Sotogahama Town, Aomori Prefecture

Odai Yamamoto Site

Designated as a historic site on March 27, 2013

Time division - Incipient
Site overview

Site overview

This site from the beginning of the Incipient Jomon period (13,000 BCE) is located on a fluvial terrace at an altitude of 26 m on the left bank of the Kanita River flowing into Mutsu Bay on the central eastern side of the Tsugaru Peninsula in Aomori Prefecture.

Potshards and arrowheads have been unearthed along with stone tools exhibiting characteristics of the Paleolithic period. Radiocarbon dating of carbonized material adhering to a potshard indicates an age of 12,680 ± 140 – 13,780 ± 170 yrB.P., suggesting the item was made around 16,500 years ago. A Mikoshiba-Chojakubo stone tool assemblage unearthed together with the potshards shows characteristics of the final phase of the Paleolithic period.

The potshards with the earliest characteristics have no impressions, marks indicating rope attachment or other markings. These artifacts are considered to help clarify the origins of pottery as an important element in the establishment of the Jomon culture.

Observation of potshard distribution helps to paint a picture of living environments centering on pottery. As no pillar holes, hollows or underground holes have been found at the site, these ancient dwellers are thought to have lived in mobile tents or similar. A compact and functional living environment is presumed, and no other remains have been found. These characteristics suggest that the people here used land minimally rather than building structures and developing land, and adapted to the natural environment. This indicates a transitional process to the permanent settlements of early Jomon culture.

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Basic Information

Display the Odai-Yamamoto Site
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Site Location

Kanita Odai-Yamamoto, Sotogahamamachi, Higashi-Tsugaru-gun, Aomori prefecture

Facility Exhibiting Excavated Articles

Sotogahama town Oyama Furusato Museum
Kanita Odaisawabe 34-3, Sotogahamamachi, Higashi-Tsugaru-gun, Aomori prefecture, 030-1307
0174-22-2577 / +81-17-422-2577
9:00 – 16:00
Tuesday if Monday is a national holiday
Year-end and New Year holidays (Dec. 29 – Jan. 4)
■~5 min. on foot from JR Odai Station (Tsugaru Line)
■~15 min. by car from JR Kanita Station (Tsugaru Line)
■~55 min. by car from JR Shin-Aomori Station (Tohoku Shinkansen Line)
Access map in Japanese(PDF:37.2KB)


Social Education Department, Sotogahama Town Municipal Board of Education

Kanita Takadoya 44-2, Sotogahamamachi, Higashi-Tsugaru-gun, Aomori prefecture, 030-1393
0174-31-1233 / +81-17-431-1233
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Aomori Prefectural Museum

A great number of unearthed artifacts relating to the era stretching from the Paleolithic period to the Yayoi period in Aomori Prefecture are on display in the museum’s archaeological exhibition room (permanent exhibition), including potshards from around 16,500 years ago excavated at the Odai-Yamamoto Site.

Hon-cho 2-chome 8-14, Aomori, Aomori prefecture, 030-0802
017-777-1585 / +81-17-777-1585
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