Round: 26 Ground: Hardcourt outdoor
| ITF Japan F8 | 2016/06/15 06:25 | Issei Okamura v Yusuke Takahashi | 3-6,0-6 |
| ITF Japan F7 | 2016/06/06 02:50 | Issei Okamura v Kento Takeuchi | 2-6,3-6 |
| ITF Japan F6 | 2016/05/31 01:00 | Ko Suzuki v Issei Okamura | 6-1,6-3 |
| ITF Spain F15 | 2016/05/25 09:00 | Issei Okamura v Bernabe Zapata Miralles | 3-6,2-6 |
| ITF Spain F14 | 2016/05/16 09:00 | Issei Okamura v Ryota Tanuma | 0-6,3-6 |
| ITF Spain F13 | 2016/05/12 10:10 | Issei Okamura v Juan Lizariturry | 5-7,5-7 |
| ITF Spain F13 | 2016/05/10 16:00 | Issei Okamura v Andrey Chepelev | 3-6,6-4,7-6 |
| ITF Spain F13 | 2016/05/09 08:00 | Issei Okamura v Thibault Cancel | 6-4,5-7,4-6 |
| ITF China F11 | 2016/07/05 03:40 | Kazuma Kawachi v Ruitong Fang | 6-4,6-3 |
| ITF Japan F8 | 2016/06/13 01:00 | Kazuma Kawachi v Yuki Mochizuki | 2-6,2-6 |
| ITF Japan F5 | 2016/04/04 00:30 | Soichiro Moritani v Kazuma Kawachi | 4-6,7-6,6-3 |
| ITF Japan F4 | 2016/03/27 01:00 | Ryota Tanuma v Kazuma Kawachi | 6-2,6-1 |
| ITF Japan F4 | 2016/03/26 00:00 | Shoma Kato v Kazuma Kawachi | 2-6,4-6 |
| ITF Japan F3 | 2016/03/19 03:45 | Kazuma Kawachi v Weiqiang Zheng | 4-6,1-6 |
| ITF Japan F1 | 2016/03/07 01:00 | Keisuke Watanuki v Kazuma Kawachi | 6-1,6-1 |
| ITF Japan F1 | 2016/03/06 03:00 | Kazuma Kawachi v Ren Nakamura | 3-6,6-4,6-2 |