U/21 Boy's Singles Seeds
2013 Japan Open
| Athlete | Country | Seed |
|---|---|---|
| Patrick Franziska | GER | 1 |
| Maharu Yoshimura | JPN | 2 |
| Feng Chen | SIN | 3 |
| Asuka Machi | JPN | 4 |
| Jonathan Groth | DEN | 5 |
| Tzu-Hsiang Hung | TPE | 6 |
| Masaki Yoshida | JPN | 7 |
| Masataka Morizono | JPN | 8 |