Although the pink film genre has declined dramatically since the advent of AVs on VCR the genre is significant in that it paved the way for true pornography in Japan as well as for multiple other genres of Japanese pornographic film including: hamedori, roshutsu, and Japanese bondage [REF].
The medium of erotica known to the west as hentai was invented in Japan and refers to erotic manga (Japanese graphic novels) and anime (Japanese animation).