# 国民健康保険法 / National Health Insurance Act — 第四十三条 (Article 43) - 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: 第四十三条 (Article 43) — address `art-43` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/en/national-health-insurance-act/art-43 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/333AC0000000192/art-43 - 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. --- ### 第四十三条 art-43 · https://japanlaw.org/en/national-health-insurance-act/art-43 · https://japanlaw.org/l/333AC0000000192/art-43 **第一項** 市町村及び組合は、政令で定めるところにより、条例又は規約で、第四十二条第一項に規定する一部負担金の割合を減ずることができる。 art-43/par-1 · https://japanlaw.org/en/national-health-insurance-act/art-43/par-1 · https://japanlaw.org/l/333AC0000000192/art-43/par-1 Municipalities and Societies may, pursuant to Cabinet Order provisions, reduce the ratio of co-payment set forth in Article 42, paragraph (1) by Municipal Ordinance or by constitution. machine translation, not official **第二項** 前項の規定により一部負担金の割合が減ぜられたときは、市町村又は組合が開設者の同意を得て定める保険医療機関等について療養の給付を受ける被保険者は、第四十二条第一項の規定にかかわらず、その減ぜられた割合による一部負担金を当該保険医療機関等に支払うをもつて足りる。 art-43/par-2 · https://japanlaw.org/en/national-health-insurance-act/art-43/par-2 · https://japanlaw.org/l/333AC0000000192/art-43/par-2 When the ratio of co-payment is reduced pursuant to the provisions of the preceding paragraph, it shall be sufficient for an insured person who receives benefits for medical treatment in relation to one of the health insurance-covered medical institutions, etc. designated by a Municipality or Society with the consent of their respective establishers, to pay co-payment calculated in accordance with the ratio after such reduction to such health insurance-covered medical institution, etc., notwithstanding the provisions of Article 42, paragraph (1). machine translation, not official **第三項** 第一項の規定により一部負担金の割合が減ぜられた場合において、被保険者が前項に規定する保険医療機関等以外の保険医療機関等について療養の給付を受けたときは、市町村及び組合は、当該被保険者が第四十二条第一項の規定により当該保険医療機関等に支払つた一部負担金と第一項の規定により減ぜられた割合による一部負担金との差額を当該被保険者に支給しなければならない。 art-43/par-3 · https://japanlaw.org/en/national-health-insurance-act/art-43/par-3 · https://japanlaw.org/l/333AC0000000192/art-43/par-3 In cases where the ratio of co-payment has been reduced pursuant to the provisions of paragraph (1) and when an insured person has received benefits for medical treatment at or from a health insurance-covered medical institution, etc. which is not one of those set forth in the preceding paragraph, Municipalities and Societies must pay to such insured person the difference between the amount of co-payment paid by such insured person to the health insurance-covered medical institution, etc. pursuant to the provisions of Article 42, paragraph (1) and the amount of co-payment calculated pursuant to the ratio after the reduction made pursuant to the provisions of paragraph (1). machine translation, not official **第四項** 前条の規定は、第二項の場合における一部負担金の支払について準用する。 art-43/par-4 · https://japanlaw.org/en/national-health-insurance-act/art-43/par-4 · https://japanlaw.org/l/333AC0000000192/art-43/par-4 The provisions of the preceding Article shall apply mutatis mutandis to the making of co-payment in the case set forth in paragraph (2). Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-43/par-1: 第四十二条第一項 → 国民健康保険法 第四十二条第一項 (Article 42, paragraph (1)), art-42/par-1 — https://japanlaw.org/en/national-health-insurance-act/art-42/par-1 · https://japanlaw.org/l/333AC0000000192/art-42/par-1 - art-43/par-2: 前項 → 国民健康保険法 第四十三条第一項 (Article 43, paragraph (1)), art-43/par-1 — https://japanlaw.org/en/national-health-insurance-act/art-43/par-1 · https://japanlaw.org/l/333AC0000000192/art-43/par-1 - art-43/par-2: 第四十二条第一項 → 国民健康保険法 第四十二条第一項 (Article 42, paragraph (1)), art-42/par-1 — https://japanlaw.org/en/national-health-insurance-act/art-42/par-1 · https://japanlaw.org/l/333AC0000000192/art-42/par-1 - art-43/par-3: 第一項 → 国民健康保険法 第四十三条第一項 (Article 43, paragraph (1)), art-43/par-1 — https://japanlaw.org/en/national-health-insurance-act/art-43/par-1 · https://japanlaw.org/l/333AC0000000192/art-43/par-1 - art-43/par-3: 前項 → 国民健康保険法 第四十三条第二項 (Article 43, paragraph (2)), art-43/par-2 — https://japanlaw.org/en/national-health-insurance-act/art-43/par-2 · https://japanlaw.org/l/333AC0000000192/art-43/par-2 - art-43/par-3: 第四十二条第一項 → 国民健康保険法 第四十二条第一項 (Article 42, paragraph (1)), art-42/par-1 — https://japanlaw.org/en/national-health-insurance-act/art-42/par-1 · https://japanlaw.org/l/333AC0000000192/art-42/par-1 - art-43/par-4: 前条 → 国民健康保険法 第四十二条の二 (Article 42-2), art-42-2 — https://japanlaw.org/en/national-health-insurance-act/art-42-2 · https://japanlaw.org/l/333AC0000000192/art-42-2 - art-43/par-4: 第二項 → 国民健康保険法 第四十三条第二項 (Article 43, paragraph (2)), art-43/par-2 — https://japanlaw.org/en/national-health-insurance-act/art-43/par-2 · https://japanlaw.org/l/333AC0000000192/art-43/par-2 ## Cited by 17 provisions cite this one. No official source publishes this direction. - 国民健康保険法 第四十二条第二項（療養の給付を受ける場合の一部負担金） — https://japanlaw.org/en/national-health-insurance-act/art-42/par-2 · https://japanlaw.org/l/333AC0000000192/art-42/par-2 - 国民健康保険法 第四十三条第二項 — https://japanlaw.org/en/national-health-insurance-act/art-43/par-2 · https://japanlaw.org/l/333AC0000000192/art-43/par-2 - 国民健康保険法 第四十三条第三項 — https://japanlaw.org/en/national-health-insurance-act/art-43/par-3 · https://japanlaw.org/l/333AC0000000192/art-43/par-3 - 国民健康保険法 第四十三条第四項 — https://japanlaw.org/en/national-health-insurance-act/art-43/par-4 · https://japanlaw.org/l/333AC0000000192/art-43/par-4 - 国民健康保険法 第四十四条第一項 — https://japanlaw.org/en/national-health-insurance-act/art-44/par-1 · https://japanlaw.org/l/333AC0000000192/art-44/par-1 - 国民健康保険法 第四十四条第二項 — https://japanlaw.org/en/national-health-insurance-act/art-44/par-2 · https://japanlaw.org/l/333AC0000000192/art-44/par-2 - 国民健康保険法 第五十三条第二項第一号（保険外併用療養費） — https://japanlaw.org/en/national-health-insurance-act/art-53/par-2/item-1 · https://japanlaw.org/l/333AC0000000192/art-53/par-2/item-1 - 国民健康保険法 第五十四条の二第四項（訪問看護療養費） — https://japanlaw.org/en/national-health-insurance-act/art-54-2/par-4 · https://japanlaw.org/l/333AC0000000192/art-54-2/par-4 - 国民健康保険法 第五十六条第二項（他の法令による医療に関する給付との調整） — https://japanlaw.org/en/national-health-insurance-act/art-56/par-2 · https://japanlaw.org/l/333AC0000000192/art-56/par-2 - 国民健康保険法 第五十六条第三項（他の法令による医療に関する給付との調整） — https://japanlaw.org/en/national-health-insurance-act/art-56/par-3 · https://japanlaw.org/l/333AC0000000192/art-56/par-3 - 国民健康保険法 第五十七条第一項（世帯主又は組合員でない被保険者に係る一部負担金等） — https://japanlaw.org/en/national-health-insurance-act/art-57/par-1 · https://japanlaw.org/l/333AC0000000192/art-57/par-1 - 国民健康保険法 第六十三条の二第一項 — https://japanlaw.org/en/national-health-insurance-act/art-63-2/par-1 · https://japanlaw.org/l/333AC0000000192/art-63-2/par-1 - 国民健康保険法 第六十六条の二第一項（市町村による保険給付に係る事務の範囲） — https://japanlaw.org/en/national-health-insurance-act/art-66-2/par-1 · https://japanlaw.org/l/333AC0000000192/art-66-2/par-1 - 国民健康保険法 第六十六条の二第二項（市町村による保険給付に係る事務の範囲） — https://japanlaw.org/en/national-health-insurance-act/art-66-2/par-2 · https://japanlaw.org/l/333AC0000000192/art-66-2/par-2 - 国民健康保険法 第七十条第二項 — https://japanlaw.org/en/national-health-insurance-act/art-70/par-2 · https://japanlaw.org/l/333AC0000000192/art-70/par-2 - 国民健康保険法 第七十三条第三項（組合に対する補助） — https://japanlaw.org/en/national-health-insurance-act/art-73/par-3 · https://japanlaw.org/l/333AC0000000192/art-73/par-3 - 国民健康保険法 附則第三条第二項 — https://japanlaw.org/en/national-health-insurance-act/suppl-4241-28/art-3/par-2 · https://japanlaw.org/l/333AC0000000192/suppl-4241-28/art-3/par-2 --- ## 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