Thin planks of mulberry, cherry, oak or chestnut wood cover the roof of simple single-storey rectilinear, low pitch gable roofs of the ‘Kirizuma’ style houses. They are held down with stones.
Previously, these houses could be seen in rural areas of the central and southern districts of Hida. The roofs generally last up to 5 or 6 years, and replacement was usually done in November.