Ground: Hardcourt outdoor
| ITF Japan F3 | 2015/03/24 03:20 | Yasutaka Uchiyama v Arata Onozawa | 6-3,6-2 |
| ITF Japan F2 | 2015/03/17 04:10 | Masaki Sasai v Arata Onozawa | 6-4,6-4 |
| ITF Japan F1 | 2015/03/12 01:00 | Arata Onozawa v Ken Onishi | 3-6,6-1,5-7 |
| ITF Japan F1 | 2015/03/10 01:00 | Arata Onozawa v Taiki Hashimoto | 6-2,6-1 |
| ITF Turkey F2 | 2015/01/17 07:00 | Arata Onozawa v Alexey Vatutin | 2-6,2-6 |
| ITF Turkey F2 | 2015/01/15 12:55 | Miki Jankovic v Arata Onozawa | 4-6,7-6,0-6 |
| ITF Turkey F1 | 2015/01/08 08:00 | Hugo Nys v Arata Onozawa | 6-1,6-2 |
| ITF Turkey F1 | 2015/01/07 08:00 | Gleb Alekseenko v Arata Onozawa | 4-6,4-6 |
| ITF Japan F3 | 2015/03/27 03:25 | Di Wu v Shuichi Sekiguchi | 1-6,7-5,6-2 |
| ITF Japan F3 | 2015/03/26 01:00 | Takashi Saito v Shuichi Sekiguchi | 3-6,6-7 |
| ITF Japan F3 | 2015/03/24 02:10 | Yusuke Watanuki v Shuichi Sekiguchi | 1-6,3-6 |
| ITF Turkey F2 | 2015/01/17 07:00 | Jose Pereira v Shuichi Sekiguchi | 6-3,7-5 |
| ITF Turkey F1 | 2015/01/11 09:00 | Shuichi Sekiguchi v Hugo Nys | 6-7,6-4,6-3 |
| ITF Turkey F1 | 2015/01/10 08:00 | Alexey Vatutin v Shuichi Sekiguchi | 4-6,6-2,5-7 |
| ITF Turkey F1 | 2015/01/09 08:00 | Jose Pereira v Shuichi Sekiguchi | 4-6,6-3,3-6 |
| ITF Turkey F1 | 2015/01/08 08:00 | Volodymyr Uzhylovskyi v Shuichi Sekiguchi | 3-6,5-7 |