The Tanna-sawafutagi (Symplocos coreana) belongs to the family Symplocaceae. It is a small deciduous tree that is distributed from the Kanto region of Honshu west to Shikoku, Kyushu in Japan, and the Korean Peninsula. It grows on forest floors in mountains and along valleys, and is about 1 to 2 m high. The leaves are obovate and slightly hard and alternate. Usually, it has coarser saw teeth than ""Sawa-futagi" (Symplocos chinensis var. leucocarpa f. pilosa). Around June, panicles are borne on the tips of the branches and small white flowers come in bloom. The fruits ripen black-purple in the fall. The Japanese name "Tanna" (Tamna) is a kingdom that existed on Jeju Island from ancient times to the Middle Ages.