Stadium: Alpha Round: 25 Ground: Hardcourt outdoor
| ITF M15 Tsukuba | 2019/03/27 03:25 | Issei Okamura v Naoki Tajima | 3-6,4-6 |
| ITF M15 Anning | 2019/01/10 04:30 | Issei Okamura v Naoki Tajima | 6-4,3-6,4-6 |
| ITF M15 Nishi-Tokyo | 2024/03/18 03:30 | Jumpei Yamasaki v Issei Okamura | 6-2,6-1 |
| ITF M15 Hinode | 2024/03/11 04:30 | Koki Matsuda v Issei Okamura | 6-4,6-3 |
| ITF M15 Hinode | 2024/03/11 01:00 | Yudai Umeoka v Issei Okamura | 3-6,6-7 |
| 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 Swan Hill | 2024/03/19 03:00 | Naoki Tajima v Jesse Delaney | 5-7,6-2,4-6 |
| ITF M25 Mildura | 2024/03/11 23:50 | Naoki Tajima v Sam Oster | 6-3,3-6,6-10 |
| ITF M25 Mildura | 2024/03/10 22:30 | Naoki Tajima v Duncan McCall | 6-4,6-2 |
| ITF M25 Traralgon | 2024/02/27 01:30 | Naoki Tajima v Luke Sorensen | 7-6,5-7,10-7 |
| ITF M25 Traralgon | 2024/02/26 01:30 | Naoki Tajima v Benjamin Loccisano | 6-0,6-0 |
| ITF M25 Traralgon | 2024/02/19 01:30 | Naoki Tajima v Adrian Arcon | 3-6,2-6 |
| Challenger Burnie Qual | 2024/02/04 02:35 | Jacob Bradshaw v Naoki Tajima | 6-4,6-4 |
| Challenger Burnie | 2024/01/28 03:40 | Takuya Kumasaka v Naoki Tajima | 6-4,7-6 |