Of course you have had your experience and I have had mine, but while we're trading opinions, I have found the Japanese, on the whole, to be among the warmest and most welcoming people I have ever met.

Yes, people in Tokyo tend to be a little curt, but no more so than people in other great metropolises like New York, Paris, or London.

I have also never experienced the permanent "outsider" stigma. I feel often the complaints boil down to people not liking that they are spoken to in English when being seated at a restaurant. Well, as someone who has quite a few friends working at restaurants, it honestly just an artifact of people trying to do their jobs efficiently, not some elaborate scheme to ostracize white people.