Bang Yongguk, often simply known as Yongguk, Bang or Jepp Blackman, is a South Korean songwriter, rapper, singer and dancer. He is the leader and the main rapper of the South Korean group B.A.P.
In 2007, Yongguk was part of an underground hip-hop group called Soul Connection. In March 2011, he was featured in Song Jieun's Going Crazy and the single became a number one hit in South Korea. Prior to B.A.P's debut, TS Entertainment formed a sub-unit called Bang&Zelo with B.A.P member Zelo and released their single "Never Give Up" in November, 2011.