Orrin Erastus Freeman (1830–1866) was an American professional photographer in China and Japan.
Freeman worked in the ambrotype process.
For a short time, Freeman opened a photography studio in Shanghai in 1859 before leaving China for Japan.Freeman established a studio in Yokohama in 1860.
He is considered to have been the first Western professional photographer to establish a permanent residence in Japan.He taught the elements of photography to Ukai Gyokusen who established the first photographer studio in Edo (Eishin-do) in 1861.
Gyokusen's camera, equipment and supplies were purchased from Freeman.
His death in 1866 was sudden.
He is buried in Yokohama Foreigner's Cemetery (Gaijin Bochi).