Stadium: Court 4 Round: 28 Ground: Clay
| ITF Japan F2 | 2015/03/17 05:25 | Ko Suzuki v Soichiro Moritani | 6-3,3-6,2-6 |
| ITF M15 Karuizawa | 2019/05/31 01:00 | Ko Suzuki v Goran Markovic | 6-1,6-4 |
| ITF M15 Karuizawa | 2019/05/30 06:00 | Jordi Samper-Montana v Ko Suzuki | 4-6,6-0,6-7 |
| ITF M15 Karuizawa | 2019/05/28 05:35 | Yuta Kikuchi v Ko Suzuki | 2-6,6-3,4-6 |
| ITF Japan F7 Qual | 2018/06/03 03:10 | Tomohiro Masabayashi v Ko Suzuki | 5-7,7-6,6-4 |
| ITF Japan F7 Qual | 2018/06/02 03:00 | Ko Suzuki v Yuki Matsuo | 5-7,6-0,6-4 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | Kaito Uesugi v Ko Suzuki | 7-6,6-4 |
| ITF Japan F5 | 2018/04/01 00:30 | Ko Suzuki v Kazuma Kawachi | 4-6,4-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Yuichi Ito v Ko Suzuki | 6-7,2-6 |
| ITF M15 Karuizawa | 2019/05/31 01:00 | Kento Takeuchi v Soichiro Moritani | 3-6,3-6 |
| ITF M15 Karuizawa | 2019/05/30 01:00 | Daisuke Sumizawa v Soichiro Moritani | 2-6,6-4,6-7 |
| ITF M15 Karuizawa | 2019/05/28 02:30 | Tomohiro Masabayashi v Soichiro Moritani | 3-6,3-6 |
| ITF M15 Nishi-Tama | 2019/03/06 01:00 | Soichiro Moritani v Keisuke Saitoh | 2-6,0-6 |
| ITF M15 Anning | 2019/01/11 05:10 | Soichiro Moritani v Shao-Fan Liu | 7-5,3-6,3-6 |
| ITF M15 Anning | 2019/01/10 03:45 | Soichiro Moritani v Kento Takeuchi | 2-6,6-3,7-5 |
| ITF M15 Anning | 2019/01/09 07:30 | Sora Fukuda v Soichiro Moritani | 3-6,2-6 |
| ITF M15 Anning | 2019/01/01 03:30 | Nitin Kumar Sinha v Soichiro Moritani | 6-1,6-7,6-3 |