sentences:  However, rampant inflation has been eroding the North Korean wŏn's value to such an extent that currently it is believed to be worth about the same as the South Korean wŏn (needs sourcing).In any case, the U.S. dollar and other currencies are still worth more in North Korean wŏn on the black market than officially.Following the end of the division of Korea, the won was introduced to replace the Korean yen.