"Hiyō" was torpedoed in June 1943 and "Jun'yō" in November; both ships spent about three months under repair. They spent most of the time after their repairs training and ferrying aircraft before returning to combat. "Hiyō" was sunk by a gasoline vapor explosion caused by an American aerial torpedo hit during the Battle of the Philippine Sea in mid-1944 while "Jun'yō" was damaged by several bombs. Lacking aircraft, she was used as a transport in late 1944 and was torpedoed in December. The ship was under repair until March 1945 when the repairs were deemed uneconomical. "Jun'yō" was then effectively hulked for the rest of the war. After the surrender of Japan in September, the Americans deemed the ship not worth her repair costs; she was broken up in 1946–1947.