Jubei-chan the Ninja Girl: Secret of the Lovely Eyepatch(1999)

Juubei-chan: Lovely Gantai no Himitsu

Improbable as it sounds, perky junior high student Jiyu "Jubei" Nanohana is the reincarnation of the legendary samurai Yagyu Jubei. When she puts on the fabled Lovely Eye Patch, she becomes a devastating swordswoman and assumes all related responsibilities - including a 300-year-old vendetta with the Ryujoji clan.

(Source: Media Blasters)