This isn't a fundamentally Japanese issue, Grom. This is a universal issue concerning the decency of mankind. Human depravity is still depravity be it Nippon or Timbuktu. Condoning acceptance of rape and torture will only further desensitize our inhibitions against debauchery. For good or for ill, this is what happened to homosexuality. Now, I'm in no way saying that homosexuality is immoral, but, it was considered to be such yesteryear. But given the mainstream acceptance it acquired by the mass media over the last generation, it became socially kosher. Rape and torture, however, are not like homosexuality. Rape and torture are inherently vile and affront to all decency. However, the desensitizing effect of mass media makes no such distinction, and it will eventually create indifference if not tacit assent to these intolerant practices. By your own admission, it's already happened in Japan. Unfortunately, tolerance of intolerance is no tolerance at all.
I may be wrong, but are you comparing societies growing acceptance of relationships between consenting individuals as a sign that society will accept nonconsentual relationships?
I can't tell, but are you also arguing that some acts in video games will "desensitize our inhibitions against debauchery" but not others? Because if you're going to argue that "rape and torture" are desensitizing, then surely the same argument applies to any game with violence in it as well (which pretty much rules out any game that has physical conflict between entities).
Or am I missing something?
You're right Amentep, in that if you take that principle to its logical extreme it could, in theory, rule out a great many things. But that's in theory. In reality, violence in an of itself is not comparable to rape or torture. Violence may be a part of self-defense. Violence may be part of justice. Violence is always part of war. But these things are subject to justification. They can, a great many times, have a moral leg to stand on. Rape, torture, and pedophilia is without justification, and that's what makes it intrinsically debase. As legal scholars call it, it's the distiction between a malum in se (wrong because it's inherent wrong), versus a malum prohibitum (wrong because the law says so). This is exacerbated by the fact that most of us are either indifferent to or enthusiastic of gratuitously violent media, and so corrective action would likely be futile. The cat's already out of the bag and the desensitization has already taken place.
But as RPGmasterBoo eloquently said, "at some point you simply have to draw the line." Thankfully, American and European society hasn't sunk (yet) to those depths of nonchalance with respect to rape, torture, & pedophilia. Hence, the current public outrage. We still hold some things sacred it seems. But if we continue down the path Japan have walked, then it won't be long before there's hentai on Cartoon Network or rape games on the shelves of Gamestop.