To be fair, a lot of Koreans are cunts, and the Chinese are like the Mexican immigrants of Japan- useless in China, useless in Japan, and are disrespectful. Hong Kong people are also kind of bad, because they have awful business practices.
If you ever have been to a Chinatown or a Korean community you know why I say this. They act and live like Appalatia hicks but think they are so much better than everyone else. The recent trip I made to Porter Square, the ramen shop was spotless while the Korean sushi bar looked like a back alley abortion clinic. I guess the Japanese are better with aesthetics and functionality than the Chinese or Koreans.
Also the shops in Chinatown with the ROC flag are usually the best to go to. They don't overcharge and the food is usually the best made.
Japanese communities are hard to find, though, since they usually know what it is like to have an ethnic community refuse to assimilate, and avoid doing it.
Taiwanese/ ROC Chinese, I like a lot. Not sure what the Net Uyo think though. Never met an ROC Chinese who wasn't really nice or awesome.