The Japanese submarine I-176 (I-76, until 20 May 1942) was a "Kaidai" type of cruiser submarine active in World War II. A KD7 sub-class boat, I-176 was built for the Imperial Japanese Navy (IJN) in the early 1940s. The most successful submarine of her class, she severely damaged the heavy cruiser USS Chester in October 1942 and sank the submarine USS Corvina in November 1943, the only Japanese submarine to sink one of her American counterparts. I-176 was sunk in May 1944 in the western Pacific by the American destroyers Franks, Haggard and Johnston.