"Ryūjō" arrived in Singapore on 5 March and the ship supported operations in Sumatra and escorted convoys to Burma and the Andaman Islands for the rest of the month. On 1 April, while the 1st Air Fleet was starting its raid in the Indian Ocean, Malay Force, consisting of "Ryūjō", six cruisers, and four destroyers, left Burma on a mission to destroy merchant shipping in the Bay of Bengal. B5Ns damaged one freighter on 5 April before the force split into three groups. "Ryūjō"s aircraft bombed the small ports of Cocanada and Vizagapatam on the southeastern coast of India the next day, doing little damage, in addition to claiming two ships sunk and six more damaged during the day. The carrier and her escorts, the light cruiser and the destroyer "Yugiri" claimed to have sunk three more ships by gunfire. All together, Malay Force sank 19 ships totaling almost , before reuniting on 7 April and arriving at Singapore on 11 April. A week later, her B5Ns were detached for torpedo training and the ship arrived at Kure on 23 April for a brief refit.