By The War Zone | Created at 2026-09-03 18:10:39 | Updated at 2026-09-03 18:59:24
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The first F-15EX Eagle II destined for permanent assignment at Kadena Air Base in Okinawa departed Boeing’s St. Louis, Missouri, facility on August 28, 2026. The aircraft left St. Louis for the 142nd Wing at Portland Air National Guard Base, Oregon, where it will undergo final staging and integration preparations before its eventual deployment to the sprawling Okinawa installation it will call home. The Oregon unit is acting as a coordination and preperation unit for the 18th Wing, a function you can read more about in our interview with the wing’s commander.
A first F-15EX Eagle II designated for Kadena Air Base, Japan, taxis at Boeing’s St. Louis facility. U.S. Air Force photo by Senior Airman Melany Bermudez This departure represents a critical, long-awaited milestone for the 18th Wing, which has been working toward the permanent stationing of the service’s most advanced Eagle variant to replace its now-withdrawn F-15C/D fleet. The arrival of the F-15EX in Japan, expected to begin in fiscal year 2027, which begins on October 1, 2026, will be a central pillar in the Air Force’s modernization of tactical airpower in the Indo-Pacific region.
“This is an important next step toward bringing the F-15EX home to Kadena,” said Brig. Gen. John Gallemore, 18th Wing commander, in an Air Force release. “Our team is ready to welcome the F-15EX, and this is another milestone that brings us closer to putting this capability in the hands of the airmen who will fly, maintain and employ it from Japan.”
The first F-15EX for Kadena Air Base, Japan, at Boeing’s St. Louis facility last month. U.S. Air Force photo by Senior Airman Melany Bermudez The first F-15EX for Kadena’s 18th Wing, serial 22-0022, was noted flying test sorties from St. Louis in early August, initially in primer paint. By the middle of the month its was flying with its full livery, including the famous “ZZ” tail code.
The F-15EX is a significant jump in capability over the legacy Eagles. With modernized avionics, flight controls, an expanded electronic warfare suite, and increased weapons carriage — as well as potentially new and longer-reaching weapons — the jet is well-suited to operating in the vast Western Pacific. As Kadena prepares for the permanent arrival, the 18th Wing plans to integrate the EX with regional allies, including the Japan Air Self-Defense Force, building upon existing bilateral training exercises.
A U.S. Air Force F-15EX Eagle II and F-15E Strike Eagles assigned to 85th Test and Evaluation Squadron, Eglin Air Force Base, Florida, land at Kadena Air Base in June 2026. U.S. Air Force photo by Airman 1st Class Gracelyn Hess Two active-duty squadrons of F-15EXs are set to be established at Kadena, taking the place of units previously based there that had flown F-15Cs. The Air Force has been deploying F-15Es, F-22s and other fighters to the base on a rotational basis to fill the gap in the meantime.
The F-15EX will give U.S. forces in the Indo-Pacific a high-capacity platform that complements the fifth-generation F-22 and F-35. With its ability to carry large air-to-air and air-to-surface payloads, the Eagle II can serve as a long-range “missile truck,” extending the reach and firepower of stealth aircraft operating closer to contested airspace. Its open-architecture systems also allow it to incorporate new sensors, weapons, and electronic warfare capabilities more readily than the aging F-15C/D fleet.
The first F-15EX designated for Kadena Air Base, Japan, is photographed at Boeing’s St. Louis facility, on August 28, 2026. U.S. Air Force photo by Senior Airman Melany Bermudez The aircraft’s value is also tied to its role in networked operations. Exercises such as Valiant Shield have demonstrated how the F-15EX can work with uncrewed aircraft like the MQ-28 Ghost Bat, pointing toward mixed formations in which crewed fighters provide weapons, sensing, and command-and-control capacity for autonomous wingmen. Operating from strategic locations such as Kadena, the Eagle II could help the Air Force generate more combat power across the vast Pacific while reducing the burden on its limited number of stealth fighters.
A U.S. Air Force F-15EX Eagle II accompanies an MQ-28 Ghost Bat during the U.S.-led Valiant Shield 26 military exercise. PACAF Kadena will become the second Air Force location with combat-coded F-15EX aircraft, following the Oregon Air National Guard’s 142nd Wing.
The Air Force has previously announced plans to stand up National Guard F-15EX squadrons in California, Louisiana, and Michigan. Most recently, the Air Force announced plans to put F-15EX fighters at Seymour Johnson Air Force Base, North Carolina, to replace older F-15E Strike Eagle jets that will move to Whiteman Air Force Base, Missouri.
While the movement of this first Kadena-bound F-15EX is a positive step, the wider Eagle II program is currently navigating some issues. According to a new Pentagon selected acquisition report released in August, the Air Force’s decision to aggressively expand its F-15EX fleet from 129 to 267 jets — intended to recapitalize the older F-15E force — has introduced substantial cost and schedule uncertainties that officials are now scrambling to manage.
The first F-15EX designated for Kadena Air Base, Japan, taxis at Boeing’s St. Louis facility, before departing for Portland Air National Guard Base, Oregon. U.S. Air Force photo by Senior Airman Melany Bermudez The report warns that the extended acquisition strategy, which shifted from eight production lots to 12, will require Boeing to execute a “major technical refresh” to combat diminishing manufacturing sources and material shortages. As systems like the radar, mission computer, and engines face potential obsolescence over the now-lengthened production timeline, the service faces what the report characterizes as a “significant redesign effort.” Program managers are planning to mitigate these risks by integrating upgrades through operational flight program releases scheduled between 2031 and 2035, a strategy they describe as a “structured, risk-reduced pathway” to avoid production line gaps.
Compounding these technical challenges are tangible production delays, largely stemming from a labor strike at the St. Louis plant from August to November 2025. The report notes that these are “unrecoverable delays,” forcing a cascading schedule slip. While Boeing was contracted to deliver all 12 jets from Lot 3 by early 2026, the company will only be able to field half of those by the end of the year. This has directly impacted the timeline for the Kadena deployment, which was originally envisioned for earlier in 2026, and has left the Air Force relying on “bridging strategies” and rotations to cover operational requirements until the Eagle IIs can fully stand up in Okinawa.
The first F-15EX for Kadena Air Base, Japan, flies en route to Portland Air National Guard Base, Oregon, after departing Boeing’s St. Louis facility, on August 28, 2026. U.S. Air Force photo by Senior Airman Melany Bermudez The Pentagon is now moving toward an aggressive production ramp-up, tasking Boeing to hit a rate of two jets per month. Keeping the F-15EX schedule on track will be a challenge, however, requiring successfully navigating ongoing parts shortages for critical systems, all while balancing the needs of foreign military sales customers who are also integrated into the supply chain.
For the 18th Wing, the arrival of the first F-15EX will bring a major advance in capabilities in a part of the world that needs them badly. At the same time, the program’s overall trajectory suggests that the wider transition to the new Eagle will come with some complex logistical and industrial challenges.
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