Oh, I won't worry about that. Amazon.co.jp price is so high, I won't buy it from them even if they do ship outside Japan.
I buy my BD-R from Rakuten.co.jp, who deals w/ international buyers, and they link their internal search engine to over 250 Million japanese products, including BD-R disk.
For SOny 50GB Bd-R pack of 5, it's only US$36.16, I need a lot of them, but for now, because it's only 2X, I'll just buy 10, I don't have the time to wait 1.5 hr. for a burn.
thx for the info on the panasonic, I decide to go w/ sony in the end