Korean currency
The yen was the currency of Korea during the Colonial rule, from 1910 to 1945, and was issued by the Bank of Joseon It was equivalent to the Japanese yen and consisted of Japanese currency and banknotes issued specifically for Korea. It was replaced by the South Korean won at par in 1945, and by the North Korean won in 1947.
Room 39
Room 39 (officially Central Committee Bureau 39 of the Workers' Party of Korea, also referred to as Bureau 39, Division 39, or Office 39) is a secretive North Korean party organization that seeks ways to maintain the foreign currency slush fund for the country's leaders, initially Kim Il-sung, then, in progression, Kim Jong-il and Kim Jong-un.