Heiminsha is a newspaper company established by newspaper reporters of "Yorozu-choho" newspaper company, Shusui KOTOKU and Toshihiko SAKAI (KOSEN), to promote and spread socialist thoughts, who retired from the Choho press company in order to insist their claim of pacifism, when the company, which had been claiming pacifism against the move to the Russo-Japanese War, shifted its policy from pacifism to the theory of making war.
平民社（へいみんしゃ）は、1903年11月に、日露戦争を開戦しようとする動きに対して非戦論を主張していた『萬朝報』が、社論を開戦論へと転換したときに、非戦論を訴えつづけていた同紙記者の幸徳秋水と堺利彦（枯川）が、非戦論の主張を貫くために朝報社を退社し、あらたに非戦論を訴え、社会主義思想の宣伝・普及をおこなうために開業した新聞社。