Abstract
This research aims to estimating business sector's energy consumption and CO2 emission in municipal level. Energy intensities in offices which have below 30 labors are investigated in the case-study of Iwate prefecture. By this case-study energy intensities of all prefectures are estimated. Energy consumption and CO2 emission of all Japan municipalities are estimated by multiplying number of labors and these intensities. The rate of energy consumption by municipalities which the amount of population is blow 300000 occupies 60% in all Japan. This fact suggests the importance of global warming prevention policies in small and middle municipalities.