Right; I wouldn't call them "Japanese ancestors". The Okinawans of today are descended mostly from migrants from the mainland, and even these people are not ne

Right; I wouldn't call them "Japanese ancestors". The Okinawans of today are descended mostly from migrants from the mainland, and even these people are not necessarily the same ones who came to the islands from Taiwan many millennia ago. (Those underwater ruins that Yonaguni is famous for almost certainly stem from those people and not from today's Okinawans. While some of them look like a city of some kind, it is just as plausible that rock was cut out of the ground to build things. I would love to know the truth behind that amazing place!)