:2017 Toray Pan Pacific Open

{{Infobox tennis event|2017|Toray Pan Pacific Open|

| date = 18–24 September

| edition = 34th

| category = WTA Premier

| draw = 28S / 16D

| prize_money = $1,000,000

| surface = Hard / outdoor

| location = Tokyo, Japan

| venue = Ariake Forest Park

| champs = {{flagicon|DEN}} Caroline Wozniacki

| champd = {{flagicon|SLO}} Andreja Klepač / {{flagicon|ESP}} María José Martínez Sánchez

| main_name = Pan Pacific Open

|attendance=30,000}}

The 2017 Toray Pan Pacific Open was a women's tennis tournament played on outdoor hard courts. It was the 34th edition of the Pan Pacific Open, and part of the Premier Series of the 2017 WTA Tour. It took place at the Ariake Coliseum in Tokyo, Japan, on 18–24 September 2017.

Points and prize money

=Point distribution=

class=wikitable style=font-size:90%;text-align:center
style="width:130px; background:#efefef;"\|Event \|style="width:80px; background:lime;"\|{{Tooltip\|W\|Win}} \|style="width:85px; background:thistle;"\|{{Tooltip\| F \| Final}} \|style="width:85px; background:#ff0;"\|{{Tooltip\| SF \| Semifinal}} \|style="width:85px; background:#ffebcd;"\|{{Tooltip\| QF \| Quarterfinal}} \|style="width:85px; background:#afeeee;"\|Round of 16 \|style="width:85px; background:#afeeee;"\|Round of 32 \|width=85\|{{Tooltip\| Q \| Qualifier}} \|width=85\|{{Tooltip\| Q3 \| Qualifying round 3}} \|width=85\|{{Tooltip\| Q2 \| Qualifying round 2}} \|width=85\|{{Tooltip\| Q1 \| Qualifying round 1}}
style="background:#f8f8f8;"\|Singles{{cite web\|url=http://www.wtatennis.com/all-about-rankings \|access-date=21 August 2015 \|title=Rankings explained \|publisher=WTA \|url-status=dead \|archive-url=https://web.archive.org/web/20121214232116/http://www.wtatennis.com/all-about-rankings \|archive-date=14 December 2012 }} \|rowspan=2\|470 \|rowspan=2\|305 \|rowspan=2\|185 \|rowspan=2\|100 \|55 \|1 \|25 \|18 \|13 \|1
style="background:#f8f8f8;"\|Doubles \|1 \|{{n/a}} \|{{n/a}} \|{{n/a}} \|{{n/a}} \|{{n/a}}

class=wikitable style=font-size:90%;text-align:center

style="width:130px; background:#efefef;"|Event

|style="width:80px; background:lime;"|{{Tooltip|W|Win}}

|style="width:85px; background:thistle;"|{{Tooltip| F | Final}}

|style="width:85px; background:#ff0;"|{{Tooltip| SF | Semifinal}}

|style="width:85px; background:#ffebcd;"|{{Tooltip| QF | Quarterfinal}}

|style="width:85px; background:#afeeee;"|Round of 16

|style="width:85px; background:#afeeee;"|Round of 32

|width=85|{{Tooltip| Q | Qualifier}}

|width=85|{{Tooltip| Q3 | Qualifying round 3}}

|width=85|{{Tooltip| Q2 | Qualifying round 2}}

|width=85|{{Tooltip| Q1 | Qualifying round 1}}

style="background:#f8f8f8;"|Singles{{cite web|url=http://www.wtatennis.com/all-about-rankings |access-date=21 August 2015 |title=Rankings explained |publisher=WTA |url-status=dead |archive-url=https://web.archive.org/web/20121214232116/http://www.wtatennis.com/all-about-rankings |archive-date=14 December 2012 }}

|rowspan=2|470

|rowspan=2|305

|rowspan=2|185

|rowspan=2|100

|55

|25

|18

|13

style="background:#f8f8f8;"|Doubles

|{{n/a}}

=Prize money=

class=wikitable style=font-size:90%;text-align:center

width=130 bgcolor=efefef|Event

|width=80 bgcolor=lime|W

|width=85 bgcolor=thistle|F

|width=85 bgcolor=ffff00|SF

|width=85 bgcolor=ffebcd|QF

|width=85 bgcolor=afeeee|Round of 16

|width=85 bgcolor=afeeee|Round of 32{{ref|R32money|*}}

|width=85|Q3

|width=85|Q2

|width=85|Q1

style="background:#f8f8f8;"|Singles

|$193,850

|$103,504

|$55,287

|$22,518

|$12,077

|$7,662

|$3,442

|$1,830

|$1,018

style="background:#f8f8f8;"|Doubles

|$45,940

|$24,548

|$13,414

|$6,822

|$3,705

|{{n/a}}

colspan=10|Doubles prize money per team

{{note|R32money|*|Qualifiers prize money is also the round of 32 prize money}}

Singles main-draw entrants

=Seeds=

class="sortable wikitable"
width="60"\| Country ! width="175"\| Player ! Rank ! Seeds
{{flag\|ESP}} \|Garbiñe Muguruza \|1 \|1
{{flag\|CZE}} \|Karolína Plíšková \|4 \|2
style="background:#cfc;" \|{{flag\|DEN}} \|Caroline Wozniacki \|6 \|3
{{flag\|GBR}} \|Johanna Konta \|7 \|4
{{flag\|SVK}} \|Dominika Cibulková \|9 \|5
~~{{flag\|POL}}~~ \|~~Agnieszka Radwańska~~ \|11 \|6
{{flag\|GER}} \|Angelique Kerber \|14 \|7
{{flag\|FRA}} \|Kristina Mladenovic \|15 \|8
{{flag\|FRA}} \|Caroline Garcia \|20 \|9

class="sortable wikitable"

width="60"| Country

! width="175"| Player

! Rank

! Seeds

|Garbiñe Muguruza

|Karolína Plíšková

style="background:#cfc;"

|{{flag|DEN}}

|Caroline Wozniacki

|Johanna Konta

|Dominika Cibulková

~~{{flag|POL}}~~

|~~Agnieszka Radwańska~~

|11

|Angelique Kerber

|14

|Kristina Mladenovic

|15

|Caroline Garcia

|20

Rankings are as of September 11, 2017

=Other entrants=

The following players received wild cards into the main singles draw:

{{flagicon|JPN}} Risa Ozaki
{{flagicon|JPN}} Kurumi Nara

The following players received entry from the singles qualifying draw:

{{flagicon|USA}} Madison Brengle
{{flagicon|SVK}} Jana Čepelová
{{flagicon|POL}} Magda Linette
{{flagicon|TPE}} Hsieh Su-wei

The following player received entry as a lucky loser:

{{flagicon|BLR}} Aliaksandra Sasnovich

=Withdrawals=

;Before the tournament

{{flagicon|USA}} Lauren Davis → replaced by {{flagicon|CHN}} Wang Qiang
{{flagicon|USA}} Madison Keys → replaced by {{flagicon|KAZ}} Yulia Putintseva
{{flagicon|CRO}} Ana Konjuh → replaced by {{flagicon|JPN}} Naomi Osaka
{{flagicon|CZE}} Petra Kvitová → replaced by {{flagicon|CZE}} Kateřina Siniaková
{{flagicon|CRO}} Mirjana Lučić-Baroni → replaced by {{flagicon|USA}} Catherine Bellis
{{flagicon|POL}} Agnieszka Radwańska → replaced by {{flagicon|BLR}} Aliaksandra Sasnovich
{{flagicon|LAT}} Anastasija Sevastova → replaced by {{flagicon|RUS}} Daria Kasatkina

Doubles main-draw entrants

=Seeds=

class="sortable wikitable"
width="70"\| Country ! width="175"\| Player ! width="70"\| Country ! width="175"\| Player ! Rank¹ ! Seed
{{flag\|TPE}} \|Chan Hao-ching \|{{flag\|TPE}} \|Chan Yung-jan \|15 \|1
{{flag\|CAN}} \|Gabriela Dabrowski \|{{flag\|CHN}} \|Xu Yifan \|38 \|2
{{flag\|POL}} \|Alicja Rosolska \|{{flagu\|USA}} \|Abigail Spears \|57 \|3
style="background:#cfc;" \|{{flag\|SLO}} \|Andreja Klepač \|{{flag\|ESP}} \|María José Martínez Sánchez \|60 \|4

class="sortable wikitable"

width="70"| Country

! width="175"| Player

! width="70"| Country

! width="175"| Player

! Rank¹

! Seed

|Chan Hao-ching

|{{flag|TPE}}

|Chan Yung-jan

|15

|Gabriela Dabrowski