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 .
Japanese submarine tender Chōgei
, was the second and final vessel of the s operated by the Imperial Japanese Navy, from the 1920s through World War II. Along with her sister ship , she was the first purpose-built submarine tender in the Imperial Japanese Navy.