The Phalanx CIWS is a close-in weapon system for defense against incoming threats such as small boats, surface torpedoes, anti-ship missiles and helicopters. It was designed and manufactured by the General Dynamics Corporation, Pomona Division, later a part of Raytheon. Consisting of a radar-guided 20 mm (0.8 in) Vulcan cannon mounted on a swiveling base, the Phalanx has been used by the United States Navy and the naval forces of 15 other countries. The US Navy deploys it on every class of surface combat ship, except the Zumwalt-class destroyer and San Antonio-class amphibious transport dock. Other users include the British Royal Navy, the Royal Australian Navy, the Royal New Zealand Navy, the Royal Canadian Navy and the US Coast Guard.
The Kongō class of guided missile destroyers in the Japan Maritime Self-Defense Force are equipped with the Aegis Combat System, and is the first of few ship classes outside the United States to have that capability. Following a decision made in December 2003, Japan is upgrading their Kongo-class destroyers with Aegis Ballistic Missile Defense System. The upgrade involves a series of installations and flight tests to take place from 2007 to 2010. JS Kongo was the first ship to have the BMD upgrade installed.
The Atago class of guided missile destroyers in the Japan Maritime Self-Defense Force is a modified version of the Kongō class equipped with the Aegis Combat System.
The Haruna-class destroyer was a destroyer class built for the Japan Maritime Self-Defense Force (JMSDF) in the early 1970s. These helicopter carrying destroyers (DDH) are built around a large central hangar which houses up to three helicopters.
The Tachikaze-class destroyer is a second generation guided missile destroyer class, formerly in service with the Japan Maritime Self-Defense Force (JMSDF). The ships of this class have had successive improvements after their completion, especially to their C4I systems. These air-defense warships are the natural successor to the first generation air-defense ship, the Amatsukaze-class destroyer, and they were in turn, followed by newer air-defense ships, the Hatakaze class.
The Hatsuyuki-class destroyer is a class of destroyer, serving with the Japan Maritime Self-Defense Force (JMSDF). It was the first class of first generation of general-purpose destroyers of the JMSDF.
The Harukaze-class destroyer was the first indigenous post-World War II Japanese destroyer class. Its main mission was anti-submarine warfare.
The Ayanami class was a destroyer class built for the Japan Maritime Self-Defense Force (JMSDF) in the late 1950s. The primary purpose was anti-submarine warfare, so this class was classified as "DDK" unofficially.
The Murasame-class destroyer was a destroyer class built for the Japan Maritime Self-Defense Force (JMSDF) in the late 1950s as a successor to the Ayanami-class destroyers. Like its predecessor, its main task was anti-submarine warfare, but its improved weaponry also enabled it to perform better in the anti-air role, so this class was classified as "DDA" unofficially.
The Ikazuchi-class destroyer escort was a destroyer escort class built for the Coastal Safety Force in the late 1950s.
The Isuzu class destroyer escort was a destroyer escort class built for the Japan Maritime Self-Defense Force (JMSDF) in the early 1960s. The latter batch were quite different from the earlier two vessels in their propulsion and weaponry, so sometimes they were classified as the "Kitakami-class".
JS Ishikari (DE-226) was the first destroyer escort with a gas turbine engine and surface-to-surface missiles of the Japanese Maritime Self-Defense Force. She is the successor of the earlier Chikugo class. Entering service in 1981, she remained active until 2007 when she was decommissioned.
The Chikugo-class destroyer escort was a class of destroyer escorts built by the Japanese Maritime Self-Defense Force as the successor of the Isuzu class, with the same ASW mission. This class was followed by JDS Ishikari. This is the first Japanese destroyer escort class to carry ASROC anti-submarine missiles.
Type 81 Fire Control System (FCS-2) is a Japanese shipboard gun and missile fire-control system. This series of systems has been installed on destroyers of the Japan Maritime Self-Defense Force built between FY1977 and FY2001 to control medium-caliber guns and Sea Sparrow missiles, including ESSM.
JS Hatsuyuki (DD-122) was the lead ship of the Hatsuyuki-class destroyers.
The Maya class of guided missile destroyers in the Japan Maritime Self-Defense Force is a modified version of the Atago class, with an updated Aegis Combat System and electric propulsion system. Maya was commissioned on March 19, 2020. Haguro was commissioned on March 19, 2021.
JDS Ikazuchi (DE-202) is the lead ship of Ikazuchi-class destroyer escort of Japan Maritime Self-Defense Force.
JDS Inazuma (DE-203) is the second ship of the Ikazuchi-class destroyer escorts of the Japan Maritime Self-Defense Force (JMSDF).
JDS Isuzu (DE-211) is the lead ship of the Isuzu-class destroyer escorts of the Japan Maritime Self-Defense Force (JMSDF).
JDS Mogami (DE-212) is the second ship of Isuzu-class destroyer escort of Japan Maritime Self-Defense Force (JMSDF).
Japan Maritime Self-Defense Force 
