Hisashi Owada (小和田 恆, Owada Hisashi, born 18 September 1932) is a Japanese former jurist, diplomat and law professor. He served as a judge on the International Court of Justice from 2003 until June 7, 2018, and was President of the Court from 2009 to 2012. He is the father of Empress Masako and the father-in-law of the incumbent Emperor of Japan, Naruhito.