Naval Tactical Data System
At the beginning, equipment of this class were similar to those of the DDA. All weapons, two 5-inch/54 caliber Mark 42 (Type 73) guns and one Type 74 octuple missile launcher (Japanese version of the American Mark 16 GMLS), were settled on the forecastle deck. But with the Fleet Rehabilitation and Modernization (FRAM) program in 1983 and 1984, Sea Sparrow launchers, Phalanx CIWS systems and chaff launchers were added on the superstructure. With this upgrading program, this class became also enable to operate Naval Tactical Data System (NTDS) with OYQ-6/7 combat direction system.