Stadium: Court 5 Round: 44 Ground: Hardcourt outdoor
| ITF Japan F1 | 2018/03/08 05:35 | Shinji Hazawa v Soichiro Moritani | 6-7,2-6 |
| 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 |
| ITF Japan F3 | 2018/03/17 00:30 | Yasunori Hashikawa v Naoya Maesaki | 4-6,4-6 |
| ITF Japan F1 | 2018/03/07 04:45 | Takuto Niki v Naoya Maesaki | 6-2,6-7,6-2 |
| ITF Japan F1 | 2018/03/05 01:00 | Sota Fujii v Naoya Maesaki | 6-3,4-6,4-6 |
| ITF Japan F1 | 2018/03/04 01:00 | Naoya Maesaki v Yuga Tashiro | 6-3,6-4 |
| ITF Japan F8 | 2017/06/10 05:00 | Luca Castelnuovo v Naoya Maesaki | 6-3,6-4 |
| ITF Japan F3 | 2017/03/19 01:00 | Chan-Yeong Oh v Naoya Maesaki | 6-2,6-4 |
| ITF Japan F3 | 2017/03/18 05:30 | Naoya Maesaki v Shunrou Takeshima | 0-6,6-1,6-1 |