is a Japanese tennis player. She has career-high WTA rankings of world No. 226 in singles, achieved on 22 April 2019, and No. 89 in doubles, achieved on 30 March 2026. She has won four singles titles and 27 doubles titles on the ITF Circuit.
Career Kobori made her WTA Tour main-draw debut at the 2017 Japan Women's Open, after receiving a wildcard alongside Erina Hayashi into the doubles tournament.
Teaming up with Peangtarn Plipuech, she reached the finals at the 2025 Hong Kong Tennis Open, losing to Jiang Xinyu and Wang Yafan, and the 2026 Guadalajara Open, losing to Cristina Bucșa and Nicole Melichar-Martinez.
WTA Tour finals Doubles: 2 (2 runner-ups) LegendWTA 1000 WTA 500 (0–1)WTA 250 (0–1)Finals by surfaceHard (0–2)Clay (0–0) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss 0–1 Hong Kong Open, China SAR WTA 250 Hard Peangtarn Plipuech Jiang Xinyu Wang Yafan 4–6, 2–6Loss 0–2 Guadalajara Open, Mexico WTA 500 Hard Peangtarn Plipuech Cristina Bucșa Nicole Melichar-Martinez 2–6, 7–5, [5–10]
WTA 125 finals Doubles: 3 (3 runner-ups) ResultW–LDateTournamentSurfacePartnerOpponentsScoreLoss 0–1 Palermo Ladies Open, Italy Clay Ayano Shimizu Estelle Cascino Feng Shuo 2–6, 7–6(7), [7–10]Loss 0–2 Huzhou Open, China Clay Ayano Shimizu Veronika Erjavec Zhibek Kulambayeva 4–6, 2–6Loss 0–2 Antalya Challenger, Turkey Clay Peangtarn Plipuech Iryna Shymanovich Maria Kozyreva 5–7, 1–6
ITF Circuit finals Singles: 9 (4 titles, 5 runner-ups) LegendW25/35 tournamentsW15 tournamentsFinals by surfaceHard (1–2)Carpet (3–3) ResultW–LDateTournamentTierSurfaceOpponentScoreLoss 0–1 Oct 2017ITF Makinohara, Japan25,000 Carpet Ayano Shimizu 3–6, 3–6Win 1–1 May 2018ITF Karuizawa, Japan25,000 Carpet Miyabi Inoue 6–0, 6–2Win 2–1 Oct 2018ITF Makinohara, Japan25,000 Carpet Junri Namigata 6–2, 6–3Loss 2–2 May 2019ITF Karuizawa, JapanW25 Carpet Jovana Jakšić 1–6, 6–4, 5–7Loss 2–3 Mar 2021ITF Sharm El Sheikh, EgyptW15 Hard Yuriko Miyazaki 2–6, 6–4, 3–6Loss 2–4 Oct 2022ITF Nanao, JapanW25 Carpet Haruka Kaji 6–3, 3–6, 3–6Win 3–4 Sep 2024ITF Kyoto, JapanW35 Hard (i) Tiphanie Lemaître 7–6(1), 6–2Loss 3–5 Jun 2025ITF Taipei, TaiwanW35 Hard Janice Tjen 6–4, 1–6, 2–6Win 4–5 Nov 2025ITF Hamamatsu, JapanW35 Carpet Eri Shimizu 6–2, 6–4
Doubles: 53 (29 titles, 24 runner-ups) LegendW100 tournamentsW60/75 tournamentsW40/50 tournamentsW25/35 tournamentsW10/15 tournamentsFinals by surfaceHard (20–17)Clay (4–0)Grass (1–0)Carpet (4–7) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss 0–1 Mar 2016ITF Nishitama, Japan10,000 Hard Chihiro Muramatsu Robu Kajitani Mihoki Miyahara 6–4, 2–6, [6–10]Win 1–1 Mar 2017ITF Nishitama, Japan15,000 Hard Kotomi Takahata Shiho Akita Erika Sema 6–1, 6–2Loss 1–2 Jun 2017ITF Tokyo, Japan25,000 Hard Kotomi Takahata Rika Fujiwara Kyōka Okamura 2–6, 0–6Win 2–2 Jun 2017Open de Montpellier, France25,000 Clay Ayano Shimizu Laura Pigossi Victoria Rodríguez 6–3, 4–6, [10–7]Win 3–2 Jul 2017ITF Denain, France25,000 Clay Ayano Shimizu Mathilde Armitano Elixane Lechemia 6–4, 6–3Win 4–2 Oct 2017ITF Toowoomba, Australia25,000 Hard Ayano Shimizu Naiktha Bains Abigail Tere-Apisah 7–5, 7–5Loss 4–3 Feb 2018Burnie International, Australia60,000 Hard Chihiro Muramatsu Vania King Laura Robson 6–7(3), 1–6Loss 4–4 Mar 2018ITF Yokohama, Japan25,000 Hard Chihiro Muramatsu Laura Robson Fanny Stollár 7–5, 2–6, [4–10]Loss 4–5 Mar 2018Kōfu International Open, Japan25,000 Hard Erina Hayashi Gao Xinyu Luksika Kumkhum 0–6, 6–2, [4–10]Win 5–5 May 2018ITF Karuizawa, Japan25,000 Carpet Ayano Shimizu Chisa Hosonuma Kanako Morisaki 6–0, 6–3Win 6–5 Jul 2018ITF Denain, France25,000 Clay Ayano Shimizu Quirine Lemoine Eva Wacanno 0–6, 7–5, [10–7]Loss 6–6 Sep 2018ITF Nanao, Japan25,000 Carpet Ayano Shimizu Meguni Nishimoto Kanako Morisaki 2–6, 3–6Loss 6–7 Oct 2018ITF Hamamatsu, Japan25,000 Carpet Ayano Shimizu Erina Hayashi Miharu Imanishi 5–7, 4–6Loss 6–8 May 2019ITF Karuizawa, JapanW25 Carpet Erina Hayashi Ayaka Okuno Naomi Broady 3–6, 6–2, [7–10]Loss 6–9 Jun 2019ITF Hong Kong, China SARW25 Hard Erina Hayashi Junri Namigata Abigail Tere-Apisah 3–6, 6–2, [6–10]Loss 6–10 Jul 2019ITF Saskatoon, CanadaW25 Hard Haruka Kaji Hsu Chieh-yu Marcela Zacarías 3–6, 2–6Loss 6–11 Oct 2019ITF Makinohara, JapanW25 Carpet Erina Hayashi Eudice Chong Aldila Sutjiadi 7–6(5), 6–7(5), [4–10]Loss 6–12 Jan 2020ITF Hong Kong, China SARW25 Hard Mei Yamaguchi Mana Ayukawa Eudice Chong 4–6, 3–6Win 7–12 Mar 2021ITF Sharm El Sheikh, EgyptW15 Hard Ayano Shimizu Barbora Matúšová Anastasia Zolotareva 6–1, 6–2Win 8–12 Mar 2021ITF Sharm El Sheikh, EgyptW15 Hard Ayano Shimizu Alicia Barnett Yuriko Miyazaki 6–4, 6–1Win 9–12 Jun 2021ITF Lisbon, PortugalW25 Hard Han Na-lae Ingrid Martins Ma Shuyue 6–3, 6–1Win 10–12 Sep 2021Caldas da Rainha Open, PortugalW60+H Hard Hiroko Kuwata Alicia Barnett Olivia Nicholls 7–6(5), 7–6(2)Loss 10–13 Apr 2022ITF Chiang Rai, ThailandW25 Hard Luksika Kumkhum Gozal Ainitdinova Maria Timofeeva 6–2, 5–6, [4–10]Win 11–13 Jun 2022ITF Chiang Rai, ThailandW25 Hard Luksika Kumkhum Misaki Matsuda Naho Sato 6–3, 6–3Loss 11–14 Jun 2022ITF Gurugram, IndiaW25 Hard Misaki Matsuda Saki Imamura Priska Madelyn Nugroho 4–6, 5–7Loss 11–15 Jul 2022ITF Gurugram, IndiaW25 Hard Misaki Matsuda Ankita Raina Priska Madelyn Nugroho 6–3, 0–6, [6–10]Win 12–15 Jul 2022ITF Nur-Sultan, KazakhstanW25 Hard Ankita Raina Choi Ji-hee Han Na-lae 6–2, 3–6, [10–8]Loss 12–16 Jul 2022President's Cup, KazakhstanW60 Hard Moyuka Uchijima Mariia Tkacheva Anastasia Zolotareva 6–4, 1–6, [6–10]Win 13–16 Sep 2022ITF Darwin, AustraliaW25 Hard Luksika Kumkhum Yui Chikaraishi Nanari Katsumi 6–2, 7–6(3)Win 14–16 Oct 2022ITF Makinohara, Japan W25 Carpet Mayuka Aikawa Mana Ayukawa Riko Sawayanagi 6–4, 5–7, [10–7]Loss 14–17 Dec 2022Indoor Tennis Championships, JapanW60 Hard (i) Luksika Kumkhum Liang En-shuo Wu Fang-hsien 6–2, 6–7(5), [2–10]Win 15–17 May 2023ITF Karuizawa, JapanW25 Grass Ayano Shimizu Talia Gibson Akari Inoue 3–6, 7–6(6), [10–5]Loss 15–18 Jul 2023ITF Hong Kong, China SARW25 Hard Ayano Shimizu Erika Sema Aoi Ito 7–5, 3–6, [4–10]Win 16–18 Aug 2023ITF Hong Kong, China SARW40 Hard Ayano Shimizu Erika Sema Aoi Ito 3–6, 6–3, [11–9]Loss 16–19 Nov 2023Takasaki Open, JapanW100 Hard Ayano Shimizu Guo Hanyu Jiang Xinyu 6–7(5), 7–5, [5–10]Loss 16–20 May 2024Kurume Cup, JapanW75 Carpet Ayano Shimizu Madeleine Brooks Sarah Beth Grey 4–6, 0–6Win 17–20 Aug 2024ITF Nakhon Si Thammarat, ThailandW15 Hard Natsumi Kawaguchi Honoka Kobayashi Yukina Saigo 6–3, 6–4Loss 17–21 Aug 2024ITF Nakhon Si Thammarat, ThailandW35 Hard Natsumi Kawaguchi Kanako Morisaki Hikaru Sato 2–6, 3–6Loss 17–22 Sep 2024ITF Nanao, JapanW50 Carpet Ayano Shimizu Aoi Ito Naho Sato 1–6, 3–6Loss 17–23 Nov 2024ITF Hamamatsu, JapanW35 Carpet Ayano Shimizu Hiromi Abe Akiko Omae 0–6, 0–6Win 18–23 Nov 2024Takasaki Open, JapanW100 Hard Ayano Shimizu Liang En-shuo Tsao Chia-yi 4–6, 6–4, [10–3]Win 19–23 Nov 2024Yokohama Challenger, JapanW50 Hard Ayano Shimizu Cho I-hsuan Cho Yi-tsen 6–4, 7–6(2)Loss 19–24 Mar 2025ITF Kyoto, JapanW50 Hard (i) Ayano Shimizu Saki Imamura Park So-hyun 5–7, 4–6Win 20–24 Mar 2025Kōfu International Open, JapanW50 Hard Ayano Shimizu Akiko Omae Eri Shimizu 6–1, 6–4Win 21–24 Apr 2025ITF Osaka, JapanW35 Hard Ayano Shimizu Ku Yeon-woo Janice Tjen 6–4, 7–5Win 22–24 Apr 2025Kangaroo Cup Gifu, JapanW100 Hard Ayano Shimizu Emina Bektas Lily Miyazaki 6–1, 6–2Win 23–24 Apr 2025Fukuoka International, JapanW35 Hard Ayano Shimizu Miho Kuramochi Akiko Omae 4–6, 6–2, [10–8]Win 24–24 May 2025Kurume Cup, JapanW50+H Carpet Ayano Shimizu Ma Yexin Wang Meiling 6–1, 5–7, [10–5]Win 25–24 Aug 2025ITF Ourense, SpainW50 Hard Ayano Shimizu María Martínez Vaquero Alba Rey García 6–4, 6–1Win 26–24 Nov 2025Takasaki Open, JapanW100 Hard Ayano Shimizu Lee Ya-hsin Ye Qiuyu 3–6, 7–5, [12–10]Win 27–24 Mar 2026Kōfu International Open, JapanW75 Hard Ayano Shimizu Dang Yiming You Xiaodi 6–4, 6–4Win 28–24 Aug 2026Hamburg Ladies & Gents Cup, GermanyW50 Clay Ayano Shimizu Valeriya Strakhova Anastasia Tikhonova 6–4, 6–2Win 29–24 Aug 2026ITF Tianjin, ChinaW75 Hard Ayano Shimizu Li Yu-yun Zhang Ying 6–0, 4–6, [10–8]
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