The former silver unit of Korea, rated at the fifth of the Mexican Peso.
In 1893 a new series was introduced, consisting of the five and one Yang in sil- ver, equal to one hundred Mon (q.v.) ; and a half and quarter Yang in nickel. The name of the Yang was formerly Niang.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)