Giant Japanese WWII Submarine Discovered Off The Coast Of Hawaii

Up until the 1960s, the I-400 class Imperial Japanese Navy submarines were the largest submarines ever built. The I-400 submarines were aircraft carriers made to launch three Aichi M6A Seiran amphibious aircraft during World War II. When the tide turned against the Japanese and their fleet no longer had free rein in the Pacific, the Commander-in-Chief of the Japanese Combined Fleet, Admiral Isoroku Yamamoto, devised a plan to attack New York, Washington D.C., and other large American cities with the I-400. Fortunately, the war ended before the attacks could be carried out and the Japanese vessels were sank in 1946, lost forever to the sea…until now.

Recently, researchers from the University of Hawaii and National Oceanic and Atmospheric Administration announced that they have found important pieces of the I-400 scuttled after the war.