What is the ethnic composition of Japan? It is said that some people in the Tang Dynasty traveled to Japan to modify their genes. Otherwise, they are ugly. Is it true?/You don't say.

There were few immigrants in the Tang Dynasty, and the Japanese accepted a large number of immigrants from China, mainly in the late Qin Dynasty, the Han Dynasty and the Jin Dynasty. The origin of the Japanese race is a mystery, but it should be the earliest that Japan still has contact with the mainland. As for the ancients, they were all like that. They are malnourished, lead unhealthy lives and have to work often. They don't look as ugly as modern people. Not to mention Japan. Look at the old photos of those people in the Qing Dynasty and you will know how ugly they are, but the nobility should be better. Japan should do the same. The original aborigines in Japan are Ainu people, and the Japanese are mainly called Xia Yiren in Hokkaido.