Stadium: Court 5 Round: 44 Ground: Hardcourt outdoor
| ITF Guam F1 | 2015/05/30 04:20 | Kikuchi, Gengo v Ko Suzuki | 6-2,6-3 |
| ITF Japan F2 | 2018/03/11 04:00 | Kikuchi, Gengo v Sakai, Yuto | 2-6,2-6 |
| ITF Japan F1 | 2018/03/08 01:30 | Naoki Nakagawa v Kikuchi, Gengo | 7-5,7-6 |
| ITF Japan F1 | 2018/03/07 01:00 | Yu, Cheng-Yu v Kikuchi, Gengo | 5-7,5-7 |
| ITF Japan F1 | 2018/03/05 01:00 | Kikuchi, Gengo v Masaya Kobayashi | 6-2,7-5 |
| ITF Japan F1 | 2018/03/03 01:00 | Kikuchi, Gengo v Kureoka, Takuya | 6-4,7-6 |
| ITF Japan F8 | 2017/06/15 03:30 | Kikuchi, Gengo v Nagao, Katsuki | 6-2,6-2 |
| ITF Japan F8 | 2017/06/14 04:00 | Kikuchi, Gengo v Matsuo, Yuki | 6-0,6-4 |
| ITF Japan F7 | 2017/06/06 01:00 | Kikuchi, Gengo v Sora Fukuda | 2-6,2-6 |
| Challenger Kyoto Qual | 2018/02/19 01:30 | Ko Suzuki v Garanganga, Takanyi | 5-7,4-6 |
| Challenger Kyoto Qual | 2018/02/18 02:45 | Naoki Nakagawa v Ko Suzuki | 6-7,6-7 |
| Challenger Kyoto Qual | 2018/02/17 02:30 | Makoto Ochi v Ko Suzuki | 6-4,4-6,6-7 |
| ITF Malaysia F3 | 2017/10/31 01:30 | Hady Habib v Ko Suzuki | 6-2,6-4 |
| ITF Malaysia F3 | 2017/10/30 02:00 | Ko Suzuki v Mikalai Haliak | 6-3,6-4 |
| ITF Malaysia F3 | 2017/10/29 00:00 | Hung, Jui-Chen v Ko Suzuki | 1-6,4-6 |
| ITF Malaysia F3 | 2017/10/28 01:00 | Ko Suzuki v Grigoriy Lomakin | 6-1,6-1 |
| ITF Malaysia F2 | 2017/10/22 03:00 | Dijkhuizen, Marc v Ko Suzuki | 6-3,6-4 |