2019 Japan Women's Open

The 2019 Japan Women's Open was a women's tennis tournament played on outdoor hard courts. It was the eleventh edition of the Japan Women's Open, and part of the WTA International tournaments of the 2019 WTA Tour. It was held at the Regional Park Tennis Stadium in Hiroshima, Japan, from September 9 through September 15, 2019.

Prize money
1 Qualifiers prize money is also the Round of 32 prize money 2 Per team

Seeds

 * Rankings are as of August 26, 2019

Other entrants
The following players received wildcards into the singles main draw:
 * 🇯🇵 Kurumi Nara
 * 🇯🇵 Risa Ozaki
 * 🇯🇵 Ayano Shimizu

The following players received entry from the qualifying draw:
 * 🇨🇦 Leylah Annie Fernandez
 * 🇦🇺 Zoe Hives
 * 🇯🇵 Junri Namigata
 * 🇷🇺 Valeria Savinykh
 * 🇷🇴 Patricia Maria Țig
 * 🇧🇬 Viktoriya Tomova

Withdrawals

 * Before the tournament
 * 🇦🇺 Daria Gavrilova → replaced by 🇦🇺 Priscilla Hon
 * 🇨🇿 Barbora Krejčíková → replaced by 🇯🇵 Nao Hibino
 * 🇸🇰 Anna Karolína Schmiedlová → replaced by 🇵🇱 Katarzyna Kawa

Retirements

 * During the tournament
 * 🇰🇿 Zarina Diyas (low back injury)

Seeds

 * 1 Rankings are as of August 26, 2019

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇯🇵 Erina Hayashi / 🇯🇵 Moyuka Uchijima
 * 🇯🇵 Kyōka Okamura / 🇯🇵 Ayano Shimizu

Retirements

 * 🇧🇪 Greet Minnen (right shoulder injury)

Singles

 * 🇯🇵 Nao Hibino def. 🇯🇵 Misaki Doi, 6–3, 6–2

Doubles

 * 🇯🇵 Misaki Doi / 🇯🇵 Nao Hibino def. 🇺🇸 Christina McHale / 🇷🇺 Valeria Savinykh, 3–6, 6–4, [10–4]