Ground: Hardcourt outdoor
| ITF Guam F1 | 2015/05/28 00:00 | Koichi Sano v Ko Suzuki | 2-6,1-6 |
| ITF Japan F3 | 2015/03/23 01:00 | Ko Suzuki v Jeamoon Lee | 3-6,0-6 |
| ITF Japan F3 | 2015/03/21 04:00 | Ko Suzuki v Ryotaro Matsumura | 6-0,6-1 |
| ITF Japan F2 | 2015/03/17 05:25 | Ko Suzuki v Soichiro Moritani | 6-3,3-6,2-6 |
| ITF Japan F1 | 2015/03/11 01:00 | Jarryd Chaplin v Ko Suzuki | 6-4,6-4 |
| ITF Chinese Taipei F1 | 2014/08/27 02:00 | Kento Takeuchi v Ko Suzuki | 6-0,6-4 |
| ITF Chinese Taipei F1 | 2014/08/20 02:00 | Takuto Niki v Ko Suzuki | 6-4,6-0 |
| ITF Thailand F9 | 2014/07/07 05:35 | Vishnu Vardhan v Ko Suzuki | 7-6,6-4 |
| ITF Guam F1 | 2015/05/28 00:00 | Thomas Fancutt v Sho Katayama | 6-3,2-6,4-6 |
| ITF Thailand F9 | 2015/05/04 03:00 | Sho Katayama v Jacob Grills | 5-7,4-6 |
| ITF Thailand F9 | 2015/04/28 05:30 | Jacob Grills v Sho Katayama | 6-1,3-6,6-4 |
| ITF Thailand F9 | 2015/04/21 05:25 | Sho Katayama v Yong-Kyu Lim | 4-6,3-6 |
| ITF Japan F4 | 2015/04/01 01:00 | Sho Katayama v Kento Takeuchi | 3-6,3-6 |
| ITF Japan F4 | 2015/03/31 03:50 | Sho Katayama v Xin Gao | 6-2,6-1 |
| ITF Japan F3 | 2015/03/26 01:00 | Di Wu v Sho Katayama | 6-2,7-5 |
| ITF Japan F3 | 2015/03/24 01:00 | Duckhee Lee v Sho Katayama | 0-6,6-3,4-6 |