Stadion: Court 3 Round: 26 Ground: Clay
| ITF - M25 - Anseong | 2023/06/21 04:10 | Daisuke Sumizawa v Ko Suzuki | 7-5,6-3 |
| ITF - M25 - Nakhon Si Thammarat | 2023/06/15 03:25 | Orel Kimhi v Daisuke Sumizawa | 6-1,6-3 |
| ITF - M15 - Nakhon Si Thammarat | 2023/06/07 03:30 | Daisuke Sumizawa v Maximus Jones | 1-6,2-6 |
| ITF - M15 - Karuizawa | 2023/06/01 00:30 | Sora Fukuda v Daisuke Sumizawa | 6-3,6-4 |
| ITF - M15 - Karuizawa | 2023/05/30 07:35 | Taketo Takamisawa v Daisuke Sumizawa | 2-6,4-6 |
| Challenger - Busan | 2023/05/08 02:00 | Daisuke Sumizawa v Woobin Shin | 6-2,3-6,2-6 |
| Challenger - Gwangju | 2023/04/30 04:10 | Daniel Masur v Daisuke Sumizawa | 6-0,6-4 |
| ITF - M25 - Kashiwa | 2023/04/06 01:30 | Daisuke Sumizawa v Yunseong Chung | 2-6,2-6 |
| ITF - M25 - Anseong | 2023/06/21 02:00 | Takuya Kumasaka v Daiki Yoshimura | 6-2,6-0 |
| ITF - M25 - Daegu | 2023/06/10 00:55 | Uisung Park v Takuya Kumasaka | 6-4,6-0 |
| ITF - M25 - Daegu | 2023/06/09 01:00 | Yuki Mochizuki v Takuya Kumasaka | 7-6,4-6,2-6 |
| ITF - M25 - Daegu | 2023/06/06 00:50 | Takuya Kumasaka v Makoto Ochi | 6-3,6-1 |
| ITF - M15 - Karuizawa | 2023/06/01 02:40 | Jumpei Yamasaki v Takuya Kumasaka | 6-3,6-2 |
| ITF - M15 - Antalya | 2023/04/26 09:15 | Takuya Kumasaka v Marlon Vankan | 4-6,0-6 |
| ITF - M15 - Antalya | 2023/04/18 09:10 | Takuya Kumasaka v Konstantin Zhzhenov | 3-6,6-4,7-10 |
| ITF - M15 - Antalya | 2023/04/17 10:20 | Takuya Kumasaka v Gino Romano | 6-3,6-1 |