Sung Jae-ki cyangwa Sung Jae-gi(izina mu gikoreya : 성재기, izina mu gishinwa : 成在基, 11 Nzeri 1967 - 26 Nyakanga 2013) ni Human right activists and Civil right activists, Liberalism Philosopher wa Koreya y’Amajyepfo. muri 2008, founder ni Association wa Koreya Abagabo(남성연대 男性連帶).