| ITF Japan F8 | 2015/06/26 01:00 | Katayama, Sho v Takeshima, Shunrou | 3-6,6-0,6-3 |
| 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 Japan F8 | 2015/06/26 02:00 | Makoto Ochi v Renta Tokuda | 3-6,6-4,4-6 |
| ITF Japan F8 | 2015/06/25 01:00 | Renta Tokuda v Niki, Takuto | 2-6,7-6,6-3 |
| ITF Japan F8 | 2015/06/23 01:00 | Ryota Tanuma v Renta Tokuda | 6-1,1-6,5-7 |
| ITF Japan F7 | 2015/06/18 00:30 | Onozawa, Arata v Renta Tokuda | 6-4,6-2 |
| ITF Japan F7 | 2015/06/16 00:30 | Higa, Akito v Renta Tokuda | 0-6,1-6 |
| ITF Japan F7 Qual | 2015/06/15 00:30 | Renta Tokuda v Numajiri, Keisuke | 3-6,1-6 |
| ITF Japan F7 Qual | 2015/06/14 00:00 | Renta Tokuda v Tsunematsu, Takumi | 6-1,7-5 |
| ITF Japan F6 | 2015/06/09 04:00 | Watanuki, Yusuke v Renta Tokuda | 7-5,2-6,6-2 |