Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF Women Jakarta | 2018/07/16 03:00 | Chihiro Takayama v Rhiannon McBlane | 6-4,6-1 |
| ITF Women Hong Kong | 2018/07/10 03:50 | Chihiro Takayama v Ashmitha Easwaramurthi | 2-6,5-7 |
| ITF Women Daegu Qual | 2018/06/18 03:25 | Hyojung Yea v Chihiro Takayama | 6-3,6-0 |
| ITF Women Gyeongsan Qual | 2018/06/11 02:00 | Chihiro Takayama v Ah Song | 2-6,4-6 |
| ITF Women Sangju Qual | 2018/06/04 03:30 | Chihiro Takayama v Hyojung Yea | 2-6,1-6 |
| ITF Women Karuizawa Qual | 2018/05/21 02:55 | Yukina Saigo v Chihiro Takayama | 6-1,6-1 |
| ITF Women Kurume Qual | 2018/05/14 02:30 | Ari Matsumoto v Chihiro Takayama | 1-6,6-3,6-2 |
| ITF Women Kurume Qual | 2018/05/13 09:35 | Chihiro Takayama v Tori Kinard | 2-6,7-5,6-3 |
| ITF Women Solo | 2018/07/11 02:30 | Suzuho Oshino v Ayaka Okuno | 6-7,4-6 |
| ITF Women Solo | 2018/07/10 07:05 | Anastasia Shaulskaya v Suzuho Oshino | 5-7,1-6 |
| ITF Women Kofu | 2018/06/12 02:25 | Mai Hontama v Suzuho Oshino | 6-3,6-2 |
| ITF Women Karuizawa Qual | 2018/05/20 02:30 | Mana Kawamura v Suzuho Oshino | 6-2,6-2 |
| ITF Women Kurume | 2018/05/17 01:00 | Naomi Broady v Suzuho Oshino | 6-1,6-4 |
| ITF Women Osaka Qual | 2018/04/08 02:00 | Chihiro Muramatsu v Suzuho Oshino | 6-1,6-1 |
| ITF Women Kofu Qual | 2018/03/24 00:30 | Mei Yamaguchi v Suzuho Oshino | 6-1,7-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Rika Fujiwara v Suzuho Oshino | 7-5,6-0 |