Information:
SONOMI played the piano and clarinet since she was very young, due to her father being a music teacher, and she began head of the brass band club in Junior High. After graduating she joined the Aomori Full Volume Crew as a vocalist. They held many live events in the Aomori area.

In 2000 she relocated to Tokyo. She became active in the underground scene there, where she met ex-Kick the Can Crew rapper and solo artist KREVA. In 2004 she guested on KREVA'S "hitori janai no yo" single, and even toured with him as a guest.

In 2005 she debuted with her solo interpretation of "hitori janai no yo" on KREVA's label "Krebel". She also released other singles afterward that were produced by KREVA himself.