Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Yanagawa | 2023/12/20 02:30 | Taiyo Yamanaka v Yamato Sueoka | 6-2,4-6,6-10 |
| ITF M15 Yanagawa | 2023/12/18 01:00 | Taiyo Yamanaka v David Krasner | 6-4,7-6 |
| ITF M15 Kuching | 2023/11/17 02:00 | Taiyo Yamanaka v Luca Castelnuovo | 7-6,2-6,6-2 |
| ITF M15 Kuching | 2023/11/16 03:25 | Ren Nakamura v Taiyo Yamanaka | 1-6,0-6 |
| ITF M25 Cairns | 2023/10/10 23:50 | Daisuke Sumizawa v Taiyo Yamanaka | 6-2,6-2 |
| 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 M15 Yanagawa | 2023/12/26 00:30 | Hiroki Sakagawa v Shunsuke Nakagawa | 5-7,4-6 |
| ITF M15 Yanagawa | 2023/12/25 00:30 | Yusuke Kusuhara v Shunsuke Nakagawa | 4-6,2-6 |
| ITF M15 Yanagawa | 2023/12/18 01:00 | Shunsuke Nakagawa v Hong-Lin Fu | 4-6,6-7 |
| Challenger Matsuyama | 2023/11/08 02:35 | Taro Daniel v Shunsuke Nakagawa | 6-1,6-2 |
| ITF M25 Takasaki | 2023/09/18 03:10 | Collin Altamirano v Shunsuke Nakagawa | 6-3,6-2 |
| ITF M25 Takasaki | 2023/09/17 05:00 | Daiki Yoshimura v Shunsuke Nakagawa | 1-6,1-6 |
| ITF M25 Sapporo | 2023/09/11 00:50 | Ryotaro Taguchi v Shunsuke Nakagawa | 6-2,6-2 |
| ITF M25 Sapporo | 2023/09/10 01:00 | Kenta Nakamura v Shunsuke Nakagawa | 4-6,2-6 |