Stadium: I Round: 45 Ground: Hardcourt outdoor
| Vancouver, Singles W-WITF-CAN-01A | 2018/08/13 17:00 | Ozaki, Risa v Martina Trevisan | 3-6,3-6 |
| Vancouver, Singles W-WITF-CAN-01A | 2018/08/12 19:10 | Ozaki, Risa v Emily Webley-Smith | 6-1,6-2 |
| ITF Women Landisville | 2018/08/08 15:35 | Anastasia Potapova v Ozaki, Risa | 2-6,6-4,6-0 |
| ITF Women Landisville Qual | 2018/08/07 14:00 | Stewart, Katerina v Ozaki, Risa | 1-6,2-6 |
| ITF Women Landisville Qual | 2018/08/06 14:00 | Dzalamidze, Natela v Ozaki, Risa | 1-6,4-6 |
| ITF Women Landisville Qual | 2018/08/05 14:00 | Ashley Lahey v Ozaki, Risa | 6-2,1-6,1-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/14 02:00 | Ozaki, Risa v Ankita Raina | 2-6,3-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/13 02:00 | Peangtarn Plipuech v Ozaki, Risa | 5-7,2-6 |
| ITF Women Nanao | 2018/08/30 03:00 | Chihiro Muramatsu v Haruka Kaji | 1-6,2-6 |
| ITF Women Nanao | 2018/08/28 03:00 | Ueda, Ramu v Chihiro Muramatsu | 2-6,5-7 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/24 01:00 | Chihiro Muramatsu v Momoko Kobori | 2-6,3-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/23 00:30 | Hiroko Kuwata v Chihiro Muramatsu | 6-7,2-6 |
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/22 00:30 | Chihiro Muramatsu v Michika Ozeki | 6-1,6-2 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/13 02:00 | Chihiro Muramatsu v Mana Ayukawa | 5-7,5-7 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/07 02:00 | Chihiro Muramatsu v Dabin Kim | 1-6,1-6 |
| ITF Women Contrexeville Qual | 2018/07/08 08:00 | Yerolymos, Margot v Chihiro Muramatsu | 6-3,7-5 |