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ISEP is an independent, non-profit research organization, founded in 2000 by energy experts and climate change campaigners. Through our work we aim to provide resources and services to realize sustainable energy society.

The social mission of ISEP is to work towards changing Japan into a sustainable energy society, while simultaneously urging more rapid development of renewable energy.

Tetsunari IIDAFounder & Chairperson


After 3.11: Aiming for the Fourth Revolution

Fukushima Daiichi nuclear accident triggered by the Great East Japan Earthquake, will remain as one of the worst disasters in world history. This disaster will be remembered as a third major turning point in Japanese history after the Meiji Restoration and the end of the Pacific War.

With nuclear power, there is always a risk that a large disaster on the scale of Fukushima will occur, another risk associated with nuclear power is the semi permanent nuclear waste it produces. These are two basic risks that cannot be avoided.  Many people now clearly see that supporting nuclear power, as a means to prevent global warming, is nothing more than a deep indiscretion. Without nuclear power, for a short time we cannot avoid relying on natural gas, coal, and oil for our energy supply. However, there is always the fear that a jump in fossil fuel price will directly affect our lifestyle and economy. When all is said and done on top of the economic challenges to utilizing fossil fuels, humans must also confront the huge environmental risk of global warming.

In context to these challenges, our only truly sustainable type of energy is renewable energy.  In human history until this point, there have been three major revolutions, the Agricultural Revolution, the Industrial Revolution, and the IT Revolution. As rapid progress continues to be made in the renewable energy field, renewable energy is called the fourth revolution. This fourth revolution will be an energy revolution, a green industrial revolution, and a decentralized network revolution. These three elements will bring about jobs, energy, and economic benefits to our various regions. Renewable energy will create a lot of employment and economic opportunities, while at the same time domestically it will allow Japan to drift away from fossil fuel. Further, instead of spending money on traditional forms of energy, investment can be made in renewable energy. Already the movement towards green energy has started both amongst citizens and in various regions in Japan.

The combined earthquake and nuclear power plant disaster of 311 was an extremely tragic calamity that not only left great liabilities for future generations, but also left a historical legacy. Isn’t now the time for us to start, one by one, preparing and mobilizing for the 21st century green energy revolution?

The social mission of the Institute for Sustainable Energy Policies (ISEP) is to work towards changing Japan into a sustainable energy society, while simultaneously urging more rapid development of renewable energy. For that reason without remaining focused on overly theoretical research, our organization will design strictly realistic and implementable policy. Further, along with implementing a new societal direction, ISEP will be open platform for social innovation in order to enhance social entrepreneurship and social finance.

From now on ISEP intends to act as a societally revolutionary and open platform. In response to environmental crisis, our organization will promote a society that creates future forms of energy. We at ISEP are anticipating everyone’s participation and support for our organization.

Tetsunari IIDA, Founder & Chairperson


Board of Trustees

  • Tetsunari IIDA (Executive Director, Institute for Sustainable Energy Policies)
  • Toru SUZUKI (Director general, Hokkaido Green Fund)
  • Makoto TAJIMA (Researcher,  Institute for Sustainable Energy Policies)
  • Hironao MATSUBARA (Chief Researcher, Institute for Sustainable Energy Policies)
  • Noriaki YAMASHITA (Senior Researcher, Institute for Sustainable Energy Policies)


  • Hiroyuki KAWAI (Lawyer)

Board of Advisors

  • Noritaka Itani (Representative, Taurus General Administrative scrivener office)
  • Izumi USHIYAMA (President, Ashikaga Institute of Technology)
  • Yugo ONO (Professor, Hokkaido University)
  • Yuichi KAITO (Lawyer)
  • Minoru KUMAZAKI (Honorary President, Tsukuba University)
  • Takamitsu SAWA (Former President, Shiga University)
  • Haruki TSUCHIYA (President, System Technology Laboratory, Co.,Ltd. )
  • Koichi HASEGAWA (Professor, Tohoku University)
  • Ayako FUJII (Chief Director, Environment Co-operative Union Shiga)
  • Iwane FUJII (Professor, Meiji University)
  • Norihiro MITSUHASHI (Professor, Chiba University of Commerce)
  • Tomas Kåberger (Professor, Chalmers University of Technology, Sweden)


  • Tetsunari IIDA, Founder&Chairperson
  • Hironao MATSUBARA, Chief Researcher
  • Noriaki YAMASHITA, Senior Researcher
  • Shota FURUYA, Researcher
  • Makoto TAJIMA, Researcher
  • Yu Takaku, Researcher
  • Christian Doedt, Researcher
  • Eric Martinot, Senior Research Fellow
  • Toshihiko TAKEMOTO, Senior Fellow
  • Akira URAI, Project Manager