In July 1998, Ueto (special prize winner), Nejiki (musical prize winner), Nishikawa and Fujiya were selected out of the participants of the talent agency Oscar Promotion's 7th All-Japan National Young Beauty contest to form Z-1.
They made one of their first appearances at a PR event for the Japanese dub of Pixar's "A Bug's Life".
Ueto went on to pursue a solo career, as well as becoming one of Japan's most prolific young actresses.
Nejiki debuted as a solo artist in 2004 while Fujiya enjoyed a short-lived modeling career.
In 2003, Ueto's success as a solo artist prompted Toshiba EMI to release compilation album of all the Z-1 material.