Stadium: Court A Round: 25 Ground: Hardcourt outdoor
| 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 |
| ITF Women Denain | 2018/07/04 11:35 | Chihiro Muramatsu v Valeriya Strakhova | 1-6,4-6 |
| ITF Women Denain Qual | 2018/07/02 08:00 | Chihiro Muramatsu v Anna Danilina | 4-6,2-6 |
| ITF Women Denain Qual | 2018/07/01 14:30 | Chihiro Muramatsu v Maneva Rakotomalala | 6-2,6-3 |
| ITF Women Perigueux | 2018/06/26 09:15 | Moyuka Uchijima v Chihiro Muramatsu | 3-6,6-1,6-2 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/22 01:00 | Chihiro Muramatsu v Shiho Akita | 6-2,6-4 |
| ITF Women Kurume | 2018/05/15 05:05 | Jorovic, Ivana v Chihiro Muramatsu | 6-3,6-3 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/12 02:00 | Hsu, Ching Wen v Mana Ayukawa | 2-6,5-7 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/08/11 04:25 | Natcharee Teerachodjiranon v Mana Ayukawa | 0-6,3-6 |
| ITF Women Jinan | 2018/08/06 03:25 | Cao, Siqi v Mana Ayukawa | 7-5,6-3 |
| ITF Women Jinan | 2018/08/05 07:30 | Mana Ayukawa v Ng, Kwan Yau | 2-6,7-5,6-1 |
| ITF Women Jakarta | 2018/07/19 05:05 | Mana Ayukawa v Ho Ching Wu | 6-2,3-6,4-6 |
| ITF Women Jakarta | 2018/07/18 04:30 | Li, Jiakang v Mana Ayukawa | 4-6,2-6 |
| ITF Women Solo | 2018/07/13 02:00 | Mana Ayukawa v Du, Zhima | 3-6,4-6 |
| ITF Women Solo | 2018/07/12 03:00 | Mana Ayukawa v Okuno, Ayaka | 6-0,4-6,6-3 |