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.
Economy of North Korea
In late 2009, North Korea revalued its currency, effectively confiscating all privately held money above the equivalent of US$35 per person. The revaluation effectively wiped out the savings of many North Koreans. Days after the revaluation the won dropped 96% against the United States dollar. Pak Nam-gi, the director of the Planning and Finance Department of North Korea's ruling Workers' Party, was blamed for the disaster and later executed in 2010.
In 2004 and 2006 laws were passed to codify rules for savings and commercial banking. However it was not until 2012 that North Korean banks started to seriously compete for retail customers. Competing electronic cash cards have become widely accepted in Pyongyang and other cities, but are generally not linked to bank accounts. North Korean banks have introduced retail products which permit a mobile phone app to make payments and top-ups.