James 'Jimmie" Yutaka Matsumoto Omura (November 17, 1912 – June 20, 1994) was the English language editor of the Rocky Shimpo newspaper in Denver, Colorado, during World War II.
He was an outspoken critic of the expulsion of people of Japanese ancestry from the west coast of the United States to concentration camps, following the Japanese attack on Pearl Harbor.
Subsequently, he became a vocal champion of the Nisei draft resisters, providing a 'substantial anchor' to the work of the Heart Mountain Fair Play Committee by publishing their grievances in the Rocky Shimpo.
At a time when the Japanese American Citizens League (JACL) preached passive conformity with the federal government as the best policy, Omura became the JACL's arch-enemy for counseling active resistance.