| ITF Japan F3 | 2015/03/21 02:30 | Issei Okamura v Keisuke Watanuki | 6-2,6-3 |
| ITF Japan F2 | 2015/03/15 01:00 | Masaki Sasai v Issei Okamura | 6-3,6-0 |
| ITF Japan F1 | 2015/03/09 00:40 | Shintaro Imai v Issei Okamura | 6-0,6-1 |
| ITF Japan F8 | 2014/06/24 02:40 | Issei Okamura v Yoshihito Nishioka | 0-6,3-6 |
| ITF Japan F7 | 2014/06/17 02:05 | Issei Okamura v Gengo Kikuchi | 4-6,2-6 |
| ITF Japan F5 | 2014/06/02 01:00 | Issei Okamura v Katsuki Nagao | 1-6,6-7 |
| ITF Japan F4 | 2014/04/04 01:00 | Issei Okamura v Masato Shiga | 0-6,3-6 |
| ITF Japan F4 | 2014/04/02 02:45 | Issei Okamura v Masaki Sasai | 6-3,6-3 |
| ITF Japan F2 | 2015/03/15 01:00 | Ryota Tanuma v Ken Onishi | 2-6,6-4,3-6 |
| ITF Japan F2 | 2015/03/14 00:30 | Ryota Tanuma v Kazuki Nishiwaki | 6-4,6-4 |
| ITF USA F9 Qual | 2015/02/23 14:30 | Rafael Matos v Ryota Tanuma | 6-4,6-4 |
| ITF USA F9 Qual | 2015/02/21 15:00 | Moritz Dettinger v Ryota Tanuma | 0-6,4-6 |
| ITF USA F9 Qual | 2015/02/20 18:00 | Antoine Leduc v Ryota Tanuma | 2-6,7-6,1-6 |
| ITF USA F8 Qual | 2015/02/15 17:30 | Dominic Cotrone v Ryota Tanuma | 6-3,6-2 |
| ITF USA F7 | 2015/02/11 14:30 | Tommy Paul v Ryota Tanuma | 6-2,6-2 |
| ITF USA F7 Qual | 2015/02/09 15:30 | Weiqiang Zheng v Ryota Tanuma | 1-6,3-6 |