I have re-examined the historical context of the R2Y2. To clarify, the R2Y2 is not a jet fighter but a high-speed torpedo bomber. While the R2Y2 V2 to V3 variants may need to be removed from the game, there is room to retain the R2Y2 V1 for naval battles by removing its cannons and adding torpedoes. Alternatively, I propose replacing it entirely with the late-model R2Y1, which was historically reclassified from a reconnaissance aircraft to a torpedo bomber. Even in the initial design phase of the R2Y1 reconnaissance aircraft, there was a payload option to carry two 800-liter drop tanks.
By autumn 1944, the Keiun R2Y1 reconnaissance aircraft project was on the verge of cancellation due to Japan’s deteriorating war situation. However, a new plan emerged for the Keiun Kai R2Y2.
The Keiun Kai R2Y2 was designed to be equipped with two Mitsubishi Ne-330 turbojet engines (producing 1,320 kgf of thrust each at ground level) in a twin-engine configuration. It aimed to achieve a maximum speed of 796 km/h at sea level, maintain nearly consistent high-speed performance up to 8,000 meters, and have a range of 1,202 km. The aircraft was intended to carry torpedoes or bombs. Crucially, the conversion from the Keiun R2Y1 required minimal modifications: removing its original twin piston engines and replacing the space with fuel tanks. The project could proceed rapidly once the jet engines were completed.
The Imperial Japanese Navy took keen interest in the Keiun Kai R2Y2. However, some argued that completing the original Keiun R2Y1 prototype was essential first, to test the airframe’s performance, handling, and stability. As a result, the first prototype of the Keiun R2Y1 was prioritized for completion.
Spoiler
Okamura, Jun & Iwaya, Eiichi (1960). Nihon no Kōkūki: Kaigun-ki Hen [Japanese Aircraft: Naval Aircraft Volume]. p. 201.
Diagrams of R2Y1 and R2Y2 V1, with an explanation that they can be equipped with drop tanks and bombs.
Spoiler
Hagiwara, Shiro & Akimoto, Minoru (Eds.). (1962). Nihon Gun’yōki Sanmenzu-shū [Dai 2] (Kaigun-ki Hen) [Collection of Three-View Drawings of Japanese Military Aircraft, Vol. 2 (Naval Aircraft Volume)]. p. 154, 159, 200.