# 相続税法 / Inheritance Tax Act — 附　則 (Supplementary Provisions)

- 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: 附　則 (Supplementary Provisions) — address `suppl-3551-51`
- Text in force since: 2026-04-01
- URL (the page that opens at this provision): https://japanlaw.org/ja/inheritance-tax-act/suppl-3551-51
- Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/325AC0000000073/suppl-3551-51
- 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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## 附　則 昭和五五年五月一七日法律第五一号
<sup>suppl-3551-51 · https://japanlaw.org/ja/inheritance-tax-act/suppl-3551-51 · https://japanlaw.org/l/325AC0000000073/suppl-3551-51</sup>

**第一項**  この法律は、昭和五十六年一月一日から施行する。
<sup>suppl-3551-51/par-1 · https://japanlaw.org/ja/inheritance-tax-act/suppl-3551-51/par-1 · https://japanlaw.org/l/325AC0000000073/suppl-3551-51/par-1</sup>
This Act comes into effect as of January 1, 1981.
<sup>machine translation, not official</sup>

**第六項**  前項の規定による改正後の相続税法の規定は、この法律の施行の日以後に相続又は遺贈（贈与者の死亡により効力を生ずる贈与を含む。以下同じ。）により取得した財産に係る相続税について適用し、同日前に相続又は遺贈により取得した財産に係る相続税については、なお従前の例による。
<sup>suppl-3551-51/par-6 · https://japanlaw.org/ja/inheritance-tax-act/suppl-3551-51/par-6 · https://japanlaw.org/l/325AC0000000073/suppl-3551-51/par-6</sup>
The provisions of the Inheritance Tax Act as amended pursuant to the provisions of the preceding paragraph apply to inheritance tax on property acquired by inheritance or bequest (including a gift that takes effect upon the death of the donor; the same applies hereinafter) on or after the day on which this Act comes into effect, and the provisions then in force continue to govern inheritance tax on property acquired by inheritance or bequest before that day.
<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-20261011T162312-030, 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