Fellow Researchers Profile



Senior Research Fellow

Co-Director, East Asia Program, Stimson Center
[Research Themes]
Security and international politics studies for resolution of new social issues
Enhancing dissemination of Japan's views and information to other countries, and international networking
Study on policy simulation


  • Japanese foreign and national security policy
  • US-Japan alliance
  • US national security and defense policy toward Asia

Working papers, Papers and Reports



1996.05 Master of Arts, International Relations, The Paul H Nitze School of Advanced International Studies, Johns Hopkins University
1993.03 Bachelor of Liberal Arts, International Christian University


2018.03 - present Co-Director, East Asia Program, Stimosn Center
2017.03 - present Director, Japan Program, Stimson Center
2012.01 - present Senior Research Fellow, The Canon Institute for Global Studies
2011.01 - 2011.12 Research Fellow, The Canon Institute for Global Studies
2009.04 - 2010.12 Visiting Fellow, The Canon Institute for Global Studies
2004.06 - 2008.08 Research Fellow, Stimson Center
2001.08 - 2004.02 Research Associate, Center for Strategic and International Studies
2000.01 - 2001.07 Research Associate, Stimson Center
1996.09 - 1999.10 Special Assistant for Political Affairs, Embassy of Japan, Washington, DC USA


  • Key Challenges in Japan's Defense Policy (Stimson Center, March 2020)
  • China-Russia Security Cooperation: Implications for Japan (National Bureau of Asian Research, May 30, 2019)
  • International disaster response: Rebalancing the Quad? (Stimson Center, March 2019)
  • Balancing Between Nuclear Deterrence and Disarmament: Views from the Next Generation (Stimson Center, 2018)
  • Lost In Translation? U.S. Defense Innovation and Northeast Asia (Stimson Center, 2017)
  • Japan and Peacebuilding:Views from the Next Generation (Stimson Center 2017)
  • Japan as a Peace Enabler: Views from the Next Generation (Stimosn Center, 2016)
  • US-Japan-Australia Security Cooperation: Prospects and Challenges (Stimson Center, 2015)
  • Japan's Global Diplomacy: Views from the Next Generation (Stimson Center, 2015)
  • Japan's Foreign Policy Challenges in East Asia: Views from the Next Generation (Stimson Center, 2014)
  • Opportunity out of Necessity: The Impact of US Defense Budget Cuts on the US-Japan Alliance (Stimson Center 2013)
  • The New Nuclear Agenda: Prospects for US-Japan Cooperation (Stimson Center, 2012)
  • North Korea: Challenge for the US-Japan Alliance (Stimson Center, March 2011)
  • Global Security Watch: Japan (co-author) (Praeger Publishers, September 2010)
  • Japan's National Security Infrastructure: Can Tokyo Meet Washington's Expectation? (Stimson Center, 2008)
  • Strategic Yet Strained: US Force Realignment in Japan and its Effects on Okinawa (editor and contributor) (Stimson Center, 2008)
  • Japan's National Defense Establishment: Institutions, Capabilities and Implications (editor and contributor) (Stimson Center, 2007)


  • "Japan's approach to terrorism" Asian Conflicts Report, Spring 2016 (Geneva Center for Security Policy)
  • "Japan Under DPJ Rule: The Costs for Overemphasizing Polical Leadership" (Harvard International Review, Winter 2013)
  • "Great East Japan Earthquake: Lessons Learned for Japan's Defense Posture" (Asia-Pacific Review, November 2012)
  • “A Short-Term Challenge to the US-Japan Alliance Putting its Long-Term Health at Risk” Asia Policy Number 10 (July 2010) pp. 35-42.
  • “US foreign policy and the role and the function of think tanks” (co-author) Kokusai Mondai, October 2008
  • “Japan's public diplomacy study: how to effectively communicate information in national interest” (co-author) Tokyo Foundation 2007


Professional Memberships

2012 Awarded the Letter or Appreciation by Minister of State for National Policy for "Passion wihtout borders" initiative
2009 Recipient of the 5th Yasuhiro Nakasone Award Incentive Award
2006.09 Testimony in front of House Committee on International Relations, US Congress