List of documents written by or co-written by KAJIYA Yasuhiko V-152, Greater Sapporo ITS Experimental Project - Smart Sapporo Snow - Info Experiment V-153, Research on the Safe Driving Support System for Winter Roads V-92, Study on Visibility of Light -Emitting Display Devices and Delineators in Road Traffic in Winter Blowing Snow Conditions VI-201, Slope Benching and Shrub and Tree Restoration as an Avalanche Countermeasure along a Road