Similar to 赤色労働組合インターナショナル

Pan-Pacific Trade Union Secretariat

Communist International

Far Eastern Bureau of the Communist International

List of left-wing internationals

Spanish Regional Federation of the IWA

International Workingmen's Association

Second International

Fourth International

International Red Aid

Cominform

International Working Union of Socialist Parties

Fifth International

International Union of Food, Agricultural, Hotel, Restaurant, Catering, Tobacco and Allied Workers' Associations

Social fascism

Asian Socialist Conference

International Federation of Trade Unions

Party of European Socialists

Young Communist International

International Union of Socialist Youth

Revolutionary Communist International

Progressive Alliance

World Peace Council

Committee for a Workers' International

Labour and Socialist International

IndustriALL Global Union

European Metalworkers' Federation