RISUI MARU was laid down as a steamer and named LIPIS for Straits Steamship Co. Ltd., Singapore. She was converted in 38 to a motor vessel. Requisitioned in Dec 41 by the Admiralty as an auxiliary patrol boat, she was bombed and abandoned on fire in Feb 42. Her wreck was seized by the Japanese in Jul 42 and after repairs, she was renamed RISUI MARU in 43. Registered in the IJN in Oct 43 as an auxiliary transport, she was shelled and sunk SE of the Andamans by British destroyers in Mar 45.