Nagato was a battleship of the Imperial Japanese Navy, the lead ship of her class. She was the first battleship in the world to mount 16 inch (actually 16.1 inch, or 410 mm) guns, her armour protection and speed made her one of the most powerful capital ships at the time of her commissioning.
She was the flagship of Admiral Isoroku Yamamoto during the attack on Pearl Harbor. She saw action only once, during the Battle of Leyte Gulf, due to the Japanese Navy's strategy of keeping major units in reserve for a decisive battle.
Nagato was laid down at the Kure Naval Arsenal on August 28, 1917, launched on November 9, 1919 and completed on November 15, 1920.
She underwent a major refit in 1936, removing her coal-burning boilers and upgrading her armour and anti-aircraft guns.