Stadium: Court 12 Round: 54 Ground: Hardcourt outdoor
| Challenger - Kobe | 2018/11/11 03:35 | Jacob Grills v Issei Okamura | 1-6,6-4,6-3 |
| Challenger - Kobe | 2018/11/10 03:25 | Yuichi Ito v Issei Okamura | 4-6,7-6,3-6 |
| ITF Australia F8 | 2018/10/09 00:00 | Moerani Bouzige v Issei Okamura | 7-5,6-1 |
| ITF Australia F7 | 2018/10/04 03:55 | Benjamin Mitchell v Issei Okamura | 6-4,1-6,6-1 |
| ITF Australia F7 | 2018/10/02 00:00 | Issei Okamura v Vincent Stouff | 6-4,6-4 |
| ITF Australia F6 | 2018/09/25 00:30 | Connor Farren v Issei Okamura | 3-6,7-6,6-2 |
| ITF Australia F5 | 2018/09/21 01:00 | Brydan Klein v Issei Okamura | 6-3,6-2 |
| ITF Australia F5 | 2018/09/20 03:55 | Aaron Addison v Issei Okamura | 2-6,7-6,2-6 |
| ITF Spain F7 | 2018/03/16 12:00 | Kyle Lok Yin Tang v Grigoriy Korobeynikov | 1-6,4-6 |
| ITF Turkey F8 | 2018/02/25 07:30 | Kyle Lok Yin Tang v Tomas Martin Etcheverry | 2-6,1-6 |
| ITF Hong Kong F6 | 2017/12/30 03:00 | Francesco Bessire v Kyle Lok Yin Tang | 6-1,6-1 |
| ITF Hong Kong F5 | 2017/12/23 03:00 | Kyle Lok Yin Tang v Marko Osmakcic | 2-6,0-6 |