The Qin dynasty terraformed Japan in the 3rd century B.C. a la Xu Fu. The Qin are the progenators of the Yayoi.

https://en.wikipedia.org/wiki/Xu_Fu

After he embarked on a second mission in 210 BC, he never returned.

https://en.wikipedia.org/wiki/Yayoi_period

The Yayoi period is generally accepted to date from 300 BC to 300 AD

Obviously some correspondence of time right there.

Strangely though, the current Japanese ignore Xu Fu and even claim ancestry from the Fujian Wu kingdom:

https://en.wikipedia.org/wiki/Wu_(state)

Ambassadorial visits to Japan by the later Chinese dynasties Wei and Jin recorded that the Wajin of Japan claimed to be descendants of Taibo of Wu, traditionally believed to be the founder of Wu.[6] Several scholars suggest that the Yamato people and the Imperial House of Japan are descendants of the Wu and possibly Taibo.[7][8] Many Japanese historians also link the early Japanese Yayoi people to the Baiyue tribes that also include the Wu people.

It's so uncanny how cuckholdry correlates with claim of ancestry, it must be true. After Xu Fu, there must have been an influx of Fujian cucks overrunning the island when the progeny of Xu Fu were down, like what happened in China in early 20th century whereby southern cucks took control of northern peoples when the north was down.

The New Qin will have a mission to terraform Japan once again via Xu Fu 2.0 and make it great again. Japanese will resemble the terracotta warriors once again.