Daigigakoi Shell Midden - Credit: Wikimedia Commons
is an archaeological site consisting of a Jōmon period Shell midden and the remains of an adjacent settlement located in what is now the town of Shichigahama, Miyagi Prefecture in the Tōhoku region of northern Japan. Due to the quantity, quality and variety of artifacts discovered, it has become a type site for the dating of Jōmon period remains in the southern Tōhoku region. It has been protected by the central government as a National Historic Site since 1968. Read more on Wikipedia
Source: en.wikipedia.org