Nombre: Ayumi Koshiishi
País: Japan
Fecha de nacimiento: 28.07.00, 25 años
WTA ranking: 638
TOP posición de la clasificación: 367 (21.07.25, 16500 puntos)
Puntos: 71
Dinero del premio: 94314 $
Partidos totales: 476
ganar: 296
%: 62.18 %
País: Japan
Fecha de nacimiento: 28.07.00, 25 años
WTA ranking: 638
TOP posición de la clasificación: 367 (21.07.25, 16500 puntos)
Puntos: 71
Dinero del premio: 94314 $
Partidos totales: 476
ganar: 296
%: 62.18 %
| año | resumen | Difícil | Arcilla | I. difícil | Alfombra | Césped | Acrílico |
| 2025 | 33/30 | 30/26 | 0/0 | 3/4 | 0/0 | 0/0 | 0/0 |
| 2024 | 45/31 | 34/23 | 1/1 | 9/5 | 1/2 | 0/0 | 0/0 |
| 2023 | 50/20 | 49/17 | 0/0 | 0/2 | 1/1 | 0/0 | 0/0 |
| 2022 | 20/12 | 16/8 | 0/0 | 3/3 | 1/1 | 0/0 | 0/0 |
| 2021 | 48/15 | 41/10 | 4/4 | 3/1 | 0/0 | 0/0 | 0/0 |
| 2020 | 25/9 | 9/4 | 16/5 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2019 | 22/23 | 13/13 | 5/5 | 4/3 | 0/2 | 0/0 | 0/0 |
| 2018 | 30/21 | 23/18 | 0/0 | 0/0 | 7/3 | 0/0 | 0/0 |
| 2017 | 13/12 | 7/5 | 0/0 | 0/1 | 6/6 | 0/0 | 0/0 |
| 2016 | 10/7 | 1/3 | 0/0 | 2/1 | 7/3 | 0/0 | 0/0 |
| TOTAL | 296/180 | 223/127 | 26/15 | 24/20 | 23/18 | 0/0 | 0/0 |
| porc. % | 62.18 % | 63.71 % | 63.41 % | 54.55 % | 56.1 % | 0 % | 0 % |
Ayumi Koshiishi / programado / pasado
| No se encontraron partidos |
Ayumi Koshiishi form / superficie: Difícil
Ayumi Koshiishi / superficie: Difícil
| 17.11.25 | calif. | Ya-Yi Yang | Ayumi Koshiishi | 6-3, 6-4 |  | match details |  W75 Sydney | Difícil |
| 16.11.25 | c 1 | Ayumi Koshiishi | Giselle Isabella Guillen | 6-0, 6-2 |  | match details | ||
| 14.11.25 | 1/4 | Sijia Wei | Ayumi Koshiishi | 6-1, 6-2 | | match details | W50 Brisbane | Difícil |
| 13.11.25 | 2da ronda | Ayumi Koshiishi | Arina Varaksina | 6-2, 7-65 | | match details | ||
| 11.11.25 | 1er ronda | Ayumi Koshiishi | Petra Hule | 6-3, 6-2 | | match details | ||
| 13.10.25 | c 1 | Priska Madelyn Nugroho | Ayumi Koshiishi | 6-72, 6-3, 7-5 | | match details |  Jinan | Difícil |
| 23.09.25 | 1er ronda | Misaki Matsuda | Ayumi Koshiishi | 6-4, 4-6, 6-2 | | match details |  W100 Incheon | Difícil |
| 11.09.25 | 2da ronda | Yufei Ren | Ayumi Koshiishi | 2-6, 6-4, 6-3 | | match details | W50 Guiyang | Difícil |
| 09.09.25 | 1er ronda | Ayumi Koshiishi | Kallista Liu | 7-68, 6-2 | | match details | ||
| 04.09.25 | 2da ronda | Yeon Woo Ku | Ayumi Koshiishi | 6-0, 6-2 | | match details |  W35 Nakhon | Difícil |
| 03.09.25 | 1er ronda | Ayumi Koshiishi | Hikaru Sato | 6-4, 6-2 | | match details | ||
| 26.08.25 | 1er ronda | Eunhye Lee | Ayumi Koshiishi | 7-60, 6-3 | | match details | W35 Nakhon | Difícil |
| 05.08.25 | 1er ronda | Eva Guerrero Alvarez | Ayumi Koshiishi | 6-3, 6-4 | | match details |  W50 Ourense | Difícil |
| 29.07.25 | 1er ronda | Nao Nishino | Ayumi Koshiishi | 6-4, 6-4 | | match details |  W35 Roehampton | Difícil |
| 22.07.25 | 1er ronda | Misaki Matsuda | Ayumi Koshiishi | 6-3, 6-1 | | match details |  W35 Monastir | Difícil |
| 17.07.25 | 1/4 | Vendula Valdmannova | Ayumi Koshiishi | 6-0, 6-1 | | match details | W50 Nottingham | Difícil |
| 17.07.25 | 2da ronda | Ayumi Koshiishi | Klara Veldman | 6-4, 6-2 | | match details | ||
| 16.07.25 | 1er ronda | Ayumi Koshiishi | Mia Wainwright | 6-2, 6-3 | | match details | ||
| 13.06.25 | 1/4 | Meiling Wang | Ayumi Koshiishi | 6-3, 6-0 | | match details | W35 Luzhou | Difícil |
| 12.06.25 | 2da ronda | Ayumi Koshiishi | Amy Zhu | 6-3, 6-2 | | match details | ||
| 11.06.25 | 1er ronda | Ayumi Koshiishi | Viktoria Morvayova | 4-6, 6-2, 6-2 | | match details | ||
| 22.05.25 | 2da ronda | Dayeon Back | Ayumi Koshiishi | 6-0, 6-3 | | match details | W35 Andong | Difícil |
| 21.05.25 | 1er ronda | Ayumi Koshiishi | Eunhye Lee | 6-3, 6-1 | | match details | ||
| 19.05.25 | calif. | Ayumi Koshiishi | Hiroko Kuwata | 7-62, 6-1 | | match details | ||
| 19.05.25 | c 2 | Ayumi Koshiishi | Nanari Katsumi | 6-1, 6-4 | | match details | ||
| 16.05.25 | 1/4 | Wushuang Zheng | Ayumi Koshiishi | 6-4, 6-3 | | match details | W35 Changwon | Difícil |
| 16.05.25 | 2da ronda | Ayumi Koshiishi | Ena Koike | 6-3, 6-3 | | match details | ||
| 14.05.25 | 1er ronda | Ayumi Koshiishi | Hikaru Sato | 6-2, 6-2 | | match details | ||
| 08.05.25 | 2da ronda | Zongyu Li | Ayumi Koshiishi | 6-4, 6-2 | | match details | W35 Goyang | Difícil |
| 07.05.25 | 1er ronda | Ayumi Koshiishi | Yeri Hong | 4-6, 7-5, 6-1 | | match details | ||
| 02.05.25 | 1/4 | Rina Saigo | Ayumi Koshiishi | 6-4, 6-1 | | match details | W35 Goyang | Difícil |
| 02.05.25 | 2da ronda | Ayumi Koshiishi | Anastasia Zolotareva | 6-75, 6-4, 6-3 | | match details | ||
| 30.04.25 | 1er ronda | Ayumi Koshiishi | Eunhye Lee | 6-2, 6-2 | | match details | ||
| 23.04.25 | 1er ronda | Wakana Sonobe | Ayumi Koshiishi | 6-4, 6-1 | | match details |  W100 Tokyo | Difícil |
| 22.04.25 | calif. | Eri Shimizu | Ayumi Koshiishi | 6-3, 6-3 | | match details | ||
| 21.04.25 | c 1 | Ayumi Koshiishi | Su Jeong Jang | 2-6, 6-1, 6-1 | | match details | ||
| 09.04.25 | 1er ronda | Yexin Ma | Ayumi Koshiishi | 3-6, 6-4, 6-1 | | match details | W35 Osaka | Difícil |
| 07.04.25 | c 2 | Ayumi Koshiishi | Yui Chikaraishi | 6-4, 6-2 | | match details | ||
| 07.04.25 | calif. | Ayumi Koshiishi | Natsuki Yoshimoto | 6-1, 6-4 | | match details | ||
| 18.03.25 | 1er ronda | Kyoka Okamura | Ayumi Koshiishi | 6-3, 6-3 | | match details | W50 Kofu | Difícil |
| 28.02.25 | 1/4 | Sakura Hosogi | Ayumi Koshiishi | 7-65, 6-3 | | match details | W35 Launceston | Difícil |
| 27.02.25 | 2da ronda | Ayumi Koshiishi | Miho Kuramochi | 6-2, 1-6, 7-66 | | match details | ||
| 25.02.25 | 1er ronda | Ayumi Koshiishi | Alana Parnaby | 7-5, 6-2 | | match details | ||
| 21.02.25 | 1/4 | Jaimee Fourlis | Ayumi Koshiishi | 6-4, 6-1 | | match details | W35 Burnie | Difícil |
| 20.02.25 | 2da ronda | Ayumi Koshiishi | Alicia Dale | 7-5, 6-4 | | match details | ||
| 18.02.25 | 1er ronda | Ayumi Koshiishi | Elena Micic | 5-7, 6-3, 6-1 | | match details | ||
| 13.02.25 | 2da ronda | Miho Kuramochi | Ayumi Koshiishi | 7-5, 6-3 | | match details |  W35 Timaru | Difícil |
| 12.02.25 | 1er ronda | Ayumi Koshiishi | Monique Barry | 6-2, 6-2 | | match details | ||
| 03.02.25 | calif. | Mingge Xu | Ayumi Koshiishi | 6-1, 6-3 | | match details | W75 Brisbane | Difícil |
| 02.02.25 | c 1 | Ayumi Koshiishi | Alicia Smith | 5-2, Alicia Smith - retirado | | match details | ||
| 13.01.25 | calif. | Georgia Andreea Craciun | Ayumi Koshiishi | 7-60, 7-68 | | match details |  W50 New | Difícil |
| 12.01.25 | c 1 | Ayumi Koshiishi | Eva Garkusha | 6-1, 6-1 | | match details | ||
| 09.01.25 | 2da ronda | Xinxin Yao | Ayumi Koshiishi | 6-0, 6-1 | | match details | W75 Nonthaburi | Difícil |
| 08.01.25 | 1er ronda | Ayumi Koshiishi | Eudice Wong Chong | 6-2, 4-6, 6-4 | | match details | ||
| 06.01.25 | calif. | Ayumi Koshiishi | Lunda Kumhom | 6-0, 6-0 | | match details | ||
| 05.01.25 | c 1 | Ayumi Koshiishi | Meiling Wang | 6-3, 6-0 | | match details | ||
| 30.12.24 | c 1 | Saki Imamura | Ayumi Koshiishi | 6-3, 6-2 | | match details | W75 Nonthaburi | Difícil |
| 25.11.24 | calif. | Kayo Nishimura | Ayumi Koshiishi | 6-4, 6-1 | | match details | W50 Yokohama | Difícil |
| 24.11.24 | c 1 | Ayumi Koshiishi | Honoka Kobayashi | 7-5, 1-6, 6-2 | | match details | ||
| 18.11.24 | c 1 | Honoka Kobayashi | Ayumi Koshiishi | 7-68, 6-4 | | match details | W100 Takasaki | Difícil |
| 19.09.24 | 2da ronda | Talia Gibson | Ayumi Koshiishi | 6-1, 3-6, 6-2 | | match details | W75 Perth | Difícil |
| 17.09.24 | 1er ronda | Ayumi Koshiishi | Sakura Hosogi | 4-6, 6-2, 6-4 | | match details | ||
| 16.09.24 | calif. | Ayumi Koshiishi | Carolann Delaunay | 6-0, 6-0 | | match details | ||
| 15.09.24 | c 1 | Ayumi Koshiishi | Madison Frahn | 6-4, 6-0 | | match details | ||
| 11.09.24 | 1er ronda | Aoi Ito | Ayumi Koshiishi | 7-5, 6-1 | | match details | W75 Perth | Difícil |
| 09.09.24 | calif. | Ayumi Koshiishi | Viktoria Morvayova | 7-5, 6-0 | | match details | ||
| 08.09.24 | c 1 | Ayumi Koshiishi | Mahta Khanloo | 6-0, 6-3 | | match details | ||
| 06.09.24 | 1/4 | Aoi Ito | Ayumi Koshiishi | 6-1, 1-6, 6-2 | | match details | W100 Incheon | Difícil |
| 05.09.24 | 2da ronda | Ayumi Koshiishi | Ayano Shimizu | 6-2, 6-1 | | match details | ||
| 04.09.24 | 1er ronda | Ayumi Koshiishi | Arianne Hartono | 6-2, 6-3 | | match details | ||
| 02.09.24 | calif. | Ayumi Koshiishi | Jimin Kwon | 6-3, 6-1 | | match details | ||
| 01.09.24 | c 1 | Ayumi Koshiishi | Yujin Kim | 6-0, 7-60 | | match details | ||
| 26.08.24 | calif. | Qianhui Tang | Ayumi Koshiishi | 6-3, 1-6, 7-64 | | match details | W50 Jinan | Difícil |
| 25.08.24 | c 1 | Ayumi Koshiishi | Yanni Liu | 6-4, 6-4 | | match details | ||
| 04.08.24 | fin | Anastasia Gasanova | Ayumi Koshiishi | 6-2, 6-1 | | match details |  W15 Ust | Difícil |
| 03.08.24 | 1/2 | Ayumi Koshiishi | Ekaterina Ovcharenko | 2-6, 6-3, 6-0 | | match details | ||
| 02.08.24 | 1/4 | Ayumi Koshiishi | Elena Malygina | 2-6, 6-3, 6-3 | | match details | ||
| 01.08.24 | 2da ronda | Ayumi Koshiishi | Aruzhan Sagandikova | 6-3, 6-0 | | match details | ||
| 30.07.24 | 1er ronda | Ayumi Koshiishi | Daria Zelinskaya | 7-5, 6-3 | | match details | ||
| 25.07.24 | 2da ronda | Elena Malygina | Ayumi Koshiishi | 6-3, 6-1 | | match details | W35 Astana | Difícil |
| 24.07.24 | 1er ronda | Ayumi Koshiishi | Aruzhan Sagandikova | 6-3, 6-3 | | match details | ||
| 21.07.24 | fin | Hikaru Sato | Ayumi Koshiishi | 6-4, 6-4 | | match details | W15 Nakhon | Difícil |
| 20.07.24 | 1/2 | Ayumi Koshiishi | Punnin Kovapitukted | 2-6, 6-1, 6-0 | | match details | ||
| 19.07.24 | 2da ronda | Ayumi Koshiishi | Shihomi Li Xuan Leong | 6-3, 6-75, 6-3 | | match details | ||
| 19.07.24 | 1/4 | Ayumi Koshiishi | Yuno Kitahara | 6-2, 6-0 | | match details | ||
| 17.07.24 | 1er ronda | Ayumi Koshiishi | Humera Baharmus | 6-0, 6-3 | | match details | ||
| 12.07.24 | 1/4 | Alicia Smith | Ayumi Koshiishi | 0-6, 6-2, 6-1 | | match details | W15 Nakhon | Difícil |
| 11.07.24 | 2da ronda | Ayumi Koshiishi | Sonal Patil | 6-3, 6-1 | | match details | ||
| 09.07.24 | 1er ronda | Ayumi Koshiishi | Watsachol Sawatdee | 6-4, 6-2 | | match details | ||
| 04.07.24 | 2da ronda | Eri Shimizu | Ayumi Koshiishi | 7-5, 6-3 | | match details | W35 Nakhon | Difícil |
| 03.07.24 | 1er ronda | Ayumi Koshiishi | Sonal Patil | 6-2, 6-76, 6-3 | | match details | ||
| 05.06.24 | 1er ronda | Rina Saigo | Ayumi Koshiishi | 6-2, 5-7, 6-1 | | match details | W35 Daegu | Difícil |
| 03.06.24 | calif. | Ayumi Koshiishi | Hwiwon Wi | 6-1, 6-1 | | match details | ||
| 02.06.24 | c 1 | Ayumi Koshiishi | Yesung Choo | 6-3, 6-0 | | match details | ||
| 26.05.24 | c 1 | Jeong Moon | Ayumi Koshiishi | 7-63, 0-6, 10-4 | | match details | W35 Changwon | Difícil |
| 22.05.24 | 1er ronda | Zongyu Li | Ayumi Koshiishi | 6-4, 6-1 | | match details | W50 Goyang | Difícil |
| 20.05.24 | calif. | Ayumi Koshiishi | Rina Saigo | 7-64, 7-5 | | match details | ||
| 19.05.24 | c 1 | Ayumi Koshiishi | Da Hye Kim | 7-5, 2-0, Da Hye Kim - retirado | | match details | ||
| 24.04.24 | 1er ronda | Qiang Wang | Ayumi Koshiishi | 6-2, 6-1 | | match details | W50 Wuning | Difícil |
| 22.04.24 | calif. | Ayumi Koshiishi | Jiayou Li | 6-4, 6-1 | | match details | ||
| 21.04.24 | c 1 | Ayumi Koshiishi | Jiumeng Liu | 6-1, 6-0 | | match details | ||
| 14.04.24 | c 1 | Eunhye Lee | Ayumi Koshiishi | 6-3, 4-6, 6-3 | | match details | W50 Shenzhen | Difícil |
| 08.04.24 | calif. | Rina Saigo | Ayumi Koshiishi | 6-3, 6-4 | | match details | W35 Osaka | Difícil |
| 07.04.24 | c 1 | Ayumi Koshiishi | Suzuna Oigawa | 6-0, 4-6, 10-3 | | match details | ||
| 07.04.24 | c 2 | Ayumi Koshiishi | Mei Hasegawa | 6-3, 7-65 | | match details | ||
| 24.03.24 | c 1 | Erika Sema | Ayumi Koshiishi | 6-2, 6-0 | | match details | W50 Kofu | Difícil |
| 13.03.24 | 1er ronda | Dalila Jakupovic | Ayumi Koshiishi | 6-3, 6-1 | | match details | W35 Indore | Difícil |
| 12.03.24 | calif. | Ayumi Koshiishi | Mei Hasegawa | 6-3, 6-1 | | match details | ||
| 11.03.24 | c 2 | Ayumi Koshiishi | Laalitya Kalluri | 6-0, 6-2 | | match details | ||
| 28.02.24 | 1er ronda | Sahaja Yamalapalli | Ayumi Koshiishi | 6-4, 6-2 | | match details | W35 Gurugram | Difícil |
| 30.01.24 | calif. | Amelia Waligora | Ayumi Koshiishi | 6-4, 6-4 | | match details |  W35 Sharm | Difícil |
| 29.01.24 | c 2 | Ayumi Koshiishi | Jane Dunyon | 6-0, 6-2 | | match details | ||
| 22.01.24 | c 2 | Saoirse Breen | Ayumi Koshiishi | 5-7, 6-3, 12-10 | | match details | W35 Monastir | Difícil |
| 12.12.23 | calif. | Jenny Lim | Ayumi Koshiishi | 6-2, 6-3 | | match details | W25 Monastir | Difícil |
| 11.12.23 | c 2 | Ayumi Koshiishi | Yingqun Sun | 6-0, 6-0 | | match details | ||
| 06.12.23 | 1er ronda | Andreea Prisacariu | Ayumi Koshiishi | 6-3, 6-2 | | match details | W25 Monastir | Difícil |
| 05.12.23 | calif. | Ayumi Koshiishi | Annelin Bakker | 6-1, 4-6, 10-8 | | match details | ||
| 04.12.23 | c 2 | Ayumi Koshiishi | Ioana Zvonaru | 1-6, 6-1, 10-8 | | match details | ||
| 22.10.23 | fin | Ayumi Koshiishi | Shrivalli Rashmikaa Bhamidipaty | 6-2, 6-1 | | match details | W15 Hua | Difícil |
| 21.10.23 | 1/2 | Ayumi Koshiishi | Patcharin Cheapchadej | 6-3, 1-6, 6-1 | | match details | ||
| 20.10.23 | 1/4 | Ayumi Koshiishi | Salakthip Ounmuang | 6-4, 6-3 | | match details | ||
| 19.10.23 | 2da ronda | Ayumi Koshiishi | Demi Tran | 6-3, 6-1 | | match details | ||
| 18.10.23 | 1er ronda | Ayumi Koshiishi | Pawinee Ruamrak | 6-2, 6-0 | | match details | ||
| 03.09.23 | c 1 | Peangtarn Plipuech | Ayumi Koshiishi | 6-4, 6-0 | | match details | W100 Tokyo | Difícil |
| 21.08.23 | calif. | Daria Kudashova | Ayumi Koshiishi | 6-2, 3-6, 7-5 | | match details |  W40 Hong | Difícil |
| 20.08.23 | c 1 | Ayumi Koshiishi | Kanako Morisaki | 6-4, 6-2 | | match details | ||
| 13.08.23 | fin | Ayumi Koshiishi | Aruzhan Sagandikova | 6-2, 6-2 | | match details | W15 Ust | Difícil |
| 12.08.23 | 1/2 | Ayumi Koshiishi | Sonja Zhiyenbayeva | 6-3, 6-4 | | match details | ||
| 11.08.23 | 1/4 | Ayumi Koshiishi | Anastasia Grechkina | 6-2, 1-6, 6-4 | | match details | ||
| 10.08.23 | 2da ronda | Ayumi Koshiishi | Alisa Kummel | 6-4, 6-3 | | match details | ||
| 08.08.23 | 1er ronda | Ayumi Koshiishi | Maria Kalyakina | 7-65, 7-5 | | match details | ||
| 03.08.23 | 2da ronda | Anastasia Zakharova | Ayumi Koshiishi | 6-4, 6-75, 6-2 | | match details | W25 Astana | Difícil |
| 02.08.23 | 1er ronda | Ayumi Koshiishi | Darya Shauha | 7-66, 3-6, 6-2 | | match details | ||
| 23.07.23 | fin | Ayumi Koshiishi | Sofia Camila Rojas | 6-4, 6-2 | | match details | W15 Monastir | Difícil |
| 22.07.23 | 1/2 | Ayumi Koshiishi | Katarina Kuzmova | 4-1, Katarina Kuzmova - retirado | | match details | ||
| 21.07.23 | 1/4 | Ayumi Koshiishi | Sophia Biolay | 6-2, 6-2 | | match details | ||
| 20.07.23 | 2da ronda | Ayumi Koshiishi | Helena Buchwald | 6-3, 2-0, Helena Buchwald - retirado | | match details | ||
| 18.07.23 | 1er ronda | Ayumi Koshiishi | Elizaveta Shebekina | 6-1, 6-2 | | match details | ||
| 16.07.23 | fin | Ayumi Koshiishi | Camilla Zanolini | 6-0, Camilla Zanolini - retirado | | match details | W15 Monastir | Difícil |
| 15.07.23 | 1/2 | Ayumi Koshiishi | Lara Pfeifer | 6-1, 6-4 | | match details | ||
| 14.07.23 | 1/4 | Ayumi Koshiishi | Karine Marion Job | 6-1, 6-2 | | match details | ||
| 13.07.23 | 2da ronda | Ayumi Koshiishi | Raquel Gonzalez Vilar | 6-0, 6-0 | | match details | ||
| 11.07.23 | 1er ronda | Ayumi Koshiishi | Margherita Marcon | 6-0, 6-4 | | match details | ||
| 07.07.23 | 1/4 | Camilla Zanolini | Ayumi Koshiishi | 6-3, 6-1 | | match details | W15 Monastir | Difícil |
| 06.07.23 | 2da ronda | Ayumi Koshiishi | June Bjork | 6-2, 6-3 | | match details | ||
| 05.07.23 | 1er ronda | Ayumi Koshiishi | Cristina Elena Tiglea | 6-2, 6-4 | | match details | ||
| 27.06.23 | 1er ronda | Anja Wildgruber | Ayumi Koshiishi | 1-6, 2-1, Ayumi Koshiishi - retirado | | match details | W15 Monastir | Difícil |
| 17.06.23 | 1/2 | Natsuki Yoshimoto | Ayumi Koshiishi | 6-0, 6-0 | | match details | W15 Kawaguchi | Difícil |
| 16.06.23 | 2da ronda | Ayumi Koshiishi | Rio Tsuda | 6-4, 6-1 | | match details | ||
| 16.06.23 | 1/4 | Ayumi Koshiishi | Yuika Ikawa | 6-3, 4-6, 6-1 | | match details | ||
| 14.06.23 | 1er ronda | Ayumi Koshiishi | Kisa Yoshioka | 7-68, 6-3 | | match details | ||
| 31.05.23 | 1er ronda | Yukina Saigo | Ayumi Koshiishi | 6-4, 6-1 | | match details | W25 Tokyo | Difícil |
| 22.05.23 | calif. | Yi Tsen Cho | Ayumi Koshiishi | 6-2, 6-0 | | match details | W25 Goyang | Difícil |
| 21.05.23 | c 1 | Ayumi Koshiishi | Eunji Lee | 6-3, 6-3 | | match details | ||
| 15.05.23 | c 2 | Ayumi Koshiishi | Qianhui Tang | 5-7, 6-3, 10-4 | | match details | W25 Incheon | Difícil |
| 15.05.23 | calif. | Yujin Ahn | Ayumi Koshiishi | 6-4, 6-3 | | match details | ||
| 10.04.23 | c 2 | Ramu Ueda | Ayumi Koshiishi | 6-3, Ayumi Koshiishi - retirado | | match details | W25 Osaka | Difícil |
| 09.04.23 | c 1 | Ayumi Koshiishi | Kurea Hayasaka | 7-63, 6-4 | | match details | ||
| 03.04.23 | calif. | Katarina Kozarov | Ayumi Koshiishi | 6-0, 6-3 | | match details | W25 Kashiwa | Difícil |
| 02.04.23 | c 1 | Ayumi Koshiishi | Aoi Hirata | 6-3, 6-4 | | match details | ||
| 29.03.23 | 1er ronda | Eri Hozumi | Ayumi Koshiishi | 6-4, 6-2 | | match details | W25 Kofu | Difícil |
| 26.03.23 | 1/2 | Natsumi Kawaguchi | Ayumi Koshiishi | 6-1, 6-2 | | match details | W15 Hinode | Difícil |
| 24.03.23 | 1/4 | Ayumi Koshiishi | Yuka Hosoki | 5-7, 6-2, 6-0 | | match details | ||
| 23.03.23 | 2da ronda | Ayumi Koshiishi | Chisa Hosonuma | 6-2, 6-1 | | match details | ||
| 22.03.23 | 1er ronda | Ayumi Koshiishi | Momoko Nishio | 6-4, 7-63 | | match details | ||
| 05.03.23 | fin | Ayumi Koshiishi | Hanyu Guo | 5-7, 6-2, 6-1 | | match details |  W15 Kuching | Difícil |
| 04.03.23 | 1/2 | Ayumi Koshiishi | Shuo Feng | 6-0, 6-1 | | match details | ||
| 03.03.23 | 1/4 | Ayumi Koshiishi | Aoi Ito | 6-1, 7-64 | | match details | ||
| 02.03.23 | 2da ronda | Ayumi Koshiishi | Kisa Yoshioka | 6-3, 6-2 | | match details | ||
| 01.03.23 | 1er ronda | Ayumi Koshiishi | Jo-Leen Saw | 6-2, 6-0 | | match details | ||
| 26.02.23 | fin | Hanyu Guo | Ayumi Koshiishi | 6-4, 6-3 | | match details | W15 Kuala | Difícil |
| 25.02.23 | 1/2 | Ayumi Koshiishi | Aunchisa Chanta | 6-4, 7-5 | | match details | ||
| 24.02.23 | 1/4 | Ayumi Koshiishi | Riko Sawayanagi | 6-3, 7-61 | | match details | ||
| 23.02.23 | 2da ronda | Ayumi Koshiishi | Meiqi Guo | 6-3, 6-1 | | match details | ||
| 21.02.23 | 1er ronda | Ayumi Koshiishi | Yi Tsen Cho | 0-6, 7-65, 1-0, Yi Tsen Cho - retirado | | match details | ||
| 18.02.23 | 1/2 | Lanlana Tararudee | Ayumi Koshiishi | 6-4, 7-5 | | match details | W15 Ipoh | Difícil |
| 17.02.23 | 1/4 | Ayumi Koshiishi | Dabin Kim | 6-2, 7-5 | | match details | ||
| 16.02.23 | 2da ronda | Ayumi Koshiishi | Sara Nayar | 6-4, 6-3 | | match details | ||
| 15.02.23 | 1er ronda | Ayumi Koshiishi | Shanelle Iaconi | 6-2, 6-2 | | match details | ||
| 21.05.22 | 1/2 | Ayumi Morita | Ayumi Koshiishi | 6-3, 6-3 | | match details | W15 Monastir | Difícil |
| 20.05.22 | 1/4 | Ayumi Koshiishi | Anja Wildgruber | 6-3, 6-2 | | match details | ||
| 19.05.22 | 2da ronda | Ayumi Koshiishi | Sijia Wei | 6-4, 6-1 | | match details | ||
| 18.05.22 | 1er ronda | Ayumi Koshiishi | Yu Shan | 6-2, 6-4 | | match details | ||
| 15.05.22 | fin | Fangzhou Liu | Ayumi Koshiishi | 6-4, 7-5 | | match details | W15 Monastir | Difícil |
| 14.05.22 | 1/2 | Ayumi Koshiishi | Aleksandra Pospelova | 6-1, 6-4 | | match details | ||
| 12.05.22 | 2da ronda | Ayumi Koshiishi | Milana Zhabrailova | 6-2, 3-6, 6-1 | | match details | ||
| 12.05.22 | 1/4 | Ayumi Koshiishi | Chiraz Bechri | Chiraz Bechri - walk over | | match details | ||
| 11.05.22 | 1er ronda | Ayumi Koshiishi | Niditra Rajmohan | 2-0, Niditra Rajmohan - retirado | | match details | ||
| 06.05.22 | 1/4 | Adithya Karunaratne | Ayumi Koshiishi | 2-6, 6-0, 6-1 | | match details | W25 Monastir | Difícil |
| 05.05.22 | 2da ronda | Ayumi Koshiishi | Jia-Jing Lu | 7-64, 3-6, 6-3 | | match details | ||
| 04.05.22 | 1er ronda | Ayumi Koshiishi | Emilie Lindh Gallagher | 5-7, 6-3, 6-1 | | match details | ||
| 27.04.22 | 1er ronda | Meiling Wang | Ayumi Koshiishi | 7-65, 6-0 | | match details | W25 Monastir | Difícil |
| 26.04.22 | calif. | Ayumi Koshiishi | Yasmine Mansouri | 6-2, 6-3 | | match details | ||
| 25.04.22 | c 2 | Ayumi Koshiishi | Sahaja Yamalapalli | 6-4, 6-1 | | match details | ||
| 20.04.22 | 1er ronda | Vitalia Diatchenko | Ayumi Koshiishi | 6-75, 6-3, 6-2 | | match details | W25 Monastir | Difícil |
| 19.04.22 | calif. | Ayumi Koshiishi | Xinxin Yao | 6-4, 6-2 | | match details | ||
| 18.04.22 | c 2 | Ayumi Koshiishi | Maria Navarro Oliva | 7-63, 7-62 | | match details | ||
| 17.04.22 | c 1 | Ayumi Koshiishi | Ashmitha Easwaramurthi | 6-1, 6-2 | | match details | ||
| 23.02.22 | 1er ronda | Mirra Andreeva | Ayumi Koshiishi | 7-60, 3-6, 7-62 | | match details | W15 Sharm | Difícil |
| 24.01.22 | c 2 | Anna Turati | Ayumi Koshiishi | 7-64, 6-4 | | match details | W25 Manacor | Difícil |
| 23.01.22 | c 1 | Ayumi Koshiishi | Cristina Diaz Adrover | 6-1, 6-1 | | match details | ||
| 17.01.22 | c 2 | Ashley Lahey | Ayumi Koshiishi | 6-3, 3-6, 10-7 | | match details | W25 Manacor | Difícil |
| 16.01.22 | c 1 | Ayumi Koshiishi | Milan Krish | 6-1, 6-0 | | match details | ||
| 17.11.21 | 1er ronda | Kristina Kucova | Ayumi Koshiishi | 6-1, 6-2 | | match details |  W25 Funchal | Difícil |
| 15.11.21 | calif. | Ayumi Koshiishi | Yu-Chieh Hsieh | 6-3, 6-3 | | match details | ||
| 22.08.21 | fin | Ayumi Koshiishi | Ekaterina Reyngold | 6-73, 7-62, 6-1 | | match details | W15 Monastir | Difícil |
| 21.08.21 | 1/2 | Ayumi Koshiishi | Himeno Sakatsume | 6-1, 6-1 | | match details | ||
| 20.08.21 | 1/4 | Ayumi Koshiishi | Aglaya Fedorova | 6-2, 6-1 | | match details | ||
| 19.08.21 | 2da ronda | Ayumi Koshiishi | Yuka Hosoki | 6-3, 6-1 | | match details | ||
| 18.08.21 | 1er ronda | Ayumi Koshiishi | Hina Inoue | 6-0, 6-1 | | match details | ||
| 15.08.21 | fin | Ayumi Koshiishi | Himeno Sakatsume | 6-3, 7-63 | | match details | W15 Monastir | Difícil |
| 14.08.21 | 1/2 | Ayumi Koshiishi | Lauren Proctor | 6-2, 7-67 | | match details | ||
| 13.08.21 | 1/4 | Ayumi Koshiishi | Raveena Kingsley | 6-1, 6-4 | | match details | ||
| 12.08.21 | 2da ronda | Ayumi Koshiishi | Ramu Ueda | 6-4, 6-1 | | match details | ||
| 11.08.21 | 1er ronda | Ayumi Koshiishi | Beatrice Laura Pirtac | 6-0, 6-0 | | match details | ||
| 07.08.21 | 1/2 | Akvile Parazinskaite | Ayumi Koshiishi | 6-2, 6-2 | | match details | W15 Monastir | Difícil |
| 06.08.21 | 1/4 | Ayumi Koshiishi | Raveena Kingsley | 6-3, 6-3 | | match details | ||
| 05.08.21 | 2da ronda | Ayumi Koshiishi | Dasha Ivanova | 6-1, 6-2 | | match details | ||
| 04.08.21 | 1er ronda | Ayumi Koshiishi | Chiraz Bechri | 6-3, 6-1 | | match details | ||
| 01.08.21 | fin | Ayumi Koshiishi | Eliessa Vanlangendonck | 6-1, 6-0 | | match details | W15 Monastir | Difícil |
| 31.07.21 | 1/2 | Ayumi Koshiishi | Jessica Failla | 6-2, 6-3 | | match details | ||
| 30.07.21 | 1/4 | Ayumi Koshiishi | Mariana Drazic | 6-2, 6-3 | | match details | ||
| 29.07.21 | 2da ronda | Ayumi Koshiishi | Olga Helmi | 6-1, 7-5 | | match details | ||
| 28.07.21 | 1er ronda | Ayumi Koshiishi | Lauren Proctor | 6-3, 6-2 | | match details | ||
| 25.07.21 | fin | Dalayna Hewitt | Ayumi Koshiishi | 6-4, 6-4 | | match details | W15 Monastir | Difícil |
| 24.07.21 | 1/2 | Ayumi Koshiishi | Tiphanie Lemaitre | 6-4, 6-3 | | match details | ||
| 23.07.21 | 1/4 | Ayumi Koshiishi | Eliessa Vanlangendonck | 6-4, 6-3 | | match details | ||
| 22.07.21 | 2da ronda | Ayumi Koshiishi | Katarina Kozarov | 6-2, 6-1 | | match details | ||
| 21.07.21 | 1er ronda | Ayumi Koshiishi | Giorgia Pinto | 6-0, 6-0 | | match details | ||
| 17.07.21 | 1/2 | Eliessa Vanlangendonck | Ayumi Koshiishi | 6-1, 4-6, 6-2 | | match details | W15 Monastir | Difícil |
| 16.07.21 | 1/4 | Ayumi Koshiishi | Chiraz Bechri | 6-2, 6-4 | | match details | ||
| 15.07.21 | 2da ronda | Ayumi Koshiishi | Anastasia Nefedova | 3-6, 7-62, 6-3 | | match details | ||
| 14.07.21 | 1er ronda | Ayumi Koshiishi | Paris Corley | 6-2, 6-1 | | match details | ||
| 09.07.21 | 1/4 | Angelica Raggi | Ayumi Koshiishi | 6-3, 6-2 | | match details | W15 Monastir | Difícil |
| 08.07.21 | 2da ronda | Ayumi Koshiishi | Chiraz Bechri | 6-3, 6-2 | | match details | ||
| 06.07.21 | 1er ronda | Ayumi Koshiishi | Emma Davis | 7-5, 6-0 | | match details | ||
| 29.06.21 | 1er ronda | Elizabeth Mandlik | Ayumi Koshiishi | 1-6, 6-1, 6-4 | | match details | W15 Monastir | Difícil |
| 23.05.21 | fin | Olga Helmi | Ayumi Koshiishi | 6-3, 6-2 | | match details | W15 Monastir | Difícil |
| 22.05.21 | 1/2 | Ayumi Koshiishi | Sakura Hosogi | 2-6, 6-1, 6-3 | | match details | ||
| 21.05.21 | 1/4 | Ayumi Koshiishi | Angelica Raggi | 6-4, 6-2 | | match details | ||
| 20.05.21 | 2da ronda | Ayumi Koshiishi | Chiara Scholl | 6-2, 6-3 | | match details | ||
| 19.05.21 | 1er ronda | Ayumi Koshiishi | Jasmijn Gimbrere | 6-4, 6-1 | | match details | ||
| 11.05.21 | 1er ronda | Erika Sema | Ayumi Koshiishi | 6-3, 7-61 | | match details | W15 Monastir | Difícil |
| 07.05.21 | 1/4 | Miharu Imanishi | Ayumi Koshiishi | 4-6, 6-2, 6-4 | | match details | W15 Monastir | Difícil |
| 06.05.21 | 2da ronda | Ayumi Koshiishi | Gozal Ainitdinova | 6-1, 6-1 | | match details | ||
| 05.05.21 | 1er ronda | Ayumi Koshiishi | Irys Ekani | 6-4, 2-0, Irys Ekani - retirado | | match details | ||
| 04.05.21 | calif. | Ayumi Koshiishi | Olivia Gram | 6-2, 6-1 | | match details | ||
| 03.05.21 | c 1 | Ayumi Koshiishi | Giulia Sartori | 6-3, 6-1 | | match details | ||
| 03.05.21 | c 2 | Ayumi Koshiishi | Tara Malik | 6-3, 6-4 | | match details | ||
| 29.04.21 | 2da ronda | Miharu Imanishi | Ayumi Koshiishi | 5-7, 6-3, 7-63 | | match details | W15 Monastir | Difícil |
| 28.04.21 | 1er ronda | Ayumi Koshiishi | Sara Akid | 6-0, 6-1 | | match details | ||
| 27.04.21 | calif. | Ayumi Koshiishi | Olga Helmi | 4-6, 7-66, 10-6 | | match details | ||
| 26.04.21 | c 2 | Ayumi Koshiishi | Laura Mair | 4-6, 6-1, 10-4 | | match details | ||
| 26.04.21 | c 1 | Ayumi Koshiishi | Giulia Carbonaro | 6-4, 5-7, 10-2 | | match details | ||
| 23.02.20 | c 1 | Alana Parnaby | Ayumi Koshiishi | 2-6, 6-4, 17-15 | | match details | W25 Perth | Difícil |
| 18.02.20 | calif. | Alicia Smith | Ayumi Koshiishi | 7-5, 7-62 | | match details | W25 Perth | Difícil |
| 17.02.20 | c 2 | Ayumi Koshiishi | Lara Tovich | 6-0, 6-0 | | match details | ||
| 16.02.20 | c 1 | Ayumi Koshiishi | Luna Jokanovic | 6-1, 6-4 | | match details | ||
| 30.01.20 | 2da ronda | Margot Yerolymos | Ayumi Koshiishi | 6-2, 6-3 | | match details | W15 Manacor | Difícil |
| 29.01.20 | 1er ronda | Ayumi Koshiishi | Fiona Ganz | 6-1, 6-4 | | match details | ||
| 28.01.20 | calif. | Ayumi Koshiishi | Eun Ji Lee | 6-0, 6-1 | | match details | ||
| 27.01.20 | c 2 | Ayumi Koshiishi | Jerricka Boone | 6-4, 6-4 | | match details | ||
| 26.01.20 | c 1 | Ayumi Koshiishi | Nina Ugrelidze | 6-1, 6-2 | | match details | ||
| 23.01.20 | c 2 | Ayumi Koshiishi | Haine Ogata | 6-1, 6-3 | | match details | W15 Manacor | Difícil |
| 23.01.20 | calif. | Ayumi Koshiishi | Kathleen Kanev | 6-4, 6-1 | | match details | ||
| 23.01.20 | 1er ronda | Celia Cervino Ruiz | Ayumi Koshiishi | 6-0, 7-65 | | match details | ||
| 22.01.20 | c 1 | Ayumi Koshiishi | Jillian Louise Roa | 6-2, 6-1 | | match details | ||
| 16.10.19 | 1er ronda | Sakura Hosogi | Ayumi Koshiishi | 4-0, Ayumi Koshiishi - retirado | | match details | W15 Hua | Difícil |
| 10.10.19 | 2da ronda | Patcharin Cheapchadej | Ayumi Koshiishi | 6-1, 6-3 | | match details | W15 Hua | Difícil |
| 09.10.19 | 1er ronda | Ayumi Koshiishi | Mananchaya Sawangkaew | 6-2, 6-3 | | match details | ||
| 19.08.19 | c 1 | Yui Chikaraishi | Ayumi Koshiishi | 2-6, 6-2, 10-7 | | match details | W25 Tsukuba | Difícil |
| 30.07.19 | calif. | Yidi Yang | Ayumi Koshiishi | 6-0, 6-2 | | match details | W25 Nonthaburi | Difícil |
| 29.07.19 | c 1 | Ayumi Koshiishi | Thasaporn Naklo | 6-3, 6-4 | | match details | ||
| 23.07.19 | calif. | Michika Ozeki | Ayumi Koshiishi | 6-2, 6-4 | | match details | W25 Nonthaburi | Difícil |
| 22.07.19 | c 1 | Ayumi Koshiishi | Ho Ching Wu | 6-3, 6-2 | | match details | ||
| 20.06.19 | 2da ronda | Sunam Jeong | Ayumi Koshiishi | 6-2, 7-60 | | match details | W15 Gimcheon | Difícil |
| 19.06.19 | 1er ronda | Ayumi Koshiishi | Honoka Kobayashi | 4-6, 6-4, 6-4 | | match details | ||
| 14.06.19 | 1/4 | Misaki Matsuda | Ayumi Koshiishi | 7-5, 6-74, 6-3 | | match details | W15 Gimcheon | Difícil |
| 13.06.19 | 2da ronda | Ayumi Koshiishi | Shou Na Mu | 7-5, 6-3 | | match details | ||
| 12.06.19 | 1er ronda | Ayumi Koshiishi | Dayeon Back | 7-5, 6-2 | | match details | ||
| 05.06.19 | calif. | Ayumi Koshiishi | So-Ra Lee | 7-5, 6-2 | | match details | W25 Daegu | Difícil |
| 04.06.19 | 1er ronda | Na-Lae Han | Ayumi Koshiishi | 6-3, 4-1, Ayumi Koshiishi - retirado | | match details | ||
| 03.06.19 | c 1 | Ayumi Koshiishi | Yeong Won Jeong | 4-1, Yeong Won Jeong - retirado | | match details | ||
| 28.05.19 | 1er ronda | Jessica Ho | Ayumi Koshiishi | 6-3, 6-1 | | match details | W25 Luzhou | Difícil |
| 28.05.19 | calif. | Ayumi Koshiishi | Wanning Zhu | 6-0, 6-1 | | match details | ||
| 21.05.19 | calif. | Chang Liu | Ayumi Koshiishi | 6-3, 4-6, 10-8 | | match details | W25 Goyang | Difícil |
| 20.05.19 | c 1 | Ayumi Koshiishi | Hyeran Yun | 6-4, 6-3 | | match details | ||
| 14.05.19 | calif. | Dabin Oh | Ayumi Koshiishi | 3-6, 6-3, 10-5 | | match details | W25 Changwon | Difícil |
| 13.05.19 | c 1 | Ayumi Koshiishi | Si On Park | 6-0, 6-1 | | match details | ||
| 08.04.19 | c 1 | Mihika Yadav | Ayumi Koshiishi | 3-6, 6-2, 10-4 | | match details | W25 Hong | Difícil |
| 22.03.19 | 1/4 | Eudice Wong Chong | Ayumi Koshiishi | 6-2, 6-3 | | match details | W15 Xiamen | Difícil |
| 21.03.19 | 2da ronda | Ayumi Koshiishi | Qianhui Tang | 7-5, 6-74, 3-0, Qianhui Tang - retirado | | match details | ||
| 20.03.19 | 1er ronda | Ayumi Koshiishi | Ashmitha Easwaramurthi | 6-0, 6-1 | | match details | ||
| 28.10.18 | c 1 | Masa Jovanovic | Ayumi Koshiishi | 7-5, 4-6, 6-4 | | match details | Canberra | Difícil |
| 21.10.18 | c 1 | Marianna Zakarlyuk | Ayumi Koshiishi | 4-6, 6-0, 7-65 | | match details | Bendigo | Difícil |
| 20.08.18 | calif. | Nagi Hanatani | Ayumi Koshiishi | 6-2, 7-60 | | match details | Tsukuba | Difícil |
| 19.08.18 | c 1 | Ayumi Koshiishi | Ange Oby Kajuru | 6-1, 6-4 | | match details | ||
| 11.08.18 | c 1 | Punnin Kovapitukted | Ayumi Koshiishi | 6-2, 6-2 | | match details | Nonthaburi | Difícil |
| 06.08.18 | 1er ronda | Lou Brouleau | Ayumi Koshiishi | 6-1, 6-3 | | match details | Nonthaburi | Difícil |
| 05.08.18 | calif. | Ayumi Koshiishi | Michika Ozeki | 6-70, 7-5, 6-3 | | match details | ||
| 04.08.18 | c 1 | Ayumi Koshiishi | Jia Qi Ren | 6-1, 1-6, 6-2 | | match details | ||
| 26.07.18 | 2da ronda | Hua-Chen Lee | Ayumi Koshiishi | 6-3, 6-0 | | match details | .png){kind=small} Taipei | Difícil |
| 24.07.18 | 1er ronda | Ayumi Koshiishi | Ting-Pei Chang | 6-2, 6-1 | | match details | ||
| 13.07.18 | 1/2 | Sakura Hosogi | Ayumi Koshiishi | 3-6, 6-4, 6-3 | | match details | Hong Kong | Difícil |
| 12.07.18 | 1/4 | Ayumi Koshiishi | Zeel Desai | 7-5, 6-1 | | match details | ||
| 11.07.18 | 2da ronda | Ayumi Koshiishi | Prerna Bhambri | 6-2, 6-2 | | match details | ||
| 10.07.18 | 1er ronda | Ayumi Koshiishi | Haine Ogata | 6-1, 6-4 | | match details | ||
| 10.06.18 | calif. | Deria Nur Haliza | Ayumi Koshiishi | 1-6, 6-4, 6-3 | | match details |  Singapore | Difícil |
| 09.06.18 | c 1 | Ayumi Koshiishi | Greeshma Sai Vignatha Kamisetty | 6-0, 6-0 | | match details | ||
| 04.06.18 | 1er ronda | Hiroko Kuwata | Ayumi Koshiishi | 7-63, 6-710, 6-4 | | match details | Singapore | Difícil |
| 03.06.18 | calif. | Ayumi Koshiishi | Khee Yen Wee | 6-3, 6-1 | | match details | ||
| 02.06.18 | c 1 | Ayumi Koshiishi | Sarah Pang | 6-0, 6-0 | | match details | ||
| 24.05.18 | 2da ronda | Ya-Hsuan Lee | Ayumi Koshiishi | 6-4, 6-3 | | match details | Changwon | Difícil |
| 23.05.18 | 1er ronda | Ayumi Koshiishi | Dabin Kim | 6-1, 6-3 | | match details | ||
| 22.05.18 | calif. | Ayumi Koshiishi | Chang Liu | 6-1, 6-3 | | match details | ||
| 21.05.18 | c 2 | Ayumi Koshiishi | Jeong Moon | 6-3, 6-2 | | match details | ||
| 20.05.18 | c 1 | Ayumi Koshiishi | Hyojin Kong | 6-3, 6-3 | | match details | ||
| 16.05.18 | 1er ronda | Na-Lae Han | Ayumi Koshiishi | 6-1, 6-73, 6-2 | | match details | Incheon | Difícil |
| 15.05.18 | calif. | Ayumi Koshiishi | Eunhye Lee | 6-3, 3-6, 6-1 | | match details | ||
| 14.05.18 | c 2 | Ayumi Koshiishi | Seo-Kyung Kang | 6-0, 6-2 | | match details | ||
| 13.05.18 | c 1 | Ayumi Koshiishi | Freya Christie | 6-4, 6-2 | | match details | ||
| 09.05.18 | 1er ronda | So-Ra Lee | Ayumi Koshiishi | 7-62, 6-3 | | match details | Goyang | Difícil |
| 08.05.18 | calif. | Ayumi Koshiishi | Yexin Ma | 6-4, 6-3 | | match details | ||
| 07.05.18 | c 2 | Ayumi Koshiishi | Jin Yoo | 6-3, 6-3 | | match details | ||
| 29.04.18 | c 1 | Ayumi Koshiishi | Yuka Asano | 6-3, 6-1 | | match details | Gifu | Difícil |
| 29.04.18 | c 2 | Tammi Patterson | Ayumi Koshiishi | 6-3, 3-0, Ayumi Koshiishi - retirado | | match details | ||
| 07.04.18 | c 1 | Akiko Omae | Ayumi Koshiishi | 6-3, 6-2 | | match details | Osaka | Difícil |
| 25.03.18 | c 2 | Ksenia Lykina | Ayumi Koshiishi | 7-5, 6-75, 6-3 | | match details | Kofu | Difícil |
| 24.03.18 | c 1 | Ayumi Koshiishi | Haruna Arakawa | 7-5, 6-4 | | match details | ||
| 17.03.18 | c 1 | Kei Kato | Ayumi Koshiishi | 7-5, 6-4 | | match details | Nishi Tama | Difícil |
| 10.03.18 | c 1 | Ji-Hee Choi | Ayumi Koshiishi | 4-6, 6-3, 6-2 | | match details | Toyota | Difícil |
| 01.01.18 | 1er ronda | Risa Ushijima | Ayumi Koshiishi | 6-1, 3-6, 7-5 | | match details | Hong Kong | Difícil |
| 31.12.17 | calif. | Ayumi Koshiishi | Pinyi Zuo | 6-1, 6-0 | | match details | ||
| 30.12.17 | c 1 | Ayumi Koshiishi | Ashmitha Easwaramurthi | 6-0, 6-2 | | match details | ||
| 27.12.17 | 2da ronda | Ling Zhang | Ayumi Koshiishi | 6-4, 6-3 | | match details | Hong Kong | Difícil |
| 25.12.17 | 1er ronda | Ayumi Koshiishi | Yuqi Sheng | 7-68, 6-2 | | match details | ||
| 24.12.17 | calif. | Ayumi Koshiishi | Dariya Detkovskaya | 7-5, 6-2 | | match details | ||
| 23.12.17 | c 1 | Ayumi Koshiishi | Angela Wingshan Sou | 6-0, 6-0 | | match details | ||
| 06.11.17 | c 1 | Ayumi Koshiishi | Mitsumi Kawasaki | 6-4, 5-7, 6-4 | | match details | Tokyo | Difícil |
| 06.11.17 | c 2 | Naomi Cheong | Ayumi Koshiishi | 7-65, 6-1 | | match details | ||
| 21.08.17 | c 1 | Aiko Yoshitomi | Ayumi Koshiishi | 7-5, 4-6, 6-3 | | match details | Tsukuba | Difícil |
| 22.03.17 | 1er ronda | Risa Ushijima | Ayumi Koshiishi | 6-1, 6-1 | | match details | Nishi Tama | Difícil |
| 20.03.17 | calif. | Ayumi Koshiishi | Eri Shimizu | 6-3, 7-5 | | match details | ||
| 20.03.17 | c 1 | Ayumi Koshiishi | Nina Stadler | 0-6, 7-66, 6-3 | | match details | ||
| 20.03.17 | c 2 | Ayumi Koshiishi | Robu Kajitani | 1-6, 6-0, 6-3 | | match details | ||
| 06.03.17 | c 1 | Haruka Kaji | Ayumi Koshiishi | 4-6, 6-1, 6-4 | | match details | Yokohama | Difícil |
| 26.09.16 | c 1 | Ayumi Koshiishi | Megumi Nishimoto | 6-3, 6-4 | | match details | Iizuka | Difícil |
| 26.09.16 | calif. | Akari Inoue | Ayumi Koshiishi | 7-64, 7-5 | | match details | ||
| 22.08.16 | c 1 | Nudnida Luangnam | Ayumi Koshiishi | 6-2, 6-1 | | match details | Tsukuba | Difícil |
| 21.03.16 | c 1 | Ayumi Mori | Ayumi Koshiishi | 2-6, 7-66, 6-0 | | match details | Nishi Tama | Difícil |