Were there any Japhetites (caucasians) in south east Asia or America in the IIIrd millennium BC?

I read in at least 2 or 3 references (both creationist and non creationist) there there is evidence of a small caucasian element pretty much all over the world (Americas, Pacific, East and South East Asia) since olden times besides what is commonly regarded as caucasian (Indo-Europeans). Of course, japhetites were a minority in all those places compared to the hamites. I still find it amazing that there were some. East Asians, Pacific Islanders and Native Americans would thus, in a biblical sense, be maybe 10-20 % caucasian (japhetic), the rest being hamitic and maybe a very little semitic element ( a few percent)