Kobe Japan. The capital of Hyogo Prefecture and one of Japan’s ten largest cities. Located between the sea and the Roko mountain range. Kobe is considered to be one of Japan’s most attractive cities. It has been an important port city for many centuries. Its port was among the first to be opened to foreign trade in the 19th century alongside the ports of Yokohama, Nagasaki, Hakodate, and Niigata.