Stadium: Court 8 Round: 26 Ground: Hardcourt outdoor
| ITF Thailand F4 | 2016/12/14 03:00 | Yong-Kyu Lim v Ryota Tanuma | 6-2,6-3 |
| ITF M15 Gimcheon | 2019/06/18 03:00 | Ryota Tanuma v Jaewoo Kim | 6-1,6-3 |
| 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 M15 Gimcheon | 2019/06/18 05:45 | Uisung Park v Yong-Kyu Lim | 1-6,2-6 |
| ITF M15 Gimcheon | 2019/06/15 02:00 | Yuta Shimizu v Yong-Kyu Lim | 3-6,6-3,6-4 |
| ITF M15 Gimcheon | 2019/06/12 04:40 | Yong-Kyu Lim v Suk Hyun Choo | 6-2,6-0 |
| ITF M15 Daegu | 2019/06/04 04:50 | Jung-Woong Na v Yong-Kyu Lim | 6-2,6-3 |
| Davis Cup | 2018/09/15 05:35 | Yong-Kyu Lim v Michael Venus | 7-6,6-4 |
| ITF Korea F1 | 2018/06/10 03:00 | Yong-Kyu Lim v Jeamoon Lee | 6-4,7-6 |
| ITF Korea F1 | 2018/06/09 01:00 | Cheong-Eui Kim v Yong-Kyu Lim | 2-6,3-6 |
| ITF Korea F1 | 2018/06/08 02:00 | Ji Sung Nam v Yong-Kyu Lim | 1-6,2-6 |