Though her early performances in films such as Nihon Cinema's Technique of Fainting have been called "green," she still overshadowed the nominal star of the movie.
In order to attract a new audience, Toei entered the sexploitation market in 1971 with its "Pinky Violence" series.
Most actresses who moved to Nikkatsu after starring in independent pink films had to change their stage names.
[8] Nikkatsu launched its Roman Porno series in November 1971 with Apartment Wife: Affair in the Afternoon, which featured Shirakawa in the starring role.
[9] The film became a huge hit and made Shirakawa "the first mega-star of Nikkatsu's lucrative pinku eiga period in the '70s.