In the C13th the Kamakura Shogunate constructed a 20km rock bulwark to thwart Mongol invasions from the West.  The Imazu section still stands and is designated a National Historic Monument.  This is a detailed excavation report illustrated with photographs of various wall sections showing their trench foundations and stone packing.  A lengthy text (in Japanese) accompanies the photographs.  Paperback.  46 pages plus eight b&w plates.  Good clean condition.  Cat No N161