In the late 1960s, Nikkatsu began having severe financial trouble due to audiences lost to television and an influx of Western films. In order to avoid bankruptcy, Takashi Itamochi, president of Nikkatsu, made the decision to put the company's high production values and professional talent into the adult, or pink film industry as a way of attracting a new audience. Nikkatsu called its line of pink films "Roman Porno", and started the series in November 1971. Rather than work in sex films, many directors left the studio at this time, opening up positions for younger directors in their wake. Tanaka remembers his attitude about Nikkatsu's decision, "I was excited and positive about the changes, and was very eager to work in this new genre as a director."
