Thread:Godzillafan93/@comment-6052796-20140913230734/@comment-397235-20150107121856

Well, I would assume, if anything, Mei's eye is just a magical artifact. At most this means Kirika is a witch, but it may have skipped Mei's biological mother entirely.

Of course, because Harry Potter was written by a Brit, there's never any mention of how magic is handled in other countries, so while it's known there are Japanese wizards (the book Fantastic Creatures and Where to Find Them, upon which the next movie will be based, mentions the kappa, for instance), we have no idea how they're integrated into society.