Round: 26 Ground: Hardcourt outdoor
| ITF Japan F5 | 2014/06/04 01:00 | Kikuchi, Gengo v Watanuki, Yusuke | 2-6,6-4,6-4 |
| ITF Japan F1 | 2016/03/10 01:00 | Kikuchi, Gengo v Ning, Yuqing | 6-3,6-3 |
| ITF Japan F1 | 2016/03/07 01:00 | Kikuchi, Gengo v Tashiro, Yuga | 6-1,4-6,6-1 |
| ITF Japan F1 | 2016/03/06 01:00 | Kikuchi, Gengo v Uesugi, Teppei | 6-2,6-0 |
| ITF Japan F5 | 2015/06/02 01:00 | Takeshima, Shunrou v Kikuchi, Gengo | 7-5,6-4 |
| ITF Guam F1 | 2015/05/31 01:00 | Kikuchi, Gengo v Suzuki, Takao | 3-6,3-6 |
| ITF Guam F1 | 2015/05/30 04:20 | Kikuchi, Gengo v Ko Suzuki | 6-2,6-3 |
| ITF Guam F1 | 2015/05/29 04:25 | Kelsey Stevenson v Kikuchi, Gengo | 2-6,3-6 |
| ITF Guam F1 | 2015/05/28 01:15 | Onoda, Ken v Kikuchi, Gengo | 4-6,6-7 |
| ITF Japan F1 | 2016/03/10 02:45 | Nagao, Katsuki v Watanuki, Yusuke | 1-6,6-2,1-6 |
| ITF Turkey F5 | 2016/02/03 08:00 | Gigounon, Germain v Watanuki, Yusuke | 6-1,4-6,6-4 |
| ITF Turkey F4 | 2016/01/26 11:05 | Watanuki, Yusuke v Tallon Griekspoor | 3-6,1-6 |
| ITF Turkey F3 | 2016/01/22 13:40 | Joris De Loore v Watanuki, Yusuke | 6-3,6-0 |
| ITF Turkey F3 | 2016/01/22 09:00 | Altug Celikbilek v Watanuki, Yusuke | 3-6,6-7 |
| ITF Turkey F3 | 2016/01/19 08:00 | Wagner, Hannes v Watanuki, Yusuke | 5-7,1-6 |
| ITF Australia F7 | 2015/10/08 03:00 | Watanuki, Yusuke v Tearney, Finn | 6-1,1-6,3-6 |
| ITF Australia F7 | 2015/10/07 01:15 | Watanuki, Yusuke v Nolan, Daniel | 6-1,6-3 |