Skies of Arcadia © Sega/Overworks, as far as I can tell.
Used this and Google Imagesearch for references.
(Edit - Jan 3rd 2014) So apparently this is now on the first page of popular results for SoA? Nice.
I'm fine with it. I just copied 'em from the game, really, so as far as I'm concerned Sega's who you should be asking.
I'd guess they're not too bothered by people getting magic moon tattoos either, though.
Would you mind if I used parts of the symbols in a poster I am making for Skies of Arcadia? I'm reworking the world map to be a high res file.