Ground: Hardcourt outdoor
| 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 |
| ITF USA F8 Qual | 2015/02/15 17:30 | Cotrone, Dominic v Tanuma, Ryota | 6-3,6-2 |