Stadium: Court 5 Round: 26 Ground: Clay
| ITF M25 Matsuyama | 2019/04/09 02:50 | Gage Brymer v Ken Onishi | 7-6,6-2 |
| ITF M15 Tsukuba | 2019/03/25 01:00 | Ryuki Matsuda v Ken Onishi | 6-2,6-3 |
| ITF M15 Kofu | 2019/03/18 00:30 | Mick Veldheer v Ken Onishi | 7-5,6-2 |
| ITF M15 Sharm El Sheikh | 2019/03/11 08:00 | Ken Onishi v George Tsivadze | 3-6,6-2,8-10 |
| ITF M15 Sharm El Sheikh | 2019/03/06 12:35 | Ken Onishi v George Tsivadze | 3-6,6-2,3-6 |
| ITF Pakistan F3 | 2018/12/17 05:30 | Ken Onishi v Lorenzo Bocchi | 6-7,3-6 |
| ITF Czech Republic F4 Qual | 2018/06/23 08:00 | Ken Onishi v Samuel Puskar | 3-6,3-6 |
| ITF Hungary F4 | 2018/06/12 11:25 | Patricio Heras v Ken Onishi | 3-6,6-3,6-1 |
| ITF M15 Cairo | 2019/04/20 08:00 | Mathieu Perchicot v Pol Toledo Bague | 5-7,7-6,2-6 |
| ITF M15 Cairo | 2019/04/19 08:00 | Benjamin Dhoe v Mathieu Perchicot | 3-6,1-6 |
| ITF M15 Cairo | 2019/04/18 09:35 | Ranjeet Virali-Murugesan v Mathieu Perchicot | 0-6,3-6 |
| ITF M15 Cairo | 2019/04/17 13:50 | Vignesh Peranamallur v Mathieu Perchicot | 1-6,3-6 |
| ITF M15 Tabarka | 2019/04/10 16:35 | Mathieu Perchicot v Kristjan Tamm | 6-7,7-6,4-6 |
| ITF M15 Tabarka | 2019/03/23 14:30 | Mathieu Perchicot v Pol Toledo Bague | 6-7,3-6 |
| ITF M15 Tabarka | 2019/03/23 11:20 | Mathieu Perchicot v Stefano Battaglino | 6-1,6-1 |
| ITF M15 Tabarka | 2019/03/21 13:30 | Mathieu Perchicot v Manfred Fellin | 6-3,6-1 |