Executive Officers

President: Kenichiro Sasae

Chief Executive Director: Tomoyuki Yoshida

Secretary General and Policy Director of the Center for Disarmament, Science and Technology: Akemi Suto

Chief Managing Director, Center for Disarmament, Science and Technology

Managing Director for Research and Programs: Koichiro Matsumoto

Senior Research Fellow

Managing Director, Center for Territory and History
Senior Research Fellow: Masao Kochi

Senior Fellows

Chushiro Yonezawa (Senior Research Fellow of the Center for Disarmament, Science and Technology)
[Expertise] CTBT (Radionuclide data analysis)

Toyomi Sakamoto (Senior Research Fellow of the Center for Disarmament, Science and Technology)
[Expertise] CTBT (Seismological data)

Tetsuo Kotani
[Expertise] Japan-US Alliance, Maritime Security


Naoko Funatsu
[Expertise] American Politics and Foreign Relations

LI Hao
[Expertise] Comparative Politics, Contemporary Chinese Politics, International Relations in East Asia

Yumi Iijima
[Expertise] China's Environmental Diplomacy and Environmental Policy

Tomoki Iimura
[Expertise] Political and Economic Issues in Korean Peninsula

Yuito Kimijima
[Expertise] Estonian Security, Small State Studies, Alliance Politics

Yuki Kominami
[Expertise] International Politics, Security Studies, Anglo-American Relations, British Diplomacy

Kyoko Kuwahara
[Expertise] Public Diplomacy, Soft Power, Disinformation

Takeo Otani
[Expertise] International Relations, Conflict Processes, Status, Japan-South Korea Relations

Shigeru Osugi (Research Fellow of the Center for Disarmament, Science and Technology)
[Expertise] CTBT (On-site inspections)

Chihiro Shikata
[Expertise] Public Diplomacy

Kotaro Shiojiri
[Expertise] International Economic Law, International Politics, Economic Security, Security Export Control

Mao Takahata
[Expertise] Nuclear disarmament and non-proliferation, Emerging technologies

Asako Takashima
[Expertise] EU, German Politics, Japanese Politics, Security Policy

Yoshiaki Takayama (Research Fellow of the Center for Disarmament, Science and Technology)
[Expertise] International Politics, Economic Security, Security Export Control

Michihiro Tajima
[Expertise] Civil-Military Relations (especially in Russia and Post-Soviet states), Security and International law in new domains (space, cyberspace, etc.)

Leo Tamamizu
[Expertise] Alliance Politics, Civil Wars, Security Relations in Asia Pacific, Social Science Methodology

Tomohiko Taniyama (Public Communication Officer)
[Expertise] Humanitarian Intervention, Military Intervention

Kotaro Tsukahara
[Expertise] Modern Japanese History, Elections and Party Organization, Comparative Political History

Kensuke Yanagida
[Expertise] International Economy, Development Issues, APEC

Yuichi Yoshida
[Expertise] Indo-Pacific Region, Risks in New Domains (space, cyberspace, etc.), International Security (Military and Energy Affair)

Senior Adjunct Fellows

Yuichi Hosoya (Professor, Faculty of Law, Keio University)
[Expertise] Diplomatic History, British Diplomatic History

Tsutomu Kikuchi (Professor Emeritus, Aoyama Gakuin University)
[Expertise] International political economy of the Asia-Pacific, APEC, Japanese foreign policy

Fumiaki Kubo (President, National Defense Academy, Japan)
[Expertise] U.S. politics and foreign policy, Japan-U.S. relations, international relations

Naoya Okuwaki (Professor Emeritus, University of Tokyo)
[Expertise] International Law

Akio Takahara (Professor, University of Tokyo)
[Expertise] Current Chinese Politics and International Relations in East Asia

Akihiko Tanaka (President of the National Graduate Institute for Policy Studies (GRIPS))
[Expertise] International politics in Asia

Adjunct Fellows

Nobumasa Akiyama (Professor, Hitotsubashi University)
[Expertise] Arms control, peace building and conflict prevention

Kiyoshi Araki (Former Ambassador of Japan to Republic of Turkey)

Masahiko Asada (Professor, Faculty of Law Department of Law, Doshisha University)
[Expertise] International Law

Hideaki Asahi (Former professor of international security, Graduate School of Arts and Sciences, University of Tokyo / Former ambassador to East Timor)

Ken Endo (Professor, University of Tokyo)
[Expertise] The European Union, Security, International Politics

Kazuko Hikawa (Professor, Osaka Jogakuin University)
[Expertise] Nuclear Disarmament and Non-proliferation

Yoko Hirose (Professor, Faculty of Policy Management Graduate School of Media and Governance, Keio University)
[Expertise] Former USSR, International politics, Russia, Frozen conflict, unrecognized states, Hybrid Warfare

Takahiro Ikawa (Director, Fujitsu Future Studies Center)

Juichi Inada (Professor, School of Economics, Senshu University / Visiting Scholar, SAIS, Johns Hopkins University( -Mar. 2024)
[Expertise] Political Economy of International Development, ODA Evaluation

Masafumi Ishii (Former Ambassador of Japan to Indonesia, Former Permanent Representative of Japan to the NATO)

Kazuhide Ishikawa (Former Ambassador of Japan to Republic of the Philippines)

Takehiro Kagawa (Chairperson, Hiroshima Peace Culture Foundation, Former Ambassador to Egypt, Former TPP chief negotiator)
[Expertise]Nuclear Disarmament Nonproliferation, Middle East, Trade Negotiation

Matake Kamiya (Professor, National Defense Academy)
[Expertise]Security, Japan-US Alliance

Nobukatsu Kanehara (Former Assistant Chief Cabinet Secretary)

Saori N. Katada (Professor of International Relations, University of Southern California)
[Expertise] International Political Economy, Japanese Foreign Economic Policy

Kenichi Kawasaki (Professor, GRIPS Alliance, National Graduate Institute for Policy Studies (GRIPS))
[Expertise] Macroeconomic Policy, Business Cycles, Economic Outlook

Hideya Kurata (Professor, National Defense Academy)
[Expertise] North and South Korean politics and foreign relations, international security

Mitsuru Kurosawa (Professor Emeritus, Osaka University)
[Expertise] Nuclear disarmament and non-proliferation

Sumio Kusaka (Former Ambassador of Japan to Australia)

Chisako T. Masuo (Professor, The Faculty of Social and Cultural Studies, Kyushu University)
[Expertise] Chinese Politics, Diplomacy, and Maritime Policy

Koichi Nakagawa (Research Director, Mitsubishi Research Institute, Inc.)
[Expertise] Middle East

Toru Nakakita (Professor, Toyo University)

Shotaro Oshima
[Expertise] Japan-U.S. Diplomatic History; Multilateral Trade/Investment Issues

Heigo Sato
(Professor, Takushoku University)
[Expertise] International Relations, Security Studies, Export Control, Arms Control and Disarmament

Kazuto Suzuki
(Professor, Graduate School of Public Policy, The University of Tokyo)
[Expertise] International Political Economy, Science and Technology Policy, Space Policy, Security Trade Control (Export Control), Economic and Targeted Sanctions, Economic Statecraft, Nuclear Safety, European Integration, Middle East Studies

Yoichi Suzuki (Former Ambassador of Japan to French Republic)

Adm. Tomohisa Takei (Former Chief of Staff, Japan Maritime Self-Defense Force)
[Expertise] Maritime Security

Shigenobu Tamura
[Expertise] Foreign Relaitions, Security

Motohiro Tsuchiya (Vice-President, Keio University, and Professor, Keio University Graduate School of Media and Governance)
[Expertise] International Relations, Cybersecurity

Toshiya Tsugami (Representative, Tsugami Workshop)
[Expertise] Chinese Economy

Kunio Umeda (Former Ambassador of Japan to Brazil, Former Ambassador of Japan to Vietnam, and Vice Chairman, National Association for Global & Open Minded Communities (NAGOMi))

Masaru Watanabe (Former Ambassador of Japan to Cuba)

Katsuyuki Yakushiji (Professor, Toyo University)

Senior Fellows (non-resident/resident)

Monika Chansoria (India)

Valerie Niquet (Fondation pour la Recherche Strategique, France)

Robert D. Eldridge

Visiting Fellows


Mr. Randolf Carr(Germany)
Senior Policy Advisor, Munich Security Conference (MSC)
[Research Topic]
"Lessons from the implementation of Japan's economic security strategy"


Mr. Daniel Mandell(U.S.A)
Former Legal Counsel, Office of the President, Koror, Palau
[Research Topic]
"How can the United States, Japan, Australia, and their like-minded partners best work together in order to effectively and efficiently provide development assistance and aid to the Pacific Island Countries?"


Dr. Stephen Nagy (Canada)
Professor, Department of Politics and International Studies, International Christian University, Tokyo
(Sep 10, 2018 - Mar 31, 2024)

More Visiting Fellows