Ikuhiko Hata (? ??, Hata Ikuhiko, born 12 December 1932) is a Japanese historian.
He acquired his PhD at the University of Tokyo and has taught history at several universities.
He is the author of a number of influential and well-received scholarly works, particularly on topics related to Japan's role in the Second Sino-Japanese War and World War II.
Hata is variously regarded as being a "conservative" historian or a "centrist".
He has written extensively on such controversial subjects as the Nanking Massacre and the comfort women.
Fellow historian Edward Drea has called him "the doyen of Japanese military historians".