Asagiri class: http://www.globalsecurity.org/military/world/japan/asagiri.htm
The class is well suited for anti-submarine work with, ASROC, Type 68 ASW torpedoes, a SH-60J ASW helicopter, towed tactical passive sonar array and Mitsubishi OQS-4A bow mounted medium frequency sonar (an improved version of the US SQS-23). In addition, they carry 8 RGM-84C Harpoon SSM, a Mk 29 Sea Sparrow missile launcher (18 missiles can be carried), 2 20 mm Mk 15 Phalanx CIWS, one 76-mm 62 cal. OTO Breda Compact gun, Mk 36 SRBOC decoy systems and the U.S. SLQ-25 Nixie acoustic torpedo system. It includes the LINK 11 and the LINK 14 communications systems. As for the direction control system, the OYQ-5 digital communication system exchanges strategy data with the helicopter. In addition, after the fifth warship the OPS-4c three dimensional air search radar was replaced by the OPS-24. All this on a length of 449 ft, max beam of 48 feet, 4,300 tons full load, quite a punch for a vessel this size.
The class is powered by 4 Kawasaki-Rolls-Royce Spey SM-1A gas turbines, generating 53,900 shaft horsepower to two controllable pitch propellers. As to the MIA gas turbine Auxiliary Generating Engine which was originally developed by KHI, one set of MIA-02 type gas turbine (1,000kW) is installed on each "Hatsuyuki" type DD vessel (total 12 ships), two sets are installed on each "Asagiri" type DD vessel (total 8 ships), and one set is installed on each "Abukuma" type DE vessel (total 6 ships).
Specifications
Plan 1981 mid-term defense estimate
Standard Displacement 3,500ton
3,550ton (DD155-158)
Boundary Dimension Length: 137m
Width: 14.6m
Depth: 8.8m
Draft: 4.4m / 4.5m (DD155-158)
Boat Shape Long forecastle type
Main Engine Kawasaki Rolls Royce Spey SM1A Gas turbine x4; COGAG, 2 shafts propulsion
Horsepower 54,000ps
Maximum Speed 30kt
Crew 220
Gun 76mm 62cal rapid fire gun x1
20mm Close-In Weapons System (CIWS) x2
Anti-aircraft Armament Short-range SAM Sea Sparrow
Anti-warship Armament SSM Harpoon
Anti-submarine Armament ASROC launcher x1
Torpedo Armament Type 68 Triple torpedo tubes x2
Fire Control FCS- 2-12E (DD151-154)
FCS- 2-12G (DD155-158)
Air Search Radar OPS-14 (DD151-154)
OPS-24 (DD155-158)
Surface Search Radar OPS-28
Sonar Mitsubishi OQS 4A (II) hull
ECM OLT-3
Decoy Loral Hycor SRBOC 6-barrelled (Mk36) x2
SLQ-51 Nixie x1, or Type 4 towed anti-torpedo decoy
Aircraft SH-60J anti-submarine helicopter x1
saludos