Ground: Hardcourt outdoor
| 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 |
| ITF USA F7 Qual | 2015/02/08 15:30 | Christopher Morin Kougoucheff v Ryota Tanuma | 5-7,6-3,0-6 |
| ITF Japan F1 | 2015/03/13 01:00 | Ken Onishi v Yuya Kibi | 6-2,2-6,4-6 |
| ITF Japan F1 | 2015/03/12 01:00 | Arata Onozawa v Ken Onishi | 3-6,6-1,5-7 |
| ITF Japan F1 | 2015/03/11 01:00 | Takumi Tsunematsu v Ken Onishi | 3-6,3-6 |
| ITF Japan F1 | 2015/03/09 00:40 | Yohei Ono v Ken Onishi | 2-6,1-6 |
| ITF Australia F2 | 2015/03/04 02:55 | Brydan Klein v Ken Onishi | 6-3,6-2 |
| ITF Australia F2 Qual | 2015/03/01 23:30 | Ken Onishi v Blazo N Djurovic | 6-3,7-6 |
| ITF Australia F1 | 2015/02/24 01:00 | Ken Onishi v Gavin Van Peperzeel | 3-6,4-6 |
| ITF Australia F1 Qual | 2015/02/22 23:30 | Ken Onishi v William Ma | 6-3,7-5 |