论文部分内容阅读
After Fukushima nuclear accident in 2011,status of renewable energy in Japan is about to change significantly.In 2012,introducing dramatic of renewable energy in the power sector,such as solar power is expected by the start of the feed-in tariffs.Other renewable energies such as wind,small-hydro,geothermal and biomass have several issues caused by excessive regulations or limitation of power system.Current status of renewable energy policy such as Feed-in tariffs in power sector of Japan is investigated proposing disclosure of the information from the Ministry of Economy,Trade and Industry (METI).At the same time,status of renewable energies such as solar,wind,small-hydro,geothermal and biomass are annually summarized in “Renewables Japan Status Report” as private initiative by ISEP in the same way as Global Status Report by REN21.On the other hand,the development of the system for the statistics of renewable energy in Japan is delayed in comparison of the system in European countries such as AGEE-stat in Germany.For developing countries,IRENA is starting to support renewable energy database framework,REDAF.In contrast,along with the current situation and challenges of renewable energy in Japan,current initiative and issues for statistics and trends of renewable energies are investigated in this paper.Moreover,as indicators for sustainability of each region,prefecture and municipality level in Japan,renewable energy ratio is annually estimated using statistics data of power and heat supply by renewable energies compared with energy demand.The region of 100% renewable energy is called “sustainable zone” in this study.