抄録
This treatise is a report for the recorded original erosion-control dams, which are called the Sunadome in Mt. Kinugasa or Mt. kannonzi in Shiga Prefecture (Ohomi district). They are considerd as the most old ones in existing Sunadome in Japan. We state the present condition about them, then the point of view of government to the control to debris flow to the towns around the Kannonzi castle.
