Round: 44 Ground: Hardcourt outdoor
| ITF Japan F1 | 2017/03/04 01:00 | Sota Fujii v Yuta Kawahashi | 4-6,6-3,2-6 |
| ITF Japan F6 Qual | 2016/05/29 01:00 | Ryota Kishi v Yuta Kawahashi | 6-2,6-4 |
| ITF Japan F5 | 2016/04/08 01:00 | Yuta Kawahashi v Sho Katayama | 1-6,2-6 |
| ITF Japan F5 | 2016/04/06 00:30 | Yuta Kawahashi v Masayoshi Ono | 6-2,6-2 |
| ITF Japan F5 | 2016/04/04 00:30 | Yuta Kawahashi v Taiki Hashimoto | 6-2,7-6 |
| ITF Japan F5 | 2016/04/03 02:00 | Ken Onoda v Yuta Kawahashi | 5-7,2-6 |
| ITF Japan F4 | 2016/03/27 03:00 | Yuta Kawahashi v Brandon Walkin | 4-6,3-6 |
| ITF Japan F1 | 2017/03/06 01:00 | Kaito Itsusaki v Keisuke Watanuki | 6-3,6-3 |
| ITF Japan F1 | 2017/03/05 01:00 | Masaki Osafune v Keisuke Watanuki | 6-7,6-0,2-6 |
| ITF Japan F8 | 2016/06/16 02:15 | Keisuke Watanuki v Sho Katayama | 3-6,1-6 |
| ITF Japan F8 | 2016/06/15 04:30 | Shunrou Takeshima v Keisuke Watanuki | 6-7,0-6 |
| ITF Japan F7 | 2016/06/09 02:30 | Chan-Yeong Oh v Keisuke Watanuki | 6-3,6-7,6-4 |
| ITF Japan F7 | 2016/06/07 01:00 | Keisuke Watanuki v Takuto Niki | 6-4,7-6 |
| ITF Japan F6 | 2016/05/31 05:25 | Yusuke Takahashi v Keisuke Watanuki | 6-3,6-4 |
| ITF Japan F6 Qual | 2016/05/29 04:00 | Keisuke Watanuki v Sho Shimabukuro | 6-1,6-0 |