Between 1970 and 1974, numerous Japanese film companies produced dozens of films in a new sub-genre which combined action, sex, violence and crime, and was dominated by ruthless and deadly delinquent females. This sub-genre is now known as "pinky violence." With such series as Girl Boss, Girls' High School Terror, and Female Prisoner: Scorpion, Toei created a cinematic world filled with nudity, sex, cat-fights, torture, rape and revenge, and peopled by very, very bad girls who stripped off their clothes as readily as they pulled out a gun or a knife. Tokyo Grindhouse contains an extensive introductory history by Jack Hunter, as well as illustrated sections on all the main pinky violence series and one-offs.