Round: 44 Ground: Hardcourt outdoor
| ITF Japan F1 | 2018/03/09 02:00 | Takuto Niki v Soichiro Moritani | 6-1,6-4 |
| ITF Japan F1 | 2018/03/08 05:35 | Shinji Hazawa v Soichiro Moritani | 6-7,2-6 |
| ITF Japan F1 | 2018/03/07 06:00 | Soichiro Moritani v Brydan Klein | 7-6,7-5 |
| ITF Hong Kong F6 | 2018/01/01 02:00 | Soichiro Moritani v Emil Ruusuvuori | 0-6,4-6 |
| ITF Hong Kong F5 | 2017/12/24 03:00 | Soichiro Moritani v Masaya Kobayashi | 2-6,2-6 |
| ITF Hong Kong F5 | 2017/12/23 05:00 | Soichiro Moritani v Ching Lam | 6-1,6-4 |
| ITF Indonesia F8 | 2017/11/29 08:00 | Soichiro Moritani v Andrew Harris | 2-6,3-6 |
| ITF Indonesia F8 | 2017/11/28 03:30 | Soichiro Moritani v Justin Barki | 7-6,6-4 |
| ITF Japan F1 | 2018/03/06 01:00 | Naru Shirafuji v Masaki Osafune | 6-0,6-3 |
| ITF Japan F1 | 2018/03/03 04:30 | Cheong Hwi Kim v Masaki Osafune | 1-6,1-6 |
| Challenger Kyoto Qual | 2018/02/18 06:05 | Masaki Osafune v Takuto Niki | 3-6,2-6 |
| Challenger Toyota Qual | 2017/11/11 02:15 | Yuto Sakai v Masaki Osafune | 7-6,1-6,6-1 |
| ITF Guam F1 | 2017/06/22 03:25 | Masaki Osafune v Yuichi Ito | 2-6,4-6 |
| ITF Guam F1 | 2017/06/20 06:00 | Masaki Osafune v Steven Goh | 6-3,6-4 |
| ITF Japan F7 | 2017/06/06 04:05 | Renta Tokuda v Masaki Osafune | 6-1,3-6,6-1 |
| ITF Japan F7 | 2017/06/04 01:00 | Masaki Osafune v Shoma Kato | 6-3,6-3 |