Stadium: Court 2 Round: 27 Ground: Hardcourt outdoor
| ITF Japan F5 | 2017/04/06 03:10 | Tatsuma Ito v Ryota Tanuma | 6-2,6-4 |
| ITF Japan F3 | 2018/03/22 03:00 | Tatsuma Ito v Masamichi Imamura | 6-2,6-0 |
| ITF Japan F3 | 2018/03/20 06:00 | Tatsuma Ito v Naoki Nakagawa | 6-2,6-3 |
| Challenger Shenzhen | 2018/03/17 03:00 | Tatsuma Ito v Ilya Ivashka | 3-6,2-6 |
| Challenger Shenzhen | 2018/03/16 05:05 | Jurgen Zopp v Tatsuma Ito | 3-6,4-6 |
| Challenger Shenzhen | 2018/03/15 09:35 | Tatsuma Ito v Uladzimir Ignatik | 1-6,6-3,6-4 |
| Challenger Shenzhen | 2018/03/13 07:20 | Di Wu v Tatsuma Ito | 6-7,7-5,5-7 |
| Challenger Zhuhai | 2018/03/06 06:55 | Tatsuma Ito v Stefano Napolitano | 3-6,3-6 |
| Challenger Yokohama | 2018/03/04 02:30 | Yasutaka Uchiyama v Tatsuma Ito | 2-6,6-3,6-4 |
| ITF Japan F3 | 2018/03/22 03:00 | Ryota Tanuma v Sora Fukuda | 6-3,6-2 |
| ITF Japan F3 | 2018/03/19 04:05 | Shinta Fujii v Ryota Tanuma | 2-6,2-6 |
| ITF Japan F2 | 2018/03/12 02:30 | Yuya Kibi v Ryota Tanuma | 6-2,2-6,7-5 |
| Challenger Yokohama Qual | 2018/02/24 02:45 | Zhe Li v Ryota Tanuma | 5-7,6-1,6-2 |
| Challenger Kyoto Qual | 2018/02/18 01:00 | Ryota Tanuma v Shinta Fujii | 3-6,5-7 |
| Challenger Kyoto Qual | 2018/02/17 01:00 | Ryota Tanuma v Kazuma Kawachi | 6-3,6-0 |
| ITF China F3 | 2018/01/24 03:00 | Ryota Tanuma v Ivan Nedelko | 3-6,5-7 |
| ITF China F3 | 2018/01/22 05:55 | Tyler Lu v Ryota Tanuma | 3-6,3-6 |