Hoshigatō obsidian mine site


Hoshigatō Hoshigatō obsidian mine site is a Jōmon period archaeological site consisting 193 shallow interconnected pits over a 35,000 square meter area, from which obsidian had been mined, located in what is now part of the town of Nagawa in the Chubu region Japan. It has been protected by the central government as a National Historic Site since 2015.

Overview

The site is located northwest of slope of Mount Kirigamine at an altitude of 1500 meters, in a 35,000 square meter forested area. Obsidian, or "volcanic glass" was frequently used for tools and weapons in the Japanese Paleolithic period as it could be fractured to produce sharp blades or arrowheads, and frequently occurs in volcanic formation around Japan. Excavation surveys found that obsidian was extracted from here from the early Jōmon period and late Jōmon period . Chemical analysis also indicated that obsidian from this site was supplied to settlements distributed across an extremely wide range from Tōhoku to the Tōkai region, indicating long distance trade. The site was discovered in 1920, and was excavated from 1959-1961, and again in 1997.
There is no public access or facilities at the site.