Old Korean accounts also describe that the sea lion and spotted seal ("Phoca largha") were found in broad area containing the BoHai Sea, the Yellow Sea, and Sea of Japan. The sea lions and seals left relevant place names all over the coast line of Japan, such as Ashika-iwa (アシカ岩, sea lion rock) and Inubosaki (犬吠崎, dog-barking point) because of the similarity of their howls. Bones of "Z. japonicus" dating to 3500–2000 BC were found in the Shell Mound in Dongsam-dong, Busan. Genetic evidence confirms the former presence of "Z. japonicus" on the Liancourt rocks.