Stadium: I Round: 27 Ground: Clay
| ITF Japan F3 | 2018/03/22 08:45 | Katayama, Sho v Kaito Uesugi | 3-6,1-6 |
| ITF Japan F4 | 2014/04/02 03:20 | Katayama, Sho v Kaito Uesugi | 6-2,5-7,4-6 |
| ITF Japan F8 | 2018/06/14 02:50 | Katayama, Sho v Watanuki, Keisuke | 6-2,6-0 |
| ITF Japan F8 | 2018/06/12 01:00 | Katayama, Sho v Inoue, Haru | 6-1,6-4 |
| ITF China F8 | 2018/06/08 04:10 | Katayama, Sho v Ehara, Hiroyasu | 0-6,2-6 |
| ITF China F8 | 2018/06/06 02:00 | Katayama, Sho v Bang Shuo Yin | 6-2,6-4 |
| ITF China F8 | 2018/06/04 03:50 | Katayama, Sho v Wu, Hao | 6-2,6-2 |
| ITF Japan F6 | 2018/04/11 01:00 | Katayama, Sho v Li, Zhe | 1-6,6-3,4-6 |
| ITF Japan F5 | 2018/04/03 04:10 | Katayama, Sho v Renta Tokuda | 2-6,4-6 |
| ITF Japan F4 | 2018/03/30 03:30 | Katayama, Sho v Yosuke Watanuki | 4-6,4-6 |
| ITF Japan F8 | 2018/06/14 02:50 | Kaito Uesugi v Ryotaro Matsumura | 7-6,1-6,7-6 |
| ITF Japan F8 | 2018/06/13 01:00 | Kaito Uesugi v Naoki Tajima | 2-6,6-3,6-3 |
| ITF Japan F7 | 2018/06/07 02:00 | Kaito Uesugi v Saito, Takashi | 6-0,5-7,5-7 |
| ITF Japan F7 | 2018/06/05 02:55 | Kaito Uesugi v Purcell, Rhett | 7-5,6-0 |
| ITF Singapore F2 | 2018/05/24 03:00 | Kaito Uesugi v Thai-Son Kwiatkowski | 5-7,6-0,2-6 |
| ITF Singapore F2 | 2018/05/23 02:00 | Banes, Maverick v Kaito Uesugi | 4-6,6-4,1-6 |
| ITF Singapore F2 | 2018/05/22 07:45 | Barki, Justin v Kaito Uesugi | 2-6,4-6 |
| ITF Singapore F2 | 2018/05/20 03:00 | Kaito Uesugi v Butts, Skyler | 6-0,6-3 |