Keita Obara (小原佳太, Ohara Keita, born 12 November 1986) is a Japanese professional boxer who challenged for the IBF and IBO light-welterweight titles in 2016. At regional level he held the WBC-OPBF light-welterweight title from 2014 to 2015 and the WBO Asia Pacific welterweight title twice between 2017 and 2018.