Australia turns to Japan for a rapid frigate expansion
Australia has committed to a major frigate acquisition that ties together naval urgency, industrial policy and deeper strategic alignment with Japan. Under Project Sea 3000, Australia and Japan have signed a deal for three upgraded Mogami-class frigates to be built by Mitsubishi Heavy Industries in Japan, with another eight to follow in Western Australia.
The agreement, signed earlier in April aboard JS Kumano in Melbourne, is notable on several fronts. It is described as Japan’s largest-ever defense export, it gives Australia a faster path to replacing aging warships, and it expands a defense relationship that has become more important as Indo-Pacific security concerns intensify.
The first Japanese-built frigate is scheduled for delivery by December 2029. The broader effort, including construction in Australia, is expected to cost as much as A$20 billion over the next decade, about double the amount indicated two years earlier.
Why Australia is moving quickly
The Royal Australian Navy’s surface fleet is under pressure. Australia currently operates 10 surface combatants: three Hobart-class destroyers and seven Anzac-class frigates. The Anzac class is due to be replaced by the upgraded Mogami design.
That transition matters because officials are trying to avoid a prolonged dip in fleet capacity as older ships age out before new ones arrive in force. Defense Minister for Defence Industry Pat Conroy described the procurement as the fastest peacetime acquisition for the Royal Australian Navy, underscoring how urgently Canberra views the need.
Rear Adm. Stephen Hughes, the navy’s Head of Naval Capability, framed the issue less as a simple decline in ship count than as a transition toward more capable vessels. In his account, the Mogami program is intended to deliver a generational shift not just in weapons and sensors, but also in how the navy crews and operates ships.
