Their characteristics are that on mountains which are 200 - 400 meters high, "kiriishi" (stones made by breaking rocks) about 70 centimeters wide, were placed from the top to the middle of the mountain, running for several kilometers, and which had a water gate when passing through a valley.
特色は、標高200～400mの山頂から中腹にかけて数kmにわたって一辺が70cm位の切石（きりいし＝岩を割って作った石）による石積みを配列し、谷を通過するときには水門を設けていること。