Colonial Korea in the 1920s witnessed “the development” of industry, and agriculture in particular. Public infrastructure was also expanded with major ports extended and reconstructed in this period. This resulted in “economic growth”, from increased agricultural production and volume of trade. However, this did not mean that the growth benefitted Koreans in the colony. Farmers had to pay the upfront costs needed to increase rice production under the Program to Increase Rice Production, while the rice was sent to Japan through landlords and rice mills. Koreans had to export the rice they cultivated to Japan and consume millet from Manchuria instead. The Government-General extended Korean port facilities for the efficient management of such “trade”, and hosted various expositions to promote Korean indigenous products in Japan. In the 1920s, Japanese demand led Korea’s industrial structure to change to a system based on agriculture, especially single-crop farming, while trade increased within the Japanese economic sphere. In other words, growth was connected to the intensification of economic subordination to Japan.