Claim: Genetic and anthropometric studies on Japanese people have included speculation from various scholars of a common origin from two separate periods, the Yayoi and the Jōmon period.
Evidence: have about 9-13% Jōmon ancestry (which is highest in the Ainu people, who are largely of Jōmon descent) and the majority of their ancestry from the Yayoi people. From the point of view of genetic studies, Japanese people: Currently, the most well-regarded theory is that present-day Japanese are descendants of both the indigenous Jōmon people and the immigrant Yayoi people. The origins of the Jōmon and Yayoi people have often been a subject of dispute, and a recent Japanese publisher has divided the potential routes of the people living on the Japanese archipelago as follows: The Yayoi people (, Yayoi jin) were an ancient ethnic group that migrated to the Japanese archipelago mainly from the Korean Peninsula during the Yayoi period (300 BCE–300 CE). The Jōmon period (, Jōmon jidai) is the time in Japanese prehistory, traditionally dated between c. 14,000–300 BCE, recently refined to about 1000 BCE, during which Japan was inhabited by a hunter-gatherer culture, which reached a considerable degree of sedentism and cultural complexity.