Sukeban Deka [Anime OVA Series] (1991)

Synopsis
Saki Asamiya is as bad as bad girls come; she's doing time in a juvenile correctional facility and her mother is on death row. But when the police need an undercover agent to investigate the mysterious deaths in Saki's old high school, she has a chance to redeem herself and her mother. Armed with a deadly weapon that looks like an ordinary yo-yo, Saki has everything it takes to clean up her school, and her reputation. Saki is widely believed to have been the partial inspiration for the character of Go Go Yubari in Kill Bill Vol. 1. Sukeban Deka originally aired as a live-action television show in Japan before it was spun off into a two part OVA release. This is part one. ~ Cammila Albertson, All Movie Guide