The document summarizes the history and development of agricultural extension systems in the United States and Japan. It describes how the land-grant college system was established in 1862 in the US to teach agriculture. In 1914, the Smith-Lever Act created the nationwide Cooperative Extension Service partnership between government, land-grant colleges, and local communities. The extension system aims to disseminate information to help farmers. Japan also began extension work in the late 1800s through agricultural societies and demonstration farms. After World War 2, Japan revitalized its agriculture sector by training farmers through extension programs run by the central and prefectural governments. The document compares indicators of research-extension linkages between the two countries.