| Doubles | |
|---|---|
| 2019 Japan Women's Open | |
| Champion |  Misaki Doi Nao Hibino |
| Runner-up |  Christina McHale  Valeria Savinykh |
| Score | 3–6, 6–4, [10–4] |
Eri Hozumi and Zhang Shuai were the defending champions, [1] but Zhang chose to compete in Nanchang instead. Hozumi played alongside Makoto Ninomiya, but lost in the quarterfinals to Christina McHale and Valeria Savinykh.
Misaki Doi and Nao Hibino won the title, defeating McHale and Savinykh in the final, 3–6, 6–4, [10–4].
Eri Hozumi / Makoto Ninomiya (quarterfinals)
Kirsten Flipkens / Alison Van Uytvanck (first round)
Mihaela Buzărnescu / 
Katarina Srebotnik (first round)
Georgina García Pérez / Sara Sorribes Tormo (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | E Hozumi M Ninomiya | 6 | 6 | ||||||||||||||||||||||||
 O Kalashnikova  D Kovinić | 3 | 4 | 1 | E Hozumi M Ninomiya | 5 | 2 | |||||||||||||||||||||
| C McHale V Savinykh | 6 | 6 | C McHale V Savinykh | 7 | 6 | ||||||||||||||||||||||
| WC | K Okamura A Shimizu | 4 | 3 | C McHale V Savinykh | 6 | 6 | |||||||||||||||||||||
| 4 | G García Pérez S Sorribes Tormo | 4 | 4 | H Kaji J Namigata | 4 | 1 | |||||||||||||||||||||
| A Potapova Y Sizikova | 6 | 6 | A Potapova Y Sizikova | 3 | 2 | ||||||||||||||||||||||
| H Kaji J Namigata | 7 | 6 | H Kaji J Namigata | 6 | 6 | ||||||||||||||||||||||
 P Hon  T Maria | 5 | 2 | C McHale V Savinykh | 6 | 4 | [4] | |||||||||||||||||||||
| H Carter E Shibahara | 6 | 6 | M Doi N Hibino | 3 | 6 | [10] | |||||||||||||||||||||
 J-h Choi N-l Han | 4 | 2 | H Carter E Shibahara | 5 | 4 | ||||||||||||||||||||||
| M Kato S Sanders | 6 | 6 | M Kato S Sanders | 7 | 6 | ||||||||||||||||||||||
| 3 | M Buzărnescu K Srebotnik | 4 | 3 | M Kato S Sanders | 3 | 4 | |||||||||||||||||||||
| Y Bonaventure G Minnen | 77 | 610 | [10] | M Doi N Hibino | 6 | 6 | |||||||||||||||||||||
| WC | E Hayashi M Uchijima | 65 | 712 | [7] | Y Bonaventure G Minnen | ||||||||||||||||||||||
| M Doi N Hibino | 3 | 6 | [10] | M Doi N Hibino | w/o | ||||||||||||||||||||||
| 2 | K Flipkens A Van Uytvanck | 6 | 4 | [7] | |||||||||||||||||||||||
This was a new event on the ITF Women's Circuit.
Eri Hozumi and Makoto Ninomiya were the defending champions, but both players chose to participate with different partners.
Eri Hozumi and Makoto Ninomiya were the defending champions, but Hozumi chose to participate in Canberra instead. Ninomiya partnered Shuko Aoyama and successfully defended her title, they defeated Chinese wildcards Lu Jingjing and Zhang Yuxuan in the final, 6–3, 6–0.
Shuko Aoyama and Makoto Ninomiya were the defending champions, but lost in the first round.
Shuko Aoyama and Makoto Ninomiya were the defending champions, but Aoyama chose not to participate. Ninomiya partnered Akiko Omae, and lost in the quarterfinals to Eri Hozumi and Valeria Savinykh.
Shuko Aoyama and Makoto Ninomiya were the defending champions, but chose not to compete together. Aoyama played alongside Yang Zhaoxuan, and successfully defended her title, defeating Monique Adamczak and Storm Sanders in the final 6–0, 2–6, [10–5]. Ninomiya teamed up with Renata Voráčová, but lost to Aoyama and Yang in the semifinals.
Eri Hozumi and Miyu Kato were the defending champions, but Kato chose to compete at the 2018 J&T Banka Prague Open. Hozumi chose to partner Makoto Ninomiya but lost in the semifinals to Ksenia Lykina and Emily Webley-Smith.
Shuko Aoyama and Yang Zhaoxuan were the defending champions, but Yang chose not to participate. Aoyama played alongside Duan Yingying, but lost in the semifinals to Eri Hozumi and Zhang Shuai.
Samantha Stosur and Zhang Shuai defeated the defending champions Tímea Babos and Kristina Mladenovic in the final, 6–3, 6–4 to win the women's doubles tennis title at the 2019 Australian Open.
Mihaela Buzărnescu and Raluca Olaru were the defending champions, but Buzărnescu chose not to participate this year. Olaru played alongside Darija Jurak, but lost in the semifinals to Daria Gavrilova and Ellen Perez.
Tímea Babos and Kristina Mladenovic defeated Duan Yingying and Zheng Saisai in the final, 6–2, 6–3 to win the women's doubles tennis title at the 2019 French Open.
This was the first edition of the tournament.
Coco Gauff and Caty McNally were the reigning champions, having won the last edition in 2019, but chose not to defend their title.
Eri Hozumi and Makoto Ninomiya defeated Tereza Martincová and Markéta Vondroušová in the final, 1–6, 7–6(7–4), [10–7], to win the women's doubles tennis title at the 2022 Adelaide International 2 and their first title together as a duo. Hozumi and Ninomiya saved a match point in the final.
Laura Siegemund and Vera Zvonareva defeated Alicia Barnett and Olivia Nicholls in the final, 7–5, 6–1 to win the doubles tennis title at the 2022 WTA Lyon Open.
Xu Yifan and Yang Zhaoxuan defeated Asia Muhammad and Ena Shibahara in the final, 7–5, 7–6(7–4) to win the women's doubles tennis title at the 2022 Indian Wells Masters. They became the first all-Chinese team to win a WTA 1000-level title.
Kaitlyn Christian and Sabrina Santamaria were the defending champions, but chose not to participate together. Christian signed up with Lidziya Marozava, but they withdrew before the start of the tournament because they were still playing at the Madrid Open. Santamaria played alongside Miyu Kato but lost in the quarterfinals to Julia Lohoff and Renata Voráčová.
Eri Hozumi and Makoto Ninomiya defeated Monica Niculescu and Alexandra Panova in the final, 6–7(7–9), 6–3, [10–8] to win the doubles tennis title at the 2022 Morocco Open.
Eri Hozumi and Makoto Ninomiya defeated Alicja Rosolska and Erin Routliffe in the final, 6–4, 6–7(5–7), [10–5] to win the doubles tennis title at the 2022 Bad Homburg Open.
Sabrina Santamaria and Yana Sizikova defeated Lidziya Marozava and Ingrid Gamarra Martins in the final, 3–6, 6–1, [10–8] to win the doubles tennis title at the 2023 Morocco Open.