He returned to Koura and sent the two skins, the feces, and the skull to Yoshinori Imaizumi at the National Museum of Nature and Science where examined the remains. The analysis was performed on 14 March 1965. The results showed the cat to be either a new species or a new subspecies, but there weren't enough samples to confirm. They requested either a complete set of remains or a live specimen. Following the announcement, some members of the society believed the samples to show simple mutations while others believed them to be the remains of wild cats that had previously been brought to and left on the island by foreign ships.