The Federation of Gas Workers' Unions of Japan (Japanese: 全国ガス労働組合連合会, Zenkoku Gas) is a trade union representing workers in the gas supply industry in Japan.
The union was founded in 1947, and later affiliated to the Federation of Independent Unions.
[1] By 1970, it had 19,403 members.
[2] In 1989, it affiliated to the Japanese Trade Union Confederation.
[1] By 2020, it had 23,248 members.