Sung Jae-gi (Korea:성재기, china:成在基, Önwa ilo mmụọ 11, 1967 — Önwa Ifejiọkü 26, 2013) bụ onye ndịda Korea na Oke ruru mmadu onye mmume, obodo ziri ezi onye mmume, liberalism Ákọ na Uche.