Oncorhynchus masou, known as the masu salmon, masu, or the cherry salmon, is a species of salmon found in the Western Pacific Ocean along East Asia, ranging from the Kamchatka, Kuril Islands, Sakhalin, and Primorsky Krai south through Korea, Taiwan, and Japan. A number of subspecies are known, including the anadromous, widespread masu Oncorhynchus masou masou (e.g.