Ground: Hardcourt outdoor
| ITF Japan F3 | 2015/03/25 03:00 | Shiga, Masato v Ito, Yuichi | 3-6,6-3,5-7 |
| ITF Japan F2 | 2015/03/17 02:50 | Shiga, Masato v Yi, Chu-Huan | 1-6,2-6 |
| ITF Turkey F3 | 2015/01/27 08:00 | Shiga, Masato v Lucas Miedler | 6-3,6-7,5-7 |
| ITF Turkey F4 | 2015/01/26 11:40 | Shiga, Masato v Zgombic, Fran Zvonimir | 6-1,6-2 |
| ITF Turkey F4 | 2015/01/25 08:00 | Shiga, Masato v Gabriele Maria Noce | 7-6,6-3 |
| ITF Turkey F3 | 2015/01/20 09:30 | Shiga, Masato v Uzhylovsky, Vladimir | 3-6,6-3,3-6 |
| ITF Turkey F2 | 2015/01/15 10:00 | Shiga, Masato v Smirnov, Artem | 4-6,2-6 |
| ITF Australia F8 | 2014/10/14 03:35 | Shiga, Masato v Kibi, Yuya | 6-7,1-6 |
| ITF Japan F4 | 2015/03/28 00:30 | Tanuma, Ryota v Otsuka, Yohei | 6-4,6-1 |
| ITF Japan F3 | 2015/03/26 03:30 | Tanuma, Ryota v Akira Santillan | 3-6,5-7 |
| ITF Japan F3 | 2015/03/25 02:10 | Tanuma, Ryota v Kikuchi, Gengo | 6-3,7-5 |
| ITF Japan F2 | 2015/03/15 01:00 | Tanuma, Ryota v Onishi, Ken | 2-6,6-4,3-6 |
| ITF Japan F2 | 2015/03/14 00:30 | Tanuma, Ryota v Kazuki Nishiwaki | 6-4,6-4 |
| ITF USA F9 Qual | 2015/02/23 14:30 | Matos, Rafael v Tanuma, Ryota | 6-4,6-4 |
| ITF USA F9 Qual | 2015/02/21 15:00 | Dettinger, Moritz v Tanuma, Ryota | 0-6,4-6 |
| ITF USA F9 Qual | 2015/02/20 18:00 | Leduc, Antoine v Tanuma, Ryota | 2-6,7-6,1-6 |