Why there isn't much Asian-related Academia in the United States, or Asia for that matter...

There's a story there, not many people in America are aware of. There's a reason Asia does not have much official academia of the arts (martial, filmmaking, or animation) in America or Asia.

It has to do with secrets and tradition.

In Asia, knowledge is considered Sacred and Mystical, in much of the past, and still to the present, not much if any of the top knowledge of Asia was meant to be taught to dirty heathens, foreigners, or outsiders.

Asians teaching Asian academics in American fields is rare, precisely because that form of "knowledge sharing", historically speaking, was considered taboo in China and Japan. Teachers and Teaching of the mystical, martial, and technical variety are considered VERY taboo to historical Asian culture. It wasn't until Bruce Lee and a few others (in the field of martial arts especially) BROKE the taboo, and taught westerners what was previously "secret techniques" and "sacred knowledge"