National Institute of Korean Language specifies the "Hangang" or "Hangang River" as official names.
The Hangang River or Hangang is a major river in South Korea and the fourth longest river on the Korean peninsula after the Amnok, Tuman, and Nakdong rivers. The river begins as two smaller rivers in the eastern mountains of the Korean peninsula, which then converge near Seoul, the capital of the country.
The Hangang River and its surrounding area have played an important role in Korean history. The Three Kingdoms of Korea strove to take control of this land, where the river was used as a trade route to China. The river is no longer actively used for navigation, because its estuary is located at the borders of the two Koreas, barred for entrance by any civilian.
Wikipedia https://en.wikipedia.org/wiki/Han_River_(Korea)
Address South Korea
Coordinates 37°33'38.517" N 127°10'16.147" E