was the last major Japanese naval operation in the Pacific Theater of World War II. Other renderings of this operation's title in English include Operation Heaven One and Ten-ichi-gō. In April 1945, the Japanese battleship Yamato (the largest battleship in the world)—along with nine other Japanese warships—embarked from Japan on a deliberate suicide attack upon Allied forces engaged in the Battle of Okinawa. The Japanese force was attacked, stopped, and almost completely destroyed by United States carrier-borne aircraft before reaching Okinawa. Yamato and five other Japanese warships were sunk.