Stadium: Center Court A Round: 25 Ground: Hardcourt outdoor
| ITF M25 Hong Kong | 2023/08/29 02:00 | Hikaru Shiraishi v Justin Barki | 6-7,7-6,3-6 |
| ITF M25 Hong Kong | 2023/08/28 02:00 | Hikaru Shiraishi v Anthony Susanto | 6-2,6-4 |
| ITF M15 Nakhon Si Thammarat | 2023/07/08 02:00 | Ryuki Matsuda v Hikaru Shiraishi | 6-2,3-6,6-4 |
| ITF M15 Nakhon Si Thammarat | 2023/07/07 02:00 | Hikaru Shiraishi v Yurii Dzhavakian | 6-2,7-5 |
| ITF M15 Nakhon Si Thammarat | 2023/07/06 03:00 | Hikaru Shiraishi v Patrik Oplustil | 6-3,3-6,6-3 |
| ITF M15 Karuizawa | 2023/06/03 03:30 | Yuta Kawahashi v Hikaru Shiraishi | 7-5,1-6,10-7 |
| ITF M15 Karuizawa | 2023/06/01 01:45 | Ryotaro Matsumura v Hikaru Shiraishi | 4-6,2-6 |
| ITF M15 Karuizawa | 2023/05/31 01:00 | Toru Horie v Hikaru Shiraishi | 4-6,6-4,4-6 |
| ITF M25 Sapporo | 2023/09/04 03:20 | Ryotaro Taguchi v Naoya Honda | 6-0,0-6,4-10 |
| ITF M25 Sapporo | 2023/09/03 01:00 | Ryotaro Taguchi v Camden Camacho | 6-1,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/08/28 07:10 | Ryotaro Taguchi v Seon Yong Han | 4-6,3-6 |
| ITF M15 Nakhon Si Thammarat Qual | 2023/08/27 10:00 | Ryotaro Taguchi v Songrit D Chanbubpha | 6-0,6-0 |
| ITF M15 Nakhon Si Thammarat | 2023/08/24 02:00 | Khumoyun Sultanov v Ryotaro Taguchi | 6-3,6-4 |
| ITF M15 Nakhon Si Thammarat | 2023/08/23 03:50 | Ryotaro Taguchi v Francois Musitelli | 6-4,6-4 |
| ITF M15 Nakhon Si Thammarat | 2023/08/21 05:25 | Ryotaro Taguchi v Chanon Phunsawat | 6-3,6-3 |
| ITF M15 Nakhon Si Thammarat | 2023/08/20 07:35 | Ryotaro Taguchi v Jordan Chiu | 2-6,6-3,10-3 |