# 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 — 第十五条の三 (Article 15-3) This is the Markdown twin of https://japanlaw.org/ja/antimonopoly-act/art-15-3. 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: 第十五条の三 (Article 15-3) — address `art-15-3` - Text in force since: 2026-05-21 - URL (the page that opens at this provision): https://japanlaw.org/ja/antimonopoly-act/art-15-3 - 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. --- ### 第十五条の三 art-15-3 · https://japanlaw.org/ja/antimonopoly-act/art-15-3 **第一項** 会社は、次の各号のいずれかに該当する場合には、共同株式移転（会社が他の会社と共同してする株式移転をいう。以下同じ。）をしてはならない。 art-15-3/par-1 · https://japanlaw.org/ja/antimonopoly-act/art-15-3/par-1 No company must engage in a joint share transfer (meaning a share transfer carried out by a company jointly with another company; the same applies hereinafter) if it falls under either of the following items: Ministry of Justice translation — Japanese Law Translation Database System **一** 当該共同株式移転によつて一定の取引分野における競争を実質的に制限することとなる場合 art-15-3/par-1/item-1 · https://japanlaw.org/ja/antimonopoly-act/art-15-3/par-1/item-1 if the joint share transfer substantially restrains competition in a particular field of trade, or Ministry of Justice translation — Japanese Law Translation Database System **二** 当該共同株式移転が不公正な取引方法によるものである場合 art-15-3/par-1/item-2 · https://japanlaw.org/ja/antimonopoly-act/art-15-3/par-1/item-2 if unfair trade practices have been employed in the course of the share transfer. Ministry of Justice translation — Japanese Law Translation Database System **第二項** 会社は、共同株式移転をしようとする場合において、当該共同株式移転をしようとする会社のうち、いずれか一の会社に係る国内売上高合計額が二百億円を下回らない範囲内において政令で定める金額を超え、かつ、他のいずれか一の会社に係る国内売上高合計額が五十億円を下回らない範囲内において政令で定める金額を超えるときは、公正取引委員会規則で定めるところにより、あらかじめ当該共同株式移転に関する計画を公正取引委員会に届け出なければならない。ただし、すべての共同株式移転をしようとする会社が同一の企業結合集団に属する場合は、この限りでない。 art-15-3/par-2 · https://japanlaw.org/ja/antimonopoly-act/art-15-3/par-2 Every company that intends to engage in a joint share transfer must notify the Japan Fair Trade Commission in advance of its plan with regard to the share transfer pursuant to the provisions of the Rules of the Japan Fair Trade Commission if the total domestic sales amount of any one of the companies intending to be parties to the joint share transfer exceeds the amount provided by Cabinet Order, which must be no less than twenty billion yen, and the total domestic sales amount of any one of the other companies intending to be parties to the same joint share transfer exceeds the amount provided by Cabinet Order, which must be no less than five billion yen provided, however, that this does not apply if all the companies intending to be parties to the joint share transfer belong to the same group of combined companies. Ministry of Justice translation with a slip corrected by this site — not the Ministry's text; the Ministry printed: "Every company that intends to engage in a joint share transfer must notify the Japan Fair Trade Commission in advance of its plan with regard to the share transfer pursuant to the provisions of the Rules of the Japan Fair Trade Commission if the total amount of the domestic sales of any one of the companies intending to be parties to the joint share transfer exceeds the amount provided by Cabinet Order, which must be no less than twenty billion yen, and the total amount of the domestic sales of any one of the other companies intending to be parties to the same joint share transfer exceeds the amount provided by Cabinet Order, which must be no less than five billion yen provided, however, that this does not apply if all the companies intending to be parties to the joint share transfer belong to the same group of combined companies." — https://www.japaneselawtranslation.go.jp/en/laws/view/5212/tb **第三項** 第十条第八項から第十四項までの規定は、前項の規定による届出に係る共同株式移転の制限及び公正取引委員会がする第十七条の二第一項の規定による命令について準用する。この場合において、第十条第八項及び第十項から第十四項までの規定中「株式の取得」とあるのは「共同株式移転」と、同条第九項中「株式の取得」とあるのは「共同株式移転」と、「が株式取得会社」とあるのは「が共同株式移転をしようとする会社のうち少なくとも一の会社」と、「、株式取得会社」とあるのは「、共同株式移転をしようとする会社」と読み替えるものとする。 art-15-3/par-3 · https://japanlaw.org/ja/antimonopoly-act/art-15-3/par-3 The provisions of Article 10, paragraphs (8) through (14) apply mutatis mutandis to the restriction on joint share transfer pertaining to the notification under the preceding paragraph and to the order issued by the Japan Fair Trade Commission pursuant to Article 17-2, paragraph (1). In this case, the phrase "acquire the shares" in Article 10, paragraph (8) and the phrase "acquisition of shares" in paragraphs (10) through (14) of that Article are deemed to be replaced with "effect the joint share transfer" and "joint share transfer" respectively, and the phrases "share acquisition" and "acquisition of shares" in paragraph (9) of that Article are deemed to be replaced with "joint share transfer", the phrase "requested the acquiring company" with "requested at least one of the companies intending to engage in a joint share transfer", and the phrase "the share acquiring company" with "the companies intending to engage in a joint share transfer". machine translation, not official --- ## Cites - art-15-3/par-3: 第十条第八項から第十四項まで → 私的独占の禁止及び公正取引の確保に関する法律 第十条第十項 (Article 10, paragraph (10)), art-10/par-10 — https://japanlaw.org/ja/antimonopoly-act/art-10/par-10 - art-15-3/par-3: 第十条第八項から第十四項まで → 私的独占の禁止及び公正取引の確保に関する法律 第十条第十一項 (Article 10, paragraph (11)), art-10/par-11 — https://japanlaw.org/ja/antimonopoly-act/art-10/par-11 - art-15-3/par-3: 第十条第八項から第十四項まで → 私的独占の禁止及び公正取引の確保に関する法律 第十条第十二項 (Article 10, paragraph (12)), art-10/par-12 — https://japanlaw.org/ja/antimonopoly-act/art-10/par-12 - art-15-3/par-3: 第十条第八項から第十四項まで → 私的独占の禁止及び公正取引の確保に関する法律 第十条第十三項 (Article 10, paragraph (13)), art-10/par-13 — https://japanlaw.org/ja/antimonopoly-act/art-10/par-13 - art-15-3/par-3: 第十条第八項から第十四項まで → 私的独占の禁止及び公正取引の確保に関する法律 第十条第十四項 (Article 10, paragraph (14)), art-10/par-14 — https://japanlaw.org/ja/antimonopoly-act/art-10/par-14 - art-15-3/par-3: 第十条第八項から第十四項まで → 私的独占の禁止及び公正取引の確保に関する法律 第十条第八項 (Article 10, paragraph (8)), art-10/par-8 — https://japanlaw.org/ja/antimonopoly-act/art-10/par-8 - art-15-3/par-3: 第十条第八項から第十四項まで → 私的独占の禁止及び公正取引の確保に関する法律 第十条第九項 (Article 10, paragraph (9)), art-10/par-9 — https://japanlaw.org/ja/antimonopoly-act/art-10/par-9 - art-15-3/par-3: 前項 → 私的独占の禁止及び公正取引の確保に関する法律 第十五条の三第二項 (Article 15-3, paragraph (2)), art-15-3/par-2 — https://japanlaw.org/ja/antimonopoly-act/art-15-3/par-2 - art-15-3/par-3: 第十七条の二第一項 → 私的独占の禁止及び公正取引の確保に関する法律 第十七条の二第一項 (Article 17-2, paragraph (1)), art-17-2/par-1 — https://japanlaw.org/ja/antimonopoly-act/art-17-2/par-1 ## Cited by 9 provisions cite this one. No official source publishes this direction. - 私的独占の禁止及び公正取引の確保に関する法律 第十五条の三第三項 — https://japanlaw.org/ja/antimonopoly-act/art-15-3/par-3 - 私的独占の禁止及び公正取引の確保に関する法律 第十七条第一項 — https://japanlaw.org/ja/antimonopoly-act/art-17/par-1 - 私的独占の禁止及び公正取引の確保に関する法律 第十七条の二第一項 — https://japanlaw.org/ja/antimonopoly-act/art-17-2/par-1 - 私的独占の禁止及び公正取引の確保に関する法律 第十八条第三項 — https://japanlaw.org/ja/antimonopoly-act/art-18/par-3 - 私的独占の禁止及び公正取引の確保に関する法律 第四十八条の二第一項 — https://japanlaw.org/ja/antimonopoly-act/art-48-2/par-1 - 私的独占の禁止及び公正取引の確保に関する法律 第七十条の四第一項 — https://japanlaw.org/ja/antimonopoly-act/art-70-4/par-1 - 私的独占の禁止及び公正取引の確保に関する法律 第九十一条の二第一項第九号 — https://japanlaw.org/ja/antimonopoly-act/art-91-2/par-1/item-9 - 私的独占の禁止及び公正取引の確保に関する法律 第九十一条の二第一項第十号 — https://japanlaw.org/ja/antimonopoly-act/art-91-2/par-1/item-10 - 私的独占の禁止及び公正取引の確保に関する法律 附則第十二条第一項（共同株式移転に関する経過措置） — https://japanlaw.org/ja/antimonopoly-act/suppl-4211-51/art-12/par-1 --- ## Sources - claude-opus-5-5 — Corrections to the Ministry of Justice's English of paragraphs, written 2026-11-06 - 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 (私的独占の禁止及び公正取引の確保に関する法律), Article 15-3, paragraph (2) — the Ministry of Justice's English as printed (https://www.japaneselawtranslation.go.jp/en/laws/view/5212/tb), 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, corrected on review by claude-opus-5-5 — Machine translation corrected on review, batch antimonopoly-act-20261106T060022-003, 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