Korean currency
In 1902, won was introduced as the official currency unit replacing yang at 1 won = 5 yang. The bank of Korea was established 1909 but soon after in 1910, Imperial Japan annexed Korean Empire. Under Colonial rule, the country was made to use the currency unit "yen" in the name of Korean yen, which took over the Korean won at par. After the division of Korea, the state of South Korea was established and recognized in 1948, and won was again made the official currency of the new state. "jeon" was made the subunit of the currency that divided it into 100 equal parts. Bank of Joseon issued the currency for independent South Korea for the first time that too in banknotes only.
Central Bank of the Democratic People's Republic of Korea
On February 15, 1946, a central bank of North Korea was announced, which was to be under the control of the Soviet military. However, the bank failed to accomplish its objectives, being unable to meet its costs of operation, and the 100 million wŏn capitalisation was ineffective. The North Korean Interim People's Committee did not look upon the bank favorably, and chose instead to work through the Farmers' Bank, which also existed at the time. By late 1946, banking functions were consolidated into two main institutions, the Central Bank and Farmer's Bank. In June 1947, around 1,000 million wŏn was concentrated in the Central Bank, allowing it to extend credits totalling 900 million wŏn for economic rehabilitation. The consolidation reflected a return to the original objectives of the People's Committee, which wanted closer control over the economy; any banking people opposed to the changes within the system were removed from their posts. On December 6, 1947, a comprehensive program of currency reform was announced.