Socialist Democratic Federation (Japan)

The Socialist Democratic Federation (社会民主連合, Shakai-minshu-rengō) (SDF), also referred to in Japanese by the shortened Shaminren (社民連), was a Japanese political party that existed from 1978 to 1994. It was formed from the merger of the Socialist Citizen's Federation (社会市民連合, Shakai-shimin-rengō) and the Shakai Club (社会クラブ, Shakai-kurabu).