The Kasashima-class salvage tugboats (笠島型救難船兼曳船,, Kasashima-gata Kyūnansen-ken-eisen) were a class of rescue ship / tugboat of the Imperial Japanese Navy (IJN), serving during World War II. The IJN official designation for this class was 600-ton salvage tugboat (六〇〇瓲救難船兼曳船,, 600-ton Kyūnansen-ken-eisen) for all vessels.