Abstract: There is provided a sinkage prediction device including: a variation data acquisition unit 10 analyzing time-series observation data measured by using an earth observation technology and acquiring horizontal direction variation data which is data indicating a horizontal direction variation on a ground surface; and a sinkage prediction unit 20 determining, based on the acquired horizontal direction variation data, whether at least one of the variation in the time axis and the variation in the space axis on the ground surface is in a predetermined state and predicting a location on the ground surface indicating the variation determined to be in the predetermined state as a potential sinkage location where there is a possibility of occurrence of sinkage, wherein it is possible to predict the location where the sinkage may be likely to occur by determining, based on the horizontal direction variation data obtained by analyzing the observation data measured by using the earth observation technology, whether the va