Makoto Ninomiya (二宮 真琴, Ninomiya Makoto, born 28 May 1994) is a Japanese professional tennis player. During her career, she has won one singles title on the ITF Circuit, and achieved a career-high singles ranking of 280. In doubles, she has won six titles on the WTA Tour, one title on the WTA Challenger circuit as well as 21 ITF titles, and peaked at No. 20 in the WTA rankings on 22 October 2018. Ninomiya began playing tennis on ITF events in 2009. Playing for Japan Fed Cup team, she has a win–loss record of 5–1.