Stadium: Court 7 Round: 44 Ground: Hardcourt outdoor
| ITF Malaysia F3 | 2017/10/29 00:00 | Ito, Yuichi v Numajiri, Keisuke | 6-4,6-2 |
| ITF Japan F2 | 2018/03/12 00:30 | Ito, Yuichi v Fujii, Shinta | 1-6,6-3,4-6 |
| ITF Japan F2 | 2018/03/11 00:30 | Ito, Yuichi v Kishi, Ryota | 7-6,7-5 |
| ITF Japan F1 | 2018/03/08 03:10 | Ito, Yuichi v Saito, Takashi | 2-6,4-6 |
| ITF Japan F1 | 2018/03/07 01:00 | Ito, Yuichi v Taketo Takamisawa | 1-6,6-1,6-0 |
| Challenger Kyoto Qual | 2018/02/17 05:15 | Tung-Lin Wu v Ito, Yuichi | 6-4,7-6 |
| ITF Israel F18 | 2017/12/13 08:00 | Mnushkin, Dmitry v Ito, Yuichi | 5-7,7-5,6-4 |
| ITF Israel F18 | 2017/12/12 10:55 | Dray, Eitan v Ito, Yuichi | 2-6,0-6 |
| ITF Israel F17 | 2017/12/07 09:00 | Ito, Yuichi v Bayard, Damien | 3-6,6-3,3-6 |
| ITF Japan F3 | 2018/03/17 00:30 | Watanuki, Keisuke v Numajiri, Keisuke | 3-6,1-6 |
| ITF Japan F1 | 2018/03/04 03:00 | Numajiri, Keisuke v Sasai, Masaki | 1-6,6-3,0-6 |
| Turkey F8, Singles Qualifying | 2018/02/24 09:30 | Numajiri, Keisuke v Davydov, Ivan | 1-6,7-6,5-7 |
| ITF Turkey F7 | 2018/02/17 06:30 | Bogdan Bobrov v Numajiri, Keisuke | 6-3,6-2 |
| ITF Vietnam F3 | 2017/11/21 06:10 | Katayama, Sho v Numajiri, Keisuke | 6-4,6-4 |
| ITF Vietnam F3 | 2017/11/20 04:00 | Lawrence Bataljin v Numajiri, Keisuke | 6-4,2-6,6-3 |
| ITF Vietnam F2 | 2017/11/12 04:00 | Jakub Paul v Numajiri, Keisuke | 6-7,6-4,6-1 |
| ITF Malaysia F3 | 2017/10/29 00:00 | Ito, Yuichi v Numajiri, Keisuke | 6-4,6-2 |