Model Variants (Including Prototypes)
Navy Type 97 Flying Boat - Initial Production Designation.
H6K1 - Initial Production Evaluation Models; four produced; fitted with 4 x Nakajima Hikari 2 type engines.
H6K1 (Navy Flying Boat Type 97 Model 1) - Follow-up prototype model but fitted with Mitsubishi Kinsei 43 type engines; 3 produced.
H6K2 Model 11 - Initial Production Model; 10 produced.
H6K2-L (Navy Transport Flying Boat Type 97) - Based on the H6K2 model but powered with Mitsubishi Kinsei 43 engines; sans armament; 16 produced.
H6K3 Model 21 - VIP Transport Conversion Model based on the H6K2; only 2 produced.
H6K4 Model 22 - Full-Scale Production Version; fitted with 4 x Mitsubishi Kinsei 43 radial engines of 930 horsepower; 10 produced; increased fuel capacity; revised defensive armament; capability for torpedo and bomb load out as needed.
H6K4-L - Dedicated transport model of the H6K2-L; fitted with Mitsubishi Kinsei 46 series engines; 20 produced; seating for 18 troops.
H6K5 Model 23 - Fitted with Mitsubishi 51 OR 53 series engines of 1,300 horsepower; open dorsal gun position replaced by enclosed turret; 36 produced.