Abstract
This research aims to the estimating method of CO2 emission from household sector in municipal level in Japan. The energy consumption by each fuel is estimated by energy utilization efficiency and building-type-coefficient, and this value are corrected by whole amount in bigger region. The result of estimate shows that electricity, LPG and paraffin oil consumption are larger as population decrease. In contrast to this, city gas consumption is larger as population increase. Furthermore CO2 emissions from cities which have over one million population occupy about 20% in Japan. On the other hand emissions of the cities which have below 100 thousand people occupy about 40%. These results present the importance of global warming prevention policies in medium and small city.
