Odai Yamamoto I site


The Odai Yamamoto I site is an archaeological site in the town of Sotogahama, Aomori Prefecture, ], in the Tōhoku region of northern Japan.Excavations in 1998 uncovered forty-six earthenware fragments which have been dated as early as 14,500 BC ; this places them among the earliest pottery currently known. As the earliest in Japan, this marks the transition from the Japanese Paleolithic to Incipient Jōmon. Other pottery of a similar date has been found at Gasy and Khummy on the lower Amur River. Such a date puts the development of pottery before the warming at the end of the Pleistocene.

Overview

The Odai Yamamoto I site is located on a fluvial terrace at an altitude of 26 meters on the left bank of the Kanita River flowing into Mutsu Bay on the eastern side of Tsugaru Peninsula. Pottery shards found during the rebuilding of a private residence in 1998 were submitted for radiocarbon dating by the Aomori Prefectural Board of Education, and were found to have been produced 16,500 years ago, making it the oldest known pottery in the world at that time. A total of 148 m2 was excavated in 1998. Further finds included axes, spearheads, arrowheads, scapers, blades, and anvils, mostly of local shale but some also of obsidian. The arrowheads are of special significance as they push back the beginnings of the history of archery. The site forms part of a serial nomination submitted in 2009 for future inscription on the UNESCO World Heritage List, under criteria iii and iv: Jōmon Archaeological Sites in Hokkaidō, Northern Tōhoku, and other regions. As no indication of permanent dwellings have been found at the site, it is assumed that the ancient inhabitants of this area were still nomadic.

Dating

Thirty of the forty-six fragments of pottery, all from the same vessel, had carbonized residues, suggesting its use for the cooking of foodstuffs. Eight AMS radiocarbon dates were generated from five of the fragments and three pieces of associated charred wood; these suggested a date of 11,800 to 11,500 BC. With calibration, this dating was pushed back to 14,500 to 14,000, as early as around 16,500 BP. Other datings have given a range between 13780 ± 170 and 12680 ± 140 BC. This makes the site important to the understanding of the transition between the Pleistocene and the Holocene. In recognition of their importance, the excavated artifacts have been designated a Municipal Cultural Property.
Stoneware and pottery excavated from this site is preserved at the Oyama Furusato Museum at the Oyama Elementary School. The site has received protection as a National Historic Site of Japan in 2013.