There is a potential difference in the units. The Japanese unit will likely be released in Japan a little earlier than JVC ships the first shipments to US dealers.The official US units will be QCed by JVC in the US. I think this will delay the US release until mid Feb or about 3 1/2 weeks from now. But hey, you can give up the US warranty and potentially suffer ensuing grief, hassels and delay but earn the endearing praise and acclaim of legions of AVSers by being the first in the US to review a production model. A small price for immortality.