Round: 26 Ground: Hardcourt outdoor
| ITF Japan F4 | 2017/03/29 05:20 | Shiga, Masato v Tanuma, Ryota | 4-6,1-6 |
| ITF Japan F3 | 2017/03/20 01:00 | Tanuma, Ryota v Wishaya Trongcharoenchaikul | 3-6,2-6 |
| ITF China F3 | 2017/02/28 06:05 | Petrovic, Danilo v Tanuma, Ryota | 7-6,6-4 |
| ITF China F2 | 2017/02/24 03:00 | Tanuma, Ryota v Romboli, Fernando | 3-6,5-7 |
| ITF China F2 | 2017/02/23 05:40 | Petrovic, Danilo v Tanuma, Ryota | 6-7,6-4,6-7 |
| ITF China F2 | 2017/02/21 05:00 | Rigele Te v Tanuma, Ryota | 6-7,1-6 |
| ITF China F2 Qual | 2017/02/20 04:20 | Tanuma, Ryota v Daisuke Sumizawa | 6-4,6-2 |
| ITF China F2 Qual | 2017/02/19 07:25 | Tanuma, Ryota v Liu, Shiyou | 6-4,6-2 |
| ITF Japan F4 | 2017/03/28 02:00 | Osafune, Masaki v Rio Noguchi | 1-6,7-6,6-3 |
| ITF Japan F4 | 2017/03/25 02:00 | Oku, Hiromasa v Osafune, Masaki | 1-6,0-6 |
| ITF Japan F3 | 2017/03/18 03:00 | Masaya Kobayashi v Osafune, Masaki | 7-6,6-7,6-4 |
| ITF Japan F2 | 2017/03/12 02:00 | Wachiramanowong, Kittipong v Osafune, Masaki | 6-3,6-4 |
| ITF Japan F2 | 2017/03/11 03:00 | Osafune, Masaki v Vu, Artem | 6-2,6-1 |
| ITF Japan F1 | 2017/03/05 01:00 | Osafune, Masaki v Watanuki, Keisuke | 6-7,6-0,2-6 |
| ITF Japan F4 | 2016/03/27 01:00 | Nagao, Katsuki v Osafune, Masaki | 6-1,6-2 |
| ITF Dominican Republic F2 | 2015/12/06 14:00 | Juan Carlos Aguilar v Osafune, Masaki | 7-5,6-3 |