Manga is a type of Japanese art. Just 'cos you don't show an interest in it isn't an excuse for ignorance.
You can post all the links you want as long as they aren't to pirated material or otherwise stupid/innapropriate subjects.
Well, the only rules RE links are these.. Not posting links to pr0n etc is just common sense and an unwritten rule really. There are then of course the rules on spamming..