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.
Korean currency
The won was introduced in 1902, replacing the yang at a rate of 1 won = 5 yang. In 1909, the Bank of Korea was founded in Seoul as a central bank and began issuing currency of modern type. The won was equivalent to the Japanese yen and was replaced by the Korean yen in 1910. At the same time, Korean yen notes issued by Dai Ichi Ginko (First National Bank (of Japan), 株式會社第一銀行) also circulated.