I've read everywhere that black and White guys have a foreign charm about them that makes it easier to get involved. All I've heard about Asian gaijin is that they get treated as retarded Japanese ppl who have lesser Japanese language skills or as fake gaijin if they try and play the foreigner card.
I know confidence and your own ability is important but is being an Asian gaijin actually that much of a disadvantage (only in terms of dating and picking up, not anything else like Japan racism or no gaijin stores etc)