The Aichi M6A was to be the only submarine borne offensive aircraft produced during World War II.
The Aichi M6As were to be carried on I-400 Class submarines that would have a watertight hanger that could carry three M6As and launch them by catapult on the deck.
Aichi was ordered in 1942 to design the Navy Experimental 17-Shi Special Attack Bomber that would be used on the I-400s. Aichi designated the design the AM-24 and the design team was led by Norio Ozaki, Yasushiro Ozawa, and Morishige Mori.
The M6A1s could be assembled and ready for flight in seven minutes by four trained crewman. Fluorescent paint was added to the important parts to aide assembly in the dark.
The wings folded back to lie flat along the fuselage. The horizontal tail surfaces folded down.
If necessary the floats could be jettisoned for aerial combat.