Stadium: Court 7 Round: 25 Ground: Clay
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/05/02 08:30 | Kazuma Kawachi v Matos, Rafael | 4-6,4-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/04/30 10:10 | Canas Garcia, Juan Pablo v Kazuma Kawachi | 2-6,4-6 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/09 01:00 | Kazuma Kawachi v Tomohiro Masabayashi | 5-7,6-4,3-10 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/28 00:50 | Rinky Hijikata v Kazuma Kawachi | 6-1,6-4 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/25 23:00 | Kazuma Kawachi v Ibraimi, Mustafa | 6-2,6-4 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/24 23:00 | Kazuma Kawachi v Sam Ryan Ziegann | 6-2,6-1 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/21 01:45 | Christopher O'Connell v Kazuma Kawachi | 6-2,6-2 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/20 02:15 | Brandon Walkin v Kazuma Kawachi | 6-3,3-6,4-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/05/01 11:10 | Lakat, Florian v Onishi, Ken | 6-3,4-6,6-0 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/04/29 08:00 | Recci, Mason v Onishi, Ken | 4-6,1-6 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/09 02:50 | Brymer, Gage v Onishi, Ken | 7-6,6-2 |
| ITF - M15 Tsukuba | 2019/03/25 01:00 | Ryuki Matsuda v Onishi, Ken | 6-2,6-3 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/18 00:30 | Veldheer, Mick v Onishi, Ken | 7-5,6-2 |
| ITF - M15 Sharm El Sheikh | 2019/03/11 08:00 | Onishi, Ken v Tsivadze, George | 3-6,6-2,8-10 |
| ITF - M15 Sharm El Sheikh | 2019/03/06 12:35 | Onishi, Ken v Tsivadze, George | 3-6,6-2,3-6 |
| ITF Pakistan F3 | 2018/12/17 05:30 | Onishi, Ken v Lorenzo Bocchi | 6-7,3-6 |