 It was also used to attack targets as far-flung as western China, India and northern Australia.In 1936, Imperial Japanese Army Air Service issued a requirement for a new heavy bomber to replace both the Ki-20 (Army Type 92 Heavy Bomber) and the Ki-1 (Army Type 93 Heavy Bomber).The design called for a crew of at least four, top speed of , endurance of at least five hours, and a bombload of .