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 .
Submarines of the Imperial Japanese Navy
The ("I-40"-class) submarines ("I-40", , "I-42", "I-43", "I-44", "I-45") were externally similar to the Type B1, but with a high-tensile strength steel hull and diesel engines of a simpler design.