Originally titled "Geki Totsu: The Insanity of Emperor Iemitsu Gekitosu", "Shogun's Shadow" is a non-stop action film featuring Kyokushinkai master Sonny Chiba. This film is based on the true story of a shogun who sends his army, led by an assassin (played by Chiba), to kill his eldest son and make way for his younger son to be the next shogun.