Juglans mandshurica, the Manchurian walnut, is a deciduous tree of the genus Juglans (section Cardiocaryon), native to the Eastern Asiatic Region (China, Russian Far East, North Korea and South Korea). It grows to about 25 m. The Manchurian walnut contains and exudes much lesser quantities of allelopathic compounds (such as juglone) than other popular Juglans species and usually doesn't cause significant allelopathic effects in cultivation. The Japanese Walnut Japanese: 鬼胡桃(oni-gurumi) is listed by some authorities as Juglans mandshurica var. sachalinensis (syn. "Juglans ailantifolia")