Round: 26 Ground: Hardcourt outdoor
| ITF Japan F4 | 2017/03/30 03:15 | Ryota Tanuma v Masaki Osafune | 7-5,3-6,6-3 |
| ITF Japan F4 | 2017/03/28 02:00 | Masaki Osafune v Rio Noguchi | 1-6,7-6,6-3 |
| ITF Japan F4 | 2017/03/25 02:00 | Hiromasa Oku v Masaki Osafune | 1-6,0-6 |
| ITF Japan F3 | 2017/03/18 03:00 | Masaya Kobayashi v Masaki Osafune | 7-6,6-7,6-4 |
| ITF Japan F2 | 2017/03/12 02:00 | Kittiphong Wachiramanowong v Masaki Osafune | 6-3,6-4 |
| ITF Japan F2 | 2017/03/11 03:00 | Masaki Osafune v Artem Vu | 6-2,6-1 |
| ITF Japan F1 | 2017/03/05 01:00 | Masaki Osafune v Keisuke Watanuki | 6-7,6-0,2-6 |
| ITF Japan F4 | 2016/03/27 01:00 | Katsuki Nagao v Masaki Osafune | 6-1,6-2 |
| ITF Japan F5 | 2017/04/04 00:30 | Yuichi Ito v Takuto Niki | 3-6,4-6 |
| ITF Japan F4 | 2017/03/30 03:00 | Yuichi Ito v Yusuke Takahashi | 3-6,3-6 |
| ITF Japan F4 | 2017/03/29 05:30 | Chan-Yeong Oh v Yuichi Ito | 4-6,1-6 |
| ITF Japan F3 | 2017/03/20 02:55 | Kaito Uesugi v Yuichi Ito | 7-5,3-6,6-2 |
| ITF Japan F2 | 2017/03/14 02:30 | Liang-Chi Huang v Yuichi Ito | 6-2,7-5 |
| ITF Japan F1 | 2017/03/09 02:25 | Yuichi Ito v Sho Katayama | 0-6,0-6 |
| ITF Japan F1 | 2017/03/07 02:30 | Naru Shirafuji v Yuichi Ito | 2-6,6-2,3-6 |
| Challenger Kyoto Qual | 2017/02/18 04:55 | Alex Bolt v Yuichi Ito | 6-2,6-0 |