Samurai Assassin (侍, Samurai ) is a 1965 Japanese movie directed by Kihachi Okamoto and starring Toshiro Mifune, Koshiro Matsumoto, Yunosuke Ito, and Michiyo Aratama.Samurai Assassin is set in 1860, immediately before the Meiji Restoration changed Japanese society forever by doing away with the castes in society and reducing the position of the samurai class.The film tells the story of Niiro Tsurichiyo (Mifune) as the illegitimate son of a powerful nobleman, and the way of his life that made him a swordfighter but also a social outcast.