AI interpretationAI-generated
An early Okhotsk genome directly confirms ancient Jomon-Kamchatka admixture in northern Japan.
The Okhotsk culture once spread along the southern coast of the Sea of Okhotsk. Earlier work on a late Okhotsk individual suggested two migrations from the Russian Far East to northern Japan: one from Kamchatka around 2,000 years ago, another from the Amur Basin around 1,600 years ago. That implied a mixed Kamchatka-Jomon population existed between 2,000 and 1,600 years ago, but no direct DNA proof was available. Now, an early Okhotsk individual from northern Japan fills that gap.
- The early Okhotsk individual NAT004's genome can be modelled as a mixture of Kamchatka and Jomon ancestries.
- This provides direct genetic support for the previously hypothetical admixed population in northern Japan between 2000 and 1600 BP.
- It adds new evidence about prehistoric population dynamics in northern Japan, linking Kamchatka and Jomon lineages.
Sample interpretation
The site sample count is two individuals, both assigned to the Okhotsk culture. Y-chromosome haplogroups could not be resolved for either sample. Mitochondrial DNA is available for both: one carries G1b-G16129A! and the other D4m2a. Both come from the same site label, DRR680858. This small sample set means the genetic conclusions rest mainly on the newly reported early Okhotsk genome, NAT004, rather than on a large population-wide survey.
For genealogy enthusiasts
For ancestry enthusiasts, this is a clear case where ancient DNA confirms a suspected admixture event. It shows northern Japan was a contact zone where Kamchatka and Jomon lineages met, helping you place Okhotsk culture in the broader peopling of Northeast Asia.
Abstract
The prehistoric Okhotsk culture was distributed along the southern coastal regions of the Sea of Okhotsk during the late first millennium AD. A previous study that performed whole-genome sequencing of a late Okhotsk individual suggested two migration waves from the Russian Far East to northern Japan. The first wave is estimated to have originated from the Kamchatka Peninsula around 2000 years before present (BP), and the second from the Amur Basin around 1600 BP. These findings suggest the past existence of an admixed hypothetical population between the Kamchatka and indigenous Jomon lineages in northern Japan between 2000 and 1600 BP, although direct genetic evidence has not yet been obtained. Here, we present the genome data of an early Okhotsk individual (NAT004) excavated from northern Japan. Admixture modelling reveals that the genome can be explained as a mixture of Kamchatka and Jomon ancestries, providing direct support for the existence of the previously hypothesized hypothetical population. This result offers new insights into the prehistoric population dynamics of northern Japan and contributes to the broader understanding of its archaeological and anthropological history.