Round: 28 Ground: Hardcourt outdoor
| ITF Japan F4 MD | 2018/03/29 05:50 | X Gao / A Wang v Ehara H / Hazawa S | 3-6,2-6 |
| ITF Japan F4 MD | 2018/03/27 03:55 | Imamura M / Itsusaki K v Ehara H / Hazawa S | 3-6,6-7 |
| ITF Japan F4 MD | 2018/03/29 07:20 | Te, Rigele / Wang, Chuhan v Nakagawa N / Uesugi K | 2-6,1-6 |
| ITF Japan F4 MD | 2018/03/28 05:55 | Ochi M / Tanuma R v Nakagawa N / Uesugi K | 6-7,4-6 |