QUOTE(Darkmage @ Dec 6 2011, 06:42 AM)
The back looks like an image of Mt. Fuji.
I thought that too. I don't recognize the symbol, which you would think would be easy since it's pretty bold and unique, but it reminds me of a spade from a deck of cards. I would bet it's some custom symbol but I don't think that automatically makes it a Goetic sigil.