01 / Igusa-type pottery
Pottery found in the 1940 surveywas named for the place, Igusa.

In 1940 the first excavation at the Igusa site turned up Jomon pottery, later named Igusa-type ware after the place. The deep bowls have a flared rim and round base, with a twisted-cord pattern over the whole surface. The photo shows a replica.
- Survey of 1940 (Showa 15)
- Early Jomon, first half (about 9,000 years ago)
- The ward calls it its only type site

