坂井泉水
In 1991, Sakai joined the five-member pop group Zard as lead vocalist. The group name did not have any particular meaning except Sakai felt that word Zard sounded like a rock group. She also took the name as derived from words such as "blizzard" and "wizard." The group's name very quickly became synonymous with Sakai herself, and Sakai wrote the lyrics to all of Zard's songs except Onna de Itai and Koionna no Yuuutsu, both of which were written by Daria Kawashima. By 1993, the four male band members left the group but Sakai chose to keep the Zard name throughout her career. Izumi Sakai was Zard's sole member at the time of the band's debut, although between late 1991 and early 1993 four other members were introduced.