Japan has launched the final vessel of its Mogami-class multi-role frigates, with Mitsubishi Heavy Industries completing construction of the 12th ship for the Japan Maritime Self-Defense Force. The launch of JS Yoshii (FFM-12) at MHI’s Nagasaki facility marks the conclusion of a key naval modernization initiative.
Named after the Yoshii River in Okayama Prefecture, the frigate represents the final unit built under the Mogami-class program. The Japanese Ministry of Defense awarded the contract for the ship in early 2024, with the deal valued at approximately 58.3 billion yen. The program reflects Tokyo’s continued investment in advanced surface warfare platforms to replace legacy vessels and address evolving maritime security challenges.
Introduced in 2019, the Mogami-class frigates are designed to succeed the JMSDF’s Abukuma-class, delivering enhanced stealth, automation, and multi-mission flexibility. Eight ships are already operational, while three additional vessels are in the final stages of outfitting following their launches. The class is expected to form the backbone of Japan’s future frigate fleet.
With a length of about 133 meters and a displacement approaching 4,000 tons, the Mogami-class features a compact crew model of roughly 90 personnel. The frigates can reach speeds of around 30 knots and are armed with a comprehensive suite of weapons, including a 127mm deck gun, missile systems for air and surface threats, anti-submarine weapons, torpedoes, and mine warfare equipment, providing the JMSDF with a highly versatile maritime combat capability.
