What? I think you are forgetting multiracial people. But Japan treats them like an anomaly as well. They are just obsessed like the rest of the world with pale skin
What multiracial people you are talking here about? Give me please example. Japanese race are asian, white people, same thing goes with china
Only some gyaru make their skin tan, so yeah their skin looking darker but that's gyaru haha
Now if you want to talk about some exceptional of rules such as line from different race, those people called in Japan as hafu. And imagine less then 2% in whole Japan are hafu. So again, where I'm wrong? Japanese people will be never considered dark skinned.
So Oda is not racist it's you guys want to dictate your own rules to asian countries. While asia don't care about your desires, petitions etc.