Stadium: Court 8 Round: 54 Ground: Synthetic outdoor
| ITF Japan F7 Qual | 2018/06/02 01:00 | Masaki Sasai v Takuya Kureoka | 6-2,6-3 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | Hajime Nakashima v Masaki Sasai | 6-2,6-1 |
| ITF Japan F5 | 2018/04/02 03:40 | Masaki Sasai v Yusuke Takahashi | 6-3,3-6,3-6 |
| ITF Japan F5 | 2018/04/01 00:30 | Ken Onoda v Masaki Sasai | 3-6,1-6 |
| ITF Japan F4 | 2018/03/25 01:00 | Soichiro Moritani v Masaki Sasai | 6-4,6-3 |
| ITF Japan F4 | 2018/03/24 00:00 | Takuya Kumasaka v Masaki Sasai | 3-6,6-4,3-6 |
| ITF Japan F3 | 2018/03/18 01:30 | Issei Okamura v Masaki Sasai | 6-3,6-1 |
| ITF Japan F3 | 2018/03/17 04:00 | Ryohei Tagata v Masaki Sasai | 5-7,6-3,2-6 |
| ITF Japan F1 | 2018/03/04 01:00 | Shoji Sato v Itsuki Matsumoto | 4-6,4-6 |
| ITF Japan F2 | 2017/03/12 01:00 | Shoji Sato v Shunrou Takeshima | 3-6,4-6 |