Battle of Leyte Gulf
The IJN Nagato, IJN Musashi, and IJN Yamato sailed with Force A of the Northern Force commanded by Vice-Admiral Kurita on October 22, 1944. United States aircraft attacked and damaged Nagato's boiler room, disabled no. 4 turret, guns of the secondary battery, and her speed reduced 21 knots.
Eventually the force came upon TF77.4 of six escort carriers. Two escort carriers, two destroyers, and one destroyer escort were sunk. It is not clear if the Nagato made any hits.
After the battle the Japanese ships returned to Yokosuka Navy Yard for repairs.
Survived World War II
As one of the few Japanese ships to survive the war, the IJN Nagato was used in the a-bomb test at Bikini Atoll in July 1946.