D-Unit is a South Korean pop/hip-hop girl group formed under D-Business Entertainment. They debuted in August 2012 with the album "Welcome to Business". D-unit has been set up so that there are two permanent members (Ram & Zin) and an additional third member (Ujin) that is set to change with every album, although Ujin has participated in an album and an additional single already. In February 2013, it was announced that a fourth member would join and no-one would be leaving. In March this new member turned out to be Janey (stylized Jney) of GP Basic fame.