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.

The broadband SATCOM system of this class can relay video data from helicopters to the ground station or the HQ of the JCG.