Stadium: Court 5 Round: 54 Ground: Clay
| ITF Japan F3 | 2018/03/20 06:00 | Tung-Lin Wu v Gengo Kikuchi | 6-2,6-3 |
| ITF Japan F3 | 2018/03/18 01:00 | Gengo Kikuchi v Kousuke Ogura | 6-3,6-2 |
| ITF Japan F3 | 2018/03/17 02:30 | Gengo Kikuchi v Ko Suzuki | 6-2,3-6,6-3 |
| ITF Japan F2 | 2018/03/11 04:00 | Gengo Kikuchi v Yuto Sakai | 2-6,2-6 |
| ITF Japan F1 | 2018/03/08 01:30 | Naoki Nakagawa v Gengo Kikuchi | 7-5,7-6 |
| ITF Japan F1 | 2018/03/07 01:00 | Cheng-Yu Yu v Gengo Kikuchi | 5-7,5-7 |
| ITF Japan F1 | 2018/03/05 01:00 | Gengo Kikuchi v Masaya Kobayashi | 6-2,7-5 |
| ITF Japan F1 | 2018/03/03 01:00 | Gengo Kikuchi v Takuya Kureoka | 6-4,7-6 |
| ITF Turkey F11 | 2018/03/18 07:00 | Marc Fornell-Mestres v Daisuke Sumizawa | 6-4,6-4 |
| ITF Turkey F11 | 2018/03/17 08:30 | Samuel Bothwell v Daisuke Sumizawa | 0-6,4-6 |
| ITF Turkey F10 | 2018/03/10 08:30 | Gabriel Donev v Daisuke Sumizawa | 6-3,6-3 |
| ITF Turkey F9 | 2018/03/04 08:30 | Daisuke Sumizawa v Neven Krivokuca | 1-6,2-6 |
| ITF Turkey F9 | 2018/03/03 07:00 | Daisuke Sumizawa v Nutdanai Sincharoenwattana | 6-1,7-6 |
| ITF Turkey F8 | 2018/02/25 07:30 | Bogdan Ionut Apostol v Daisuke Sumizawa | 7-6,6-7,6-0 |
| ITF Turkey F8 | 2018/02/24 07:00 | Daisuke Sumizawa v Vicente O Moratalla | 6-7,7-5,6-2 |
| ITF Turkey F7 | 2018/02/17 06:30 | Daisuke Sumizawa v Calin Manda | 2-6,0-6 |