Distylium racemosum

Distylium racemosum, the isu tree, is a species of flowering plant in the family Hamamelidaceae. It is native to subtropical eastern Asia; central and southern Japan, the Ryukyu Islands, South Korea (Jeju Island), southeastern China, Taiwan, Hainan, and northern Vietnam. There are a number of cultivars, including 'Guppy' and the variegated 'Akebono'.