YU-KI is a member of the band debuted as TRF in the year 1993. During the period of 1994 to 1995, the band released 5 singles produced by Tetsuya Komuro, each selling over a million copies under the Avex record label. In 1995, their song Overnight Sensation ~Jidai wa Anata ni Yudaneteru~ received a Japan Record Award. YU-KI has also done voice acting for a children's animation movie Elmer's Adventure: My Father's Dragon, for which she sang the opening theme song as well. She is well known for singing NEXT LEVEL, the opening theme of Kamen Rider Kabuto.