Makoto Ninomiya

is a Japanese professional tennis player. She achieved a career-high doubles ranking of world No. 20 on 22 October 2018, and peaked at No. 280 in singles on 22 February 2016. Partnered with Eri Hozumi, she reached the final of the 2018 French Open.

In doubles, she has won nine titles on the WTA Tour, two titles on the WTA Challenger Tour as well as 21 ITF Circuit titles. In singles, there is only one ITF title.

Playing for Japan Fed Cup team, she has a win–loss record of 5–1 (as of June 2024).

Career Ninomiya began playing tennis on ITF events in 2009.

She reached her biggest final at the 2018 French Open with partner Eri Hozumi, losing to sixth seeds Barbora Krejčíková and Kateřina Siniaková. The pair also reached the final of the 2023 Jiangxi Open where they lost to second seeds Laura Siegemund and Vera Zvonareva.

Alongside Nao Hibino, she was runner-up in the doubles at the 2024 Hong Kong 125 Open, losing to Monica Niculescu and Elena-Gabriela Ruse in the final.

Partnering Ulrikke Eikeri, she won the doubles title at the 2024 Hong Kong Open, defeating Shuko Aoyama and Eri Hozumi in the final which went to a deciding champions tiebreak.

Alongside Maia Lumsden, Ninomiya won the doubles title at the 2025 WTA 125 Saint-Malo Open, defeating Oksana Kalashnikova and Angelica Moratelli in the final.

Doubles performance timeline

Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records and career statistics.

Grand Slam tournament finals Doubles: 1 (runner-up) ResultYearTournamentSurfacePartnerOpponentsScoreLoss 2018 French Open Clay Eri Hozumi Barbora Krejčíková Kateřina Siniaková 3–6, 3–6

WTA Tour finals Doubles: 19 (9 titles, 10 runner-ups) LegendGrand Slam (0–1)WTA 500 (1–0)WTA 250 (8–9)Finals by surfaceHard (5–7)Grass (2–0)Clay (2–3)

WTA 125 finals Doubles: 6 (2 titles, 4 runner-ups)

ITF Circuit finals Singles: 3 (1 title, 2 runner-ups) Legend$25,000 tournaments (0–1)$10,000 tournaments (1–1)Finals by surfaceHard (0–1)Grass (1–1)

Doubles: 33 (21 titles, 12 runner-ups) Legend$100,000 tournaments (2–0)$75,000 tournaments (2–1)$50/60,000 tournaments (6–2)$25,000 tournaments (6–5)$10,000 tournaments (5–4)Finals by surfaceHard (15–7)Clay (0–1)Grass (4–2)Carpet (2–2)