I-22 was a Type C submarine of the Imperial Japanese Navy. She took part in the attack on Pearl Harbor. On 7 December 1941 she was off Oahu. That was the day of her recorded part in the attack.
From an offshore position she launched a midget submarine. I-22 stayed outside and did not enter the harbor. After October 1942 she was missing. The hull is carried as sunk. A patrol plane is sometimes credited with the loss. The cause is not settled.
