By the end of the mid-Jomon period, dwellings with fukushiki-ro (fireplaces consisting of an arrangement of stones composed of two parts) began to appear in southern Tohoku region, along with houses with stone-laid floors in the Chubu region, especially Nagano Prefecture.
中期後葉の東北地方南部では複式炉をともなう住居が現れ、中部地方とくに長野県などでは石敷の住居も現れる。