© 2014, Kanagawa Prefectural Museum of Natural History. All rights reserved. We examined stomach contents of a Lagenorhynchus obliquidens and a Kogia sima stranded on the coast of Sagami Bay in 2011, and described cephalopod beaks, fish otoliths and bones. Cephalopods (Ommastrephidae sp., Watasenia scintillans) and fishes (Engraulis japonica, Acropoma japonicum, Decapterus maruadsi, Carangidae sp. and Sphyraena sp.) were obtained from L. obliquidens. Many cephalopod beaks, mainly W. scintillans and Taonius pavo and fish otoliths (Diaphus gigas, Glossanodon semifasciatus and Physiculus sp.) were found from K. sima. It is considered that the shallower coastal area (0 - 150 m depth) is foraging space for L. obliquidens, and the mesopelagic zone on the continental shelf or slope (70 - 1000 m depth) is for K. sima.