Abstract: Tokyo Megalopolis is one of the biggest urban agglomerations in Japan, even in the world. It takes on the function as the political, economic and cultural center of Japan, at the same time, it takes on the function that controls the global economy. Among the core cities in Tokyo Megalopolis, relatively distinct functional division and cooperation system has formed, which makes the global region exert the advantage of agglomeration. Based on the analysis of functional division among the core cities in Tokyo Megalopolis, combined with actualities in China Capital Circle, this paper put forward the assumption of functional division among the core cities in the China Capital Circle, which will accelerate the formation of reasonable division and cooperation system in this area.