In 1996, Shigekazu Otake (Drums), Tsuyoshi Kosuga (Guitar&Bass), and Takumi Kaneko (keys) met in Boston. After returning to Japan in 1999, they formed a hip hop band, Loop Junktion & released one EP and two albums.

"3" 's founding members are Taneda Natsuko on vocals and keyboards, Hamuro Tetsuyuki on percussion, Tomita Chikara on bass and Suzuki Ayako on drums.

Until their meeting they have been individually active in various events and bands.