The Unified Socialist League (, abbreviated Tōshadō) was a pro-Soviet communist organization in Japan, founded on May 3, 1962. The Unified Socialist League was led by Kasuga Shōjirō, formerly a leading figure in the Japanese Communist Party. Makoto Omori was the general secretary of the organization.Nihon Shakai Shisō Kenkyūsho (Tokyo, Japan). Japan Interpreter. Tokyo: Center for Japanese Social and Political Studies], 1970. p. 93 The organization emerged from a split from the Preparatory Communission for a Socialist Reform Movement (a.k.a. the 'Socialist Renovation' group). The membership of the Unified Socialist League (numbering around 600) was dominated by students, and the organization had a student wing called the Socialist Student Front.Scalapino, Robert A. The Japanese Communist Movement, 1920–1966. Berkeley: University of California Press, 1967. pp. 144-145
The Unified Socialist League published a monthly journal, Kōzō Kaikaku ('Structural Reform'). It had a circulation of around 2,200. Kōzō Kaikaku was published between May 1962 and December 1963. In May 1964 the Unified Socialist League launched a new publication, Heiwa to Shakaishugi.Tōkyō Daigaku. Annals of the Institute of Social Science. Tokyo, Japan: The Institute, University of Tōkyō, 1966. p. 109
The Unified Socialist League repeatedly attacked the Communist Party of Japan, arguing that the party lacked internal democracy and that it was subservient to Chinese interests. The Unified Socialist League did not put forth candidates in national elections.Staar, Richard Felix, Milorad M. Drachkovitch, and Lewis H. Gann. Yearbook on International Communist Affairs. Stanford, Calif: Hoover Institution Press, 1966. p. 341 (Yearbook on International Communist Affairs series)
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