Ōmori Shell Mounds - Credit: Wikimedia Commons
The was an archaeological site on the border of Shinagawa, Tokyo and Ōta, Tokyo, in the Kantō region of Japan containing a late Jōmon period shell midden and settlement ruin. The site was designated a National Historic Site of Japan in 1955, with the area under protection extended in 1986. Read more on Wikipedia
Source: en.wikipedia.org