# 国民健康保険法 / National Health Insurance Act — 第八条 (Supplementary Provisions, Article 8)
- 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: 第八条 (Supplementary Provisions, Article 8)（合併市町村における保険料の賦課に関する特例） — address `suppl-3331-192/art-8`
- Text in force since: 2026-10-01
- URL (the page that opens at this provision): https://japanlaw.org/ja/national-health-insurance-act/suppl-3331-192/art-8
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/333AC0000000192/suppl-3331-192/art-8
- 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.
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### 第八条（合併市町村における保険料の賦課に関する特例） — Special Provisions on Assessment of Insurance Premiums in Merged Municipalities
caption: machine translation, not official
suppl-3331-192/art-8 · https://japanlaw.org/ja/national-health-insurance-act/suppl-3331-192/art-8 · https://japanlaw.org/l/333AC0000000192/suppl-3331-192/art-8
**第一項** 市町村の合併の特例に関する法律（平成十六年法律第五十九号）第二条第二項に規定する合併市町村は、同条第三項に規定する合併関係市町村の相互の間に保険料の賦課に関し著しい不均衡があるため、その全区域にわたつて均一の保険料の賦課をすることが著しく衡平を欠くと認められる場合においては、市町村の合併（令和十二年三月三十一日までの間に行われたものに限る。）が行われた日の属する年度及びこれに続く五箇年度に限り、その衡平を欠く程度を限度として不均一の保険料の賦課をすることができる。
suppl-3331-192/art-8/par-1 · https://japanlaw.org/ja/national-health-insurance-act/suppl-3331-192/art-8/par-1 · https://japanlaw.org/l/333AC0000000192/suppl-3331-192/art-8/par-1
A merged Municipality prescribed in Article 2, paragraph (2) of the Act on Special Provisions for the Merger of Municipalities (Act No. 59 of 2004) may, in the case where, owing to a significant imbalance in the assessment of insurance premiums among the Municipalities concerned in the merger prescribed in paragraph (3) of that Article, it is found that assessing uniform insurance premiums over the whole of its area would be significantly inequitable, assess non-uniform insurance premiums to the extent of that inequity, limited to the fiscal year including the day on which the merger of Municipalities (limited to a merger carried out on or before March 31, 2030) took place and the following five fiscal years.
machine translation, not official
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## Cites
- suppl-3331-192/art-8/par-1: 市町村の合併の特例に関する法律（平成十六年法律第五十九号）第二条第二項 → e-Gov law 416AC0000000059, 第二条第二項 (Article 2, paragraph (2)), art-2/par-2 — not held in this collection
- suppl-3331-192/art-8/par-1: 同条第三項 → e-Gov law 416AC0000000059, 第二条第三項 (Article 2, paragraph (3)), art-2/par-3 — not held in this collection
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## 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-20261017T183826-011, 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