Did the ancestors of the Japanese come from China?

If you and Lao Wang had a common ancestor 500 years ago, then you and Lao Wang Can can only be said to be of the same ancestry, and it is hard to say that they are seniority. You cannot rule out the possibility that Lao Wang is your elder. Do you understand what I said?

Anyway, in the history of Japan's development, there are indeed some people who immigrated from Shandong, Jiangsu, Zhejiang and other places today, so some Japanese today may be related to China people today, but they are all distant relatives.

Of course, after all, immigration is two-way, and immigration has certain rules. The common law is that immigrants often migrate from economically underdeveloped areas to economically developed areas. For example, today, inland provinces in China often migrate to the north. The same is true in ancient times. In ancient times, the Japanese archipelago was an economically underdeveloped area, while the mainland was an economically developed area. Therefore, according to the normal immigration law, there must be many Japanese immigrants coming to the mainland at that time, while there must be fewer mainland people going to Japan. So there must be a considerable number of Japanese ancestors in China today.