# Japan Women's Open

The Japan Women's Open Tennis is a professional women's tennis tournament played on outdoor hard courts. The event is affiliated with the Women's Tennis Association (WTA), and is an WTA 250 tournament on the WTA Tour. As successor to the Japan Open (where men and women played simultaneously, up to 2008) the event was held in women-only form for the first time in 2009, and was the second tournament of the season held in Japan: the Pan Pacific Open, a Premier 5 tournament, was held two weeks before. In 2015, the event was moved from Osaka to Tokyo and in 2018 to Hiroshima, before returning to Osaka in 2023 after a three year hiatus.

## Past finals
### Singles

| Location | Year | Champion | Runner-up | Score |
| Osaka | 2024 | Suzan Lamens | Kimberly Birrell | 6–3, 6–3 |
| Osaka | 2023 | Ashlyn Krueger | Zhu Lin | 6–3, 7–6$^{(8–6)}$ |
| 2022 | 2022 | no competition (due to financial crisis) | no competition (due to financial crisis) | no competition (due to financial crisis) |
| 2021 | 2021 | no competition (due to COVID-19 pandemic) | no competition (due to COVID-19 pandemic) | no competition (due to COVID-19 pandemic) |
| no competition (due to COVID-19 pandemic) ||
| Hiroshima | 2019 | Nao Hibino | Misaki Doi | 6–3, 6–2 |
| Hiroshima | 2018 | Hsieh Su-wei | Amanda Anisimova | 6–2, 6–2 |
| Tokyo | 2017 | Zarina Diyas | Miyu Kato | 6–2, 7–5 |
| Tokyo | 2016 | Christina McHale | Kateřina Siniaková | 3–6, 6–4, 6–4 |
| Tokyo | 2015 | Yanina Wickmayer | Magda Linette | 4–6, 6–3, 6–3 |
| Osaka | 2014 | Samantha Stosur (3) | Zarina Diyas | 7–6$^{(9–7)}$, 6–3 |
| Osaka | 2013 | Samantha Stosur (2) | Eugenie Bouchard | 3–6, 7–5, 6–2 |
| Osaka | 2012 | Heather Watson | Chang Kai-chen | 7–5, 5–7, 7–6$^{(7–4)}$ |
| Osaka | 2011 | Marion Bartoli | Samantha Stosur | 6–3, 6–1 |
| Osaka | 2010 | Tamarine Tanasugarn | Kimiko Date-Krumm | 7–5, 6–7$^{(7–4)}$, 6–1 |
| Osaka | 2009 | Samantha Stosur | Francesca Schiavone | 7–5, 6–1 |

### Doubles

| Location | Year | Champions | Runners-up | Score |
| Osaka | 2024 | Ena Shibahara Laura Siegemund | Cristina Bucșa Monica Niculescu | 3–6, 6–2, [10–2] |
| Osaka | 2023 | Anna-Lena Friedsam Nadiia Kichenok | Anna Kalinskaya Yulia Putintseva | 7–6$^{(7–3)}$, 6–3 |
| 2022 | 2022 | no competition (due to financial crisis) | no competition (due to financial crisis) | no competition (due to financial crisis) |
| 2021 | 2021 | no competition (due to COVID-19 pandemic) | no competition (due to COVID-19 pandemic) | no competition (due to COVID-19 pandemic) |
| no competition (due to COVID-19 pandemic) ||
| Hiroshima | 2019 | Misaki Doi Nao Hibino | Christina McHale Valeria Savinykh | 3–6, 6–4, [10–4] |
| Hiroshima | 2018 | Eri Hozumi Zhang Shuai (2) | Miyu Kato Makoto Ninomiya | 6–2, 6–4 |
| Tokyo | 2017 | Shuko Aoyama (3) Yang Zhaoxuan | Monique Adamczak Storm Sanders | 6–0, 2–6, [10–5] |
| Tokyo | 2016 | Shuko Aoyama (2) Makoto Ninomiya | Jocelyn Rae Anna Smith | 6–3, 6–3 |
| Tokyo | 2015 | Chan Hao-ching Chan Yung-jan | Misaki Doi Kurumi Nara | 6–1, 6–2 |
| Osaka | 2014 | Shuko Aoyama Renata Voráčová | Lara Arruabarrena Tatjana Maria | 6–1, 6–2 |
| Osaka | 2013 | Kristina Mladenovic Flavia Pennetta | Samantha Stosur Zhang Shuai | 6–4, 6–3 |
| Osaka | 2012 | Raquel Kops-Jones Abigail Spears | Kimiko Date-Krumm Heather Watson | 6–1, 6–4 |
| Osaka | 2011 | Kimiko Date-Krumm Zhang Shuai | Vania King Yaroslava Shvedova | 7–5, 3–6, [11–9] |
| Osaka | 2010 | Chang Kai-chen Lilia Osterloh | Shuko Aoyama Rika Fujiwara | 6–0, 6–3 |
| Osaka | 2009 | Chuang Chia-jung Lisa Raymond | Chanelle Scheepers Abigail Spears | 6–2, 6–4 |