JS ''Isoyuki'' (DD-127) was a ''Hatsuyuki''-class

destroyer In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against powerful short range attackers. They were originally developed in ...

of the

Japanese Maritime Self-Defense Force , abbreviated , also simply known as the Japanese Navy, is the maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese Navy (IJN) ...

Development and design

Adopting Japan's first all-gas turbine engine (

COGOG Combined gas or gas (COGOG) is a propulsion system for ships using gas turbine engines. A high efficiency, low output turbine is used for cruising speeds with a high output turbine being used for high-speed operations. A clutch allows either turb ...

), equipped with well-balanced weapons such as helicopters, C4I systems, and various missiles, it is inferior to Western frigate at that time. It has been evaluated as a non-escort ship. Twelve ships were built as first-generation general-purpose escort vessels in the era of eight ships and eight aircraft, they supported the escort fleet for a long time, but now they are gradually retiring due to aging. In addition, there are many changes to training ships, and up to three ships have been operated in the training fleet as Shimayuki-class training ships, but the decline has begun with the conversion of Hatakaze-class destroyers to training ships. The core of the combat system is the OYQ-5 Tactical Data Processing System (TDPS), composed of one

AN/UYK-20 The AN/UYK-20 "Data Processing Set" was a ruggedized small computer manufactured by Univac and used by the United States Navy for small and medium-sized shipboard and shore systems built in the 1970s. It featured non-volatile magnetic core memory ...

computer and five OJ-194B

workstation A workstation is a special computer designed for technical or scientific applications. Intended primarily to be used by a single user, they are commonly connected to a local area network and run multi-user operating systems. The term ''workstat ...

s and capable of receiving data automatically from other ships via Link-14 ( STANAG 5514). This is the first destroyer class in the JMSDF equipped with the Sea Sparrow Improved basic point defense missile system. The IBPDMS of this class uses

FCS-2 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-cal ...

fire-control system A fire-control system (FCS) is a number of components working together, usually a gun data computer, a director, and radar, which is designed to assist a ranged weapon system to target, track, and hit a target. It performs the same task as a ...

s of Japanese make and one octuple launcher at the afterdeck. And in the JMSDF, OTO Melara 76 mm compact gun and Boeing Harpoon surface-to-surface missile are adopted from the ship of FY1977 including this class. Also, ships built in FY1979 and beyond carried Phalanx CIWS and were retrofitted to previous ships.

Construction and career

She was

laid down Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one o ...

on 20 April 1982 and launched on 19 September 1983 at IHI Corporation in

Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 ...

. She commissioned on 23 January 1985. In 1986, she participated in Exercise RIMPAC 1986. In 1990, she participated in Exercise RIMPAC 1990. On March 13, 2014, she was removed from the register due to the commissioning of

JS Suzutsuki JS ''Suzutsuki'' (DD-117) is the third ship of Akizuki-class destroyers, operated by the Japan Maritime Self-Defense Force. She was commissioned on 12 March 2014. Construction and career ''Suzutsuki'' was laid down on May 18, 2011 at Mitsubis ...

. The final affiliation was the 13th escort fleet of the escort fleet, and the homeport was

Sasebo is a core city located in Nagasaki Prefecture, Japan. It is also the second largest city in Nagasaki Prefecture, after its capital, Nagasaki. On 1 June 2019, the city had an estimated population of 247,739 and a population density of 581 persons p ...

. After that, on July 23, the same year, it was circulated to the JMU Maizuru Works, remodeled the ship, and painted white, which seems to be for aiming and measurement. In November 2015, she was sold for scrap and departed from Maizuru to be dismantled.

Gallery

File:JS Isoyuki (DD-127), -10 Oct. 1988 a.jpg, JS ''Isoyuki'' underway on 10 October 1988. File:JS Isoyuki at Sasebo, -30 Apr. 2011 a.jpg, JS ''Isoyuki'' at

on 30 April 2011. File:JS Isoyuki at Sasebo, -30 Apr. 2011 b.jpg, JS ''Isoyuki'' at

on 30 April 2011. File:JS Isoyuki(DD-127) left side view at JMU Maizuru Shipyard July 27, 2014.jpg, JS ''Isoyuki'' at JMU Maizuru Shipyard on 27 July 2014. File:JS Isoyuki(DD-127) left rear view at JMU Maizuru Shipyard July 27, 2014.jpg, JS ''Isoyuki'' at JMU Maizuru Shipyard on 27 July 2014. File:Retired JS ISOYUKI DD-127.jpg, JS ''Isoyuki'' docked on 4 July 2015.

References

{{DEFAULTSORT:Isoyuki 1983 ships Ships built by IHI Corporation Hatsuyuki-class destroyers