Atsumi, Toshihiro-Silk, regional rivalry, and the impact of the port openings in nineteenth century Japan The centre of economic activities in Japan was once in western Japan. Since the mid-nineteenth century, however, economic activities within Japan have been continuously shifting towards the east side of the country including Tokyo. Conventional wisdom associates the end of the Tokugawa feudal regime with this eastward shift. By applying a new economic geography model to the silk economy of Japan in the nineteenth century, this paper explains why the majority of industrial activities located initially in western Japan, and offers an alternative economic explanation for the eastward shift as an impact of the port openings in 1859. J. Japanese Int. Economies 24 (4) (2010) 519-539. Faculty of Economics, Meiji Gakuin University, 1-2-37 Shirokanedai, Minato-ku, Tokyo 108-8636, Japan. (C) 2010 Elsevier Inc. All rights reserved.