She debuted as a musician in 2004 under the label Columbia Music Entertainment, releasing ten albums with the company.

In 2013, Kimura released Rock, an album of English language covers under her private label Ela Music.

Kimura was originally a member of the band Amino before making her solo debut.

Two of the band's songs are present on the 2005 compilation album ... of Newtypes.

Her most commercially successful singles are "Rirura Riruha" (2005), "Butterfly" (2009) and "Ring a Ding Dong" (2010), all of which have been certified Million by the Recording Industry Association of Japan.