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.
North Korean won
The first banknotes of "North Korea" were issued in 1945 by the Russian backed provisional government above the 38th parallel. These were in denominations of 1, 5, 10, and 100 won. These were discontinued shortly after Soviet forces withdrew and recognized the newly independent state.