Meteorological Research Institute (MRI) has carried out climate change projection with the global climate model that has about 280 km mesh, and the results make an important contribution to the 4th Assessment Report of IPCC. The results also utilized to drive the MRI regional climate model (RCM) with 20 km mesh to make projection of climate change in Japan. The information on the regional climate changes, in temperature, precipitation etc., are presented for several climatological partitions, such as North Japan, East Japan, and West Japan, or the Sea of Japan side and the Pacific side. Since the global warming is now unequivocal, more detailed and accurate information is demanded from water resources, disaster prevention, agriculture, forestry, and other industries, and human health, for the purpose of making adaptation and mitigation. For these requests, MRI launched a 5-year research project "Comprehensive Projection of Climate Change around Japan due to the Global Warming" in FY2005. In this research project, we develop "cloud resolving regional climate model" that explicitly treats clouds with 4 km mesh, which has capability of projections for small scale phenomena reflecting detailed orography in Japan, such as heavy rainfall and frequency of extreme events. We also develop "MRI Earth System Model (MRI-ESM)" in order to reduce uncertainty of global warming projection. Based on the state-of-the- art global climate model, carbon cycle processes in land and ocean, source and transport of aerosols, and chemical reactions of trace gases including ozone are modeled and integrated into the earth system model. Change in ice sheets, which is an important factor to the sea level change, will also be capable with the model. The target of this project is to provide detailed climate change information around Japan to promote adaptation and mitigation for the global warming in Japan, based on the simulation with the sophisticated regional climate model, fed by reduced uncertainty with the earth system model.