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 I-73
The Japanese submarine "I-73" was a "Kaidai" type cruiser submarine of the KD6A sub-class built for the Imperial Japanese Navy (IJN) during the 1930s. One month after participating in the IJN's attack on Pearl Harbor, she was sunk by United States Navy submarine USS "Gudgeon".