Treaty of Kanagawa

Dejima, or Deshima, was a small fan-shaped artificial island in the bay of Nagasaki, Japan. During the Edo period (1615-1868), Dejima was the only place in which foreign traders were allowed to conduct business with Japan. It was originally built for Portuguese traders but was later used by the Dutch East India Company. In 1858, when Japan concluded the Treaty of Kanagawa with the United States, Dejima’s role as the only port of entry for the West was over. The island was expanded by reclaiming land, and it was merged into Nagasaki, thus obscuring the island’s original borders.