TOKYO -- Japan's Defense Ministry plans to expand and upgrade its fleet of Aegis-equipped destroyers with a system that will vastly enhance its effectiveness against missile attack.
Under the ministry's plan, two destroyers will be built with an upgraded version of the Aegis Ballistic Missile Defense system that is capable of shooting down high-altitude ballistic missiles and low-altitude anti-ship missiles simultaneously. Two existing destroyers will be retrofitted with the system.
