Princess Nine (full name, Princess Nine Kisaragi Joshi Kou Yakyuu-Bu) is a 26-episode Japanese anime broadcast in Japan in 1998. The television series was produced by ADV Films in North America, aired from April 8-October 14, 1998, ran for 26 episodes, and 6 volumes of videos were released on VHS and DVD.

The story concerns the trials of nine girls at the Kisaragi School for Girls who form a baseball team for the purpose of playing on equal footing with boys' teams at the most prestigious high school tournament in Japan at Koshien Stadium. They are led by ace pitcher, Ryo Hayakawa, daughter of a former rising pitching star in Japan.

- From Wikipedia