The J2M5 Model 33 (30 mm), designated as Raiden Mod.33 (Prototype) (雷電三三型 (原型)), is a prototype of the J2M5 replacing the four 20 mm cannons with two 30 mm Type 5 cannons. Due to lack of material and manpower, as well as constant bombing, it never entered production lines.

It was introduced in Update 1.51 "Cold Steel". While offering the same flight characteristics as the Raiden it was based on, its armament is of a different calibre, both physically and in usage. The Type 5 30 mm's this J2M5 carries offer a lot of punch for a very limited ammo capacity, so it's up to the pilot to make every trigger pull count.