Natsumi Kawaguchi

JapanAge and results

Natsumi Kawaguchi is a tennis player on the WTA Tour who reached a career-high ranking of No. 346 on October 9, 2023.

Updated Nov 9, 2026, 7:12 AM ET

2026 record0-0 Career highNo. 346Oct 9, 2023

About Natsumi Kawaguchi

Born on June 28, 2002, in Nagasaki Prefecture, Japan, Natsumi Kawaguchi plays on the WTA Tour. She plays left-handed with a two-handed backhand and played her first season as a professional in 2018. On October 9, 2023, Kawaguchi reached a career-high WTA Tour ranking of No. 346.

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Agatha Research DeskUpdated Oct 16, 2026

Match history

Every WTA Tour, Grand Slam and Olympic main-draw match in our records, newest first. A walkover is listed but never counted in a record.

2026: 0-1

Date	Tournament	Round	Opponent	Result	Score	Surface
Sep 26	Jingshan Tennis Open	Qualifying 1st Round	Guo Meiqi	L	0-6, 3-6	Hard

2023: 2-1

Date	Tournament	Round	Opponent	Result	Score	Surface
Sep 23	Toray Pan Pacific Open Tennis	Qualifying Final	Himeno Sakatsume	W	7-6(2), 6-4	Hard
Sep 23	Toray Pan Pacific Open Tennis	Qualifying 1st Round	Bibiane Schoofs	W	6-4, 6-3	Hard
Sep 9	Japan Open	Qualifying 1st Round	Himeno Sakatsume	L	3-6, 3-6	Hard

How she is doing nowThrough Sep 26

2026 record0-0

Last 42-2LWWLNewest first. Lost her last match.

Sep 26vs Guo MeiqiSep 26 - Jingshan Tennis Open, Qualifying 1st RoundL0-6, 3-6
Sep 23vs Himeno SakatsumeSep 23 - Toray Pan Pacific Open Tennis, Qualifying FinalW7-6(2), 6-4
Sep 23vs Bibiane SchoofsSep 23 - Toray Pan Pacific Open Tennis, Qualifying 1st RoundW6-4, 6-3
Sep 9vs Himeno SakatsumeSep 9 - Japan Open, Qualifying 1st RoundL3-6, 3-6

ITF finals

ITF: 6 singles finals, 4 won; 16 doubles finals, 7 won. From 2019 to 2026.

Singles

L
Oct 2025Runner-up at Brisbane QTC International, Australia (W35, hard), losing to Taylah Preston 2-6, 4-6.
W
May 2023Won the title at Fukuoka International, Japan (W60, carpet): Katie Boulter gave a walkover.
W
Apr 2023Won the title at ITF Osaka, Japan (W15, hard), beating Miho Kuramochi 6-4, 6-1.
W
Mar 2023Won the title at ITF Hinode, Japan (W15, hard), beating Aoi Ito 6-4, 6-3.
L
Oct 2021Runner-up at ITF Monastir, Tunisia (W15, hard), losing to Tamira Paszek 2-6, 3-6.
W
Apr 2019Won the title at ITF Cancun, Mexico (W15, hard), beating Emily Appleton 7-6(2), 6-7(2), 6-3.

Doubles

L
Jun 2026Runner-up at ITF Taipei, Taiwan (W35, hard) with Ayano Shimizu, losing to Back Da-yeon and Tsao Chia-yi 5-7, 1-6.
W
Feb 2026Won the title at Queensland International, Australia (W75, hard) with Sara Saito, beating Gabriella Da Silva-Fick and Tenika McGiffin 6-2, 6-4.
L
Nov 2025Runner-up at Yokohama Challenger, Japan (W50, hard) with Hayu Kinoshita, losing to Dang Yiming and You Xiaodi 6-2, 3-6, [4-10].
W
Oct 2025Won the title at Brisbane QTC International, Australia (W35, hard) with Monique Barry, beating Tenika McGiffin and Naho Sato 7-5, 6-3.
L
Sep 2025Runner-up at ITF Nakhon Pathom, Thailand (W35, hard) with Erika Sema, losing to Mana Ayukawa and Eri Shimizu 2-6, 7-6(5), [8-10].
W
Sep 2025Won the title at ITF Yeongwol, South Korea (W15, hard) with Kim Da-bin, beating Ha Sun-min and Shek Cheuk-ying 6-4, 6-2.
W
Aug 2025Won the title at ITF Singapore (W15, hard) with Haruna Arakawa, beating Natsuho Arakawa and Anri Nagata 6-2, 6-2.
L
Jul 2025Runner-up at ITF Nakhon Pathom, Thailand (W15, hard) with Haruna Arakawa, losing to Kim Na-ri and Ye Qiuyu 3-6, 2-6.

Show 8 more

W
Aug 2024Won the title at ITF Nakhon Si Thammarat, Thailand (W15, hard) with Momoko Kobori, beating Honoka Kobayashi and Yukina Saigo 6-3, 6-4.
L
Aug 2024Runner-up at ITF Nakhon Si Thammarat, Thailand (W35, hard) with Momoko Kobori, losing to Kanako Morisaki and Hikaru Sato 2-6, 3-6.
L
Dec 2023Runner-up at ITF Yokohama, Japan (W40, hard) with Aoi Ito: a walkover to Liang En-shuo and Tang Qianhui.
W
Oct 2023Won the title at ITF Hamamatsu, Japan (W25, carpet) with Hiromi Abe, beating Haruna Arakawa and Aoi Ito 3-6, 6-4, [10-4].
L
Jul 2023Runner-up at ITF Hong Kong, China (W40, hard) with Kanako Morisaki, losing to Eudice Chong and Cody Wong 5-7, 4-6.
L
Jun 2023Runner-up at ITF Tokyo, Japan (W25, hard) with Talia Gibson, losing to Luksika Kumkhum and Kanako Morisaki 6-1, 2-6, [3-10].
L
Dec 2019Runner-up at ITF Cancun, Mexico (W15, hard) with Nika Kukharchuk: a walkover to Madison Appel and Elle Christensen.
W
Apr 2019Won the title at ITF Cancun, Mexico (W15, hard) with Maya Tahan, beating Emily Appleton and Maria Portillo Ramirez 6-1, 6-2.

Most often against

The players she has met most in our records, with the head-to-head.

Himeno Sakatsume2 meetings

1-1All square

Last: Sep 23, 2023, Toray Pan Pacific Open Tennis Qualifying Final, won

Sources and updates

Results and schedules come from Agatha's own records of the WTA Tour.

Updated Nov 9, 2026, 7:12 AM ET. Results and form refresh after every match; biography facts are checked weekly.