(Keep in mind I'm not positive that Say Hello to Black Jack is blocked but considering the below it seems highly likely.)
Kodansha recently had 30% of their manga denied by Apple for the following reasons:
Anything with not only violence but blood (be it even a medical manga where a person is sick and spits up blood) was taken out. So let's apply this to other manga... Naruto? Gone... Bleach? Gone... ONE PIECE?! Yep... Gone.
2) Adult Situations
While this I can understand. Having a boob accidentally pop out or anything else that goes past a "safe point" (don't ask me what that is) is banned for being porn.
When Kodansha was asked about why they were banned, they replied "Ask Apple". When Apple Japan was asked how they'll define "violence" and "Adult situations" they replied "We can't comment". They also refused to comment on why Japanese manga being sold in book stores around Japan was banned as well.
How "Adult situations" and "Violence" is to be handled outside of Japan still remains uncertain. But for Japan, it doesn't look very bright.
Apple, having recently stated "If you want porn buy an Android
" has really kicked it up a notch this time. By pretty much saying if you want to read any popular manga you'll have to buy an Android.
Well good thing Android is on their way
to creating their "iPad killer". So there is still hope for fans out there that would love to pay for the ease of reading official manga.
So- who all out there is wanting an Android based tablet? :D.Source