| ITF Japan F8 | 2015/06/24 01:10 | Hiromasa Oku v Sho Katayama | 6-7,0-6 |
| ITF Japan F6 | 2015/06/10 02:20 | Sho Katayama v Toshihide Matsui | 7-5,3-6,4-6 |
| ITF Guam F1 | 2015/05/29 05:10 | Ko Suzuki v Sho Katayama | 6-3,4-6,6-2 |
| 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 F7 | 2015/06/17 01:00 | Masaki Sasai v Ryota Tanuma | 1-6,3-6 |
| ITF Japan F6 | 2015/06/12 05:30 | Takuto Niki v Masaki Sasai | 6-2,6-1 |
| ITF Japan F6 | 2015/06/11 01:00 | Yosuke Watanuki v Masaki Sasai | 3-6,2-6 |
| ITF Japan F6 | 2015/06/10 03:10 | Masaki Sasai v Shuichi Sekiguchi | 7-6,7-5 |
| ITF Japan F5 | 2015/06/03 06:30 | Takashi Saito v Masaki Sasai | 6-0,6-2 |
| ITF Guam F1 | 2015/05/26 00:00 | Hiromasa Oku v Masaki Sasai | 6-1,6-1 |
| ITF Japan F4 | 2015/03/31 03:50 | Masaki Sasai v Ryotaro Matsumura | 2-6,2-6 |
| ITF Japan F4 | 2015/03/28 03:00 | Masaki Sasai v Masayoshi Ono | 6-4,6-1 |