Japanese Navy (JMSDF) : Updates and Discussions

PLAN will be the fastest disappearing navy ever if it attacks Taiwan. Between this and Dark Eagle/CPS.

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Video: Japan tests Hyper Velocity Gliding Projectile - HVGP - Naval News

Japan's ATLA released footage for the first time of the test launch of a Hyper Velocity Gliding Projectile (HVGP) for island defense conducted in March this year.
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The HVGP is a new weapon scheduled to be deployed by the Japan Ground Self-Defense Force (JGSDF) starting in the fiscal year 2026. The hypersonic weapon is being developed for “island defense” roles. After being launched by a booster from a truck-mounted launcher, the warhead separates and glides to attack its target. The estimated range is approximately 900 km.
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To achieve early deployment, the HVGP is planned to be developed in incremental capability enhancements. The test conducted this time was for the most basic “Early Deployment Version (Block 1)” test projectile. Furthermore, the development of an “Enhanced Capability Version (Block 2A)” with a significantly extended range capable of attacking targets up to 2,000 km away, and an “Enhanced Capability Version (Block 2B)” with a range of 3,000 km, is scheduled to be completed in the fiscal years 2027 and 2030, respectively.
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As previously reported by Naval News, Japan’s HVGP (速滑空弾) could eventually have an anti-ship capability and be used against aircraft carriers. This consideration is part of the research on future enhanced capability versions. In the future, it is possible that the warhead could be equipped with a seeker for use in anti-ship mission.
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www.defensenews.com

Japan reveals test launch of its hypersonic strike missile program

Tokyo plans to boost its missile force in an effort to strike invaders before they reach the island.
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Wright noted, “Japan is developing the HVGP for both anti-ship and land attack missions to intercept and eliminate invading forces against Japan at a distance and at an early stage.”
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Block I - ~900km
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Block III - 3,000km
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Japan Plans New Missile Range In Southeastern Island - Naval News

Japan Ministry of Defense is planning to establish a new missile range in the island of Minamitorishima for the Type 12 Surface-to-Ship Missile
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To make matters worse, Japan is introducing all kinds of domestic and foreign Long Range Stand-Off Missiles as part of a recent force buildup, most notably the improved Type 12 SSM with 745 miles (1,200km) of range which is unprecedented for the JSDF. This forced the Japanese Ministry of Defense to rethink how they could create more live firing training (and testing) in the long term.
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news.yahoo.co.jp

三菱重工、AI搭載の戦闘支援無人機の模型初公開　2025年中にAI搭載無人機の飛行試験を初実施へ（高橋浩祐） - エキスパート - Yahoo!ニュース

日本の防衛最大手企業の三菱重工業は10月16日に東京・有明の東京ビッグサイトで開会した「2024国際航空宇宙展」で、人工知能（AI）を搭載する戦闘支援無人機の模型を初公開した。AI活用によるこの自律型
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news.yahoo.co.jp

三菱重工の新型巡航ミサイル？「ARMDC-2OX」（JSF） - エキスパート - Yahoo!ニュース

3月12日、防衛省防衛装備庁は高見防衛大臣補佐官が三菱重工の小牧南工場および小牧北工場を視察する様子を公表しました。そして以前にも紹介されたことがある小牧北工場に飾られた新型巡航ミサイルらしき実物大
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www.twz.com

First Japanese Destroyer Heads To U.S. For Tomahawk Missile Modifications

Japan sees the fielding of Tomahawk aboard its most capable surface combatants as a big boost in offensive punch that will help deter potential foes.
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The first Japanese warship destined to receive a Tomahawk cruise missile capability is now sailing to the United States for the required modifications. The Kongo class destroyer Chokai is at the forefront of Japan’s long-standing ambition to receive the long-range land attack cruise missiles, which it initially plans to field on its Aegis warships, although ground and submarine launch platforms could also follow in the future.

The Japan Maritime Self-Defense Force (JMSDF) announced yesterday that the process of reworking Chokai for Tomahawk had begun. On September 26, the warship conducted missile-loading training, involving dummy Tomahawk rounds, supported by U.S. Navy personnel, at Yokosuka Base. The 90 “strike length” Mk 41 vertical launch system (VLS) cells on the Kongo class are already long enough to accommodate the Tomahawk.


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Japan Will Arm Its Submarines With Long-Range Cruise Missiles

As well as a new sub-launched cruise missile, Japan will be getting upgraded versions of its Type 12 anti-ship missile for its surface combatants. As well as a new sub-launched cruise missile, Japan will be getting upgraded versions of its Type 12 anti-ship missile.
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Japan continues to work toward enhancing its long-range cruise missile capability, with contracts issued for a new standoff capability for its submarine fleet, as well as improved anti-ship missiles for its destroyers. Contracts have now been issued for the mass production of both those weapons, which come as the country bolsters its abilities to attack both land targets and enemy surface warships, to counter the growing threats from China and North Korea, in particular.

Japan’s Ministry of Defense announced the new contracts for the upgraded ship-launched Type 12 anti-ship missile and the unnamed torpedo-tube-launched cruise missile for submarines on Tuesday. Both contracts were awarded to Mitsubishi Heavy Industries (MHI).
 
www.naval-technology.com

Kawasaki launches sixth Taigei-class submarine in Japan

Kawasaki Heavy Industries has launched Sougei, the sixth Taigei-class submarine at its No.1 Building Berth in Kobe Shipyard in Kobe, Japan.
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Kawasaki Heavy Industries has launched Sougei, the sixth Taigei-class submarine at its No.1 Building Berth in Kobe Shipyard in Kobe, Japan.

The attack submarine was launched in a ceremony attended by top officials from the Japan Ministry of Defense (MoD).

Submarine Sougei measures 84 metres (m) in length, with a beam of 9.1m and a depth of 10.4m.

Powered by two Kawasaki 12V 25/25 SB-type diesel engines and an electric propulsion motor, the vessel has a displacement of 3,000 tonnes (t). It can accommodate a crew of 70 personnel.

The armament comprises underwater launch tubes and is equipped with a snorkel system, allowing it to draw in fresh air from the surface and expel exhaust gases while remaining submerged.

A notable feature of the Taigei-class submarines is the lithium-ion batteries, which boosts its speed and operational range beyond that of traditional diesel-electric submarines.
 
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High-Energy Laser System Spotted Aboard JMSDF Test Ship - Naval News

On 2 December 2025, a containerized prototype high-energy laser system was confirmed to be installed on the aft deck of JS Asuka, the test ship operated by the Japan Maritime Self-Defense Force (JMSDF).
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On 2 December 2025, a containerized prototype high-energy laser system was confirmed to be installed on the aft deck of JS Asuka, the test ship operated by the Japan Maritime Self-Defense Force (JMSDF).

Japan’s Ministry of Defense (MoD) has been advancing the development of high-energy laser systems under the leadership of the Acquisition, Technology & Logistics Agency (ATLA) as a low-cost interceptor compared with existing air-defense systems.

The ongoing research and development programs for laser systems are broadly divided into two categories: a vehicle-mounted high-mobility laser system and a larger, high-output laser system.

The vehicle-mounted laser system has been under development from FY2021 to FY2024, integrating all necessary subsystems into a single heavy truck equipped with a 10-kW-class laser primarily intended for counter-small-UAV operations. Mitsubishi Heavy Industries (MHI) secured the manufacturing contract, and the truck-mounted demonstrator was completed and delivered in October 2024. The actual vehicle was unveiled at DSEI Japan in May 2025. Based on the results of this program, efforts are currently underway within the Japan Ground Self-Defense Force (JGSDF) to field an operational laser system.
 
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New vids on the KHI cruise missile and XKJ-301-1 that will go into it. We have an official test launch that shows the terminal phase maneuvering as well. This is the 2000km missile with the interchangeable warheads that will eventually replace the interim Tomahawk purchase.


 
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JMSDF Launches 'Fleet Surface Force', Scrapping Decades-Old 'Escort Fleet' - Naval News

On March 23, the Japan Maritime Self-Defense Force (JMSDF) formally disbanded its long-standing “Fleet Escort Force” (護衛艦隊) and established a new “Fleet Surface Force” (水上艦隊), marking its most sweeping organizational overhaul since 1954.
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US MDA, JMSDF Complete Successful ASEV Integration Testing - Naval News

The Missile Defense Agency (MDA), in partnership with the Japan Maritime Self-Defense Force (JMSDF), successfully conducted the first live target tracking exercise using the SPY-7 radar meant for the ASEV
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