Japan has stopped planning for a stable world. That is the plain message of the country’s 2026 Diplomatic Bluebook, which says the post-Cold War era is over and that the security environment around Japan is as severe and complex as at any time since the Second World War. Chinese military activity, North Korea’s nuclear and missile programs, Russian cooperation with Pyongyang and the erosion of the rules-based international order drive that reading.
The alliance and the wider web
The US alliance stays the “cornerstone” of Japan’s foreign and security policy. Tokyo says it will build up deterrence and response capabilities with Washington, widen economic cooperation and economic security, and deepen ties with the Trump administration. But it does not stop there. Japan plans to update its Free and Open Indo-Pacific policy and work more closely with Australia, India, South Korea, ASEAN, the Pacific Island countries, the G7, the European Union and NATO. The Quad and other small groupings are described as practical tools for that.
India gets particular attention. The Bluebook calls it “an important partner in realizing FOIP” and promises deeper cooperation on security, the economy, investment, innovation and people-to-people links under the “Special Strategic and Global Partnership.” Southwest Asia, India included, is marked as strategically important because it sits on sea lanes connecting Japan with West Asia and Africa, and as a market and production base thanks to its large population and growth.
Handling China
China is the hardest part. Japan voices concern about military activity around its territory, in the East and South China Seas and near the Senkaku Islands, and about tensions across the Taiwan Strait. Yet it keeps its stated aim of “constructive and stable Japan-China relations” and stresses dialogue. Stronger deterrence, then, with a channel to Beijing left open.
Economic security and technology
Economic security now sits much nearer the center of policy. Tokyo wants sturdier supply chains for critical minerals, steady energy and food supplies, protection for critical technologies and defenses against economic coercion. It also wants high standards kept under the CPTPP and reform of the WTO. The document counts AI, quantum technology, cyber capabilities, drones and information warfare among the issues that bear on national power and security. Japan calls for international rules on emerging technologies while building up its own ability to handle cyber threats and disinformation.
Beyond Asia
The Bluebook says Japanese diplomacy has to account for the differing interests of developing and emerging countries, not treat the Global South as one bloc. Africa is described as a key part of it, given demographic growth and natural resources. Japan plans to deepen ties through development cooperation, technology and investment, including the “Economic Region Initiative of Indian Ocean-Africa” announced at TICAD 9. ASEAN is central to the Indo-Pacific policy, with cooperation planned in maritime security, digital technology and AI, green transformation, connectivity and human-resource development. Latin America and the Caribbean, Central Asia and the Pacific Islands also get more attention, particularly where economic security, resources, markets and connectivity are involved.
Japan stays committed to the UN and wants Security Council reform. It also admits that existing institutions are struggling with current crises, so cooperation among allies and like-minded countries counts for more alongside the UN system.
