Round: 25 Ground: Hardcourt outdoor
| ITF Japan F4 | 2017/03/28 01:00 | Oh, Chan-Yeong v Matsuo, Yuki | 6-1,6-1 |
| ITF Japan F4 | 2017/03/25 02:00 | Oh, Chan-Yeong v Kudo, Hayato | 6-3,6-3 |
| ITF Japan F3 | 2017/03/23 01:00 | Vinsant, Shane v Oh, Chan-Yeong | 6-2,3-6,6-3 |
| ITF Japan F3 | 2017/03/22 03:00 | Oh, Chan-Yeong v Moritani, Soichiro | 6-3,3-6,6-4 |
| ITF Japan F3 | 2017/03/20 01:00 | Masaya Kobayashi v Oh, Chan-Yeong | 4-6,2-6 |
| ITF Japan F3 | 2017/03/19 01:00 | Oh, Chan-Yeong v Maesaki, Naoya | 6-2,6-4 |
| ITF Japan F3 | 2017/03/18 08:00 | Oh, Chan-Yeong v Nakamura, Yuki | 6-3,1-6,7-5 |
| ITF Japan F3 | 2017/03/18 03:00 | Oh, Chan-Yeong v Furuta, Ibuki | 7-6,6-1 |
| ITF Japan F3 | 2017/03/20 02:55 | Kaito Uesugi v Ito, Yuichi | 7-5,3-6,6-2 |
| ITF Japan F2 | 2017/03/14 02:30 | Huang, Liang-Chi v Ito, Yuichi | 6-2,7-5 |
| ITF Japan F1 | 2017/03/09 02:25 | Ito, Yuichi v Katayama, Sho | 0-6,0-6 |
| ITF Japan F1 | 2017/03/07 02:30 | Shirafuji, Naru v Ito, Yuichi | 2-6,6-2,3-6 |
| Challenger Kyoto Qual | 2017/02/18 04:55 | Alex Bolt v Ito, Yuichi | 6-2,6-0 |
| ITF Turkey F5 | 2017/02/08 08:00 | Ito, Yuichi v Bothwell, Peter | 3-6,4-6 |
| ITF Turkey F5 | 2017/02/06 09:30 | Benjamin Lock v Ito, Yuichi | 4-6,4-6 |
| ITF Turkey F4 | 2017/01/30 07:00 | Ito, Yuichi v Mircea-Alexandru Jecan | 6-3,3-6,5-7 |