The society is based so strongly on group cohesion and de-emphasis of the individual, the experience of living there is very, very different than the West.
I think that this "deep cultural difference" is what the original comment was trying to get at. Sadly the reference point of "American South" ended up triggering a different (less useful) trajectory for the responses.
https://en.wikipedia.org/wiki/Chichibu_incident)
The following may help--- if you think of Othello as a kind of ideal southern gentleman, as the Japanese sort of did
https://www.semanticscholar.org/paper/Othello-in-Tokyo%3A-Pe...
Now a Alt-Dixie readaptation of that adaptation must of course be the story of https://en.wikipedia.org/wiki/Nathan_Bedford_Forrest
(Taiwanese would be negroes loyal to the Cause, and Ainu would be the native Americans)
It actually makes it harder to tackle the discrimination, since it's not openly admitted. Glass walls and ceiling.
(Recommended read: https://en.wikipedia.org/wiki/Burakumin
'There is a "virtual taboo" in the Japanese media against discussing the topic, leading to widespread public ignorance.')