# 健康保険法 / Health Insurance Act — 第三十一条 (Supplementary Provisions, Article 31) - 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: 第三十一条 (Supplementary Provisions, Article 31) — address `suppl-4181-83/art-31` - 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-31 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/211AC0000000070/suppl-4181-83/art-31 - 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. --- ### 第三十一条 suppl-4181-83/art-31 · https://japanlaw.org/en/health-insurance-act/suppl-4181-83/art-31 · https://japanlaw.org/l/211AC0000000070/suppl-4181-83/art-31 **第一項** 平成二十年十月改正健保法第百六十条第三項の規定に基づき算定した都道府県単位保険料率のうち、第四条の規定の施行の日の前日における旧政管健保の一般保険料率との率の差が政令で定める基準を上回るものがある場合においては、同項の規定にかかわらず、協会は、成立の日から、被保険者及びその被扶養者の健康の保持増進並びに医療に要する費用の適正化に係る協会の各支部（健康保険法第百六十条第一項に規定する各支部をいう。）の取組の状況を勘案して令和六年三月三十一日までの間において政令で定める日までの間に限り、政令で定めるところにより、都道府県単位保険料率の調整を行い、運営委員会の議を経て、当該算定した都道府県単位保険料率とは異なる都道府県単位保険料率を定めるものとする。 suppl-4181-83/art-31/par-1 · https://japanlaw.org/en/health-insurance-act/suppl-4181-83/art-31/par-1 · https://japanlaw.org/l/211AC0000000070/suppl-4181-83/art-31/par-1 Where, among the insurance premium rates for each prefecture calculated pursuant to Article 160, paragraph (3) of the Health Insurance Act as Amended in October 2008, there are any for which the difference from the general insurance premium rate of former government-managed health insurance on the day before the date of enforcement of the provisions of Article 4 exceeds the standard specified by Cabinet Order, notwithstanding that paragraph, JHIA is to, from the day of its establishment and only until the date specified by Cabinet Order within a period ending March 31, 2024, taking into account the status of the efforts of each of its branches (meaning the branches prescribed in Article 160, paragraph (1) of the Health Insurance Act) concerning the maintenance and promotion of the health of insured persons and their dependents and the optimization of expenses required for medical care, adjust the insurance premium rates for each prefecture as provided by Cabinet Order and, following discussion at the management board, determine insurance premium rates for each prefecture that differ from the insurance premium rates for each prefecture so calculated. machine translation, not official --- ## Cites - suppl-4181-83/art-31/par-1: 平成二十年十月改正健保法第百六十条第三項 → 健康保険法 第百六十条第三項 (Article 160, paragraph (3)), art-160/par-3 — https://japanlaw.org/en/health-insurance-act/art-160/par-3 · https://japanlaw.org/l/211AC0000000070/art-160/par-3 - suppl-4181-83/art-31/par-1: 健康保険法第百六十条第一項 → 健康保険法 第百六十条第一項 (Article 160, paragraph (1)), art-160/par-1 — https://japanlaw.org/en/health-insurance-act/art-160/par-1 · https://japanlaw.org/l/211AC0000000070/art-160/par-1 ## 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