Etymology of the Korean currencies
The won is the currency of both North and South Korea. "Won" is a cognate of the Chinese currency unit, the yuan (//), and the Japanese currency unit, the yen (; ¥), meaning "round object". The won is subdivided into 100 jeon ().
Bank of Korea (1909–1950)
The Bank of Joseon (Korean: 조선은행) or Bank of Chosen (Japanese: 朝鮮銀行) was the central bank of Colonial Korea, and of South Korea. The bank issued the Korean yen from 1910 to 1945 and the won from 1945 to 1950.