I think alot of confusion could be avoided if we distinguish between the type of Japanese, and use precise language..i.e. Yayoi-Japanese. Just as people distinguish between Malay-Indonesians and Chinese-Indonesians. I also observed here that people referring to the Han Chinese as though they are of uniform ethnicity. But the 'Han' Chineses truly homogeneous people? People from different parts of China seem to have distinguishing features. Further, the Chinese migrants in S-E asian countries, Hong Kong and Taiwan also look somewhat different from the majority of the mainland's regions from my personal experience, but that's going out of topic.