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.
Ghana–North Korea relations
Ghana has mostly run a deficit in its trade with North Korea, meaning that Ghana is a source of foreign currencies to North Korea. In 2015, North Korea was Ghana's 77th biggest trade partner with $6.8 million in trade. Ghana imports mostly cement from North Korea. It exports mainly cocoa, gemstones, and pearls, but also precious metals.