The Japanese government is opening up, but it's gonna take some time for Japanese society to do the same. I can tell you from experience that integrating as a foreigner in Japan is...challenging.
Eh, such generalizations, I've lived and worked in very racist homogenous societies for years and still never struggled to find local friends.
There's always cool folks to befriend, unless the insinuation here is no foreigner should move to Japan until a hundred million people change their ways?
My opinion is _we_ all should change, and waiting for that to happen may take a while.