Sung Jae-gi, South Korean philosopher and activist (born 1967)

Sung Jae-gi was a South Korean men's rights activist. Sung was the leader of various masculinist and anti-feminist organizations, including the Association of Anti-Feminism and Male Liberation, Association for the Abolition of the Ministry of Women, and Man of Korea. Sung also ran a shelter for homeless men, male victims of violent crime, teenage runaways, and gay and transgender men.