Stadium: Court 9 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Karuizawa | 2023/06/01 02:40 | Jumpei Yamasaki v Takuya Kumasaka | 6-3,6-2 |
| ITF M25 Sapporo | 2023/09/06 00:55 | Yuichiro Inui v Takuya Kumasaka | 3-6,4-6 |
| ITF M25 Hong Kong | 2023/09/03 02:00 | Takuya Kumasaka v Kasidit Samrej | 3-6,6-1,5-10 |
| ITF M25 Hong Kong | 2023/08/31 02:00 | Tsung-Hao Huang v Takuya Kumasaka | 6-1,2-6,1-6 |
| ITF M25 Hong Kong | 2023/08/29 03:40 | Ki Lung NG v Takuya Kumasaka | 6-4,0-6,1-6 |
| ITF M25 Tainan | 2023/08/25 02:00 | Ergi Kirkin v Takuya Kumasaka | 6-2,6-2 |
| ITF M25 Tainan | 2023/08/24 05:10 | Kai-I Wang v Takuya Kumasaka | 4-6,6-3,2-6 |
| ITF M25 Tainan | 2023/08/17 04:05 | Tsung-Hao Huang v Takuya Kumasaka | 6-2,4-6,7-6 |
| ITF M25 Tainan | 2023/08/15 02:00 | Seita Watanabe v Takuya Kumasaka | 3-6,6-4,2-6 |
| ITF M25 Sapporo | 2023/09/05 02:00 | Jumpei Yamasaki v Kousuke Ogura | 6-4,6-4 |
| ITF M25 Jakarta | 2023/08/15 04:20 | Sora Fukuda v Jumpei Yamasaki | 7-5,6-4 |
| ITF M25 Jakarta | 2023/08/08 02:30 | Jeamoon Lee v Jumpei Yamasaki | 6-0,7-5 |
| ITF M25 Daegu | 2023/06/09 02:55 | Jumpei Yamasaki v Dominik Palan | 4-6,2-6 |
| ITF M25 Daegu | 2023/06/06 03:10 | Duckhee Lee v Jumpei Yamasaki | 1-6,6-4,4-6 |
| ITF M15 Karuizawa | 2023/06/03 03:30 | Sanhui Shin v Jumpei Yamasaki | 6-3,7-6 |
| ITF M15 Karuizawa | 2023/06/01 02:40 | Jumpei Yamasaki v Takuya Kumasaka | 6-3,6-2 |
| ITF M15 Karuizawa | 2023/05/31 01:00 | Jumpei Yamasaki v Seita Watanabe | 6-4,6-4 |