| ITF Japan F6 Qual | 2015/06/07 05:00 | Yuichiro Inui v Yusei Fukuoka | 2-6,7-5,6-4 |
| ITF Japan F5 | 2015/06/03 06:00 | Yuichiro Inui v Yuichi Ito | 3-6,3-6 |
| ITF Japan F5 | 2015/06/01 01:00 | Sung Min Han v Yuichiro Inui | 3-6,6-2,2-6 |
| ITF Japan F5 | 2015/05/31 01:00 | Yuichiro Inui v David Barclay | 6-3,3-6,6-1 |
| ITF Japan F4 | 2015/03/28 03:00 | Shinta Fujii v Yuichiro Inui | 6-2,6-7,6-1 |
| ITF Kuwait F3 | 2014/11/26 10:05 | Roberto Ortega-Olmedo v Yuichiro Inui | 6-3,6-1 |
| ITF Kuwait F3 | 2014/11/24 08:40 | Yuichiro Inui v Andrei Patrui | 6-4,6-7,7-5 |
| ITF Kuwait F2 | 2014/11/15 06:30 | Nino Portales v Yuichiro Inui | 7-6,6-1 |
| ITF Japan F5 | 2015/06/01 04:10 | Issei Okamura v Ryota Tanuma | 6-7,4-6 |
| ITF Japan F5 | 2015/05/30 01:00 | Issei Okamura v Shota Iino | 6-3,2-6,6-4 |
| ITF Thailand F9 | 2015/05/06 06:35 | Tyler Hochwalt v Issei Okamura | 6-3,1-6,6-2 |
| ITF Thailand F9 | 2015/05/05 11:00 | Sidharth Rawat v Issei Okamura | 4-6,7-5,6-7 |
| ITF Thailand F9 | 2015/05/03 04:00 | Kelsey Stevenson v Issei Okamura | 6-7,4-6 |
| ITF Thailand F9 | 2015/05/02 07:30 | Issei Okamura v Ken Onoda | 6-2,6-4 |
| ITF China F4 | 2015/04/21 04:35 | Chuhan Wang v Issei Okamura | 6-4,6-4 |
| ITF China F4 Qual | 2015/04/19 02:00 | Issei Okamura v Ruikai Wang | 6-3,6-4 |