A. The Plaintiff is a person who runs a liquefied petroleum gas supply business, and Defendant B Co., Ltd. (hereinafter “Defendant B”), and C Co., Ltd. (former trade name: E Co., Ltd.; hereinafter “Defendant C”) are companies engaged in textile and processing business.

B. Although the Defendants were engaged in the process of using liquefied natural gas (urban gas) originally, the Defendants began to be supplied with liquefied petroleum gas from October 1, 2015 to the Plaintiff on the following grounds: (a) the Plaintiff’s supply of liquefied petroleum gas may reduce costs by acquiring liquefied petroleum gas supplied by the Plaintiff.

C. On October 22, 2015, the Plaintiff and the Defendants concluded each of the following liquefied petroleum gas supply agreements with which the Defendants would be supplied with liquefied petroleum gas from October 1, 2015 to September 30, 2020:

(The Defendant concluded a liquefied petroleum gas supply contract with the Plaintiff, but the content of which is consistent, and thus, the “instant supply contract” in which the Defendants concluded with the Plaintiff is collectively referred to as “the instant liquefied petroleum gas supply contract,” but the part relating to “a separate lot” in the end of the contract below was concluded between the Plaintiff and the Defendant. The Plaintiffs in the liquefied petroleum gas supply contract prove that the Plaintiff purchased the entire quantity of the requirements for “A” to be handled by “A” (hereinafter “products”) from “B” and that “B” promised to supply the same.

Article 1 (Products) The products sold to “B” are as follows:

The selling price of the products supplied by “B” under Article 2 (Price of Liquefied Petroleum Gas) and “B” shall be automatically linked to the changed price when there is a change in the selling price of the importer of “B” as of September 2015.