The other day I was browsing YouTube and I ran across this:
http://www.youtube.com/watch?v=i8VPp-DPCk8
Reading into this particular video a bit further over the Wikipedia entry [http://en.wikipedia.org/wiki/Kodomo_no_jikan], apparently it's not really supposed to be about underage sexuality, it apparently turns into a Soap Opera (as many Japanese Anime are) about the resulting difficulties coming from this girl's crush (with oddly sexual overtones) and the instructor's difficulty in dealing with it because of a sheltered past.
When Seven Seas, the Western distributor, got their hands on it they renamed it "Nymphet." Unsurprisingly, no western Publisher was willing to handle it at that point, even though it apparently isn't intended to extol underage relationships as much as it would seem by first glance so much as to play off the sexual tension that results in the ridiculousness of a situation caused by a minor being so bold.
It's enough to blow the minds of a lot of Westerners to see that this was played over TokyoTV. However, it was delayed a bit because of a recent vice-principle being busted on child porn (which made national news) and then re-released in a slightly more censored form.
Bottom line: Culture shock is tricky business, Japan isn't into kid porn as much as many Westerners think, and our kneejerk reactions about it often work to leverage justification that was never there. Whoever got their hands on this series and renamed it "Nymphet" was clearly mongering to an audience even Japan would be hesitant to. Your average 4Chan kid who brags for "fapping" over this would probably be considered as much a freak there as here, but he can find a niche if you say (incorrectly) that kind of behavior is acceptable in Japan.
An Iowa judge getting upset about a fellow's Yaoi collection enough to send him to 20 years of prison would make more sense if there were demonstrated intent by the defendant to act on the collection. The differentiating factor between possession of cartoon-form pornographic materials relating to the act and the desire to commit the act itself is a tough one to determine without greater investigation. (The dividing line of actual (non-cartoon) form of pornographic materials is not there because real harm was done to minors in its making and possession (or possible purchase/production) of it is forwarding that agenda.) If a brief investigation revealed he was accosting little boys in his neighborhood, there wouldn't be any debate about it, maybe some would even say that 20 years is too short.