Round: 54 Ground: Synthetic outdoor
| ITF Japan F6 Qual | 2017/05/29 03:40 | Matsuo, Yuki v Osafune, Masaki | 7-6,6-2 |
| ITF China F7 | 2017/05/17 03:40 | Kelly, Dayne v Osafune, Masaki | 6-1,6-1 |
| ITF China F7 | 2017/05/16 05:30 | Hung, Jui-Chen v Osafune, Masaki | 2-6,6-1,2-6 |
| ITF China F7 Qual | 2017/05/15 03:55 | Wang, Chukang v Osafune, Masaki | 7-5,4-6,1-6 |
| ITF China F7 Qual | 2017/05/14 02:55 | Osafune, Masaki v Calum Puttergill | 7-5,6-1 |
| ITF China F7 Qual | 2017/05/13 06:30 | Clark, Louis v Osafune, Masaki | 1-6,5-7 |
| ITF China F6 | 2017/05/09 03:10 | Osafune, Masaki v Yan Bai | 2-6,2-6 |
| ITF China F6 Qual | 2017/05/08 03:25 | Osafune, Masaki v Kazuma Kawachi | 6-2,6-4 |
| ITF Japan F7 | 2017/06/03 04:00 | Kato, Shoma v Numajiri, Keisuke | 6-4,6-1 |
| ITF Japan F3 | 2017/03/18 00:30 | Vinsant, Shane v Kato, Shoma | 6-1,6-1 |
| ITF Japan F2 | 2017/03/12 04:00 | Kato, Shoma v Rio Noguchi | 1-6,1-6 |
| ITF Japan F1 | 2017/03/08 01:00 | Kato, Shoma v Ehara, Hiroyasu | 3-6,2-6 |
| ITF Indonesia F3 Qual | 2017/02/20 11:15 | Robin Thour v Kato, Shoma | 6-3,7-5 |
| ITF Indonesia F3 Qual | 2017/02/19 10:25 | Moldovan, Cristian Stefan v Kato, Shoma | 4-6,1-6 |
| ITF Indonesia F2 Qual | 2017/02/12 12:30 | Purcell, Rhett v Kato, Shoma | 7-6,6-4 |
| ITF Indonesia F2 Qual | 2017/02/11 10:55 | Kato, Shoma v Butts, Skyler | 6-2,6-0 |