Shogun's Samurai, known in Japan as The Yagyu Clan Conspiracy , is a 1978 Japanese historical martial arts period film directed and co-written by Kinji Fukasaku. The film is the first of two unrelated Fukasaku films to star Shinichi "Sonny" Chiba as Jūbei Mitsuyoshi Yagyū, the other being Samurai Reincarnation.

Kinji Fukasaku was a Japanese film director and screenwriter. Known for his "broad range and innovative filmmaking", Fukasaku worked in many different genres and styles, but was best known for his gritty yakuza films, typified by the Battles Without Honor and Humanity series (1973–1976). According to the Berkeley Art Museum and Pacific Film Archive, "his turbulent energy and at times extreme violence express a cynical critique of social conditions and genuine sympathy for those left out of Japan's postwar prosperity." He used a cinema verite-inspired shaky camera technique in many of his films from the early 1970s.