Stadium: C Round: 26 Ground: Hardcourt outdoor
| Yokohama, Japan, Qualifying | 2018/02/24 01:00 | Takeuchi, Kento (1987) v Jumpei Yamasaki | 3-6,3-6 |
| ITF China F6 | 2018/05/14 05:45 | Wang, Huixin v Jumpei Yamasaki | 3-6,3-6 |
| ITF China F5 | 2018/05/12 03:00 | Jumpei Yamasaki v Rigele Te | 3-6,6-7 |
| ITF China F5 | 2018/05/11 06:05 | Jumpei Yamasaki v Kuan-Yi Lee | 6-4,6-4 |
| ITF China F5 | 2018/05/10 03:00 | Kim, Cheong-Eui v Jumpei Yamasaki | 2-6,5-7 |
| ITF China F5 | 2018/05/09 02:00 | Zou, Weibowen v Jumpei Yamasaki | 0-6,0-6 |
| ITF Vietnam F1 | 2018/05/03 03:00 | Chun Hsin Tseng v Jumpei Yamasaki | 6-2,6-3 |
| ITF Vietnam F1 | 2018/05/02 03:00 | Niki Kaliyanda Poonacha v Jumpei Yamasaki | 4-6,6-3,1-6 |
| ITF Vietnam F1 | 2018/04/30 06:15 | Barki, Justin v Jumpei Yamasaki | 4-6,4-6 |
| ITF China F5 | 2018/05/08 03:55 | Takeuchi, Kento (1987) v Jie Cui | 1-6,6-3,3-6 |
| ITF Nigeria F3 | 2018/04/30 11:00 | Thomas Setodji v Takeuchi, Kento (1987) | 4-6,6-7 |
| Nigeria F2, Singles | 2018/04/23 09:00 | Boutillier, Remi v Takeuchi, Kento (1987) | 6-3,6-1 |
| Nigeria F1, Singles | 2018/04/17 12:00 | Jacobs, Tuki v Takeuchi, Kento (1987) | 6-3,6-2 |
| ITF Japan F6 | 2018/04/10 03:20 | Takeuchi, Kento (1987) v Takeshima, Shunrou | 6-4,4-6,5-7 |
| ITF Japan F4 | 2018/03/27 03:00 | Takeuchi, Kento (1987) v Katayama, Sho | 6-4,4-6,5-7 |
| ITF Japan F3 | 2018/03/22 05:15 | Takeuchi, Kento (1987) v Makoto Ochi | 3-6,2-6 |
| ITF Japan F3 | 2018/03/19 01:00 | Takeuchi, Kento (1987) v Takeshima, Shunrou | 6-1,6-2 |