Japan to Test F-35B Aircraft with JS Kaga Off San Diego

Japan is embarking on a significant phase of its military modernization with the upcoming operational tests of the JS Kaga, an Izumo-class helicopter carrier, off the coast of San Diego. This exercise marks a critical step in Japan's effort to enhance its naval capabilities by integrating Lockheed Martin's F-35B stealth fighter jets into its fleet.

The JS Kaga, officially designated as a "helicopter destroyer" by the Japan Maritime Self-Defense Force (JMSDF), has undergone substantial modifications to enable it to operate the F-35B aircraft. These modifications are part of a broader initiative to transform the Izumo-class carriers into full-fledged light aircraft carriers capable of supporting short takeoff and vertical landing (STOVL) operations.

The tests, supported by the U.S. Navy, are aimed at collecting essential operational data for the F-35B's deployment on these modified carriers. The trials will include critical evaluations of short takeoff and vertical landing procedures, as well as general on-board operations of the F-35B. These activities are crucial for ensuring that the JS Kaga is fully prepared to handle the advanced aircraft and support its operational requirements.

The operational tests are a key component of the JS Kaga's "Indo-Pacific Deployment 2024" (IPD24) mission. This deployment reflects Japan's strategic pivot towards strengthening its naval presence and capabilities in the Indo-Pacific region.

The modification work on the JS Kaga began in March 2022 at Japan Marine United's Kure shipyard in Hiroshima. This refit includes several major changes: the flight deck's bow section was redesigned from a trapezoidal to a square shape, similar to the designs seen on the U.S. Navy's Wasp-class and America-class amphibious assault ships. The deck has also been reinforced to handle the additional weight of the F-35Bs, and features new guidance lights and heat-resistant spots for safe vertical landings.

Japan's Ministry of Defense plans to acquire a total of 42 F-35B aircraft, alongside 105 F-35A models. The F-35Bs will be stationed at the Japan Air Self-Defense Force’s (JASDF) Nyutabaru Air Base on Kyushu Island. This strategic deployment aims to bolster Japan's defense capabilities, particularly around its remote southern islands and the contested Senkaku/Diaoyu Islands.

The successful integration of the F-35B with the JS Kaga and its sister ship, the JS Izumo, represents a significant enhancement in Japan’s maritime air power and strategic reach, aligning with broader regional security goals.