Kobayashi was born on October 20, 1981 in Kanagawa Prefecture. Her father was photographer and her mother was a piano teacher. From a very young age, Kobayashi learned to play the piano. When she was 13 years old she joined a brass band and started to play the flute, Four years later she stopped playing in the band and began playing the saxophone. After that she turned to jazz
After four years having learned from Bob Zangu how to play the jazz saxophone she entered the Senzoku College of Music. After graduating, she got a contract with label Victor Entertainment and her first album Solar appeared.
Official Website: http://kaorikobayashi.com/