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 Anning | 2024/05/24 03:00 | Takuya Kumasaka v Nico Hornitschek | 6-4,6-7,6-7 |
| ITF M25 Anning | 2024/05/23 06:10 | Takuya Kumasaka v Hanyi Liu | 7-6,4-6,6-3 |
| ITF M25 Anning | 2024/05/22 07:55 | Zhe Li v Takuya Kumasaka | 5-7,6-3,5-7 |
| ITF M25 Luan | 2024/05/18 02:00 | Takuya Kumasaka v Fajing Sun | 3-6,1-6 |
| ITF M25 Luan | 2024/05/17 04:45 | Sheng Tang v Takuya Kumasaka | 6-7,3-6 |
| ITF M25 Luan | 2024/05/16 03:30 | Takuya Kumasaka v Zhengyu Sun | 6-1,6-1 |
| ITF M25 Luan | 2024/05/15 02:00 | Takuya Kumasaka v Sungbeen Sim | 6-3,6-1 |
| ITF M15 Monastir | 2024/05/11 08:00 | Vladyslav Orlov v Takuya Kumasaka | 6-2,6-4 |
| ITF M15 Tokyo | 2024/07/01 03:30 | Naoki Tajima v Kohshi Ishibashi | 6-2,6-7,7-10 |
| ITF M15 Hong Kong | 2024/06/19 06:40 | Kasidit Samrej v Naoki Tajima | 6-0,6-3 |
| ITF M15 Anseong | 2024/06/13 01:00 | Naoki Tajima v Chase Ferguson | 0-6,2-6 |
| ITF M15 Anseong | 2024/06/12 01:00 | Woohyuk Chang v Naoki Tajima | 1-6,2-6 |
| ITF M15 Harmon | 2024/06/07 00:00 | Sora Fukuda v Naoki Tajima | 6-2,6-1 |
| ITF M15 Harmon | 2024/06/06 00:00 | Naoki Tajima v Shinji Hazawa | 7-6,6-4 |
| ITF M15 Harmon | 2024/06/05 04:30 | Issei Okamura v Naoki Tajima | 6-3,3-6,3-6 |
| ITF M15 Karuizawa | 2024/05/29 02:00 | Kokoro Isomura v Naoki Tajima | 6-2,6-1 |