The middens associated with such settlements contain bone, botanical material, mollusc shells, sherds, lithics, and other artifacts and ecofacts associated with the now-vanished inhabitants, and these features, provide a useful source into the diets and habits of Jōmon society.

The northern Kasori Kita Shell Midden dates from the middle Jōmon period (about 5000 to 4000 years ago), and has a diameter of 130 meters.

The site also contains the ruins of a settlement with 110 pit dwellings, the largest of which had a diameter of over 19 meters.

A total of 53 human remains were also found (14 middle, 35 late, four final Jōmon period), and the bones of six dogs.

The site is located about a 15 minutes walk from Sakuragi Station on the Chiba Urban Monorail.