In 2000, she was approached by Nobuo Uematsu to perform the theme song for Final Fantasy IX, "Melodies of Life" and she sang for both the Japanese and the English versions of the song. The song was also released as her sixteenth single of the same name by King Records. She also performed for other Final Fantasy themes in her solo album Cross My Heart. Emiko Shiratori also wrote the lyrics for "Pure Heart", an arranged version of "Aerith's Theme" included on the B-side of the "Suteki da ne" single.