"The first of Japan's two new cruiser-sized Aegis System Equipped Vessels (ASEV) is continuing to take shape, recently receiving its huge main integrated mast, giving the vessel a new and remarkably imposing silhouette. The four very large fixed arrays for the ship's powerful AN/SPY-7(V)1 radar will eventually be integrated onto this structure. The ASEV's stated primary mission is missile defense, but Japanese authorities plan to give the vessels additional counter-drone, anti-ship, and land attack capabilities in the future. Tomahawk cruise missiles are notably set to be added to the ship's arsenal down the line.
The ASEVs are large surface combatants, set to be some 620 feet long, have a beam (the widest point of the hull) of some 82 feet, and a standard displacement of 12,000 tons. For comparison, Japan's largest surface combatants today, its Maya class destroyers, are just over 557 feet long, have a beam of some 73 feet, and a standard displacement of around 8,200 tons. It is worth noting here that the size of new and advanced destroyers, often optimized for anti-air warfare missions, has been trending upward globally in recent years. This, in turn, has caused the line between destroyers and what have more historically been categorized as cruisers in certain cases.
The first ASEV was laid down at Mitsubishi Heavy Industries' (MHI) shipyard in Nagasaki in July 2025. The second was laid down in February of this year at Japan Marine United Isogo shipyard, which is situated in Yokohama City near Tokyo, according to a past report from Naval News. The Japanese Ministry of Defense is currently aiming to have the first of these vessels in service before the end of the country's 2027 Fiscal Year, which runs from April 2027 to March 2028. The second is expected to follow in the 2028 fiscal cycle, which extends into 2029…"
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