Ground: Synthetic outdoor
| ITF - Japan F7 - Qualifikation | 2015/06/15 00:30 | Koichi Sano v Masaki Osafune | 6-4,6-2 |
| ITF - Japan F6 | 2015/06/09 04:00 | Koichi Sano v Issei Okamura | 2-6,4-6 |
| ITF - Japan F6 - Qualifikation | 2015/06/08 01:00 | Ryota Kishi v Koichi Sano | 2-6,0-6 |
| ITF - Japan F6 - Qualifikation | 2015/06/07 05:00 | Koichi Sano v Keisuke Numajiri | 6-0,4-6,6-1 |
| ITF - Japan F5 | 2015/06/02 03:15 | Hiromasa Oku v Koichi Sano | 6-4,3-6,6-2 |
| ITF - Guam F1 | 2015/05/28 00:00 | Koichi Sano v Ko Suzuki | 2-6,1-6 |
| ITF - Guam F1 | 2015/05/26 03:40 | Matias Franco Descotte v Koichi Sano | 2-6,6-7 |
| ITF - Japan F6 - Qualifikation | 2014/06/09 03:00 | Keisuke Watanuki v Koichi Sano | 6-4,6-0 |
| ITF - Korea F1 | 2015/05/16 03:30 | Soonwoo Kwon v Oh-Hee Kwon | 6-2,6-1 |