In castle towns centering on Atago Castle in Shishikui, Shishikuiura Honmachi, Kajiyamachi, Nagayamachi, and other towns, folk houses have traditionally built Buccho-zukuri under the eaves of most of the houses and used them to close the doors instead of the shutters at the front door. At the same time, the porch was widened during the daytime, and was widely used by merchants to display products, and by ordinary private houses as an extension of the living room.