Stadium: Court 4 Round: 27
| ITF Japan F3 | 2015/03/25 02:10 | Tanuma, Ryota v Kikuchi, Gengo | 6-3,7-5 |
| ITF Vietnam F2 | 2018/05/08 03:00 | Kikuchi, Gengo v Yeung, Pak Long | 4-6,7-5,6-2 |
| ITF Vietnam F2 | 2018/05/06 04:00 | Kikuchi, Gengo v Niki Kaliyanda Poonacha | 6-1,6-1 |
| ITF Vietnam F2 | 2018/05/05 03:00 | Kikuchi, Gengo v Yuichiro Inui | 6-4,6-4 |
| ITF Vietnam F1 | 2018/04/30 03:00 | Kikuchi, Gengo v Chun Hsin Tseng | 2-6,7-6,4-6 |
| ITF Japan F5 | 2018/04/01 00:30 | Kikuchi, Gengo v Liu, Shao-Fan | 6-2,6-7,3-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Kikuchi, Gengo v Daisuke Sumizawa | 6-1,6-3 |
| ITF Japan F3 | 2018/03/20 06:00 | Tung-Lin Wu v Kikuchi, Gengo | 6-2,6-3 |
| ITF Japan F3 | 2018/03/18 01:00 | Kikuchi, Gengo v Kousuke Ogura | 6-3,6-2 |
| ITF Vietnam F2 | 2018/05/09 03:00 | Linh Giang Trinh v Tanuma, Ryota | 6-3,3-6,5-7 |
| ITF Vietnam F2 | 2018/05/07 05:15 | Andrzejczuk, Adrian v Tanuma, Ryota | 4-6,1-6 |
| ITF Vietnam F1 | 2018/05/02 05:25 | Tanuma, Ryota v Vuradin, Lucas | 6-7,2-6 |
| ITF Vietnam F1 | 2018/05/01 03:00 | Tanuma, Ryota v Wong, Chun Hun | 3-6,7-6,6-1 |
| ITF Japan F6 | 2018/04/10 04:45 | Iino, Shota v Tanuma, Ryota | 2-6,2-6 |
| ITF Japan F5 | 2018/04/06 01:00 | Tanuma, Ryota v Makoto Ochi | 6-2,3-6,6-7 |
| ITF Japan F5 | 2018/04/04 05:35 | Kawahashi, Yuta v Tanuma, Ryota | 6-3,1-6,4-6 |
| ITF Japan F5 | 2018/04/03 01:00 | Rigele Te v Tanuma, Ryota | 6-2,1-6,2-6 |