Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF Japan F1 | 2018/03/10 02:00 | Daniel Nguyen v Takuto Niki | 6-3,6-4 |
| ITF Japan F1 | 2018/03/09 02:00 | Takuto Niki v Soichiro Moritani | 6-1,6-4 |
| ITF Japan F1 | 2018/03/08 03:10 | Takuto Niki v Yuya Kibi | 6-3,7-5 |
| ITF Japan F1 | 2018/03/07 04:45 | Takuto Niki v Naoya Maesaki | 6-2,6-7,6-2 |
| Challenger Yokohama Qual | 2018/02/25 02:35 | Yunseong Chung v Takuto Niki | 6-7,6-3,6-3 |
| Challenger Yokohama Qual | 2018/02/24 07:05 | Takuto Niki v N.Sriram Balaji | 3-6,7-6,7-5 |
| Challenger Kyoto Qual | 2018/02/19 03:45 | Blake Ellis v Takuto Niki | 6-3,6-4 |
| Challenger Kyoto Qual | 2018/02/18 06:05 | Masaki Osafune v Takuto Niki | 3-6,2-6 |
| ITF Korea F5 | 2017/06/27 01:30 | Sang Yeop Kim v A-Ram Kim | 6-7,4-6 |
| ITF Korea F4 | 2017/06/20 04:30 | Sang Yeop Kim v Cheong-Eui Kim | 0-6,2-6 |
| ITF Korea F4 | 2017/06/19 01:00 | Sang Yeop Kim v Geon Ju Shin | 6-3,6-4 |
| ITF Korea F4 | 2017/06/18 01:00 | Dae-Hee Lee v Sang Yeop Kim | 3-6,4-6 |
| ITF Korea F4 | 2017/06/17 01:00 | Donghwi Shin v Sang Yeop Kim | 2-6,2-6 |
| ITF Korea F3 Qual | 2017/06/12 03:00 | Hyun-Joon Kim v Sang Yeop Kim | 6-0,6-1 |
| ITF Korea F3 Qual | 2017/06/10 03:00 | Sung Jun Park v Sang Yeop Kim | 2-6,2-6 |
| ITF Korea F2 | 2017/06/08 03:30 | Sang Yeop Kim v Cheong-Eui Kim | 2-6,1-6 |