Japan Expands F-35B Fleet with Latest Delivery to Nyutabaru Air Base

In late March 2026, the Japan Air Self-Defense Force (JASDF) received three additional F-35B Lightning II stealth fighters at Nyutabaru Air Base in Miyazaki Prefecture. According to social media account @thef35 on X, the delivery highlights that procurement

“momentum continues”

for the Japanese defense forces.

This latest arrival is a critical milestone. Based on defense research data, the delivery keeps Japan’s Ministry of Defense on track to meet its goal of deploying an initial batch of eight F-35Bs by the end of fiscal year 2025, which concludes on March 31, 2026. Japan received its first three F-35Bs on August 7, 2025, ferried by U.S. pilots, and officially activated the fleet for frontline service during a ceremony on February 7, 2026.

The integration of the Short Take-Off and Vertical Landing (STOVL) aircraft represents a historic shift in Japan’s defense posture. Defense reports indicate Japan plans to acquire 147 F-35s in total, 105 conventional F-35As and 42 F-35Bs, making it the largest operator of the fifth-generation fighter outside the United States.

Strategic Shift: The “Lightning Carriers”

While the F-35Bs are operated by the JASDF, defense analysts note their primary strategic value lies in their integration with the Japan Maritime Self-Defense Force (JMSDF).

Vessel Modifications and Sea Trials

To accommodate the STOVL aircraft, Japan has been modifying its two largest warships, the Izumo-class helicopter destroyers JS Izumo and JS Kaga. According to defense research, these modifications include reshaping the bows into a rectangular configuration and applying heat-resistant deck coatings capable of withstanding the F-35B’s powerful lift fan.

These upgrades were put to the test recently. In October 2024, a U.S. Navy and Marine Corps F-35B successfully conducted the first landing and takeoff trials on the modified JS Kaga off the coast of San Diego, California. This milestone effectively proved the vessel’s capability to operate as a light aircraft carrier, returning fixed-wing carrier aviation to the Japanese fleet for the first time since World War II.

Geopolitical Drivers and Regional Defense

Japan’s acquisition of the F-35B is widely viewed by defense researchers as a direct response to a tightening regional security environment, particularly the rapid military modernization and maritime maneuvers of China in the East and South China Seas.

Defending the Nansei Islands

Nyutabaru Air Base is strategically located on Kyushu, Japan’s southernmost main island. Defense reports highlight that this positions the F-35B fleet in close proximity to the Nansei Islands chain, which stretches toward Taiwan and includes the Japanese-administered Senkaku Islands. The STOVL capability allows Japan to project air power from the sea and operate from shorter, austere runways on remote islands.

Under its post-WWII pacifist constitution, Japan has historically maintained a strictly defensive military posture. The deployment of carrier-capable stealth fighters represents a shift toward what defense analysts term “active deterrence.” To navigate political sensitivities regarding offensive capabilities, the Japanese government officially classifies the Izumo and Kaga as “multi-functional destroyers” rather than aircraft carriers.

Domestic Challenges and Infrastructure

Despite the strategic momentum, the domestic rollout of the F-35B fleet has faced logistical and political hurdles.

Local Impact at Nyutabaru

According to defense research data, Japan is constructing a dedicated runway and training facility on the uninhabited island of Mageshima, located roughly 160 kilometers south of Nyutabaru. This facility is intended for F-35B Field Carrier Landing Practice (FCLP) and vertical landing drills.

However, the Mageshima project has been delayed until approximately 2029 or 2030. Consequently, routine vertical landing training must be conducted at Nyutabaru Airports in the interim. This temporary arrangement has triggered protests and concerns from local residents in Miyazaki Prefecture regarding severe aircraft noise pollution.

AirPro News analysis

We view the successful delivery of these F-35Bs as more than just a national defense upgrade for Japan; it is a foundational step for allied interoperability in the Indo-Pacific. By operating the F-35B from modified destroyers, Japan ensures seamless integration with U.S. Navy and Marine Corps forces, as well as other allied operators like the United Kingdom and Italy. This opens the door for future cross-decking operations, where allied jets can land on Japanese ships and vice versa, creating a highly flexible, distributed maritime strike capability that complicates adversary planning in the region.

Frequently Asked Questions (FAQ)

How many F-35s is Japan buying?

According to defense procurement data, Japan plans to acquire a total of 147 F-35 military-aircraft, consisting of 105 F-35A conventional takeoff variants and 42 F-35B STOVL variants.

What makes the F-35B different?

The F-35B features Short Take-Off and Vertical Landing (STOVL) capabilities, allowing it to operate from amphibious assault ships, light aircraft carriers, and short or austere runways.

Why are Japan’s carrier-capable ships called destroyers?

To align with its post-WWII pacifist constitution, which limits offensive military capabilities, Japan officially classifies the modified Izumo-class vessels as “multi-functional destroyers” rather than aircraft carriers.

Sources: @thef35, Defense Research Report

This article is based on an official press release from GKN Aerospace.

GKN Aerospace has officially delivered the first upgraded RM12 engine to the Swedish Armed Forces, marking a critical milestone in the RM12 Enhanced Performance (RM12EP) programme. The delivery is part of a broader initiative to modernize the propulsion systems of Sweden’s JAS 39 Gripen C/D fighter fleet.

According to a company press release, the RM12EP programme is valued at approximately £32 million (SEK 400 million). The initiative focuses on increasing engine thrust, extending operational endurance, and improving overall efficiency to ensure the legacy fighter aircraft remain highly capable in modern operational environments.

The successful handover of the first enhanced engine underscores GKN Aerospace’s nearly century-long partnership with the Swedish Air Force. As the type certificate holder for the RM12 engine, the company continues to play a central role in maintaining Sweden’s aerial defense readiness.

The RM12EP Upgrade Programme

Technical Enhancements

The RM12EP upgrade introduces significant technical improvements to the existing powerplants. In its official statement, GKN Aerospace noted that the enhancements include the installation of improved turbine hardware alongside updated engine control software. These modifications are specifically designed to boost engine thrust and extend the operating time of the engines, while simultaneously reducing life cycle costs for the Swedish Armed Forces.

The RM12EP programme was originally launched in 2019. It represents a long-term strategic effort led by GKN Aerospace to ensure that the Gripen C/D remains a cost-efficient and highly capable platform, even as newer generations of fighter aircraft enter service.

Production and Partnerships

All upgrade work for the RM12 engines is being conducted at GKN Aerospace’s specialized facility in Trollhättan, Sweden. The company maintains comprehensive responsibility for the development, manufacturing, system support, and maintenance of both the RM12 engine, which powers the Gripen C/D, and the newer RM16 engine, which is utilized in the advanced Gripen E/F models.

The delivery of the first upgraded unit was achieved through extensive cross-functional collaboration. GKN Aerospace highlighted that the milestone involved coordination across engineering, production, quality assurance, procurement, and logistics departments. Furthermore, the project relies on key partnerships with industry leaders GE and Saab. Additional upgraded engines are scheduled to be delivered continuously to the Swedish Armed Forces in accordance with the programme’s planned timeline.

“This first upgraded engine delivery represents an important step forward in enhancing the performance and endurance of the Gripen system. As type certificate holder for the Gripen C/D engine and with a partnership with the Swedish Air Force that spans nearly a century, we are proud to continue supporting Sweden’s operational capability and future readiness.”

Strategic Implications for the Swedish Air Force

AirPro News analysis

We note that the delivery of the first upgraded RM12 engine highlights a broader trend in global defense procurement: the necessity of extending the operational lifespan of proven legacy platforms. While the Swedish Air Force is actively transitioning to the next-generation Gripen E/F, maintaining a robust and capable fleet of Gripen C/D aircraft remains essential for national security and regional stability.

By investing £32 million into the RM12EP programme, Sweden is ensuring a cost-effective bridge between aircraft generations. The enhancements to thrust and endurance not only improve the tactical capabilities of the Gripen C/D but also optimize maintenance schedules and reduce long-term operational costs. This dual-track approach, upgrading existing assets while procuring new ones, allows the Swedish Armed Forces to maintain a high state of readiness without compromising on technological advancement.

Furthermore, keeping the upgrade work localized at the Trollhättan facility secures domestic aerospace expertise and supply chain resilience. As geopolitical tensions in Europe remain a focal point for defense ministries, the ability to independently maintain and upgrade critical defense infrastructure is a significant strategic advantage for Sweden.

Frequently Asked Questions

What is the RM12EP programme?

The RM12 Enhanced Performance (RM12EP) programme is an upgrade initiative led by GKN Aerospace for the Swedish Armed Forces. Launched in 2019, it aims to improve the thrust, endurance, and efficiency of the RM12 engines powering the JAS 39 Gripen C/D fighter aircraft.

How much is the RM12EP programme worth?

According to GKN Aerospace, the programme is valued at approximately £32 million, which equates to SEK 400 million.

Where is the upgrade work being performed?

All development, manufacturing, and maintenance work for the RM12 engine upgrades is carried out at GKN Aerospace’s facility in Trollhättan, Sweden.

Who are the key partners in this programme?

The RM12EP programme involves strong collaboration between GKN Aerospace and key industry partners, including GE and Saab.

Sources

• GKN Aerospace

This article is based on an official press release from SAFE Structure Designs.

SAFE Structure Designs has successfully delivered a custom aviation maintenance tooling suite for the U.S. Army’s new Boeing CH-47 Chinook Block II helicopter fleet. According to a company press release, the specialized equipment is designed to safely remove, inspect, pressure-test, and reinstall the aircraft’s fuel cell systems, ensuring strict operational readiness standards are met.

The Las Vegas-based defense engineering and manufacturing company secured the contract after a previous supplier failed to meet the Army’s technical and budgetary requirements. SAFE reportedly engineered and manufactured the replacement solution rapidly, delivering the new system ahead of schedule and under budget. This delivery ensures that Army aviation maintenance teams can efficiently service the upgraded heavy-lift helicopters without unnecessary aircraft downtime.

As the U.S. Army modernizes its heavy-lift capabilities for future large-scale combat operations, the demand for specialized support equipment has become increasingly critical. We note that this delivery highlights the importance of agile secondary engineering firms in maintaining operational readiness when initial supply chain nodes falter.

The Maintenance Tooling Suite

Purpose and System Components

The primary purpose of the newly delivered tooling suite is to allow Army aviation maintenance teams to efficiently and safely service the fuel cell systems of the CH-47 Block II aircraft. According to the official release and supporting defense industry data, the suite comprises several purpose-built components designed to streamline the maintenance process.

Key components of the system include:

• Fuel Cell Removal and Installation Cradle: A specialized cradle that securely houses the fuel tank. This allows technicians to safely perform necessary inspections and servicing while the cell is completely removed from the helicopter.
• Pressure-Testing Tool: A dedicated diagnostic device that enables maintainers to test the fuel cells for leaks, cracks, or other structural integrity issues prior to reinstallation.
• Custom Spreader Bar: This component is equipped with specialized lift attachments to facilitate the safe and balanced removal and installation of the heavy fuel cells.

Contract Background and Execution

The procurement of this tooling suite underscores the rigorous demands of military contracting. SAFE Structure Designs was awarded the project only after the initial contractor’s designs were rejected.

The initial contractor’s designs were deemed poorly engineered, exceeded budget expectations, and failed to meet the needs of Army aviation maintenance personnel.

Following this setback, SAFE was brought in to rectify the situation. The company leveraged its engineering capabilities to produce a viable replacement solution, ultimately delivering the critical maintenance equipment to the Army ahead of the revised schedule and below the anticipated budget.

Contextualizing the CH-47 Chinook Block II Program

Aircraft Upgrades and Capabilities

To understand the necessity of this specialized tooling, it is essential to look at the aircraft it supports. The CH-47 Block II is the centerpiece of the U.S. Army’s heavy-lift modernization strategy. According to U.S. Army program outlines, the Block II iteration features a strengthened airframe, an upgraded drivetrain, and an enhanced fuel system.

These structural and mechanical upgrades increase the helicopter’s maximum gross weight by 4,000 pounds, bringing it to a total of 54,000 pounds. This enhanced capacity allows operational commanders to transport more troops, heavy equipment, and fuel over significantly longer distances compared to legacy models.

Army Procurement and Rapid Fielding

The U.S. Army has aggressively pursued the integration of the Block II fleet. In late 2025, the Army authorized a “Rapid Fielding” effort to procure CH-47F Block II aircraft utilizing Fiscal Year 2025 and 2026 funds. Defense procurement records indicate that the Army plans to equip two combat aviation brigades (CABs), which will require a total of 24 aircraft.

Recent contract awards further illustrate this momentum. In October 2025, Boeing received two contracts (Lots 4 and 5) valued at $461 million to produce nine additional CH-47F Block II helicopters, bringing the total number on order to 18. Furthermore, the FY2026 defense budget includes funding for six CH-47F Block II helicopters and five MH-47G Block II variants, which are utilized by special operations forces.

SAFE Structure Designs’ Track Record

Previous Chinook Support Equipment

Based in Las Vegas, Nevada, SAFE Structure Designs specializes in mission-critical military support equipment, aviation maintenance systems, and expeditionary platforms. The company is led by President and CEO Johnny Buscema, who frequently emphasizes American manufacturing principles in corporate communications.

The company has an established history of providing specialized equipment for the Chinook platform. In 2022, SAFE delivered custom, ergonomic fall-protection maintenance platforms to the Army at Fort Hood. These platforms allowed technicians safe access to all areas of the CH-47F fleet during routine and heavy maintenance.

More recently, in September 2024, the U.S. Army issued an airworthiness memorandum for SAFE’s patented 360-degree Extended Range Fuel System (ERFS) tank roller system. According to defense industry reports, this system facilitates the safe loading and unloading of heavy 500-gallon and 800-gallon auxiliary fuel tanks into the CH-47 cargo hold.

AirPro News analysis

The transition of the CH-47 Block II tooling contract to SAFE Structure Designs highlights the layered and sometimes volatile nature of defense supply chains. When primary or initial niche suppliers fail to meet technical standards, agile secondary engineering firms are required to step in to maintain operational readiness and prevent broader program delays.

Furthermore, as the Army modernizes its heavy-lift fleet for future large-scale combat operations, the demand for specialized, high-value support and maintenance products becomes just as critical as the procurement of the aircraft themselves. Efficient maintenance tooling directly impacts the sortie generation rate and the overall lifecycle cost of the Block II fleet. Without reliable ground support equipment, even the most advanced rotorcraft cannot maintain the operational tempo required by modern combat aviation brigades.

Frequently Asked Questions

What is the CH-47 Block II?

The CH-47 Block II is the latest upgraded version of the U.S. Army’s heavy-lift Chinook helicopter. It features a strengthened airframe, an upgraded drivetrain, and an enhanced fuel system, increasing its maximum gross weight to 54,000 pounds.

What does the new SAFE Structure Designs tooling suite do?

The custom tooling suite allows Army aviation maintenance teams to safely remove, inspect, pressure-test, and reinstall the fuel cell systems of the CH-47 Block II aircraft. It includes a removal cradle, a pressure-testing tool, and a custom spreader bar.

Why did SAFE Structure Designs take over this contract?

According to industry reports, the initial contractor failed to meet the Army’s technical and budgetary requirements, producing designs that were poorly engineered. SAFE Structure Designs was brought in to engineer a replacement, which they delivered ahead of schedule and under budget.

Sources

• SAFE Structure Designs Press Release