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 won
The won was introduced in 1902, replacing the yang at a rate of 1 won = 5 yang. Units: 1 won = 100 chon/銭, 1 chon = 5 poon/分(fun ec. yesteryear spellings) of the preceding currency. In 1909, the Bank of Korea (한국은행; 韓國銀行) was founded in Seoul as a central bank and began issuing currency of a modern type. The won was equivalent to the Japanese yen and was replaced by the Korean yen in 1910 during the Colonial Era. In 1910, the Bank of Korea was renamed the Bank of Joseon (; 朝鮮銀行), which issued notes denominated in yen and "sen".