Stadium: Court 9 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Yanagawa | 2023/12/20 07:45 | Daisuke Sumizawa v Koki Matsuda | 5-7,3-6 |
| ITF M25 Sapporo | 2023/09/15 00:55 | Koki Matsuda v Daisuke Sumizawa | 6-0,7-6 |
| ITF M15 Kashiwa | 2024/04/01 02:40 | Daisuke Sumizawa v Naoki Tajima | 4-6,6-1,10-8 |
| ITF M15 Kashiwa | 2024/03/31 01:00 | Daisuke Sumizawa v Tomohiro Masabayashi | 6-4,6-7,10-5 |
| ITF M15 Tsukuba | 2024/03/28 04:15 | Daisuke Sumizawa v Stefanos Sakellaridis | 3-6,6-3,1-6 |
| ITF M15 Tsukuba | 2024/03/27 04:15 | Ryotaro Shimomura v Daisuke Sumizawa | 6-4,3-6,4-6 |
| ITF M15 Tsukuba | 2024/03/25 06:00 | Daisuke Sumizawa v Masamichi Imamura | 6-3,6-4 |
| ITF M15 Tsukuba | 2024/03/24 01:00 | Daisuke Sumizawa v Linghao Zhang | 7-5,6-1 |
| ITF M15 Hinode | 2024/03/13 05:40 | Hikaru Shiraishi v Daisuke Sumizawa | 6-1,7-6 |
| UTR Pro Kawaguchi | 2024/03/02 03:00 | Ryotaro Matsumura v Daisuke Sumizawa | 6-2,7-5 |
| ITF M15 Kashiwa | 2024/04/01 05:40 | Yeongseok Jeong v Koki Matsuda | 6-7,5-7 |
| ITF M15 Kashiwa | 2024/03/31 01:00 | Ko Suzuki v Koki Matsuda | 3-6,5-7 |
| ITF M15 Tsukuba | 2024/03/25 06:00 | Ryotaro Taguchi v Koki Matsuda | 7-6,6-2 |
| ITF M15 Tsukuba | 2024/03/24 01:00 | Seon Yong Han v Koki Matsuda | 4-6,4-6 |
| ITF M15 Nishi-Tokyo | 2024/03/20 06:50 | Koki Matsuda v Stefanos Sakellaridis | 7-5,6-7,4-6 |
| ITF M15 Nishi-Tokyo | 2024/03/18 01:00 | Nico Hornitschek v Koki Matsuda | 2-6,3-6 |
| ITF M15 Hinode | 2024/03/13 02:00 | Linang Xiao v Koki Matsuda | 6-3,6-7,7-6 |
| ITF M15 Hinode | 2024/03/11 04:30 | Koki Matsuda v Issei Okamura | 6-4,6-3 |