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Author: Subject: JAPANESE Navy, 2017 onwards
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[*] posted on 23-8-2019 at 04:54 PM


US Fighter Jets Eyed As First Users of Retrofitted Izumo Carrier (excerpt)

(Source: The Asahi Shimbun; published August 21, 2019)

By Takateru Doi

The Japanese government has been caught in a lie over its plans to retrofit the Izumo destroyer and effectively transform the vessel into an aircraft carrier.

Officials initially presented the project as simply one that would strengthen the nation's ability to defend outlying islands and secure the safety of Self-Defense Force pilots by reducing their flight times.

When Defense Minister Takeshi Iwaya was asked by opposition lawmakers in March if U.S. fighter jets would be allowed to use the Izumo, he stated that only if the aircraft had no closer landing points while flying out at sea.

It now turns out that Japanese officials then informed their U.S. counterparts that U.S. fighter jets would likely be the first to use the Izumo for landings and take-offs.

Improvements to the Izumo deck and other measures to allow aircraft to land and take off from the ship will finish in fiscal 2020. Another MSDF destroyer, the Kaga, will also be retrofitted, with plans calling for completion in fiscal 2022.

The government has also approved a plan to purchase U.S.-made F-35B fighter jets which have short take-off and vertical landing capabilities. The F-35B jets will be mainly used on the Izumo and Kaga, but the aircraft will not be deployed until after fiscal 2024.

That leaves open the possibility of at least a three-year period when the Izumo would be capable of being used as an aircraft carrier, but with the Air SDF having no such aircraft in its arsenal. (end of excerpt)

Click here for the full story, on the Asahi Shimbun website.

http://www.asahi.com/ajw/articles/AJ201908210022.html

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[*] posted on 5-10-2019 at 11:40 AM


US Department of State approves potential sale of follow-on support for JMSDF’s Aegis-equipped destroyers

Gabriel Dominguez, London - Jane's Defence Weekly

04 October 2019

The US Department of State has approved a potential USD140 million Foreign Military Sale (FMS) of follow-on technical support (FOTS) sustainment and services for the Japan Maritime Self-Defense Force's (JMSDF's) eight Aegis-equipped destroyers, the US Defense Security Cooperation Agency (DSCA) announced on 1 October.

The Japanese government had requested FOTS sustainment and services in support of the JMSDF's four Kongo-, two Atago-, and two Maya-class guided-missile destroyers, said the DSCA, adding that the potential sale, which still needs to be approved by the US Congress, also includes one Japanese Computer Test Site (JCPTS).

The DSCA said that the proposed sale is "critical" to ensure that the JMSDF's Aegis destroyer fleet and the JCPTS "remain ready to provide critical capabilities in the defence of Japan".

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[*] posted on 7-11-2019 at 09:12 AM


Japan launches second Soryu-class submarine equipped with lithium-ion batteries

Kosuke Takahashi, Tokyo and Gabriel Dominguez, London - Jane's Defence Weekly

06 November 2019


KHI launched on 6 November the 12th and final Soryu-class SSK on order for the JMSDF. The boat is also the second of the class to be equipped with lithium-ion batteries. Source: KHI

Japan's Kawasaki Heavy Industries (KHI) has launched the second Soryu-class diesel-electric attack submarine (SSK) for the Japan Maritime Self-Defense Force (JMSDF) equipped with lithium-ion batteries.

The 84 m-long boat, which has been named Toryu (with pennant number SS 512), entered the water on 6 November in a ceremony held at KHI's facilities in Kobe.

Toryu is also the 12th and final submarine of the Soryu class and the sixth to be built by KHI, with the other six having been built by Mitsubishi Heavy Industries (MHI). The boat was laid down in January 2017 and is expected to enter service with the JMSDF in March 2021.

The launch comes after GS Yuasa, a Kyoto-based developer and manufacturer of battery systems, announced in February 2017 that Japan would become the first country in the world to equip SSKs with lithium-ion batteries in place of lead-acid batteries.

At the time the company said the batteries, which store considerably more energy than the lead-acid batteries, would be mounted on the final two Soryu-class boats for the JMSDF: SS 511 ( Oryu ), and SS 512 ( Toryu ).

According to Jane's Fighting Ships , the Soryu class has a beam of 9.1 m, a hull draught of 8.4 m, and a displacement of 2,947 tonnes when surfaced and of 4,100 tonnes when submerged.

The previous boats of the class have been fitted with two Kawasaki 12V 25/25 diesel generators and four Kawasaki Kockums V4-275R Stirling air-independent propulsion (AIP) engines, and use lead-acid batteries for energy storage.

Each of the platforms has a top speed of 20 kt when submerged and of 12 kt when surfaced.

The Soryu class is equipped with six 533 mm bow tubes that can fire the Japanese-developed Type 89 heavy-weight torpedo. The boats are also capable of deploying the UGM-84C Harpoon medium-range anti-ship missile against surface targets.

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[*] posted on 7-11-2019 at 12:16 PM


God help them if a Li-Io battery catches fire...they won't be putting it out with hoses and halon.



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[*] posted on 7-11-2019 at 03:33 PM


Not all lithium-ion batteries are thermally dangerous or toxic, lithium iron-phosphate batteries don't suffer from thermal runaway and it's matrix is a rock mineral that's non-toxic if damaged and breathed. The lithium stays bound within the molecule. It also has a fast recharge speed in tens of minutes, as opposed to hours, but still does not over heat or degrade. Plus delivers an almost constant discharge rate until it is drained. It's also less prone to performance loss from over-discharging and repeated partial charging.

Consumer batteries commonly use thermal-runaway dangerous types of Li-ion because they have a higher energy density per unit volume and weight, plus generally cost a bit less. Though of late the cost is little different. You can bet the sub's Li battery is lithium iron-phosphate based. (LiFePO4)
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[*] posted on 14-11-2019 at 09:35 AM


Japanese Navy May Have Gained Tactical Edge with New Submarine (excerpt)

(Source: Forbes Magazine; posted Nov 12, 2019)

By H I Sutton

In a ceremony on November 6, Japan launched its latest submarine, the Toryu, its second to be equipped with lithium-ion batteries. Japan is the first country to field this game-changing technology in submarines.

So, what is the big deal? We are familiar with lithium-ion batteries in our smartphones, laptops and other consumer goods. They have a higher power-density than traditional batteries, and they can be made smaller and in novel shapes which better fit the space given to them. Yet the submarine community has been slow to adopt this technology.

This is for good reason. As we know from Samsung's woes with the Galaxy Note 7, lithium-ion batteries are prone to catching fire. Battery fires aboard submarines can quickly turn lethal. Recently 14 elite Russian submariners lost their lives due to a fire in the battery compartment of their submarine. Those were traditional, safer, lead-acid batteries. Japan must have found a way to make lithium-ion batteries safe enough to send to sea.

The first 10 Soryu class boats used traditional heavy-duty acid batteries like almost every other submarine in the world. Even nuclear submarines have a bank of lead-acid batteries as back up.

But the Japanese submarines also have an Air-Independent Power (AIP) system. This uses closed-cycle ‘Stirling’ diesel engines to generate electricity to turn the propeller while the submarine is submerged. This means that submarines can patrol longer without surfacing, thus preserving their stealth. AIP is itself seen as cutting-edge technology so it's telling that Japan has stepped beyond this with lithium-ion batteries. (end of excerpt)

Click here for the full story, on the Forbes Magazine website.

https://www.forbes.com/sites/hisutton/2019/11/12/japanese-na...

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[*] posted on 14-11-2019 at 06:23 PM


‘Cutting edge’... Yeah, the first Stirling engine was created in 1816...

Gentleman ‘the state of modern journalism...’




In a low speed post-merge manoeuvring fight, with a high off-boresight 4th generation missile and Helmet Mounted Display, the Super Hornet will be a very difficult opponent for any current Russian fighter, even the Su-27/30
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[*] posted on 19-11-2019 at 09:00 AM


DSEI Japan 2019: More details emerge about Japan’s new multi-mission frigates

Kosuke Takahashi, Chiba - Jane's Defence Weekly

18 November 2019


MHI displayed a scale model of its future multi-mission frigate concept at DSEI Japan 2019. Source: Kosuke Takahashi

More details have emerged about the new 3,900-tonne class of multi-mission frigates on order for the Japan Maritime Self-Defense Force (JMSDF).

Representatives of Japanese company Mitsubishi Heavy Industries, which is expected to build six of the eight frigates planned for the service, told Jane’s at the 18–20 November DSEI Japan 2019 defence exhibition in Chiba that the new frigate class will be 132.5 m long, 16 m wide, and have a beam of 9 m and a standard displacement of 3,900 tonnes.

Powered by a combined diesel and gas (CODAG) propulsion system featuring two MAN 12V28/33D STC diesel engines and one Rolls-Royce MT30 gas turbine, the ships are expected to be capable of attaining a top speed of 30 kt.

Armament on the frigates, each of which will be capable of embarking one helicopter as well as unmanned surface and underwater vehicles, is expected to include the navalised version of the Type-03 (also known as the ‘Chū-SAM Kai’) medium-range, surface-to-air missile, a 5-inch (127 mm)/62-calibre gun, a vertical launch system, canister-launched anti-ship missiles, and a SeaRAM close-in weapon system.

The Japanese Ministry of Defense (MoD) is expected to place orders for all eight multirole frigates by fiscal year (FY) 2021, with two ships set to be built every year in an arrangement that will see MHI and Mitsui alternate for the first time as lead and sub-contractors.

MHI, which in November 2018 was awarded a contract to build the first ship, is expected to construct six frigates of the class (with Mitsui Engineering and Shipbuilding [MES] as subcontractor), while MES will build the remaining two (with MHI as subcontractor).

Construction of the first two frigates is taking place at MHI’s Nagasaki Shipyard & Machinery Works in Nagasaki Prefecture and MES’s Tamano Shipyard in Okayama Prefecture. These first two ships will be launched in November 2020 and are expected to be commissioned in March 2022.

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[*] posted on 19-11-2019 at 09:07 AM


DSEI Japan 2019: KHI building second 3,000-tonne submarine for JMSDF

Gabriel Dominguez, Chiba and Kosuke Takahashi, Chiba - Jane's Defence Weekly

18 November 2019

Japan's Kawasaki Heavy Industries (KHI) has begun construction of the second of at least seven planned 3,000-tonne diesel-electric attack submarines (SSKs) to supplement the Japan Maritime Self-Defense Force's (JMSDF's) fleet of Soryu-class SSKs, a company spokesperson told Jane's at the 18-20 November DESI Japan 2019 defence exhibition in Chiba.

Construction of the boat, which is currently being referred to as '30SS' and is expected to enter service in March 2023, began in the middle of fiscal year 2018 (FY 2018).

The boat's current designation refers to the year 'Heisei 30' in the Japanese calendar (2018 in the Gregorian calendar), during which the Japan Ministry of Defense (MoD) allocated JPY69.7 billion (USD640.5 million) for the construction of the submarine, which has been given pennant number SS 514.

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[*] posted on 20-11-2019 at 09:41 PM


DSEI Japan 2019: JMU unveils preliminary LHD design

Gabriel Dominguez, Chiba - Jane's Defence Weekly

20 November 2019


JMU unveiled at DSEI Japan 2019 the preliminary design of an LHD amphibious assault ship it plans to propose to the JMSDF. Source: JMU

Shipbuilding company Japan Marine United (JMU) Corporation unveiled at the 18-20 November DSEI Japan 2019 defence exhibition in Chiba the preliminary design of a landing helicopter dock (LHD) amphibious assault ship that it plans to propose to the Japan Maritime Self-Defense Force (JMSDF).

Unlike the service's current Izumo-class helicopter carriers, JMU's Future Landing Helicopter Dock will be a roll-on/roll-off ship capable of deploying armoured amphibious assault vehicles and air-cushioned landing craft (LCAC), in addition to having a full-length flight deck to support helicopter operations.

The ship, which will have a crew of about 500, can accommodate up to five helicopters on its flight deck, with additional space for about five more helicopters in the vessel's two aircraft hangars located beneath the flight deck.

JMU's design shows that the ship will feature three more hangars, the use of which will depend on the JMSDF's requirements. The LHD will be capable of embarking up to two (LCAC)-like vessels in its well deck and more than 20 amphibious assault vehicles, such as the BAE AAV7A1, in its forward storage section, according to a company official.

However, no information was provided about the number of troops the ship will be capable of carrying.

According to the company, the LHD, which will be capable of reaching a top speed of 24 kt, is expected to be 220 m long, have a beam of 38 m, a draught of 7 m, and a standard displacement of 19,000 tonnes.

Although the Japanese Ministry of Defense (MoD) has yet to set out a formal requirement for this warship type, a company official told Jane's that JMU is anticipating that the announcement will be made in the coming years.

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[*] posted on 19-3-2020 at 09:29 PM


Japan MOD Takes Delivery of AEGIS Destroyer DDG-179 JS Maya

Posted On Thursday, 19 March 2020 12:03

On March 19 2020, Japan Ministry of Defense took delivery of its first Maya-class guided-missile destroyer, JS Maya (DDG-179), during a ceremony at the Japan Marine United Corporation’s Yokohama Shipyard Isogo Works facility. The destroyer Maya will be engaged in public safety and order maintenance at sea.


Japan launches lead Maya-class ballistic missile defense destroyer (Picture source: JMSDF)

JS Maya (DDG-179) is a Maya-class guided-missile destroyer in the Japan Maritime Self-Defense Force (JMSDF). Maya was named for Mount Maya and shares her name with a World War II heavy cruiser.

The new destroyer class is 170 meters long, displaces 8200 tons, will operate with a crew of 310 sailors and will be fitted with the AEGIS Baseline J7 combat system and the Northrop Grumman AN/SPQ-9B radar system.

Maya-class destroyers will field the SM-3 Block IIA missiles, for interception of short- and intermediate-range ballistic missiles, and will be capable of launching SM-6 anti-air missiles.

The ships are equipped with one 5-inch (127mm/L62) Mk-45 Mod 4 naval gun in a stealth-shaped mount, two 20 mm Phalanx Close-In Weapon Systems (CIWS), SM-3 Block IIA and SM-6 air/missile defense missiles and Type 17 ship-to-ship missiles.

Powered by two combined gas turbine-electric and gas turbine (COGLAG) engines, the ship and 300 crew are propelled to a maximum stated speed of 30 knots.
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