Germany-Japan Defence Cooperation Expands in 2026

Germany and Japan Strengthen Defence Ties Amid Global Pressures

In March 2026, Boris Pistorius took a trip to Japan. This action, by Germany's minister for defence, hinted at a new geopolitical truth: Japanese and European security is now linked and shaped by the same revisionist pressures, the same technology race, and the same question of industrial resilience.

This convergence is further underlined by Japan's effort to participate in the European Union's Security Action for Europe (SAFE) framework, which aims to reinforce Europe's defence technological and industrial base. But Japan's effort to join SAFE also exposes a tension that will define the next phase of Europe-Japan defence-industrial cooperation: as Europe seeks trusted external defence partners, its defence turn is becoming a project of internal industrial consolidation, supply security and political control.

"While the case for deeper EU defence-industrial cooperation with Japan is strong, bilateral and minilateral projects with Germany and Poland are currently more credible"

As such, while the case for deeper EU defence-industrial cooperation with Japan is strong, bilateral and minilateral projects with Germany and-in more selective form-Poland are currently more credible. An EU-wide industrial breakthrough will not happen until the correct legal, political and commercial conditions exist across the continent.

Where Germany and Poland Come In

Pistorius, accompanied by industry representatives, intended to show Tokyo that Berlin wants to move beyond strategic dialogue and towards more concrete cooperation. But the German bottleneck is its delay in becoming a defence-oriented ecosystem capable of turning political urgency into industrial delivery. Links between the armed forces, major companies, suppliers, startups and research institutions remain too weak, too opaque and too poorly aligned with capability demand.

This makes Germany a relevant test case, however. Berlin's 2026 defence budget is around €82.7bn, while Japan's 2026 defence budget exceeds ¥9tn ($58bn); both countries are growing their budgets and building up defence supplies after lengthy periods of restraint. Established defence-industrial corporations in Germany, such as Rheinmetall, are door openers and gatekeepers. What the German government adopts, and what kind of defence-industrial cooperation is established, will be what fits their strategy. This means that new solutions that are disruptive to the core business risk being left outside.

Japan's entry into Germany is therefore likely to occur through complementary industrial cooperation, such as air and missile defence-here, European demand is rising and Japan excels, specifically in advanced electronics, radar and seeker-related technologies and other relevant hardware. A partnership that links Japanese-origin sensing and processing to German-led and European interceptors and command architecture would therefore fit better than a politically sensitive contest over complete systems. The same logic applies in electronic warfare, C4ISTAR and software-heavy defence functions. Japan has depth in secure communications, radar, signal processing and other high-end electronics, while Germany is powerful in systems integration, and land and naval platforms.

Alleviating Doubts

For Europe to make its case for cooperation persuasive, and for Germany and Poland to turn this into concrete projects, it must address two doubts.

The first is interoperability. Japanese technology is excellent, but this does not mean it easily integrates into NATO and EU procurement ecosystems. Here, bilateralism matters: Germany or Poland can evaluate interoperability through discrete projects and supply-chain links before any wider EU-level scaling, particularly as Germany has an Agreement on the Security of Information (GSA) with Japan and the EU does not.

The second is political reliability. Japan is a dependable strategic partner, but its defence-industrial system is shaped by export controls and a domestic debate over how far arms export liberalisation should go. This means that Europeans should expect Japanese political consent for deeper defence-industrial cooperation to be easier to obtain for incremental, high-trust projects than in broad, open-ended commitments.

Bilateralism as the First Step

The wider lesson is that instruments such as SAFE are not the same thing as an integrated defence-industrial system. Europe still lacks the degree of centralised demand, standardisation and procurement that, for example, allows the United States to absorb innovation and scale production quickly. As long as the EU market remains segmented by national budgets and different industrial and strategic interests, Europe's cooperation with Japan will be more effective via flexible coalitions.

Bilateralism is not a fallback from ambition, but the mechanism through which it becomes deliverable. For example, Germany can use SAFE to lever cooperation that already makes sense under national demand, especially in missile-related subsystems, to secure communications, military mobility, maritime resilience and cyberspace functions. Poland, on the other hand, could be a testbed for targeted niche collaboration. Brussels should focus on the enabling layer: information-security arrangements, standards, export-control dialogue and frameworks which enable successful bilateral projects to scale outward later.

Europe's partnership with Japan has thus moved beyond symbolism; but it stumbles on execution. While the political logic is mature and the industrial logic compelling, the ecosystem that connects demand, innovation, production and trust across borders remains underdeveloped. That is why the next phase of EU-Japan defence-industrial cooperation will not be decided at summits-rather, in factories, procurement pathways, supply chains and the institutional habits of the states that claim to want it most.