The Tokoro Forest of Remains, situated along the Okhotsk Coast, is home to a large collection of ruins that date all the way back to the Jomon period. Visitors to the forest can learn about the ancient pit dwellings of inhabitants, which were dug-out homes common among the Jomon and Satsumon cultures nearly 24,000 years ago. At the Tokoro Ruins Center, excavated relics, artifacts, and restored dwellings are kept on display. The ruins that still stand here have been designated as Important Cultural Properties and preserved for future generations to enjoy.
The Tokoro Forest of Remains
N1, Odori, Kitami, Hokkaido
http://www.kitamikanko.jp/en/sightseeingspotinkitami/tokororuins.html