well koreans are most deffenetly different looking to chinese people.... koreans have wider noses and a more "yellow" color... they sort of, except for the nose, look like japanese people. chinese people are usually "whiter" than koreans and japanese people. their noses vary in shape and most people that you see in american movies that play any asian are chinese.... that is the face that americans are used to as well as most other people in the world becuase they are in major movies where as koreans are in some extremely good movies but are hardly seen in american movies. so asians do not at all look the same. i cant describe japanese people very well, but if they dont look chinese (lighter skin usually and smaller noses) or korean (more yellow color or dark skinned and wider noses and small chin usually) then they are japanese. this is a general statement and this is how i do it but i am right about 95% of the time so i think it will work for you.