A dwelling with square ground shape that carries on the tradition from last period of the Jomon period and a dwelling with a distinctive shape, which has a round ground shape with a bowl like shallow concavity at center and a pair of small hole (could be holes for pillars) at the side of the concavity, both from earlier period are found in northern Kyushu.
早期の北部九州の住居には、縄文時代晩期の系譜を引き継ぐと考えられる平面方形のもののほかに、平面円形で中央に浅い皿状のくぼみを持ち、その両脇に小さな穴（柱穴か）を1対持つ特徴的な形態の住居が存在する。