The party primarily adheres to social democracy.

The party was founded on 31 October 1950 during the US occupation of the region.

On 29 April 1952, the party launched an Association for Promotion of Reversion to Japan, which initiated a signature campaign for the demand of reunification with Japan.

The campaign gathered more than 199,000 signatures (72%+ of the eligible voters of Okinawa).

[2] At the time, such a campaign was initiated by liberals/leftists, including Okinawa Social Mass Party and another local party called Okinawan People's Party (沖縄人民党, Okinawa Jinmin-tō).