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.
Sin Saimdang
Sin Saimdang is the first woman to appear on a South Korean banknote. The Bank of Korea (BOK; Hangul: 한국은행), the 50,000 won note, first issued in June 2009.
The design of the 50,000 won was released on February 25, 2009. A portrait of Shin Saimdang and her drawings, Mook Grapes (Hangul: 묵포도도) and Chochungdosubyeong (Hangul: 초충도수병,South Korean National Treasure No. 595) were illustrated on the front. Paintings ('wolmaedo' and 'pungjugdo') of the Joseon dynasty were illustrated on the back side. Unlike other bills, the illustrations on the back of this bill were illustrated vertically.
On May 5, The Bank of Korea announced that they selected Shin Saimdang main character of 50000won because she is "a representative female artist in the middle of the Joseon period" and "a person who has accomplished a remarkable achievement in gifted education by fulfilling his wife's role". The reason for the selection is that it is expected to contribute to raising awareness of gender equality in Korean society and to raise the importance of education and family. (Other candidate characters of 50,000 won were Kim Koo, Gwanggaeto the Great, Ahn Changho, Jang Yeong-sil, and Ryu Gwansun.)