Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF Women Kofu | 2018/06/12 02:40 | Nudnida Luangnam v Haruna Arakawa | 4-6,0-6 |
| ITF Women Antalya | 2018/06/06 08:55 | Haruna Arakawa v Angelina Zhuravleva | 6-4,4-6,2-6 |
| ITF Women Antalya | 2018/05/31 07:30 | Verena Meliss v Haruna Arakawa | 6-1,3-6,6-3 |
| ITF Women Antalya | 2018/05/29 09:50 | Ilay Yoruk v Haruna Arakawa | 1-6,5-7 |
| ITF Women Antalya | 2018/05/24 07:30 | Haruna Arakawa v Valeriya Yushchenko | 2-6,6-1,1-6 |
| ITF Women Antalya | 2018/05/23 07:30 | Haruna Arakawa v Barbora Miklova | 6-1,3-6,6-4 |
| ITF Women Antalya | 2018/05/09 07:30 | Daria Nazarkina v Haruna Arakawa | 6-7,6-3,6-4 |
| ITF Women Antalya | 2018/05/06 08:00 | Haruna Arakawa v Maria F Herazo Gonzalez | 4-6,1-6 |
| ITF Women Kofu | 2018/06/13 03:30 | Mana Ayukawa v Momoko Kobori | 4-6,4-6 |
| ITF Women Karuizawa | 2018/05/27 02:00 | Miyabi Inoue v Momoko Kobori | 0-6,2-6 |
| ITF Women Karuizawa | 2018/05/26 02:00 | Momoko Kobori v Tammi Patterson | 5-7,6-4,6-4 |
| ITF Women Karuizawa | 2018/05/25 01:00 | Kanako Morisaki v Momoko Kobori | 2-6,6-7 |
| ITF Women Karuizawa | 2018/05/24 04:45 | Caroline Werner v Momoko Kobori | 2-6,4-6 |
| ITF Women Karuizawa | 2018/05/22 01:00 | Ran Miyachi v Momoko Kobori | 2-6,0-6 |
| ITF Women Kurume | 2018/05/15 04:05 | Misa Eguchi v Momoko Kobori | 2-6,6-3,6-0 |
| ITF Women Fukuoka | 2018/05/12 04:20 | Katie Boulter v Momoko Kobori | 6-1,6-4 |