"Cassin Young" continued operations in support of the Leyte conquest, as her carriers continued to range widely, striking at enemy bases on Okinawa, Formosa, and Luzon. With Ulithi as her base, the destroyer screened carriers during the January 1945 South China Sea raid as their aircraft pounded away at Formosa, Luzon, Camranh Bay, Hong Kong, Canton, and the Nansei Shoto in their support for the assault on Luzon. A brief overhaul at Ulithi prepared her for the operations supporting the invasion of Iwo Jima with air strikes on Honshū and Okinawa, the bombardment of Parece Vela, and screening off Iwo Jima itself during the initial assault on 19 February.