Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF Japan F4 | 2018/03/31 02:30 | Yosuke Watanuki v Ryota Tanuma | 6-4,6-3 |
| ITF Japan F4 | 2018/03/30 01:00 | Ryota Tanuma v Hiroyasu Ehara | 6-3,4-6,6-4 |
| ITF Japan F4 | 2018/03/29 01:00 | Sora Fukuda v Ryota Tanuma | 7-6,1-6,4-6 |
| ITF Japan F4 | 2018/03/28 01:00 | Ryota Tanuma v Rigele Te | 7-5,6-4 |
| ITF Japan F4 | 2018/03/26 01:00 | Ryota Tanuma v Yuki Matsuo | 6-2,6-1 |
| ITF Japan F4 | 2018/03/25 01:00 | Ryota Tanuma v Wei-De Lin | 6-1,7-6 |
| ITF Japan F4 | 2018/03/24 00:00 | Ryota Tanuma v Kazuki Shimizu | 6-2,6-1 |
| ITF Japan F3 | 2018/03/22 06:55 | Tatsuma Ito v Ryota Tanuma | 6-7,6-2,6-1 |
| ITF Japan F4 | 2018/03/26 01:00 | Soichiro Moritani v Shinta Fujii | 6-4,3-6,3-6 |
| ITF Japan F4 | 2018/03/25 01:00 | Soichiro Moritani v Masaki Sasai | 6-4,6-3 |
| ITF Japan F4 | 2018/03/24 02:00 | Soichiro Moritani v Itsuki Matsumoto | 6-2,6-3 |
| ITF Japan F3 | 2018/03/19 01:00 | Sho Katayama v Soichiro Moritani | 6-2,6-0 |
| ITF Japan F3 | 2018/03/18 01:00 | Soichiro Moritani v Takashi Saito | 6-3,3-6,0-6 |
| ITF Japan F3 | 2018/03/17 04:00 | Soichiro Moritani v Kazuki Shimizu | 6-2,6-3 |
| ITF Japan F2 | 2018/03/16 01:00 | Soichiro Moritani v Shintaro Imai | 2-6,5-7 |
| ITF Japan F2 | 2018/03/14 02:40 | Kento Takeuchi v Soichiro Moritani | 4-6,0-6 |