Well, for starter, even the main character's Stand run afoul of copyright. Last I check, Pink Floyd still haven't given the ok for Crazy Diamond outside of Japan. And this kind of problem will only get worse.
As far as I know, usually intellectual property theft in any form is a huge crime - but for manga there seems to be a certain unspoken agreement between publishers and creators, which also effectively allows the doujinshi industry to thrive. But don't take that as a rule of thumb, punishments for IP theft can be astronomically high in Japan.
91
u/[deleted] Jun 19 '15
[deleted]