Hoshigatō obsidian mine site
Japan
The Hoshigatō obsidian mine site (, Hoshigatō kokuyōseki gensanchi iseki) 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 Chūbu region Japan. It has been protected as a National Historic Site since 2015.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).