you can just email fabfour and buy it from them via paypal... shipping is 20 extra, so it adds up to like 240 or so
At current exchange rates, Skulls retail for slightly over $250 in Japan right now. If shipping is $20 extra, that brings it to over $270. If FabFour sends you an invoice for an order, I would guess that it will be in Japanese yen, so you will pay additional, because you will either pay a currency exchange fee to your credit card, or PayPal will give you a worse exchange rate so they can profit off of the currency exchange.
Self Edge sells Skulls for $290. When all is said and done, you won't be saving that much even if you order from Japan. Plus, you won't be able to do an exchange with Japanese stores if you have any fit problems or anything like that.