Korean yen
The Korean yen was the currency of Korea between 1910 and 1945. It was equivalent to the Japanese yen and consisted of Japanese currency and banknotes issued specifically for Korea. The yen was subdivided into 100 sen. It replaced the Korean won at par and was replaced by the South Korean won and the North Korean won at par.
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.