| WTA Osaka | 09/14 03:35 | 45 | [277] Momoko Kobori v Kurumi Nara [182] | 3-6,2-6 | |
| WTA Zhengzhou | 09/07 05:10 | 45 | [273] Momoko Kobori v Natalija Kostic [216] | 2-6,4-6 | |
| WTA New Haven | 09/03 14:00 | 24 | [377] Quinn Gleason v Momoko Kobori [273] | 7-5,6-4 | |
| ITF W25 Nanao | 08/29 02:00 | 26 | [323] Miyabi Inoue v Momoko Kobori [273] | 6-7,6-2,6-0 | |
| ITF W25 Nanao | 08/27 02:40 | 25 | Shiho Akita v Momoko Kobori | 3-6,6-4,3-6 | |
| ITF W25 Tsukuba | 08/24 02:45 | 28 | [273] Momoko Kobori v Haruka Kaji [362] | 6-0,6-7,2-6 | |
| ITF W25 Tsukuba | 08/23 04:15 | 27 | [273] Momoko Kobori v Mai Hontama [364] | 6-2,6-2 | |
| ITF W25 Tsukuba | 08/22 02:20 | 26 | [273] Momoko Kobori v Erina Hayashi [435] | 7-6,7-5 | |
| ITF W25 Tsukuba | 08/21 01:30 | 25 | Momoko Kobori v Kotomi Takahata | 6-3,6-1 | |
| ITF W80 Granby | 07/27 14:00 | 29 | Carson Branstine v Momoko Kobori | Cancelled | |
| ITF W80 Granby | 07/24 18:45 | 25 | [272] Mayo Hibi v Momoko Kobori [253] | 6-2,6-4 | |
| ITF W25 Gatineau | 07/17 17:40 | 25 | [259] Momoko Kobori v Marcela Zacarias [455] | 5-7,2-6 | |
| ITF W25 Saskatoon | 07/11 16:00 | 26 | [254] Momoko Kobori v Hanna Chang [438] | 3-6,3-6 | |
| ITF W25 Saskatoon | 07/09 17:30 | 25 | Momoko Kobori v Isabelle Boulais | 7-6,1-6,6-4 | |
| ITF W25 Jakarta | 06/22 03:00 | 28 | Arianne Hartono v Momoko Kobori | 6-3,6-1 | |
| ITF W25 Jakarta | 06/21 02:00 | 27 | [293] Miharu Imanishi v Momoko Kobori [264] | 6-1,5-7,0-6 | |
| ITF W25 Jakarta | 06/20 03:00 | 26 | Michika Ozeki v Momoko Kobori | 4-6,2-6 | |
| ITF W25 Jakarta | 06/19 04:00 | 25 | [444] Olivia Tjandramulia v Momoko Kobori [264] | 2-6,4-6 | |
| ITF W25 Hengyang | 06/12 03:55 | 25 | Ziyue Sun v Momoko Kobori | 7-5,6-1 | |
| ITF W25 Hongkong | 06/01 02:00 | 27 | [407] Erina Hayashi v Momoko Kobori [254] | 7-5,6-2 | |
| ITF W25 Hongkong | 05/31 04:30 | 26 | [450] Anastasia E Nefedova v Momoko Kobori [254] | 3-6,1-6 | |
| ITF W25 Hongkong | 05/30 02:00 | 25 | Nastja Kolar v Momoko Kobori | 1-6,1-6 | |
| ITF W25 Karuizawa | 05/26 02:00 | 29 | [254] Momoko Kobori v Jovana Jaksic [275] | 1-6,6-4,5-7 | |
| ITF W25 Karuizawa | 05/25 01:00 | 28 | [251] Momoko Kobori v Erina Hayashi [412] | 6-4,6-3 | |
| ITF W25 Karuizawa | 05/24 01:00 | 27 | [251] Momoko Kobori v Mai Hontama [355] | 6-4,1-6,7-5 | |
| ITF W25 Karuizawa | 05/23 01:00 | 26 | [251] Momoko Kobori v Mana Ayukawa [401] | Retired | |
| ITF W25 Karuizawa | 05/22 02:30 | 25 | [251] Momoko Kobori v Ena Shibahara [473] | 3-6,7-5,6-3 | |
| ITF W60 Kurume | 05/15 03:25 | 25 | Naho Sato v Momoko Kobori | 6-2,6-1 | |
| ITF W60 Fukuoka | 05/09 03:20 | 26 | [237] Momoko Kobori v Emina Bektas [378] | 6-7,1-6 | |
| ITF W60 Fukuoka | 05/07 01:00 | 25 | [237] Momoko Kobori v Kaylah McPhee [239] | 6-4,3-6,6-3 |