Round: 62 Ground: Clay
| ITF Japan F8 | 2018/06/09 05:10 | Masaya Kobayashi v Taisei Miyamoto | 6-3,6-3 |
| ITF Japan F8 | 2018/06/09 01:00 | Masaya Kobayashi v Steven Goh | 3-6,6-3,6-0 |
| ITF Japan F7 Qual | 2018/06/02 01:00 | Masaya Kobayashi v Kazuki Shimizu | 6-7,3-6 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Ryota Kishi v Masaya Kobayashi | 6-2,6-1 |
| ITF Japan F3 | 2018/03/19 02:15 | Masaya Kobayashi v Takashi Saito | 6-4,4-6,6-4 |
| ITF Japan F2 | 2018/03/12 02:30 | Kento Takeuchi v Masaya Kobayashi | 6-3,4-6,6-3 |
| ITF Japan F1 | 2018/03/05 01:00 | Gengo Kikuchi v Masaya Kobayashi | 6-2,7-5 |
| ITF Japan F1 | 2018/03/04 01:00 | Tomohiro Masabayashi v Masaya Kobayashi | 1-6,6-3,5-7 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | Ryuhei Azuma v Yuto Sakai | 2-6,2-6 |
| ITF Japan F2 | 2018/03/10 02:30 | Tomohiro Masabayashi v Ryuhei Azuma | 6-4,6-3 |
| ITF Japan F1 | 2018/03/04 01:00 | Naru Shirafuji v Ryuhei Azuma | 6-2,6-2 |