Stadium: Court 7 Round: 44 Ground: Hardcourt outdoor
| ITF Japan F2 | 2016/03/12 00:30 | Keisuke Numajiri v Keisuke Watanuki | 6-2,2-6,1-6 |
| ITF Japan F8 | 2015/06/25 01:00 | Keisuke Numajiri v Keisuke Watanuki | 3-6,3-6 |
| Challenger Kyoto Qual | 2018/02/17 01:00 | Keisuke Watanuki v Kosuke Shibano | 4-6,4-6 |
| ITF Japan F8 | 2017/06/15 02:30 | Keisuke Watanuki v Hiroyasu Ehara | 1-6,3-6 |
| ITF Japan F8 | 2017/06/14 05:50 | Ryota Kishi v Keisuke Watanuki | 0-6,1-6 |
| ITF Japan F8 | 2017/06/12 00:00 | Keisuke Watanuki v Kazuki Nishiwaki | 6-2,6-2 |
| ITF Japan F8 | 2017/06/10 04:00 | Keisuke Watanuki v Taketo Takamisawa | 4-6,6-2,6-3 |
| ITF Japan F7 | 2017/06/08 01:30 | Keisuke Watanuki v Kento Takeuchi | 3-6,5-7 |
| ITF Japan F6 Qual | 2017/05/29 01:00 | Keisuke Watanuki v Yuto Sakai | 6-7,6-7 |
| ITF Japan F6 Qual | 2017/05/28 07:00 | Keisuke Watanuki v Yuto Sakai | 6-7,6-7 |
| ITF Japan F1 | 2018/03/04 03:00 | Keisuke Numajiri v Masaki Sasai | 1-6,6-3,0-6 |
| ITF Turkey F8 | 2018/02/24 09:30 | Keisuke Numajiri v Ivan Davydov | 1-6,7-6,5-7 |
| ITF Turkey F7 | 2018/02/17 06:30 | Bogdan Bobrov v Keisuke Numajiri | 6-3,6-2 |
| ITF Vietnam F3 | 2017/11/21 06:10 | Sho Katayama v Keisuke Numajiri | 6-4,6-4 |
| ITF Vietnam F3 | 2017/11/20 04:00 | Lawrence Bataljin v Keisuke Numajiri | 6-4,2-6,6-3 |
| ITF Vietnam F2 | 2017/11/12 04:00 | Jakub Paul v Keisuke Numajiri | 6-7,6-4,6-1 |
| ITF Malaysia F3 | 2017/10/29 00:00 | Yuichi Ito v Keisuke Numajiri | 6-4,6-2 |
| ITF Malaysia F3 | 2017/10/28 01:00 | Keisuke Numajiri v Alex Hunt | 6-0,6-1 |