Stadium: Court G Round: 45 Ground: Hardcourt indoor
| ITF Vietnam F4 | 2016/09/16 03:00 | Yuichi Ito v Issei Okamura | 6-2,4-6,6-4 |
| ITF Japan F4 | 2014/04/01 03:45 | Yuichi Ito v Issei Okamura | 7-6,2-6,6-7 |
| ITF Thailand F4 | 2018/09/26 02:30 | Sidharth Rawat v Yuichi Ito | 6-4,6-4 |
| ITF Thailand F4 | 2018/09/25 06:00 | Yuichi Ito v Daisuke Sumizawa | 6-2,6-3 |
| ITF Thailand F3 | 2018/09/05 04:00 | Yuichi Ito v Takashi Saito | 2-6,6-4,3-6 |
| ITF Thailand F3 | 2018/09/04 04:20 | Yuichi Ito v Masayoshi Ono | 7-6,6-3 |
| ITF Thailand F2 | 2018/08/28 05:35 | Thanapet Chanta v Yuichi Ito | 6-4,6-4 |
| ITF Korea F5 | 2018/08/21 03:00 | Yuichi Ito v Chan-Yeong Oh | 7-6,6-7,3-6 |
| ITF Malaysia F3 | 2018/07/17 02:00 | Yuichi Ito v Lance-Pierre Du Toit | 2-6,6-4,3-6 |
| ITF Malaysia F2 | 2018/07/10 02:00 | Yuichi Ito v Michail Pervolarakis | 2-6,2-6 |
| 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 Australia F5 | 2018/09/18 00:00 | Scott Puodziunas v Issei Okamura | 6-7,7-5,4-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | Issei Okamura v Jung-Woong Na | 3-6,6-1,1-6 |