有过设计,但没造出来
J4M閃電

General characteristics
Crew: 1
Length: 12.98 m (42 ft 7 in)
Wingspan: 12.49 m (41 ft 0 in)
Height: 3.47 m (11 ft 5 in)
Wing area: 22 m2 (240 sq ft)
Empty weight: 3,400 kg (7,496 lb)
Gross weight: 4,400 kg (9,700 lb)
Max takeoff weight: 5,255 kg (11,585 lb)
Powerplant: 1 × Mitsubishi MK9D 18-cyl. two-row fan assisted air-cooled radial piston engine, 1,600 kW (2,100 hp) at take-off
1,416.8 kW (1,900 hp) at 2,000 m (6,562 ft)1,230.4 kW (1,650 hp) at 8,000 m (26,247 ft)
Propellers: 6-bladed metal constant speed propeller, 3.2 m (10 ft 6 in) diameter
Performance
Maximum speed: 756 km/h (470 mph; 408 kn) at 8,000 m (26,247 ft)
Cruising speed: 462 km/h (287 mph; 249 kn)
Landing speed: 147 km/h (91 mph)
Endurance: 2 hours 12 minutes
Service ceiling: 12,000 m (39,370 ft)
Rate of climb: 8.89 m/s (1,750 ft/min)
Time to altitude: 8,000 m (26,247 ft) in 15 minutes
Wing loading: 199.69 kg/m2 (40.90 lb/sq ft)
Armament
Guns: 1x 30mm Type 5 cannon with 100 rounds + 2x 20mm Type 99 cannon with 200 rounds per gun in the fuselage nose
Bombs: provision for 2x 30 kg (66 lb) or 2x 60 kg (132 lb) bombs