Stadium: Centre Court A Round: 28 Ground: Hardcourt outdoor
| ITF M25 Hongkong | 2019/06/08 03:00 | Yuki Mochizuki v Shuichi Sekiguchi | 3-6,6-7 |
| ITF M15 Nishitōkyō | 2019/03/14 03:45 | Shuichi Sekiguchi v Yuki Mochizuki | 6-2,6-1 |
| ITF Japan F6 | 2017/05/29 05:55 | Yuki Mochizuki v Shuichi Sekiguchi | 3-6,4-6 |
| ITF M25 Sapporo | 2022/09/02 01:50 | Yuki Mochizuki v Yamato Sueoka | 6-2,6-1 |
| ITF M25 Sapporo | 2022/09/01 01:00 | Yuki Mochizuki v Taisei Ichikawa | 6-0,6-7,6-2 |
| ITF M15 Jakarta | 2022/08/20 02:00 | Mukund Sasikumar v Yuki Mochizuki | 6-3,1-6,6-4 |
| ITF M15 Jakarta | 2022/08/19 02:00 | Yuki Mochizuki v Ajeet Rai | 6-4,6-0 |
| ITF M15 Jakarta | 2022/08/18 02:00 | Yuki Mochizuki v Alexander Kotzen | 6-1,6-4 |
| ITF M15 Jakarta | 2022/08/17 02:00 | Yuki Mochizuki v Thanapet Chanta | 7-6,6-3 |
| ITF M15 Jakarta | 2022/08/12 02:00 | Yuta Shimizu v Yuki Mochizuki | 7-5,6-4 |
| ITF M15 Jakarta | 2022/08/11 03:35 | Alexander Crnokrak v Yuki Mochizuki | 4-6,2-6 |
| ITF M25 Sapporo | 2022/09/02 01:00 | Shuichi Sekiguchi v Daisuke Sumizawa | 7-6,7-6 |
| ITF M25 Sapporo | 2022/09/01 05:30 | Shuichi Sekiguchi v Kento Takeuchi | 6-2,6-4 |
| ITF M25 Sapporo | 2022/09/01 01:00 | Shuichi Sekiguchi v Yusuke Takahashi | 6-1,6-7,6-2 |
| ITF M15 Changwon | 2022/08/24 05:55 | Geni Inoue v Shuichi Sekiguchi | 3-6,6-3,6-4 |
| ITF M15 Fountain Valley | 2022/07/09 19:40 | Zachary Svajda v Shuichi Sekiguchi | 4-6,6-1,6-0 |
| ITF M15 Fountain Valley | 2022/07/08 16:50 | Yuta Kikuchi v Shuichi Sekiguchi | 6-7,4-6 |
| ITF M15 Fountain Valley | 2022/07/07 16:55 | Austin Ansari v Shuichi Sekiguchi | 6-2,1-6,1-6 |
| ITF M15 Fountain Valley | 2022/07/06 18:45 | Jacob Bullard v Shuichi Sekiguchi | 3-6,3-6 |