Ryunosuke was a destroyer angel
You people missed the whole point of the fascinating movie. Ryunosuke was the destroyer angel of God and as such was hero-like. This angel, who wields a sword of death, is a well-known myth in the Bible but also exists in other cultures such as well. This a famous old story in Japan. During the time in the movie, anarchy and lawlessness are on the rise in Japan. Ryunosuke was sent by a deity to wreak vengeance on the wrongdoers. The irony of the movie was that because Ryunosuke lived amongst people who were weak or of low character so he was thought of being evil. He was not at all “sociopathic” or “pure evil” and a knowledgeable Japanese might take offense at this idea.. He acted upon the honorable principles of the Samurai. He constantly tests people to see if they are honorable.. Each of Ryunosuke’s executions is justified. Remeber that the grandfather, Kamatari, earnestly prays to Buddha for death. Ryunosuke is used to grant him his wish. He rightly kills Bunnojo in the exhibition duel because Bunnojo, as he expressed earlier, was trying to seriously injure or kill Ryunosuke . Ryunosuke would never give away a match because he his true to the code of Samurai which forbids such action. Ohama cheats on her husband and did not deserve any justice by the code. Later she is justifiably killed by Ryunosuke because she tries to kill him. If you pay attention to the movie all the swordsman he kills are planning murders of others or are trying to kill him first. He does not try to kill Shimada when he had a chance because Shimada did nothing wrong or dishonorable by defending himself. Hyoma was fortunate he did not meet up with Ryunosuke, since his revenge motive was unjust. At the end Ryunosuke is troubled, not by his killings, by the amount of evil people that he has encountered.
Compare this film to Eastwood’s “Unforgiven” which has a similar theme. By the way, the rushed ending and skipped episode in the movie was due to the director’s inability to fit in all the material of the story into the normal time length. He expected to make a part 2 and part 3 but never was able to do it.