The
Fugaku had its origins in "
Project Z (bomber project)", a 1942
Imperial Japanese Army specification for an intercontinental bomber which could take off from the
Kuril Islands, bomb the
contiguous United States, then continue onward to land in
German-occupied France. Once there, it would be refueled and rearmed and make another return sortie. Project Z called for three variations on the airframe: heavy bomber, transport (capable of carrying 300 troops), and a gunship armed with forty downward-firing
machine guns in the
fuselage for intense
ground attacks at the rate of 640 rounds per second (i.e. 38,400 rounds per minute). Development was initiated in January 1943 and a design and manufacturing facility built in
Mitaka, Tokyo. Nakajima's 4-row 36-cylinder 5,000 hp Ha-54 (Ha-505) engine was abandoned as too complex. Project Z was cancelled in July 1944, and the
Fugaku was never built. ==Operators (planned)==