In this paper, we developed a method on quantifying carbon dioxide (CO 2 ) emissions from each building of Tokyo. And the method basing on bottom-up approach and supplemented with some downscaling efforts that could be applied in any other city of Japan. The high-resolution emission map is achieved by linking the national census data with spatial data. At first, the emissions from fossil fuel consumption (nonelectric) in residential and industrial & commercial buildings are counted by the census area level and then allocated to each building by using the height, site area, floor and type of buildings. The types of buildings are distinguished by using the information on building type contained in urban landscape raster map. The emissions are estimated and mapped by Geographic Information System (GIS) technique. The total CO 2 emissions from residential buildings of Tokyo in 2014 are about 5,826 Gg and that from industrial & commercial buildings are about 13,085 Gg. This method will be helpful for high resolution quantification of CO 2 emissions in local scale.