Stadium: Court 2 Round: 54 Ground: Synthetic outdoor
| ITF Japan F7 Qual | 2018/06/02 03:00 | Tomohiro Masabayashi v Kurita, Kenta | 6-2,6-3 |
| ITF Japan F5 | 2018/03/31 00:30 | Rio Noguchi v Tomohiro Masabayashi | 4-6,6-1,7-5 |
| ITF Japan F4 | 2018/03/25 01:00 | Tomohiro Masabayashi v Murray, Jack | 6-7,0-6 |
| ITF Japan F4 | 2018/03/24 04:00 | Wakita, Shunsuke v Tomohiro Masabayashi | 2-6,5-7 |
| ITF Japan F3 | 2018/03/17 00:30 | Tomohiro Masabayashi v Kawakami, Rimpei | 2-6,4-6 |
| ITF Japan F2 | 2018/03/12 00:30 | Tamaki Yamao v Tomohiro Masabayashi | 6-3,4-6,6-1 |
| ITF Japan F2 | 2018/03/11 00:30 | Tomohiro Masabayashi v Furuta, Ibuki | 6-3,4-6,6-2 |
| ITF Japan F2 | 2018/03/10 02:30 | Tomohiro Masabayashi v Azuma, Ryuhei | 6-4,6-3 |
| ITF Japan F7 Qual | 2018/06/02 03:00 | Ko Suzuki v Matsuo, Yuki | 5-7,6-0,6-4 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | Kaito Uesugi v Ko Suzuki | 7-6,6-4 |
| ITF Japan F5 | 2018/04/01 00:30 | Ko Suzuki v Kazuma Kawachi | 4-6,4-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Ito, Yuichi v Ko Suzuki | 6-7,2-6 |
| ITF Japan F4 | 2018/03/25 01:00 | Tamaki Yamao v Ko Suzuki | 6-4,6-2 |
| ITF Japan F3 | 2018/03/17 02:30 | Kikuchi, Gengo v Ko Suzuki | 6-2,3-6,6-3 |
| Challenger Kyoto Qual | 2018/02/19 01:30 | Ko Suzuki v Garanganga, Takanyi | 5-7,4-6 |
| Challenger Kyoto Qual | 2018/02/18 02:45 | Naoki Nakagawa v Ko Suzuki | 6-7,6-7 |