Republication from

Review of the currently accepted demographic model of the Japanese population on the continent. (University of Tokyo )

The current thinking about the origin of the Japanese population maintains that the original residents, Jomon’s people, were met about 2,500 years ago by a separate group mainly from the Korean Peninsula, the Yayoi people. However, archaeological evidence used to achieve this conclusion is insufficient to tell the final story. Now DNA evidence from Y chromosomes provided the necessary data.

Researchers from the University of Tokyo conducted a census of the Japanese population some 2,500 years ago using Y chromosomes living on the main islands of modern Japan. For the first time, the analysis of modern genomes estimated the size of the ancient human population before they were met by a separate ancient population.