Stadium: Court 1 Round: 29 Ground: Hardcourt outdoor
| ITF Women Kashiwa WD | 2018/04/06 05:10 | Hayashi/Kobori v Okamura/Okuno | 6-2,2-6,7-10 |
| ITF Women Kashiwa WD | 2018/04/05 04:50 | Okamura/Okuno v Silich/Thandi | 6-4,6-7,10-1 |
| ITF Women Kashiwa WD | 2018/04/04 06:50 | Omae/Plipuech v Okamura/Okuno | 2-6,5-7 |
| ITF Women Kofu WD | 2018/03/29 05:20 | Okamura/Okuno v Kajitani/Nishimoto | 3-6,6-3,7-10 |
| ITF Women Kofu WD | 2018/03/28 04:25 | Kang/Minokoshi v Okamura/Okuno | 2-6,4-6 |
| ITF Women Toyota WD | 2018/03/15 05:35 | Namigata/Sema v Okamura/Okuno | 6-4,6-7,10-8 |
| ITF Women Toyota WD | 2018/03/13 03:15 | Okamura/Okuno v Furuya/Sano | 6-0,6-4 |
| ITF Women Yokohama WD | 2018/03/08 10:15 | Okamura/Okuno v Kaji/Shimizu | 4-6,1-6 |
| ITF Women Kashiwa WD | 2018/04/06 04:20 | Han/Kajitani v Han/Zhang | 6-1,7-6 |
| ITF Women Kashiwa WD | 2018/04/05 04:55 | Gumulya/Kumkhum v Han/Kajitani | 6-7,2-6 |
| ITF Women Kashiwa WD | 2018/04/03 05:35 | Han/Kajitani v Fujiwara/Takahata | 7-5,4-6,10-6 |