Round: 27 Ground: Hardcourt outdoor
| ITF Japan F4 | 2016/03/29 02:00 | Sho Katayama v Yosuke Watanuki | 3-6,1-6 |
| ITF Vietnam F3 | 2017/11/22 03:00 | Sho Katayama v Daniiar Duldaev | 3-6,1-6 |
| ITF Vietnam F3 | 2017/11/21 06:10 | Sho Katayama v Keisuke Numajiri | 6-4,6-4 |
| ITF Vietnam F2 | 2017/11/17 04:35 | Jonathan Gray v Sho Katayama | 6-4,6-1 |
| ITF Vietnam F2 | 2017/11/15 03:00 | Michael Look v Sho Katayama | 3-6,6-7 |
| ITF Vietnam F2 | 2017/11/13 04:00 | Francesco Vilardo v Sho Katayama | 6-7,1-6 |
| ITF Vietnam F1 | 2017/11/09 03:00 | Sho Katayama v Rio Noguchi | 4-6,4-6 |
| ITF Vietnam F1 | 2017/11/07 07:20 | Sho Katayama v Jonathan Gray | 6-3,6-4 |
| ITF Thailand F6 | 2017/08/17 08:30 | Sho Katayama v Blake Ellis | 3-6,2-6 |
| Challenger Toyota | 2017/11/14 04:15 | Yosuke Watanuki v Yasutaka Uchiyama | 4-6,4-6 |
| Challenger Kobe | 2017/11/10 04:40 | Yosuke Watanuki v Soonwoo Kwon | 7-5,3-6,5-7 |
| Challenger Kobe | 2017/11/09 05:15 | Radu Albot v Yosuke Watanuki | 7-5,2-6,0-6 |
| Challenger Kobe | 2017/11/07 04:35 | Yusuke Takahashi v Yosuke Watanuki | 5-7,2-6 |
| Challenger Kobe Qual | 2017/11/06 02:00 | Yosuke Watanuki v Renta Tokuda | 7-6,6-4 |
| Challenger Kobe Qual | 2017/11/05 02:00 | Yosuke Watanuki v Naoki Nakagawa | 6-1,7-6 |
| Challenger Kobe Qual | 2017/11/04 03:40 | Yosuke Watanuki v Itsuki Matsumoto | 6-4,6-3 |
| Challenger Ho Chi Minh City | 2017/10/25 06:40 | Akira Santillan v Yosuke Watanuki | 6-3,6-0 |