Eizō, Hitoshi Yamakawa, and Sakai Toshihiko held secret meetings in 1921, where they planned the creation of the party.
[3] The founding group of the party consisted of radical intellectuals, many of them former students of Waseda University and members of the Society of Enlightened People.
According to Takase, the name of the organization was "Gyōmin Communist Group" and was more of an informal association than a structured party.
[5] Less than a month after the founding meeting, the party began to distribute propaganda in Tokyo, Osaka, Kobe and Kyoto.
In November, the party circulated two sets of anti-militarist/anti-war leaflets to soldiers, who had gathered in the Tokyo area for a large-scale military exercise.
[4] Moreover, the party was contacted by a Comintern representative visiting Japan with the request to send a delegate to the Congress of the Peoples of the Far East.