Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| 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 Yanagawa | 2023/12/20 07:45 | Daisuke Sumizawa v Koki Matsuda | 5-7,3-6 |
| ITF M15 Kashiwa | 2024/03/31 01:00 | Kenta Nakamura v Naoki Tajima | 2-6,2-6 |
| ITF M15 Tsukuba | 2024/03/24 01:00 | Ryotaro Shimomura v Naoki Tajima | 6-3,1-6,10-5 |
| ITF M25 Swan Hill | 2024/03/19 03:00 | Naoki Tajima v Jesse Delaney | 5-7,6-2,4-6 |
| ITF M25 Mildura | 2024/03/11 23:50 | Naoki Tajima v Sam Oster | 6-3,3-6,6-10 |
| ITF M25 Mildura | 2024/03/10 22:30 | Naoki Tajima v Duncan McCall | 6-4,6-2 |
| ITF M25 Traralgon | 2024/02/27 01:30 | Naoki Tajima v Luke Sorensen | 7-6,5-7,10-7 |
| ITF M25 Traralgon | 2024/02/26 01:30 | Naoki Tajima v Benjamin Loccisano | 6-0,6-0 |
| ITF M25 Traralgon | 2024/02/19 01:30 | Naoki Tajima v Adrian Arcon | 3-6,2-6 |