The first of Japan’s two new Maya-class air defense destroyers was launched on 30 July under the 27DDG program. Optimized for air and missile defense, the Maya will be equipped with an Aegis baseline J7 combat system, Japan’s equivalent to the U.S. Navy’s Aegis baseline 9/BMD 5.1 standard. The new destroyer is expected to be the first Japanese warship to incorporate cooperative engagement capability, a sensor-netting system that permits multiple platforms and aircraft to form an integrated air and missile defense network by sharing real-time target data. The 577-foot Maya-class guided-missile destroyers are follow-on vessels based on the earlier Atago-class. Displacing 8,200 tons standard and more than 10,000 tons fully loaded, the Maya is expected to join the fleet in 2020 and will be followed by an as-yet-unnamed sister in 2021. Both ships will likely be fitted with SM-3 Block IIA and SM-6 surface-to-air missiles, enabling defense against both air-breathing and ballistic-missile threats.