Round: 25 Ground: Hardcourt outdoor
| ITF China F3 Qual | 2017/02/26 01:30 | Li, Yuanfeng v Daisuke Sumizawa | 7-6,6-4 |
| ITF China F3 Qual | 2017/02/25 03:00 | Liu, Shiyou v Daisuke Sumizawa | 2-6,2-6 |
| ITF China F2 Qual | 2017/02/20 04:20 | Tanuma, Ryota v Daisuke Sumizawa | 6-4,6-2 |
| ITF China F2 Qual | 2017/02/19 07:30 | Daisuke Sumizawa v Zheng, Weiqiang | 2-6,7-6,6-4 |
| ITF China F2 Qual | 2017/02/18 08:05 | Daisuke Sumizawa v Ji, Ang | 6-2,7-6 |
| ITF China F1 Qual | 2017/02/13 05:55 | Tao Mu v Daisuke Sumizawa | 7-6,1-6,6-4 |
| ITF China F1 Qual | 2017/02/12 08:15 | Daisuke Sumizawa v Jia, Yuxiao | 6-1,7-5 |
| ITF Hong Kong F1 | 2017/01/03 03:45 | Daisuke Sumizawa v Niki, Takuto | 1-6,0-6 |
| ITF Japan F2 | 2017/03/13 04:00 | Issei Okamura v Nam Hoang Ly | 2-6,2-6 |
| ITF Japan F1 | 2017/03/07 02:30 | Issei Okamura v Yuki Mochizuki | 2-6,4-6 |
| ITF China F3 | 2017/03/01 07:35 | Issei Okamura v Bortolotti, Marco | 3-6,5-7 |
| ITF China F2 | 2017/02/23 03:00 | Issei Okamura v Rubin Statham | 1-6,3-6 |
| ITF China F2 | 2017/02/21 02:00 | Silva, Caio v Issei Okamura | 1-6,0-6 |
| ITF China F1 | 2017/02/15 02:00 | Petrovic, Danilo v Issei Okamura | 6-3,6-2 |
| Launceston, Australia | 2017/02/04 01:25 | Issei Okamura v Itzstein, Zach | 6-3,4-6,6-7 |
| Challenger - Burnie - Qualifications | 2017/01/28 04:10 | Propoggia, Dane v Issei Okamura | 6-4,6-2 |