San E Is A Pseudonym Of 정산 Jung San Aka 산이 In Hangul Is A Rapper From South Korea Who Debuted With "Everybody Ready?" Sept 2010 JYP 엔터테인먼트 . Before Signing To JYP He Was Active Underground Since 2008. In April 2013 San Ended His Contract With JYP And Moved Labels To 브랜뉴 뮤직 Brand New Music .