The latest version (Ver. 2.0) of " the Atmospheric Dispersion Model for Exposure and Risk Management (ADMER) ", which is designed to estimate the distribution of regional atmospheric concentrations of chemical substances and the exposure to populations, has been developed. This version has a built-in function to analyze sub-grids that will assist users in their analysis of small areas such as cities, wards, towns, and villages. This function increased the surface imagery considerably from every 5 km to the maximum of every 100 m. In addition to this feature, the new version has been given the representational function and improved user-friendliness brought about by the geographical information system (GIS) with the various improvements to respond users' requests.