Asahi-class 25DD Multipurpose Destroyer
Fuyuduki was the last of her class - the next was a simplified version to have only half the VLS capacity(16 cells) geared towards ASuW and ASW. The 5,100-ton general-purpose escort destroyers were previously designated as 25DD and are designed on the basis of Akizuki-class destroyers but with a focus on anti-submarine instead of anti-air warfare.
The 25DD class destroyer is a new 5,000-ton [light] destroyer program first revealed in the MoD's FY2013 budget request, DD-119 and a second in FY2014, DD-120. The design is an ASW optimised development of the Akizuki class intended for sea lines of communication duties rather than the escort of Aegis destroyers as in the case of the Akizuki. It is planned to cost less to operate and maintain than the already low cost Akizuki class, partly through the use of COGLAG [Combined Gas turbine Electric And Gas turbine] propulsion. a total of ¥72.3 billion has been requested for the construction of the first unit in the class, and to respond to a reduction of Hatsuyuki-class destroyers).
The 5000t DD will be equipped with Mk.41 VLS - 16 cells - , 2 quadpack SSM launchers loaded with type 90 SSM, 2 tripack torpedo launchers loaded with type 12 short torpedoes and 1 5-inch cannon. It looks as if she is not equipped with a Phalanx type CIWS and relies on ESSM as coverage. Her power train will be a COGLAG to reduce life cycle cost and probably reduce noise to make it a better sub hunter. The next 5000t DD are/will be suited with a new OQQ-22 integrated sonar suite sub-system (hull-sonar and OQR-3 towed array; - a Japanese equivalent of the American AN/SQQ-89), and the NOLQ-3D digitalized EW suite sub-system. These sub-systems communicate across a NOYQ-1B wide area network. In totality these systems are comparable to those of the Zumwalt class destroyer.
Japan makes a technical demarcation between high-tonnage destroyers (DDG) and mid-tonnage destroyers. Aside from physical weight, when opponents have a known preference for surface anti-shipping and reliance on theater ballistic missile capabilities, such as Soviet Union and now China, a large bank of missile cells, a more powerful radar, and additional command and control decks on a bigger hull are going to matter (Kongo and Atago are 2 decks higher than AB Flight I and AB Flight IIA). Their bigger destroyers that have DDG tag on them fit this role.
Mid-size destroyers (DD) are different: they are leaner and more fuel-efficient, can stay longer on station and cover more area for the same fuel replenishment, and thus are highly effective for anti-submarine warfare. JMSDF's large fleet of mid-size destroyers (from Abukuma DE to Akizuki DD) coupled with their sophisticated aviation is what has permitted the service to remain the most capable ASW fleet in the world after US Navy. These destroyers earn the DD tag at middle displacements; DE in low displacements.
The FY2013 budget funded one new class of destroyer, which has better fuel efficiency and ability to detect targets in the water. Japan will build two of these destroyers (25DD/26DD) by 2017. The unit price of the name ship was 70.1 billion yen. The unit price of the 2nd ship was 72.9 billion yen.
During the period 2012-2014, JMSDF launched four new Akizuki-class destroyers. These are not large vessels (displacement of about 6,800 tons), but there are the most modern electronic equipment. Their mission is to detect low flying targets. The introduction of these ships into combat completed the plan to establish a peripheral air defense line of Japanese air defense units. In this scheme these destroyers are supporting more advanced Kongo and Atago class destroyers, which are equipped with the Aegis system. No other country has such a system, even the US Navy.
In August 2015, Japan launched a new Asahi-class destroyer. The first unit of the class, called JDS Asahi (DD-119), was launched in October 2016. March 2018, JDS Asahi (DD-119) was expected to be put into service of JMSDF. Asahi's appearance was a surprise even for those who watched the shipbuilding work all over the world. Previously there were only very unclear rumors about JMSDF designing 2 new destroyer series - DD25 project and the promising project DD27, the DD27 project ships will combine the use of conventional weapons with those Weapons are built according to new physical principles. There is no information about specific features and the number of ships being built.
On 19 October 2016, Mitsubishi Heavy Industries opened the naming and launching ceremony for the defense ministry for the first time in four years at the Nagasaki Shipyard. The first ship of the new 5000 ton type escort ship was named "Asahi" and slowly slid down from the ship of the factory, which used to be a battleship Musashi. Asahi's name means "sunrise", a metaphor extended to refer to Japan. Among Mitsubishi Heavy Industries, which reforms the shipbuilding business, the Kagoshiri factory of the Nagasaki Shipyard is the mainstay gas carrier. On the other hand, the factory has begun construction of the second ship of the 5000 ton type escort ship, and it will maintain production with a ship to be delivered to the Ministry of Defense.
Shiranui (lit. "unknown fire") is a Japanese term given to the optical or supernatural phenomenon similar to will-o'-the-wisp. Three destroyers of Japan have been named Shiranui. Japanese destroyer Shiranui (1899) was a Murakumo-class destroyer of the Imperial Japanese Navy during the Russo-Japanese War. Shiranui (1938) was the second vessel to be commissioned in the 19-vessel Kagero-class destroyers built for the Imperial Japanese Navy in the late-1930s. The third JS Shiranui is the Asahi-class destroyer launched in 2017. The ship is built on the basis of the hull of the previous series of destroyers 19DD “Akizuki”, however, the superstructure has some differences associated with the installation of new radars with receiving and transmitting modules based on gallium nitride. Instead of the American hydroacoustic complex AN / SQQ-89, produced under license, the hydroacoustic complex OQQ-24 of its own design is installed. The power plant gas turbine with electric transmission.
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