Reuters is reporting that Japan has picked Lockheed Martin’s Long Range Discrimination Radar (LRDR) over Raytheon’s SPY-6 as the primary sensor for both its Aegis Ashore installations.
By Commander, U.S. Naval Forces Europe-Africa/U.S. 6th Fleet (Aegis Ashore Missile Defense Complex Romania) [Public domain], via Wikimedia Commons
Reuters says the LRDR was selected due to its search capabilities and lifecycle costs.