Apr 2, 2016
Has Tergaia's Japan opened up to the outside world?
Yes and no.
Outside countries are limited to where they can land/trade in Kyohon, and even then there are very few nations that are given free roam outside of those port cities.
On the other hand, Kyohon has traveled and traded to other countries and there are Kyohonese* people living in said countries.
*Only avoiding outright calling them Kyojin because of AoT