NATO-IP4 Relations Remain Strong Despite Leader Absence

The absence of leaders from NATO’s Indo-Pacific partners—Australia, Japan, New Zealand, and South Korea, collectively known as the IP4—from the 2026 NATO Summit for the second consecutive year might suggest a downturn in relations. However, a deeper analysis indicates otherwise. The primary variable affecting the IP4 leaders' presence was not a lack of interest but the evolving structure of the summits themselves. Furthermore, regular leader-level attendance at annual NATO summits may no longer be the essential driver for NATO-IP4 relations. The rationale for continued cooperation between NATO and the IP4 remains as robust as ever in the current geopolitical climate. The substance and direction of engagement, institutionalization at the sub-leader level, and practical application are more critical for gauging commitment than summit optics. The summits from 2022 to 2024 featured two-day North Atlantic Council (NAC) leader-level meetings, while the 2025 and 2026 summits were shortened to one day. This adjustment reflects practical considerations regarding the US president's engagement time. Without an opportunity to participate in NAC discussions, the IP4 leaders were effectively invited to a supplementary event rather than the core deliberations. For busy heads of state, such an invitation might not outweigh competing domestic and regional priorities, especially when their defense ministers were attending complementary events. Equating summit representation with the health of partner-alliance relationships would be a mistake. Leader attendance in earlier years was crucial for advancing NATO-IP4 relations, publicly establishing their importance, and generating top-down momentum. These objectives have largely been met, reducing the necessity for continued leader-level participation. By 2024, all IP4 countries had signed Individually Tailored Partnership Program (ITPP) documents outlining their bilateral NATO relationships. They have dedicated ambassadors to NATO and are engaged in priority areas such as Ukraine support, cyber defense, disinformation, and technology. While leader-level attention is the best driver for momentum and deepening these relationships, the absence of top leaders from regular summit intervals can be offset by increased involvement of defense and foreign ministers and continued high-level NATO visits to the region. NATO is actively creating such opportunities, and IP4 partners are responding. Geopolitical drivers for continued engagement include mutual interests and benefits. As close US allies (or key partners like New Zealand), the IP4 and NATO nations can exchange best practices and views on managing the US alliance relationship, particularly as the US president issues demands for burden-sharing and assistance. Shared concerns about multi-theater conflict involving China and Russia also underscore the need for coordination. The war in Ukraine has demonstrated that security challenges in the Euro-Atlantic theater have significant indirect consequences for the Indo-Pacific theater, and vice versa.