Overview

• A UK-operated F-35B executed the first-ever landing and vertical launch from the Japan Maritime Self-Defense Force carrier JS Kaga during a nine-day exercise.
• Four carriers—HMS Prince of Wales, JS Kaga, USS George Washington and USS America—conducted integrated fifth-generation operations focused on maritime strike and tactical intercept drills.
• One UK F-35B diverted to Kagoshima Airport on August 10 after an in-flight malfunction and remains grounded pending spare parts, spotlighting sustainment challenges.
• Royal Navy and Royal Air Force engineers have assessed the stranded jet and confirmed its repair depends on international supply-chain deliveries.
• Operation Highmast’s conclusion reinforces UK, US and Japanese interoperability as part of a wider Indo-Pacific deterrence posture.