Just a thought - is there a Japanese keyboard enthusiast in this keyboard who are used to GB who will do it for the team? Cough, hasu, cough?
Edit to say that I have just verified with amazon.co.jp as well and it's the same price as getting from PFU direct. Except PFU gives you a wrist rest and potentially some key caps kit. Which is a great deal too. But for me, who is in Asia, and therefore can't join this group buy, it may be better to get from amazon.co.jp as I can use tenso.com as the proxy. I'll have to forego the wrist rest though, which looked really good.