| 2009 HP Open | |
|---|---|
| Date | 12–18 October |
| Edition | 1st |
| Category | WTA International |
| Surface | Hard / outdoor |
| Location | Osaka, Japan |
| Champions | |
| Singles | |
 Samantha Stosur | |
| Doubles | |
 Chuang Chia-jung /  Lisa Raymond | |
The 2009 HP Open (also known as the 2009 HP Japan Women's Open Tennis) was a women's tennis tournament played on outdoor hard courts. It was the 1st edition of the HP Open, and was classified as an WTA International tournaments of the 2009 WTA Tour. It was played in Osaka, Japan.
Samantha Stosur defeated 
Francesca Schiavone 7–5, 6–1
Chuang Chia-jung / Lisa Raymond defeated 
Chanelle Scheepers / Abigail Spears 6–2, 6–4
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 DEN | Caroline Wozniacki | 5 | 1 |
 FRA | Marion Bartoli | 13 | 2 |
| AUS | Samantha Stosur | 14 | 3 |
| ITA | Francesca Schiavone | 26 | 4 |
 ISR | Shahar Pe'er | 34 | 5 |
 CAN | Aleksandra Wozniak | 35 | 6 |
 HUN | Melinda Czink | 40 | 7 |
 KAZ | Yaroslava Shvedova | 50 | 8 |
seeds are based on the rankings of October 5, 2009
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received a lucky loser spot:
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