Zatoichi's Vengeance (1966)

Zatoichi makes friends with a dangerous chess player, while fending off angry yakuza and bloodthirsty relatives out for revenge, and trying to save a sick child. Meanwhile, his luck with dice is turning.

Zatoichi is a blind massage therapist and swordsman who finds out that something troubling is taking place on the outskirts of town. After discovering who the guilty parties are -- an accomplished Chinese martial artist named Wang Kang and his youthful attendant -- Zatoichi finds them and discovers that the pair's mixed up with a dangerous bunch of terrorist samurai who murdered the boy's parents. Now, Zatoichi must step in to save the day.

Blind swordsman Zatoichi, jailed briefly, is implored by another prisoner to aid him in proving his innocence of a crime for which he is sentenced to death. Zatoichi is reluctant to get involved, because he knows how often such involvement has led to trouble in the past. But events conspire to thrust him repeatedly into involvement, and gradually he comes to believe in the man's innocence and determines to free him.

Zatoichi comes upon the town of Tonda, overrun by gangsters. Using one of his favorite techniques, Zatoichi proceeds to win 8 ryo in a rigged gambling game. Of course, the local gangsters attempt to kill him, and the adventure begins. It turns out a blacksmith named Senzo examines Zatoichi's cane sword, and discovers it to be forged by his old mentor. Senzo discovers the sword is at the end of its usefulness and will break when it is used next.

Zatoichi is forced to kill a young man who owes a debt to a yakuza boss. Moments later, his sister Osode arrives with the money she earned (prostituting herself) to pay his debts. The bosses true motives are revealed and he attempts to steal Osode even though the debt is paid. Zatoichi realizes his grievous error and protects the girl from the gang. Osode and Zatoichi are caught in a dilemma as she must rely on her brother's killer for protection and Zatoichi wrestles with the injustice he has caused.

Wishing to find peace, Zatoichi travels to his old village but only finds trouble when he ends up in a love triangle and finds old scores have followed him home.

Itinerant masseur and master swordsman, the blind Zatoichi, is near the village of his teacher, Hikonoichi, so he decides to visit. He learns of Hikonoichi's recent robbery and murder and the imprisonment of his virginal daughter, Osayo, in a brothel. Through friendship with Denroku, a local dice thrower and devoted father, Ichi uncovers an unholy alliance between the governor and the area strongman: among their scams is falsifying tax records to put farmers in debt, then forcing their daughters into prostitution at the boss's brothel. With help from Denroku's daughter, Otsuru, Ichi comforts Osayo until he can provoke showdowns with the villains and their henchmen.

Blind swordsman/masseuse Zatoichi befriends a young woman looking for her father, a village leader who has disappeared. As he helps her investigate the disappearance, Zatoichi also becomes involved with another young woman who is trying to help her brother, who has murdered someone at about the same time and place as the missing man was last seen.

When a local gambling house kidnaps some peasants because they failed to pay their debts, a rival gambling house pays their debts and sets them free.

Returning to the village where a year before he had killed Hirate, a much-admired opponent, Zatoichi encounters another swordsman and former rival in love.