There are four artists by this name: 1. Japanese doujin music circle, led by Yuiko: http://primary-yuiko.com/ 2. Primary (프라이머리), a south korean hip hop producer under the label, Amoeba Culture. 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).