Jarmila Wolfe is a Slovak-Australian former tennis player.
Meghann Shaughnessy was the defending champion, but chose not to play that year.
Yan Zi and Zheng Jie were the defending champions, but neither chose to compete that year.
Makoto Ninomiya and Riko Sawayanagi were the defending champions, but lost in the first round to Miki Miyamura and Varatchaya Wongteanchai.
Han Xinyun and Sun Shengnan were the defending champions, having won the event in 2012, but Han chose not to defend her title. Sun partnered up with Hsu Chieh-yu, but withdrew in the semifinals.
Luksika Kumkhum and Erika Sema were the defending champions, having won the event in 2013, but Kumkhum chose not to participate. Sema partnered with her sister Yurika Sema, but they lost in the first round.
Junri Namigata and Erika Sema were the defending champions, having won the event in 2013, however both players chose to defend their titles with different partners. Namigata partnered with Akiko Yonemura but lost in the quarterfinals whilst Sema partnered with Miki Miyamura but lost in the first round.
Julie Coin and Stéphanie Foretz Gacon were the defending champions, but Coin chose not to participate. Foretz Gacon partnered with Amandine Hesse, but they lost in the semifinals.
Petra Kvitová was the defending champion, but chose not to participate this year.
Peng Shuai and Zhang Shuai were the defending champions, however Peng chose not to participate. Zhang partnered with Chuang Chia-jung, but lost in the first round to Anastasia Rodionova and Vera Zvonareva.
Chan Hao-ching and Chan Yung-jan won the title, defeating Shuko Aoyama and Tamarine Tanasugarn in the final, 2–6, 6–4, [10–3].
Venus Williams was the defending champion, but lost in the third round to Lucie Šafářová.
Jarmila Gajdošová and Arina Rodionova were the defending champions, but chose not to participate.
Jarmila Gajdošová and Arina Rodionova were the defending champions, but both players chose to participate at the 2015 Internazionali BNL d'Italia.
Makoto Ninomiya and Riko Sawayanagi were the defending champions, but Sawayanagi chose not to participate. Ninomiya partnered Robu Kajitani, but lost in the quarterfinals.
Liang Chen and Lu Jingjing were the defending champions, but chose not to compete together. Lu played alongside You Xiaodi, but lost in the quarterfinals to Liang and Ye Qiuyu. Liang and Ye then lost in the semifinals to Jiang Xinyu and Tang Qianhui.
Natela Dzalamidze and Veronika Kudermetova were the defending champions, but Dzalamidze chose not to participate. Kudermetova successfully defended her title, this time alongside Aryna Sabalenka, defeating Monique Adamczak and Naomi Broady 2–6, 7–6(7–5), [10–6] in the final.
Ashleigh Barty and Arina Rodionova were the defending champions, having won the previous edition in 2016, however both players chose to participate at the 2018 Miami Open instead.
Alicja Rosolska and Abigail Spears were the defending champions, but Spears chose not to participate this year. Rosolska played alongside Yang Zhaoxuan, but lost in the first round to Alexa Guarachi and Erin Routliffe.
Shuko Aoyama and Yang Zhaoxuan were the defending champions, but chose not to participate.
Irina-Camelia Begu and Monica Niculescu were the defending champions, but they chose not to participate this year.
Jarmila Gajdošová 
Junri Namigata 
