Hyuga Class helicopter destroyers are in service with the Japanese Maritime Self Defence Force (JMSDF). IHI Marine United custom built two Hyuga Class ships at the Yokohama shipyard, for the JMSDF.
The keel for the lead ship in class, JDS Hyuga (DDH181), was laid down in March 2006. It was launched in August 2007. The ship was commissioned at Yokosuka port in Japan on 18 March 2009.
The second ship, JDS Ise (DDH182), was laid down in May 2008 and launched in August 2009. It was commissioned into service in March 2011.
JDS Hyuga is based in Yokosuka, serving as the flagship for the First Escort Flotilla. Among other unique aspects, the DDH181 is the first JMSDF destroyer to have female crew members on board. JDS Ise is homeported at Kure.
The Hyuga Class destroyers are a new type of helicopter destroyer (DDH). Hyuga Class replaced the existing 7,000t Haruna Class destroyers.
The ship is part of the 16DDH project; the name is derived from the 16th year of the Heisei reign in the Japanese calendar. Hyuga was one of the Japanese Imperial Navy’s battleships that were converted into hybrid battleships / aircraft carriers in 1943.
Two additional 19,500t class destroyer (DDH) ships are planned, while the first ship is under construction. These new ships will become the largest combat ships operated by Japan after the end of the Imperial Japanese Navy. The ship’s design bears a resemblance to an aircraft carrier or an amphibious assault ship.
Hyuga is similar in design to a light aircraft carrier. It has a through-deck design to maximise potential space, enabling it to launch and retrieve the helicopter complement. It cannot act as a fixed wing aircraft as it is not fitted with a ski-jump or any other equipment.
The ships use the helicopters on board for their primary mission of conducting anti-submarine activities. Serving as flagships for the JMSDF is on the agenda, command-and-control function is also in place.
The Hyuga is a 197m-long, 13,950t flat-deck vessel that can carry up to four helicopters on deck and operate 11 SH-60K type helicopters. The ship has a crew of 340 sailors and can only carry helicopters. As Japan was restricted under the pacifist constitution, it cannot possess offensive aircraft carriers.
Equipped with 16 mk41 vertical-launch system cells for anti-aircraft and anti-ship missiles, Hyuga accommodates two 20mm Phalanx anti-missile cannons and two triple 12.75in torpedo mounts for self defence.
The helicopter carriers are powered by combined gas turbine and gas (COGAG) propulsion. They are fitted with four General Electric LM2500 gas turbines, developing 25,000hp each. The propulsion system provides a maximum speed of 30kt.
The ship is an important part of the 16DDH project. The warship looks like an aircraft carrier with a flattop deck, but is a helicopter carrier. It is not classified as an aircraft carrier. More than four helicopters can take off and land concurrently.
The Hyuga has two aircraft lifts, an enclosed hangar and is able to carry up to 11 helicopters. In terms of its size, it is comparable to modern small aircraft carriers, such as Italy’s MM Giuseppe Garibaldi, Spain’s Principe de Asturia and Britain’s Invincible.
Hyuga is one of the largest warships built for the JMSDF and has given Japan its first real power projection capability since 1945.
The vessel could also be instrumental for disaster recovery missions in the region, prone to earthquakes, floods, tsunamis and typhoons. The new vessel was unveiled on 11 April 2009.
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