Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Nakhon Si Thammarat | 2023/07/05 06:20 | Shuichi Sekiguchi v Credit Chaiyarin | 6-2,6-4 |
| ITF M15 Jakarta | 2023/06/28 05:45 | Moerani Bouzige v Shuichi Sekiguchi | 7-5,6-3 |
| ITF M15 Jakarta | 2023/06/23 02:00 | Fitriadi M Rifqi v Shuichi Sekiguchi | 0-6,6-3,7-6 |
| ITF M15 Jakarta | 2023/06/21 04:25 | Tegar A S Wibowo v Shuichi Sekiguchi | 0-6,0-6 |
| 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 Nakhon Si Thammarat | 2023/07/05 02:00 | Yuttana Charoenphon v Taisei Ichikawa | 4-6,6-7 |
| ITF - M15 Nakhon Si Thammarat | 2023/07/03 02:00 | Taisei Ichikawa v Tai Leonard Sach | 6-3,6-1 |
| ITF - M15 Nakhon Si Thammarat | 2023/07/02 05:50 | Taisei Ichikawa v Raghav Jaisinghani | 6-3,6-4 |
| ITF - M25 Anseong | 2023/06/23 02:00 | Taisei Ichikawa v Gerard Campana Lee | 6-7,0-6 |
| ITF - M25 Anseong | 2023/06/22 05:10 | Taisei Ichikawa v Jangjun Kim | 6-4,6-1 |
| ITF - M25 Anseong | 2023/06/20 03:55 | Makoto Ochi v Taisei Ichikawa | 2-6,6-7 |
| ITF - M25 Changwon | 2023/06/15 03:30 | Taisei Ichikawa v Dominik Palan | 1-6,3-6 |
| ITF - M25 Changwon | 2023/06/13 01:00 | Taisei Ichikawa v Min Seong Kim | 6-2,6-1 |