hehe i thought this before too
i saw too many japanese tourists and chinese citizens in here also i watched too much chinese,korean,japanese movies then i figured it out

well you all look same ,small-sized cute little people but ...
i think chinese has more yellow skin than others also their eyes more pulled and tiny (too sharp) than others .

japanese has whiter skins and bigger eyes than others also their eyes are are not pulled much...

koreans... well i m not sure about natural looking ones i heard most of them get plastic surgery from their eyes and faces . they look like japanese a little bit also they look sharp

both three nations have bad food tastes :D

i could tell you more but its enaugh i guess

i hope my friends and people around here wont gonna kill me :P