Ground: Hardcourt outdoor
| ITF M15 Tsukuba | 2024/03/24 01:00 | Taiyo Yamanaka v Jumpei Yamasaki | 3-6,1-6 |
| ITF M15 Nishi-Tokyo | 2024/03/19 01:00 | Jumpei Yamasaki v Taiyo Yamanaka | 5-7,3-6 |
| ITF M15 Osaka | 2025/04/22 01:00 | Pavle Marinkov v Taiyo Yamanaka | 7-5,0-6,6-4 |
| ITF M15 Osaka | 2025/04/16 01:00 | Taisei Ichikawa v Taiyo Yamanaka | 7-6,7-6 |
| ITF M15 Kashiwa | 2025/04/05 03:05 | Taiyo Yamanaka v Hikaru Shiraishi | 4-6,2-6 |
| ITF M15 Kashiwa | 2025/04/04 01:00 | Kokoro Isomura v Taiyo Yamanaka | 5-7,1-6 |
| ITF M15 Kashiwa | 2025/04/02 02:30 | Taiyo Yamanaka v Yuta Tomida | 6-3,6-1 |
| ITF M15 Tsukuba | 2025/03/28 01:00 | Filip Peliwo v Taiyo Yamanaka | 6-2,6-4 |
| ITF M15 Tsukuba | 2025/03/27 01:00 | Taiyo Yamanaka v Naoki Nakagawa | 7-6,6-1 |
| ITF M15 Tsukuba | 2025/03/26 02:30 | Kosuke Shibano v Taiyo Yamanaka | 4-6,0-6 |
| ITF M15 Osaka | 2025/04/26 02:00 | Shintaro Imai v Jumpei Yamasaki | 6-4,6-1 |
| ITF M15 Osaka | 2025/04/25 01:00 | Jumpei Yamasaki v Yusuke Kusuhara | 6-3,6-3 |
| ITF M15 Osaka | 2025/04/24 04:00 | Hikaru Shiraishi v Jumpei Yamasaki | 7-6,6-7,0-3 |
| ITF M15 Osaka | 2025/04/22 04:15 | Jumpei Yamasaki v Issei Okamura | 6-3,6-4 |
| ITF M15 Osaka | 2025/04/18 01:00 | Jumpei Yamasaki v Renta Tokuda | 1-6,4-6 |
| ITF M15 Osaka | 2025/04/17 02:30 | Pavle Marinkov v Jumpei Yamasaki | 3-6,4-6 |
| ITF M15 Osaka | 2025/04/16 02:30 | Ryotaro Matsumura v Jumpei Yamasaki | 1-6,5-7 |
| ITF M15 Tsukuba | 2025/03/27 01:00 | Yu Hsiou Hsu v Jumpei Yamasaki | 7-5,6-2 |