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
The Central Bank of North Korea, under the Ministry of Finance, has a network of 227 local branches. Several reissues of banknotes in recent years suggest that citizens are inclined to hoard rather than bank any savings that they make from their incomes; reportedly they now also prefer foreign currency. At least two foreign aid agencies have recently set up microcredit schemes, lending to farmers and small businesses.