Hey, Mr. Fence--I, at least, am not thinking with my wang. (Properly it'd be "thinking with my vag", since I'm a woman) It's not "oh noez, no more porn!" I'm worried about, it's the stifling of creativity.
The law's wording is so vague that anything could be blocked by it, and some publishers won't know until they're humiliated publicly. (And, honestly, doesn't this seem more characteristic of China or North Korea?) I don't think even the Comics Code Authority stooped to such lows.
Oh, and Ishihara? I hear he wrote a book that contains [twin slasher] AND LOTS OF IT, and quite possibly glorifies that act of violence--two things not allowed under the ban. The man is a [tornado fang]ing hypocrite, and he most likely wrote this thing not because hentai/borderline-hentai was being distributed to minors (or some moral-panic crap like that), but because he hates otaku, homosexuals, foreigners, manga-ka, and anyone else not voting for him.