Shinano was an aircraft carrier built by the Imperial Japanese Navy (IJN) during World War II. Initially laid down as the third of the Yamato-class battleships, Shinano ’s partially complete hull was converted to a supercarrier in 1942, midway through construction.
The ship carried an inexperienced crew, had serious design and construction flaws, and was not ready for combat. Over a thousand of her crew and passengers were rescued, but 1,435 sailors and civilians died, including her captain. Shinano remains the largest warship ever sunk by a submarine. Over the next two years, the ship was heavily modified and she became the largest aircraft carrier built up to that time. The ship carried an inexperienced crew, had serious design and construction flaws, and was not ready for combat.