Yamato (憭批??), named after the ancient Japanese Yamato Province, was the lead ship of the Yamato class of battleships that served with the Imperial Japanese Navy during World War II. She and her sister ship, Musashi, were the heaviest and most powerfully armed battleships ever constructed, displacing 72,800 tonnes at full load and armed with nine 46 cm (18.1 inch) main guns. Neither ship survived the war.

Laid down in 1937 and formally commissioned a week after the Pearl Harbor attack in late 1941, Yamato was designed to counter the numerically superior battleship fleet of the United States, Japan's main rival in the Pacific. Throughout 1942 she served as the flagship of the Japanese Combined Fleet, and in June 1942 Admiral Isoroku Yamamoto directed the fleet from her bridge during the Battle of Midway, a disastrous defeat for Japan.

During 1944, the balance of naval power in the Pacific decisively turned against Japan and, by early 1945, the Japanese fleet was much depleted and critically short of fuel stocks in the home islands, limiting its usefulness. In April 1945, in a desperate attempt to slow the Allied advance, Yamato was dispatched on a one way voyage to Okinawa, where it was intended that she should protect the island from invasion and fight until destroyed. The task force was spotted south of Kyushu by US submarines and aircraft, and on 7 April 1945 she was sunk by American carrier-based bombers and torpedo bombers with the loss of most of her crew.