There are nonconsentual scenes in American films as well and a popular fetish type involving faux nonconsentual pornography alive and well in the Western world. American fangirls seem obsessed with rape-comfort/hurt-comfort fanfic (raping everyone from Harry Potter to Captain Kirk)...
I just read an arc of "THE AUTHORITY" in which a villain viciously rapes one of the heroes and gets his comuppance through a gigantic drill to the back-door in return.
"The Kite Runner"'s young stars had to be given politial asylum from Afganistan because an American film chose to show the two young boys being gang-raped on screen, thus making them fair game for anti-homosexuality laws that would have them executed.
Are we supposed to pretend rape doesn't exist?
There is no rape in cartoons or books aimed at children. The very idea that there is is an idiotic ethnocentric rumor started to imply that the Japanese are all morally and sexually twisted (ironically, the same rumor holds that all anime and manga is pornographic and aimed at kids). There is rape in soap operas and mainstream anime for adults only in a suggested form to create a dramatic situation based on a real-world issue.
There is rape pornography... but there is just as much in the Western world (if not more).
The Japanese certainly have issues with reluctance as a fetish type and there are some disturbing trends in the sort of bedroom fetishes and conversations they seem to favor: but these can be just as easily tied to modern gender dynamics and men feeling feminized in a demanding workplace as they can a passion for violating women.
In the future, don't think Encyclopedia Dramatica is a viable resource for anything.