Stadium: Court 6 Round: 27 Ground: Clay
| ITF Japan F6 | 2018/04/12 03:50 | Shunrou Takeshima v Naoki Tajima | 6-4,2-6,4-6 |
| ITF Japan F6 Qual | 2018/04/10 01:00 | Yuki Yudate v Naoki Tajima | 2-6,0-6 |
| ITF Japan F5 | 2018/04/04 05:10 | Naoki Tajima v Yusuke Takahashi | 4-6,2-6 |
| ITF Japan F5 | 2018/04/02 04:35 | Rimpei Kawakami v Naoki Tajima | 3-6,4-6 |
| ITF Japan F4 | 2018/03/29 04:15 | Naoki Tajima v Shintaro Imai | 4-6,3-6 |
| ITF Japan F4 | 2018/03/28 02:40 | Takuto Niki v Naoki Tajima | 5-7,6-7 |
| ITF Japan F3 | 2018/03/19 06:00 | Seong Chan Hong v Naoki Tajima | 6-1,4-6,6-4 |
| ITF Japan F5 | 2017/04/04 02:30 | Naoki Tajima v Toshihide Matsui | 6-1,4-6,3-6 |
| ITF Japan F6 | 2018/04/12 01:00 | Makoto Ochi v Zhe Li | 3-6,6-2,6-3 |
| ITF Japan F6 | 2018/04/11 01:00 | Makoto Ochi v Takuto Niki | 7-5,6-3 |
| ITF Japan F5 | 2018/04/07 01:00 | Makoto Ochi v Zhe Li | 3-6,3-6 |
| ITF Japan F5 | 2018/04/06 01:00 | Ryota Tanuma v Makoto Ochi | 6-2,3-6,6-7 |
| ITF Japan F5 | 2018/04/04 01:00 | Makoto Ochi v Sora Fukuda | 7-6,6-7,6-2 |
| ITF Japan F4 | 2018/03/29 01:00 | Makoto Ochi v Hiroyasu Ehara | 6-4,5-7,4-6 |
| ITF Japan F4 | 2018/03/28 01:00 | Jumpei Yamasaki v Makoto Ochi | 1-6,2-6 |
| ITF Japan F3 | 2018/03/24 02:00 | Seong Chan Hong v Makoto Ochi | 7-6,6-1 |