The Keyaki tree, also known as Zelkova serrata, is a species of the genus Zelkova native to Japan, Korea, eastern China and Taiwan. It is often grown as an ornamental tree, and used in bonsai. The wood of the Keyaki tree is highly prized by Japanese woodworkers for its beautiful grain, durability and resistance to rot. It is used to make furniture, chests, boxes, clogs and other items. The Keyaki tree is also a symbol of some Japanese cities and prefectures, and one of the oldest and largest specimens is the Great Zelkova Nomo in Osaka, Japan.