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.
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.