Japanese singer. She debuted as a member of the popular girl group Speed in 1996. In 1998, hiro released her first solo song, "Mitsumete Itai", as a B-side to Speed's single "All My True Love". She made her official solo debut in 1999 with the single "As Time Goes By", which sold 800,000 copies in Japan. In 2022 she released her fourth studio album called "0"