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Japan has approached NATO about participating in the DIANA defense startup accelerator, a move that would make it the first non-NATO country to join the program. The talks are ongoing, with no final decision announced yet.
Japan has formally approached NATO to participate in the alliance’s defense startup accelerator, DIANA, marking the first time a non-member country has entered such a program, NATO officials confirmed on May 16, 2026. The move highlights Japan’s interest in deepening defense cooperation with NATO and expanding its technological partnerships.
According to a senior NATO official, discussions are currently in preliminary stages, with no formal agreement yet reached. NATO Assistant Secretary General Tarja Jaakkola confirmed the talks during a press briefing in Tokyo, emphasizing that Japan’s participation would be a historic development for the alliance’s outreach to non-member countries. The DIANA program, launched in 2022, aims to support innovative defense startups across NATO member states to enhance military technology and interoperability.
Japan’s interest in joining the program underscores its strategic focus on strengthening defense ties with Western allies amid regional security concerns. The formal approach was reportedly initiated by Japanese officials earlier this year, and negotiations are ongoing, with no timeline for a final decision announced.
Why It Matters
This development is significant because it signals a potential shift in NATO’s engagement with non-member countries, particularly in Asia. Japan’s participation could foster closer technological collaboration and interoperability with NATO allies, influencing regional security dynamics. For Japan, joining the program would provide access to NATO’s defense innovation ecosystem, potentially boosting its own military modernization efforts.
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Background
NATO launched the DIANA program in 2022 to support defense startups across its member states, aiming to accelerate technological innovation within NATO’s military capabilities. Until now, participation has been limited to NATO members, with the United States, the UK, and several European countries involved. Japan’s approach to NATO reflects its broader strategy to strengthen security partnerships amid rising regional tensions, particularly with China and North Korea. This move also aligns with Japan’s recent efforts to expand defense cooperation with Western allies, including recent joint exercises and technology sharing initiatives.
“Discussions are ongoing with Japan regarding their participation in DIANA. We see this as a historic step in expanding our technological cooperation beyond NATO borders.”
— NATO Assistant Secretary General Tarja Jaakkola
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What Remains Unclear
It is not yet clear whether Japan’s participation will be finalized, what specific roles or commitments might be involved, or how the alliance plans to integrate a non-member country into the program. Details of the negotiations remain confidential, and no official timeline for a decision has been provided.
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What’s Next
Next steps include continued negotiations between NATO and Japanese officials, with potential formal agreements expected if talks progress positively. NATO may also clarify the scope of Japan’s participation and outline the benefits and responsibilities involved. Observers will be watching for any official announcements or updates in the coming months.
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Key Questions
What is the DIANA program?
DIANA is NATO’s defense startup accelerator launched in 2022 to support innovative defense technology companies and enhance military capabilities across member countries.
Why is Japan’s involvement significant?
It would be the first time a non-NATO country participates in the program, signaling a potential expansion of NATO’s technological partnerships beyond its traditional borders.
What are the implications for regional security?
Japan’s participation could deepen technological and strategic ties with NATO allies, influencing security cooperation in Asia and beyond, especially amid regional tensions.
When will a final decision be made?
No official timeline has been announced; negotiations are ongoing, and a decision is expected in the coming months.
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