# 健康保険法施行令 / Order for Enforcement of the Health Insurance Act — 第四十五条の二 (Article 45-2)

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- Law: 健康保険法施行令 (Order for Enforcement of the Health Insurance Act), 大正十五年勅令第二百四十三号
- English title "Order for Enforcement of the Health Insurance Act": claude-opus-5-5
- Kind: ImperialOrder — 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: 第四十五条の二 (Article 45-2)（都道府県単位保険料率の算定方法） — address `art-45-2`
- Text in force since: 2026-10-01
- URL (the page that opens at this provision): https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2
- e-Gov law ID: 215IO0000000243 — never renamed. A permanent link, `/l/{lawId}/{address}` on this site, redirects to the page.
- Every provision below carries its address and its URL 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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### 第四十五条の二（都道府県単位保険料率の算定方法） — Method of Calculating the Premium Rate for Each Prefecture
<sup>caption: machine translation, not official</sup>
<sup>art-45-2 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2</sup>

**第一項**  協会は、厚生労働省令で定めるところにより、一の事業年度の翌事業年度における、第一号に掲げる額を予定保険料納付率（一の事業年度の三月分から当該一の事業年度の翌事業年度の二月分までの保険料（任意継続被保険者に係る保険料にあっては、当該翌事業年度の四月分から三月分までの保険料）として徴収すべき額の見込額に占める当該翌事業年度において納付が見込まれる保険料の額の総額の割合として厚生労働省令で定めるところにより算定される率をいう。次条において同じ。）で除して得た額を第二号に掲げる額で除することにより、当該一の事業年度の三月から用いる都道府県単位保険料率（法第百六十条第二項に規定する都道府県単位保険料率をいう。次条及び第四十五条の四第四項第一号において同じ。）を算定するものとする。
<sup>art-45-2/par-1 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1</sup>
As specified by Order of the Ministry of Health, Labour and Welfare, JHIA is to calculate the premium rate for each prefecture (meaning the premium rate for each prefecture prescribed in Article 160, paragraph (2) of the Act; the same applies in the following Article and Article 45-4, paragraph (4), item (i)) to be used from March of a business year, by dividing the amount obtained by dividing the amount listed in item (i) by the projected premium payment rate (meaning the rate calculated, as specified by Order of the Ministry of Health, Labour and Welfare, as the proportion that the total amount of premiums expected to be paid in the business year following the business year represents of the estimated amount to be collected as premiums for the period from March of a business year to February of the business year following that business year (for premiums relating to insured persons with optional and continued coverage, premiums for the period from April to March of that following business year); the same applies in the following Article) by the amount listed in item (ii), for the business year following the business year.
<sup>machine translation, not official</sup>

  **一**  次のイからハまでに掲げる額を合算した額からニに掲げる額を控除した額
  <sup>art-45-2/par-1/item-1 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1</sup>
  the amount obtained by deducting the amount listed in (d) from the total sum of the amounts listed in (a) through (c);
  <sup>machine translation, not official</sup>

    **イ**  法第百六十条第三項第一号に掲げる額から当該支部被保険者（同条第一項に規定する支部被保険者をいう。以下同じ。）に係る同号に規定する療養の給付等（第四十五条の四第四項第一号及び第二号において「療養の給付等」という。）に要する費用のうち法の規定により支払うべき一部負担金に相当する額の見込額を控除した額
    <sup>art-45-2/par-1/item-1/sub-1 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1/sub-1</sup>
    the amount obtained by deducting, from the amount listed in Article 160, paragraph (3), item (i) of the Act, the estimated amount of the amount equivalent to the partial co-payment payable pursuant to the provisions of the Act out of the expenses required for the benefits for medical treatment, etc. prescribed in that item (referred to as "benefits for medical treatment, etc." in Article 45-4, paragraph (4), items (i) and (ii)) relating to the branch-insured person concerned (meaning the single branch-insured person prescribed in Article 160, paragraph (1) of the Act; the same applies hereinafter);
    <sup>machine translation, not official</sup>

    **ロ**  法第百六十条第三項第二号に掲げる額から当該支部被保険者に係る同号に規定する保険給付に要する費用のうち法の規定により支払うべき一部負担金に相当する額の見込額を控除した額と一の事業年度の前々事業年度の三月から当該一の事業年度の前事業年度の二月までの各月の当該支部被保険者（任意継続被保険者を除く。）の総報酬額（標準報酬月額及び標準賞与額の合計額をいう。以下この条及び次条において同じ。）の総額及び当該一の事業年度の前事業年度の四月から三月までの各月の当該支部被保険者（任意継続被保険者に限る。）の総報酬額の総額の合算額に千分の〇・一を乗じて得た額とを合算して得た額
    <sup>art-45-2/par-1/item-1/sub-2 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1/sub-2</sup>
    the amount obtained by adding together the amount obtained by deducting, from the amount listed in Article 160, paragraph (3), item (ii) of the Act, the estimated amount of the amount equivalent to the partial co-payment payable pursuant to the provisions of the Act out of the expenses required for the insurance benefits prescribed in that item relating to the branch-insured person concerned, and the amount obtained by multiplying by 0.1/1,000 the total sum of the total amount of the total remuneration (meaning the total of the standard monthly remuneration and the standard bonus amount; the same applies in this Article and the following Article) of the branch-insured person concerned (excluding insured persons with optional and continued coverage) for each month from March of the business year before the previous business year of a business year through February of the business year previous to that business year, and the total amount of the total remuneration of the branch-insured person concerned (limited to insured persons with optional and continued coverage) for each month from April through March of the business year previous to that business year;
    <sup>machine translation, not official</sup>

    **ハ**  法第百六十条第三項第三号に掲げる額
    <sup>art-45-2/par-1/item-1/sub-3 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1/sub-3</sup>
    the amount listed in Article 160, paragraph (3), item (iii) of the Act; and
    <sup>machine translation, not official</sup>

    **ニ**  一の事業年度において取り崩すことが見込まれる準備金の額その他健康保険事業に要する費用のための収入の見込額のうち当該支部被保険者を単位とする健康保険の当該一の事業年度の財政においてその収入とみなすべき額として協会が定める額並びに高齢者の医療の確保に関する法律第十八条第一項に規定する特定健康診査及び同項に規定する特定保健指導の実施状況その他の当該支部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当該支部（法第七条の四第一項に規定する支部をいう。）の取組の状況を勘案して厚生労働省令で定めるところにより算定した報奨金の額
    <sup>art-45-2/par-1/item-1/sub-4 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1/sub-4</sup>
    the amount specified by JHIA as the amount to be deemed revenue in the finances of a business year of health insurance on the basis of the branch-insured person concerned, out of the estimated amount of revenue for expenses required for health insurance business, such as the amount of reserves expected to be drawn down in that business year, and the amount of incentive payment calculated, as specified by Order of the Ministry of Health, Labour and Welfare, taking into account the status of implementation of the special health examination prescribed in Article 18, paragraph (1) of the Act on Assurance of Medical Care for Elderly People and the specified health guidance prescribed in the same paragraph, and other efforts of the relevant branch (meaning the branch prescribed in Article 7-4, paragraph (1) of the Act) concerning the maintenance and promotion of the health of the branch-insured person concerned and the dependents of that person and the optimization of medical expenses;
    <sup>machine translation, not official</sup>

  **二**  一の事業年度の三月から当該一の事業年度の翌事業年度の二月までの各月の当該支部被保険者（任意継続被保険者を除く。）の総報酬額の総額及び当該一の事業年度の翌事業年度の四月から三月までの各月の当該支部被保険者（任意継続被保険者に限る。）の総報酬額の総額の合算額の見込額
  <sup>art-45-2/par-1/item-2 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-2</sup>
  the estimated amount of the total sum of the total amount of the total remuneration of the branch-insured person concerned (excluding insured persons with optional and continued coverage) for each month from March of a business year through February of the business year following that business year, and the total amount of the total remuneration of the branch-insured person concerned (limited to insured persons with optional and continued coverage) for each month from April through March of the business year following that business year.
  <sup>machine translation, not official</sup>

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## Cites
- art-45-2/par-1: 第一号 → 健康保険法施行令 第四十五条の二第一項第一号 (Article 45-2, paragraph (1), item (i)), art-45-2/par-1/item-1 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1
- art-45-2/par-1: 次条 → 健康保険法施行令 第四十五条の三 (Article 45-3), art-45-3 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3
- art-45-2/par-1: 第二号 → 健康保険法施行令 第四十五条の二第一項第二号 (Article 45-2, paragraph (1), item (ii)), art-45-2/par-1/item-2 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-2
- art-45-2/par-1: 法第百六十条第二項 → 健康保険法 第百六十条第二項 (Article 160, paragraph (2)), art-160/par-2 — https://japanlaw.org/ja/health-insurance-act/art-160/par-2 (e-Gov law ID 211AC0000000070)
- art-45-2/par-1: 第四十五条の四第四項第一号 → 健康保険法施行令 第四十五条の四第四項第一号 (Article 45-4, paragraph (4), item (i)), art-45-4/par-4/item-1 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-4/par-4/item-1
- art-45-2/par-1/item-1/sub-1: 法第百六十条第三項第一号 → 健康保険法 第百六十条第三項第一号 (Article 160, paragraph (3), item (i)), art-160/par-3/item-1 — https://japanlaw.org/ja/health-insurance-act/art-160/par-3/item-1 (e-Gov law ID 211AC0000000070)
- art-45-2/par-1/item-1/sub-1: 同条第一項 → 健康保険法 第百六十条第一項 (Article 160, paragraph (1)), art-160/par-1 — https://japanlaw.org/ja/health-insurance-act/art-160/par-1 (e-Gov law ID 211AC0000000070)
- art-45-2/par-1/item-1/sub-1: 第四十五条の四第四項第一号 → 健康保険法施行令 第四十五条の四第四項第一号 (Article 45-4, paragraph (4), item (i)), art-45-4/par-4/item-1 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-4/par-4/item-1
- art-45-2/par-1/item-1/sub-1: 第二号 → 健康保険法施行令 第四十五条の四第四項第二号 (Article 45-4, paragraph (4), item (ii)), art-45-4/par-4/item-2 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-4/par-4/item-2
- art-45-2/par-1/item-1/sub-2: 法第百六十条第三項第二号 → 健康保険法 第百六十条第三項第二号 (Article 160, paragraph (3), item (ii)), art-160/par-3/item-2 — https://japanlaw.org/ja/health-insurance-act/art-160/par-3/item-2 (e-Gov law ID 211AC0000000070)
- art-45-2/par-1/item-1/sub-2: この条 → 健康保険法施行令 第四十五条の二 (Article 45-2), art-45-2 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2
- art-45-2/par-1/item-1/sub-2: 次条 → 健康保険法施行令 第四十五条の三 (Article 45-3), art-45-3 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3
- art-45-2/par-1/item-1/sub-3: 法第百六十条第三項第三号 → 健康保険法 第百六十条第三項第三号 (Article 160, paragraph (3), item (iii)), art-160/par-3/item-3 — https://japanlaw.org/ja/health-insurance-act/art-160/par-3/item-3 (e-Gov law ID 211AC0000000070)
- art-45-2/par-1/item-1/sub-4: 高齢者の医療の確保に関する法律第十八条第一項 → 高齢者の医療の確保に関する法律 第十八条第一項 (Article 18, paragraph (1)), art-18/par-1 — https://japanlaw.org/ja/elderly-medical-care-act/art-18/par-1 (e-Gov law ID 357AC0000000080)
- art-45-2/par-1/item-1/sub-4: 法第七条の四第一項 → 健康保険法 第七条の四第一項 (Article 7-4, paragraph (1)), art-7-4/par-1 — https://japanlaw.org/ja/health-insurance-act/art-7-4/par-1 (e-Gov law ID 211AC0000000070)

## Cited by

13 provisions cite this one. No official source publishes this direction.

- 健康保険法施行令 第四十五条の二第一項（都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1
- 健康保険法施行令 第四十五条の二第一項第一号ロ（都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1/sub-2
- 健康保険法施行令 第四十五条の三第一項（三月以外の月から用いる都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1
- 健康保険法施行令 第四十五条の三第一項第一号（三月以外の月から用いる都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-1
- 健康保険法施行令 第四十五条の四第四項第一号（支部被保険者を単位とする健康保険の財政の調整） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-4/par-4/item-1
- 健康保険法施行令 附則第二条第一項第七号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-7
- 健康保険法施行令 附則第二条第一項第八号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-8
- 健康保険法施行令 附則第二条第一項第十号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-10
- 健康保険法施行令 附則第二条第一項第十一号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-11
- 健康保険法施行令 附則第二条第一項第十二号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-12
- 健康保険法施行令 附則第二条第一項第十三号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-13
- 健康保険法施行令 附則第二条第一項第十四号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-14
- 健康保険法施行令 附則第二条第一項第十五号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-15

---

## Sources

- claude-opus-5-5 — English title of a law in this collection, written for this site, written 2026-11-06
- e-Gov 法令検索, Digital Agency (デジタル庁) — 健康保険法施行令 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/215IO0000000243/20261001_508CO0000000276), retrieved 2026-11-06
- claude-sonnet-5-5 — Machine translation, batch health-insurance-act-enforcement-order-20261106T164949-016, translated 2026-11-07
- This site's parser, version 229 — 健康保険法施行令 — structure, counts, cross-references and defined terms, computed 2026-11-06