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.
Etymology of the Korean currencies
The word jeon is also used in Korean to translate the word "cent," and in this context is associated with bul (불, 弗), meaning "dollar." (The hanja character resembles the symbol "$".) These two words are used by Koreans living in the Western hemisphere when referring to dollar currencies.