# 私的独占の禁止及び公正取引の確保に関する法律 / Act on Prohibition of Private Monopolization and Maintenance of Fair Trade — 附　則 (Supplementary Provisions)

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- Law: 私的独占の禁止及び公正取引の確保に関する法律 (Act on Prohibition of Private Monopolization and Maintenance of Fair Trade), 昭和二十二年法律第五十四号
- English title "Act on Prohibition of Private Monopolization and Maintenance of Fair Trade": 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: 附　則 (Supplementary Provisions) — address `suppl-4151-54`
- Text in force since: 2026-05-21
- URL (the page that opens at this provision): https://japanlaw.org/en/antimonopoly-act/suppl-4151-54
- e-Gov law ID: 322AC0000000054 — 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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## 附　則 平成一五年五月三〇日法律第五四号
<sup>suppl-4151-54 · https://japanlaw.org/en/antimonopoly-act/suppl-4151-54</sup>

### 第一条（施行期日） — Effective Date
<sup>caption: machine translation, not official</sup>
<sup>suppl-4151-54/art-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4151-54/art-1</sup>

**第一項**  この法律は、平成十六年四月一日から施行する。
<sup>suppl-4151-54/art-1/par-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4151-54/art-1/par-1</sup>
This Act comes into effect on April 1, 2004.
<sup>machine translation, not official</sup>

### 第三十八条（罰則の適用に関する経過措置） — Transitional Measures Concerning the Application of Penal Provisions
<sup>caption: machine translation, not official</sup>
<sup>suppl-4151-54/art-38 · https://japanlaw.org/en/antimonopoly-act/suppl-4151-54/art-38</sup>

**第一項**  この法律の施行前にした行為に対する罰則の適用については、なお従前の例による。
<sup>suppl-4151-54/art-38/par-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4151-54/art-38/par-1</sup>
With regard to the application of penal provisions to acts committed before this Act comes into effect, the provisions then in force continue to govern.
<sup>machine translation, not official</sup>

### 第三十九条（その他の経過措置の政令への委任） — Delegation of Other Transitional Measures to Cabinet Order
<sup>caption: machine translation, not official</sup>
<sup>suppl-4151-54/art-39 · https://japanlaw.org/en/antimonopoly-act/suppl-4151-54/art-39</sup>

**第一項**  この法律に規定するもののほか、この法律の施行に伴い必要な経過措置は、政令で定める。
<sup>suppl-4151-54/art-39/par-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4151-54/art-39/par-1</sup>
Beyond what is provided for in this Act, transitional measures necessary in connection with the enforcement of this Act are specified by Cabinet Order.
<sup>machine translation, not official</sup>

---

## Sources

- e-Gov 法令検索, Digital Agency (デジタル庁) — 私的独占の禁止及び公正取引の確保に関する法律 — the text in force from 2026-05-21 (https://laws.e-gov.go.jp/law/322AC0000000054/20260521_505AC0000000063), retrieved 2026-11-06
- Japanese Law Translation Database System, Ministry of Justice (法務省) — Act on Prohibition of Private Monopolization and Maintenance of Fair Trade — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/5212/tb), retrieved 2026-11-06
- claude-sonnet-5-5 — Machine translation, batch antimonopoly-act-20261106T060022-006, translated 2026-11-06
- claude-sonnet-5-5 — Machine translation, batch antimonopoly-act-20261106T060022-008, translated 2026-11-06
- claude-sonnet-5-5 — Machine translation, batch antimonopoly-act-20261106T060022-011, translated 2026-11-06
- This site's parser, version 225 — 私的独占の禁止及び公正取引の確保に関する法律 — structure, counts, cross-references and defined terms, computed 2026-11-06