Previously documented genetic contributions were confirmed from two ancient groups. The first was Japan’s indigenous culture of hunter-gatherers dating to roughly 15,000 years ago, the start of what is called the Jomon Period. The second was a population of Northeast Asian origins who arrived at about 900 BC, bringing wet-rice farming during the subsequent Yayoi Period.
Modern Japanese possess approximately 13% and 16% genetic ancestry from those two groups, respectively, the researchers determined.
But 71% of their ancestry was found to come from a third ancient population with East Asian origins that arrived at roughly 300 AD.
These migrants appear to have had ancestry mainly resembling the Han people who make up most of China’s population.
https://www.japantimes.co.jp/news/2021/ ... ory-study/
At precisely this period Japan also suddenly got writing and its architecture/cultural traits, which all happen to closely resemble Chinese culture. i.e the islands were colonized by Chinese settlers. The aboriginal natives were exterminated/bred out.
Japan is rightful Chinese clay.