Stadium: 9 Round: 26 Ground: Hardcourt outdoor
| Challenger Burnie | 2024/01/28 03:40 | Takuya Kumasaka v Naoki Tajima | 6-4,7-6 |
| ITF M25 Sapporo | 2022/09/07 00:30 | Takuya Kumasaka v Naoki Tajima | 7-6,6-0 |
| ITF M25 Sapporo | 2024/09/11 03:00 | Takuya Kumasaka v Hyu Kawanishi | 6-0,6-1 |
| ITF M25 Sapporo | 2024/09/03 02:50 | Takuya Kumasaka v Jacob Brumm | 5-7,3-6 |
| ITF M25 Taipei | 2024/08/07 02:00 | Edward Winter v Takuya Kumasaka | 6-4,6-4 |
| ITF M25 Taipei | 2024/08/02 02:00 | Keisuke Saitoh v Takuya Kumasaka | 6-1,6-4 |
| ITF M25 Taipei | 2024/07/30 01:55 | Taisei Ichikawa v Takuya Kumasaka | 3-6,4-6 |
| ITF M25 Tianjin | 2024/07/16 05:40 | Takuya Kumasaka v Fnu Nidunjianzan | 5-7,6-4,6-2 |
| ITF M15 Tokyo | 2024/07/10 01:55 | Masamichi Imamura v Takuya Kumasaka | 6-4,6-4 |
| ITF M25 Anning | 2024/05/24 03:00 | Takuya Kumasaka v Nico Hornitschek | 6-4,6-7,6-7 |
| ITF M25 Sapporo | 2024/09/10 02:30 | Taisei Ichikawa v Naoki Tajima | 6-3,2-6,1-6 |
| ITF M25 Aldershot | 2024/08/11 09:00 | Naoki Tajima v James Story | 4-6,3-6 |
| ITF M25 Roehampton | 2024/08/08 08:55 | Ryan Peniston v Naoki Tajima | 6-2,6-2 |
| ITF M25 Roehampton | 2024/08/06 16:30 | Louis Bowden v Naoki Tajima | 6-7,6-2,1-6 |
| ITF M25 Roehampton | 2024/08/05 12:35 | Naoki Tajima v Kyle Rae | 6-3,6-3 |
| ITF M25 Roehampton Qual | 2024/08/04 14:35 | Naoki Tajima v Daniel Leong Prickett | 6-3,6-0 |
| ITF M15 Tokyo | 2024/07/08 03:30 | Naoki Tajima v Seiya Nakanishi | 3-6,6-3,6-10 |
| ITF M15 Tokyo | 2024/07/01 03:30 | Naoki Tajima v Kohshi Ishibashi | 6-2,6-7,7-10 |