From investigations based on excavation, the following were found: Dug-standing pillar buildings, warehouses, wells, ditches for partitioning the land area or for drainage, and holes to store water or to dump garbage.
発掘調査では、掘立柱建物や倉庫、井戸、土地の区画や排水のための溝、水を溜めたりゴミを捨てるための穴などが見つかっている。