Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ATP Auckland | 2020/01/10 22:00 | Shuichi Sekiguchi v Tatsuma Ito | 3-6,6-4,4-6 |
| Challenger Chengdu | 2019/08/02 09:15 | Shuichi Sekiguchi v Tatsuma Ito | 2-6,1-6 |
| Challenger Kyoto | 2017/02/21 01:30 | Tatsuma Ito v Shuichi Sekiguchi | 6-2,6-3 |
| Challenger Nanchang | 2016/09/12 02:00 | Tatsuma Ito v Shuichi Sekiguchi | 6-3,1-6,7-6 |
| 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 |
| Challenger Burnie | 2023/02/01 00:25 | Adam Walton v Shuichi Sekiguchi | 6-3,6-2 |
| ITF M25 Tsukuba | 2023/03/31 01:00 | Tatsuma Ito v Sho Shimabukuro | 4-6,2-6 |
| ITF M25 Tsukuba | 2023/03/30 02:45 | Rimpei Kawakami v Tatsuma Ito | 6-1,1-6,0-6 |
| ITF M25 Tsukuba | 2023/03/28 07:55 | Tatsuma Ito v Keisuke Saitoh | 4-6,7-5,6-2 |
| ITF M25 Canberra | 2023/03/23 05:30 | Hans C B Gonzalez v Tatsuma Ito | 2-6,1-6 |
| ITF M25 Canberra | 2023/03/22 01:35 | Ethan Cook v Tatsuma Ito | 4-6,6-7 |
| ITF M25 Canberra | 2023/03/19 02:00 | Tatsuma Ito v Marc Polmans | 0-6,6-4,4-6 |
| ITF M25 Canberra | 2023/03/18 01:30 | Yuki Mochizuki v Tatsuma Ito | 3-6,7-6,3-6 |
| ITF M25 Canberra | 2023/03/16 23:00 | Colin Sinclair v Tatsuma Ito | 4-6,4-6 |