The 2014 Japan Women's Open was a women's tennis tournament played on outdoor hard courts. It was the sixth edition of the Japan Women's Open, and part of the WTA International tournaments of the 2014 WTA Tour. It was held at the Utsubo Tennis Center in Osaka, Japan, from October 6 through October 12, 2014. First-seeded Samantha Stosur won the singles title.
Finals
Singles
Samantha Stosur defeated 
Zarina Diyas, 7–6(9–7), 6–3
- It was Stosur's 1st title of the year, her 3rd title at the HP Open, and the 6th title of her career.
Doubles
Shuko Aoyama / 
Renata Voráčová defeated 
Lara Arruabarrena / 
Tatjana Maria, 6–1, 6–2
Points and prize money
Point distribution
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Q | Q3 | Q2 | Q1 |
| Singles | 280 | 180 | 110 | 60 | 30 | 1 | 18 | 14 | 10 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 1 | — | — | — | — | — |
Prize money
| Event | W | F | SF | QF | Round of 16 | Round of 321 | Q3 | Q2 | Q1 |
| Singles | $43,000 | $21,400 | $11,300 | $5,900 | $3,310 | $1,925 | $1,005 | $730 | $530 |
| Doubles | $12,300 | $6,400 | $3,435 | $1,820 | $960 | — | — | — | — |
| Doubles prize money per team | |||||||||
1 Qualifiers prize money is also the Round of 32 prize money
Singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| AUS
|
Samantha Stosur | 21 | 1 |
 USA
|
Madison Keys | 32 | 2 |
 UKR
|
Elina Svitolina | 33 | 3 |
| USA
|
CoCo Vandeweghe | 38 | 4 |
| KAZ
|
Zarina Diyas | 39 | 5 |
 GBR
|
Heather Watson | 47 | 6 |
| USA
|
Christina McHale | 52 | 7 |
| USA
|
Lauren Davis | 55 | 8 |
- Rankings are as of September 29, 2014
Other entrants
The following players received wildcards into the singles main draw:
The following player received entry using a protected ranking into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Withdrawals
- Before the tournament
- Kimiko Date-Krumm → replaced by Erika Sema
- Casey Dellacqua (lower leg injury) → replaced by Tatjana Maria
- Julia Görges → replaced by Misa Eguchi
- Kurumi Nara (respiratory illness) → replaced by Miharu Imanishi
Paula Ormaechea → replaced by Bethanie Mattek-Sands
Alison Van Uytvanck → replaced by Sachia Vickery
Retirements
- Jarmila Gajdošová (left ankle sprain)
- Madison Keys (right rib injury)
Doubles main-draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
 TPE
|
Chan Hao-ching | TPE
|
Chan Yung-jan | 59 | 1 |
 POL
|
Klaudia Jans-Ignacik |  FRA
|
Kristina Mladenovic | 79 | 2 |
| USA
|
Lisa Raymond | AUS
|
Samantha Stosur | 84 | 3 |
 CRO
|
Darija Jurak | USA
|
Megan Moulton-Levy | 114 | 4 |
- 1 Rankings are as of September 29, 2014
Other entrants
The following pairs received wildcards into the doubles main draw:
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