Stadium: Court 9 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Singapore | 2019/06/07 08:30 | Dayne Kelly v Ryota Tanuma | 6-3,6-4 |
| ITF M15 Singapore | 2019/06/06 09:00 | Abhinav Sanjeev Shanmugam v Ryota Tanuma | 3-6,6-3,2-6 |
| ITF M15 Singapore | 2019/06/04 02:00 | Siddhant Banthia v Ryota Tanuma | 2-6,6-4,1-6 |
| ITF M15 Singapore | 2019/06/01 03:00 | Maksim Tikhomirov v Ryota Tanuma | 7-5,6-3 |
| ITF M15 Singapore | 2019/05/31 02:00 | Ryota Tanuma v Manish Sureshkumar | 6-4,4-6,6-3 |
| ITF M15 Singapore | 2019/05/28 02:00 | Ryota Tanuma v Dusty H. Boyer | 6-4,6-1 |
| ITF M25 Nonthaburi | 2019/05/23 06:00 | Ji Sung Nam v Ryota Tanuma | 7-6,6-3 |
| ITF M25 Nonthaburi | 2019/05/22 03:00 | Ryota Tanuma v Anton Chekhov | 3-6,7-6,6-3 |
| ITF M15 Gimcheon | 2019/06/10 01:00 | Joseph W. Van Meter v Jaewoo Kim | 6-1,7-6 |
| Challenger Seoul Qual | 2018/04/28 01:30 | Thomas Fancutt v Jaewoo Kim | 6-2,6-3 |