One day billion of otaku will be put in jail because there isn’t a single manga/anime fan who hasn’t loli material on his computer or on a DVD/manga, …
You watched strike witches, chu bra, kiss x sis ? Now you’re a pedo.
There’s a legal requirement for sexual explicitness. Fanservice doesn’t cut it. In addition, I suspect the bar for obscenity is set rather high “age-wise” (or low, depending on how you look at it :P).
Does not apply. There is a universal constant that defines twincest can never be obscene, but instead is divine. That link is NSFW… but worth getting fired over if you’re caught. 8)
As far i know, there’s even worse cases than that. 
Anyway, if you ask me, all the eroge girls in the 3rd highschool grade are 18 y.o. The 1st and 2nd graders are 18 y.o. too minus 1 or 2 years :lol: . It’s better this way, to avoid problems.
I remember not long ago we had a discussion about how young some girls can look, even if we considerate they are 18 y.o. or older.