Round: 25 Ground: Hardcourt outdoor
| ITF Japan F8 | 2017/06/12 00:00 | Luca Castelnuovo v Yuto Sakai | 7-6,4-6,6-7 |
| ITF Japan F8 | 2017/06/10 05:00 | Luca Castelnuovo v Naoya Maesaki | 6-3,6-4 |
| ITF Japan F7 | 2017/06/04 01:00 | Rio Noguchi v Luca Castelnuovo | 6-1,6-1 |
| ITF Japan F7 | 2017/06/03 01:00 | Daisuke Sumizawa v Luca Castelnuovo | 3-6,3-6 |
| ITF Japan F6 | 2017/05/30 02:20 | Masaya Kobayashi v Luca Castelnuovo | 6-4,7-6 |
| ITF Japan F6 Qual | 2017/05/29 01:00 | Luca Castelnuovo v Kento Tagashira | 7-5,6-1 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Luca Castelnuovo v Mark Verryth | 6-3,6-2 |
| ITF Qatar F3 Qual | 2017/04/16 13:25 | Luca Castelnuovo v Christophe Nickels | 6-7,5-7 |
| ITF Japan F8 | 2017/06/15 01:00 | Yuta Shimizu v Masaki Sasai | 6-1,1-6,7-6 |
| ITF Japan F8 | 2017/06/13 01:30 | Rio Noguchi v Masaki Sasai | 1-6,6-4,4-6 |
| ITF Japan F7 | 2017/06/07 01:00 | Masaki Sasai v Yusuke Takahashi | 3-6,4-6 |
| ITF Japan F7 | 2017/06/06 01:00 | Arata Onozawa v Masaki Sasai | 6-3,2-6,3-6 |
| ITF Japan F6 | 2017/05/31 01:00 | Renta Tokuda v Masaki Sasai | 6-4,6-3 |
| ITF Japan F6 | 2017/05/30 06:00 | Yuga Tashiro v Masaki Sasai | 1-6,4-6 |
| ITF Japan F5 | 2017/04/04 04:30 | Yusuke Watanuki v Masaki Sasai | 6-2,6-2 |
| ITF Japan F5 | 2017/04/02 01:00 | Masaki Sasai v Keisuke Watanuki | 6-2,6-4 |