The 2013 HP Open was a women's tennis tournament played on outdoor hard courts sponsored by Hewlett-Packard. It was the fifth edition of the HP Open, and part of the WTA International tournaments of the 2013 WTA Tour. It was held at the Utsubo Tennis Center in Osaka, Japan, from October 7 through October 13, 2013.
See main article: 2013 HP Open – Singles. 
Samantha Stosur defeated 
Eugenie Bouchard, 3–6, 7–5, 6–2
See main article: 2013 HP Open – Doubles. 
Kristina Mladenovic / 
Flavia Pennetta defeated Samantha Stosur / 
Zhang Shuai, 6–4, 6–3
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Serbia | ||||
| Sabine Lisicki | 16 | 2 | ||
| Australia | Samantha Stosur | 20 | 3 | |
| Italy | Flavia Pennetta | 29 | 4 | |
| Canada | Eugenie Bouchard | 36 | 5 | |
| Madison Keys | 40 | 6 | ||
 United Kingdom | Laura Robson | 41 | 7 | |
| Monica Puig | 45 | 8 | ||
| France | Kristina Mladenovic | 47 | 9 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Marina Erakovic
Jamie Hampton Jelena Janković (left hip injury) Bethanie Mattek-Sands
Shahar Pe'er (planta fascia injury)
Yaroslava Shvedova Galina Voskoboeva Venus Williams| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Raquel Kops-Jones | Abigail Spears | 44 | 1 | |||
| France | Kristina Mladenovic | Italy | Flavia Pennetta | 66 | 2 | |
| Varvara Lepchenko | China | Zheng Saisai | 81 | 3 | ||
 Spain | Anabel Medina Garrigues | Spain | Sílvia Soler Espinosa | 81 | 4 |
The following pairs received wildcards into the doubles main draw:
Varvara Lepchenko (gastrointestinal illness)
