Crimson Bat, the Blind Swordswoman

Original title: めくらのお市物語 真赤な流れ鳥

A young girl named Oichi is abandoned by her mother and blinded by a lightning strike. When her guardian is killed, she learns to wield a sword from a traveling ronin. As she develops into a master swordsman, her profession becomes that of a bounty hunter. Many test her sword and many die by her skills. She travels throughout the countryside to seek her mother and her revenge.