Stadium: Court 2 Round: 54 Ground: Hardcourt outdoor
| Challenger Yokohama Qual | 2018/02/24 05:00 | Brydan Klein v Makoto Ochi | 4-6,6-7 |
| Challenger Kyoto Qual | 2018/02/17 02:30 | Makoto Ochi v Ko Suzuki | 6-4,4-6,6-7 |
| ITF Turkey F47 | 2017/12/13 07:15 | Vasile Antonescu v Makoto Ochi | 6-4,7-6 |
| ITF Turkey F46 | 2017/12/07 07:15 | Makoto Ochi v Tak Khunn Wang | 3-6,2-6 |
| ITF Turkey F46 | 2017/12/05 09:50 | Makoto Ochi v Antonio Massara | 3-6,6-1,6-0 |
| ITF Turkey F45 | 2017/12/01 08:55 | Albert Alcaraz Ivorra v Makoto Ochi | 6-2,5-7,6-2 |
| ITF Turkey F45 | 2017/11/30 10:30 | Luca Margaroli v Makoto Ochi | 5-7,6-4,4-6 |
| ITF Turkey F45 | 2017/11/29 11:45 | Cengiz Aksu v Makoto Ochi | 4-6,4-6 |
| 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 05:05 | Masato Shiga v Yunseong Chung | 0-6,5-7 |
| ITF Spain F4 | 2018/02/08 11:00 | Ivan Gakhov v Yunseong Chung | 6-4,6-4 |
| ITF Spain F3 | 2018/01/30 13:40 | Daniel Gimeno-Traver v Yunseong Chung | 6-4,6-1 |
| ITF Spain F2 | 2018/01/27 10:00 | Yunseong Chung v Daniel Munoz-De La Nava | 3-6,4-6 |
| ITF Spain F2 | 2018/01/26 13:00 | Joao Monteiro v Yunseong Chung | 7-6,5-7,3-6 |
| ITF Spain F2 | 2018/01/25 09:00 | Yunseong Chung v Evgeny Tyurnev | 6-4,2-6,6-3 |
| ITF Spain F2 | 2018/01/23 10:35 | Yunseong Chung v Nico Mertens | 6-4,6-3 |