Why do you say Mt.Gox charges $10? I wish they had a flat trade fee for larger orders, but they actually charge a flat % of the total value of the order.
That is what they state on their website. They say to do a wire transfer their bank charges 1000 yen. thats about $10. Also on top of that there is a 3.99% charge.
I see, I thought you were talking about the trade fees. If you use Dwolla, it is close to free to transfer the money, then you just pay trade fees. However, I'm not sure if Dwolla accepts yen.