Joffe was sent by the recommendation of Sen KATAYAMA who had been staying in Moscow at the time as a member of the Communist Party of the USA, and the meeting was mediated by Tamiji NAITO and Unzo TAGUCHI, socialists who organized the Reimei-kai Organization.
ヨッフェは当時モスクワに滞在していたアメリカ共産党員・片山潜の推薦を受けて派遣されたもので、仲介したのは黎明会を組織した内藤民治と田口運蔵等の社会主義者であった。