•Kawanishi H8K ??: VIP transport version.1 Could carry 29 passengers.1
•Kawanishi H8K2-L Seika (Clear Sky): Transport version that could carry 64 passengers.1,2,3 Had Mitsubishi MK4Q engines and not as many weapons.1 The engines drove Hamilton propellars.1
•Kawanishi H8K1: First production version.2
•Kawanishi H8K2: Used more powerful engines.2 The armament was increased.2 Starting in 1943 a few had ASV (air surface vessel) radar installed.2
•Kawanishi H8K3: Had additional armor protection.2 The wing tip floats were retractable.2
•Kawanishi H8K4: Was the H8K3 modified by fitting Kasei 25b engines.2
