Round: 62 Ground: Clay
| ITF - Japan F4 | 2015/03/28 03:00 | Masaki Sasai v Masayoshi Ono | 6-4,6-1 |
| ITF - Japan F8 | 2018/06/09 01:00 | Masaki Sasai v Yusei Fukuoka | 6-0,6-1 |
| ITF - Japan F7 - Qualifikation | 2018/06/03 01:00 | Masaki Sasai v Shoji Sato | 6-1,7-5 |
| ITF - Japan F7 - Qualifikation | 2018/06/02 01:00 | Masaki Sasai v Takuya Kureoka | 6-2,6-3 |
| ITF - Japan F6 - Qualifikation | 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 F8 | 2018/06/09 01:00 | Yasunori Hashikawa v Masayoshi Ono | 6-2,4-6,4-6 |
| ITF - Japan F7 - Qualifikation | 2018/06/03 01:00 | Yuichiro Inui v Masayoshi Ono | 7-5,6-2 |
| ITF - Tschechien F1 | 2018/05/12 09:00 | Adam Blecha v Masayoshi Ono | 6-3,6-2 |
| ITF - Schweden F1 - Qualifikation | 2018/05/05 08:00 | Masayoshi Ono v Simon Yitbarek | 2-6,6-4,4-6 |
| ITF - Japan F6 - Qualifikation | 2018/04/09 02:45 | Aoran Wang v Masayoshi Ono | 3-6,6-2,6-2 |
| ITF - Japan F6 - Qualifikation | 2018/04/08 04:00 | Masayoshi Ono v Ken Onoda | 6-2,6-4 |
| ITF - Griechenland F4 | 2018/03/18 09:30 | Maksim Tikhomirov v Masayoshi Ono | 7-6,6-2 |
| ITF - Griechenland F4 | 2018/03/17 07:30 | Masayoshi Ono v Leevi Saatela | 6-1,6-0 |