Fireplaces continued to be used until the first half of the Kofun period but saw change with the introduction of the "kamado" stove built on the northern or eastern wall of the dwelling by the middle of the period.
炉は、古墳時代前期まで続くが、古墳時代中期になると北側や東側の壁に竃を設ける住居が出現する。