01 / Shell mound
Shells and fish bones, eaten and thrown away,came out in stacked layers.
Natsushima Shell Mound is an Early Jomon site. Digs in 1950 and 1955 found stacked shell layers, with pottery mainly of the Natsushima type, stone tools and bone fishhooks. Clam, short-neck clam and oyster shells and bones of tuna, mullet and black sea bream also came out. Measurements from the same shell layer gave a value of about 9,500 years ago.
- National Historic Site (designated 1972)
- Measured at about 9,500 years ago
- Excavated in 1950 and 1955
