 Prominent capes include Lazareva, Peschanyi (sandy), Povorotny, Gromova, Pogibi, Tyk, and Korsakova in Russia; Crillon on Sakhalin; Sōya, Nosappu, Tappi, Nyuda, Rebun, Rishiri, Okushiri, Daso and Oki in Japan; and Musu Dan in North Korea.As world sea level dropped during the advance of the last Ice Age, the exit straits of the Sea of Japan one by one dried and closed.The deepest, and thus the last to close, is the western channel of the Korea Strait.