Round: 25 Ground: Hardcourt outdoor
| ITF Japan F7 Qual | 2016/06/05 01:00 | Masaya Kobayashi v Chan-Yeong Oh | 2-6,6-3,3-6 |
| ITF Japan F3 | 2017/03/19 01:00 | Masaya Kobayashi v Yunosuke Tanaka | 5-7,6-2,6-1 |
| ITF Japan F3 | 2017/03/18 08:00 | Masaya Kobayashi v Yuta Kawahashi | 6-2,7-5 |
| ITF Japan F3 | 2017/03/18 03:00 | Masaya Kobayashi v Masaki Osafune | 7-6,6-7,6-4 |
| ITF Japan F2 | 2017/03/14 02:30 | Masaya Kobayashi v Xin Gao | 4-6,2-6 |
| ITF Japan F1 | 2017/03/09 03:40 | Masaya Kobayashi v Wishaya Trongcharoenchaikul | 0-6,3-6 |
| ITF Japan F1 | 2017/03/08 01:00 | Masaya Kobayashi v Soichiro Moritani | 6-3,6-4 |
| ITF Japan F1 | 2017/03/06 01:00 | Masaya Kobayashi v Naru Shirafuji | 7-5,6-2 |
| ITF Japan F1 | 2017/03/05 01:00 | Masaya Kobayashi v Yuto Sakai | 7-6,7-5 |
| ITF Japan F3 | 2017/03/19 01:00 | Chan-Yeong Oh v Naoya Maesaki | 6-2,6-4 |
| ITF Japan F3 | 2017/03/18 08:00 | Chan-Yeong Oh v Yuki Nakamura | 6-3,1-6,7-5 |
| ITF Japan F3 | 2017/03/18 03:00 | Chan-Yeong Oh v Ibuki Furuta | 7-6,6-1 |
| ITF Indonesia F3 | 2017/02/23 03:00 | Sho Katayama v Chan-Yeong Oh | 7-6,7-6 |
| ITF Indonesia F3 | 2017/02/22 05:20 | Chan-Yeong Oh v Mohd Assri Merzuki | 6-3,6-4 |
| ITF Indonesia F2 | 2017/02/17 03:00 | Chan-Yeong Oh v Nathan Pasha | 1-6,2-6 |
| ITF Indonesia F2 | 2017/02/16 03:30 | Cheong-Eui Kim v Chan-Yeong Oh | 6-4,4-6,6-7 |
| ITF Indonesia F2 | 2017/02/15 06:00 | Sho Shimabukuro v Chan-Yeong Oh | 5-7,7-5,5-7 |