Round: 29 Ground: Clay
| ITF Japan F5 | 2014/06/04 01:00 | Kikuchi, Gengo v Watanuki, Yusuke | 2-6,6-4,6-4 |
| ITF Japan F8 | 2016/06/18 01:00 | Kikuchi, Gengo v Yuki Mochizuki | 6-3,7-6 |
| ITF Japan F8 | 2016/06/17 01:00 | Kibi, Yuya v Kikuchi, Gengo | 6-7,6-3,3-6 |
| ITF Japan F8 | 2016/06/16 02:50 | Kikuchi, Gengo v Kazuki Nishiwaki | 7-6,6-4 |
| ITF Japan F8 | 2016/06/14 03:00 | Kikuchi, Gengo v Sasai, Masaki | 7-5,6-4 |
| ITF Japan F7 | 2016/06/06 01:00 | Kikuchi, Gengo v King, Evan | 4-6,4-6 |
| ITF Japan F6 | 2016/06/03 03:10 | Kikuchi, Gengo v Baughman, Deiton | 1-6,4-6 |
| ITF Japan F6 | 2016/06/02 01:00 | Whittington, Andrew v Kikuchi, Gengo | 3-6,3-6 |
| ITF Japan F6 | 2016/05/31 02:30 | Onishi, Ken v Kikuchi, Gengo | 1-6,4-6 |
| ITF Japan F8 | 2016/06/18 03:15 | Watanuki, Yusuke v Renta Tokuda | 7-5,6-2 |
| ITF Japan F8 | 2016/06/17 03:40 | Sho Shimabukuro v Watanuki, Yusuke | 6-7,1-6 |
| ITF Japan F8 | 2016/06/16 03:20 | Yuta Shimizu v Watanuki, Yusuke | 3-6,6-3,4-6 |
| ITF Japan F7 | 2016/06/10 01:00 | Watanuki, Yusuke v King, Evan | 5-7,4-6 |
| ITF Japan F7 | 2016/06/09 01:00 | Watanuki, Yusuke v Tanuma, Ryota | 6-0,6-2 |
| ITF Japan F7 | 2016/06/06 04:40 | Watanuki, Yusuke v Takeshima, Shunrou | 7-5,6-4 |
| ITF Japan F5 | 2016/04/06 04:15 | Shiga, Masato v Watanuki, Yusuke | 7-6,6-4 |
| ITF Japan F1 | 2016/03/10 02:45 | Nagao, Katsuki v Watanuki, Yusuke | 1-6,6-2,1-6 |