Spatiotemporal analysis of major CO

Understanding greenhouse gas emissions from the building sector is crucial for climate change countermeasures. In Japan, a law was enacted in 2006 requiring corporations that emit greenhouse gases above a certain level to report to the national government. Furthermore, under this law, information on business locations (geographical bases) has been publicly available since fiscal year 2021, making it possible to grasp the actual spatiotemporal greenhouse gas emissions of cities based on real data, which was previously difficult to obtain from publicly available information. The purpose of this study is to conduct a spatiotemporal analysis of emission locations and emissions, focusing specifically on the building sector, using publicly available information for fiscal years 2021-2022 under Japanese Mandatory GHG Accounting and Reporting System, a Japanese law, to clarify the actual emissions of Japan's building sector. Furthermore, in the building sector, total floor area is an important variable for evaluating energy consumption efficiency. However, building total floor area is generally not available from publicly available information. Therefore, in this study, a separately obtained database of building floor area (building name and latitude/longitude) was integrated with publicly available information from the reporting system by geocoding building names and latitude/longitude information, enabling a spatiotemporal analysis of energy use intensity. The results of the spatiotemporal analysis make it possible to understand area-wide energy use (e.g., district heating and cooling) and locations where the community energy management system is most effective. These results are expected to enable the formulation of effective climate change mitigation measures in cities.