Nakajima Ki-84 Hayate "Frank"
Fastest Imperial Army fighter in WWII

The Nakajima Ki-84 Hayate (キ84 疾風, lit. "Gale") is a single-seat fighter flown by the Imperial Japanese Army Air Service in the last two years of World War II. The Allied reporting name was "Frank"; the Japanese Army designation was Army Type 4 Fighter (四式戦闘機, yon-shiki-sentō-ki). The Ki-84 is generally considered the best Japanese fighter to operate in large numbers during the conflict.