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ken (prefecture), Honshu, Japan, located south of Tokyo and bordered by Tokyo Bay to the east and the Pacific Ocean to the south. It occupies an area of 928 square miles (2,403 square km). The eastern coast is an important part of the Keihin Industrial Zone; Yokohama, Tokyo's port, is the prefectural capital. The Pacific coast is a popular resort area, including such cities as Kamakura, Hiratsuka, and Odawara.