Round: 25 Ground: Clay
| ITF Japan F6 | 2014/06/11 07:50 | Sho Katayama v Keisuke Watanuki | 6-3,7-5 |
| ITF Japan F4 | 2016/03/29 05:10 | Keisuke Watanuki v Shintaro Imai | 3-6,6-3,1-6 |
| ITF Japan F4 | 2016/03/28 01:00 | Gengo Kikuchi v Keisuke Watanuki | 2-6,7-5,6-7 |
| ITF Japan F4 | 2016/03/27 01:00 | Yusuke Takahashi v Keisuke Watanuki | 4-6,3-6 |
| ITF Japan F3 | 2016/03/22 03:10 | Ken Onishi v Keisuke Watanuki | 2-6,6-2,7-5 |
| ITF Japan F3 | 2016/03/20 02:30 | Masato Shiga v Keisuke Watanuki | 4-6,6-2,3-6 |
| ITF Japan F3 | 2016/03/19 03:45 | Rigele Te v Keisuke Watanuki | 2-6,1-6 |
| ITF Japan F2 | 2016/03/15 04:30 | Keisuke Watanuki v Yuya Kibi | 2-6,6-4,1-6 |
| ITF Japan F2 | 2016/03/13 01:00 | Aoran Wang v Keisuke Watanuki | 0-6,4-6 |
| ITF Japan F4 | 2016/03/29 02:00 | Sho Katayama v Yosuke Watanuki | 3-6,1-6 |
| ITF Japan F3 | 2016/03/22 01:00 | Yuya Ito v Sho Katayama | 6-4,6-0 |
| ITF Japan F2 | 2016/03/16 01:00 | Sho Katayama v Yuya Kibi | 4-6,3-6 |
| ITF Japan F2 | 2016/03/14 01:00 | Bowen Ouyang v Sho Katayama | 2-6,4-6 |
| ITF Japan F1 | 2016/03/10 04:25 | Shuichi Sekiguchi v Sho Katayama | 7-5,7-6 |
| ITF Japan F1 | 2016/03/08 01:00 | Sho Katayama v Yuichi Ito | 6-3,4-6,6-2 |
| ITF China F13 | 2015/08/13 01:30 | Sho Katayama v Tsung-Hua Yang | 3-6,5-7 |
| ITF China F13 | 2015/08/12 02:00 | Sho Katayama v Xi Qi | 7-5,6-2 |