I think you should ask
@Lulldapull bhai this question.
Some things for sure - as I have seen personally in my visits to Japan.
Japanese are intensely private and insular people.
Lots of unwritten rules you NEVER break.
Japanese like to be quiet and keep to themselves.
Japanese won't even sit near White people on subways.
In other words, the opposite of most Dalits who are loud, boisterous, uncouth and embarrassing.
However - Japanese now need people to run machinery and factories.
They are trying to re-invent their economy.
Since Lull bhai lives there, he probably can speak to this more accurately.
I don't worry about Bangladeshis so much, they are usually meek and quiet.
I worry about Dalits especially UP and Bihari cow belt folks.