Nagato (長門) was the flagship of Admiral Isoroku Yamamoto during the attack on Pearl Harbor.
then participating in the Battle of Midway in June 1942
Nagato spent most of the first two years of the Pacific War training in home waters.
She was transferred to Truk in mid-1943, and participated in the Battle of the Philippine Sea in mid-1944.
Nagato fired her main armament against enemy vessels in the Battle of Leyte Gulf in October 1944. She was lightly damaged during the battle and returned to Japan.
The IJN was running out of fuel by this time and decided not to fully repair Nagato and converted it to a floating anti-aircraft platform and as coastal defense. She was attacked in July 1945 but was only slightly damaged.
In mid-1946, the ship was a target for nuclear weapon tests during Operation Crossroads. She survived the first test with little damage, but was sunk by the second test.