an irimoya style roof is composed of a kirizuma-zukuri style roof in its upper part (which inclines backward and forward when viewed from the longer side of the roof ) and a yosemune-zukuri style roof in the lower part (which inclines in each of the four sides of a rectangular house ). 入母屋造の屋根は、上部においては切妻造(長辺側から見て前後二方向に勾配をもつ)、下部においては寄棟造(前後左右四方向へ勾配をもつ)となる構造をもつ。