> Has there been any investigation of similarities between west coast indigenous languages and Asian languages, esp. Japanese? Yes, plenty, and no similarities

> Has there been any investigation of similarities between west coast indigenous languages and Asian languages, esp. Japanese? Yes, plenty, and no similarities have been found in reputable scholarship. (Note that when Gavin Menzies, the crackpot historian whose claim is that the Chinese explored the whole world pre-Columbus, stated that West Coast indigenous languages bear a resemblance to Chinese, he had to base himself on 19th-century conjectures that were pre-scientific and now totally discredited. Nancy Yaw Davis’s theory that the Zuni people of North America are related to the Japanese, is also not taken seriously by any historical linguist). The Japanese language itself only entered Japan in the last centuries BC/first centuries AD. Japanese is originally from the Asian continent and displaced whatever languages were spoken on the Japanese isles before. So, that’s only a few centuries when Japanese speakers could have somehow come into contact with Native Americans, and there doesn’t seem to be any firm evidence for it.