# 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) This is the Markdown twin of https://japanlaw.org/en/antimonopoly-act/suppl-4111-80. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp. - 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-4111-80` - Text in force since: 2026-05-21 - URL (the page that opens at this provision): https://japanlaw.org/en/antimonopoly-act/suppl-4111-80 - 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. --- ## 附　則 平成一一年六月二三日法律第八〇号 suppl-4111-80 · https://japanlaw.org/en/antimonopoly-act/suppl-4111-80 ### 第一条（施行期日） — Effective Date caption: machine translation, not official suppl-4111-80/art-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4111-80/art-1 **第一項** この法律は、公布の日から起算して一月を経過した日から施行する。 suppl-4111-80/art-1/par-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4111-80/art-1/par-1 This Act comes into effect as of the day on which 1 month has elapsed from the date of promulgation. machine translation, not official ### 第五条（罰則に関する経過措置） — Transitional Measures Concerning Penal Provisions caption: machine translation, not official suppl-4111-80/art-5 · https://japanlaw.org/en/antimonopoly-act/suppl-4111-80/art-5 **第一項** この法律の施行前にした行為及び附則第三条第一項の規定によりなお従前の例によることとされる場合におけるこの法律の施行後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。 suppl-4111-80/art-5/par-1 · https://japanlaw.org/en/antimonopoly-act/suppl-4111-80/art-5/par-1 With regard to the application of penal provisions to acts committed before this Act comes into effect and to acts committed after this Act comes into effect in the cases where the provisions then in force are to continue to govern pursuant to the provisions of Article 3, paragraph (1) of the Supplementary Provisions, the provisions then in force continue to govern. machine translation, not official --- ## 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-20261106T060022-009, translated 2026-11-06 - claude-sonnet-5-5 — Machine translation, batch antimonopoly-act-20261106T060022-010, 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