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Tokyo is the economic center of Japan: most of Japan's printing, broadcasting, telecommunications, banking, insurance, and financial services companies are based there, and many prominent international corporations are either headquartered in Tokyo or have their main Japanese offices there. While it is impossible to list them all, this article contains the names of some of the more prominent. Many large Japanese companies are also headquartered in the adjoining cities of Chiba, Kawasaki and Yokohama.