There are reports that Xperia Z Ultra comes with Japanese operator NTT DoCoMo and a leaked picture confirms it. The picture is from an official Sony Mobile blog post where some designers of the Xperia Z Ultra talked about the ideas behind its creation.
Leaked picture clearly shows a developer with a NTT DoCoMo branded Xperia Z Ultra and Sony has decided not to sell the Xperia Z Ultra in Japan.
[Via] Ameblo