National Museum of Nature and Science
A team of Japanese scientists, Tadayoshi Sasaki and Shigeru Kimura from the Tokyo University of Marine Science and Technology, Ikuo Obata from the National Museum of Nature and Science, and Toshio Ikuya from the Atmosphere and Ocean Research Institute at the University of Tokyo, jointly concluded, while the identity of the carcass could not be determined with certainty, the carcass was most likely that of a large shark.