Stadium: Court Center Round: 45
| ITF Japan F6 Qual | 2017/05/27 01:00 | Yuichiro Inui v Daisuke Sumizawa | 2-6,3-6 |
| ITF M15 Anning | 2018/12/31 01:30 | Daisuke Sumizawa v Baoluo Zheng | 6-2,7-6 |
| ITF Kuwait F2 | 2018/11/10 07:45 | Peter Heller v Daisuke Sumizawa | 6-3,6-4 |
| ITF Kuwait F2 | 2018/11/09 07:15 | Ergi Kirkin v Daisuke Sumizawa | 2-6,3-6 |
| ITF Kuwait F2 | 2018/11/07 08:20 | Daisuke Sumizawa v Jose Fco. Vidal Azorin | 7-6,6-3 |
| ITF Kuwait F2 | 2018/11/05 08:45 | Daisuke Sumizawa v Marc Dijkhuizen | 3-6,6-4,6-2 |
| ITF Kuwait F2 | 2018/11/04 08:20 | Mousa Alkotop v Daisuke Sumizawa | 4-6,6-7 |
| ITF Kuwait F2 | 2018/11/03 11:00 | Francis Pare v Daisuke Sumizawa | 3-6,1-6 |
| ITF Thailand F6 | 2018/10/09 07:45 | Tsung-Hao Huang v Daisuke Sumizawa | 6-2,6-3 |
| ITF M15 Anning | 2018/12/31 01:30 | Zhuoyang Qiu v Yuichiro Inui | 0-6,2-6 |
| ITF Kuwait F3 | 2018/11/12 09:20 | Yuichiro Inui v Roy Sarut De Valk | 6-7,2-6 |
| ITF Kuwait F3 | 2018/11/11 09:15 | Yuichiro Inui v Hussain Han Kuw Shams | 6-1,6-1 |
| ITF Kuwait F3 | 2018/11/10 11:40 | Yuichiro Inui v Yanik Kaelin | 6-4,6-4 |
| ITF Kuwait F2 | 2018/11/06 07:30 | Yuichiro Inui v Kai Wehnelt | 6-4,5-7,4-6 |
| ITF Kuwait F2 | 2018/11/03 09:00 | Yuichiro Inui v Salman Alhassani | 6-0,6-0 |
| ITF Tunisia F35 | 2018/10/10 09:00 | Antoine Bellier v Yuichiro Inui | 6-2,6-4 |
| ITF Tunisia F34 | 2018/10/03 08:30 | Duje Ajdukovic v Yuichiro Inui | 6-2,6-7,7-6 |