Zensendomei (Japanese: ゼンセン同盟) was a trade union representing workers in light manufacturing and service industries.
In 1950, it moved to the new All-Japan Trade Union Congress, and then in 1964 to its successor, the Japanese Confederation of Labour.
By 1967, it was the federation's largest affiliate, and the third-largest union in Japan, with 505,461 members.
It soon began representing workers in the wholesale trade, and by the mid-1990s was considered unique among Japanese unions in employing large numbers of organisers, and negotiating pay and conditions on an industry-wide basis.
[5] Despite its large membership, the union was often regarded as weak and uncombative, and in later years, it struggled with declining employment in the textile industry.