Stadium: Court 14 Round: 54
| Challenger Yokohama Qual | 2017/02/25 01:00 | Brydan Klein v Renta Tokuda | 2-6,7-5,6-1 |
| Challenger Gimcheon Qual | 2018/05/06 04:30 | Renta Tokuda v Young Seok Kim | 6-3,6-2 |
| Challenger Seoul | 2018/05/01 06:30 | Renta Tokuda v Tsung-Hua Yang | 1-6,2-6 |
| Challenger Seoul Qual | 2018/04/30 05:00 | Renta Tokuda v Jacob Grills | 6-3,6-2 |
| Challenger Seoul Qual | 2018/04/29 04:55 | Renta Tokuda v Yong-Kyu Lim | 6-4,6-4 |
| ITF Japan F6 | 2018/04/15 04:00 | Hiroyasu Ehara v Renta Tokuda | 0-6,6-7 |
| ITF Japan F6 | 2018/04/14 01:00 | Renta Tokuda v Makoto Ochi | 6-2,6-2 |
| ITF Japan F6 | 2018/04/13 03:15 | Renta Tokuda v Jumpei Yamasaki | 4-6,6-2,6-4 |
| ITF Japan F6 | 2018/04/10 02:45 | Renta Tokuda v Sho Shimabukuro | 6-4,4-6,6-2 |
| Challenger Gimcheon Qual | 2018/05/06 05:50 | Jinseok Yu v Brydan Klein | 3-6,4-6 |
| Challenger Puerto Vallarta | 2018/05/01 19:05 | Brydan Klein v Felipe Mantilla | 4-6,7-6,1-6 |
| Challenger Guadalajara Qual | 2018/04/15 20:05 | Brydan Klein v James Ward | 5-7,4-6 |
| Challenger Guadalajara Qual | 2018/04/14 22:10 | Andrew Harris v Brydan Klein | 2-6,7-5,6-7 |
| ITF Japan F1 | 2018/03/07 06:00 | Soichiro Moritani v Brydan Klein | 7-6,7-5 |
| Challenger Yokohama Qual | 2018/02/24 05:00 | Brydan Klein v Makoto Ochi | 4-6,6-7 |
| Challenger Kyoto | 2018/02/21 01:30 | John Millman v Brydan Klein | 7-6,6-7,6-3 |
| Challenger Kyoto | 2018/02/20 01:30 | Brydan Klein v Ze Zhang | 6-3,3-6,7-6 |