Yasutaro (Keiho) Soga (相賀安太郎 渓芳, March 18, 1873 Tokyo - March 7, 1957) was a Hawaiian Issei journalist, poet and activist. He was a community leader among Hawaii's Japanese residents, serving as chief editor of the Nippu Jiji, then the largest Japanese-language newspaper in Hawaii and the mainland United States, and organizing efforts to foster positive Japan-U.S. relations and address discriminatory legislation, labor rights and other issues facing Japanese Americans. An accomplished news writer and tanka poet before the war, during his time in camp Soga authored one of the earliest memoirs of the wartime detention of Japanese Americans, Tessaku Seikatsu or Life Behind Barbed Wire.