Japan Deploys F-15Js to Europe for First Time in Atlantic Eagles 2025 Exercise

For the first time in history, Japan has deployed its F-15J Eagle fighter aircraft to Europe as part of the Atlantic Eagles 2025 multinational exercise. The deployment marks a significant milestone in Japan’s evolving defense posture and highlights growing interoperability between the Japan Air Self-Defense Force (JASDF) and NATO-aligned air forces.

Historic First for Japanese Fighter Aviation

On September 14, 2025, six Mitsubishi F-15J fighters from the JASDF’s 201st Tactical Fighter Squadron departed Chitose Air Base in Hokkaido en route to Europe. The aircraft are participating in Atlantic Eagles 2025, a bilateral training exercise hosted by U.S. Air Forces in Europe (USAFE). This marks the first-ever deployment of Japanese fighter aircraft to European airspace—a major symbolic and operational milestone.

The deployment includes approximately 130 JASDF personnel, including pilots, maintenance crews, and support staff. The contingent is supported by a pair of Kawasaki C-2 strategic airlifters and a KC-767 aerial refueling tanker. After transiting via Alaska and Canada, the fighters are expected to arrive at RAF Lakenheath in the United Kingdom before dispersing to other bases for joint training with U.S., UK, and NATO partner forces.

Strategic Significance of Atlantic Eagles

Atlantic Eagles is designed to enhance tactical interoperability between U.S. and allied fourth-generation fighter platforms through dissimilar air combat training (DACT), integrated mission planning, and combined force operations. While previous iterations have included European partners such as Germany or Italy, this year’s inclusion of Japan reflects an expanding trans-regional security architecture connecting Indo-Pacific allies with Euro-Atlantic defense structures.

This deployment supports broader U.S.-Japan strategic objectives outlined in recent bilateral defense agreements emphasizing global mobility and increased joint operations beyond East Asia. It also aligns with NATO’s Global Partners framework that seeks deeper engagement with capable non-member states like Japan.

The F-15J Eagle: Still Relevant After Four Decades

The Mitsubishi-built F-15J, based on the McDonnell Douglas F-15C/D design but tailored for Japanese requirements under license production by Mitsubishi Heavy Industries (MHI), remains central to JASDF’s air superiority mission. Though originally delivered starting in the early 1980s, many of these aircraft have undergone extensive upgrades under programs such as the Multi-stage Improvement Program (MSIP).

Powerplant: Two Pratt & Whitney F100-PW-100 turbofans
Radar: AN/APG-63 or upgraded variants; some MSIP jets now carry AESA radars (e.g., J/APG-1)
Armament: AIM-7 Sparrow, AIM-9 Sidewinder variants; newer configurations support AAM-4B active radar-guided missiles
Cockpit: Modernized glass cockpit with MFDs on upgraded units

The participating aircraft are believed to be among those upgraded under MSIP or further enhanced under Japan’s ongoing modernization program aimed at extending operational viability into the early 2030s until full transition toward next-generation platforms like the F-X fighter occurs.

Airlift and Tanker Support Enable Global Reach

The transcontinental movement of fighter assets was made possible through coordinated use of JASDF’s strategic enablers—namely its fleet of Kawasaki C-2 transport aircraft, which carried ground support equipment and personnel—and Kawasaki KC-767 aerial refueling tankers. These capabilities underscore how far Japan’s expeditionary logistics have matured since its post-WWII pacifist constitution limited overseas deployments.

The KC-767s provided mid-air refueling during long legs over Alaska and Canada. This capability not only ensures safe transit but also demonstrates interoperability with allied tanker procedures—a critical feature during coalition operations or contingency deployments.

Tactical Objectives and Training Focus Areas

The Atlantic Eagles exercise will focus on a range of tactical scenarios including:

Dissimilar Air Combat Training (DACT) between F-15Js and USAF/RAF Typhoons or F/A-18s
BVR (Beyond Visual Range) intercept drills using AAM-equipped platforms
Aerial refueling integration missions with USAF KC-series tankers
C4ISR coordination using Link 16 datalink protocols across national platforms
Aggressor-style adversary air role-playing by Japanese pilots simulating threat tactics based on regional knowledge from East Asia

This type of multilateral training enhances both pilot proficiency and command-and-control integration—key elements for coalition readiness against peer threats like Russia or China.

A Broader Shift Toward Global Engagement by Japan’s Military Forces

This deployment is emblematic of a broader shift within Japanese defense policy toward proactive international engagement. Recent years have seen increased participation by JASDF units in exercises such as Cope North (Guam), Pitch Black (Australia), Red Flag-Alaska (U.S.), and now Atlantic Eagles (Europe).

This trend is supported by legislative reforms passed since 2015 that reinterpret Article 9 of Japan’s constitution to permit collective self-defense operations abroad under certain conditions. Concurrently, Tokyo has boosted defense spending—reaching ¥7 trillion ($47 billion USD) annually—and is investing heavily in next-gen systems including stealth fighters, long-range missiles, space-based ISR assets, cyber units, and hypersonic R&D programs.

NATO-Japan Interoperability: Growing but Still Limited by Systems Gaps

While symbolic progress is evident through this deployment, practical challenges remain regarding full interoperability between Japanese systems—many domestically developed—and NATO-standard equipment. For example:

Datalinks: Not all JASDF aircraft natively support Link 16 without additional pods or integration layers.
Ammunition types: Some missile types used by JASDF differ from NATO-standard munitions logistics chains.
C4ISR doctrine: Operational concepts differ due to distinct regional threat models; harmonization takes time.
Ejection seats/ILS avionics: Variants differ slightly due to domestic production standards set by MHI/Kawasaki vs Western OEMs like BAE or Lockheed Martin.

This makes exercises like Atlantic Eagles crucial testbeds not just for flight operations but also backend systems compatibility assessments—key prerequisites for any future coalition operation involving Japanese assets beyond Asia-Pacific theaters.

Conclusion: A Strategic Signal Beyond Training Value Alone

The arrival of Japanese F-15Js over European skies sends a clear message: Tokyo is no longer limiting itself solely to regional security concerns but views global partnerships—including those anchored around NATO—as vital components of its national defense strategy. While symbolic at one level, this deployment also offers real-world operational benefits—from refining long-range logistics chains to validating multi-domain coordination frameworks alongside trusted allies.

If successful—and early indications suggest it will be—the Atlantic Eagles deployment may pave the way for more frequent cross-theater engagements involving Japanese forces across Eurasia and beyond.