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.
Delta Asia Financial Group
Although virtually every bank in Macao handled North Korean funds, U.S. regulators singled out Banco Delta Asia because the shutdown of a smaller bank would create less financial disruption. North Korea was able to gain access to funds deposited at the bank by raising the issue with the United States at the Six-party talks on nuclear weapons technology in Beijing. However, the bank remains under U.S. sanction and is therefore unable to conduct business in either U.S. dollars or in Hong Kong dollars. The sanctions are said to have intimidated other banks from doing business with North Korea and disrupted the country's system for transferring foreign exchange. Macau has responded by stepping up enforcement of anti money laundering laws.