Korean currency
The yen was the currency of Korea during the Colonial rule, from 1910 to 1945, and was issued by the Bank of Joseon It was equivalent to the Japanese yen and consisted of Japanese currency and banknotes issued specifically for Korea. It was replaced by the South Korean won at par in 1945, and by the North Korean won in 1947.
Korean currency
At the time of the introduction in 1945 the won was pegged to the Japanese yen at a rate of 1 won = 1 yen. In October of the same year the anchor currency got change to the US dollar at a rate of 15 won = 1 dollar. Toward the end of the Korean War the won was devaluated at 6000 won = 1 dollar. Following that the hwan was introduced as the new currency at a rate of 1 hwan = 100 won.