# 国民健康保険法 / National Health Insurance Act — 第二十一条 (Article 21) - Law: 国民健康保険法 (National Health Insurance Act), 昭和三十三年法律第百九十二号 - English title "National Health 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)（資格喪失の時期） — address `art-21` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/en/national-health-insurance-act/art-21 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/333AC0000000192/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（資格喪失の時期） — (Time of Loss of Eligibility) caption: Ministry of Justice translation — Japanese Law Translation Database System art-21 · https://japanlaw.org/en/national-health-insurance-act/art-21 · https://japanlaw.org/l/333AC0000000192/art-21 **第一項** 組合が行う国民健康保険の被保険者は、組合員若しくは組合員の世帯に属する者でなくなつた日の翌日又は第六条各号（第九号及び第十号を除く。）のいずれかに該当するに至つた日の翌日から、その資格を喪失する。ただし、組合員又は組合員の世帯に属する者でなくなつたことにより、都道府県等が行う国民健康保険又は他の組合が行う国民健康保険の被保険者となつたときは、その日から、その資格を喪失する。 art-21/par-1 · https://japanlaw.org/en/national-health-insurance-act/art-21/par-1 · https://japanlaw.org/l/333AC0000000192/art-21/par-1 An insured person under the national health insurance program provided by a Society shall lose eligibility as such from the day immediately following the day on which said person ceases to be a member of said Society or ceases to belong to such member's household or from the day immediately following the first day on which said person falls under any of the items (excluding items (ix) and (x)) of Article 6; provided, however, that if said insured person becomes an insured person under the national health insurance program provided by prefectures, etc. or the national health insurance program provided by another Society as a result of the fact that said person ceases to be a member of said Society or ceases to belong to such member's household, said person shall lose eligibility as such from the day on which said person ceases to be a member of such Society or ceases to belong to such member's household. machine translation, not official **第二項** 組合が行う国民健康保険の被保険者は、第六条第九号に該当するに至つた日から、その資格を喪失する。 art-21/par-2 · https://japanlaw.org/en/national-health-insurance-act/art-21/par-2 · https://japanlaw.org/l/333AC0000000192/art-21/par-2 An insured person under the national health insurance program provided by a Society shall lose eligibility as such from the first day on which said person falls under item (ix) of Article 6. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-21/par-1: 第六条 → 国民健康保険法 第六条 (Article 6), art-6 — https://japanlaw.org/en/national-health-insurance-act/art-6 · https://japanlaw.org/l/333AC0000000192/art-6 - art-21/par-1: 第九号 → 国民健康保険法 第六条第一項第九号 (Article 6, paragraph (1), item (ix)), art-6/par-1/item-9 — https://japanlaw.org/en/national-health-insurance-act/art-6/par-1/item-9 · https://japanlaw.org/l/333AC0000000192/art-6/par-1/item-9 - art-21/par-1: 第十号 → 国民健康保険法 第六条第一項第十号 (Article 6, paragraph (1), item (x)), art-6/par-1/item-10 — https://japanlaw.org/en/national-health-insurance-act/art-6/par-1/item-10 · https://japanlaw.org/l/333AC0000000192/art-6/par-1/item-10 - art-21/par-2: 第六条第九号 → 国民健康保険法 第六条第一項第九号 (Article 6, paragraph (1), item (ix)), art-6/par-1/item-9 — https://japanlaw.org/en/national-health-insurance-act/art-6/par-1/item-9 · https://japanlaw.org/l/333AC0000000192/art-6/par-1/item-9 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 国民健康保険法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/333AC0000000192/20261001_507AC0000000087), retrieved 2026-10-17 - Japanese Law Translation Database System, Ministry of Justice (法務省) — National Health Insurance Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/2453/tb), retrieved 2026-10-17 - claude-sonnet-5-5 — Machine translation, batch national-health-insurance-act-20261017T183826-002, translated 2026-10-18 - This site's parser, version 209 — 国民健康保険法 — structure, counts, cross-references and defined terms, computed 2026-10-17