Stadium: Court 1 Round: 44 Ground: Hardcourt outdoor
| ITF Japan F1 | 2018/03/08 01:30 | Naoki Nakagawa v Gengo Kikuchi | 7-5,7-6 |
| ITF Japan F1 | 2018/03/07 01:00 | Cheng-Yu Yu v Gengo Kikuchi | 5-7,5-7 |
| ITF Japan F1 | 2018/03/05 01:00 | Gengo Kikuchi v Masaya Kobayashi | 6-2,7-5 |
| ITF Japan F1 | 2018/03/03 01:00 | Gengo Kikuchi v Takuya Kureoka | 6-4,7-6 |
| ITF Japan F8 | 2017/06/15 03:30 | Gengo Kikuchi v Katsuki Nagao | 6-2,6-2 |
| ITF Japan F8 | 2017/06/14 04:00 | Gengo Kikuchi v Yuki Matsuo | 6-0,6-4 |
| ITF Japan F7 | 2017/06/06 01:00 | Gengo Kikuchi v Sora Fukuda | 2-6,2-6 |
| ITF Japan F6 | 2017/06/02 08:15 | Renta Tokuda v Gengo Kikuchi | 4-6,6-1,6-3 |
| ITF Japan F2 | 2018/03/10 04:00 | Yuto Sakai v Bang Shuo Yin | 6-3,6-2 |
| ITF Turkey F7 | 2018/02/20 11:30 | Yuto Sakai v Chun Hsin Tseng | 6-4,2-6,1-6 |
| ITF Turkey F7 | 2018/02/19 08:00 | Yuto Sakai v Kazuki Shimizu | 6-2,6-3 |
| ITF Turkey F7 | 2018/02/18 11:00 | Yuto Sakai v Franco Capalbo | 6-4,6-1 |
| ITF Turkey F7 | 2018/02/18 06:30 | Orlando Luz v Yuto Sakai | 6-1,6-7,4-6 |
| ITF Turkey F6 | 2018/02/11 06:00 | Yuto Sakai v Andrei Stefan Apostol | 6-4,5-7,3-6 |
| ITF Hong Kong F6 | 2017/12/31 03:00 | Yuto Sakai v Alberto Lim | 6-7,4-6 |
| ITF Hong Kong F5 | 2017/12/24 02:00 | Chan-Yeong Oh v Yuto Sakai | 6-3,6-3 |