Mai Hoshimura was born on April 18, 1981 in Matsue, Shimane. Hoshimura began to learn to play the piano at the age of four. Her mother, a teacher, had hoped she would become a classical pianist, but it was her father; also a teacher, who had influenced her with popular music. Her 2007 song "Sakura Biyori" was the tenth ending theme of the anime Bleach. Her single "Regret" was the seventh ending song of the anime D. Gray-man. Her song "Merry Go Round" was used as the fifth ending theme for the anime "Yakitate!!! Japan".