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JS Maya
Class overview
Name	Maya class
Builders	Japan Marine United
Operators	Japan Maritime Self Defense Force
Preceded by	Atago class
Succeeded by	Aegis system equipped vessels (ASEV)
Cost	¥164.8 billion
Built	2017–2021
In commission	2020–
Planned	2
Completed	2
Active	２
General characteristics
Type	Guided-missile destroyer
Displacement	8,200 tons standard 10,250 tons full load
Length	170 m (557 ft 9 in)
Beam	21 m (68 ft 11 in)
Draft	6.4 m (21 ft 0 in)
Depth	12 m (39 ft 4 in)
Propulsion	2 × IHI/GE LM2500-30 gas turbines as main engines 2 × KHI M7A-05 gas turbines for generators 2 × diesel engines for generators 2 × electric motors Two shafts 5-bladed CP props 68,010 shp (50,720 kW)
Speed	approx. 30 knots (56 km/h)
Boats & landing craft carried	2 × working boat 1 × Rigid hull inflatable boat
Complement	300
Sensors and processing systems	AN/SPY-1D(V) multi-function radar AN/SPQ-9B surface search radar 3 × AN/SPG-62 illuminators AN/SQQ-89 with SQS-53C Mk 46 Optical Sight System
Electronic warfare & decoys	NOLQ-2C intercept 4 × Mk 137 chaff and decoy launchers
Armament	1 × 5-inch (127 mm)/62 Mk 45 Mod 4 gun 8 × Type 17 anti-ship missiles in quad canisters 2 × 20 mm Phalanx CIWS 2 × HOS-303 triple torpedo tubes: Mark 46 torpedo Type 97 / Type 12 torpedoes 1 × 64-cell, 1 × 32-cell (96 total cells) Mk 41 Vertical Launching System: SM-2MR surface-to-air missile SM-3 anti-ballistic missile SM-6 surface-to-air missile Type 07 VL-ASROC RIM-162 ESSM
Aircraft carried	1 × SH-60K helicopter
Aviation facilities	Flight deck and enclosed hangar for one helicopter

The Maya class of guided-missile destroyers (まや型護衛艦, Maya-gata Goeikan) 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.

Background

The Maritime Self-Defense Force (MSDF) began construction of the Aegis-equipped Kongō class in FY1988. In FY2002 and 2003, a modified version, Atago class, was also added for its fleet.

However, even after the four Kongō-class and two Atago-class destroyers had been commissioned, it was still necessary to build two more Aegis-equipped destroyers to replace Hatakaze class, the best and last survivor of Tartar-equipped destroyers. The construction of these two Aegis-equipped destroyers was included in the National Defense Program Guidelines for FY2014 and beyond. The first ship, JS Maya, was built in the FY2015 budget.

Design

While it shares the same design characteristics as the Atago class, the Maya class possesses a larger hull to install a hybrid-electric propulsion system.

Maya-class destroyers are engineered with a COGLAG (Combined Gas turbine-eLectric And Gas turbine) propulsion system, a modification of the combined gas and gas propulsion system employing electric propulsion for low-speed cruising. The JMSDF had been testing a COGLAG propulsion system on JS Asuka. Then, the adoption of the system for surface combatants began with the Asahi class. While the Asahi class system had a low voltage distribution of 450 volts, the Maya class system is equipped with a more advanced system that can handle a high voltage distribution of 6,600 volts.

The JMSDF already uses an integrated electric propulsion system for auxiliary vessels and is expected to expand to surface combatant ships in the future in light of its future weapon accommodation.

Equipment

The Maya class features the newer Aegis Weapon System (AWS) Baseline 9C (referred to as J7 in Japan), compared with the Atago class using the Baseline 7 system (now being updated to Baseline 9C with modernization). With this system, these destroyers are equipped with the Cooperative Engagement Capability (CEC) system. This will allow the ship to share surveillance or targeting information with other CEC-equipped assets, such as ships from the American or Australian Navy or from American or Japanese E-2 Hawkeyes. In addition to the AWS, they are also equipped with an Aegis BMD 5.1 system; they are the first JMSDF Aegis vessels to be capable of ballistic missile defense (BMD) from the time of its commissioning.

In addition to the existing SM-2MR Block IIIB surface-to-air missiles, the SM-6 will also be installed in the future. The SM-6 missiles can be networked to the CEC system and thus allow it to receive targeting information from other CEC-equipped sources. While the primary role of the SM-6 is to intercept enemy aircraft and cruise missiles, the SM-6 is also capable of intercepting ballistic missiles in their terminal phase and can double as an anti-ship missile.

As for anti-ballistic missiles, these ships are equipped with the SM-3 Block IA, IB, and IIA. The SM-3 Block IIA is the latest variant of the SM-3 missiles, being re-designed drastically to defend broader areas.

The ship will use Type 17 ship-to-ship missiles (SSM-2) in addition to an existing Type 90 (SSM-1B). As for lightweight torpedoes, the HOS-303 torpedo tubes were adopted for this class; this is contrary to the HOS-302 tubes that were used until the Atago class.

Future armaments for the ships are slated to include a locally built railgun and a laser point-defense system.

Operational history

On 16 November 2022, the guided-missile destroyer Maya fired an SM-3 Block IIA missile, successfully intercepting the target outside the atmosphere in the first launch of the missile from a Japanese warship. On 18 November 2022, the Haguro likewise fired an SM-3 Block IB missile with a successful hit outside the atmosphere. Both test firings were conducted at the Pacific Missile Range Facility on Kauai Island, Hawaii, in cooperation with the U.S. Navy and U.S. Missile Defense Agency. This was the first time the two ships conducted SM-3 firings at the same time, and the tests validated the ballistic missile defense capabilities of Japan’s newest Maya-class destroyers.

Ships in the class

Namesakes

Maya shares her name with the World War II era Japanese Takao-class heavy cruiser Maya, while Haguro shares her name with Myōkō-class heavy cruiser Haguro.

References

1. REIJI YOSHIDA (30 July 2018). "Japan launches next-generation destroyer carrying latest version of the Aegis anti-missile system". Retrieved 30 July 2018 – via Japan Times Online.
2. ^ Tokumaru 2021.
3. ^ Tokumaru 2018.
4. ^ Inaba 2020.
5. ^ Yamazaki 2014.
6. "Lockheed Martin gets $135m contract for Aegis Baseline 9 deliveries to Japan". Naval Today. 18 December 2017. Retrieved 10 January 2019.
7. ^ Rimland 2018.
8. Takahashi, Kosuke (3 September 2018). "Japan's Improved Atago-class to field SM-6 air-defence missiles". Jane's. Retrieved 10 January 2019.
9. "Japan Defense Ministry Unveiled Details of "27DD" Class Railgun & Laser armed AEGIS Destroyer". Navy Recognition. 22 July 2015. Retrieved 8 January 2019.
10. Mahadzir, Dzirhan (November 21, 2022). "Two Japanese Destroyers Score in Ballistic Missile Defense Test off Hawaii". News Blog. United States Naval Institute. Retrieved November 22, 2022.
11. "海自護衛艦「まや」進水 イージス艦７隻目、「共同交戦能力」初搭載 情報共有で屈指の防空能力" (in Japanese). Sankei Shimbun. 30 July 2018. Retrieved 31 July 2018.
12. Xavier Vavasseur (17 July 2019). "JMU Launches 'Haguro' - Second Maya-Class AEGIS Destroyer For The JMSDF". Naval News. Retrieved 17 July 2019.

Bibliography

• Inaba, Yoshihiro (13 May 2020). "JMSDF To Put Its Latest Aegis Destroyer JS Maya Through Its Paces". Naval News.
• Rimland, Ben (1 August 2018). "Japan Launches Future Aegis Destroyer JS Maya". Navy Recognition.
• Tokumaru, Shinichi (December 2018). "Air defense system of new JMSDF DDG Maya". Ships of the World (in Japanese) (889). Kaijin-sha: 53–57. NAID 40021712920.
• Tokumaru, Shinichi (May 2021). "Mechanism of JMSDF's AEGIS Destroyers - Weapon System". Ships of the World (in Japanese) (947). Kaijin-sha: 88–97.
• Yamazaki, Makoto (August 2014). "Development of Japanese DDG". Ships of the World (in Japanese) (802). Kaijin-sha: 69–75. NAID 40020135975.

• Destroyer classes
• Ships built by Japan Marine United
• Maya-class destroyers