Ground: Synthetic outdoor
| ITF Japan F6 | 2015/06/09 04:00 | Koichi Sano v Issei Okamura | 2-6,4-6 |
| ITF Japan F6 Qual | 2015/06/08 01:00 | Ryota Kishi v Koichi Sano | 2-6,0-6 |
| ITF Japan F6 Qual | 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 Qual | 2014/06/09 03:00 | Keisuke Watanuki v Koichi Sano | 6-4,6-0 |
| ITF Japan F6 Qual | 2014/06/07 00:00 | Yusei Fukuoka v Koichi Sano | 0-6,2-6 |
| ITF Japan F7 Qual | 2015/06/14 00:00 | Masaki Osafune v Leo Julien Sebaoun | 7-5,6-2 |
| ITF Japan F3 | 2015/03/22 01:00 | Masaki Osafune v Jeamoon Lee | 4-6,3-6 |
| ITF Japan F7 Qual | 2014/06/16 01:00 | Masaki Osafune v Renta Tokuda | 4-6,3-6 |
| ITF Japan F1 | 2014/03/11 02:55 | Arata Onozawa v Masaki Osafune | 4-6,6-1,6-3 |