SYDNEY – A closer defense partnership between Australia and New Zealand is increasingly pointing toward a potential second major contract for Japan’s Mitsubishi Heavy Industries (MHI), this time for the supply of upgraded Mogami-class frigates to the Royal New Zealand Navy. While New Zealand continues to evaluate options for replacing its aging Anzac-class frigates, recent signals suggest Japan’s design is a frontrunner, building on Australia’s decision in August 2025 to procure the same vessels.
The potential deal represents a significant win for Japanese defense contractors and underscores a growing trend of regional security cooperation in the Indo-Pacific. New Zealand’s Defence Minister has indicated the government is carefully considering all options, but the alignment with Australia’s procurement strategy – and the benefits of interoperability – are clearly influencing the process. The Australia-New Zealand alliance is increasingly focused on coordinated defense acquisitions.
Australia’s Frigate Decision and Regional Implications
Australia’s selection of the Mogami-class frigate, built by MHI, as its future general purpose frigate was formally announced in August 2025. The decision followed a “rigorous and competitive tender process,” according to a statement from the Australian Department of Defence. The upgraded Mogami-class was chosen to replace the existing Anzac-class frigates, with a focus on enhancing capabilities in undersea warfare and local air defence. The frigates boast a range of up to 10,000 nautical miles, a 32-cell Vertical Launch System and are equipped with surface-to-air and anti-ship missiles.
The Australian government’s move is part of a broader effort to accelerate the delivery of a larger and more lethal surface combatant fleet. The decision came months ahead of schedule, reflecting a commitment to transforming the Australian Defence Force (ADF) into a more integrated and focused force. While Thyssenkrupp Marine Systems too submitted a competitive proposal, the Mogami-class was ultimately assessed as best able to meet the ADF’s requirements quickly. The first three frigates are slated to be built offshore, with plans to enter into binding commercial contracts with MHI and the Japanese government in 2026.
New Zealand’s Naval Modernization Needs
New Zealand’s current fleet of Anzac-class frigates are nearing the end of their service life, necessitating a replacement program. The Royal New Zealand Navy operates two Anzac-class frigates, HMNZS Te Mana and HMNZS Te Kaha. The need for modernization is driven by evolving security challenges in the Pacific region and the increasing importance of maritime security. The country’s strategic location and commitment to regional stability require a capable and modern naval force.
The potential acquisition of Mogami-class frigates would not only address New Zealand’s naval modernization needs but also enhance interoperability with Australia, a key defense partner. Shared platforms and systems would facilitate joint operations, training exercises, and information sharing. This alignment is particularly significant given the growing geopolitical competition in the Indo-Pacific and the need for coordinated responses to regional security threats.
Key Specifications of the Mogami-Class Frigate
- Range: Up to 10,000 nautical miles
- Vertical Launch System: 32 cells
- Armament: Surface-to-air missiles and anti-ship missiles
The Benefits of Interoperability and Regional Security
The move towards greater defense interoperability between Australia and New Zealand is a key element of the broader regional security architecture. By adopting similar platforms, the two countries can streamline logistics, reduce maintenance costs, and enhance their ability to operate seamlessly together. This represents particularly crucial in a region where maritime security challenges are becoming increasingly complex.
The potential for a second Mogami-class contract for MHI also highlights Japan’s growing role as a defense supplier in the Indo-Pacific. Japan has been actively promoting its defense industry and seeking opportunities to expand its security cooperation with regional partners. The success of the Mogami-class frigate in both Australia and potentially New Zealand would further solidify Japan’s position as a leading defense provider.
Defence will now proceed with the next stage of the procurement process with Mitsubishi Heavy Industries, with the aim to enter early into binding, commercial contracts with Mitsubishi Heavy Industries and the government of Japan in 2026.
The next key milestone in this process will be the finalization of contract negotiations between New Zealand and Japan, expected in late 2026 or early 2027. This will determine the specific configuration of the frigates, the delivery schedule, and the terms of technology transfer and maintenance support. Further updates will be provided by the New Zealand Ministry of Defence as the procurement process progresses.
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