Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Kashiwa | 2023/04/05 04:30 | Shuichi Sekiguchi v Tatsuma Ito | 4-6,6-3,7-5 |
| ITF M25 Lucknow | 2023/03/22 04:00 | Shuichi Sekiguchi v Karan Singh | 3-6,4-6 |
| ITF M25 New Delhi | 2023/03/16 05:30 | Yunseok Jang v Shuichi Sekiguchi | 2-6,7-5,6-3 |
| ITF M25 New Delhi | 2023/03/15 09:55 | Woobin Shin v Shuichi Sekiguchi | 7-5,5-7,3-6 |
| ITF M15 Aktobe | 2023/03/02 09:25 | Federico Bertuccioli v Shuichi Sekiguchi | 7-6,4-6,4-4 |
| ITF M15 Aktobe | 2023/03/01 09:55 | Adrian Oetzbach v Shuichi Sekiguchi | 3-6,4-6 |
| ITF M25 Burnie | 2023/02/09 00:50 | Adam Walton v Shuichi Sekiguchi | 6-1,6-7,7-6 |
| ITF M25 Burnie | 2023/02/08 04:00 | Shuichi Sekiguchi v Corey Gaal | 6-2,7-5 |
| ITF M25 Jakarta | 2023/04/12 02:00 | Tristan Schoolkate v Taisei Ichikawa | 4-6,6-2,6-4 |
| ITF M25 Jakarta | 2023/04/11 02:00 | Taisei Ichikawa v Andrew Rogers | 2-6,7-6,11-9 |
| ITF M25 Jakarta | 2023/04/10 04:30 | Taisei Ichikawa v Patrik Oplustil | 6-2,6-3 |
| ITF M25 Kashiwa | 2023/04/03 05:05 | Taisei Ichikawa v Hikaru Shiraishi | 4-6,2-6 |
| ITF M25 Kashiwa | 2023/04/02 04:00 | Taisei Ichikawa v Yamato Sueoka | 6-0,7-6 |
| ITF M25 Canberra | 2023/03/23 05:30 | Matthew Dellavedova v Taisei Ichikawa | 6-1,3-6,6-3 |
| ITF M25 Canberra | 2023/03/21 01:30 | Taisei Ichikawa v Lawrence Sciglitano | 6-3,6-3 |
| ITF M25 Canberra | 2023/03/15 23:00 | Taisei Ichikawa v Yuki Mochizuki | 6-7,3-6 |