Denis Ashton Warner OBE CMG (12 December 1917 – 12 July 2012) was an Australian journalist, war correspondent and historian. Warner was born in New Norfolk in Tasmania's Derwent Valley. He attended The Hutchins School, where he was school captain, before embarking on a career in journalism. He began working for the Mercury as a copy boy in the late 1930s before being shifted to Melbourne to work for the Herald. After his return from war service in the Middle East (1941–43), he came to the attention of Sir Keith Murdoch, who dispatched him to Asia with the directive to "tell us how it is". Following the war's end, he worked for Reuters and the Australian Associated Press as head of the Tokyo bureau, from whence he reported on Japan's post-war experience and interviewed General Douglas MacAr