Hokkaido Archaeological Operations CenterHokkaido Archaeological Operations Center opened in Ebetsu, Hokkaidō, Japan in 1999. Its aim is to protect, preserve, and utilize buried cultural properties.WWW domaibun.or.jpHistoryIn December 2017, researchers from the Hokkaido Archaeological Operations Center announced the discovery of the oldest ancient stone with a human face painted on it, estimating its creation date between 2,500 and 1,000 B.C.DescriptionThe exhibition hall features two Important Cultural Properties: an earthen Jōmon mask from the Mamachi Site and artefacts excavated from the Bibi 8 Site.CollectionFrom Chitose City: Stone rods unearthed at the, animal-shaped clay figure, Jomon clay mask350x80x33cm chiseled monolithMagemono made of Thujopsis, excavated in Yukanboshi