Stadium: Court 3 Round: 44
| ITF Japan F7 | 2017/06/06 01:00 | Arata Onozawa v Masaki Sasai | 6-3,2-6,3-6 |
| ITF Japan F2 | 2015/03/17 04:10 | Masaki Sasai v Arata Onozawa | 6-4,6-4 |
| ITF Guam F1 | 2017/06/20 07:15 | Luca Castelnuovo v Masaki Sasai | 6-4,4-6,6-3 |
| 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 Hong Kong F1 | 2017/06/20 09:35 | Karunuday Singh v Arata Onozawa | 6-4,1-6,6-1 |
| ITF Japan F8 | 2017/06/15 03:05 | Arata Onozawa v Koichi Sano | 6-2,1-6,0-6 |
| ITF Japan F8 | 2017/06/14 03:00 | Johan Nikles v Arata Onozawa | 1-6,0-6 |
| ITF Japan F7 | 2017/06/06 01:00 | Arata Onozawa v Masaki Sasai | 6-3,2-6,3-6 |
| ITF Japan F6 | 2017/05/30 03:30 | Yuto Sakai v Arata Onozawa | 7-6,7-5 |
| ITF Singapore F1 Qual | 2017/05/21 04:00 | Arata Onozawa v Michael Look | 4-6,7-6,4-6 |
| ITF Japan F3 | 2017/03/19 01:00 | Arata Onozawa v Rimpei Kawakami | 3-6,6-2,2-6 |
| ITF Japan F3 | 2017/03/18 06:00 | Arata Onozawa v Sota Fujii | 6-4,6-3 |