Teruo Ishii (????, Ishii Teruo, January 1, 1924 – August 12, 2005) was a Japanese film director best known in the West for his early films in the Super Giant series, and for his films in the Ero guro ("erotic-grotesque") subgenre of pinku eiga such as Shogun's Joys of Torture (1968).
He also directed the 1965 film, Abashiri Prison, which helped to make Ken Takakura a major star in Japan.
Referred to in Japan as "The King of Cult", Ishii had a much more prolific and eclectic career than was generally known in the West during his lifetime.