Mogami-class frigate

Mogami-class frigate. The Mogami-class is a new class of multi-mission stealth frigates being built for the Japan Maritime Self-Defense Force (JMSDF) as part of its ongoing fleet modernization. Designed to replace older vessels like the Abukuma-class destroyer escort, these ships emphasize reduced crew requirements, advanced sensor integration, and enhanced capabilities in anti-submarine warfare and mine warfare. The class represents a cornerstone of Japan's maritime strategy in the Indo-Pacific region, balancing cost-effectiveness with formidable combat power.

Development and design

The development of the Mogami-class, initially designated 30FFM, was driven by the JMSDF's need for a more affordable and numerous surface combatant to counter growing regional threats, particularly from the People's Liberation Army Navy and the Korean People's Navy. The program was managed by the Ministry of Defense (Japan)'s Acquisition, Technology & Logistics Agency, with primary design work by Mitsubishi Heavy Industries. Key design philosophies include extensive use of stealth technology, such as angled surfaces and composite material enclosures for weapons and boats, to reduce radar cross-section. The integrated mast houses the advanced OPY-2 active electronically scanned array radar, similar to systems on the larger Maya-class destroyer. A significant innovation is the incorporation of an unmanned surface vehicle for mine countermeasures, reducing risk to the crew and allowing the frigate to perform roles traditionally assigned to dedicated vessels like the Awaji-class minesweeper.

Specifications

The Mogami-class has a full load displacement of approximately 5,500 tonnes, making it one of the largest modern frigates. Its combined gas turbine and electric propulsion system, featuring a Rolls-Royce MT30 main turbine, provides a speed in excess of 30 knots. The combat system is built around an advanced command and control suite that integrates data from the OPY-2 radar, OQQ-25 variable depth sonar, and the OAX-3 electro-optical/infrared system. Armament is comprehensive, centered on a 16-cell Mk 41 Vertical Launching System for the Type 03 Chū-SAM medium-range surface-to-air missile, an Mk 45 Mod 4 naval gun, and eight canister-launched Type 17 SSM anti-ship missiles. For close-in defense, it mounts an 11-cell SeaRAM system. The ship's aviation facility includes an enclosed hangar capable of supporting one SH-60K helicopter.

Ships in class

A total of 22 ships are planned. The lead ship, *Mogami* (FFM-1), was commissioned in April 2022 at the JMDF Maizuru Naval Base. The second ship, *Kumano* (FFM-2), was commissioned that same month. Subsequent vessels follow a naming convention after historic rivers, with ships including *Noshiro* (FFM-3), *Mikuma* (FFM-4), *Agano* (FFM-5), *Yūbetsu* (FFM-7), and *Yodo* (FFM-8). Construction is split between Mitsubishi Heavy Industries' Nagasaki Shipyard and Mitsui Engineering & Shipbuilding's Tamano Works, with an accelerated build rate to quickly bolster the JMSDF's order of battle. The class is intended to form the backbone of the JMSDF's escort flotillas alongside destroyers like the Asahi-class destroyer.

Operational history

Since their entry into service, Mogami-class frigates have been rapidly integrated into frontline JMSDF formations. *Mogami* and *Kumano* were quickly assigned to the JMSDF Escort Flotilla 3, homeported at JMSDF Maizuru Naval Base. These ships have participated in major annual exercises such as Annualex and Keen Sword, often operating alongside vessels from the United States Navy, including Arleigh Burke-class destroyers and Independence-class littoral combat ships. In 2023, *Kumano* undertook a significant Indo-Pacific deployment, making port visits to countries like India and Vietnam, and participating in the multilateral exercise Malabar (naval exercise). Their operational debut underscores Japan's commitment to Freedom of Navigation Operations and enhancing maritime security partnerships across the region.

Export and variants

The success of the domestic program has led to efforts to market an export variant, often referred to as the MHI 30FFM, to friendly nations. A modified design was selected by the Philippine Navy under its Horizon 2 acquisition program, with a contract signed in 2023 for vessels that will be equipped with different radar and combat systems. Talks have also been reported with potential customers in Southeast Asia, including Indonesia and Thailand. Furthermore, the basic hull design is serving as the basis for the JMSDF's next-generation ASEV (ASEAN-oriented Security Enhancement Vessel) program, aimed at providing capable patrol ships to regional partners. These export activities are supported by the Japanese government's revised principles on Defense Equipment Transfers.