She would've had exaggerated lips, talked jive and offended us...trust me, it's better this way.
Not many women walking around with natural blue hair either......because it's a fukkING CARTOON. It is not reality nor ANY type of representation of the real world, it is an entirely made up animated fantasy world where the rules of real life do not have to apply. Are we gonna start questioning how Sayains were able to breathe in space? NO, they just can because they can, it's not important. The only thing that is important is that once rules are established in a manga/anime/show that it abides by those rules from then on to avoid unnecessary confusion.
If a manga/anime/show/etc wants to be in a universe closely related to our own to appear more relatable, it can. If it doesn't, it does not have to. That includes all rules of physics, science, race, age, religion, strength, speed, etc etc etc
I'd disagree that the majority of Japanese "worship" the white man. Don't let fleeing images fool you to believe it represents the heart and soul of all the Japanese people. Asians are very proud of who they are, and honestly, most Americans in their anime are depicted as very nasty and disrespectful individuals.
But back on topic......all of them are Japanese, not just Mars because she's wearing a fukking kimono