The National Union of Coal Mine Workers (Zentanko) was a trade union representing coal miners in Japan. The union was founded in 1952, with the merger of a union which had split from the

Japan Coal Miners' Union The Japan Coal Miners' Union ( ja, 日本炭鉱労働組合, Tanro), was a trade union representing coal miners in Japan. The union was established in 1950, initially with about 290,000 members. It affiliated to the General Council of Trade Unio ...

in 1949 with another dissident faction of that union. It was a founding affiliate of the

Japanese Confederation of Labour The Japanese Confederation of Labour (Domei; ja, 全日本労働総同盟) was a national trade union federation in Japan. The federation was founded in 1964, with the merger of the All-Japan Trade Union Congress, the National Council of Governme ...

, and by 1967, it had 31,799 members. It transferred to the

Japanese Trade Union Confederation The , commonly known as , is the largest national trade union center in Japan, with over six million members as of 2011.Rengo websitRengo brochure 2010-2011 Retrieved on July 6, 2012 It was founded in 1989 as a result of the merger of the Japan ...

at the end of the 1980s, but lost members as the industry declined, and by 1996 was down to 1,750 members.{{cite web , title=List of RENGO affiliated union members , url=http://www.crosscurrents.hawaii.edu/assets/jwork/extra/doc/JWORK089_377.pdf , website=Cross Currents , access-date=18 November 2021

References

Mining trade unions Trade unions established in 1952 Trade unions in Japan