It's the fact that if it were a western nation that held such sentiments, they would be accused of beimg radical and racist.
Thats because Europe isnt Asia. Different parts of the world actually have a different history and culture.
I know, amazing!
Again Japan(for example) was a highly isolated country. There simply were no foreigners to harass. And this never really changed. Its a homogeneous country for one people.
They are also racist towards eachother. Especially those barbarians in Kyushu.
And they were especially racist towards the Ainu. You know thats actually something to talk about. But then again its a historical problem.
Apart from that i just dont see the problem. There have never been vast numbers of foreigners in Japan apart from the US soldiers.
So the Japanese are racist towards people that arent even within their reach.
And most people they are racist towards are actually also racist towards them. So who is hurt? No one.