Aso-class patrol vessel
 Aso class patrol vessel is a class of PL type patrol vessel of the Japan Coast Guard. PL stands for Patrol vessel Large and the class name Aso is named after Mount Asothe largest active volcano in Japan.This class is one of the new patrol vessel classes to intercept spy boats of DPRK. These classes are called 高速高機能大型巡視船 High-speed high-functionality patrol vessel large.