Comprehensive analysis of the measures to tackle the global warming by the Japanese government from the perspectives of the cost efficiency

对“日本自愿排污权交易计划”、“大公司与中小企业信用交易计划”、“京都机制信用获取计划”、“全国排污权交易试点市场”和“补偿信用计划”从政策制定过程、分配方式、成本效益以及对实现《京都议定书》目标的影响等方面进行了评价和比较。因此，可以说：1)日本正在为排污权交易计划建设强有力的基础设施；2)从国外获得的信用额度与国内温室气体减排项目的成本效率差异可能不会太大；3)国内减排计划的制度设计将对日本大公司乃至整个日本京都目标的实现产生重大影响；4)考虑到共同效益，应支持利用国内排污权交易计划等减排措施进行进一步发展。

"Japan voluntary emission trading scheme (JVETS)", "Credit trading scheme between the large companies and the small/medium companies", "Kyoto mechanism credit acquisition program (KMCAP)" "Experimental Nationally-Integrated Market for Emissions Trading" and "Offset Credit Scheme (J-VER)" were evaluated and compared from the view points of policy formulation process, allocation method, cost-efficiency and impacts on the achievement of the target defined in the Kyoto Protocol. As a result, it can be said that : 1) robust infrastructure for the emission trading scheme is being constructed in Japan, 2) the difference of the cost-efficiency between the credit acquisition from the overseas and that from the domestic GHG emission abatement projects may not be so large, 3) system design of the domestic mitigation scheme will have a big impact on the achievement of the Kyoto target both for the large companies in Japan and for Japan as a whole, and 4) considering the co-benefits, mitigation measures utilizing such as domestic emission trading scheme should be supported for further development.