Stadium: Court 9 Round: 45 Ground: Hardcourt outdoor
| Challenger Yokohama | 2019/02/25 02:45 | Luke Saville v Kaito Uesugi | 2-6,6-4,6-2 |
| Challenger Chennai | 2019/02/05 06:30 | Kaito Uesugi v Collin Altamirano | 6-1,3-6,6-7 |
| Challenger Chennai | 2019/02/04 04:30 | Kaito Uesugi v Dhakshineswar Suresh | 6-1,6-3 |
| Challenger Da Nang | 2019/01/07 03:00 | Kaito Uesugi v Arthur Rinderknech | 3-6,4-6 |
| Challenger Da Nang | 2019/01/06 03:30 | Alafia Ayeni v Kaito Uesugi | 6-7,6-2,3-6 |
| Challenger Kobe | 2018/11/12 04:55 | Go Soeda v Kaito Uesugi | 6-3,6-1 |
| Challenger Ningbo | 2018/10/14 04:05 | Yuta Shimizu v Kaito Uesugi | 3-6,6-2,6-1 |
| Challenger Ningbo | 2018/10/13 04:30 | Miliaan Niesten v Kaito Uesugi | 5-7,4-6 |
| ITF M15 - Mornington | 2019/03/24 23:00 | Joseph W. Van Meter v Ren Nakamura | 3-6,7-5,13-11 |
| ITF M15 - Mornington | 2019/03/17 23:00 | Ren Nakamura v Mislav Bosnjak | 2-6,4-6 |
| ITF M25 Mildura | 2019/03/06 05:50 | Ren Nakamura v Lucas Vuradin | 4-6,2-6 |
| ITF M25 Mildura | 2019/03/04 23:00 | William Ma v Ren Nakamura | 4-6,2-6 |
| ITF M25 Mildura | 2019/03/04 01:30 | Winter Meagher v Ren Nakamura | 4-6,1-6 |
| ITF M25 - Albury | 2019/02/26 23:30 | Rio Noguchi v Ren Nakamura | 6-1,6-1 |
| ITF M25 - Albury | 2019/02/26 01:40 | Cameron Green v Ren Nakamura | 7-6,6-7,5-10 |
| ITF M25 - Albury | 2019/02/25 02:00 | Lawrence Bataljin v Ren Nakamura | 3-6,2-6 |