Nobody really likes substitutes however until some of the planesets are filled out...
I personally don't have a problem if it adds a historical situation that cannot otherwise be recreated and if the sub is a close match. There is no heavy Japanese fighter to add to this scenario. However the BF-110C is a very close match.
Specifications Ki-45
Data from Japanese Aircraft of the Pacific War [2]
General characteristics
Crew: Two
Length: 11.00 m (36 ft 1 in)
Wingspan: 15.02 m (49 ft 4 in)
Height: 3.70 m (12 ft 2 in)
Wing area: 32.0 m² (344 ft²)
Empty weight: 4,000 kg (8,820 lb)
Loaded weight: 5,500 kg (12,125 lb)
Powerplant: 2× Mitsubishi Ha-102 14-cylinder radial engines, 783 kW (1,050 hp) each
Performance
Maximum speed: 540 km/h (292 kn, 336 mph)
Range: 2,000 km (1,081 nmi, 1,243 mi)
Service ceiling: 10,000 m (32,800 ft)
Rate of climb: 11.7 m/s (2,300 ft/min)
Wing loading: 171.9 kg/m² (35 lb/ft²)
Power/mass: 0.26 kW/kg (0.16 hp/lb)
Armament
Ko: 1 × 20 mm, 2 × 12.7 mm (.50 in), 2 × 7.92 mm (.312 in)
Otsu: 1 × 37 mm (1.46 in), 2 × 12.7 mm (.50 in), 1 × 7.92 mm (.312 in)
Hei: 1 × 37 mm (1.46 in), 1 × 20 mm, 1 × 7.92 mm (.312 in)
Tei: 1 × 37 mm (1.46 in), 2 × 20 mm
Bo: 1 × 40 mm (1.57 in)
Comparable aircraft
Fw 187
Westland Whirlwind
Messerschmitt Bf 110
Specifications Messerschmitt Bf 110 C-4
Data from[citation needed]
General characteristics
Crew: 2 (3 for night fighter variants)
Length: 12.3 m (40 ft 6 in)
Wingspan: 16.3 m (53 ft 4 in)
Height: 3.3 m (10 ft 9 in)
Wing area: 38.8 m² (414 ft²)
Empty weight: 4,500 kg (9,921 lb)
Loaded weight: 6,700 kg (14,771 lb)
Powerplant: 2× Daimler-Benz DB 601B-1 liquid-cooled inverted V-12, 809 kW (1,100 PS (1,085 hp)) each
Performance
Maximum speed: 560 km/h (348 mph)
Range: 2,410 km (1,500 mi)
Ferry range: 2,800 km (1,750 mi)
Service ceiling: 10,500 m (35,000 ft)
Wing loading: 173 kg/m² (35.7 lb/ft²)
Power/mass: 0.3644 kW/kg (0.155 hp/lb)
Armament
Guns:
2 × 20 mm MG FF/M cannons (180 rpg - 3 drums with 60 rpg, cannon were reloaded by rear gunner or radio operator during flight)
4 × 7.92 mm (.312 in) MG 17 machine guns (1,000 rpg)
1 × 7.92 mm (.312 in) MG 15 machine guns for defense
Comparable aircraft
Bristol Beaufighter
de Havilland Mosquito
Focke-Wulf Fw 187 Falke
Fokker G.I
Kawasaki Ki-45
Nakajima J1N
P-38 Lightning
Petlyakov Pe-2
PZL.38 Wilk
Westland Whirlwind