Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2023/10/01 08:00 | Matei Cristian Onofrei v Yudai Umeoka | 6-3,6-3 |
| ITF M15 Monastir | 2023/09/24 08:30 | Thomas Braithwaite v Yudai Umeoka | 6-1,6-1 |
| ITF M15 Monastir | 2023/09/17 09:00 | Yudai Umeoka v Luca Hesselmann | 1-6,4-6 |
| ITF M25 Monastir | 2023/09/11 14:45 | Robin Bulant v Yudai Umeoka | 6-2,6-3 |
| ITF M25 Monastir | 2023/09/11 11:05 | Joris Hoogland v Yudai Umeoka | 6-7,6-3,8-10 |
| UTR Pro Miki | 2023/04/15 02:00 | Yudai Umeoka v Mao Takada | 6-2,6-7,0-1 |
| UTR Pro Miki | 2023/04/13 00:30 | Yudai Umeoka v Yuto Oki | 2-6,0-6 |
| UTR Pro Miki | 2023/04/12 06:23 | Yudai Umeoka v Ren Nakamura | 3-6,1-6 |
| ITF M25 Traralgon | 2024/02/27 01:05 | Jesse Delaney v Issei Okamura | 6-4,6-4 |
| ITF M25 Traralgon | 2024/02/26 01:30 | Winter Meagher v Issei Okamura | 2-6,2-6 |
| ITF M25 Traralgon | 2024/02/20 23:00 | Issei Okamura v Matt Hulme | 6-1,3-6,3-6 |
| ITF M25 Traralgon | 2024/02/20 00:25 | Yuta Kikuchi v Issei Okamura | 1-6,7-5,6-10 |
| ITF M25 Traralgon | 2024/02/18 23:00 | Cooper Errey v Issei Okamura | 4-6,6-7 |
| ITF M25 Doha | 2024/01/17 13:05 | Issei Okamura v Ali Habib | 3-6,2-6 |
| ITF M25 Doha | 2024/01/16 12:00 | Saba Purtseladze v Issei Okamura | 4-6,5-7 |
| ITF M25 Doha | 2024/01/15 12:00 | Issei Okamura v Alberto Lim | 0-6,0-6 |