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Japan's Tachikawa Ki-94 high altitude fighter


  • Tachikawa Ki-94 high altitude fighter
  • Tachikawa Ki-94-II high altitude fighter


In mid 1942 the Koku Hombu and Tachikawa Hikoki K.K. discussed creating a high altitude heavily armed fighter. The Japanese Army wanted an aircraft that had these specifications:

  • Pressurized cabin
  • Speed of 497 mph / 800 kph
  • Range of 1,864 miles / 3,000 km

Initial Design

The initial design had twin booms that had two Mitsubishi Ha-211 Ru (2,200 HP) engines in a push pull setup. The armament was to be two 37 mm Ho-203 and two 30 mm Ho-105 cannons. It was anticipated that it could go 485 mph / 780 kph at 32,810' / 10,000 m.

A wooden mock up was completed in 1943. The Koku Hombu decided the project was too complex and development was to be stopped.

New Design

Tachikawa then proposed a more conventional design with a pressurized cabin. It was to have a Nakajima Ha-44 12 (2,400 HP) engine driving a six blade propeller. It was to be armed with two 30 mm Ho-105 and two 20 mm Ho-5 cannons.

The Koku Hombu ordered a static airframe, three prototypes, and eighteen pre-production aircraft that were to be designated the Ki-94-II.


The Tachikawa Ki-94-II prototype was completed in August 1945. The six blade propeller wasn't completed in time so a four blade was installed. The war ended before it flew.


  • Tachikawa Ki-94-II prototype: 1
  • Manufacturer: Tachikawa Hikoki K.K.
  • Production: August 1945


  • Tachikawa Ki-94-I: Twin booms. Only a wooden mockup built.
  • Tachikawa Ki-94-II: Conventional design.


Type High Altitude Fighter
Crew 1
Engine (Type) Nakajima Ha-44 12
Cylinders Radial 18
Cooling Air
Net HP 2,400
Propeller blades 6 metal
Span 45' 11 3/16"
14 m
Length 39' 4 7/16"
12 m
Height 15' 3 1/16"
4.65 m
Wing Area 301.388 sq ft
28 sq m
Empty 10,340 lb
4,690 kg
Loaded 14,220 lb
6,450 kg
Speed at 39,370' / 12,000 m 442 mph
712 kph
Speed - Cruising 29,530' / 9,000 m 273 mph
440 kph
Climb to 32,810' / 10,000 m 17 minutes 38 seconds
Service Ceiling 48,170'
14,680 m
Range 1,305 miles
2,100 km
Wings 2: 30 mm Ho-105 cannon
2: 20 mm Ho-5 cannon
Bombs 1: 1,102 lb
1: 500 kg


  1. Japanese Aircraft of the Pacific War, René J Francillon, 1970
20th Century American Military History Crucial Site