In the early half of the Jomon period, dwellings were generally quadrilateral, trapezoid or elliptical in shape and were found to have six large columns, as well as support columns located near the wall, based on small pits that were found in archaeological excavations.
縄文時代前期では、概ね方形、台形、楕円形で、6本の主柱をもち、壁面周辺に支柱穴とも推察されるピット(考古学)が並んでいる状況が見られる。