Affiliated Organizations
Many unions are affiliated to Rengo:
- UI ZENSEN The Japanese Federation of Textile, Chemical, Food, Commercial, Service and General Workers' Unions (986,414 members as of 2009)
- JICHIRO All-Japan Prefectural and Municipal Workers Union (887,174 members as of 2009)
- JIDOSHA SOREN Confederation of Japan Automobile Workers' Unions (JAW) (741,747 members as of 2009)
- DENKI RENGO Japanese Electrical Electronic & Information Union (616,571 members as of 2009)
- JAM Japanese Association of Metal, Machinery and Manufacturing Workers (370,256 members as of 2009)
- NIKKYOSO Japan Teachers' Union (JTU) (290,857 members as of 2009)
- KIKAN ROREN Japan Federation of Basic Industry Workers' Unions (JBU) (248,781 members as of 2009)
- SEIHO ROREN National Federation of Life Insurance Workers' Unions (241,967 members as of 2009)
- ICTJ The Federation of Information and Communication Technology Service Workers of Japan (220,730 members as of 2009)
- JPGU Japan Postal Group Union (216,186 members as of 2009)
- DENRYOKU SOREN The Federation of Electric Power Related Industry Workers' Unions of Japan (214,019 members as of 2009)
- JSD Japan Federation of Service and Distributive Workers Unions (210,234 members as of 2009)
- JEC RENGO Japan Federation of Energy and Chemistry Workers Unions (158,958 members as of 2009)
- UNYU ROREN All Japan Federation of Transport Workers' Unions (128,407 members as of 2009)
- SHITETSU SOREN General Federation of Private Railway & Bus Workers' Unions of Japan (111,944 members as of 2009)
- KOKKO RENGO Japan Public Sector Union (110,766 members as of 2009)
- FOOD RENGO Federation of All Japan Foods and Tobacco Workers' Unions (JFU) (97,762 members as of 2009)
- SONPO ROREN Federation of Non-Life Insurance Workers' Unions of Japan (FNIU) (68,027 members as of 2009)
- JR RENGO Japan Railway Trade Unions Confederation (JRTU) (63,000 members as of 2009)
- JR SOREN Japan Confederation of Railway Workers' Unions (JRU) (55,046 members as of 2009)
- KOTSU-ROREN Japan Federation of Transport Workers' Unions (JFT) (53,835 members as of 2009)
- KAIIN KUMIAI All Japan Seamen's Union (JSU) (45,000 members as of 2009)
- SERVICE RENGO Japan Federation of Service & Tourism Industries Workers' Unions (44,029 members as of 2009)
- GOMU RENGO Japanese Rubber Workers' Union Confederation (43,481 members as of 2009)
- KOKU RENGO Japan Federation of Aviation Industry Unions (JFAIU) (36,183 members as of 2009)
- ZENJIKO ROREN National Federation of Automobile Transport Workers Unions (35,285 members as of 2009)
- KAMIPA RENGO Japanese Federation of Pulp and Paper Workers' Unions (30,713 members as of 2009)
- ZEN DENSEN Japan Federation of Electric Wire Workers' Unions (JEWU) (28,205 members as of 2009)
- TOSHIKO The All Japan Municipal Transport Workers’ Union (27,864 members as of 2009)
- ZEN SUIDO All-Japan Water Supply Workers’ Union (25,998 members as of 2009)
- ZENKOKU GAS The Federation of Gas Workers' Unions of Japan (25,676 members as of 2009)
- INSATSU ROREN Federation of Printing Information Media Workers' Unions (20,667 as of 2009)
- CERAMICS RENGO All Japan Federation of Ceramics Industry Workers (18,900 members as of 2009)
- ZENGIN RENGO All Japan Federative Council of Bank Labours' Unions (15,590 members as of 2009)
- ZENKOKU-NODANRO National Federation of Agricultural, Forestry and Fishery Corporations' Workers' Unions (15,446 members as of 2009)
- NHK ROREN The Federation of All-NHK Labour Unions (11,584 members as of 2009)
- SHINRIN ROREN Federation of All Japanese Forest-relating-industries Workers' Unions (8,295 members as of 2009)
- Health Care ROKYO Japanese Health Care Workers' Union (7,777 members as of 2009)
- ZEN ROKIN Federation of Labour Bank Workers Unions of Japan (6,397 members as of 2009)
- KENSETSU RENGO Japan Construction Trade Union Confederation (6,000 members as of 2009)
- ZENSHIN ROREN All Japan Community Bank Labour Union Association (4,906 members as of 2009)
- ZEN INSATSU All Printing Bureau Labour Union (4,568 members as of 2009)
- ROKYO ROREN (3,860 members as of 2009)
- ROSAI ROREN Federation of ZENROSAI Trade Unions (3,378 members as of 2009)
- ZENKOKU UNION Japan Community Workers Union Federation (3,350 members as of 2009)
- JICHI ROREN National Federation of Prefectural and Municipal Workers' Unions (3,302 members as of 2009)
- ZENKOKU KEIBA RENGO National Federation of Horse-racing Workers (3,032 members as of 2009)
- ZENZOSEN-KIKAI All Japan Shipbuilding and Engineering Union (1,389 members as of 2009)
- JA RENGO All Japan Agriculture Cooperative Staff Members' Union (1,296 members as of 2009)
- KOUN-DOMEI Japanese Confederation of Port and Transport Workers' Unions (1,200 members as of 2009)
- ZEN ZOHEI All Mint Labour Union (995 members as of 2009)
- ZEN-EIEN National Cinema and Theater Workers' Union (300 members as of 2009)
- KOKU RENGO Japan Federation of Aviation Industry Unions (JFAIU)
Observer affiliate:
- DOKIRO Hokkaido Seasonal Workers' Union (2,660 members as of 2009)
Friendly affiliate:
- NIKKENKYO Council of Japan Construction Industry Employee's Unions (35,624 members as of 2009)
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