 The Fusō @-@ class battleships ( <unk> , Fusō @-@ gata senkan ) were a pair of dreadnought battleships built for the Imperial Japanese Navy ( IJN ) during World War I. 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 . 
