"The Sword of Doom" is a Japanese film released in 1966, directed by Kihachi Okamoto. It is a samurai movie that follows the story of Ryunosuke, a skilled but morally conflicted swordsman. The film explores themes of violence, honor, and the psychological effects of a life spent in conflict. The narrative centers around Ryunosuke's encounters with various characters, including Kozue, who represents a potential path to redemption. As he navigates his violent existence, the film delves into the consequences of his actions, ultimately leading to a tragic and thought-provoking conclusion.