Estádio: Court 6 Round: 27 Ground: Hardcourt outdoor
| ITF - M25 Matsuyama | 2019/04/12 02:35 | Masamichi Imamura v Naoki Tajima | 2-6,4-6 |
| ITF - M25 Matsuyama | 2019/04/11 01:00 | Naoki Tajima v Kousuke Ogura | 6-4,6-0 |
| ITF - M15 Kashiwa | 2019/04/03 03:05 | Tamaki Yamao v Naoki Tajima | 6-1,3-6,6-2 |
| ITF - M15 Tsukuba | 2019/03/30 01:00 | Naoki Tajima v Shintaro Imai | 1-6,2-6 |
| ITF - M15 Tsukuba | 2019/03/29 03:35 | Naoki Tajima v Yuta Shimizu | 6-4,7-6 |
| ITF - M15 Tsukuba | 2019/03/28 03:00 | Mark Whitehouse v Naoki Tajima | 4-6,6-4,3-6 |
| ITF - M15 Tsukuba | 2019/03/27 03:25 | Issei Okamura v Naoki Tajima | 3-6,4-6 |
| ITF M15 Kofu | 2019/03/21 03:40 | Yusuke Takahashi v Naoki Tajima | 6-3,6-2 |
| ITF - M25 Matsuyama | 2019/04/12 02:25 | Issei Okamura v Shuichi Sekiguchi | 1-6,0-6 |
| ITF - M25 Matsuyama | 2019/04/09 04:10 | Ryota Tanuma v Shuichi Sekiguchi | 4-6,4-6 |
| ITF - M15 Kashiwa | 2019/04/03 05:20 | Takuto Niki v Shuichi Sekiguchi | 2-6,6-3,7-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/17 02:00 | Shuichi Sekiguchi v Seong Chan Hong | 6-7,4-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/16 01:00 | Takuto Niki v Shuichi Sekiguchi | 4-6,7-6,3-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/15 01:00 | Shuichi Sekiguchi v Shintaro Imai | 6-3,6-0 |
| ITF - M15 Nishi-Tokyo | 2019/03/14 03:45 | Shuichi Sekiguchi v Yuki Mochizuki | 6-2,6-1 |
| ITF - M15 Nishi-Tokyo | 2019/03/13 01:00 | Shuichi Sekiguchi v Keisuke Saitoh | 6-3,6-2 |