I was pretty excited when I found out they do ship overseas, but then when I was making some purchases, the shipping was 746 yen (i think), so that was cool.
Then after the purchase, I learned that it turns out that that was just shipping TO Japan and because I said I was from the US while creating my account, I got an email from a staff member saying that the overseas shipping was much higher - in fact it was 5000 yen (~50 USD) for shipping in North America, 5100 yen (~51 USD) in Europe. Ridiculous. Even more so that they had to email me instead of the actual cost actually being displayed on the receipt during checkout. Of course I had to cancel my order.
I highly suggest using a shopping service instead, like FromJapan or ShoppingMallJapan.