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25DD Multipurpose Destroyer

Fuyuduki was the last of her class - the next will be a simplified version said to have only half the VLS capacity(16 cells) geared towards ASuW and ASW. 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) until 2017.

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.




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