Ground: Clay
| ITF Japan F8 | 2015/06/25 01:00 | Katayama, Sho v Sasai, Masaki | 6-3,6-1 |
| ITF Japan F8 | 2015/06/24 01:10 | Oku, Hiromasa v Katayama, Sho | 6-7,0-6 |
| ITF Japan F6 | 2015/06/10 02:20 | Katayama, Sho v Toshihide Matsui | 7-5,3-6,4-6 |
| ITF Guam F1 | 2015/05/29 05:10 | Ko Suzuki v Katayama, Sho | 6-3,4-6,6-2 |
| ITF Guam F1 | 2015/05/28 00:00 | Thomas Fancutt v Katayama, Sho | 6-3,2-6,4-6 |
| ITF Thailand F9 | 2015/05/04 03:00 | Katayama, Sho v Grills, Jacob | 5-7,4-6 |
| ITF Thailand F9 | 2015/04/28 05:30 | Grills, Jacob v Katayama, Sho | 6-1,3-6,6-4 |
| ITF Thailand F9 | 2015/04/21 05:25 | Katayama, Sho v Lim, Yong-Kyu | 4-6,3-6 |
| ITF Japan F8 | 2015/06/25 02:00 | Takeshima, Shunrou v Ko Suzuki | 6-3,6-2 |
| ITF Japan F8 | 2015/06/24 02:50 | Takeshima, Shunrou v Sebaoun, Leo Julien | 6-3,6-2 |
| ITF Japan F7 | 2015/06/17 01:00 | Takeshima, Shunrou v Nagao, Katsuki | 6-7,3-6 |
| ITF Japan F6 | 2015/06/09 05:00 | Takeshima, Shunrou v Ryota Tanuma | 3-6,1-6 |
| ITF Japan F5 | 2015/06/04 01:00 | Saito, Takashi v Takeshima, Shunrou | 7-5,6-1 |
| ITF Japan F5 | 2015/06/02 01:00 | Takeshima, Shunrou v Kikuchi, Gengo | 7-5,6-4 |
| ITF Thailand F9 | 2015/04/25 06:30 | Kaewwongwattana, Soravich v Takeshima, Shunrou | 1-6,2-6 |
| ITF Thailand F9 | 2015/04/23 04:00 | Takeshima, Shunrou v Wattanakul, Pol | 1-6,4-6 |