Japan Tests 1,500 km-Range Tomahawk-like Cruise Missile

The Japanese Ministry of Defense, in collaboration with the Ground Self-Defense Forces, conducted tests of the new 12SSM-ER cruise missile, which has an approximate range of 1,500 km..

The missile was launched from a ground-based platform with a Mitsubishi 8×8 Gen.2 heavy vehicle. It is 9 meters long, 1 meter in diameter, and weighs 1,600 kg, making it comparable to the U.S. Tomahawk missile.

The tests took place in October and early November 2024, with five launches conducted in total—three from land-based launchers and two from surface platforms. The tests occurred on October 4, 14, and 17, with the ship-based version launched on October 28 and November 1. The 12SSM-ER missile is expected to enter service with Japan's anti-ship regiments by late 2025, extending their operational range from 400 km to 1,500 km.

The missile is intended for installation on Japan’s Maritime Self-Defense Force surface combat ships, including destroyers and frigates. It is also part of a broader missile development program, which includes two new cruise missiles with ranges of 2,000 to 3,000 km. The missile’s design is based on the Type 17 naval missile and will also be adapted for aircraft use on F-2 fighters, with its development scheduled for completion by 2027.

Japan's missile development is unrestricted by the Intermediate-Range Nuclear Forces Treaty, unlike the United States, as Japan was not a signatory. This has allowed Japan to pursue longer-range missile capabilities, despite political pressure from the U.S.

These missile advancements are seen as crucial for strengthening Japan’s defense posture, especially in response to the growing presence of Chinese naval forces near Japan’s territorial waters.