Stadium: Court A7 Round: 62 Ground: Synthetic outdoor
| Tsukuba, Singles W-WITF-JPN-09A | 2018/08/19 03:00 | So, Kumi v 타카하타, 코토미 | 6-4,6-4 |
| ITF Women Taipei | 2018/07/24 03:55 | Chan, Chin-Wei v 타카하타, 코토미 | 4-6,6-3,6-3 |
| ITF Women Astana Qual | 2018/07/14 10:45 | 크루즈코바, 다리아 v 타카하타, 코토미 | 6-2,6-1 |
| ITF Women Tianjin Qual | 2018/07/09 02:00 | 타카하타, 코토미 v 우, 메이쉬 | 3-6,6-2,2-6 |
| ITF Women Tianjin Qual | 2018/07/08 06:35 | 타카하타, 코토미 v 양, 치안 | 6-0,6-2 |
| ITF Women Daegu | 2018/06/21 01:00 | 장, 수 정 v 타카하타, 코토미 | 6-3,7-5 |
| ITF Women Daegu | 2018/06/20 05:45 | 타카하타, 코토미 v 코이케, 사트스키 | 6-4,7-5 |
| ITF Women Daegu Qual | 2018/06/19 01:00 | 타카하타, 코토미 v 홍, 성연 | 6-4,3-6,6-3 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/06/04 07:30 | Sonoda, Ayano v 케트라욱스, 마리에 | 1-6,1-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/30 09:10 | Sonoda, Ayano v 세저, 멜리스 | 0-6,2-6 |
| Antalya, Singles Qualifying W-WITF-TUR-46A | 2018/05/28 11:10 | Sonoda, Ayano v Belovukovic, Stephanie | 7-6,1-6,5-7 |
| ITF Women Kurume Qual | 2018/05/13 08:40 | Kawasaki, Mitsumi v Sonoda, Ayano | 6-1,6-1 |
| Nishi-Tama, Singles W-WITF-JPN-01A | 2018/03/17 01:00 | Sonoda, Ayano v 호소기, 사쿠라 | 4-6,4-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/01/27 06:30 | Sonoda, Ayano v 타카야마, 치히로 | 0-6,0-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/01/21 11:00 | Sonoda, Ayano v Altukhova, Polina | 2-6,4-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/01/15 08:00 | Sonoda, Ayano v Schippers, Daniela | 2-6,3-6 |