| skos:altLabel | - terraces
- terrace
- terraced
- Terrace
- alluvial
- Terraces
- Fluvial terrace#Types
- River Gravel Terraces
- River terrace
- alluvial terrace
- alluvial terraces
- fluvial terrace
- river gravel terrace
- river gravel terraces
- river terrace
- river terraces
- river terracing
- stream terraces
- terrace habitats
- valley benches
- [river terrace]] of the Shinano River and contains the ruins of a large moated village from the middle Jōmon period (approximately 5300 to 4000 years ago). The area was developed as a plantation for paulownia trees for many years, and was converted to farmland after World War II. The ruins were first discovered in conjunction with a field improvement project. The first archaeological excavation of the site was conducted from 1970-1973, revealing the foundations for 49 circular pit dwellings and three large rectangular-sided structures with sides measuring 10 meters, and one stone-paved structure. These structures were arranged around a roughly circular plaza 120 meters in diameter. From the distribution of the structures, it has been estimated that the settlement had perhaps 200 houses in total, with chestnut wood used in their construction. Larger structures were not residences, but were used for some communal or ceremonial purpose.
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