The Tales series doesn't sell well in Japan either. Not just the Vita titles. The Vita titles just sold really poorly. They'd sell way more in the US, that's for sure.Other stuff
I'm going to tell you right now that VGC has abysmal JRPG tracking. Every single one of those games are overtracked for regions outside of Japan.
Actual US numbers are ~140k for Dawn of the New World, ~146k for Vesperia, and ~70k for Graces F. Numbers from NPD.