Are Japanese and China people the same ancestor?

Chen Shou's History of the Three Kingdoms is used to thinking that the Japanese are descendants of Baiyue.

After the Tang Dynasty, especially in the Ming Dynasty, maritime transportation was more convenient, and many Japanese people immigrated to China for various reasons (business or refuge). For example, his grandfather Zheng Chenggong. At present, about 30% of Japanese people are descended from immigrants from China in the Ming Dynasty.

It is also said that Emperor Jimmu, the first Japanese emperor, may be Xu Fu. Sima Qian first recorded Xu Fu's history in Historical Records, but he did not explain where Xu Fu went across the ocean. Later generations thought it was Taiwan Province Province or Ryukyu, and some people said it was America, but most people thought it was Japanese. Xu Fudong's crossing to Japan was originally proposed by the late Zhou Dynasty and the early Shang Yi in the Five Dynasties. Said: "Japan, also known as Japan, is in the East China Sea. In the Qin Dynasty, Chui Fu stopped at the country with 500 men and 500 women, and today's figures are only Chang 'an. ..... There is also a mountain called Mount Fuji or Penglai in Ganying in the northeast ... Fulai Xu is called Penglai, and all descendants are called Qin. "Yi Chu said that this sentence came from Hiroshi, a Japanese monk. Ouyang Xiu, a writer and historian in the Song Dynasty, also thought that Xu Fudong had spent the day in Japan. At the beginning of the Ming Dynasty, a Japanese monk went to Nanjing and presented Ming Taizu with a poem entitled "Xufu Temple in front of a wild bear". Li Shuchang and Huang Qixian, diplomatic envoys to Japan in the late Qing Dynasty, paid a visit to Xu Fu's tomb and wrote poems and inscriptions. So some people think that China people are the ancestors of the Japanese, but the Japanese archipelago had human activities as early as before the Qin Dynasty. Japan also has an early history and experienced the Stone Age. Therefore, the fact remains to be verified!