Present Status and Points of Discussion for Future Energy Systems in Japan from the Aspects of Technology Options

Michihisa Koyama1,2, Seiichiro Kimura2, Yasunori Kikuchi2,3, Takao Nakagaki4 and Kenshi Itaoka2 1 Inamori Frontier Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan 2 International Institute for Carbon-Neutral Energy Research, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan 3 Presidential Endowed Chair for “Platinum Society,” e University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan 4 Department of Modern Mechanical Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan