Sadatsuchi Uchida (内田 定槌 Uchida Sadatsuchi?, born in 1865 in modern-day Kokura, Fukuoka Prefecture – June 2, 1942) was a Japanese diplomat. Assigned to postings in the United States and Brazil, Uchida was instrumental in facilitating improved Japanese trade relations and emigration to both countries.
A law graduate of the Tokyo Imperial University, Uchida joined the Japanese Ministry of Foreign Affairs in 1889. He was appointed as an Eleve-Consul to Shanghai in 1890, Consul to Seoul in 1893 and in 1902 was reassigned to serve as Consul General in New York City.
In 1902, Uchida toured the Gulf Coast region of the United States. At the time, overpopulation and the limited usable land for farming was affecting Japan. In the United States, rice farming was still in its infancy, and local rice production was falling short of its full potential. Consul General Uchida met with officials from the Texas Governor’s office, business owners in Houston, and other community leaders who gave him confidence that the Japanese would be welcomed into the region. Uchida was impressed with the land of the Gulf Coast of Southeast Texas for its rice farming potential.
Uchida's reports back to Japan of the agricultural conditions in Southeast Texas led to the migration of a number of Japanese businessmen and the development of rice cultivation in that region. Some of the better known of these migrants included Seito Saibara, who established a Japanese community near Webster, and Kichimatsu Kishi who would establish a colony in Orange County, Texas.