You know, I lived in Japan for quite some time and never faced any outright hatred or malice. There was a lot of awkwardness, sure. But I think a lot of this "foreign hate" comes from a lack of understanding and a "freak out" that many Japanese people have when they are confronted with foreigners. Japanese Pride might sound like an outdated concet but it is still very relevant. Many Japanese people don't want to be made a fool of in front of others, and not being able to speak the appropriate language towards a foreigner embarasses many of them. So they come off as rude or aloof towards foreigners, instead of risking being made a fool of.

I think the worse I came across was when a landlord was unsure as to whether he wanted to let me rent his apartment or not because my "foreigness" might clash with the other tenants. But I explained that I could speak Japanese and that he was under no obligation to let me stay there if he truly was uncomfortable with it, so he ended up letting me live there and we are now quite close friends.

But apart from that, I think every foreigner should just accept that sadly, not everybody is going to accept them (not just in Japan, but in EVERY country). There are still many racists out there, but the vast majority of people ARE good people who do not harbor such thoughts.