The basis of the gold system of Korea and corresponding to the Yen of Japan, and the Yuan of China. The divisions are 1 Warn equal to 10 Niang or Yang. 1 Niang equal to 100 Mun,
Gold twenty, ten, and five Warns, and silver Warns and half Warns were issued shortly before the Japanese annexation of the country. See Won.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)