/par-1 - art-52/par-7: 第一項から第三項まで → 厚生年金保険法 第五十二条第二項 (Article 52, paragraph (2)), art-52/par-2 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-2 · https://japanlaw.org/l/329AC0000000115/art-52/par-2 - art-52/par-7: 第一項から第三項まで → 厚生年金保険法 第五十二条第三項 (Article 52, paragraph (3)), art-52/par-3 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-3 · https://japanlaw.org/l/329AC0000000115/art-52/par-3 - art-52/par-7: 前項 → 厚生年金保険法 第五十二条第六項 (Article 52, paragraph (6)), art-52/par-6 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-6 · https://japanlaw.org/l/329AC0000000115/art-52/par-6 ## Cited by 21 provisions cite this one. No official source publishes this direction. - 厚生年金保険法 第四十八条第一項（障害厚生年金の併給の調整） — https://japanlaw.org/en/employees-pension-insurance-act/art-48/par-1 · https://japanlaw.org/l/329AC0000000115/art-48/par-1 - 厚生年金保険法 第五十二条第三項 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-3 · https://japanlaw.org/l/329AC0000000115/art-52/par-3 - 厚生年金保険法 第五十二条第四項 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-4 · https://japanlaw.org/l/329AC0000000115/art-52/par-4 - 厚生年金保険法 第五十二条第五項 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-5 · https://japanlaw.org/l/329AC0000000115/art-52/par-5 - 厚生年金保険法 第五十二条第六項 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-6 · https://japanlaw.org/l/329AC0000000115/art-52/par-6 - 厚生年金保険法 第五十二条第七項 — https://japanlaw.org/en/employees-pension-insurance-act/art-52/par-7 · https://japanlaw.org/l/329AC0000000115/art-52/par-7 - 厚生年金保険法 第七十四条第一項 — https://japanlaw.org/en/employees-pension-insurance-act/art-74/par-1 · https://japanlaw.org/l/329AC0000000115/art-74/par-1 - 厚生年金保険法 第百条の四第一項第十六号（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-16 · https://japanlaw.org/l/329AC0000000115/art-100-4/par-1/item-16 - 厚生年金保険法 第百条の十第一項第十四号（機構への事務の委託） — https://japanlaw.org/en/employees-pension-insurance-act/art-100-10/par-1/item-14 · https://japanlaw.org/l/329AC0000000115/art-100-10/par-1/item-14 - 厚生年金保険法 附則第七条の二第一項（他の被保険者の種別に係る被保険者であつた期間の確認等） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3291-115/art-7-2/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-7-2/par-1 - 厚生年金保険法 附則第七条の二第二項（他の被保険者の種別に係る被保険者であつた期間の確認等） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3291-115/art-7-2/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-7-2/par-2 - 厚生年金保険法 附則第十六条の三第一項（障害厚生年金の特例） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3291-115/art-16-3/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-16-3/par-1 - 厚生年金保険法 附則第十六条の三第二項（障害厚生年金の特例） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3291-115/art-16-3/par-2 · https://japanlaw.org/l/329AC0000000115/suppl-3291-115/art-16-3/par-2 - 厚生年金保険法 附則第四十八条第六項 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-48/par-6 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-48/par-6 - 厚生年金保険法 附則第六十四条第一項（障害厚生年金等の支給要件の特例） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-64/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-64/par-1 - 厚生年金保険法 附則第六十五条第一項 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-65/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-65/par-1 - 厚生年金保険法 附則第七十八条第七項（旧厚生年金保険法による給付） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-78/par-7 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-78/par-7 - 厚生年金保険法 附則第八十七条第八項 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-3601-34/art-87/par-8 · https://japanlaw.org/l/329AC0000000115/suppl-3601-34/art-87/par-8 - 厚生年金保険法 附則第二十六条第一項（障害年金の額の改定請求に関する経過措置） — https://japanlaw.org/en/employees-pension-insurance-act/suppl-4241-62/art-26/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4241-62/art-26/par-1 - 厚生年金保険法 附則第二十七条第一項 — https://japanlaw.org/en/employees-pension-insurance-act/suppl-4241-62/art-27/par-1 · https://japanlaw.org/l/329AC0000000115/suppl-4241-62/art-27/par-1 - 国民年金法 第三十条の二第四項 — https://japanlaw.org/en/national-pension-act/art-30-2/par-4 · https://japanlaw.org/l/334AC0000000141/art-30-2/par-4 --- ## Sources - claude-opus-5-5 — Corrections to the Ministry of Justice's English of the Employees' Pension Insurance Act, written 2026-10-13 - 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 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Employees' Pension Insurance Act (厚生年金保険法), Article 52, paragraph (4) — the Ministry of Justice's English as printed (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