Japanese adult movie
Japan is more sexually permissive than most of the Pacific despite its hard line on censorshop.The japanese male fantasy tends to revolve around beauty, youth and innocence in their women. This seems to strike a chord among connoisseurs who see American or European porn as somewhat lacking in these areas.
Japan has no shortage of young ladies who not only fit these criteria but are also willing to show off a little of their naughty side. Lastly, I believe Westerners are attracted to the exotic nature of Japanese Women and Japanese Av. Here we tend to stereotype Asians in general as demure, bookish, even anti-sexual in a way. To see AV is to observe a whole other side of Japanese life and that adds another dimension to the feeling of arousal. At least it does for me.