Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Sapporo | 2023/09/15 00:55 | Koki Matsuda v Daisuke Sumizawa | 6-0,7-6 |
| ITF M25 Gold Coast | 2023/11/29 01:55 | Daisuke Sumizawa v Matthew Dellavedova | 6-7,4-6 |
| ITF M25 Brisbane | 2023/11/22 03:50 | Daisuke Sumizawa v Emile Hudd | 2-6,2-6 |
| ITF M25 Cairns | 2023/10/12 00:00 | Omar Jasika v Daisuke Sumizawa | 6-1,6-2 |
| ITF M25 Cairns | 2023/10/10 23:50 | Daisuke Sumizawa v Taiyo Yamanaka | 6-2,6-2 |
| ITF M25 Cairns | 2023/10/06 02:25 | Daisuke Sumizawa v Ajeet Rai | 6-4,5-7,2-6 |
| ITF M25 Cairns | 2023/10/05 02:45 | Daisuke Sumizawa v Kody Pearson | 6-2,1-6,6-4 |
| ITF M25 Cairns | 2023/10/04 03:15 | Daisuke Sumizawa v Corban Crowther | 7-6,4-6,6-1 |
| ITF M25 Takasaki | 2023/09/21 03:15 | Naoki Nakagawa v Daisuke Sumizawa | 7-5,6-4 |
| ITF M15 Yanagawa | 2023/12/20 02:30 | Koki Matsuda v Hong-Lin Fu | 6-4,6-4 |
| ITF M15 Yanagawa | 2023/12/18 01:00 | Koki Matsuda v Kai-I Wang | 6-4,7-6 |
| Challenger Yokkaichi | 2023/11/26 01:00 | Koki Matsuda v James Trotter | 1-6,1-6 |
| ITF M25 Mumbai | 2023/11/22 07:15 | Aryan Shah v Koki Matsuda | 6-3,7-5 |
| ITF M25 Hua Hin | 2023/11/16 03:00 | Koki Matsuda v Jie Cui | 6-2,2-6,2-6 |
| ITF M25 Hua Hin | 2023/11/15 02:50 | Koki Matsuda v Krittin Koaykul | 6-2,7-5 |
| Challenger Playford | 2023/10/23 02:25 | Jayden Court v Koki Matsuda | 7-5,7-6 |
| Challenger Playford | 2023/10/22 04:15 | Koki Matsuda v Kody Pearson | 6-4,7-6 |