Saiyans give off absolutely zero clues that they are asian. They have no asian traits or anything aside from dark hair when they aren't in a super ssj form. One hell of a talented Jap created dragon ball sure, but he didn't model saiyans off of asians, that's for sure. We see characters that look Asian in the series, but we don't see many main characters that resemble said asians. Just pointing out the obvious since it seems like it needs doing here.