Hoshikuso Pass obsidian mine ruins

Hoshikuso Pass obsidian mine ruins - Credit: Wikimedia Commons

The is an archaeological site consisting shallow pits from which obsidian had been mined during the Jōmon period. It is located in the Daimon neighborhood of the town of Nagawa in the Chūbu region Japan. It has been protected as a National Historic Site since 2001. Read more on Wikipedia

type: ancient site
date from: Jōmon period

Source: en.wikipedia.org