the well-developed areas of ATL in each region of Kyushu, Shikoku, and Tōhoku in detail, carriers are preserved at high rates in small settlements that were isolated from the surroundings and inconvenient for traffic. The path of natural infection of this virus is limited to vertical infection between women and children (most often through breastfeeding) and horizontal infection between males and females (most often from males to females through sexual intercourse). Based on the above, Hinuma concluded that the high frequency area of this virus indicates the high density remain of Jōmon people. Ikawazu Jōmon studies A partial genome analysis by McColl et al. in 2018 about the prehistoric peopling of Southeast Asia analysed 26 ancient samples from Southeast Asia spanning from the late Neolithic to the Iron Age. They analysed an Ikawazu Jōmon (named IK002) sample from the Ikawazu Shell Midden site (伊川津貝塚) on the Atsumi Peninsula of southern Aichi Prefecture in central Honshu, and a draft sequence of the Jōmon genome was determined from IK002. This Jōmon individual was found to share some ancestry with prehistoric Hoabinhians, who also share some ancestry with Onge and Jehai (Peninsular Malaysia) in mainland Southeast Asia, which may represent gene flow from that group into the Jōmon period population. The Ikawazu Jōmon sample could be modeled as possible admixture of Southeast Asian Hoabinhian and East Asian Amis people. Her mitochondrial mtDNA is Haplogroup N9b which is typical of Northeast Siberian populations, this haplogroups in present-day Japaneses people (< 2.0%), but typically found in previous studies of Jomon mtDNA N9b 4% in Okinawans, 6.9% in modern Ulchi 8% in Modern Ainu, 32.3% in the Udegey, People of the Amur-Ussuri where the region carry high frequencies of N9b. A more recent genetic analysis of the Ikawazu Jōmon sample (IK002), by Gakuhari et al. 2020, next to two additional Jōmon samples from northern Honshu and Hokkaido, found contradicting results. The Jōmon people descended predominantly from an Basal-East Asian population and does not share ancestry with Hoabhinians or Onge as suggested by McColl in 2018. The authors note that there is no genetic evidence for admixture or that the ancestral Jōmon lineage is closer to Hoabinhians, rejecting the conclusion by McColl. They concluded that there is also no evidence that Jōmon formed from admixture of Onge/Hoabhinians and Ami-related groups but that the Jōmon are mostly the direct descendants of the East Asian-related Upper Paleolithic population which