A Comparative Analysis on Three Different Supporting Methods to Expand Renewable Energies in JapanA Comparative Analysis on Three Different Supporting Methods to Expand Renewable Energies in JapanAN00071538
Taking the Paris Agreement, the 26% GHGs reduction target up to 2030 and the 50% GHGs reduction target in the long-run up to 2050 into consideration, the reasonable increases of electricity by renewable energies will be one of quite important options as an effective GHGs reduction measure. In this study, we would like to arrange merits and demerits of three different supporting methods adopted in Japan in order to expand renewable energies.Considering from the viewpoint of rapid and drastic expansion of renewable electricity, it would be concluded that the FIT system is the most suitable. Considering from the viewpoint of gradual and systematic expansion of renewable electricity, it would be concluded that the RPS system is the most preferable.On the other hand, considering from the viewpoint of PPP (public and private partnerships), participants widely expanded and induced advertisement effects, it would be concluded that the green certificate system is the most excellent.Three different supporting systems have individual merits and demerits discussed in this paper. We should pursue reasonable and effective improvements for the future by taking excellent merits of other systems.