Hokkaido and Okinawa are more discriminated against. Why?

Hokkaido, a native of Anouilh, is said to be relatively tall, culturally backward, in a relatively primitive state, and possibly of European descent. Okinawa, originally Ryukyu, is not a country with Japan, but a vassal state of China, and has been blocked in China. The level of civilization is also higher than that of Japan, which annexed Ryukyu while China declined. Ryukyu turned to the government of China for help. Unfortunately, the Manchu government did all the work and had no time to manage it. As a result, Ryukyu was annexed by Japan.