# 2015 Japan Women's Open – Singles

Samantha Stosur was the defending champion, but chose not to participate.
Yanina Wickmayer won the title, defeating Magda Linette in the final 4–6, 6–3, 6–3.

## Seeds

* Carla Suárez Navarro (first round)
* Zarina Diyas (second round)
* Madison Brengle (quarterfinals)
* Alison Riske (first round)
* Johanna Larsson (second round)
* Christina McHale (semifinals)
* Ajla Tomljanović (semifinals)
* Polona Hercog (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Yanina Wickmayer | 7 | 6 | | | | | |
| 7 | Ajla Tomljanović | 5 | 2 | | | | | |
| 7 | Ajla Tomljanović | 5 | 2 | | Yanina Wickmayer | 4 | 6 | 6 |
| | | | | | Magda Linette | 6 | 3 | 3 |
| 6 | Christina McHale | 6 | 4 | 3 | Magda Linette | 6 | 3 | 3 |
| | Magda Linette | 3 | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | C Suárez Navarro | 4 | 4 | | | | | | | | | | | | | | | |
| | K Bondarenko | 6 | 6 | | | K Bondarenko | 6 | 3 | 6 | | | | | | | | | |
| | J Gajdošová | 6 | 6 | | | J Gajdošová | 1 | 6 | 4 | | | | | | | | | |
| Q | A Panova | 3 | 4 | | | | | | | | K Bondarenko | 6 | 3 | 4 | | | | |
| | K Siniaková | 4 | 3 | | | | | | | | Y Wickmayer | 3 | 6 | 6 | | | | |
| | Y Wickmayer | 6 | 6 | | | Y Wickmayer | 7 | 6 | | | | | | | | | | |
| | Q Wang | 6 | 3 | 3 | 5 | J Larsson | 5 | 3 | | | | | | | | | | |
| 5 | J Larsson | 0 | 6 | 6 | | | | | | | | | | | | Y Wickmayer | 7 | 6 |
| 3 | M Brengle | 6 | 6 | | | | | | | | | | | | 7 | A Tomljanović | 5 | 2 |
| | A-L Friedsam | 3 | 1 | | 3 | M Brengle | 6 | 6 | | | | | | | | | | |
| WC | N Hibino | 3 | 6 | 6 | WC | N Hibino | 1 | 2 | | | | | | | | | | |
| Q | H Kuwata | 6 | 4 | 4 | | | | | | 3 | M Brengle | 6 | 3 | 4 | | | | |
| WC | K Date-Krumm | 6 | 6 | | | | | | | 7 | A Tomljanović | 1 | 6 | 6 | | | | |
| | M Doi | 4 | 2 | | WC | K Date-Krumm | 6$^5$ | 3 | | | | | | | | | | |
| | T Babos | 6 | 4 | 6$^2$ | 7 | A Tomljanović | 7$^7$ | 6 | | | | | | | | | | |
| 7 | A Tomljanović | 3 | 6 | 7$^7$ | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | C McHale | 6 | 7 | | | | | | | | | | | | | | | |
| | Y Putintseva | 3 | 5 | | 6 | C McHale | 6 | 7 | | | | | | | | | | |
| | B Jovanovski | 1 | 1 | | Q | R Ozaki | 1 | 5 | | | | | | | | | | |
| Q | R Ozaki | 6 | 6 | | | | | | 6 | C McHale | 2 | 6 | 6 | | | | | |
| Q | N Osaka | 7 | 5 | 3 | | | | | | S Zheng | 6 | 3 | 3 | | | | | |
| | I Falconi | 5 | 7 | 6 | | I Falconi | 4 | 2 | | | | | | | | | | |
| | S Zheng | 0 | 6 | 6 | | S Zheng | 6 | 6 | | | | | | | | | | |
| 4 | A Riske | 6 | 4 | 1 | | | | | | | | | | 6 | C McHale | 6 | 4 | 3 |
| 8 | P Hercog | 1 | 7 | 5 | | | | | | | | | | | M Linette | 3 | 6 | 6 |
| | S-w Hsieh | 6 | 5 | 7 | | S-w Hsieh | 6 | 6 | | | | | | | | | | |
| | A Mitu | 1 | 4 | | | K Nara | 2 | 4 | | | | | | | | | | |
| | K Nara | 6 | 6 | | | | | | | S-w Hsieh | 3 | 3 | | | | | | |
| | M Linette | 6 | 6 | | | | | | | M Linette | 6 | 6 | | | | | | |
| | L Davis | 3 | 2 | | | M Linette | 6 | 7 | | | | | | | | | | |
| | K Bertens | 4 | 4 | | 2 | Z Diyas | 2 | 5 | | | | | | | | | | |
| 2 | Z Diyas | 6 | 6 | | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Kristýna Plíšková (second round)
* Patricia Maria Țig (qualifying competition)
* María Teresa Torró Flor (qualifying competition; retired)
* Wang Yafan (second round)
* Alexandra Panova (qualified)
* Stefanie Vögele (first round)
* Risa Ozaki (qualified)
* Petra Martić (withdrew, still playing in Dalian)

### Qualifiers

* Hiroko Kuwata
* Alexandra Panova
* Risa Ozaki
* Naomi Osaka

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Kristýna Plíšková | 6 | 7 | | | | | | | | | |
| | Eri Hozumi | 4 | 5 | | | | | | | | | |
| | Eri Hozumi | 4 | 5 | | 1 | Kristýna Plíšková | 2 | 3 | | | | |
| | | | | | | Shuko Aoyama | 6 | 6 | | | | |
| | Shuko Aoyama | 6 | 7 | | | Shuko Aoyama | 6 | 6 | | | | |
| WC | Chihiro Muramatsu | 0 | 5 | | | | | | | | | |
| WC | Chihiro Muramatsu | 0 | 5 | | | | | | Shuko Aoyama | 4 | 6 | 6$^6$ |
| | | | | | | | | | Hiroko Kuwata | 6 | 4 | 7$^8$ |
| Alt | Olga Savchuk | 6 | 6 | | | | | | | | | | Hiroko Kuwata | 6 | 4 | 7$^8$ |
| | Sara Sorribes Tormo | 2 | 2 | | | | | | | | | |
| | Sara Sorribes Tormo | 2 | 2 | | Alt | Olga Savchuk | 2 | 1 | | | | |
| | | | | | | Hiroko Kuwata | 6 | 6 | | | | |
| | Hiroko Kuwata | 5 | 6 | 6 | | Hiroko Kuwata | 6 | 6 | | | | |
| 6 | Stefanie Vögele | 7 | 0 | 4 | | | | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Patricia Maria Țig | 6 | 7$^7$ | | | | | | | | | |
| | Paula Badosa Gibert | 3 | 6$^5$ | | | | | | | | | |
| | Paula Badosa Gibert | 3 | 6$^5$ | | 2 | Patricia Maria Țig | 6 | 6 | | | | |
| | | | | | WC | Miyabi Inoue | 1 | 3 | | | | |
| WC | Miyabi Inoue | 7$^7$ | 0 | 6 | WC | Miyabi Inoue | 1 | 3 | | | | |
| | Han Na-lae | 6$^5$ | 6 | 2 | | | | | | | | |
| | Han Na-lae | 6$^5$ | 6 | 2 | | | | | 2 | Patricia Maria Țig | 4 | 3 |
| | | | | | | | | | 5 | Alexandra Panova | 6 | 6 |
| Alt | Jang Su-jeong | 6$^2$ | 0 | | | | | | | | | | 5 | Alexandra Panova | 6 | 6 |
| WC | Makoto Ninomiya | 7$^7$ | 6 | | | | | | | | | |
| WC | Makoto Ninomiya | 7$^7$ | 6 | | WC | Makoto Ninomiya | 1 | 3 | | | | |
| | | | | | 5 | Alexandra Panova | 6 | 6 | | | | |
| | Katarzyna Piter | 6$^5$ | 6$^5$ | | 5 | Alexandra Panova | 6 | 6 | | | | |
| 5 | Alexandra Panova | 7$^7$ | 7$^7$ | | | | | | | | | |

#### Third qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | María Teresa Torró Flor | 6 | 6 | | | | | | | | |
| | Sorana Cîrstea | 3 | 4 | | | | | | | | |
| | Sorana Cîrstea | 3 | 4 | | 3 | María Teresa Torró Flor | 6 | 6 | | | |
| | | | | | WC | Erika Sema | 2 | 0 | | | |
| | Gabriela Dabrowski | 7$^8$ | 2 | 4 | WC | Erika Sema | 2 | 0 | | | |
| WC | Erika Sema | 6$^6$ | 6 | 6 | | | | | | | |
| WC | Erika Sema | 6$^6$ | 6 | 6 | | | | | 3 | María Teresa Torró Flor | 0$^r$ |
| | | | | | | | | | 7 | Risa Ozaki | 2 |
| | Yang Zhaoxuan | 6 | 2 | 6 | | | | | | | | 7 | Risa Ozaki | 2 |
| | Riko Sawayanagi | 2 | 6 | 3 | | | | | | | |
| | Riko Sawayanagi | 2 | 6 | 3 | | Yang Zhaoxuan | 6$^3$ | 2 | | | |
| | | | | | 7 | Risa Ozaki | 7$^7$ | 6 | | | |
| | Tereza Martincová | 4 | 4 | | 7 | Risa Ozaki | 7$^7$ | 6 | | | |
| 7 | Risa Ozaki | 6 | 6 | | | | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Wang Yafan | 6 | 6 | | | | | | | | | |
| | Miyu Kato | 0 | 1 | | | | | | | | | |
| | Miyu Kato | 0 | 1 | | 4 | Wang Yafan | 3 | 1 | | | | |
| | | | | | | Naomi Osaka | 6 | 6 | | | | |
| | Junri Namigata | 4 | 3 | | | Naomi Osaka | 6 | 6 | | | | |
| | Naomi Osaka | 6 | 6 | | | | | | | | | |
| | Naomi Osaka | 6 | 6 | | | | | | | Naomi Osaka | 7$^8$ | 6 |
| | | | | | | | | | | Luksika Kumkhum | 6$^6$ | 1 |
| | Luksika Kumkhum | 4 | 7 | 6 | | | | | | | | | Luksika Kumkhum | 6$^6$ | 1 |
| | Misa Eguchi | 6 | 5 | 4 | | | | | | | | |
| | Misa Eguchi | 6 | 5 | 4 | | Luksika Kumkhum | 7$^9$ | 3 | 6 | | | |
| | | | | | | Xu Yifan | 6$^7$ | 6 | 3 | | | |
| | Xu Yifan | 6 | 6 | | | Xu Yifan | 6$^7$ | 6 | 3 | | | |
| Alt | Ankita Raina | 0 | 3 | | | | | | | | | |