Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF M25 - Anseong | 2023/06/22 04:00 | Daisuke Sumizawa v Takuya Kumasaka | 7-5,7-6 |
| ITF M25 - Sapporo | 2023/09/12 05:40 | Takuya Kumasaka v Koki Matsuda | 0-6,2-6 |
| ITF M25 - Sapporo | 2023/09/06 00:55 | Yuichiro Inui v Takuya Kumasaka | 3-6,4-6 |
| ITF M25 - HongKong | 2023/09/03 02:00 | Takuya Kumasaka v Kasidit Samrej | 3-6,6-1,5-10 |
| ITF M25 - HongKong | 2023/08/31 02:00 | Tsung-Hao Huang v Takuya Kumasaka | 6-1,2-6,1-6 |
| ITF M25 - HongKong | 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 - Sapporo | 2023/09/15 00:55 | Koki Matsuda v Daisuke Sumizawa | 6-0,7-6 |
| ITF M25 - Sapporo | 2023/09/13 01:00 | Daisuke Sumizawa v Yunseok Jang | 6-3,6-4 |
| ITF M25 - Sapporo | 2023/09/10 02:00 | Shuichi Sekiguchi v Daisuke Sumizawa | 6-1,6-4 |
| ITF M25 - Sapporo | 2023/09/09 01:55 | Sora Fukuda v Daisuke Sumizawa | 4-6,4-6 |
| ITF M25 - Sapporo | 2023/09/08 04:45 | Daisuke Sumizawa v Ko Suzuki | 7-5,6-2 |
| ITF M25 - Sapporo | 2023/09/07 01:00 | Tomohiro Masabayashi v Daisuke Sumizawa | 3-6,3-6 |
| ITF M25 - HongKong | 2023/08/30 04:10 | Egor Gerasimov v Daisuke Sumizawa | 4-6,6-3,7-5 |
| ITF M25 - HongKong | 2023/08/28 02:00 | Daisuke Sumizawa v David Agung Susanto | 6-2,6-2 |