The Ki-84 was a Japanese fighter aircraft used during World War II. Developed by Mitsubishi, it was designed to compete with Allied fighters, featuring a powerful engine and advanced aerodynamics. The Ki-84 was known for its speed, agility, and firepower, making it one of the most effective Japanese fighters of the war. First flown in 1943, the Ki-84 entered service in 1944 and quickly gained a reputation for its performance in combat. It was equipped with a 20mm cannon and machine guns, allowing it to engage effectively against enemy aircraft. The Ki-84 played a significant role in defending Japan during the latter stages of the war.