Stadium: Court C Round: 62 Ground: Hardcourt outdoor
| ITF Japan F1 | 2018/03/03 01:00 | Kosuke Okagaki v Naoto Kai | 6-4,0-6,2-6 |
| Challenger Yokohama Qual | 2018/02/24 03:55 | Takanyi Garanganga v Naoto Kai | 6-3,4-6,7-6 |
| ITF Japan F8 | 2017/06/10 05:00 | Steven Goh v Naoto Kai | 6-3,6-2 |
| ITF Japan F7 | 2017/06/06 01:00 | Shintaro Imai v Naoto Kai | 6-1,6-2 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Ibuki Furuta v Naoto Kai | 6-2,6-0 |
| ITF Japan F4 | 2017/03/25 00:00 | Yuki Nakamura v Naoto Kai | 6-4,4-6,6-1 |
| ITF Japan F1 | 2017/03/04 03:30 | Ibuki Furuta v Naoto Kai | 6-2,6-0 |
| ITF Japan F7 | 2016/06/06 01:00 | Ryota Tanuma v Naoto Kai | 6-4,6-3 |
| ITF Japan F1 | 2018/03/03 01:00 | Teppei Uesugi v Kaito Itsusaki | 7-6,0-6,2-6 |
| Challenger Yokohama | 2018/02/27 01:00 | Go Soeda v Kaito Itsusaki | 6-0,6-2 |
| Challenger Kyoto Qual | 2018/02/17 07:50 | Kaito Itsusaki v Takuto Niki | 4-6,0-6 |
| ITF Japan F7 | 2017/06/03 01:00 | Kaito Itsusaki v Teppei Uesugi | 6-7,6-1,3-6 |
| ITF Japan F6 | 2017/05/31 01:00 | Kaito Itsusaki v Shintaro Imai | 6-3,1-6,3-6 |
| ITF Japan F6 | 2017/05/29 04:00 | Yosuke Watanuki v Kaito Itsusaki | 1-6,7-6,1-6 |
| ITF Japan F5 | 2017/04/01 01:00 | Kaito Itsusaki v Masamichi Imamura | 3-6,4-6 |
| ITF Japan F4 | 2017/03/29 01:00 | Gengo Kikuchi v Kaito Itsusaki | 6-4,6-3 |