Also, <begin soapbox>, Japanese and Chinese people can't reliably tell

each

other apart until they open their mouths.  There is no difference in
"slopes and lines around the eyes and nose" consistent enough to use as a
distinguishing feature. <end soapbox>

Umm.....I'm Taiwanese (very similar in appearance to Chinese), and I can
tell the difference. I can't really explain how, I guess it just has
something to do with being raised with Asian people all around you, then
seeing an Asian that looks slightly different. For instance, Vietnamese
people are a slight shade darker than most Asians. Just slight little
differences. I read somewhere that other Asian groups are treated worse than
caucasian gaijin in Japan. Anyone know why? Please respond privately for
that one.