U.S. Air Force Stations First Permanent F-15EX Fighter Jets in Japan for Pacific Air Defense.

The U.S. Air Force has stationed its first permanent F-15EX Eagle II fighter jets at Kadena Air Base in Okinawa, Japan, to strengthen Pacific air defense. The arrival begins to replace the base’s aging Eagles, supporting Japan’s defense and counterair missions alongside fifth-generation fighters across the strategically important region.

The second permanently assigned U.S. Air Force F-15EX Eagle II, assigned to the 67th Fighter Squadron, touches down at Kadena Air Base, Japan, on November 15, 2026, advancing the installation’s transition to a permanent Eagle II force. (Picture source: U.S. Air Force)

Key Tactical Insights:

• U.S. Air Force F-15EX permanent presence in Japan: Assignment to Kadena establishes an overseas combat-unit home for the F-15EX, advancing the transition toward a permanently based Eagle II force.

• Expanded missile capacity: The F-15EX can carry 12 air-to-air missiles, compared with eight on earlier Eagles, increasing potential engagement opportunities before rearming. The arriving aircraft’s weapons configuration was not specified.

• Transition still underway: The United States plans to replace 48 F-15C/Ds with 36 F-15EXs at Kadena. The first arrival does not establish completion of deliveries, full squadron readiness or an end to rotational fighter deployments.

The U.S. Air Force 18th Wing confirmed that the first permanently assigned aircraft arrived at Kadena Air Base, Japan, on November 15, 2026. Assigned to the 67th Fighter Squadron, the aircraft make Kadena the first overseas Air Force installation to receive combat-coded F-15EX fighter jets.

The permanent assignment advances the modernization of American fighter forces stationed in Japan. Under the Pentagon’s announced plan, 36 F-15EXs will replace Kadena’s former 48-aircraft F-15C/D fleet. Fourth- and fifth-generation fighters will maintain a rotational presence throughout the transition, meaning this milestone does not signal the withdrawal of those supporting aircraft.

Related Topic: U.S. Marines Deploy New Amphibious Combat Vehicles in Japan to Strengthen Indo-Pacific Readiness

More missiles and modern electronic protection

Air Combat Command describes the F-15EX as capable of carrying 12 air-to-air missiles, enabled by four additional missile stations compared with earlier Eagles. A larger load can provide more engagement opportunities before an aircraft must return to rearm. Actual employment depends on the mission configuration, available weapons and operational conditions; the arrival announcement does not specify the Kadena aircraft’s loadout.

The F-15EX Eagle II incorporates the APG-82 active electronically scanned array radar and the Eagle Passive Active Warning Survivability System, or EPAWSS. Pentagon testing documentation describes EPAWSS as a self-protection suite that detects, identifies, and locates threat signals and can respond with jamming or expendable countermeasures. These systems support situational awareness and survivability against radar-guided threats but do not guarantee protection in every engagement.

Although the F-15EX is a multirole fighter, the Air Force initially intends to employ it in air superiority missions. Its intended tasks include offensive and defensive counterair, cruise-missile defense, and escort of high-value airborne assets. These roles make its combination of sensors, electronic protection, and missile capacity directly relevant to Japan's air defense mission.

Why U.S. forces are permanently stationed in Japan

The permanent American military presence rests on the 1960 U.S.-Japan Treaty of Mutual Cooperation and Security. Article VI provides for U.S. access to facilities and areas in Japan to contribute to Japan’s security, peace, and stability in the Far East. Article V commits both countries to act against the common danger posed by an armed attack against either party in territories under Japanese administration, in accordance with their constitutional provisions and processes.

U.S. Forces Japan describes its mission as strengthening the alliance to deter and, if necessary, defeat threats against Japan. Its headquarters coordinates bilateral defense matters and prepares for crises and contingencies. Maintaining forces in the country supports regular bilateral operations, established command relationships, and preparation with Japanese counterparts, providing a standing foundation for an allied response. 

The bilateral defense framework gives Japan’s Self-Defense Forces primary responsibility for defending Japan, with U.S. forces supporting and supplementing their operations. For air defense, this includes cooperation against hostile aircraft and cruise missiles. Ballistic-missile defense is another alliance mission, involving bilateral operations and information sharing; it is distinct from the F-15EX’s air superiority and cruise-missile defense roles. Kadena’s permanent fighter force therefore contributes to a broader defense structure rather than assuming sole responsibility for protecting Japanese airspace. 

Building the permanent force at Kadena Air Base in Japan

The U.S. Air Force 67th Fighter Squadron’s immediate task is to integrate the aircraft into local flying operations and build experience. The 18th Wing identifies both the 44th and 67th Fighter Squadrons as future F-15EX operators at Kadena, but the announcement does not establish that both units have reached full operational readiness.

The planned replacement fleet contains 12 fewer aircraft than the former F-15C/D force. That makes aircraft availability, maintenance support, and each fighter's capability important considerations alongside the total inventory. The confirmed milestone is the start of permanent U.S. Air Force F-15EX fighter jets fielding in Japan; delivery of the complete 36-aircraft force remains a separate objective.

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Written by Alain Servaes – Chief Editor, Army Recognition Group

Alain Servaes is a former infantry non-commissioned officer and the founder of Army Recognition. With over 20 years in defense journalism, he provides expert analysis on military equipment, NATO operations, and the global defense industry.