Stadium: Court 2 Round: 25
| ITF Japan F3 | 2018/03/18 01:00 | Soichiro Moritani v Takashi Saito | 6-3,3-6,0-6 |
| ITF Vietnam F1 | 2018/05/04 03:00 | Lucas Vuradin v Takashi Saito | 7-5,6-4 |
| ITF Vietnam F1 | 2018/05/02 04:55 | Phuong Van Nguyen v Takashi Saito | 1-6,4-6 |
| ITF Vietnam F1 | 2018/05/01 03:00 | Rhett Purcell v Takashi Saito | 6-7,1-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Takashi Saito v Ken Onoda | 3-6,4-6 |
| ITF Japan F4 | 2018/03/24 02:00 | Masamichi Imamura v Takashi Saito | 6-4,6-4 |
| ITF Japan F3 | 2018/03/19 02:15 | Masaya Kobayashi v Takashi Saito | 6-4,4-6,6-4 |
| ITF Japan F3 | 2018/03/18 01:00 | Soichiro Moritani v Takashi Saito | 6-3,3-6,0-6 |
| ITF Japan F3 | 2018/03/17 04:00 | Kenta Kurita v Takashi Saito | 7-5,3-6,0-6 |
| ITF Vietnam F1 | 2018/04/30 03:00 | Soichiro Moritani v Jirat Navasirisomboon | 2-6,4-6 |
| ITF Japan F6 | 2018/04/10 02:25 | Hiroki Moriya v Soichiro Moritani | 6-4,7-5 |
| ITF Japan F5 | 2018/04/02 02:20 | Jumpei Yamasaki v Soichiro Moritani | 6-1,6-3 |
| ITF Japan F4 | 2018/03/26 01:00 | Soichiro Moritani v Shinta Fujii | 6-4,3-6,3-6 |
| ITF Japan F4 | 2018/03/25 01:00 | Soichiro Moritani v Masaki Sasai | 6-4,6-3 |
| ITF Japan F4 | 2018/03/24 02:00 | Soichiro Moritani v Itsuki Matsumoto | 6-2,6-3 |
| ITF Japan F3 | 2018/03/19 01:00 | Sho Katayama v Soichiro Moritani | 6-2,6-0 |
| ITF Japan F3 | 2018/03/18 01:00 | Soichiro Moritani v Takashi Saito | 6-3,3-6,0-6 |