Sung Jae-Ki (Korean: 성재기, Hanja: 成在基, September 11, 1967 - July 26, 2013) was a South Korean Masculist and Civil Activist, human right activists. He was the leader of 'Men of Korea' (남성연대), a group advocating men's rights and the abolition of the Ministry of Gender Equality and Family. 2007 and 2012 presidential election time, Sung was appeal Abolition of Ministry of Woman(여성부 女性部).