Justice Party 정의당 Jeonguidang Leader Sim Sang-jung (standing) Na Gyung-che Floor Leader Roh Hoe-chan Founded 21 October 2012 (2012-10-21) Merger of People's Conference Labor Politics Coalition Elements of the Labor Party Split from Unified Progressive Party Headquarters 7, Gukhoe-daero 70-gil, Yeongdeungpo District, Seoul Membership (2016) 35,000 [1] Ideology Reformism[2] Progressivism[2] Green politics[3] Political position Centre-left[4] to Left-wing[5] Colours Yellow Slogan Labor's Hope, Citizen's Dream (노동의 희망, 시민의 꿈, Nodongi himang, simini kkum) Seats in the National Assembly 6 / 300 Seats within local government 17 / 3,687 Website Justice21.org/ Politics of South Korea Political parties Elections