Abstract：A new geographical information system(GIS)-based landslide risk prediction method using Hayashi¢s quantification theory is proposed and applied to a landslide prone area in Minamata City of Kumamoto Prefecture. In the past，Hayashi¢s quantification theory was used in slope failure hazard mapping；however，the preparation of larger spatial data is very hard；the work efficiency is low；and the reliability of the results is doubtful sometimes. A preparation method of a series of GIS-based spatial data is proposed for quantification theory analysis；and the results of the analytical results can be input into GIS to make hazard map directly. The application of the proposed method in Minamata area shows that the created hazard map agrees well with the real slope failure condition.
