| UTR Pro London | 2023/05/16 08:30 | Onuma, Yujiro v Janos Fekete | 3-6,3-6 |
| UTR Pro London | 2023/05/15 07:00 | Ed Pudney v Onuma, Yujiro | 4-6,0-6 |
| ITF - M25 Nottingham | 2023/05/01 10:50 | Onuma, Yujiro v Freddy Blaydes | 0-6,4-6 |
| ITF - M25 Nottingham - Qualif. | 2023/04/30 10:05 | Ying Hou v Onuma, Yujiro | 3-6,1-6 |
| ITF - M25 Nottingham | 2023/04/25 09:00 | Onuma, Yujiro v Luke Simkiss | 3-6,4-6 |
| ITF - M25 Nottingham - Qualif. | 2023/04/24 13:10 | Sean Hodkin v Onuma, Yujiro | 2-6,6-0,2-10 |
| ITF - M25 Nottingham | 2023/04/16 10:25 | Millen Hurrion v Onuma, Yujiro | 7-5,6-4 |
| UTR Pro Easton | 2023/04/08 08:00 | Onuma, Yujiro v Alexander Okonkwo | 7-6,6-0 |
| UTR Pro London | 2023/05/15 11:30 | Luka Petrovic v Anthony Weingarten | 7-5,6-7,4-6 |