Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Caloundra | 2023/07/28 01:00 | Daisuke Sumizawa v Thomas Fancutt | 6-3,6-7,3-6 |
| ITF M15 Caloundra | 2023/07/27 04:40 | Daisuke Sumizawa v Luke Sorensen | 6-4,6-3 |
| ITF M15 Caloundra | 2023/07/25 04:05 | Daisuke Sumizawa v Kazuki Nishiwaki | 6-1,6-2 |
| ITF M15 Jakarta | 2023/06/28 02:00 | Yurii Dzhavakian v Daisuke Sumizawa | 2-6,6-4,6-2 |
| ITF M25 Anseong | 2023/06/23 03:25 | Daisuke Sumizawa v Sanhui Shin | 3-6,4-6 |
| ITF M25 Anseong | 2023/06/22 04:00 | Daisuke Sumizawa v Takuya Kumasaka | 7-5,7-6 |
| 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 Caloundra | 2023/07/25 03:45 | Taiyo Yamanaka v Casey Hoole | 2-6,5-7 |
| ITF M15 Brcko | 2023/05/22 07:30 | Taiyo Yamanaka v Timothy Gray | 6-4,6-4 |
| ITF M15 Prijedor | 2023/05/18 08:45 | Igor Gimenez v Taiyo Yamanaka | 6-4,4-6,10-5 |
| ITF M15 Doboj | 2023/05/10 14:30 | Marat Sharipov v Taiyo Yamanaka | 6-3,6-2 |
| ITF M15 Doboj | 2023/05/09 08:00 | Taiyo Yamanaka v Radomir Tomic | 2-6,6-7 |
| ITF M15 Doboj | 2023/05/08 08:00 | Taiyo Yamanaka v Federico Mirgone | 6-0,6-0 |
| ITF M25 Kashiwa | 2023/04/03 01:00 | Renta Tokuda v Taiyo Yamanaka | 6-0,7-5 |
| ITF M25 Kashiwa | 2023/04/02 00:30 | Ko Suzuki v Taiyo Yamanaka | 1-6,6-3,11-13 |