The All Printing Bureau Labour Union (PLU, Japanese: 全印刷局労働組合, Zen Insatsu) is a trade union representing workers in the printing industry in Japan.
The union was founded on 1 April 1947, with the merger of several recently founded company unions.
[1] It was later affiliated with the General Council of Trade Unions of Japan, and by 1958 it had 7,340 members, all working at what became the National Printing Bureau.
[2][1] By the late 1980s, it became affiliated with the Japanese Trade Union Confederation, but by 2020 its membership had fallen to 4,060.
[3]