Senior Research Fellow, Policy Studies Department
Security Studies, Regional Studies-Areas of Expertise
Areas of Expertise
Space Policy Space Security

Academic History and Professional Experience Education

  • 2007
    B.A. in Policy Management, Keio University
  • 2008-2009
    Research Fellow, Center for the Promotion of Disarmament and Non-Proliferation, Japan Institute of International Affairs
  • 2009
    M.A. in Media and Governance, Keio University
  • 2009-2019
    Research Fellow, National Institute for Defense Studies
  • 2013
    Visiting Scholar, Space Policy Institute, Elliott School of International Affairs,
    George Washington University (August-October)
  • 2015-2016
    Lecturer (Part-time), International Relations Faculty, Tokyo International University
  • 2015
    Ph.D. in Media and Governance, Keio University
  • 2019-present
    Senior Research Fellow, National Institute for Defense Studies
  • 2022-2023
    Visiting Scholar, UC Institute on Global Conflict and Cooperation
  • 2024-present
    Guest Associate Professor (Part-time), Faculty of Policy Management, Keio University

Selected Publications Selected Publications


  • The Oxford Handbook of Space Security
    Saadia M. Pekkanen and P.J. Blount, eds. (Oxford University Press, 2024)
  • Book Guide to International Security
    AKAGI Kanji and Japan Association for International Security, eds. (Keio University Press, 2024) *Japanese
  • Order and Disorder in Space Security: Past, Present, and Future
    (Chikura Publishing Company, 2020) *Japanese
  • Aspects of Disarmament and Non-Proliferation
    Japan Association of Disarmament Studies, ed. (Shinzansha Publisher Co., Ltd., 2019) *Japanese
  • Disarmament Dictionary
    Japan Association of Disarmament Studies, ed. (Shinzansha Publisher Co., Ltd., 2015) *Japanese
  • Classic Books on Strategic Theories: From Sun Tzu, Machiavelli to Present
    NONAKA Ikujiro, ed. (Chuokoron-Shinsha, Inc., 2013) *Japanese

Articles in Academic Journals

  • "Cislunar Security: U.S. and Chinese Activities in Cislunar Space and Future Issues"
    Security & Strategy, Vol. 3, No. 2 (March 2023) *Japanese
  • "The Creation of the Space Force and the Space Command in the United States: Background and Intent of the Creation and Assessment of the Stand-up Status"
    Security & Strategy, Vol. 2, No. 2 (March 2022) *Japanese
  • "A New Tide in the Military Use of Space: The Significance of the Growing Use of Space in the U.S. Combat Operations"
    KEIO SFC JOURNAL, Vol. 15, No. 2 (March 2016) *Japanese
  • "Debates over the Military Value of Outer Space in the Past, Present, and the Future: Drawing on Space Power Theory in the US"pdf
    NIDS Journal of Defense and Security, No. 14 (December 2013)(Originally published in Japanese in Boei Kenkyusyo Kiyo [NIDS Security Studies], Vol. 15, No. 2, February 2013)
  • "The Proliferation of Space Capabilities and its Impact on the US National Security, Focusing on the Issue of Space Control"
    The Journal of Strategic Studies, No. 9 (March 2011) *Japanese
  • "An Asian Perspective on the New US Space Policy: The Emphasis on International Cooperation and its Relevance to Asia"
    Space Policy, Vol. 27, Issue 1(February 2011)

Other Publications