She started her singing career in 1999 when she was 17 years old. Her first single was "Love, Day After Tomorrow". It became a million seller. Her first album “delicious way” sold 35 million records. After graduating Ritsumeikan University in Kyoto on 2005, she has concentrated on musical activities.
She writes her own lyrics most of the times. But she does not compose (write) the music. She gets music from composers. “Cybersound” in Boston often does the arrangements.
She was influenced by Michael Jackson.