| ITF Korea F8 | 09/04 02:00 | 62 | Numajiri, Keisuke v 조, 광현 | 6-1,6-4 | |
| ITF Korea F8 | 08/28 02:00 | 62 | Numajiri, Keisuke v Jang, Woo Hyeok | 3-6,1-6 | |
| ITF Spain F26 Qual | 08/14 08:30 | 44 | Numajiri, Keisuke v Sanz Llopis, Aitor | 2-6,4-6 | |
| ITF Spain F25 | 08/09 10:00 | 25 | 본지, 벤자민 v Numajiri, Keisuke | 6-0,6-4 | |
| ITF Spain F24 | 08/03 20:15 | 25 | 볼트즈, 세바스티엔 v Numajiri, Keisuke | 6-2,7-5 | |
| ITF Spain F24 | 08/01 09:00 | 62 | Numajiri, Keisuke v 아리아스, 보리스 | 6-4,7-6 | |
| ITF Spain F24 | 07/31 14:00 | 62 | Numajiri, Keisuke v 발레조, 미구엘 | 6-2,6-2 | |
| ITF Macedonia F2 | 06/28 07:30 | 25 | 라조브, 알렉산더 v Numajiri, Keisuke | 6-1,6-0 | |
| ITF Macedonia F2 | 06/27 07:30 | 44 | Radinski, Aljaz v Numajiri, Keisuke | 3-6,0-6 | |
| ITF Macedonia F2 | 06/26 07:30 | 44 | 바직, 보그단 v Numajiri, Keisuke | 1-6,6-7 | |
| ITF Macedonia F1 Qual | 06/20 08:00 | 44 | 라키치, 스트라힌자 v Numajiri, Keisuke | 6-3,6-2 | |
| ITF Macedonia F1 Qual | 06/19 14:00 | 44 | 네마, 파트리크 v Numajiri, Keisuke | 4-6,1-6 | |
| ITF Turkey F24 | 06/15 11:30 | 25 | Numajiri, Keisuke v Delic, Mate | 1-6,1-6 | |
| ITF Turkey F23 MD | 06/09 10:55 | 26 | Numajiri, Keisuke v 볼루다-푸르키스, 카를로스 | 6-3,4-6,0-6 | |
| ITF Turkey F23 MD | 06/08 11:30 | 25 | Petersen, Bjoern v Numajiri, Keisuke | 1-6,1-6 | |
| ITF Turkey F23 MD | 06/06 07:00 | 44 | Numajiri, Keisuke v 칼다비, 스테펜 | 6-3,6-1 | |
| ITF Turkey F23 MD | 06/05 11:30 | 44 | Numajiri, Keisuke v 마르티네즈, 로우로이 | 6-7,7-5,6-0 | |
| ITF Turkey F19 | 05/13 07:30 | 27 | Yuksel, Anil v Numajiri, Keisuke | 3-6,6-1,6-2 | |
| ITF Turkey F19 | 05/12 08:00 | 26 | Sentay, Alp v Numajiri, Keisuke | 4-6,0-6 | |
| ITF Turkey F19 | 05/11 13:00 | 25 | Numajiri, Keisuke v 에스코피어, 안토니 | 4-6,6-3,7-6 | |
| ITF Turkey F19 Qual | 05/09 08:00 | 44 | Numajiri, Keisuke v 이누이, 유이치로 | 6-0,6-3 | |
| ITF Turkey F19 Qual | 05/08 10:00 | 44 | Numajiri, Keisuke v Gulcur, Polat | 6-2,6-1 | |
| ITF Turkey F18 | 05/05 09:30 | 26 | Numajiri, Keisuke v Sieber, Marc | 0-6,2-6 | |
| ITF Turkey F18 | 05/03 10:00 | 25 | 모리타니, 소이치로 v Numajiri, Keisuke | 6-4,4-6,3-6 | |
| ITF Turkey F18 | 05/02 08:00 | 44 | Numajiri, Keisuke v Osmakcic, Marko | 7-5,7-5 | |
| Turkey F17, Singles Qualifying | 04/28 10:00 | 26 | 니에스텐, 밀리안 v Numajiri, Keisuke | 6-2,6-1 | |
| Turkey F17, Singles Qualifying | 04/27 09:25 | 25 | Numajiri, Keisuke v Suluoglu, Sefa | 6-2,6-1 | |
| Turkey F17, Singles Qualifying | 04/25 08:00 | 44 | 모리타니, 소이치로 v Numajiri, Keisuke | 1-6,2-6 | |
| ITF Japan F4 | 03/28 01:00 | 62 | 야마사키, 점페이 v Numajiri, Keisuke | 6-4,6-4 | |
| ITF Japan F4 | 03/26 02:00 | 62 | Numajiri, Keisuke v 정, 웨이치앙 | 7-6,4-6,6-2 |