If Emperor Shenmu of Japan really has his own person, then it is likely that he is a descendant of Wu Yue. The legendary Emperor Shinmu of Fuso is from Takatenbara, who landed in The Hyuga in Minami Kyushu

Japan Fragment Talk 10

If Emperor Shenwu of Fuso really had someone, then he was probably a descendant of Wu Yue.

The legendary Emperor Fuso came from Takatenbara, landed in The Hyuga of Minami-Kyushu, recuperated there for decades, and then conquered Honshu to the east.

So where will the fleet land in Minami Kyushu?

Consider the currents, the fleet of ships going out to sea in Jiangsu and Zhejiang, going east to Ryukyu, and floating along the Kuroshio to southern Kyushu – which is why the location of the Japanese tribute in the Ming Dynasty was Ningbo!

Therefore, Emperor Shenwu is likely to be a descendant of the State of Wu, and there was a lot of infighting in the State of Wu (闾闾 assassinated the Wu King, the Yue people killed the Three Emperors, etc.), the more Wu, Chu, or Qin Zheng Baiyue, there were princes or generals who fled to Japan with an army, and then claimed the throne in Japan.