Background
Executives of four major general contractors agreed to designate intended winners and coordinate bid prices for contracts to build underground terminal stations at Shinagawa and Nagoya for the Chuo Shinkansen maglev project. The project owner had invited the four contractors to submit competing estimates for several construction sections. In accordance with their agreement, the contractors exchanged cost and pricing information and adjusted their estimates to support the designated bidder for each section.
The defendants argued that genuine competition had never existed because the unprecedented scale and technical difficulty of the work meant that only contractors previously asked by the project owner to conduct technical studies could realistically perform the relevant sections. They characterized the other firms’ participation and submissions as merely formal. The trial court rejected that position and found an unlawful restraint of trade; the Tokyo High Court affirmed.
The Court’s Holding
The Supreme Court unanimously dismissed all appeals. It held that, when realistic ability to supply the relevant services is disputed, a court should first examine objective facts concerning the nature of the work and each firm’s capacity to perform it. The four contractors possessed substantial technical expertise, personnel, equipment, and experience with construction near operating railway lines and with building underground structures beneath existing facilities. They could also draw on specialist subcontractors and joint-venture partners.
The Court found that each contractor realistically could have performed the project work, including sections for which it had not conducted the owner’s preliminary technical studies. Actual contract performance reinforced that conclusion: firms successfully performed divided portions for which they had not undertaken the earlier studies. The contractors therefore had enough capacity to constrain one another’s proposed terms.
Against that objective background, the exchange of cost and bid information removed a prerequisite for effective competition and enabled the four firms to influence successful bidders and prices with a degree of freedom. Their conduct consequently “substantially restrained competition” in the relevant field of trade under Article 2(6) of Japan’s Antimonopoly Act. Justice Eriko Watanabe added that subjective matters—such as the purchaser’s expectation of competition or the firms’ intent to coordinate—cannot substitute for an objective assessment of realistic supply capacity.
Key Takeaways
- A substantial-restraint finding requires an objective inquiry into whether multiple firms realistically could supply the relevant goods or services.
- Capacity may be established through technical experience, personnel and physical resources, transferable methods, specialist assistance, joint ventures, and evidence of actual performance.
- Participation in a bidding process, standing alone, does not necessarily prove realistic capacity, because firms may participate for reasons unrelated to an ability or intention to perform.
- Competitors substantially restrain competition when their coordination disables competitive constraints and permits them to influence contract awards and prices.
Why It Matters
The decision provides an important framework for applying Japan’s criminal prohibition on unreasonable restraints of trade where defendants contend that the supposed competitors could not actually perform the work. Courts must identify objective evidence of supply capacity rather than infer competitive harm merely from communications or formal bidding activity.
For complex infrastructure procurement, the ruling also confirms that firms need not possess identical project-specific preparation to be competitors. Transferable expertise and access to subcontractor or joint-venture resources may establish realistic competitive capacity, making bid allocation and price coordination subject to antitrust liability.