Japan's Antimonopoly Act prohibits: private monopolization (Art. 3 first half), unreasonable restraint of trade/cartels (Art. 3 second half), and unfair trade practices (Art. 19). Cartel types: price-fixing, bid-rigging, market allocation. Surcharges (Art. 7-2): 10% of sales for cartels/bid-rigging, 6% for exclusionary monopolization, 1% for abuse of superior bargaining position. Leniency program (Art. 7-4): first reporter gets full immunity, second 20% reduction. Criminal penalties: up to 5 years imprisonment/¥5M fine for individuals, ¥500M for corporations (Art. 89, 95). Strict liability for damages (Art. 25).
Antitrust and Cartel Regulation in Japan: Violations and Penalties
Key Takeaways
- ✓Cartels and bid rigging face surcharges based on a percentage of sales
- ✓The leniency program grants immunity to the first company to self-report
- ✓Criminal penalties including imprisonment and fines may also apply
- ✓The Fair Trade Commission holds authority to investigate and impose penalties
Free Tools for This Area
Related Articles
Can You Commercially Use Generative AI Output in Japan? Copyright Article 30-4 and Output-Stage Risk
Whether you can commercially use generative AI output in Japan, from a copyright standpoint: how Article 30-4 relaxes the training stage and its proviso, the distinction between training and output, the reliance-plus-similarity test that applies at the output stage, mixed enjoyment purposes, the Agency for Cultural Affairs’ view, and practical steps.
Foreign Company Entering Japan: Choosing an Entity Type and the Governing Law of Your Contracts
How a foreign company can enter Japan: the differences among a representative office, a branch, and a subsidiary; comparing the KK and GK company forms; designing the governing law and dispute resolution of local contracts; inward direct investment filings under the Foreign Exchange Act; industry-specific licenses; and the practical steps.
Japan APPI Data Breach Reporting: A Guide for Foreign Companies (Deadlines & Notification)
How Japan’s APPI data breach reporting obligations apply to foreign companies handling the personal data of individuals in Japan, including extraterritorial reach, the four reportable breach categories, PPC two-stage reporting deadlines, individual notification, penalties, and the 2026 reform.
Starting a Business in Japan: KK vs LLC Comparison
Comparing stock corporations (KK) and limited liability companies (GK/LLC) for business formation in Japan.
Director Liability in Japan: Duties, Obligations, and Risks
Guide to director duties and liability in Japanese corporate law, including fiduciary duties and shareholder derivative suits.
Labor Compliance for Japanese Companies: Key Regulations and Penalties
Comprehensive guide to labor compliance for Japanese companies, covering key regulations and penalties.
Related Q&A
Q. How much does it cost to establish a company in Japan?
Q. Can directors be personally liable for damages?
Q. Is a shareholders' agreement legally binding in Japan?
Q. How enforceable are non-compete clauses after leaving a company?
Q. Can you terminate a business contract before it expires?
Q. How much does trademark registration cost and how long does it take?
Related Legal Terms
Recommended Articles
See allStarting a Business in Japan: KK vs LLC Comparison
Comparing stock corporations (KK) and limited liability companies (GK/LLC) for business formation in Japan.
Read moreCorporate LawDirector Liability in Japan: Duties, Obligations, and Risks
Guide to director duties and liability in Japanese corporate law, including fiduciary duties and shareholder derivative suits.
Read moreCorporate LawLabor Compliance for Japanese Companies: Key Regulations and Penalties
Comprehensive guide to labor compliance for Japanese companies, covering key regulations and penalties.
Read moreCorporate LawIntellectual Property Basics in Japan: Patents, Trademarks, and Copyrights
Overview of intellectual property rights in Japan: patents, trademarks, designs, and copyrights.
Read moreCorporate LawShareholders' Meeting Procedures in Japan: From Notice to Resolution
Guide to shareholders' meeting procedures in Japan, including notice requirements and resolution types.
Read moreCorporate LawBusiness Succession in Japan: Family, M&A, and MBO Options
Guide to business succession options for Japanese SMEs, including tax benefits and the Business Succession Facilitation Act.
Read moreConsult a Legal Professional Early
This article provides general information; outcomes vary by specific circumstances. Contact your local bar association for case-specific advice.
- Statutes & case law
- Free legal calculators
- Lawyer-reviewed