This chapter analyses the transformation of sumo wrestlers’ birthplaces from the Edo period to the present day, which covers 300 years. During the Edo Era, sumo was regional entertainment, with most wrestlers originating from Edo (Tokyo). Following the Meiji Restoration, modernization and market economy development brought significant transformation to the sumo world. After 1900, the rate of new wrestler recruitment accelerated, with Tokyo-born wrestlers’ proportion increasing sharply during the Meiji-Taisho period. However, post-World War II witnessed nationwide diversification of wrestlers’ origins, with Hokkaido-born wrestlers showing particularly notable growth. Hokkaido, considered ‘overseas’ during the Edo period, represents the most geographically distant region from Tokyo. Data analysis reveals three distinct phases: Edo-Era regional sumo, Meiji-Era Tokyo concentration, and post-war national dispersion. This transformation reflects broader societal changes including Japan’s economic development, industrial restructuring, and rural-to-urban labour migration. The chapter demonstrates the beginning of ‘domestic globalisation’ within the sumo world, establishing foundations for later international globalisation.