ALOS (Advanced Land Observing Satellite) was launched in January 2006, and this made it possible for the Geographical Survey Institute (GSI) to acquire high-resolution images (2.5 m) from the satellite’s sensor PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping). It is expected that PRISM will be applied to the mapping and revision of 1:25,000-scale topographic maps. In collaboration with the Japan Aerospace Exploration Agency (JAXA), GSI has finished verifying and demonstrating the feasibility of PRISM images for mapping and revision of 1:25,000-scale topographic maps, and has started using the images in its mapping program. This report describes this feasibility study and details the actual applications of PRISM images for topographic mapping.