Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Sapporo | 2023/09/05 04:55 | Hikaru Shiraishi v Ryotaro Taguchi | 4-6,6-4,0-6 |
| 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 M25 Sapporo | 2023/09/12 02:00 | Naoki Tajima v Tatsuma Ito | 3-6,1-6 |
| ITF M25 Sapporo | 2023/09/07 03:00 | Ryotaro Matsumura v Tatsuma Ito | 7-6,6-4 |
| ITF M25 Sapporo | 2023/09/06 03:35 | Seita Watanabe v Tatsuma Ito | 6-4,4-6,4-6 |
| ITF M25 Hong Kong | 2023/08/30 02:00 | Kasidit Samrej v Tatsuma Ito | 6-1,6-4 |
| Challenger Winnipeg | 2023/08/14 16:00 | Kiranpal Pannu v Tatsuma Ito | 7-5,4-6,6-1 |
| Challenger Winnipeg | 2023/08/13 16:00 | Keegan Rice v Tatsuma Ito | 4-6,5-7 |
| Challenger Cary | 2023/08/06 14:00 | Fons Van Sambeek v Tatsuma Ito | 7-6,1-6,6-3 |
| ITF M15 Karuizawa | 2023/06/04 02:00 | Yuta Kawahashi v Tatsuma Ito | 7-5,6-2 |