After I ordered a Sony NW-ZX1 from PriceJapan.com I mailed them to ask about the possibility for only Japanese menus and they replied:
We confirmed its English menu on Sony Exibition builiding in Ginza, Tokyo.
But, there was a note that ' this item is a tentative version. Its final version may be different from this version '
We will confirm its English menu when it is released.
If there is no English menu on final version, we will hold our shipment.
A very strait answer in my opinion.
Maybe this issue already been discussed in this tread, but I haven't had the time to read all 87 pages.
Stockholm / Sweden