Stadium: Indoor 6 Round: 26 Ground: Hardcourt outdoor
| ITF Thailand F8 Qual | 2017/10/09 03:20 | Shinji Hazawa v Soichiro Moritani | 6-4,6-1 |
| ITF Japan F1 | 2018/03/07 04:45 | Issei Okamura v Shinji Hazawa | 6-3,1-6,3-6 |
| ITF Japan F1 | 2018/03/05 01:00 | Shinji Hazawa v Masamichi Imamura | 4-6,7-5,6-4 |
| Challenger Yokohama | 2018/03/01 02:00 | Yasutaka Uchiyama v Shinji Hazawa | 6-3,7-5 |
| Challenger Yokohama | 2018/02/27 01:00 | Shinji Hazawa v Soonwoo Kwon | 6-3,4-6,7-6 |
| ITF China F1 | 2018/01/13 04:25 | Huixin Wang v Shinji Hazawa | 3-6,6-0,6-2 |
| ITF China F1 | 2018/01/11 02:30 | Seong-Gook Oh v Shinji Hazawa | 3-6,4-6 |
| ITF China F1 | 2018/01/09 05:15 | Zihao Xia v Shinji Hazawa | 4-6,3-6 |
| Challenger Kobe Qual | 2017/11/04 02:00 | Max Purcell v Shinji Hazawa | 7-6,6-2 |
| 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 Indonesia F7 | 2017/11/20 03:30 | Soichiro Moritani v Ti Chen | 3-6,5-7 |
| ITF Thailand F8 Qual | 2017/10/09 03:20 | Shinji Hazawa v Soichiro Moritani | 6-4,6-1 |