Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF Japan F6 Qual | 2018/04/09 02:30 | Ito, Yuichi v Nakashima, Hajime | 1-6,1-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Ito, Yuichi v Ko Suzuki | 6-7,2-6 |
| ITF Japan F3 | 2018/03/18 01:30 | Ito, Yuichi v Takeshima, Shunrou | 6-7,6-7 |
| 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 Japan F8 | 2018/06/11 00:30 | Watanuki, Keisuke v Daisuke Sumizawa | 6-4,2-6,6-2 |
| ITF Japan F7 Qual | 2018/06/02 01:00 | Daisuke Sumizawa v Taisei Miyamoto | 2-6,4-6 |
| ITF Vietnam F3 | 2018/05/13 04:00 | Bybel, Nicholas v Daisuke Sumizawa | 6-1,6-3 |
| ITF Vietnam F3 | 2018/05/12 03:00 | Vu, Artem v Daisuke Sumizawa | 3-6,1-6 |
| ITF Vietnam F2 | 2018/05/05 05:00 | Daisuke Sumizawa v Navasirisomboon, Jirat | 2-6,5-7 |
| ITF Vietnam F1 | 2018/04/29 05:30 | Navasirisomboon, Jirat v Daisuke Sumizawa | 6-2,6-1 |
| ITF Vietnam F1 | 2018/04/28 05:00 | Yuttana Charoenphon v Daisuke Sumizawa | 4-6,2-6 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Aoran Wang v Daisuke Sumizawa | 6-2,6-2 |