Edwin O. Reischauer, Japanese-American scholar and diplomat, United States Ambassador to Japan (died 1990)

Edwin Oldfather Reischauer was an American diplomat, educator, and professor at Harvard University. Born in Tokyo to American educational missionaries, he became a leading scholar of the history and culture of Japan and East Asia. Together with George M. McCune, a scholar of Korea, in 1939 he developed the McCune–Reischauer romanization of the Korean language.

The ambassador of the United States of America to Japan is the ambassador from the United States of America to Japan.