Dejima was a Portuguese and subsequently Dutch trading post at Nagasaki, Japan, from 1634 to 1854. Dejima was also the location for trade with the Chinese at the time, and thus the only place designated for foreign trade and exchange during the historical Japanese Edo period.
Dejima was a small fan-shaped artificial island in the bay of Nagasaki covering an area of 120 m × 75 m or 9,000 m2, and is listed in old Western documents Latinised as Deshima, Decima, Decuma, Desjima, Dezima, Disma, or Disima. Dejima was built in 1634 to house Portuguese traders and separate them from Japanese society by digging a canal through a small peninsula.
Wikipedia https://en.wikipedia.org/wiki/Dejima
Address Nagasaki, Japan
Coordinates 32°44'36.564" N 129°52'22.581" E