Estádio: Court 2 Round: 25 Ground: Clay
| ITF - M15 Anning | 2018/12/31 05:00 | Daisuke Sumizawa v Yuichiro Inui | 4-6,2-6 |
| ITF - Japão F6 - Qualificação | 2017/05/27 01:00 | Yuichiro Inui v Daisuke Sumizawa | 2-6,3-6 |
| ITF - M25 Luan | 2019/05/15 06:30 | Daisuke Sumizawa v Jie Cui | 4-6,2-6 |
| ITF - M25 Luan | 2019/05/14 02:00 | Daisuke Sumizawa v Ruikai Ruikai Wang | 6-4,6-3 |
| ITF - M25 Wuhan | 2019/05/09 03:10 | Yan Bai v Daisuke Sumizawa | 6-3,6-1 |
| ITF - M25 Wuhan | 2019/05/08 03:30 | Ray Ho v Daisuke Sumizawa | 6-7,3-6 |
| ITF - M25 Wuhan | 2019/05/07 02:00 | Weiqiang Zheng v Daisuke Sumizawa | 6-2,6-7,7-10 |
| ITF - M25 Matsuyama | 2019/04/09 01:00 | Daisuke Sumizawa v Kazuki Shimizu | 6-3,4-6,6-10 |
| ITF - M15 Kashiwa | 2019/04/01 00:00 | Daisuke Sumizawa v Kazuki Nishiwaki | 6-2,2-6,8-10 |
| ITF - M15 Mornington | 2019/03/25 23:00 | Daisuke Sumizawa v Stefan Skadarka | 6-3,6-7,7-10 |
| ITF - M15 Tabarka | 2019/05/23 10:00 | Yuichiro Inui v Mohamed Aziz Dougaz | 5-7,1-6 |
| ITF - M15 Tabarka | 2019/05/21 11:10 | Nicolas Tepmahc v Yuichiro Inui | 6-4,1-6,3-6 |
| ITF - M15 Tabarka | 2019/05/20 12:30 | Yuichiro Inui v Ashwin R Sharma | 6-4,4-6,10-7 |
| ITF - M15 Tabarka | 2019/05/15 09:20 | Yuichiro Inui v Alessandro Ingarao | 2-6,3-6 |
| ITF - M15 Tabarka | 2019/05/07 08:30 | Darko Bojanovic v Yuichiro Inui | 6-4,7-6 |
| ITF - M25 Matsuyama | 2019/04/08 01:00 | Kazuki Shimizu v Yuichiro Inui | 6-2,6-0 |
| ITF - M15 Kashiwa | 2019/04/01 00:00 | Yuichiro Inui v Gengo Kikuchi | 4-6,2-6 |
| ITF - M15 Mornington | 2019/03/26 23:00 | Yuichiro Inui v Stefan Skadarka | 3-6,3-6 |