Films that take the audience inside Japan's huge and diverse porn industry have been appearing for decades. In the 1991 "Skinless Night," Rokuro Mochizuki told a semi-autobiographical story about a porn director's desperation to escape the business (an aim that the widely praised film helped Mochizuki himself achieve). Last year, former pinku eiga (softcore adult film) director Ryuichi Hiroki featured a segment about a porn shoot in "Kabukicho Love Hotel," referencing his own experiences.