Natsumi Kawaguchi
From Wikipedia, the free encyclopedia
Country(sports)Japan
Born28 June 2002
Height1.63 m (5 ft 4 in)
PlaysLeft (two-handed backhand)
| Country (sports) | Japan |
|---|---|
| Born | 28 June 2002 |
| Height | 1.63 m (5 ft 4 in) |
| Plays | Left (two-handed backhand) |
| Prize money | $67,809 |
| Singles | |
| Career record | 127–82 |
| Career titles | 4 ITF |
| Highest ranking | No. 346 (9 October 2023) |
| Current ranking | No. 578 (27 October 2025) |
| Doubles | |
| Career record | 88–62 |
| Career titles | 4 ITF |
| Highest ranking | No. 232 (4 December 2023) |
| Current ranking | No. 326 (27 October 2025) |
| Last updated on: 27 October 2025. | |
Natsumi Kawaguchi (川口夏実, Kawaguchi Natsumi; born 28 June 2002) is a Japanese tennis player.[3]
On 9 October 2023, she has achieved career-high rankings of 346 in singles and on 4 December 2023 of 232 in doubles.
Kawaguchi and her partner Adrienn Nagy won the 2019 Australian girls' doubles title, beating Emma Navarro and Chloe Beck in the final.[4][5]
She qualified for the main draw of the WTA 500 2023 Pan Pacific Open at home in Tokyo but had to withdraw shortly after.[citation needed]
Singles: 6 (4 titles, 2 runner-ups)
| Legend |
|---|
| W60 tournaments |
| W35 tournaments |
| W15 tournaments |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
|---|---|---|---|---|---|---|---|
| Win | 1–0 | Apr 2019 | ITF Cancún, Mexico | W15 | Hard |  Emily Appleton |
7–6(2), 6–7(2), 6–3 |
| Loss | 1–1 | Oct 2021 | ITF Monastir, Tunisia | W15 | Hard |  Tamira Paszek |
2–6, 3–6 |
| Win | 2–1 | Mar 2023 | ITF Hinode, Japan | W15 | Hard |  Aoi Ito |
6–4, 6–3 |
| Win | 3–1 | Apr 2023 | ITF Osaka, Japan | W15 | Hard | Miho Kuramochi |
6–4, 6–1 |
| Win | 4–1 | May 2023 | Fukuoka International, Japan | W60 | Carpet | Katie Boulter |
w/o |
| Loss | 4–2 | Oct 2025 | ITF Brisbane, Australia | W35 | Hard |  Taylah Preston |
2–6, 4–6 |
Doubles: 15 (7 titles, 8 runner-ups)
| Legend |
|---|
| W75 tournaments |
| W40/50 tournaments |
| W25/35 tournaments |
| W15 tournaments |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|---|---|
| Win | 1–0 | Apr 2019 | ITF Cancún, Mexico | W15 | Hard |  Maya Tahan |
Emily Appleton  María Portillo Ramírez |
6–1, 6–2 |
| Loss | 1–1 | Dec 2019 | ITF Cancún, Mexico | W15 | Hard |  Nika Kukharchuk |
 Madison Appel Elle Christensen |
w/o |
| Loss | 1–2 | Jun 2023 | ITF Tokyo, Japan | W25 | Hard | Talia Gibson |
 Luksika Kumkhum Kanako Morisaki |
6–1, 2–6, [3–10] |
| Loss | 1–3 | Jul 2023 | ITF Hong Kong | W40 | Hard | Kanako Morisaki |
 Eudice Chong Cody Wong |
5–7, 4–6 |
| Win | 2–3 | Oct 2023 | ITF Hamamatsu, Japan | W25 | Carpet | Hiromi Abe |
Haruna Arakawa Aoi Ito |
3–6, 6–4, [10–4] |
| Loss | 2–4 | Nov 2023 | ITF Yokohama, Japan | W40 | Hard | Aoi Ito |
 Liang En-shuo  Tang Qianhui |
w/o |
| Win | 3–4 | Aug 2024 | ITF Nakhon Si Thammarat, Thailand | W15 | Hard | Momoko Kobori |
Honoka Kobayashi Yukina Saigo |
6–3, 6–4 |
| Loss | 3–5 | Aug 2024 | ITF Nakhon Si Thammarat, Thailand | W35 | Hard | Momoko Kobori |
Kanako Morisaki Hikaru Sato |
2–6, 3–6 |
| Loss | 3–6 | Jul 2025 | ITF Nakhon Pathom, Thailand | W15 | Hard | Haruna Arakawa |
 Kim Na-ri Ye Qiuyu |
3–6, 2–6 |
| Win | 4–6 | Aug 2025 | ITF Singapore | W15 | Hard | Haruna Arakawa |
Natsuho Arakawa Anri Nagata |
6–2, 6–2 |
| Loss | 4–7 | Sep 2025 | ITF Nakhon Pathom, Thailand | W35 | Hard | Erika Sema |
Mana Ayukawa Eri Shimizu |
2–6, 7–6(5), [8–10] |
| Win | 5–7 | Sep 2025 | ITF Yeongwol, South Korea | W15 | Hard | Kim Da-bin |
Ha Sun-min Shek Cheuk-ying |
6–4, 6–2 |
| Win | 6–7 | Oct 2025 | Brisbane QTC Tennis International, Australia | W35 | Hard |  Monique Barry |
Tenika McGiffin Naho Sato |
7–5, 6–3 |
| Loss | 6–8 | Nov 2025 | Keio Challenger, Japan | W50 | Clay | Hayu Kinoshita |
Dang Yiming You Xiaodi |
2–6, 6–3, [4–10] |
| Win | 7–8 | Feb 2026 | Queensland International, Australia | W75 | Hard | Sara Saito |
Gabriella Da Silva-Fick Tenika McGiffin |
6–2, 6–4 |
