Karate Girl (KG カラテガール) is a 2011 Japanese martial arts film directed by Yoshikatsu Kimura starring Rina Takeda.

As children, they live a happy life with their father (Tatsuya Naka) who encourages them to practice karate.

However, one day a mysterious group invades his dojo - killing his father, kidnapping Natsuki and stealing the black belt that was worn on his family for more than 200 years.

Several years later, Ayaka is living the humble life as an ordinary high school student in Yokohama.

Out of love for her sister and with her father's teachings still in her heart, Ayaka decides to do whatever it takes to get Natsuki and her family's black belt back from the clutches of the mysterious group.