The Box-leaved syzygium (Syzygium buxifolium) belongs to Myrtaceae (the Myrtle family). It is a semi-tall evergreen tree that is distributed from southern Kyushu to the Nansei Islands and the Ogasawara Islands in Japan, as well as Taiwan, southern China, and Indochina. The bark is reddish brown and the tree grows 10 to 15 m tall. The leaves are small, elliptic or broadly obovate, and grow in pairs. The fruits ripen to blackish purple in early winter and can be eaten. The Japanese name is derived from the Taiwanese word for "小葉赤楠".