The All Japan Federation of Metal Miners' Unions (, Zenko) was a

trade union A trade union (British English) or labor union (American English), often simply referred to as a union, is an organization of workers whose purpose is to maintain or improve the conditions of their employment, such as attaining better wages ...

representing ore miners in Japan. The union was founded in 1947, and it later affiliated to the

General Council of Trade Unions of Japan A general officer is an officer of high rank in the armies, and in some nations' air and space forces, marines or naval infantry. In some usages, the term "general officer" refers to a rank above colonel."general, adj. and n.". OED Online. Ma ...

. By 1958, it had 57,000 members, although membership fell to 31,984 by 1970, and only 10,290 in 1980, in line with a decline in employment in the industry.{{cite web , title=百科事典マイペディアの解説 , url=https://kotobank.jp/word/%E5%85%A8%E6%97%A5%E6%9C%AC%E9%87%91%E5%B1%9E%E9%89%B1%E5%B1%B1%E5%8A%B4%E5%83%8D%E7%B5%84%E5%90%88%E9%80%A3%E5%90%88%E4%BC%9A-847593 , website=Kotobank , access-date=5 February 2022 In 1982, it merged into the new All Japan Federation of Non-Ferrous Metal Workers' Unions.

References

Mining trade unions Trade unions established in 1947 Trade unions disestablished in 1982 Trade unions in Japan