Samurai genre Lady Snowblood is usually one of the first you would come by, due to its huge cult following. I would say Shogun Assassin and then this one are probably the two most popular and rightfully so.
revenge. The film opens up in a female prison with a dying woman giving birth to a baby girl named Yuki. Yuki's mother was done great wrong in life and decides that Yuki will dedicate her life to vengeance. The newborns fate is already sealed. She will walk the path of revenge and kill the scum who murdered her father and raped her mother. Yuki is raised by a mean-hearted gray haired dude who teaches her to be tough. Similar to so many Hong Kong Kung Fu Films, Yuki goes through a long painful training period and many of the techniques seem quite ridiculous. Especially this one scene where she is put in a barrel and kicked down a hill. I'm not quite sure exactly what that does to train someone in martial arts but it does happen more than once in this movie. Anyway as Yuki becomes an adult she seeks out the bastards that destroyed her family and rips through them one by one with her samurai sword.