# 相続税法 / Inheritance Tax Act — 第一条 (Supplementary Provisions, Article 1)

- Law: 相続税法 (Inheritance Tax Act), 昭和二十五年法律第七十三号
- English title "Inheritance Tax Act": Ministry of Justice translation database, which lists the title
- 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: 第一条 (Supplementary Provisions, Article 1)（施行期日） — address `suppl-4151-8/art-1`
- Text in force since: 2026-04-01
- URL (the page that opens at this provision): https://japanlaw.org/ja/inheritance-tax-act/suppl-4151-8/art-1
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/325AC0000000073/suppl-4151-8/art-1
- 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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### 第一条（施行期日） — Effective Date
<sup>caption: machine translation, not official</sup>
<sup>suppl-4151-8/art-1 · https://japanlaw.org/ja/inheritance-tax-act/suppl-4151-8/art-1 · https://japanlaw.org/l/325AC0000000073/suppl-4151-8/art-1</sup>

**第一項**  この法律は、平成十五年四月一日から施行する。ただし、次の各号に掲げる規定は、当該各号に定める日から施行する。
<sup>suppl-4151-8/art-1/par-1 · https://japanlaw.org/ja/inheritance-tax-act/suppl-4151-8/art-1/par-1 · https://japanlaw.org/l/325AC0000000073/suppl-4151-8/art-1/par-1</sup>
This Act comes into effect on April 1, 2003; provided, however, that the provisions set forth in the following items come into effect on the dates specified in those items:
<sup>machine translation, not official</sup>

  **一から三まで**  略
  <sup>suppl-4151-8/art-1/par-1/item-1-to-3 · https://japanlaw.org/ja/inheritance-tax-act/suppl-4151-8/art-1/par-1/item-1-to-3 · https://japanlaw.org/l/325AC0000000073/suppl-4151-8/art-1/par-1/item-1-to-3</sup>
  Omitted
  <sup>machine translation, not official</sup>

  **四**  次に掲げる規定　平成十五年十月一日
  <sup>suppl-4151-8/art-1/par-1/item-4 · https://japanlaw.org/ja/inheritance-tax-act/suppl-4151-8/art-1/par-1/item-4 · https://japanlaw.org/l/325AC0000000073/suppl-4151-8/art-1/par-1/item-4</sup>
  the following provisions: October 1, 2003;
  <sup>machine translation, not official</sup>

    **イ及びロ**  略
    <sup>suppl-4151-8/art-1/par-1/item-4/sub-1 · https://japanlaw.org/ja/inheritance-tax-act/suppl-4151-8/art-1/par-1/item-4/sub-1 · https://japanlaw.org/l/325AC0000000073/suppl-4151-8/art-1/par-1/item-4/sub-1</sup>
    Omitted
    <sup>machine translation, not official</sup>

    **ハ**  第三条中相続税法第十四条第二項の改正規定（「石油税」を「石油石炭税」に改める部分に限る。）
    <sup>suppl-4151-8/art-1/par-1/item-4/sub-2 · https://japanlaw.org/ja/inheritance-tax-act/suppl-4151-8/art-1/par-1/item-4/sub-2 · https://japanlaw.org/l/325AC0000000073/suppl-4151-8/art-1/par-1/item-4/sub-2</sup>
    the provisions of Article 3 amending Article 14, paragraph (2) of the Inheritance Tax Act (limited to the part replacing "petroleum tax" with "petroleum and coal tax").
    <sup>machine translation, not official</sup>

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## Sources

- e-Gov 法令検索, Digital Agency (デジタル庁) — 相続税法 — the text in force from 2026-04-01 (https://laws.e-gov.go.jp/law/325AC0000000073/20260401_506AC0000000008), retrieved 2026-10-11
- Japanese Law Translation Database System, Ministry of Justice (法務省) — 相続税法 — its English title as the Ministry of Justice's translation database lists it (https://www.japaneselawtranslation.go.jp/en/laws/view/449), retrieved 2026-09-18
- claude-sonnet-5-5 — Machine translation, batch inheritance-tax-act-20261011T162312-035, translated 2026-10-12
- This site's parser, version 190 — 相続税法 — structure, counts, cross-references and defined terms, computed 2026-10-11