The first encounter between the two countries to be recorded in official documents occurred in 1791 when the Lady Washington became the first American ship to visit Japan in an unsuccessful attempt to sell sea otter pelts.
The first Japanese Embassy to the United States set sail for San Francisco in 1860, marking diplomatic engagement between the two nations.
The early 20th century saw Japan and the United States become allies during World War I, and diplomatic interactions continued.
Japan–United States relations continued to evolve throughout the Cold War and into the 21st century, with periods of cooperation and occasional trade disputes.
The two nations maintain strong economic ties, and Japan is a crucial ally of the United States in Asia.