The majority of mid sized JP studios don't know how to make HD games
It's simple as that
People seems to forget that gaming development is still an IT job, and developers are computer scientists and software engineers. If you don't understand the tech trends because you are locked for a decade making handheld games, mobile games and visual novels you will have a hard time developing HD games, concretely making your games far less optimized and less polished than what they were supposed to be in a given platform