Fusō was the lead ship of the two Fusō-class dreadnought battleships built for the Imperial Japanese Navy. Launched in 1914 and commissioned in 1915, she initially patrolled off the coast of China, playing no part in World War I. In 1923, she assisted survivors of the Great Kantō earthquake.

The Fusō-class battleships were a pair of dreadnought battleships built for the Imperial Japanese Navy (IJN) before World War I and completed during it. Both patrolled briefly off the coast of China before being placed in reserve at the war's end. In 1922 Yamashiro became the first battleship in the IJN to successfully launch aircraft.