This can be a tricky question because people sometimes confuse Pinky Violence with Pinku Eiga (also known as Roman Porno). A true PV film contains little or no softcore sex scenes and focuses more on violence. They have a strong female lead(s) and often revenge is a major theme. Other popular themes are rival girl gangs clashing and prison settings. Major studio Toei led the charge in developing violent pink films and produced the vast majority of them. Toho and Nikkatsu each produced about a half dozen films during the height of the pinky violence era which was the 5 year period from 1969 to 1974. Our project is not meant to be a strictly definitive one, as there are inclusions which are not absolutely violent pink.