Unsinkable: Japan's Lost Battleship Released 2020-03-09 is a story that falls under the Documentary, History, War category. Movie Story "October 24, 1944, the world’s greatest battle at sea begins in the Philippines. Japan’s navy gambles on a decisive victory against the United States to turn the tide of World War II. Instead, Musashi, its top-secret super battleship, ends up at the bottom of the ocean.".