Kim Sung-hee (Hangul: 김성희, born August 11, 1989), better known by his stage name Ja Mezz (Hangul: 자메즈), is a South Korean rapper.He released his first EP, 1/4, on August 11, 2015.He dropped out Hanyang University in 2017. In August 2018, He has participated in japanese MC/Singer, Mitsuhiro Hidaka's song, "Name Tag".