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.
Slavery in the 21st century
In North Korea, the government forces many people to work for the state, both inside and outside North Korea itself, sometimes for many years. The 2018 Global Slavery Index estimated that 2.8 million people were slaves in the country. The value of all the labour done by North Koreans for the government is estimated at $975 million USD, with "dulgyeokdae" (youth workers) forced to do dangerous construction work, and "inminban" (women and girl workers) forced to making clothing in sweatshops. The workers are often unpaid. Additionally, North Korea's army of 1.2 million soldiers is often made to work on construction projects unrelated to defense.