Japan-US alliance, Security in Asia, Politics and diplomacy of Japan and the United States
India, Indian Ocean
Middle East and Islamic studies, peacebuilding, international cooperation
Security and international relations in Southeast Asia
Pacific Islands (Politics, Economy and Development Assistance)
Military History and Strategy, International Security Policy and Strategy, Japan-U.S. Alliance.
Indo-Pacific security; Australian foreign policy; Japanese foreign policy; Australia-Japan relations
Foreign & Security Policy of the Republic of Korea, International Relations in East Asia
International law, law of the sea, maritime security
European Security, New domains (space, cyberspace and the electromagnetic spectrum), Defense Technology Innovation
Foreign aid and security cooperation
Expertise: Russia’s foreign and security policy and Eurasian geopolitics
International Relations in South Asia
Ideology of International Relations, Theory of the International Order, Japanese Diplomatic History
Maritime Security, Chinese Military Strategy
Theory of international relations, security theory, U.S. diplomacy
Russian military and security policy
Security law (domestic and international), policy and strategy
International politics, African security
Trade, World Trade Organization, Foreign Direct Investment, Global Governance, Japan, Northeast Asia, Asia and the Pacific
Chinese Economy, Japan-China relations, East Asian Economic Integration
Contemporary Chinese Studies
Central Asian regional studies (Especially: International Relationships, Development, Water resource management)
Security （Strategic Tactics：Operational Art）, Ocean Security, National Defense Studies, Leadership
International Relations, Security Studies, Strategic Studies, U.S.-Japan Security Relations
Japan, Northeast Asia, U.S.-Japan relations, Asia and the Pacific, U.S. Strategy in Asia
Asian international relations, conventional warfare, strategic nuclear issues, wargaming.
US-Japan alliance, Security in East Asia, and emerging technology policy coordination.
Mis/disinformation ecosystem, fact-checking, press freedom, news literacy, media sociology. With strong regional focus on countries in the Asia-Pacific.
International Politics (Strategic Analysis, Cyber Security), Public Policy（Policy Analysis）
strategic communications of the second Abe administration, Japan’s foreign and security policy, and Japan-Korea relations.
International Relations, Security, American Politics and Foreign Policy, Arms Control, Defense Industries