知床半島
Regarding similar cases relating to beaked whales, an unknown type of large beaked whale of similar size to fully grown "Berardius bairdii" have been reported to live in the Sea of Okhotsk. These whales have heads somewhat resembling Longman's beaked whales, There have been claims that records of strandings of these whales exist along the areas within and adjacent to Tatar Strait in 2010s. In addition, possible new species of beaked whales have been described to be present in the coastal and pelagic waters of Abashiri and Shiretoko Peninsula northeastern Hokkaido.