Round: 45 Ground: Hardcourt indoor
| ITF Chinese Taipei F1 | 2015/08/20 03:30 | Masato Shiga v Issei Okamura | 4-6,4-6 |
| ITF Japan F4 | 2014/04/04 01:00 | Issei Okamura v Masato Shiga | 0-6,3-6 |
| 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 Hong Kong F3 | 2016/06/20 22:00 | Sami Reinwein v Masato Shiga | 6-4,6-2 |
| ITF Japan F8 | 2016/06/14 03:00 | Masato Shiga v Yuya Ito | 5-7,2-6 |
| ITF Japan F7 | 2016/06/10 01:00 | Masato Shiga v Sho Katayama | 3-6,3-6 |
| ITF Japan F7 | 2016/06/09 02:00 | Rio Noguchi v Masato Shiga | 3-6,3-6 |
| ITF Japan F7 | 2016/06/06 05:55 | Masato Shiga v Soichiro Moritani | 7-5,6-4 |
| ITF Japan F6 | 2016/05/31 05:30 | Masato Shiga v Yuya Kibi | 6-7,6-4,0-6 |
| ITF Guam F1 | 2016/05/28 01:35 | Masato Shiga v Shuichi Sekiguchi | 4-6,6-7 |
| ITF Guam F1 | 2016/05/27 04:25 | Masato Shiga v Masaki Sasai | 6-2,6-1 |