Residential and commercial building sector accounts for more than 30% of final energy consumption in Japan and an increase from the past is remarkable. In order to realize a low-carbon society, further strengthening of energy saving measures is essential. Japanese government is considering a mandatory policy scheme which forces all residential and non-residential buildings to meet the energy efficiency standard by 2020. This research aims to marshal trends on regulations for energy efficiency of residential and non-residential buildings within countries which implements advanced measures, and to obtain referential knowledge for Japan's energy efficiency measures.
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