The class is one of the more modern patrol vessel classes designed to intercept spy boats of the DPRK. These classes are referred to as "High-speed, high-functionality patrol vessel, large" (高速高機能大型巡視船). The vessels carry a Bofors 40 mm L/70 autocannon with a laser-optical fire-control system, and are able to safely deal with heavily armed spy boats of the DPRK which intrude into Japanese waters. The hull of this class is bulletproof in cases of close-range firefights using small arms.
Ships of this class are among the leading vessels of flotillas intended for spy boat interception. With the helicopter deck of this class, a Special Security Team can arrive at the scene aboard Eurocopter EC225 helicopters. The broadbandSATCOM system of this class can relay video data from helicopters to the ground station or the HQ of the JCG. This class is equipped with @ LIDAR system to acquire targets with high accuracy, and at the same time, this system enables them to perform search and rescue mission more safely.