Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| Kofu, Singles W-WITF-JPN-02A | 2018/06/12 02:40 | Luangnam, Nudnida v Haruna Arakawa | 4-6,0-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/06/06 08:55 | Haruna Arakawa v Zhuravleva, Angelina | 6-4,4-6,2-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/31 07:30 | Verena Meliss v Haruna Arakawa | 6-1,3-6,6-3 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/29 09:50 | Ilay Yoruk v Haruna Arakawa | 1-6,5-7 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/24 07:30 | Haruna Arakawa v Valeriya Yushchenko | 2-6,6-1,1-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/23 07:30 | Haruna Arakawa v Milkova, Barbora | 6-1,3-6,6-4 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/09 07:30 | Nazarkina, Daria v Haruna Arakawa | 6-7,6-3,6-4 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/06 08:00 | Haruna Arakawa v Maria F Herazo Gonzalez | 4-6,1-6 |
| Kofu, Singles W-WITF-JPN-02A | 2018/06/13 03:30 | Mana Ayukawa v Momoko Kobori | 4-6,4-6 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/27 02:00 | Inoue, Miyabi v Momoko Kobori | 0-6,2-6 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/26 02:00 | Momoko Kobori v Tammi Patterson | 5-7,6-4,6-4 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/25 01:00 | Kanako Morisaki v Momoko Kobori | 2-6,6-7 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/24 04:45 | Caroline Werner v Momoko Kobori | 2-6,4-6 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/22 01:00 | Miyachi, Ran v Momoko Kobori | 2-6,0-6 |
| ITF Women Kurume | 2018/05/15 04:05 | Eguchi, Misa 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 |