I'm half-Japanese, half-Korean. I've had people point me out as Japanese before, but I can't recally someone pointing me out as Korean. Also, I get just slightly annoyed if someone knows my last name is "Nakamura" and ask, "oh, which side is Japanese?"
Think a little bit thar eh? Though I suppose maybe if you don't know Nakamura is a Japanese name... (Or I could be just biased against the fact that it obviously is no matter how you hear it. Maybe.)
I do embrace my Japanese side much more though. TV-wise, class-wise, surroundingness-wise, food-wise... yum.