Stadium: Court 3 Round: 54
| ITF Women Kurume Qual | 2018/05/13 00:30 | Chisa Hosonuma v Naoko Eto | 6-0,6-0 |
| ITF Women Fukuoka Qual | 2018/05/07 03:05 | Rika Fujiwara v Chisa Hosonuma | 7-5,6-4 |
| ITF Women Fukuoka Qual | 2018/05/06 05:25 | Chisa Hosonuma v Mihoki Miyahara | 6-1,7-6 |
| ITF Women Hammamet | 2018/04/18 10:25 | Chisa Hosonuma v Clothilde De Bernardi | 7-6,3-6,1-6 |
| ITF Women Tunis Qual | 2018/04/08 08:30 | Anna Bondar v Chisa Hosonuma | 6-2,6-2 |
| ITF Women Tunis Qual | 2018/04/07 11:00 | Nour Damergi v Chisa Hosonuma | 0-6,0-6 |
| ITF Women Nishi-Tama | 2018/03/21 08:20 | Chisa Hosonuma v Giulia Gatto Monticone | 1-6,0-6 |
| ITF Women Nishi-Tama | 2018/03/19 01:00 | Mitsumi Kawasaki v Chisa Hosonuma | 6-1,4-6,2-6 |
| ITF Women Kurume Qual | 2018/05/13 00:30 | Akari Inoue v Michika Ozeki | 2-6,6-1,4-6 |
| ITF Women Fukuoka Qual | 2018/05/06 02:40 | Olivia Tjandramulia v Michika Ozeki | 6-2,7-6 |
| WTA Anning Qual | 2018/04/28 06:30 | Xu Liu Sun v Michika Ozeki | 7-6,7-6 |
| ITF Women Quanzhou Qual | 2018/04/21 08:05 | Ying Zhang v Michika Ozeki | 3-6,6-3,6-1 |
| ITF Women Canberra | 2018/03/28 23:00 | Katy Dunne v Michika Ozeki | 6-3,6-0 |
| ITF Women Canberra | 2018/03/27 00:50 | Michika Ozeki v Ramona Mataruga | 6-4,6-1 |
| ITF Women Canberra Qual | 2018/03/25 01:30 | Michika Ozeki v Binasa Beslagic | 6-2,3-6,6-3 |
| ITF Women Canberra Qual | 2018/03/24 02:30 | Michika Ozeki v Elyse Edwards | 6-4,6-4 |