Yokohama , city (1990 pop. 3,220,331), capital of Kanagawa prefecture, SE Honshu, Japan, on the western shore of Tokyo Bay. Japan's second largest city and one of its leading seaports, Yokohama belongs to the extensive urban-industrial belt around Tokyo called the Keihin Industrial Zone. Among its industries are steel mills, oil refineries, chemical plants, and factories that produce transportation equipment, electrical apparatus, automobiles, machinery, primary metals, ships, and textiles. The city also has advanced technology industries and venture businesses. Yokohama has excellent transportation links with most major Japanese cities. In 1854, U.S. Commodore Matthew C. Perry visited Yokohama, which was then a small fishing village. In 1859 it became a port for foreign trade and the site of a foreign settlement that enjoyed extraterritorial rights. Known especially for its exports of raw silk, Yokohama also handled canned fish and other local products. Foreign trade led to the rapid growth of Yokohama, which served during the last half of the 19th cent. as Tokyo's outer port. The capital has since expanded the facilities and operations of its own port, but Yokohama is still important in the export of machinery, iron, and steel and in the import of raw materials for the region.