Submarines of the Imperial Japanese Navy
The submarines ("I-52"-class) were submarines of the Imperial Japanese Navy, designed and built by Mitsubishi Corporation, between 1943 and 1944, as cargo carriers. They were quite long and carried a crew of up to 94 officers and enlisted. They also had a long cruising range at a speed of .
Type D submarine
The , also called or was a type of the 1st class submarine in the Imperial Japanese Navy serving during the Second World War. The type name, was shortened to .