Stadium: Court 8 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Caloundra | 2023/08/01 04:45 | Daisuke Sumizawa v Taiyo Yamanaka | 4-6,6-3,7-6 |
| 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 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 Cairns | 2023/10/05 03:35 | Taiyo Yamanaka v Jake Delaney | 4-6,1-6 |
| ITF M25 Cairns | 2023/10/04 01:45 | Taisei Ichikawa v Taiyo Yamanaka | 2-6,1-6 |
| ITF M25 Darwin | 2023/09/21 06:30 | Taiyo Yamanaka v Scott Jones | 6-2,1-6,6-7 |
| ITF M25 Darwin | 2023/09/19 09:25 | Jacob Brumm v Taiyo Yamanaka | 5-7,4-6 |
| ITF M25 Darwin | 2023/09/14 05:25 | Taiyo Yamanaka v Jeremy Beale | 6-7,2-6 |
| ITF M25 Darwin | 2023/09/13 05:30 | Taiyo Yamanaka v Timmy Karpinski | 4-6,6-4,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/09/05 03:40 | Jacob Bradshaw v Taiyo Yamanaka | 2-6,6-3,7-6 |
| ITF M15 Nakhon Si Thammarat | 2023/08/30 08:30 | Taiyo Yamanaka v Thantub Suksumrarn | 2-6,3-6 |