He joined NIES since 2000 and one of the main members to develop the Asia-Pacific Integrated Model (AIM) to assess policy options for stabilizing global climate. He is lead author of IPCC Special Report on Renewable Energy Sources and Climate Change Mitigation (SRREN). Recently he is serving as a member of joint committee on Japanese INDC (Intended Nationally Determined Contributions) under MOEJ and METI, as well as an advisory committee member of “FutureCity” initiatives (Cabinet Office, Japan). He also joins Iitate village (which has suffered severe damage by nuclear accidents regarding the Great East Japan Earthquake, in Fukushima) revitalization planning committee since August 2011. He received his B.S/M.S/Ph.D. in Electrical Engineering from the University of Tokyo. He has joined UNFCCC/COP process as NGO since COP11 and nowadays visits many Asian countries/cities to make LCS happen. He is senior advisor to ICLEI Japan and senior fellow to IGES.