Engineering:Mogami-class frigate

From HandWiki
Short description: Class of Japanese stealth frigates
missing name underway in April 2022
Class overview
Name: Mogami class
Builders:
Operators:  Japan Maritime Self-Defense Force
Preceded by: Script error: The function "sclass" does not exist.[3]
Succeeded by: New FFM (Upgraded Mogami class)
Cost:

¥50.0 billion (2017 estimate)[4]

($450 million at 2017 exchange rate)
Built: 2019–present
In service: 2022-present
In commission: 2022–present
Planned: 12[5][1][2]
Building: 2
Completed: 8
Active: 8
General characteristics
Type: Frigate
Displacement:
Length: 132.5 m (434 ft 9 in)[6][1][2]
Beam: 16.3 m (53 ft 6 in)[6][3][5][2]
Draft: 9 m (29 ft 6 in)[6][5]
Propulsion:
Speed: over 30 knots (56 km/h; 35 mph)[6][5][1][2]
Boats & landing
craft carried:
2 × RHIB, UUV,[6][2] USV[6][1][2]
Crew: around 90[6][5][1][2]
Sensors and
processing systems:
Electronic warfare
& decoys:
NOLQ-3E (Passive radar system + Electronic attack capability is integrated into the main radar antenna), Chaff dispenser[1]
Armament:
Aircraft carried: 1 × SH-60L helicopter[1]
Aviation facilities: Single hangar

The Mogami-class frigate (Japanese: もがみ型護衛艦, romanized: Mogami-gata-goei-kan), also known as 30FFM, 30FF, 30DX, or 30DEX, is a Japanese, multi-mission stealth frigate for the Japan Maritime Self-Defense Force (JMSDF).

Development

In 2015, the Japanese defense budget allocated funds to study the construction of a new "compact-type hull destroyer with additional multi-functional capabilities", as well as a new radar system for the destroyer.[8] In 2015, Mitsubishi Heavy Industries (MHI) unveiled the frigate's first concept model (30FF), which they had been developing with their own funds.[4][9]

In August 2017, the Acquisition, Technology & Logistics Agency (ATLA) selected MHI and Mitsui Engineering and Shipbuilding as the prime contractor and subcontractor to construct the frigate. The agency selected a completely new design of the vessel (30DX), replacing the Script error: The function "sclass" does not exist.s and Script error: The function "sclass" does not exist.s.[4][3][7][1] The plan approved in December 2018 was to build 22 Mogami-class frigates.[2][1] Construction of the class began in 2019 - with a pair to be built each year.[10] But in August 2023, the Japanese Ministry of Defense announced that it would only build 12 ships to the Mogami-class design, and planned to build 12 "new FFM",[1] which have been described as "improved Mogami-class ships".[2]

In January 2023, ATLA announced the "Guidelines for Recruiting Applicants for the 'Plan Proposal Contract for the New FFM'".[11] Then in July 2024, MHI unveiled the Mogami-class frigate#Upgraded Mogami (ja), the formal name for the new FFM. Construction schedule for the "Upgraded Mogami" frigates will start in 2025, with launch of the first two hulls by 2027.[12] MHI plans to deliver all 12 FFM frigates to the JMSDF by 2033.[12]

In March 2024, it was reported that the Mogami-class frigates will be equipped with VLS systems from FY 2024.[13] The Mogami-class marks the first instalment of a CODAG system on any JMSDF ship.[5]

Design

Operational concept

On 16 December 2022, the Japanese Ministry of Defense released its Defense Buildup Program (ja) guidance, which noted that the Japanese Maritime Self Defense Force planned to replace its fleet of older, less capable destroyers and Script error: The function "sclass" does not exist.s with Mogami-class frigates.[14][3]

The overall intent of the 30DX design was to achieve a modern, frigate-sized vessel with capabilities similar to the Script error: The function "sclass" does not exist. destroyer but with a reduced crew and having only half the VLS cells.[15]

30FF

The original intention was to use the 30FF model. The 30FF design looked similar to the United States Navy's Script error: The function "sclass" does not exist. with an integrated mast. Its armament included a 5-inch/54-caliber Mark 45 gun, two remote weapon stations between the bridge and main gun, a SeaRAM battery above the helicopter hangar, and an onboard helicopter. The length of this version of the vessel was to be 120 metres (393 ft 8 in), with a max beam of 18 metres (59 ft 1 in), and a displacement of about 3,000 metric tons (3,000 long tons). The 30FF design had a planned maximum speed of 40 knots (74 km/h; 46 mph) and accommodated a crew of about 100.[4][16]

30DX

A 3D concept rendering of the 30DX frigate

The 30DX model was eventually chosen to be constructed. The 30DX design, although modern, is more conservative compared to the 30FF's more radical approach. The three main factors for the design change were due to the need for affordability, miniaturization/automation, and multi-mission capabilities.[4] The vessel has a length of 130 metres (426 ft 6 in), a breadth of 16 metres (52 ft 6 in), a standard displacement of 3,900 metric tons (3,800 long tons) with a full load displacement of about 5,500 metric tons (5,400 long tons). It has a maximum speed of over 30 knots (56 km/h; 35 mph).[17] The frigates will be powered by a Rolls-Royce MT30 gas turbine.[18]

Weapons for the 30DX include a Mk 45 gun, two remote weapon stations above the bridge, a 16-cell Mk 41 Vertical Launching System (VLS) at the bow, eight anti-ship missiles, one SeaRAM, an SH-60L helicopter, torpedoes, and decoy launchers. Another capability is to deploy and recover unmanned underwater vehicles (UUV), unmanned surface vehicles (USV),[19] and sea mines from the rear ramp beneath the helicopter deck.[15] As of 2018, there were plans to install the Type 23 ship-to-air missiles under development on the Mogami class VLS,[20] but, as of 2023, only Type 07 VLAs will be installed on the VLS. The Type 23 ship-to-air missiles are planned to be installed on the "Upgraded Mogami", for which construction will begin in fiscal year 2024.[21]

The stealthy design of both models is based on the research and development lessons learned from the Mitsubishi X-2 Shinshin, then: ATD-X, stealth fighter technology demonstrator, as both platforms are designed by Mitsubishi Heavy Industries.[17][22] Along with stealth capabilities, the frigate emphasizes a high level of automation. This allows the frigate to possess a small crew size of only 90 personnel when compared to the crew complement of other ships of similar size.[23]

At Sea Air Space 2019, Mitsubishi Heavy Industries revealed their 'Advanced Integrated CIC' for the vessel. It will combine the wheelhouse, the managing and situational awareness room, the engine and power control room, and combat information center within a large 360-degree circular screen wall.[24] It can display panoramic views around the ship without a blind spot on the screen and will utilize augmented reality technology to discriminate among the objects shown and to navigate the ship.[23] This allows the crew to operate under a Total Ship Crew System (TSCS) where navigation, steering and ship management is centralized into one area.[25]

Upgraded Mogami

The "Upgraded Mogami" or "New FFM" is an evolution of the original Mogami-class frigates. It has a length of 142 metres (465 ft 11 in), a beam of 17 metres (55 ft 9 in), and a standard displacement of 4,880 metric tons (4,800 long tons).[1][2] The "Upgraded Mogami" will have an improved radar and a 32-cell Mark 41 VLS, an additional 16-cells compared to the earlier Mogami frigates.[12][1]

Ships in the class

The budget for the procurement of VLS is allocated separately from the budget for the construction of the vessels, with the supplementary budget for FY2021 allocated for the procurement of two VLS and the budget for FY2023 allocated for the procurement of 10 VLS. As a result, the VLS will gradually be installed on vessels from JS Mogami to JS Agano that were not equipped with VLS when they entered service.[26]

Hull No. Name Laid down Launched Commissioned Builder
FFM-1 missing name 29 Oct 2019 3 Mar 2021[27][2] 28 Apr 2022[28][29][3][1] MHI (Nagasaki)
FFM-2 missing name 30 Oct 2019 19 Nov 2020[2] 22 Mar 2022[30][3][1] Mitsui E&S[1][2] (Tamano)[lower-alpha 1]
FFM-3 missing name 15 Jul 2020 22 Jun 2021[32][2] 15 Dec 2022[33][1] MHI (Nagasaki)
FFM-4 missing name 15 Jul 2020 10 Dec 2021[2] 7 Mar 2023[34][35][1] MHI (Nagasaki)
FFM-5 missing name 24 Jun 2021[36] 23 Jun 2022[37][2] 21 May 2024[38] MHI (Nagasaki)
FFM-6 JS Agano 21 Dec 2022[39][2] 20 Jun 2024[40] MHI (Nagasaki)
FFM-7[6] JS Niyodo 30 Jun 2022[41] 26 Sep 2023[42][43][6][2] 21 May 2025[44][45] MHI (Nagasaki)
FFM-8 JS Yūbetsu[46] 30 Aug 2022[47] 14 Nov 2023[47][48][1][2] MHI (Tamano)[49][1][2]
FFM-9 JS Natori[50] 6 Jul 2023 24 Jun 2024[51][3][5] Dec 2025 MHI (Nagasaki)[51][3][5]
FFM-10 missing name 19 Dec 2024 Mar 2026 MHI (Nagasaki)
FFM-11 missing name 3 Jul 2024 2 Jul 2025 Dec 2026 MHI (Nagasaki)
FFM-12 TBD Mar 2027 MHI (Nagasaki)
  Planned date

Export

Both frigate designs have been showcased in four naval exhibitions to attract potential export customers. The 30FF was shown in PACIFIC 2015 as a contender for the Royal Australian Navy's SEA5000 ASW Frigate Program and on display again at Sea Air Space 2017.[16][22] The 30DX design was shown in Sea Air Space 2018, as well as 2019, and Euronaval 2018.[15][52] The new FFM design was showcased at Indo Pacific 2023[2] as the 'FMF-AAW'.[53]

Australia

The FFM design was shortlisted as a contender for the Royal Australian Navy's new general purpose frigates.[54] Australia plans to acquire up to eleven frigates.[54] The first batch of ships will be built overseas before transitioning to an Australian build.[55]

The Mogami design competed with Germany's MEKO A-200, South Korea’s FFX Batch II/III, and Spain’s Alfa 3000 as proposed entries for RAN's next frigate.[56]

MHI displayed the "Upgraded Mogami", previously known as the new FFM, at IODS 2024.[12] The "Upgraded Mogami" frigate represents MHI's proposal for the Royal Australian Navy's general purpose frigate program.[12] In September 2024, it was announced that Canberra will decide on a frigate model for the GPFP before the end of the year.[57] The Mogami design was one of the final two designs (alongside Germany's MEKO A-200 design) shortlisted in November 2024.[58]

On 28 November 2024, it was announced that Tokyo will allow Canberra to be involved in joint development and production of the Mogami class, if it is selected to be the new Australian frigate.[59]

On 12 February 2025, the missing name sailed to Australia for joint military drills with Australia with a port call in the Philippines in an effort to demonstrate the ship to the Royal Australian Navy.[60] On 6 June 2025, the JS Yahagi docked in Darwin with JMSDF officers hosting a reception for officers in Royal Australian Navy.[61]

On 21 July 2025, Japanese officials conducted a briefing in Canberra, showing the upgraded Mogami and its advantages of being equipped to be interoperable with the US Navy.[62]

On 5 August 2025, the New FFM was selected, with the first ship to be delivered in 2029 and operational by 2030.[63][64] The first 3 FFMs will be build in MHI's shipyards in Japan. It is claimed that the following 8 will be built in Henderson Shipyard, WA.[65]

Indonesia

Japan initially planned to export four frigates to Indonesia either on late 2023 or early 2024.[66] Another four were to be built in Indonesia under a ¥300 billion contract under PT PAL.[67][66] In March 2021, Japan and Indonesia signed a military cooperation agreement, which increased speculation that the Mogami-class frigate would be exported to Indonesia.[68]

However, as of mid-2024, no export contract had been signed. The Indonesian Navy instead plans to acquire two Arrowhead 140 frigates and up to six FREMM frigates.[69]

Interests

On 21 October 2025, the Royal New Zealand Navy expressed interest in the frigate.[70]

Footnotes

  1. Mitsubishi Heavy Industries Maritime Systems took over Mitsui's shipbuilding business during the construction of the ship.[31]

References

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