Stadium: Court 4 Round: 24 Ground: Hardcourt outdoor
| Challenger Yokohama Qual | 2018/02/25 02:35 | Yunseong Chung v Takuto Niki | 6-7,6-3,6-3 |
| Challenger Kyoto Qual | 2017/02/18 05:25 | Yunseong Chung v Takuto Niki | 2-6,6-7 |
| ITF Japan F2 | 2016/03/15 02:25 | Takuto Niki v Yunseong Chung | 3-6,6-3,3-6 |