# 健康保険法 / Health Insurance Act — 第二十一条 (Supplementary Provisions, Article 21) - Law: 健康保険法 (Health Insurance Act), 大正十一年法律第七十号 - English title "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 (Supplementary Provisions, Article 21) — address `suppl-4181-83/art-21` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/en/health-insurance-act/suppl-4181-83/art-21 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/211AC0000000070/suppl-4181-83/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 suppl-4181-83/art-21 · https://japanlaw.org/en/health-insurance-act/suppl-4181-83/art-21 · https://japanlaw.org/l/211AC0000000070/suppl-4181-83/art-21 **第一項** 第四条の規定の施行の日の前日において平成二十年十月改正前健保法第五条第二項に規定する政府が管掌する健康保険（以下「旧政管健保」という。）の被保険者であった者（同日において、その者が平成二十年十月改正前健保法第三十六条各号又は第三十八条第一号から第三号までに掲げる事由に該当する場合を除く。）は、第四条の規定の施行の日において、平成二十年十月改正健保法第五条第二項に規定する全国健康保険協会が管掌する健康保険の被保険者になるものとする。 suppl-4181-83/art-21/par-1 · https://japanlaw.org/en/health-insurance-act/suppl-4181-83/art-21/par-1 · https://japanlaw.org/l/211AC0000000070/suppl-4181-83/art-21/par-1 A person who was an insured person of the health insurance administered by the government prescribed in Article 5, paragraph (2) of the Health Insurance Act Before the October 2008 Amendment (hereinafter referred to as "former government-managed health insurance") on the day before the date of enforcement of the provisions of Article 4 (excluding a person who, on that day, falls under any of the grounds listed in the items of Article 36 or Article 38, items (i) through (iii) of the Health Insurance Act Before the October 2008 Amendment) is to become, on the date of enforcement of the provisions of Article 4, an insured person of the health insurance administered by the Japan Health Insurance Association prescribed in Article 5, paragraph (2) of the Health Insurance Act as Amended in October 2008. machine translation, not official --- ## Cites - suppl-4181-83/art-21/par-1: 平成二十年十月改正健保法第五条第二項 → 健康保険法 第五条第二項 (Article 5, paragraph (2)), art-5/par-2 — https://japanlaw.org/en/health-insurance-act/art-5/par-2 · https://japanlaw.org/l/211AC0000000070/art-5/par-2 ## Cited by 2 provisions cite this one. No official source publishes this direction. - 健康保険法 附則第一条第一項第五号（施行期日） — https://japanlaw.org/en/health-insurance-act/suppl-4181-83/art-1/par-1/item-5 · https://japanlaw.org/l/211AC0000000070/suppl-4181-83/art-1/par-1/item-5 - 健康保険法 附則第百三十三条第一項（その他の経過措置の政令への委任） — https://japanlaw.org/en/health-insurance-act/suppl-4181-83/art-133/par-1 · https://japanlaw.org/l/211AC0000000070/suppl-4181-83/art-133/par-1 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 健康保険法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/211AC0000000070/20261001_507AC0000000087), retrieved 2026-10-10 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Health Insurance Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/3266/tb), retrieved 2026-10-10 - claude-sonnet-5-5 — Machine translation, batch health-insurance-act-20261010T183826-026, translated 2026-10-11 - This site's parser, version 189 — 健康保険法 — structure, counts, cross-references and defined terms, computed 2026-10-10