First Japanese Embassy to the United States received officially at the White House
The first Japanese diplomatic mission to the United States arrived in Washington, D.C. on May 14, 1860 after its long journey, via San Francisco and Panama. The seventy-four person party was hosted at the Willard Hotel. Three days later President Buchanan received the mission at the White House. The embassy then visited Philadelphia and New York and departed for home aboard the U.S.S. Niagara on June 30, 1860. (By John Osborne)
Chitoshi Yanaga, "The First Japanese Embassy to the United States," in Ellis S. Krauss and Benjamin Nyblade (eds.), Japan and North America: First Contacts to the Pacific War (New York: Routledge, 2004), 45.