If a company at a superior bargaining position against a business partner imposes unreasonable disadvantage on the partner, this is called "abuse of superior bargaining position.

As you can see in the above illustration, acts conducted by a large supermarket such as coercive sale, unreasonable return of goods, requesting to dispatch employees and make a monetary contribution are prohibited as a type of unfair trade practices.
Many such cases have been seen in transactions with subcontractors. Under the Subcontract Act, a supplementary law to the Antimonopoly Act, more detailed restrictions are imposed on unfair conducts. The Subcontract Act prohibits a delay and reduction in the payment of subcontract proceeds, refusing to receive work from a subcontractor, the return of merchandise and other ill-treatments of subcontractors. The Fair Trade Commission promptly investigates violations to protect subcontractors.