Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| Kashiwa, Doubles W-WITF-JPN-03A | 2018/04/07 02:55 | Okamura K / Okuno A v Han N-L / Kajitani R | 6-2,6-2 |
| Kashiwa, Doubles W-WITF-JPN-03A | 2018/04/06 05:10 | Hayashi E / Kobori M v Okamura K / Okuno A | 6-2,2-6,7-10 |
| Kashiwa, Doubles W-WITF-JPN-03A | 2018/04/05 04:50 | Okamura K / Okuno A v Silich A / Thandi K K | 6-4,6-7,10-1 |
| Kashiwa, Doubles W-WITF-JPN-03A | 2018/04/04 06:50 | Omae A / Plipuech P v Okamura K / Okuno A | 2-6,5-7 |
| Kofu, Doubles W-WITF-JPN-02A | 2018/03/29 05:20 | Okamura K / Okuno A v Kajitani R / Nishimoto M | 3-6,6-3,7-10 |
| Kofu, Doubles W-WITF-JPN-02A | 2018/03/28 04:25 | Kang J-Q / Minokoshi M v Okamura K / Okuno A | 2-6,4-6 |
| ITF Women Toyota WD | 2018/03/15 05:35 | Namigata J / Sema E v Okamura K / Okuno A | 6-4,6-7,10-8 |
| ITF Women Toyota WD | 2018/03/13 03:15 | Okamura K / Okuno A v Furuya M / Sano Y | 6-0,6-4 |