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