Sony Mobile Japan has rolled out an update for the Xperia Tablet Z (SO-03E) that brings Full-Seg digital TV support. The move from One-Seg to Full-Seg means NTT DoCoMo users can benefit from high definition broadcasts. The new firmware updates the build to version number 10.1.E.0.305 with Android remaining at 4.1.2 Jelly Bean. For more information click here.
Thanks @dukarriope!