The Japanese energy sector: Current situation, and future paths

As the world’s third leading economy and a major importer of fuels, the choice of future energy paths and policies that Japan makes in the next few years will have a significant influence on the energy security of the world as a whole, and of the Northeast Asia region in particular. In this article we describe the current status of and recent trends in the Japanese energy sector, including energy demand and supply by fuel and by sector. We then discuss the current energy policy situation in Japan, focusing on policies related to climate change targets, renewable energy development and deployment, liberalization of energy markets, and the evolution of the Japanese nuclear power sector. The final section of the article presents the structure of the Japan LEAP (long‐range energy alternatives planning software system) dataset, describes several alternative energy paths for Japan – with an emphasis on alternative paths for nuclear power development and GHG emission abatement – and touches upon key current issues of energy policy facing Japan, as reflected in the modeling inputs and results.