AircraftKi-84-IKi-84-IKi-84-IFamilyKi-84 HayateClassFighterChangesProduction fighter with the Ha-45 Homare 18-cylinder radial and a four-blade constant-speed propeller.Service193119321933193419351936193719381939194019411942194319441945Japan · China≈ Aug 1944 – Aug 1945Japan · Pacific≈ Oct 1944 – Aug 1945Modifications 3193119321933193419351936193719381939194019411942194319441945Ki-84-Ia≈ Aug 1944 – Aug 1945≈ Oct 1944 – Aug 1945Ki-84-IbKi-84-Ic