Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF Guam F1 | 2018/06/19 04:30 | Yuichi Ito v Daisuke Sumizawa | 6-3,4-6,6-3 |
| ITF Japan F6 Qual | 2018/04/09 02:30 | Yuichi Ito v Hajime Nakashima | 1-6,1-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Yuichi Ito v Ko Suzuki | 6-7,2-6 |
| ITF Japan F3 | 2018/03/18 01:30 | Yuichi Ito v Shunrou Takeshima | 6-7,6-7 |
| ITF Japan F2 | 2018/03/12 00:30 | Yuichi Ito v Shinta Fujii | 1-6,6-3,4-6 |
| ITF Japan F2 | 2018/03/11 00:30 | Yuichi Ito v Ryota Kishi | 7-6,7-5 |
| ITF Japan F1 | 2018/03/08 03:10 | Yuichi Ito v Takashi Saito | 2-6,4-6 |
| ITF Japan F1 | 2018/03/07 01:00 | Yuichi Ito v Taketo Takamisawa | 1-6,6-1,6-0 |
| ITF Guam F1 | 2018/06/20 00:00 | Keisuke Numajiri v David Barclay | 6-1,2-6,2-6 |
| ITF Japan F8 | 2018/06/09 01:00 | Yutaro Matsuzaki v David Barclay | 1-6,6-4,6-3 |
| ITF Japan F7 Qual | 2018/06/03 01:00 | Kazuki Shimizu v David Barclay | 6-0,6-4 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | Takuya Kumasaka v David Barclay | 5-7,6-3,6-1 |
| ITF Japan F6 Qual | 2018/04/07 01:00 | David Barclay v Yuichiro Inui | 1-6,7-6,6-4 |
| ITF Australia F4 Qual | 2018/03/26 01:10 | Aaron Addison v David Barclay | 7-5,6-4 |
| ITF Australia F4 Qual | 2018/03/25 00:30 | Brian Tran v David Barclay | 4-6,5-7 |
| ITF Australia F4 Qual | 2018/03/24 03:30 | David Barclay v Stefan Storch | 6-2,6-0 |