The Sword of Doom, known in Japan as , is a 1966 Japanese jidaigeki film directed by Kihachi Okamoto and starring Tatsuya Nakadai. It is based on the serial novel of the same title by Kaizan Nakazato. Plot The story follows the life of Ryunosuke Tsukue (Tatsuya Nakadai), an amoral samurai and a master swordsman with an unorthodox style. Ryunosuke is first seen when he kills an elderly Buddhist pilgrim who he finds praying for death. He appears to have no feeling. Later, he kills an opponent in self-defense in a fencing competition that was intended to be non-lethal, but became a duel after he raped his opponents wife in exchange for throwing the match and allowing her husband to win. His opponent finds out about the rape prior to the match, and is shown giving his wife a notice of divorce. His rage at Ryunosuke during the match causes him to take an illegal lunging attack after the judge proclaims a draw, and Ryunosuke, the better swordsman, parries and kills him with one stroke of his bokken. Ryunosuke flees town after killing the man, and cuts down many of the dead opponent's clansmen who attack him as he is leaving. His opponent's ex-wife asks to go along with him. Two years pass, and in order to make a living, Ryunosuke joins the Shinsengumi, a sort of semi-official police force made up of rōnin that supports the Tokugawa shogunate through murder and assassinations. Through all his interactions, whether killing a man or at home with his mistress and their baby son, Ryunosuke rarely shows any emotion. His expression is fixed in a glassy stare that suggests a quiet insanity. Eventually Ryunosuke learns that the younger brother of the man he killed in the fencing match is looking for him, intent on revenge. He plans to meet this young man and kill him, but before the duel can take place, two events occur that shake his confidence. In a botched assassination attempt, he sees another master swordsman, Shimada Toranosuke (Toshiro Mifune), in action, and for the first time he doubts that his own skill is truly unbeatable. That same night, Ryunosuke's mistress, horrified by his unremitting evil, tries to kill him in his sleep. He kills her in the gardens, to the ominous cries of their sleeping child inside the house, and flees without keeping his appointment to duel with his