| ITF W25 Makinohara | 10/08 03:00 | 54 | Ari Matsumoto v Kotomi Takahata | 6-2,6-3 | |
| ITF W25 Nanao | 08/29 02:00 | 25 | Mana Ayukawa v Kotomi Takahata | 2-6,6-3,6-1 | |
| ITF W25 Nanao | 08/26 01:00 | 44 | Sakura Hondo v Kotomi Takahata | 6-4,2-6,7-10 | |
| ITF W25 Nanao | 08/25 03:00 | 44 | Yu-Ting Hsieh v Kotomi Takahata | 2-6,3-6 | |
| ITF W25 Tsukuba | 08/21 01:30 | 25 | Momoko Kobori v Kotomi Takahata | 6-3,6-1 | |
| ITF W25 Tsukuba | 08/20 04:30 | 54 | Mako Ganaha v Kotomi Takahata | 6-1,1-6,7-10 | |
| ITF W25 Tsukuba | 08/19 02:35 | 54 | Kotomi Takahata v Funa Kozaki | 6-1,6-2 | |
| ITF W25 Incheon | 05/27 02:50 | 54 | Kotomi Takahata v Hwui Won WI | Retired | |
| ITF W25 Goyang | 05/21 01:00 | 54 | [443] Yuuki Tanaka v Kotomi Takahata [458] | 6-0,6-0 | |
| ITF W25 Goyang | 05/20 01:00 | 54 | Anna Laguza v Kotomi Takahata | 6-7,6-2,5-10 | |
| ITF W25 Changwon | 05/15 01:00 | 25 | [453] Alicia Barnett v Kotomi Takahata [460] | 6-0,6-3 | |
| ITF W25 Changwon | 05/14 01:00 | 54 | Kotomi Takahata v Anna Laguza | 6-4,6-4 | |
| ITF W25 Changwon | 05/13 01:00 | 54 | Kotomi Takahata v Sandeul Kim | 6-2,6-1 | |
| ITF W60 Luan | 05/06 02:00 | 54 | [447] Anastasia E Nefedova v Kotomi Takahata [430] | 6-1,6-3 | |
| ITF W25 Osaka | 04/09 02:40 | 25 | Risa Ushijima v Kotomi Takahata | 6-3,6-2 | |
| ITF W25 Jackson | 04/01 16:00 | 54 | Kotomi Takahata v Mara Schmidt | 3-6,4-6 | |
| ITF W15 Antalya | 01/27 14:30 | 26 | Julia Stamatova v Kotomi Takahata | Cancelled | |
| ITF W15 Antalya | 01/25 09:00 | 25 | Darya Lavrichenko v Kotomi Takahata | 6-3,1-6,9-11 | |
| ITF Women Makinohara | 10/08 03:25 | 54 | Kotomi Takahata v Suzuho Oshino | 4-6,2-6 | |
| ITF Women Makinohara | 10/07 03:00 | 54 | Kotomi Takahata v Robu Kajitani | 7-5,7-5 | |
| ITF Women Kyoto | 09/04 08:40 | 25 | Chihiro Takayama v Kotomi Takahata | Cancelled | |
| ITF Women Nanao | 08/29 05:20 | 25 | [348] Kotomi Takahata v Haruka Kaji [342] | 6-7,2-6 | |
| ITF Women Nanao | 08/27 01:00 | 62 | Kotomi Takahata v Minami Shuto | 7-6,6-3 | |
| ITF Women Nanao | 08/26 03:25 | 62 | Kotomi Takahata v Ayano Sonoda | 6-4,6-0 | |
| ITF Women Tsukuba | 08/19 03:00 | 54 | Kumi So v Kotomi Takahata | 6-4,6-4 | |
| ITF Women Taipei | 07/24 03:55 | 25 | [457] Chin-Wei Chan v Kotomi Takahata [292] | 4-6,6-3,6-3 | |
| ITF Women Astana Qual | 07/14 10:45 | 54 | Daria Kruzhkova v Kotomi Takahata | 6-2,6-1 | |
| ITF Women Tianjin Qual | 07/09 02:00 | 62 | Kotomi Takahata v Mei Xu Wu | 3-6,6-2,2-6 | |
| ITF Women Tianjin Qual | 07/08 06:35 | 62 | Kotomi Takahata v Qian Yang | 6-0,6-2 | |
| ITF Women Daegu | 06/21 01:00 | 26 | [196] Su Jeong Jang v Kotomi Takahata [286] | 6-3,7-5 |