US National Archives
Nara: The Treaty of Kanagawa
Information about,and a scanned copy of, the Treaty of Kanagawa between the United States and Japan.
Yale University
The Opening of Japan to the West
Site offers wonderful illustrations of Perry's expedition to Japan with brief descriptions.
Siteseen
Siteseen: American Historama: Treaty of Kanagawa
Comprehensive resource includes detailed facts and information about the Treaty of Kanagawa that was signed by Commodore Perry and the Shogunate of the Japanese government on March 31, 1854.