Kim Sung-hee (, born August 11, 1989), better known by his stage name Ja Mezz (), 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 participated in Japanese MC/Singer, Mitsuhiro Hidaka's song, "Name Tag".

Discography Extended plays Title Album details Peak chart positions Sales KOR 1/4Released: August 11, 2015 Label: Grandline Entertainment, LOEN Entertainment Formats: CD, digital download 63

Singles Title Year Peak chart positions Sales (DL) Album KOR As lead artist "Wanna Get (Oasis Part 2)" 2014 — rowspan="11" rowspan="2" "Sloth" (나무늘보) — "Audi" (아우디) 2015 — 1/4 "Drinks Up" — "Hangover" — "Pilot" — "School Uniform" (복학생) — rowspan="5" "Commitment" (몰입) — "Memento" 2016 — "17" 2017 — "Businessman In The City" (한강이 바다라면) — "Birthday" 45KOR: 56,414Cumulative sales of "Birthday": Show Me the Money 6"MAMA 2" feat. ALEPH skyminhyuk2021— Collaborations "Turtle Ship" (거북선) 2015 4KOR: 813,526 Show Me the Money 4 "Life Is A Gamble" (도박) 2017 19KOR: 201,301Cumulative sales of "Life Is A Gamble": Show Me the Money 6 "17" Remix — "—" denotes releases that did not chart.

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