Yes exactly. To (some) westerners, Asians may appear as one group (to put it "nicely") but the Japanese, when racist, are very likely to be more racist against Chinese or Koreans, than black or white folk, who they have much less cultural baggage with. I'm going to stop there, though, because while these are my observations, I'm really an outsider on the whole thing. This is also probably not the place for it.
On the topic of the thread, I wish more of us were like the Japanese when it comes to caring about our place in our community, and our responsibilities to our fellow citizens. You're not going to see anti-vax/racist truck rally/protests there, that's for sure.