Security

The security environment surrounding Japan is becoming increasingly challenging. Key factors include a full-blown strategic competition between the US and China, an unstoppable maritime expansion by China, the opaque future of denuclearization on the Korean Peninsula, the deepening confrontation between China and Taiwan, and ongoing tensions in the Strait of Hormuz. Domestic issues such as the US military base presence in Okinawa and Japan’s declining birthrate and aging population, as well as technological innovations that are changing the nature of warfare are also having a significant impact on Japan's security.

In response to these multifaceted challenges, JIIA is conducting cutting-edge research on the state of Japan's security and issues related to the Japan-US alliance. We are also actively promoting international cooperation and addressing sensitive challenges through dialogue with researchers from around the world.

Related Study Groups
Study Group on Traditional Security Risks
Study Group on Risks in New Domains (Space, Cyberspace, etc.)
Study Group on Economic Security and Japanese Diplomacy in an Era of International Competition

Event Reports

#Event Reports #Americas#China#Europe#Indo-Pacific#Korean Peninsula#Middle East & Africa#Russia, Central Asia & the Caucasus#Security#Economic Security #Center for Disarmament, Science and Technology (CDAST) #CDAST #CTBT #Science and Technology

CDAST 2nd Webinar Towards a World without Nuclear Weapons: The International Group of Eminent Persons for a World without Nuclear Weapons (IGEP)

03.12.2025

Research Findings

#Security #JIIA Strategic Comments #JIIA Platform

JIIA Strategic Comments (2025-14) Strengthening Intelligence as a Component of Japan's National Power

Jun Yanagi (Executive Director, JIIA Platform)
28.11.2025
#Europe#Security #Research Reports #Disarmament / Non-proliferation #Science and Technology #CDAST

[Research Report] The Franco-British Northwood Declaration: a new model of nuclear partnership and deterrence?

Timothée Albessard(Special Research Fellow, The Japan Institute of International Affairs. Graduated from The École Normale Supérieure (ENS) in Paris, France)
24.07.2025
#Americas#Security#Middle East & Africa #JIIA Strategic Comments

JIIA Strategic Comments (2025-13) The Tense Israel-Iran War and Japan's Middle East Diplomacy

Koichi Nakagawa (Adjunct Fellow, The Japan Institute of International Affairs)
09.07.2025
#Security#Economy & Global Issues #JIIA Strategic Comments

JIIA Strategic Comments (2025-11) The Global Order at a Critical Crossroads: The Response of the West

Tomoyuki Yoshida (Chief Executive Director, The Japan Institute of International Affairs)
26.05.2025
#Europe#Security #JIIA Strategic Comments #Disarmament / Non-proliferation #Science and Technology #CDAST

JIIA Strategic Comments (2025-10) The brawns and the brains of conventional deterrence against Russia in Europe

Timothée Albessard(Special Research Fellow, The Japan Institute of International Affairs. Graduated from The École Normale Supérieure (ENS) in Paris, France)
22.05.2025
#Indo-Pacific#China#Security #JIIA Strategic Comments

JIIA Strategic Comments (2025-08) The Lai Administration's First Anniversary and the Gray Zone Situation Surrounding the Dongsha Islands

Koichiro Matsumoto (Managing Director, Research and Programs, The Japan Institute of International Affairs)
14.05.2025