Ground: Hardcourt outdoor
| ITF M15 Maanshan | 2025/06/26 02:00 | Kokoro Isomura v Taisei Ichikawa | 6-4,6-4 |
| ITF M25 Taipei | 2025/08/19 03:30 | Taisei Ichikawa v Ethan Cook | 6-3,6-3 |
| ITF M15 Astana | 2025/08/07 07:00 | Taisei Ichikawa v Egor Gerasimov | 2-6,6-7 |
| ITF M15 Astana | 2025/08/06 08:51 | Alp Horoz v Taisei Ichikawa | 3-6,1-6 |
| Challenger Astana | 2025/07/28 08:15 | Taisei Ichikawa v Uisung Park | 3-6,3-6 |
| Challenger Astana | 2025/07/27 08:25 | Taisei Ichikawa v Grigoriy Lomakin | 6-4,3-6,7-6 |
| ITF M15 Tokyo | 2025/07/10 03:18 | Yusuke Kusuhara v Taisei Ichikawa | 4-6,6-2,7-6 |
| ITF M15 Tokyo | 2025/07/09 03:42 | Sora Fukuda v Taisei Ichikawa | 2-6,6-7 |
| ITF M15 Tokyo | 2025/07/02 05:06 | Yu Tanaka v Taisei Ichikawa | 7-6,7-6 |
| ITF M25 Bali | 2025/08/12 01:30 | Sidharth Rawat v Kokoro Isomura | 4-6,6-3,6-4 |
| ITF M25 Bali | 2025/08/07 01:30 | Kokoro Isomura v Yurii Dzhavakian | 1-6,3-6 |
| ITF M25 Bali | 2025/08/06 03:00 | Kokoro Isomura v Anthony Susanto | 6-2,7-5 |
| Challenger Astana | 2025/07/28 09:30 | Aleksandre Bakshi v Kokoro Isomura | 6-1,6-7,6-3 |
| ITF M15 Tokyo | 2025/07/12 03:30 | Shintaro Imai v Kokoro Isomura | 6-4,6-7,6-4 |
| ITF M15 Tokyo | 2025/07/11 01:00 | Colin Sinclair v Kokoro Isomura | 3-6,6-4,4-6 |
| ITF M15 Tokyo | 2025/07/10 01:00 | Yuta Tomida v Kokoro Isomura | 5-7,3-6 |
| ITF M15 Tokyo | 2025/07/08 05:19 | Ryotaro Matsumura v Kokoro Isomura | 7-6,4-6,3-6 |