2013 Rakuten Japan Open Tennis Championships – Singles
| Singles | |
|---|---|
| 2013 Rakuten Japan Open Tennis Championships | |
| Champion | Juan Martín del Potro |
| Runner-up | Milos Raonic |
| Score | 7–6(7–5), 7–5 |
| Draw | 32 (4Q / 4WC) |
| Seeds | 8 |
Kei Nishikori was the defending champion, but lost in the quarter-finals to Nicolás Almagro.
First-seeded Juan Martín del Potro won the title, defeating Milos Raonic in the final, 7–6(7–5), 7–5.