The General Federation of Ship Building Workers' Unions (Zosensoren) was a trade union representing workers in the shipbuilding industry in Japan.
[1] It was affiliated with the Japanese Federation of Labour, and by 1958 had 28,462 members.
[2] Next, it became affiliated with the Japanese Confederation of Labour, and by 1967 had grown to 58,344 members.
[3] The union was keen on merging with smaller competitors.
In 1972, it achieved this, when it joined the new Japan Confederation of Shipbuilding and Engineering Workers' Unions.