Stadium: Court 3 Round: 28 Ground: Hardcourt outdoor
| Challenger Yokohama MD | 2018/02/28 04:00 | Rungkat/Zhang v Peng/Siljestrom | 6-2,6-2 |
| Challenger Yokohama MD | 2018/02/26 05:55 | Altuna/Hurkacz v Rungkat/Zhang | 4-6,2-6 |
| Challenger Yokohama MD | 2018/02/28 06:30 | Gong/Hsieh v Kamke/Puetz | 6-7,6-7 |
| Challenger Yokohama MD | 2018/02/27 06:20 | Kamke/Puetz v Balaji/Uchiyama | 6-4,6-3 |
| Challenger Kyoto MD | 2018/02/22 06:45 | Gong/Hsieh v Kamke/Puetz | 6-7,6-2,10-3 |
| Challenger Kyoto MD | 2018/02/20 08:05 | Kamke/Puetz v Purcell/Whittington | 6-4,2-6,10-6 |