The Japan News by The Yomiuri Shimbun
Kaga’s carrier deck modified to accommodate F-35B
The Maritime Self-Defense Force showed the multi-functional helicopter carrier Kaga to the press on April 8 at its base in Kure, Hiroshima Prefecture, after modifications to make it capable of accommodating fixed-wing fighter jets were completed.
The modifications made the helicopter carrier capable of also operating as a de facto aircraft carrier.
The major change is in the shape of the flight deck, which is now completely rectangular, enabling fighter jets to take off safely.
From now on, the Kaga will serve as a seagoing base on which F-35Bs, the latest stealth fighters, will take off and land.
The Kaga is Japan's second Izumo-class helicopter carrier. The Izumo-class vessels, with an overall length of 248 meters, are the largest surface combat ships in the MSDF fleet.
In the 2018 medium-term defense program, the government stipulated that the two Izumo-class ships would be made capable of operating as de facto aircraft carriers to strengthen warning and surveillance ability, and to enhance the MSDF's air defense capabilities in the event of contingencies.
The F-35B fighters to be accommodated by the Izumo-class ships can direct their jet engine nozzles downward. Thus, the fighters can take off from a short runway and land
vertically.
The Izumo, the first ship of the class, already received the first stage of its modification, but that work only added heat-resistant paint to its flight deck so that the surface can endure the exhaust from jet engines.
The Kaga is the first MSDF ship for which the flight deck was made rectangular, similar to a full-scale aircraft carrier.
The modification work
on the Kaga began in March 2022 and was completed on March 29 this year.
According to senior Defense Ministry officials, modifying the shape of the forward part of the flight deck from a trapezoid to a rectangle reduces the turbulence of air flows from the direction of the bow, and thus increases stability for fighter jet takeoffs.
The Kaga will receive second-stage modifications starting in fiscal 2026. Facilities inside the ship's hull will be altered.
On April 8, the ship's captain told reporters, “By obtaining an additional capability of operating F-35Bs, flexibility [in operations] can be enhanced.”
The Izumo is scheduled to begin receiving its second-stage modifications within this fiscal year.
A few years later, the MSDF will establish the Izumo and the Kaga as its two de facto aircraft carriers.
The government's position has long been that Japan is not allowed to possess attack-type aircraft carriers for conducting airstrikes on foreign soil.
But concerning the Izumo-class ships after the modifications, the government states that they remain the minimum equipment necessary for self-defense, and so possessing them is alright.