There are at least five artists by this name: 1. Primary (프라이머리), a south Korean hip-hop producer under the label, Amoeba Culture. 2. Japanese doujin music circle, led by yuiko: http://primary-yuiko.com/ 3. Primary, a band from Sydney, Australia, featuring former members of Caligula and Def FX and lead singer Connie Mitchell (now Sneaky Sound System), were an electronic-rock band with two released albums, Watching The World (2003) and This Is The Sound (1999).