Princess Nine, or Princess Nine Kisaragi Girls High Baseball Club (プリンセスナイン如月女子高野球部, Purinsesu Nain Kisaragi Joshikō Yakyū-bu?), is a 26-episode Japanese anime broadcast in Japan in 1998. The television series was produced by Phoenix Entertainment in Japan, released by ADV Films in North America, aired from April 8 to October 14, 1998 on NHK, ran for 26 episodes, and six volumes of the series were released on VHS and DVD. The show is listed at Animeondvd.com as a recommended series.
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, The National High School Baseball Championship. Their aim to qualify for, and ultimately to champion, the final rounds of the tournament which is held each year at the Koshien Stadium. They are led by ace pitcher, Ryo Hayakawa, a daughter of a former rising pitching star in Japan.